PL2107749T3

Method for transmitting a reference signal sequence using a Zadoff-Chu sequence

Abstract

This record has no abstract on file.

Term

1.4 yearsto projected expiry

Projected expiry 1 February 2028, counted from filing; an application has no term until it is granted.

9 claims: 1 independent, 8 dependent

1
Patent claims Zastrzeżenia patentowe 1. A method of transmitting a reference signal sequence using the Zadoff-Chu sequence on the transmitting side, the method comprising:1. Sposób nadawania sekwencji sygnału referencyjnego z wykorzystaniem sekwencji Zadoff-Chu po stronie nadawczej, przy czym sposób obejmuje: obtaining a basic sequence from a number of basic sequences of varying lengths, the number of basic sequences being divided into groups, each of a number of basic sequences being generated by cyclical extension of the sequence j uzyskanie sekwencji podstawowej z pewnej liczby sekwencji podstawowych o zmiennej długości, przy czym ta pewna liczba sekwencji podstawowych jest podzielona na grupy, przy czym każda z pewnej liczby sekwencji podstawowych jest generowana przez cykliczne przedłużenie sekwencji j-ję ZC o długości , przy czym każda z grup zawiera co najmniej jedną sekwencję podstawową każdej długości, przy czym wspomniane długości odpowiadają jednemu lub wielu rozmiarom bloku zasobów, i przy czym indeks grupy sekwencji, u, jest określany na podstawie komórki co strony nadawczej, i przy czym indeks główny, q, sekwencji ZC jest dany przez użycie u, i ;ZC of length, each group containing at least one basic sequence of each length, said lengths corresponding to one or more resource block sizes, and wherein the sequence group index, u, is determined based on the cell of the transmitting side, and what the main index, q, of the ZC sequence is given by using u, i;applying a cyclic shift to the resulting base sequence corresponding to a variable cyclic shift value to generate the reference signal sequence, and transmitting the reference signal sequence to the receiving side. stosowanie do uzyskanej sekwencji podstawowej cyklicznego przesunięcia odpowiadającego zmiennej wartości cyklicznego przesunięcia dla wygenerowania sekwencji sygnału referencyjnego, i nadawanie sekwencji sygnału referencyjnegodo strony odbiorczej.

1,608 paragraphs, as filed

[0001] The present invention relates to a method of generating a reference signal sequence, and more particularly a method of grouping a variable length sequence corresponding to one or more resource block sizes, a method of generating a reference signal sequence and a method of generating a reference signal sequence using the Zadoff-Chu (ZC) sequence.

Description of the Related Art [0002] The following description includes explanations primarily from the point of view of the 3GPP LTE system, but the present invention is not limited to this system, and the preferred embodiment of the 3GPP LTE system is provided only to provide an accurate understanding of the description of the invention to those skilled in the art.

[0003] There are many sequences used for signal transmission, but in 3GPP LTE (3rd Generation Partnership Project Long Term Evolution) the basis for signal transmission is the CAZAC sequence (Constant Amplitude Zero Auto-Correlation) - constant amplitude sequence with zero autocorrelation . The CAZAC sequence can be used to extract identification or control information on various channels, such as upstream / downlink synchronization channels (SCH), including P-SCH (primary SCH) and S-SCH (ang. secondary SCH), pilot channel for reference signal transmission. The CAZAC sequence can be used for scrambling. [0004] As CAZAC sequences mainly two types of CAZAC sequences are used, i.e. the GCL CAZAC sequence and the Zadoff-Chu CAZAC sequence. Two types of CAZAC sequences are related to the relationship of complex conjugates. This means that the CAZAC GCL sequence can be obtained by calculating the complex value relative to the Zadoff-Chu CAZAC sequence. The Zadoff-Chu CAZAC sequence is given as follows.

[Equation 1] for N odd [Equation 2] for N even

where k is the sequence component index, N is the length of the CAZAC sequence generated and M is the sequence ID or sequence index.

[0005] When the Zadoff-Chu CAZAC sequence given by equations 1 and 2, and the GCL CAZAC sequence which is related to the relationship of complex conjugates with the Zadoff-Chu CAZAC sequence, are represented by c (k; N, M), then the sequence may have three properties listed below:

[Equation 3] for all k, N, M [Equation 4] il, (/ <? R </ = 0)

W) = [O / J97 yjAO) [Equation 5] for all M1, M2 and N [0006] Equation 3 means that the CAZAC sequence is always 1 size, and Equation 4 shows that the CAZAC autocorrelation function is expressed by the delta function. In this case, the autocorrelation is based on circular correlation. Equation 5 also shows that mutual correlation is always a certain constant.

[0007] Of these two types of CAZAC sequences, the following explanations are mainly focused on the Zadoff-Chu sequence (hereinafter the "ZC sequence").

[0008] In the LTE 3GPP system using this ZC sequence as the reference signal sequence, the length of the ZC sequence should be equal to the size of the resource block. It is possible to use not only sequences with a size of one resource block, but also a sequence of reference signal with a length corresponding to a multiple of the size of the resource block.

[0009] In a single cell environment, reference signals are transmitted using a localized FDM (Frequency Divisional Multiplexing) method for multiplexing signals from multiple user equipment (UE). However, in a multi-cell environment, reference signals are transmitted using the additional CDM ( Code Divisional Multiplexing) to distinguish them from signals from neighboring cells. Two types of this method are possible with this multiplexing. One of them is the CDM method using ZC sequences with different root indexes, and the other is the CDM method using ZC sequences with the same main index (M) but with a different implementation of cyclic shift.

[0010] When the length of the reference signals using these types of ZC sequences are the same, the mutual correlation values are not large in both cases. However, if reference signals of different lengths would come as interference from neighboring cells and would be transmitted in the same

-3 frequency band or overlapping frequency band, the cross-correlation value would be significant.

[0011] In a Motorola publication: "E-UTRAN Non-Synchronized Random Access Procedure", 3GPP Draft; R1-062602 RACH_PROCEDURE, 3rd Generation Partnership Project (3GPP), Mobile Competence Center; 650, Route des Lucioles; F-06921 Sophia-Antipolis Cedex; France, vol. RAN WG1, no. Seoul, Korea; 4. October 2006 (2006-10-04), XP050103110, a physical layer procedure for unsynchronized random access is disclosed, said procedure focused on the transmission and acquisition of preamble messages, and provides for four different preamble formats based on cell size, each format using 900 ms basic sequence with repetition performed for larger cells, with ZadoffChu sequence as the basis for the preamble, and wherein a different number of zero correlation zones are designated for each format. In addition, preamble assignments can be made by selecting multiple groups; for example, if 64 preambles are needed in a 3 km cell, 4 different ZC-ZCZ sequence groups can be assigned to the cell.

[0012] US 2005/0226140 A1 discloses a method of assigning pilot sequences selected from a group of pilot sequences constructed from a set of GCL (Generalized Chirp-Like) sequences of length Np.

SUMMARY OF THE INVENTION [0013] Accordingly, the present invention is directed to providing a method of generating a reference signal sequence that minimizes interference caused by signals of varying length arriving from neighboring cells.

[0014] As part of this method, the present invention also includes a method of efficiently grouping sequences so that each group consists of sequences with a high mutual correlation value, and supports the use of variable length sequences as reference signals.

[0015] The present invention further provides a method of generating, based on the above grouping, a reference signal sequence. The objects of the present invention are achieved in accordance with the content of the independent claims.

[0016] According to one embodiment of the present invention, a method of grouping sequences having a variable length corresponding to one size or a multiple of the size of a resource block is provided. According to one embodiment, the method includes: combining the sequences into groups such that each group contains at least one sequence of each length, the grouped sequence being the basic sequence that is used to perform the cyclic shift corresponding to the variable value of the cyclic shift, and the basic sequence with this cyclic shift is used as the reference signal sequence.

[0017] It is preferred that the number of groups is 30.

[0018] In addition, said grouping can be performed such that each group contains one basic sequence of each length corresponding to 1 to 5 times the size of the resource block, and two basic sequences of each length corresponding to 6 times or more times the size of the resource block .

Preferably, a basic sequence with a length corresponding to 3 or more times the size of the resource block is defined using the Zadoff-Chu (ZC) sequence, and a basic sequence with a length that corresponds to 1 or 2 times the block size resources using a sequence other than the ZC sequence.

[0020] In another aspect, the present invention relates to a method of generating a reference signal sequence. In one embodiment of this aspect, the method includes: defining one or more base sequences of variable length corresponding to the size of the resource block or a multiple of the size of the resource block; and applying a cyclic shift corresponding to a variable value of the cyclic shift to the defined basic sequence, wherein the basic sequences are divided into groups each containing at least one basic sequence of any length.

[0021] In this case, the base sequence may be defined by a cyclic extension of the ZC sequence with a length (W ™) given by the largest prime number that is smaller than the size of the corresponding reference signal sequence. The base sequence can also be defined by truncating a ZC sequence with a length (W ™) given by the smallest prime number that is larger than the size of the respective reference signal sequence.

[0022] Also in this variant, it is preferred if the number of groups is 30.

[0023] Each of the groups may contain one basic sequence with a length equal to 1 to 5 times the size of the resource block and two basic sequences with a length equal to 6 times or more times the size of the resource block.

[0024] In addition, a basic sequence with a length corresponding to 3 times or more times the size of a resource block can be defined using Zadoff-Chu (ZC) sequence with a specific ZC (q) sequence index, and a basic sequence with a length corresponding to 1 or 2 times The resource block size can be defined using a different sequence other than the ZC sequence.

[0025] Preferably, the specific ZC sequence index (q) is a function of the group index (u) and the index of the primary sequence number (v) within the group.

[0026] The defined cyclic shift base sequence can be used as the uplink reference signal sequence.

[0027] Furthermore, in the above embodiments, the resource block size may correspond to the size of 12 subcarriers in the frequency domain.

In another aspect, the present invention relates to a method of generating a reference signal sequence using the Zadoff-Chu (ZC) sequence. In one embodiment of this aspect, the method comprises: defining a specific base sequence using the q-th main sequence of ZC (ang. root ZC sequence), where the basic sequences are divided into groups, and "q" is a function of the group index (u) and the index of the basic sequence number (v) within the group, and the use of a cyclic shift corresponding to the variable value of the cyclic shift to the defined basic sequence for generating a reference signal sequence.

[0029] In one case, the specific ZC (q) sequence index can be determined from one of the equations:

-5 (1)

(2)

(3)

what where is the length given by the largest prime number that is smaller than the size / VRS, the appropriate reference signal sequence is the size of the appropriate reference signal sequence, "round (z)" is a function of rounding to the nearest integer nearest to z, and "floor (z)" is a function of determining the largest integer not greater than z. However, in another every embodiment of the present invention may be the length given by the smallest prime number that is greater than the corresponding reference signal sequence.

[0030] In another case, the specific ZC (q) sequence index may be determined from one of the equations:

(1)

F * _ι_ · Ί \ i lloor (Woor (y + 0,5) -y)+vq = tloor (y + 0.5) + tloor (-1) 'gcfz / ey =

Wg (o + 1) reference, xue {0,1, ..., 29}, ve {0,1, ..., 1loor (N ^ I30) -1} (2) q = iloor (y + 0 , 5) + «oor ^} (- 1)"OOF (Wo°r (y + 0’5)>') + V (Λ / 2? -1) (υ + 1) "where y = \, f * M-f, ue {0,1, ..., 29}, ve {0,1, ..., 1loor (N ™ l3Q) -1} • '• reference, 2C ~ 1

-6 (3) ą = # oor (y + 0.5) + «oor (andT) - (- 1) "t> l, r,"<Wr ()'L (L’5|‘'| L'' where y = iloor [ mrs x- + 0.5 (u + 1), eu {0,1, ..., 29}, υε <0,1, ..., // οογ (Λ ^ / 30) -1} reference, zc J is the length given by the largest prime number that is smaller than the size where

inRS.

the corresponding reference sequence is the size of the corresponding reference sequence, "round (z)" is a function of rounding to the nearest integer nearest to z, and "floor (z)" is a function of determining the largest integer not greater than z. However, in another an embodiment of the present invention may be the length given by the smallest prime number that is greater than the corresponding reference signal sequence.

[0031] In one particular embodiment of the invention, the maximum value of the base sequence number index (v) within each group can be set to 2, and then the specific ZC (q) sequence index can be determined from one of the equations:

(1) q = round (y) + v (-1)/, Oor (2y) where

Nzc (u + 1) _ Λ y = nRS -, ue {0,1, ..., 29}, ve {0,1} in reference, zc (2) q = round (y) + w (-1) "° happinessrin>

where (W ^ -1) (u + 1) y = \ uss n—7, ue {0,1 ..... 29}, ve {0, l} '* reference, zc ~ 1 or (3)

-7 q = round {y) + ν · (-1)f / oor (2y) where cnrs ay = round {"R $" - (w + 1), u ^ {0,1, ..., 29}, ve {0,1} \ »vreference, zcd or from one of the equations:

(1) q = floor (y + Q, 5) + v (-1)and / 00F <2y) where

Nzc (u + 1) y -> eu{°>1 , - -, 29), ^ (0,1} · * reference, zc (2) q = tloor (y + 0,5) + v - (- 1)Ηο° Ί2> '> where (w2? -1) (w + 1) y = Λ -1, «6 (0.1, ..., 29}, V6 {O, 1} *» reference, zc ~ 1 or (3) ą = ffoor (y + 0,5) + v (-1) "° happinessf (2y> where (NRS Λ y = 1loor [- + 0,5 (u + 1), ue {0,1 ..... 29}, ve {0,1}

V Mreference, with c J e.g. DC [0032] NreferenCe, ZC can preferably be set to 31 or 37, but No. ference zc can also be set to other values.

[0033] In accordance with these embodiments of the present invention, since the base sequences for using the cyclic shift are grouped and each group contains at least one base sequence of any length, UE devices may use sequences of different lengths as a reference signal sequence when one cell or Node B node is assigned a specific group.

[0034] In addition, since each group contains basic sequences having a high mutual correlation ratio, if each group is assigned to one cell or Node B, it is possible to minimize intercellular interference.

DESCRIPTION OF THE FIGURES [0035] The attached drawing, which is included to increase the degree of intelligibility, illustrates embodiments of the invention and together with the description serves to explain the principles of the invention.

[0036] In the drawing:

Fig. 1 is a conceptual diagram for explaining a method for generating a truncated sequence.

Fig. 2 is a conceptual diagram for explaining the generation method using the filler part.

Figures 3 to 5 show conceptual diagrams of grouping sequences according to one embodiment of the invention.

DESCRIPTION OF EMBODIMENTS [0037] In the following, with reference to the accompanying drawings, preferred embodiments of the present invention are described in detail. It is clear that the detailed description provided with the figures is intended to provide embodiments of the present invention, and does not represent the only possible embodiment of the invention.

[0038] The following detailed description includes detailed issues providing a full understanding of the present invention. However, it is obvious to those skilled in the art that the present invention may be implemented without considering these specific issues. To avoid ambiguity, discussions of prior art concepts, constructions and devices have been omitted or presented in block diagram form based on the main functions of each design and device. Also, whenever possible, the same reference numerals in the drawings and description are used to identify the same or similar parts.

[0039] As stated above, the object of the invention is to provide a method for generating a reference signal sequence that minimizes interference caused by signals of varying length originating from neighboring cells.

[0040] To this end, the problem of the length of the CAZAC sequence has been described.

[0041] At present, in the LTE 3GPP system, the resource block (RB) size for transmitting all types of OFDM symbols including the reference signal symbol corresponds to 12 subcarriers. Thus, when generating the ZC sequence of the uplink reference signal, the size of the ZC sequence would be 12 subcarriers.

[0042] In the case of the CAZAC sequence, the number of CAZAC sequence indexes (M) that could be different from each other is determined by the number of relatively prime or prime numbers for the length of the sequence (N). Thus, when a ZC sequence of 12 lengths is generated, the number of ZC sequences with different sequence indexes is 4. However, if the ZC sequence is generated based on the length (N) being a prime number, then the number of ZC sequences having different sequence indexes can be N-1, which maximizes

-9 number of ZC sequences. Therefore, various methods are used to generate the CAZAC sequence based on the prime length.

[0043] The method of generating sequences by clipping is explained first.

[0044] Fig. 1 is a conceptual diagram explaining a method for generating a clipping sequence. [0045] As shown in Fig. 1, when the length "L" of the CAZAC sequence is required, a CAZAC sequence is generated having the length being the prime number "X" (where X> L). Then the generated CAZAC sequence having the length "X" is shortened to the length "L", i.e. the portion of the sequence "X-L" is cut off.

[0046] In this way, the number of CAZAC sequences is maximized. But since part of the generated sequence is truncated, the CAZAC self / reciprocal correlation properties of the CAZAC sequence deteriorate somewhat, explained by Equations 2 and 5. In addition, after eliminating sequences having weak correlation properties, the actual number of sequences decreases. In addition, due to shortening, the good PAPR properties of the CAZAC sequence may also be compromised.

[0047] Accordingly, another type of method for producing CAZAC sequences based on prime numbers is provided. One of these methods is that a CAZAC sequence having the length "X" (where X <L) equal to the prime number is generated, and the components having the length "L-X" are added to the generated CAZAC sequence. These components added to the generated sequence can be called a filler part, so this method can be called a filler generation method.

[0048] Fig. 2 is a conceptual diagram explaining a generation method using a filler part.

[0049] As shown in Fig. 2, when the required length of the CAZAC sequence is "L", a CAZAC sequence with the length "X" is generated, which is the maximum prime number smaller than "L". Then a filler part having the length "LX" is added to the generated sequence.

[0050] According to one method of this kind, the filling portion may consist of zeros. In this way it is possible to maximize the number of CAZAC sequences. In addition, CAZAC self / reciprocal correlation properties can be maintained when sequence discrimination is performed with respect to the length "C1" in Fig. 2.

[0051] Furthermore, preferably, the filler portion may be a cyclic extension of the CAZAC sequence. This means that the filler part (C2) can be generated by cyclically copying the first part of the generated CAZAC sequence and adding it to the generated sequence. The sequence thus obtained may have good self-correlation properties, even when sequence discrimination is made over the entire length (L) of the sequence. Thus, this method has an additional advantage over the above method using the filling part in the form of zeros.

[0052] The present invention, intended to generate a reference signal sequence using the CAZAC sequence, is mainly based on a method of generating using the padding portion produced by said cyclic extension. However, a limitation to this method of production is not necessary, which means that the present invention can be based on a method of generating a sequence with clipping and on a method of generation using a filling part consisting of zeros.

[0053] On this basis, the occurrence of intercellular interference caused by the use of sequences of different lengths is explained.

[0054] When the CAZAC sequence is used for the reference signal sequence, intercellular interference is proportional to the inter-correlation value between the two sequences. Thus, in the examples below, the value of mutual correlation, caused by the overlap of the original reference signal transmitted by a certain resource area and the sequence originating from neighboring cells, showing a length difference from the original reference signal, and transmitted by the same resource area, is considered in relation to to the ZC sequence index.

[0055] In particular, the sequences 1 RB, 2 RB and 3 RB in length are included in the examples below. Suppose that 1 RB and 2 RB sequences are generated by cyclic extension of the ZC sequence by the length specified by the largest prime number that is smaller than the size of the corresponding resource block. Suppose further that a 3 RB sequence is generated using the clipping method. This means that it is possible to generate a sequence to obtain the appropriate resource block size based on the prime length using one of the above-mentioned generation methods.

[0056] First, consider the case when the 1 RB sequence overlaps with the 2 RB sequence in the same resource area. A 1 RB long sequence and 2 RB long sequence can be expressed as described below.

[Equation 6] glffS(ft-, Ą) = e, k = 0, ..., 7 / -1

-7-i, k (k + y

4fc 1 J <* [0057] s1 and s2 are indexes here, which are relatively prime numbers in relation to the length of the sequence (N or 2N). In this example, for sequences 1 RB long and 2 RB long, which are generated using the cyclic extension method, s1 can be 1, 2, ..., 10, as2 can be 1,2, .., 22. At the same time N1 can be 11 a N2 can be 23.

[0058] Accordingly, the value of mutual correlation (c (d; s1, s2)) generated when a sequence of 1 RB length overlaps with a sequence of 2 RB length in the area of the first 12 subcarriers of a length of 2 RB, can be expressed in a way described below.

[Equation 7]

[0059] It can be deduced from equation 7 that if the combination of sequence indexes (s1 and s2) satisfies | Α- ± Ί (23 lj condition that the expression becomes close to zero), the sequences indicated by these sequence indexes show high mutual correlation.

[0060] Therefore, in one embodiment of the present invention, it is proposed to group the sequences into groups such that the sequences in each group have a high mutual correlation ratio. And, if the length of the 1 RB sequence and the length of the 2 RB sequence are considered, then it is proposed to group combinations of sequence indices that

A _V | (23 llj satisfies the condition that the word becomes close to zero.

[0061] However, to determine a more general condition for sequence grouping, let's consider some other examples.

[0062] When the RB 1 sequence overlaps the last 12 subcarriers of the RB 2 sequence area, the (c (d; s1, s2)) correlation value of these two sequences can be represented as described below.

[Equation 8] »-i ^; - ί.Γ3) = Σ2ΐβ ^^^ +12+^ 2) bC for d. = 0, c (^^(jj = 2-exP ^ / E ^mod^’^_L^mod (L’?/’9+l)Jexp [/ sand2nl <) tl^+12’2 / z_li (NIODE (i'+l2’2-IV‘1)+1)] = gkpp ^ (. r+i) (ii)+Łi2- (Kfi3) ^ and [0063] It can also be concluded from equation 8 that if the combination of sequence indexes (s1 and s2) satisfies the condition that the word becomes close to zero, then the sequences indicated by these sequence indexes result in high mutual correlation . Thus, if 1 RB sequences and 2 RB sequences are considered, then the overlap does not change the grouping condition.

[0064] Let's consider the case where the 1 RB sequence and 3 RB sequence coincide in the same resource area.

[0065] First of all, a 1 RB sequence and a 3 RB sequence may be expressed as described below.

[Equation 9]

[0066] s1 and s3 are indexes here, which are relatively prime numbers in relation to the length of the sequence (N or 3N). In this example, since the 1 RB sequence is generated by the cyclic extension method, and the 3RB sequence is generated by the sequence clipping method, then s1 can be 1, 2, 10 as2 can be 1, 2, 36. At the same time N1 can be 11, and N2 can be 37.

[0067] Therefore, if the 1 RB sequence overlaps within the first 12 subcarriers per 3 RB sequence, the inter-correlation value between the two sequences can be represented as described below.

[

Equation 10]

N-1 * c (d; ή,) = 2 gr (k jjj jg (k + 1 /, j3).

fc-a for rf = 0, c (0; 5 ,, J3) = 2 exP f ~ J Λ mod (fc, Nl) (mod (fc, N -1) +1) j exp (/ +1) j = [2expPw+1)^-^)]+^ exp.n.12) [0068] It can be deduced from equation 10 that if the combination of sequence indexes (s1 and s3) satisfies the condition that the expression becomes close to zero, then the sequences indicated by these sequence indexes show high mutual correlation. Therefore, if the length of the RB sequence and length are considered

- 13 RB 3 sequences, it is proposed to group combinations of sequence indexes that satisfy the condition that the expression

becomes close to zero.

[0069] To confirm the relationship with the overlap, consider the case when the 1 RB sequence overlaps in the second range of 12 subcarriers with the 3 RB sequence. In this case, the mutual correlation value of these two sequences can be expressed as described below.

[Equation 11]

[0070] And when the 1 RB sequence is superimposed over the last 12 subcarriers over the 3 RB sequence, the inter-correlation value can be expressed as described below.

[Equation 12]

[0071] From equations 11 and 12 it can also be concluded that if the combination of sequence indices (s1 and s3) meets

I 37 11 J condition that the word becomes close to zero, then the sequences indicated by these sequence indexes result in high mutual correlation. Thus, if 1 RB sequences and 2 RB sequences are considered, then the overlap does not change the grouping condition.

[0072] According to the above examples, in the present embodiment it is proposed to implement sequence grouping, for example such that two of all sequence indexes in the same group satisfy the condition that the word (s2 / N2 - s1 / N1) becomes close zeros when they are taken into account

- 14 two sequences with length N1 and N2. N1 and N2 may be the maximum or prime numbers that are smaller than the resulting reference signal sequence, s1 and s2 are the root index of the ZC sequence, and can be selected from ranges 1 to (N1- 1), and from 1 to (N2-1).

[0073] Based on this concept, let's consider a more general grouping method that includes sequences of different lengths.

[0074] Figs. 3 to 5 show conceptual diagrams of grouping sequences according to one embodiment of the present invention.

[0075] In this embodiment, among sequences of different lengths, e.g. 1 RB, 2 RB, 3 RB as shown in Fig. 3, sequences whose indexes satisfy the condition of a high value of mutual correlation, as stated above, can be placed in the same group. And each of the sequence groups can be assigned to the same cell or node Node B.

[0076] Generally, FDM multiplexing is performed, the entity is a cell or node B, so that interference caused by the use of sequences of different lengths can be minimized within one cell or node B. Thus, by assigning to the same cell or node Node B sequences having a high mutual correlation ratio can minimize intercellular interference caused by sequences of different lengths.

[0077] In another embodiment of the present invention, it is proposed to implement the grouping such that each group contains at least one sequence of any length. In this way, if the sequence group is allocated to the same Node B cell or node, then the UE (device) of the UE, located in that Node B cell or node, may be supported in the use of reference signal sequences of different length. But a specific grouping method can be defined differently.

[0078] First, the number of sequences allocated to one group may be proportional to the number of RBs corresponding to the length of the reference signal sequence. In Figure 3, sequences are grouped, one with RB sequence length 1, two RB sequence length, three RB sequence length 3, and so on. [0079] Secondly, the number of sequences assigned to one group may be a constant number. In fig. 4, one sequence is grouped in the same group for each length of the RB sequence.

[0080] In the present embodiment, the grouping can be determined such that the number of sequences assigned to one group is neither proportional to the length of the sequence nor constant. Fig. 5 shows an example of grouping a sequence such that one group consists of one sequence with 1 RB sequence length, 2 sequences with 2 RB sequence length, 2 sequences with 3 RB sequence length, and 3 sequences with 4 RB sequence length, and so further.

[0081] As above, if each group contains at least one sequence of each RB length, the maximum number of sequences of one group may be determined. When the maximum number of sequences of one group is determined, the method of selecting the main index of the ZC sequence within the number of sequences can be determined as described below.

[0082] If one sequence is selected for each length of the RB sequence, and if one specific sequence with the index s1 and length N1 is already selected for this group, then one sequence (having the index s2) of each length RB for which the index can be selected brings the word (s2 / N2 - s1 / N1) closest to zero, with N2 being the length of the sequence corresponding to the length considered RB. And if 2 sequences are selected for each length of the RB sequence, and if one specific sequence with the index s1 and

- the length N1 is already selected for this group, two sequences for each length RB can be selected, bringing the word (s2 / N2 - s1 / N1) close to zero. This can be generalized for the maximum number of "x" sequences

for each RB length.

[0083] It is possible to define another grouping method as described below. If one sequence is selected for each length of the RB sequence, and if one specific sequence with the index s1 and length N1 is already selected for this group, first select a certain number (s) of sequences from the sequences that bring the expression (s2 / N2 - s1 / N1) near a certain value, and then choose one sequence from the y sequence that has a high mutual correlation value with the sequence index s1. And if 2 sequences are selected for each length of the RB sequence, and if one specific sequence with the index s1 and length N1 is already selected for this group, first select a certain number (s) of sequences from the sequences that bring the expression (s2 / N2 - s1 / N1) near a certain value, and then select from among y sequences two sequences that have a high value of mutual correlation with the sequence with index s1. This can be generalized for the maximum number of "x" sequences for each length RB.

[0084] In the above examples, one particular sequence with the index s1 and length N1 is first selected and becomes the reference for choosing the rest of the sequence. This reference sequence may be defined as a 1 RB long sequence, 2 RB long sequence, 3 RB long sequence, and so on. But in the explanation below suppose that the reference sequence is a 3 RB sequence. And since the number of indexes per RB length is 30, the number of sequence groups for grouping in this embodiment of the invention may be 30.

[0085] Given that the number of main indexes for 3 RB sequences is 30, the number of main indexes selected for a certain group can be determined as described below.

[Equation 13] round (main index number for a sequence of certain length RB / 30) [0086] Here, "round (z)" is a function of rounding to the nearest integer nearest to z.

[0087] By using equation 13, 1 sequence can be selected for 3 RB, and 4 RB. And for a length of 5 RB 6 RB, 2 sequences can be selected. In addition, for a length greater than 6 RB, it is possible to select 3 or more sequences, respectively. And, according to one embodiment of the present invention, a sequence less than 3 RB may be defined differently, for example without using the ZC sequence. In this way, the number of sequences selected for length 1 RB and length 2 RB can be determined as 1.

[0088] To sum up, according to this embodiment, the number of sequences per group can be determined as described below.

[Equation 14] {1RB, 2RB, 3RB, 4RB, 5RB, 6RB, 8RB, 9RB, 10RB, 12RB, 15RB, 16RB, 18RB, 20RB, 24RB, 25RB,.} = {1, 1, 1, 1, 2 , 2, 3, 3, 4, 5, 6, 6, 7, 8, 9, 9,.}

[0089] The following Tables 1-5, based on this, provide an example of such grouping of sequences that each group contains the number of sequences according to equation 14, and the sequences selected for each group fulfill the condition of high mutual correlation as stated above.

- 17 [Table 1]

(continuation

<td>indium. groups based on 3 RB</td><td>3RB</td><td>4RB</td><td colspan="2">5RB</td><td colspan="2">6RB</td><td colspan="3">8RB</td><td colspan="3">9RB</td>

- 18 [Table 2]

<td>indium. groups, based on 3 RB</td><td colspan="4">10RB</td><td colspan="5">12RB</td><td colspan="6">15RB</td>

(continuation)

<td>indium. groups, based on 3 RB</td><td colspan="4">10RB</td><td colspan="5">12RB</td><td colspan="6">15RB</td>

- 19 [Table 3]

<td>indium. groups, based on 3 RB</td><td colspan="6">16RB</td><td colspan="7">18RB</td>

(continuation)

<td>indium. groups, based on 3 RB</td><td colspan="6">16RB</td><td colspan="7">18RB</td>

- 20 [Table 4]

<td></td><td>m</td><td>tt</td><td> 23</td><td>tt</td><td> 50</td><td>Oi rt</td><td>What What</td><td>ABOUT this</td><td>HIM r-</td><td> 87</td><td>LO CD</td><td>tt</td><td>rt CM</td><td> 132</td><td>tt</td><td> 142</td><td>AND-rt</td><td>ABOUT LO</td><td> 169</td><td> 187</td><td>this 03</td><td> 205</td><td> 214</td><td> 215</td><td> 224</td>

<td></td><td>h-</td><td>CM</td><td>T</td><td>WHAT</td><td>CM</td><td> ,—</td><td>about</td><td>r-</td><td>WHAT</td><td>rt</td><td>tT</td><td>WHAT</td><td>rt</td><td>tt</td><td>rt</td><td>ABOUT</td><td> 03</td><td>HIM</td><td>r ~</td><td> 03</td><td>WHAT</td><td>t</td><td>LO</td><td>rt</td><td>CM</td>

<td></td><td></td><td>CM</td><td>What</td><td>WHAT</td><td>tt</td><td>rt</td><td>What</td><td>r-</td><td> 00</td><td>CD</td><td>ABOUT</td><td>about</td><td>T</td><td>CM</td><td>rt</td><td>rt</td><td>rt</td><td>this</td><td></td><td>| r-</td><td>CG</td><td> □)</td><td>ABOUT</td><td>CM</td><td>rt</td>

<td></td><td>this</td><td>rt</td><td>M "</td><td>about</td><td>CD</td><td>CC ·</td><td>r-</td><td>about</td><td>CD</td><td> 00</td><td>r-</td><td>rt</td><td>CM</td><td></td><td>about</td><td>rt</td><td>CM</td><td></td><td>about</td><td>LO</td><td>rt</td><td></td><td>rt</td><td>LO</td><td>rt</td>

<td></td><td></td><td>V</td><td>CM</td><td>tt</td><td>tt</td><td>rt ·</td><td>What</td><td>h-</td><td>r ^ ·</td><td>What</td><td>CD</td><td>T</td><td>CM</td><td>rt</td><td>tt</td><td>tt</td><td>rt</td><td>this</td><td></td><td>OC</td><td> 03</td><td>about</td><td> 5—</td><td>t</td><td>LM</td>

<td></td><td>CM</td><td></td><td>ABOUT</td><td>tt</td><td>rt</td><td>CM</td><td>T</td><td>this</td><td>rt</td><td>TJ</td><td>What</td><td>h-</td><td><O</td><td>rt</td><td>tt</td><td>CD</td><td>WHAT</td><td>K</td><td>What</td><td>ABOUT</td><td> 03</td><td>WHAT</td><td>r-</td><td>CM</td><td></td>

<td></td><td>t</td><td>CM</td><td>rt</td><td>rt</td><td>tt</td><td>rt</td><td>CD</td><td>Γ-</td><td>What</td><td>CD</td><td>about</td><td>about</td><td>v-</td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>this</td><td>t</td><td>WHAT</td><td>CG</td><td>CD</td><td>about</td><td>CM</td><td>rt</td>

<td>ω</td><td>h-</td><td>LO</td><td>rt</td><td>CD</td><td>What</td><td>H</td><td>WHAT</td><td></td><td>ABOUT</td><td>CD</td><td>O0</td><td>CM</td><td></td><td>ABOUT</td><td>CD</td><td>tt</td><td>rt</td><td>CMI</td><td></td><td>rt</td><td>TT</td><td>rt</td><td>CM</td><td>AND·'',</td><td>LO</td>

<td rowspan="2">tr</td><td></td><td>T-</td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>What</td><td></td><td>What</td><td>What</td><td>CD</td><td>T—</td><td>LM</td><td>rt</td><td>rt</td><td>tt</td><td>rt</td><td>this</td><td></td><td>What</td><td> 03</td><td>about</td><td>Λ-</td><td></td><td>CM</td>

<td></td><td></td><td>ABOUT</td><td><D</td><td>rt</td><td rowspan="2"> 3</td><td>rt</td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>CM</td><td>What</td><td>t</td><td>WHAT</td><td>rt</td><td>What</td><td>tr</td><td>this</td><td>rt</td><td></td><td>ABOUT</td><td>CD</td><td>rt</td><td></td><td>ABOUT</td>

<td></td><td>T-</td><td>CM</td><td>CM</td><td>rt</td><td>rt</td><td>WHAT</td><td>r-</td><td>cc-</td><td>CD</td><td>ABOUT</td><td>about</td><td>T-</td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>WHAT</td><td>t</td><td> 00</td><td> 03</td><td> 03</td><td>about</td><td>CM</td><td>rt</td>

<td></td><td>cc</td><td>t</td><td><O</td><td>WHAT</td><td>t</td><td>LO</td><td>rt</td><td>CM</td><td></td><td>ABOUT</td><td>CD</td><td>T</td><td>about</td><td> 03</td><td>HIM</td><td>rt</td><td>tt</td><td>rt</td><td>CM</td><td>tt</td><td>CG</td><td>CM</td><td>ι-</td><td> 00</td><td> 1^</td>

<td></td><td></td><td></td><td>CM</td><td>rt</td><td>TT</td><td>rt</td><td>What</td><td>r-</td><td>What</td><td>CD</td><td>CD</td><td>t</td><td>CM</td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>this</td><td>it-</td><td>What</td><td> 03</td><td>ABOUT</td><td></td><td></td><td>LM</td>

<td></td><td>ABOUT</td><td>σ></td><td>WHAT</td><td>What</td><td>tn</td><td rowspan="2"> 3</td><td>rt</td><td>tt</td><td>rt</td><td>CM</td><td>and-</td><td>about</td><td>rt</td><td>t</td><td>LO</td><td>Γ-</td><td>LO</td><td>rt</td><td>tt</td><td>CM</td><td></td><td>about</td><td> 03</td><td>ABOUT</td><td> 03</td>

<td></td><td>l-</td><td>T</td><td>CM</td><td>rt</td><td>tt</td><td>What</td><td>AND·"</td><td>CC-</td><td>CD</td><td>ABOUT</td><td>about</td><td>T</td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>this</td><td></td><td> 00</td><td>ol</td><td>about</td><td>ABOUT</td><td>CM</td><td>CM</td>

<td></td><td>a></td><td>What</td><td>r-</td><td>r-</td><td>What</td><td>rt</td><td>tt</td><td>rt</td><td>CM</td><td> ,-</td><td>ABOUT</td><td>about</td><td>σι</td><td>rt</td><td>r ~</td><td>this</td><td>rt</td><td>TT</td><td>rt</td><td>rt</td><td>CM</td><td></td><td>ABOUT</td><td>L73</td><td>rt</td>

<td></td><td></td><td></td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>What</td><td>r> -</td><td>WHAT</td><td>CD</td><td>about</td><td>T</td><td>T "</td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>this</td><td></td><td>O0</td><td> 03</td><td>ABOUT</td><td>t</td><td></td><td>CM</td>

<td></td><td>ττ</td><td>a></td><td></td><td></td><td>rt</td><td></td><td></td><td> 00</td><td>rt</td><td></td><td></td><td>ol</td><td></td><td></td><td>CM</td><td>h *</td><td></td><td></td><td>ABOUT</td><td></td><td></td><td>WHAT</td><td>t =</td><td></td><td></td>

<td></td><td></td><td>CM</td><td>ABOUT</td><td>tt</td><td>CM</td><td>rt</td><td>t</td><td>rt</td><td>What</td><td>tt</td><td>What</td><td>CD</td><td>K</td><td></td><td> 03</td><td>about</td><td>WHAT</td><td>CM</td><td>rt</td><td></td><td>rt</td><td>rt</td><td>tt</td><td>CM</td><td>LO</td>

<td></td><td>m</td><td>WHAT</td><td>LO</td><td>WHAT</td><td>WHAT</td><td>σι</td><td>l-</td><td> 03</td><td>CMi</td><td>ABOUT</td><td>CM</td><td>ABOUT</td><td>rt</td><td>rt</td><td>rt</td><td>WHAT</td><td>tt</td><td>this</td><td> 03</td><td>r-</td><td> 03</td><td></td><td>about</td><td>rt</td><td>about</td>

<td></td><td></td><td> —</td><td>CM</td><td>CM</td><td>rt</td><td>ττ</td><td>rt</td><td>rt</td><td>t</td><td>rt</td><td>rt</td><td> 03</td><td>about</td><td>about</td><td>T</td><td>CM</td><td>rt</td><td>rt</td><td>tt</td><td>rt</td><td>rt</td><td>this</td><td>rt</td><td>oo</td><td>ol</td>

<td></td><td>about</td><td>WHAT</td><td> ,—</td><td>rt</td><td></td><td>tt</td><td>WHAT</td><td>tt</td><td>r "-</td><td>rt</td><td>t</td><td>this</td><td>rt</td><td>ABOUT</td><td>What</td><td>v</td><td>ol</td><td></td><td>tt</td><td>CM</td><td>tt</td><td>CM</td><td>rt</td><td>rt</td><td>rt</td>

<td>about</td><td>this</td><td>K</td><td>rt</td><td>0i</td><td>h-</td><td>· cc</td><td>CM</td><td>ABOUT</td><td></td><td>CD</td><td>rt</td><td> ,—</td><td>CM</td><td><O</td><td>tt</td><td>rt</td><td>rt</td><td>S</td><td>What</td><td>L0</td><td>about</td><td>rt</td><td> 03</td><td>r ~</td><td></td>

<td>CM</td><td></td><td>t</td><td>CM</td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>LO</td><td>r-</td><td>t</td><td>rt</td><td> 03</td><td>ABOUT</td><td>ABOUT</td><td></td><td>CM</td><td>rt</td><td>rt</td><td>tt</td><td>rt</td><td>LO</td><td>What</td><td>r-</td><td>rt</td><td> 03</td>

<td></td><td>CD</td><td>tt</td><td>CM</td><td>CM</td><td>ABOUT</td><td>in</td><td>rt</td><td>rt</td><td>rt</td><td>LO</td><td> <0</td><td>TT</td><td>ol</td><td>CD</td><td>h-</td><td>CM</td><td>ABOUT</td><td>about</td><td>rt</td><td>rt</td><td>tn</td><td>r =</td><td>LO</td><td>tt</td><td>tt</td>

<td></td><td></td><td>T =</td><td>CM</td><td>rt</td><td>tt</td><td>tt</td><td>rt</td><td>LO</td><td>LO</td><td>D-</td><td>rt</td><td> 03</td><td>ol</td><td>ABOUT</td><td></td><td>CM</td><td>rt</td><td>tt</td><td>tt</td><td>rt</td><td>LO</td><td>r-></td><td>h-</td><td>rt</td><td> 03</td>

<td></td><td>h-</td><td>LO</td><td>tt</td><td>about</td><td>WHAT</td><td>t</td><td>rt</td><td>T</td><td>about</td><td>WHAT</td><td>tt</td><td>CM</td><td></td><td>ih-</td><td>rt</td><td>tt</td><td>CM</td><td>WHAT</td><td>= h-</td><td>rt</td><td></td><td>CD</td><td>rt</td><td>LO</td><td>CM</td>

<td></td><td></td><td>T ~</td><td>CM</td><td>What</td><td>rt</td><td>tt</td><td>rt</td><td>WHAT</td><td>t</td><td>h-</td><td>rt</td><td> 03</td><td>about</td><td>about</td><td>-ς-</td><td>CM</td><td>rt</td><td>rt</td><td>tt</td><td>rt</td><td>this</td><td>WHAT</td><td>r-</td><td>ro</td><td> 03</td>

<td></td><td> 00</td><td>rt</td><td>WHAT</td><td></td><td>cD</td><td>this</td><td>tt</td><td>CM</td><td>a></td><td>n</td><td>rt</td><td>rt</td><td>ABOUT</td><td> «</td><td>LO</td><td>rt</td><td></td><td> 03</td><td>LO</td><td>tt</td><td>CM</td><td>about</td><td>h-</td><td>IO</td><td>rt</td>

<td></td><td></td><td>T "</td><td>CM</td><td>rt</td><td>rt</td><td>tt</td><td>rt</td><td>WHAT</td><td>WHAT</td><td>t</td><td>rt</td><td> 03</td><td>about</td><td>about</td><td>E-</td><td>CM</td><td>rt</td><td>rt</td><td>tt</td><td>rt</td><td>this</td><td>AND·'-.</td><td>t</td><td>rt</td><td> 03</td>

<td> 03</td><td> 7-</td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>LO</td><td>r-</td><td>CC '</td><td> 03</td><td>about</td><td></td><td>CM</td><td>rt</td><td>tt</td><td>rt</td><td>CD</td><td>t</td><td>What</td><td> 03</td><td>about</td><td></td><td>CM</td><td>rt</td><td>tt</td><td>rt</td>

- 22 [Table 5]

<td>indium. groups, based on 3 RB</td><td colspan="9">25RBs</td>

[0090] In tables 1 ~ 5, 1 RB and 2 RB sequences are not shown, because 1 RB and 2 RB sequences are defined differently.

[0091] In another example, given that the number of main indexes for a 3 RB length sequence is 30, the number of main indexes selected for a certain group can be determined as described below.

[Equation 15]

- 23 floor (main index number for sequences of a certain length RB / 30) [0092] Here floor (z) is a function giving the largest integer not greater than z.

[0093] By means of equation 15, for a length of 3 ~ 5 RB, 1 sequence can be selected. And for a length of 6 ~ 8 RB it is possible to choose 2 sequences. In addition, if the length is greater than the length of 9 RB, you can select 3 or more sequences, respectively. In addition, according to one embodiment of the present invention, sequences shorter than 3 RB may be defined differently, e.g. without using the ZC sequence. In this way the number of sequences selected for length 1 RB and for length 2 RB can be determined 1.

[0094] To sum up, according to this embodiment, the number of sequences per group can be determined as described below.

[Equation 16] {1RB, 2RB, 3RB, 4RB, 5RB, 6RB, 8RB, 9RB, 10RB, 12RB, 15RB, 16RB, 18RB, 20RB, 24RB, 25RB.} = {1, 1, 1, 1, 1 , 2, 2, 3, 3, 4, 5, 6, 7,7, 9, 9,}. [0095] Tables 6-8 prepared on this basis show an example of grouping sequences so that each group contains the number of sequences matching with equation 16, and the sequences selected for each group satisfy the condition of high mutual correlation, as stated above.

- 24 Table 6

<td>indium. IN</td><td>3RB</td><td>4RB</td><td>5RB</td><td colspan="2">6RB</td><td colspan="2">8RB</td><td colspan="3">9RB</td><td colspan="3">1CRB</td><td colspan="4">12RB</td><td colspan="6">15RB</td>

- 25 [Table 7]

<td>indium. IN</td><td colspan="6">16RB</td><td colspan="7">18RB</td><td colspan="7">20RB</td>

- 26 [Table 3]

<td></td><td>in</td><td>rt CM</td><td>CM</td><td>oj tt</td><td>WHAT tf</td><td>s</td><td>CM CD</td><td>ABOUT 00</td><td>oo</td><td>cn OJ</td><td>WHAT about</td><td><n about</td><td>CM</td><td>WHAT CM</td><td> 146</td><td>tt</td><td>(D CD</td><td>CD CD</td><td> 184</td><td>ILD What</td><td>TT a></td><td> 212</td><td>rt CM</td><td>rt CM</td><td>CM rt CMII</td>

<td></td><td>What</td><td>UD</td><td>OJ</td><td>tt</td><td></td><td>What</td><td>ABOUT</td><td>OJ</td><td><n</td><td></td><td>about</td><td>h-</td><td>OJ</td><td>CD</td><td> 00</td><td>LD</td><td> 1/</td><td>tt</td><td>CD</td><td>rt</td><td>CMI</td><td>tt</td><td>T</td><td>rt</td><td>ABOUT</td>

<td></td><td>-Ϊ-</td><td></td><td>rt</td><td>rt</td><td>LO</td><td>IC</td><td></td><td></td><td> 00</td><td>OJ</td><td>about</td><td></td><td></td><td>WHAT</td><td>WHAT</td><td>LD</td><td>LD</td><td></td><td></td><td>OJ</td><td>ABOUT</td><td>ABOUT</td><td>CN '</td><td>CM</td><td>tt</td>

<td></td><td>ω</td><td>T</td><td>UD</td><td> 1—</td><td>mt</td><td>about</td><td>What</td><td><n</td><td>CM</td><td> 50</td><td>t</td><td>about</td><td>CD</td><td><n</td><td>LD</td><td>What</td><td>tt</td><td></td><td>What</td><td>CD</td><td>LD</td><td></td><td>tt</td><td>about</td><td>rt</td>

<td></td><td></td><td>axis</td><td>CM</td><td>M =</td><td>tt</td><td>CD</td><td>CD</td><td></td><td> 00</td><td>OJ</td><td>about</td><td>T</td><td>CM</td><td>CM</td><td>tt</td><td>tt</td><td><C</td><td>CD</td><td>What</td><td>WHAT</td><td>cn</td><td>l-</td><td>TT ~</td><td>rt</td><td>rt</td>

<td></td><td>OJ</td><td>CD</td><td>T</td><td>Łd</td><td>Q</td><td>tt</td><td>CD</td><td>rt</td><td> 00</td><td>CM</td><td>T</td><td>CD</td><td>ABOUT</td><td>LO</td><td>cn</td><td>tt</td><td> 00</td><td>WHAT</td><td></td><td>CM</td><td></td><td>LD</td><td>ABOUT</td><td>tf</td><td>OJ</td>

<td></td><td>T-</td><td>T-</td><td>WHAT</td><td>What</td><td>LO</td><td>Li)</td><td>CD</td><td>b-</td><td>oo</td><td>OJ</td><td>about</td><td>t</td><td>CM</td><td>WHAT</td><td>What</td><td>LD</td><td>LD</td><td>Γ-</td><td></td><td>OJ</td><td>about-</td><td>ABOUT</td><td>CM</td><td>CM</td><td>rt</td>

<td>HIM</td><td>r-</td><td>T "</td><td>What</td><td>about</td><td>UD</td><td><n</td><td>tf</td><td> 00</td><td>What</td><td>h-</td><td>· cc</td><td>T</td><td>ID</td><td>about</td><td>tt</td><td><n</td><td>rt</td><td>What</td><td>CM</td><td> 1/</td><td>CD</td><td>ABOUT</td><td>LD</td><td>OJ</td><td>tt</td>

<td></td><td></td><td>CN '</td><td>OJ</td><td>tt</td><td>M "</td><td>ID</td><td>CD</td><td> /</td><td>What</td><td>OJ</td><td>about</td><td>t</td><td>CM</td><td>What</td><td>tt</td><td>tt</td><td>CD</td><td>CD</td><td>WHAT</td><td> 50</td><td>cn</td><td>in-</td><td></td><td>CM</td><td>rt</td>

<td></td><td> ,=</td><td> /</td><td>about</td><td>CD</td><td>cn</td><td>ID</td><td>oo</td><td>tt</td><td>r-</td><td>What</td><td>CM</td><td>ID</td><td></td><td>tf</td><td>ABOUT</td><td>What</td><td>CD</td><td>CM</td><td>WHAT</td><td></td><td>about</td><td><D</td><td>cn</td><td>ID</td><td>oo</td>

<td></td><td></td><td>T</td><td>WHAT</td><td>WHAT</td><td>tt</td><td>ŁD</td><td>CD</td><td></td><td> 00</td><td>OJ</td><td>ABOUT</td><td>T "</td><td>CM</td><td>rt</td><td>tt</td><td>LD</td><td>LD</td><td></td><td></td><td>OJ</td><td>about</td><td>ABOUT</td><td>T-</td><td>CM</td><td>rt</td>

<td></td><td> 00</td><td>ABOUT</td><td> /</td><td>cn</td><td>CD</td><td>What</td><td>LO</td><td></td><td>tt</td><td>CD</td><td>LD</td><td>CM</td><td>tt</td><td></td><td>WHAT</td><td>about</td><td>CM</td><td>cn</td><td></td><td> 00</td><td>r-</td><td>OJ</td><td>CD</td><td> 00</td><td>LD</td>

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<td></td><td>L =</td><td>ol '</td><td>What</td><td>WHAT</td><td>tt</td><td>WHAT</td><td>CD</td><td></td><td> 00</td><td>OJ</td><td>about</td><td>ABOUT</td><td>T</td><td>CM</td><td>WHAT</td><td>tt</td><td>LD</td><td>CD ·</td><td></td><td>What</td><td>What</td><td>OJ</td><td>ABOUT</td><td>CM</td><td>rt</td>

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<td></td><td></td><td>t</td><td>CM</td><td>What</td><td>M-</td><td>CD</td><td>CD</td><td>t</td><td>CC '</td><td> 50</td><td>cn</td><td>'R</td><td>CM</td><td>WHAT</td><td>WHAT</td><td>tt</td><td>LD</td><td>CD</td><td>r-</td><td> 50</td><td>cn</td><td>about</td><td></td><td></td><td>CM</td>

<td></td><td></td><td>ABOUT</td><td>CD</td><td>LD</td><td>tt</td><td>WHAT</td><td>CM</td><td>UD</td><td>tt</td><td>WHAT</td><td>CM</td><td>WHAT</td><td></td><td>CD</td><td>LD</td><td>WHAT</td><td> /</td><td>CD</td><td>LD</td><td></td><td>ABOUT</td><td>ABOUT)</td><td>WHAT</td><td></td><td>ABOUT</td>

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<td></td><td> 00</td><td>H.</td><td>(D</td><td> 00</td><td> /</td><td>CD</td><td>LO</td><td>OJ</td><td></td><td>about</td><td>cn</td><td></td><td>ABOUT</td><td>cn</td><td>What</td><td>LD</td><td>tt</td><td>What</td><td>CM</td><td>tt</td><td>What</td><td>CM</td><td></td><td> 00</td><td></td>

<td></td><td></td><td>ί-</td><td>OJ</td><td>WHAT</td><td>tt</td><td>UD</td><td>CD</td><td>l · -</td><td>CC '</td><td>OJ</td><td>cn</td><td> *—</td><td>CM</td><td>CM</td><td>What</td><td>tt</td><td>ID</td><td>CD</td><td>r * -</td><td>•What</td><td>cn</td><td>ABOUT</td><td>Ί-</td><td>r-</td><td>• CN</td>

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<td></td><td>T</td><td>t</td><td>OJ</td><td>WHAT</td><td>tt</td><td>UD</td><td>CD '</td><td> /</td><td>oo</td><td>OJ</td><td>about</td><td>about</td><td>Λ-</td><td>CN</td><td>rt</td><td>tt</td><td>LD</td><td>CD</td><td>r-</td><td>rt</td><td><n</td><td>ABOUT</td><td>about</td><td>CM</td><td>CM</td>

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<td></td><td></td><td>T</td><td>OJ</td><td>What</td><td>tf</td><td>AT)</td><td>CD</td><td> /</td><td> 00</td><td>OJ</td><td>about</td><td>T</td><td> 5—</td><td>CM</td><td>rt</td><td>tt</td><td>LD</td><td>CD</td><td></td><td>oo</td><td>cn</td><td>about</td><td>T</td><td>T</td><td>CM</td>

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<td>aboutandC</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td>

- 27 (continuation)

<td rowspan="9">η <η cc rt CN</td><td>ABOUT LJD CM</td><td>kO CM</td><td>CD CD CM</td><td>ABOUT r-CM</td><td>OO oo CM</td>

<td>CM CM</td><td>CB rt CN</td><td>5 CN</td><td>00 CN</td><td>about rt CN</td>

<td rowspan="9">£ 0 rr CM</td><td>rt rt CN</td><td>CN CN</td><td>ABOUT WHAT CN</td><td>□> What CN</td><td>rt RCN</td>

<td> §</td><td>ABOUT rt CN</td><td>CN rt CN</td><td>5 CM</td><td>about l · CN</td>

<td>What CM</td><td>What CM</td><td>cn rt CN</td><td>□ About rt CN</td><td>r-. r-. CN</td>

<td>ABOUT T CM</td><td>WHAT "Mr. CM</td><td>00 ln CM</td><td>CM WHAT CM</td><td>r> CM</td>

<td>indium. grup.3RB</td><td>CD CM</td><td>HCM</td><td>WHAT CN</td><td>cr> CN</td><td>ABOUT WHAT</td>

[0096] Similar to Tables 1 ~ 5, Tables 6-8, 1 RB and 2 RB sequences are not shown because 1 RB and 2 RB sequences are defined differently.

[0097] In another embodiment of the present invention, the maximum number of sequences per group can be determined in advance for various reasons. Tables 9 and 10 below show an example of the case where the maximum number of sequences per group is limited to 5 sequences.

[Table 9]

<td colspan="2">indium. IN</td><td>3RB</td><td>4 RB</td><td>5 RB</td><td colspan="2">6RB</td><td colspan="2">8RB</td><td colspan="3">9RB</td><td colspan="3">I0RB</td><td colspan="4">I2RB</td><td colspan="6">15RB</td>

- 29 [Table 10]

<td>indium. groups based on 3 RB</td><td></td><td></td><td></td><td>I6RB</td><td></td><td></td><td></td><td></td><td>I8RB</td><td></td><td></td><td></td><td></td><td>20RB</td><td></td><td></td><td></td><td></td><td colspan="2">24R0</td><td></td><td></td><td></td><td></td><td colspan="2">25RBs</td><td></td><td></td><td></td>

<td colspan="2">about</td><td> 99</td><td> 98</td><td>IW</td><td> 97</td><td> 101</td><td> 109</td><td> 108</td><td> 110</td><td> 10?</td><td>III</td><td> ,23</td><td> 124</td><td> 122</td><td> 125</td><td> 2,</td><td> 146</td><td></td><td> 47</td><td> 145</td><td> 148</td><td> ,44</td><td> 151</td><td> 152</td><td>15Q</td><td></td><td> 53</td><td colspan="2"> 149</td>

<td colspan="2"> 28</td><td colspan="28">IfflftżlIKlIUlliflinilEilliźliraiFHHFlHHRHHllHrtFłriKaeflKlRilKSlEilKźircSłTii</td>

[0098] And, in another example, the maximum number of sequences can be set to 4 in advance. This case is illustrated in Tables 11 and 12 below.

- 30 [Table 11]

<td>indium. groups, based on 3 RB</td><td>3RB</td><td>4RB</td><td colspan="2">5RB</td><td colspan="2">6RB</td><td colspan="2">8RB</td><td colspan="3">9RB</td><td colspan="3">I0RB</td><td colspan="4">12RB</td><td colspan="4">15RB</td>

- 31 [Table 12]

<td>indium. groups, based on 3 RB</td><td></td><td colspan="2">16RB</td><td></td><td></td><td colspan="2">18RJB</td><td></td><td></td><td colspan="2">20 RB</td><td></td><td></td><td colspan="2">24RB</td><td></td><td></td><td colspan="2">25RBs</td><td></td>

[0099] In another example, the maximum number of sequences can be set to 3 in advance. This case is illustrated in Tables 13 and 14 below.

- 32 [Table 13]

<td>indium. groups based on 3 RB</td><td></td><td colspan="2">3RB</td><td colspan="2">DRB</td><td>5RB</td><td colspan="2">6RB</td><td colspan="2">IR li</td><td></td><td>9RB</td><td></td><td></td><td>10RB</td><td></td><td></td><td>12RB</td><td></td><td></td><td>ISRB</td><td></td><td></td><td colspan="2">I6RS</td><td></td><td></td><td>I8RB</td><td></td>

[Table 14]

<td>indium. groups, based on 3 RB</td><td colspan="3">20RB</td><td colspan="3">24RB</td><td colspan="3">25RBS</td>

- 33 (continuation)

<td>indium. groups, based on 3 RB</td><td colspan="3">20RB</td><td colspan="3">24RB</td><td colspan="3">25RBs</td>

[0100] In another example, the maximum number of sequences can be set to 2 in advance. This case is illustrated in Tables 15 and 16 below.

- 34 [Table 15]

<td>indium. groups, based on 3 RB</td><td>3RB</td><td>4RB</td><td>5 RB</td><td colspan="2">6RB</td><td colspan="2">8RB</td><td colspan="2">9RB</td><td colspan="2">10RB</td><td colspan="2">12RB</td><td colspan="2">15RB</td>

(continuation)

<td>indium. groups, based on 3 RB</td><td>3RB</td><td>4 RB</td><td>5RB</td><td colspan="2">6RB</td><td colspan="2">8RB</td><td colspan="2">9RB</td><td colspan="2">10RB</td><td colspan="2">12RB</td><td colspan="2">15RB</td>

- 35 [Table 16]

(continuation)

[0101] In another example, the maximum number of sequences can be predetermined to 1. This case is shown in Table 17 below.

[Table 17]

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<td>en er m</td><td>ABOUT) Nt</td><td>in</td><td>What n</td><td>n m</td><td>rin</td>

<td>en er What</td><td><a CN</td><td>RCN</td><td>What CN</td><td>σ CN</td><td>ABOUT WHAT</td>

<td>ind.grup.3RB</td><td>What CN</td><td>RCN</td><td>What CN</td><td>σ CN</td><td>about WHAT</td>

[0102] Given the complexity of the configuration and the flexibility to support the UE's use of the variable length reference signal sequence, in one embodiment of the present invention it is proposed to implement the grouping such that each group contains one base sequence of each length corresponding to a length of 1 to 5 RB and two basic sequences of each length corresponding to a length of 6 RB or more. This corresponds to tables 15 and 16.

[0103] The basic sequence here means the ZC sequence indicated by the main index, and used to perform a cyclic shift corresponding to different cyclic shift values. In this case, the basic sequence with cyclic shift can be used as the reference signal sequence.

[0104] The above tables 1-17 show the case when the main index (main indexes) is selected using the word (s1 / N1 - s2 / N2). In contrast, in another embodiment of the present invention, the main index (s) can be selected by calculation

- 38 actual value of cross-correlation. Tables 18-20 below correspond to Tables 6-8, but the main indexes are selected by calculating the actual value of mutual correlation.

- 39 [Table 19]

<td> 14</td><td> 86</td><td> 160</td><td> 182</td><td> 87</td><td> 10</td><td> 48</td><td> 95</td><td> 201</td><td> 25</td><td> 96</td><td> 11</td><td> 166</td><td> 180</td><td> 108</td><td>JO7</td><td> 109</td><td>Ififi</td><td> 228</td><td> 48</td><td> 168</td>

- 40 [Table 20]

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[0105] In this case, when the maximum number of sequences in each group is set to 5 in advance, the grouping can be performed as shown in the following tables 21 and 22. Tables 21-22 also correspond to the case when the basic sequences are selected by calculating real mutual correlation.

[Table 21]

[Table 22]

<td> 1</td><td></td><td colspan="3">U21KdBU</td><td> 7</td><td>Π2</td><td></td><td></td><td>ιόν</td><td> 49</td><td> 8</td><td> ^7</td><td> (6?</td><td>Τ2Γ</td><td> 87</td><td> 9</td><td> 151</td><td>ISO</td><td>Τω</td><td> 89</td><td></td><td colspan="4">011 minor 1J0Ż49</td>

[0106] In another example, if the maximum number of sequences for each group is set to 4 in advance, the grouping can take place as shown in Tables 23 and 24 below. Tables 23 and 24 also correspond to the case when the basic sequences are selected by calculation of actual mutual correlation.

[Table 23]

[Table 24]

[0107] In another example, if the maximum number of sequences for each group is set to 3 in advance, the grouping can take place as shown in the following Tables 25 and 26. Tables 25 and 26 also correspond to the case when the basic sequences are selected by calculating real mutual correlation.

[Table 25]

[Table 26]

(continuation)

[0108] In another example, if the maximum number of sequences for each group is set to 2 in advance, the grouping can take place as shown in the following table 27. Table 27 also corresponds to the case where the basic sequences are selected by calculating the actual inter-correlation.

[Table 27]

<td> 11</td><td> 11</td><td> 1</td><td> 21</td><td>AT</td><td> 25</td><td> 72</td><td> 2</td><td> 3?</td><td> (02</td><td> 40</td><td> 78</td><td> 119</td><td> 3</td><td> 64</td><td> 153</td><td> 68</td><td> 67</td><td>behind</td><td> 74</td><td colspan="2"> 85</td><td> 204</td><td> 242</td><td>] 9J</td><td>IW</td><td>? V</td>

[0109] In another example, if the maximum number of sequences for each group is set to 1 in advance, the grouping can take place as shown in the following table 28. Table 28 also corresponds to the case where the basic sequences are selected by calculating the actual inter-correlation .

[Table 28]

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(continuation)

<td>ω CG <r iO OJ</td><td>CD ace</td><td>r-b CN</td><td>CD LiS CN</td><td>"ł (ABOUT CN</td><td>L RCN</td>

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<td>X tr ΙΛ</td><td>about LO</td><td>this LO</td><td>LD CD</td><td>00 r-</td><td>CD K</td>

<td>WHAT ai CN</td><td>RTF</td><td>CN</td><td>LO LO</td><td>about CD</td><td>LO WHAT</td>

<td>(D tr about</td><td>US ace</td><td>CD CM</td><td>CN ABOUT</td><td>σι tf</td><td>tt CD</td>

<td>ca CL axis</td><td>ld LO</td><td>WHAT GD</td><td> 5</td><td>about about</td><td>ABOUT LD</td>

<td>WHAT CL ΙΛ</td><td>ABOUT CM</td><td>CN CN</td><td>CD LO</td><td>WHAT</td><td>LD ul</td>

<td>ca CL What</td><td>LD CM</td><td>HCM</td><td>00 CM</td><td>WHAT CM</td><td>ABOUT CD</td>

<td>ind.gr. 3 RB</td><td>LO CM</td><td>K CN</td><td>WHAT CMI</td><td>ace CN</td><td>ABOUT CD</td>

[0110] In the above cases, the tables can be reorganized according to the allocated number of sequences for each group and each length.

[0111] In another embodiment of the present invention, the above tables can be extended to a length of 100 RB, and the following tables show this example. In this example, the maximum number of main index (v) for a length of 5 RB or less is set to 1, and the maximum number of main index (v) for a length of more than 5 RB is set to 2.

[Table 29]

<td></td><td>max. homepage. on RB</td><td> 1</td><td> 1</td><td> 1</td><td colspan="2"> 2</td><td colspan="2"> 2</td><td colspan="2"> 2</td><td colspan="2"> 2</td><td colspan="2"> 2</td><td colspan="2"> 2</td>

(continuation)

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continuation)

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<td>about</td><td>about</td><td>f-</td><td>ΙΛ</td><td>WHAT</td><td>ABOUT</td><td>QC</td><td>cb</td><td>tt</td><td>T</td>

<td></td><td></td><td>h-</td><td>CD</td><td>CD</td><td>ABOUT</td><td>ABOUT</td><td> <—</td><td>CM</td><td>What</td>

<td>V-</td><td>CJ</td><td>this</td><td>TT</td><td> 1-</td><td>this</td><td>WHAT</td><td>ABOUT</td><td>WHAT</td><td>ŁD</td>

<td></td><td>TT</td><td>ul</td><td>CD</td><td>r-</td><td></td><td>cc</td><td>CD</td><td>CD</td><td>ABOUT</td>

<td>ABOUT</td><td>ABOUT</td><td>Γ-</td><td>WHAT</td><td>ABOUT</td><td>r-</td><td>tf</td><td></td><td>r-</td><td>tf</td>

<td></td><td>ul</td><td>m</td><td>CD</td><td>r-</td><td> 0-</td><td> 03</td><td>axis</td><td>σι</td><td>about</td>

<td>ABOUT</td><td><D</td><td>CM</td><td>OO</td><td>tt</td><td>ABOUT</td><td>CD</td><td>What</td><td>cn</td><td>IIi</td>

[Table 31]

<td>CD</td><td>£ K-</td><td>CM</td><td>about</td><td>OJ LD OJ</td><td>about ld en <r</td><td><D K D " ABOUT-</td><td>cn 05 00 cn</td><td>ol ol CD ol</td><td>What T RTF</td><td>r * Ol h »</td><td>r · - 05 CD 05</td><td>about <N OJ CM</td><td><D ol LD bottom</td><td>r> Ol about h04</td><td>M 05 CM LFL Φ CM</td><td>ABOUT OJ ol ol What</td><td>WHAT 't What M-mr WHAT</td><td>05 <D WHAT eo ΐθ <a</td><td>ol □ 5 WHAT What eo</td><td>00 5 K mT</td><td>T ^ r CM mr</td><td>NCD 'L CD CD D-</td><td>about cn ^ r 5? Μ-</td><td>ID LD CD ID</td>

<td></td><td></td><td></td><td></td><td></td><td rowspan="2"> 1^</td><td rowspan="3">cn What</td><td rowspan="3">ABOUT* ABOUT</td><td>CD</td><td>ABOUT</td><td>CD</td><td>LD</td><td>What</td><td></td><td>CD</td><td>cn</td><td></td><td></td><td>h ~</td><td>oh</td><td>lf?</td><td>op</td><td>ABOUT</td><td>What</td><td> 00</td>

<td></td><td></td><td></td><td>τ-</td><td rowspan="2">ol</td><td> 1—</td><td>M-</td><td>WHAT</td><td>WHAT</td><td>about</td><td>eo</td><td>LP</td><td>r-</td><td>about</td><td>CM</td><td></td><td>Γ "~</td><td>en</td><td>T</td><td></td><td>WHAT</td><td> 00</td>

<td></td><td>ol</td><td></td><td></td><td rowspan="3">WHAT OJ</td><td rowspan="2"><D</td><td></td><td rowspan="3">CD cn</td><td>Φ</td><td>ABOUT</td><td>ol</td><td>CD</td><td>cn</td><td>oi</td><td>Lf)</td><td> 00</td><td>ol</td><td>lft</td><td>GC</td><td></td><td> 3·</td><td>at-</td><td></td><td>df</td><td>n</td>

<td rowspan="2">LD</td><td>T</td><td>OJ</td><td>about</td><td></td><td></td><td>ro</td><td>CD</td><td> 00</td><td>about</td><td><a</td><td>in</td><td>c-</td><td>about</td><td>ol</td><td>M-</td><td>r-</td><td>σ?</td><td>T</td><td></td><td>WHAT</td><td>he</td>

<td></td><td></td><td></td><td></td><td></td><td></td><td rowspan="3">OJ WHAT</td><td></td><td>LD</td><td>LC</td><td>ABOUT-</td><td>CD</td><td>ih-</td><td>□ ΰ-</td><td>Oi</td><td></td><td>ol</td><td>What</td><td>^ L</td><td>ro</td><td></td><td>LD</td><td>CD</td><td>What</td><td>ol</td>

<td></td><td></td><td></td><td>Λ-</td><td rowspan="2">ol</td><td></td><td rowspan="2">oo</td><td>ABOUT</td><td>oj</td><td></td><td>CD</td><td>oo</td><td>ABOUT</td><td>ol</td><td>LC</td><td>h-</td><td>Oi</td><td>Λ-</td><td>r0</td><td>Lf?</td><td>J--</td><td>Φ</td><td>and-</td><td>ro</td>

<td></td><td> 11^</td><td></td><td></td><td></td><td rowspan="2">ol</td><td rowspan="3">CD CD</td><td rowspan="3">CD WHAT</td><td>tT</td><td>LC</td><td>CD</td><td>l · -</td><td>WHAT</td><td>D></td><td>about</td><td>ABOUT</td><td>> T_</td><td>CM</td><td>WHAT</td><td></td><td>UD</td><td>£ D</td><td>r * -</td><td>ABOUT-</td><td> 00</td>

<td rowspan="2"></td><td rowspan="2"> 3</td><td>OJ</td><td>ABOUT</td><td rowspan="2">OJ</td><td>ABOUT</td><td>ol</td><td>"^ T</td><td>CD</td><td>What</td><td>ABOUT</td><td>CD</td><td>Lf?</td><td>r-</td><td>cn</td><td></td><td>CD</td><td>LD</td><td>r-</td><td> 05</td><td>T</td><td>ro</td>

<td></td><td></td><td></td><td></td><td></td><td rowspan="3">What ro</td><td></td><td rowspan="2"> 00</td><td rowspan="3"><O cn</td><td>LC</td><td>eo</td><td>EF</td><td><D</td><td>M "</td><td>OJ</td><td></td><td>OJ</td><td>about</td><td> 05</td><td>ABOUT</td><td>ol</td><td>r-</td><td>What</td><td>r-</td><td>id</td>

<td></td><td></td><td></td><td></td><td rowspan="2">ol</td><td rowspan="2">id</td><td></td><td>ro</td><td>lD</td><td>AT-</td><td> 05</td><td></td><td>What</td><td>Lf)</td><td>r-</td><td>oo</td><td>in-</td><td>CM</td><td></td><td>CD</td><td>What</td><td>ABOUT</td>

<td></td><td> 05</td><td></td><td></td><td rowspan="2">σι</td><td rowspan="3">CD ro</td><td rowspan="3">WHAT id</td><td></td><td></td><td>CD</td><td>LO</td><td>LD</td><td></td><td>id</td><td>eo</td><td>CM</td><td></td><td></td><td>ABOUT</td><td>en</td><td>OO</td><td>eo</td><td></td><td><D</td><td><D</td>

<td rowspan="2"> §</td><td>ol</td><td>OJ</td><td>about</td><td></td><td rowspan="2">σι</td><td></td><td>CD</td><td>lD</td><td>K</td><td> 05</td><td></td><td>What</td><td>'Lf?</td><td>Γ--</td><td> 05</td><td>about</td><td>ol</td><td></td><td>CD</td><td>c0</td><td>ABOUT</td>

<td></td><td></td><td></td><td></td><td rowspan="2">σι</td><td rowspan="3">What ro</td><td rowspan="3">WHAT ID</td><td rowspan="2">cD</td><td rowspan="3">CD σ?</td><td>ABOUT</td><td>WHAT</td><td> 00</td><td>ld</td><td>LD</td><td>ol</td><td>CM</td><td>about</td><td>h-</td><td>Γ--.</td><td>M-</td><td>D-</td><td></td><td> <55</td><td>ABOUT?</td><td>at?</td>

<td></td><td></td><td></td><td>t</td><td>τ-</td><td>OJ</td><td>M-</td><td>CD</td><td>WHAT</td><td>about</td><td>CM</td><td>'and</td><td>UD</td><td> 1^</td><td>cn</td><td></td><td>ro</td><td>D-</td><td>CD</td><td> 00</td>

<td> 00</td><td></td><td>OJ</td><td>about</td><td>What</td><td></td><td>UD</td><td>M</td><td>oh</td><td> -</td><td>σι OJ</td><td>ht</td><td><D thighs</td><td> 3</td><td>cD ABOUT</td><td>CM</td><td>22 What</td><td>eo LD</td><td>f £</td><td>S en</td><td>CD</td><td> 8</td><td>s</td><td>eg CD</td><td>fe</td>

<td></td><td></td><td></td><td></td><td rowspan="2">What</td><td rowspan="2">WHAT WHAT</td><td></td><td rowspan="2">oo CD</td><td rowspan="2">UD 00</td><td> 04</td><td>cn</td><td>tf</td><td></td><td>What</td><td>m</td><td>WHAT</td><td>about</td><td>r-</td><td></td><td> 05</td><td>eo</td><td>eo</td><td>ABOUT</td><td>What</td><td>LD</td>

<td></td><td></td><td></td><td> 1—</td><td>lf?</td><td>ABOUT</td><td>T</td><td>ro</td><td>UD</td><td>CD</td><td>What</td><td>about CM</td><td>ol OJ</td><td>eo ol</td><td>LFL CM</td><td>tD ol</td><td>WHAT CMI</td><td>about What</td><td>CM CD</td><td>eo eo</td><td>LD ro</td>

<td rowspan="2">LD</td><td>What</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>WHAT</td><td>Lf?</td><td>OJ</td><td> 05</td><td>WHAT</td><td>CM</td><td>cn</td><td>CD</td><td>eo</td><td>ABOUT</td><td>r * u</td><td>'T</td><td></td><td>about-</td><td>D '</td>

<td>04 UD</td><td>OJ</td><td>about</td><td></td><td>WHAT</td><td>UD</td><td><a</td><td>eo</td><td>ABOUT</td><td></td><td>WHAT</td><td>m</td><td>CD</td><td>What</td><td>ABOUT ol</td><td>he</td><td>eo CM</td><td>ID CM</td><td>RCM</td><td>cc CM</td><td>about What</td><td>CMI CD</td><td>eo What</td><td>LD ro</td>

<td></td><td></td><td></td><td></td><td rowspan="2">What</td><td></td><td></td><td></td><td rowspan="2">oo</td><td rowspan="3">OJ cn</td><td>5i</td><td>ro</td><td>about</td><td></td><td>ol</td><td>CD</td><td>about</td><td>r-</td><td></td><td> □0</td><td>CM</td><td>Φ</td><td>ro</td><td>ABOUT</td><td>LD</td>

<td></td><td></td><td></td><td>τ-</td><td rowspan="2">What</td><td></td><td rowspan="2"><D</td><td>ABOUT</td><td>oh</td><td>tt</td><td>LD</td><td>this</td><td>□ About</td><td>about</td><td>n</td><td><O</td><td>M-</td><td>CD</td><td>r-</td><td>a></td><td>t</td><td>CM</td>

<td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>CM</td><td>About |</td><td>C \ J</td><td>OJ</td><td>CM</td><td>oh</td><td>ol</td><td>WHAT</td><td>eo</td>

<td></td><td>Oi</td><td></td><td></td><td rowspan="2">id</td><td></td><td rowspan="2">CD</td><td rowspan="3">ol CD</td><td></td><td rowspan="3">tD Φ</td><td>What</td><td></td><td>Φ</td><td>LD</td><td>about</td><td>id</td><td>T</td><td>CD</td><td>ABOUT</td><td> 1^</td><td>WHAT</td><td>eo</td><td></td><td>ol</td><td>M-</td>

<td></td><td>h-</td><td>OJ</td><td>ABOUT</td><td rowspan="2">What</td><td></td><td>ABOUT</td><td>OJ</td><td>ro</td><td>id</td><td>r-</td><td>□ About</td><td>about</td><td>t</td><td>EO</td><td></td><td>CD</td><td>AT-</td><td> 05</td><td>ABOUT</td><td>tM</td>

<td></td><td>'ϊ</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>ol</td><td>ol</td><td><M</td><td>About |</td><td>CM</td><td>OJ</td><td><M</td><td>What</td><td>eo</td>

<td></td><td></td><td></td><td> -</td><td>CD</td><td>rO!</td><td></td><td>Lf? WHAT</td><td>σι this</td><td>'t 00</td><td>WHAT cn</td><td>OJ</td><td>CD OJ</td><td>about 'ΤΓ</td><td>oi lf?</td><td>CD CD1</td><td>about oo</td><td>tt 0i</td><td>GC ABOUT about</td><td>eD CM cm</td><td>CD N</td><td>LD CM</td><td>LD CD ol</td><td>σι CM</td><td>05 ΓΜ</td>

<td>CD oo</td><td> £</td><td>OJ</td><td>about</td><td>or</td><td>WHAT oi</td><td>OJ M "</td><td>CD HO</td><td>about r-</td><td><a X</td><td>K cn</td><td> £</td><td>Lf? OJ</td><td>05 ro</td><td>WHAT Lf?</td><td>SCD</td><td> 5</td><td>LD 05</td><td>σ> about CM</td><td>ol CM OJ</td><td>CD CD CM</td><td>ABOUT LD CM</td><td>CD Oi</td><td>oo OCM</td><td>CM 05 CM</td>

<td>T =</td><td>CM</td><td></td><td>about</td><td>T =</td><td>OJ</td><td> 00</td><td></td><td>LC</td><td>What</td><td>r-</td><td>eo</td><td> 05</td><td>about</td><td></td><td>ol</td><td>eo</td><td>M-</td><td>LD</td><td>CD</td><td>ABOUT-</td><td>WHAT</td><td>CD</td><td>ABOUT dl</td>

(continuation)

<td></td><td></td><td>tt</td><td>Q</td><td>CD</td><td>ABOUT</td><td>CM</td><td>WHAT</td><td></td><td>r-</td>

<td></td><td>about</td><td>X</td><td>di</td><td>tf</td><td> 00</td><td>CD</td><td>h-</td><td>(N</td><td><P</td>

<td>about</td><td>tf</td><td>CD</td><td>CC</td><td>in-</td><td>CD</td><td>CD</td><td>X</td><td>l-</td><td>X</td>

<td></td><td></td><td>tf</td><td>CD</td><td>en</td><td>tf</td><td>r-</td><td>about</td><td>CM</td><td>ABOUT</td>

<td></td><td>T</td><td>CD</td><td>x</td><td> 1-</td><td>about</td><td>CN</td><td>m</td><td>r-</td><td>Oi</td>

<td></td><td>x</td><td>X</td><td>about</td><td>id</td><td>cp</td><td>tp</td><td>UJ</td><td>UJ</td><td>(D</td>

<td></td><td>about</td><td>CD</td><td>r *.</td><td>about</td><td>X</td><td>CD</td><td>axis</td><td>X</td><td>X</td>

<td>about</td><td>and-</td><td>CD</td><td>LO</td><td>CQ</td><td>ABOUT</td><td>N</td><td>tf</td><td>r-</td><td>ol</td>

<td></td><td>ABOUT</td><td>ID</td><td>x</td><td>LD</td><td>CD</td><td>CD</td><td>X</td><td>X</td><td>X</td>

<td></td><td>ABOUT</td><td></td><td>about</td><td></td><td>CM</td><td>CD</td><td>LD</td><td>X</td><td></td>

<td>τ--</td><td>X</td><td> 30</td><td>about</td><td>CM</td><td></td><td>CD</td><td>X</td><td>about</td><td>CM</td>

<td></td><td>ch</td><td>ABOUT</td><td> =__</td><td>CN</td><td>CD</td><td>tf</td><td>tf</td><td>about</td><td>CD</td>

<td>about</td><td>ID</td><td>XI</td><td>ABOUT</td><td>CM</td><td>tf</td><td>CD</td><td>X</td><td>about</td><td>CM</td>

<td></td><td>X</td><td>id</td><td>X</td><td>tT</td><td>CD</td><td></td><td>CM</td><td></td><td>ABOUT)</td>

<td></td><td>ABOUT</td><td>'Tt</td><td>tf</td><td>CD</td><td>CM</td><td>CM</td><td></td><td>about</td><td>about</td>

<td>about</td><td>CM</td><td>tt</td><td>CD</td><td>X</td><td>ABOUT</td><td>CMI</td><td>TT</td><td>X</td><td>X</td>

<td></td><td>tt</td><td>tf</td><td>tf</td><td>tf</td><td>UD</td><td>LO</td><td>about</td><td>ABOUT</td><td>about</td>

<td>T--</td><td>about</td><td>CM</td><td>tf</td><td>CD</td><td>· h-</td><td>σ></td><td>l-</td><td>X</td><td>ABOUT</td>

<td></td><td>tt</td><td>tt</td><td>tf</td><td>DT</td><td>tf</td><td>tf</td><td>LD</td><td>LD</td><td>ABOUT</td>

<td></td><td>Ld</td><td>tf</td><td>IN</td><td>ABOUT</td><td>en</td><td>h-</td><td>UJ</td><td>tf</td><td>X</td>

<td>about</td><td>about</td><td>CM</td><td>tf</td><td>CD</td><td>r-</td><td>axis</td><td></td><td>X</td><td>LD</td>

<td></td><td>CM</td><td>ch</td><td>tf</td><td></td><td>CD</td><td>ABOUT</td><td>CD</td><td>ABOUT</td><td>r-</td>

<td>T =</td><td>N</td><td> 00</td><td>about</td><td>CM</td><td>CD</td><td>ABOUT</td><td>r-</td><td>Axis</td><td>about</td>

<td>ABOUT</td><td>l · -</td><td>XI</td><td>about</td><td>CM</td><td>CD</td><td>ABOUT</td><td></td><td>X</td><td>about</td>

<td></td><td>ol</td><td>CD</td><td>about</td><td> 1-</td><td></td><td> □0</td><td>OJ</td><td>AXIS</td><td>X</td>

<td>τ-</td><td>X</td><td>X</td><td>h-</td><td>What</td><td>ABOUT</td><td>τ-</td><td>X</td><td>tf</td><td>CD</td>

<td></td><td>ABOUT</td><td>ID</td><td></td><td>X</td><td>CM</td><td>h-</td><td>X</td><td>X</td><td>tf</td>

<td>ABOUT</td><td>tt</td><td>LD</td><td>h-</td><td> 03'</td><td>ABOUT</td><td>T =</td><td>X</td><td>tf</td><td>X</td>

<td></td><td>ID</td><td>cn</td><td>CD</td><td>r-</td><td>CM</td><td>CD</td><td>ABOUT</td><td>tf</td><td>X</td>

<td>RT ·</td><td>about</td><td></td><td>CD</td><td>tf</td><td>CD</td><td>about.</td><td>Axis</td><td>about</td><td></td>

<td></td><td>WHAT</td><td>about</td><td>tf</td><td>in</td><td></td><td>LO</td><td>ace</td><td>X</td><td>f-</td>

<td>about</td><td>CJ</td><td>CN</td><td>CD</td><td>tf</td><td>these</td><td>r-</td><td>OJ</td><td>t_)</td><td></td>

[Table 32]

[0112] Based on these concepts, the invention provides a method of generating reference signal sequences using ZC sequences as described below.

[0113] To generate a reference signal sequence, one embodiment of the present invention defines a specific base sequence for performing cyclic shift. In this embodiment, the basic sequence is defined using the ZC sequence at the specified main index (designated "q" hereinafter). Here, this particular base sequence is selected from base sequence groups, and each base sequence group contains base sequences with a high mutual correlation value, as stated above. So, if it is necessary to select a specific base sequence with the index "q", "q" should be selected taking into account the group index (hereinafter "u") and the index of the number of base sequence within each group (hereinafter "v" "). This means that "q" should be a function of "u" and "v".

[0114] In addition, after selecting a specific base sequence with a main index "q", it is possible to apply variable cyclic shift values to the selected base sequence.

[0115] For a more specific consideration of the relationship between "q", "u" and "v", "q" can be obtained by using the equations below. The following equations 17 and 18 are used to select the index "q" that satisfies the condition that the word (s1 / N1 - s2 / N2) becomes close to zero.

[Equation 17]

[Equation 18]

CC [0116] here is the target length of the ZC sequence used to generate the q-th main sequence ZC, and is determined by the largest prime number that is smaller than the sequence size of the respective reference signal. This means that the reference sequence is generated by cyclic extension.

[0117] Instead, it is the length given by the largest prime number that is smaller than the size of the reference sequence, for example, the length of 3 RB. If the basis for grouping is afterlongerg3 RB this is 31. "Round (z)" is a function of rounding to the nearest integer nearest to z, and "floor (z)" is the function giving the largest integer not greater than z.

[0118] According to another embodiment of the present invention, if the ZC sequence is generated based on a clipping method, it can be determined by the smallest prime number that is larger than the sequence size of the respective reference signal. And in this case it can have the length given by the smallest prime number that is greater than the size of the reference sequence, for example, the length of 3 RB. If the basis for grouping is 3 afterRB maybe inswear 37.

[0119] According to equations 17 and 18, the "m" -th element "q" of the ZC sequence (xq (m)) can be expressed as shown below.

[Equation 19]

[0120] Because "round (y)" and "floor (y + 0.5)" are actually equivalent, equations 17 and 18 have the same meaning. In equations 17 and 18, the expression (-1)floor (round (s))means that if "y" has a value of 0.5 or greater in its decimal value after the decimal point, then (-1)floor (round (y) -y) can be calculated as "1", and if "y" has a value less than 0.5 in its decimal value after the decimal point, then (-1)floor (round (y) -y) may be calculated as "-1". So (-1)floor (round (y) -y) can be replaced by (-1)floor (y-round (y)) + 1 or other equivalent expressions having the same meaning.

[0121] In the above examples, when the grouping is performed for a length greater than 3 RB, based on the length of 3 RB, and when the ZC sequence is generated based on the method of cyclic extension, it can be 31. However, when the ZC sequence is generated in based on the cutting method, it can be 37. And if the grouping is performed for a length greater than the length of 4 RB, based on the length of 4 RB, and when the ZC sequence is generated based on the method of cyclic extension, it can be 47.

after

Also, when the ZC sequence is generated based on the clipping method, it can be 49 and it is easy to apply it to grouping based on another length.

[0122] The above tables can be determined by using equations 17 and 18. The following examples include part of the main index selection procedure according to equations 17 and 18 [0123] First, if Nreference, zc = 31, then the first group selection method ("u" = 0) when 1) NZC = 47, 2) NZC = 71, 3) NZC = 211 is as described below. In the following examples, equation 18 is used.

1) Nreference, zc = 31, NzcRS= 47, u = 0, v = 0; y = 47/31,

So for the length of 4 RB, the first base sequence number (v = 0) in the first group (u = 0) is 2 (q = 2).

2) Nreference, zc = 31, NzcRS= 71, u = 0, v = 0; y = 71/31,

So for the length of 6 RB, the first base sequence number (v = 0) in the first group (u = 0) is 2 (q = 2).

3) Nreference, zc = 31, NzcRS= 211, u = 0, v = 0; y = 211/31.

[0124] Thus, for the length of 18 RB, the first base sequence number (v = 0) in the first group (u =

0) is 7 (q = 7).

[0125] In the above cases, the selected main indexes (q) are consistent with the data in tables 6-8 which are generated based on the length of 3 RB.

[0126] In another example, if Nreference, zc = 47 (based on the length of 4 RB), then the method for selecting the second group ("u" = 1) when 1) NZC = 59, 2) NZC = 107 3), NZC = 139 is as described below.

In the following examples, equation 18 is used.

1) Nreference, zc = 47, NzcRS= 59, u = 1, v = 0; y = 59/47 * 2,

So at 5RB, the first base sequence number (v = 0) of the second group (u = 1) is (q = 3).

2) Nreference, zc = 47, NzcRS= 107, u = 1, v = 0; y = 107/47 * 2,

Thus, with a length of 9 RB, the first base sequence number (v = 0) in the second group (u = 1) is (q = 5).

3) Nreference, zc = 47, NzcRS= 139, u = 1, v = 0; y = 139/47 * 2,

Thus, with a length of 12 RB, the first base sequence number (v = 0) in the second group (u = 1) is 6 (q = 6).

[0127] In another embodiment of the present invention, equations 17 and 18 may be replaced as described below.

[Equation 20] q = rainrf (y) + jtoorf &> * · where - fr *1). ii ε {0,1,. ,,, 29}, ve ίοχ .. Jfcx> r (Nj £ / 30) -l}

-1 ' 7 [Equation 21]

[0128] Because "round (y)" and "floor (y + 0.5)" are actually equivalent, equations 20 and 21 have the same meaning.

[0129] In another embodiment of the present invention, equations 17 and 18 may be replaced as described below.

[Equation 22]

[Equation 23]

[0130] These equations correspond to the different grouping methods explained in relation to the above-mentioned tables.

[0131] If the maximum number of sequences that can be grouped in one group is predetermined in 2, then equations 17-18, 20-21 and 22-23 can be simplified as follows.

[Equation 24]

[Equation 25]

[Equation 26]

[Equation 27]

[Equation 28]

[Equation 29]

[0132] Equations 17-18, 20-21 and 22-23 are used to select the main index ZC such that the condition that the expression (s1 / N1-s2 / N2) becomes close to zero. And equations 24-29 are used to select the main index ZC when the maximum number of sequences per group of each length is limited to 2.

[0133] But for generalized equations, so that the expression (s1 / N1-s2 / N2) is close to a specific value (T), the equations listed below can be used. In this case, the value "T" may be 0, 1/2, -1/2, 1/3, -1/3. The 'T' value may also be different.

[0134] Of the equations below, equations 30 and 31 serve the main index, ZC, when the maximum number of sequences in each length is limited to 2.

[Equation 30]

[Equation 31]

[Equation 32]

[Equation 33]

[0135] It will be apparent to those skilled in the art that the present invention may be implemented in other specific forms without departing from the essential characteristics of the invention. Thus, the above realizations are considered in all respects illustrative and not restrictive. The scope of the invention is defined by the appended claims.

[0136] According to embodiments of the present invention, it is possible to minimize intercellular interference caused by using variable length sequences. And, if each grouped base sequence is assigned to a specific cell or node B, UE devices can use variable length sequences as a reference signal.

[0137] These methods are suitable for use in the 3GPP LTE (3rd Generation Partnership Project Long Term Evolution) system. However, it is understood by those skilled in the art that these methods can be applied to any wireless communication system using different length sequences as reference signal sequences.

[0138] Although illustrative preferred embodiments of the invention have been disclosed, it is obvious to those skilled in the art that various modifications, substitutions, and additions are possible without departing from the scope of the invention as defined in the appended claims.

LIST OF EXAMPLES FOR THE SUBJECT OF THE INVENTION [0139]

1. A method of grouping a sequence of variable length corresponding to the size of a resource block or a multiple thereof, the method includes:

grouping the sequence into groups, such that each group contains at least one sequence of any length, wherein the grouped sequence is the basic sequence that is used to perform the cyclic shift corresponding to the variable value of the cyclic shift, and the basic sequence with this cyclic shift is used as reference signal sequence.

2. The method of example 1, wherein the number of groups is 30.

3. The method of Example 2, wherein said grouping is performed such that each group contains one basic sequence of each length corresponding to 1 to 5 resource block sizes, and two basic sequences with a length equal to 6 or more resource block sizes.

4. The method of example 3, wherein a basic sequence with a length corresponding to at least 3 times the size of the resource block is defined using the Zadoff Chu (ZC) sequence, and a basic sequence with a length corresponding to 1 or 2 times the size of the resource block is defined using the sequence other than the ZC sequence.

5. The method of Example 1, wherein the resource block size corresponds to the size of 12 subcarriers in the frequency domain.

6. A method of generating a reference signal sequence, the method comprising:

defining one or more basic sequences of variable length corresponding to the size of the resource block or its multiples;

applying to the defined basic sequence a cyclic shift corresponding to the variable value of the cyclic shift, wherein the basic sequences are divided into groups, each of which consists of at least one basic sequence of any length.

7. The method of Example 6, wherein the basic sequence is defined by cyclic extension of the ZC sequence with a length (W ™) given by the largest prime number that is smaller than the size of the corresponding reference signal sequence.

8. The method of Example 6, wherein the basic sequence is defined by truncation

CO of the ZC sequence with the length (W ™) given by the smallest prime number that is larger than the size of the corresponding reference signal sequence.

9. The method of example6, wherein the number of groups is 30.

10. The method of Example 9, wherein each group contains one basic sequence of 1 to 5 resource block sizes and two basic sequences of 6 or more resource block sizes.

11. The method of Example 10, wherein a basic sequence with a length corresponding to at least 3 resource block sizes is defined using Zadoff-Chu (ZC) sequence with a specific ZC sequence index (q) and a basic sequence with a length corresponding to 1 or 2 resource block sizes is defined by a sequence other than the ZC sequence.

12. The method of Example 11, wherein the specific ZC sequence index (q) is a function of the group index (u) and the primary sequence number index within the group (v).

13. The method of Example 12, wherein the defined cyclic shift base sequence is used as the reference signal sequence in the uplink.

14. The method of Example 6, wherein the resource block size corresponds to the size of 12 subcarriers in the frequency domain.

15. A method of generating a reference signal sequence using the Zadoff-Chu sequence, the method comprising:

defining a specific base sequence using the q-th main ZC sequence, where the base sequences are divided into groups, and "q" is a function of the group index (u), and the base sequence index within the group (v); and using a cyclic shift corresponding to the variable cyclic shift values to the defined basic sequence for generating the reference signal sequence.

16. The method according to example 15, where the specific sequence index ZC (q) is determined by one of the equations, (1)

(2) q = round (y)+ where- ^ ta '_t ^ · “« and0·1 »}·’5{o, l floor (in “/ 30) -lj ^" ίτ ^ ιηιχβ 1 or (3) q = 7 ™ (f) y (Organism).

where y = Υ («+ 1), we {0,1, ..., 29}, ve} 0fl ..... jber {N% / 30) -1}

CG (being the length of the main ZC sequence generation used for the qth generation

CG of the main ZC sequence. is given by the largest prime number that is smaller than the □ G size of the defined base sequence. is a specific reference prime number, "round (z)" is the function rounding to the integer nearest to z, and "floor (z)" is the function giving the largest integer not greater than z).

17. The method of example 15, wherein the specific index of the sequence ZC (q) is determined by one of the equations, (1) g = jloor \ y + 0.5) + yŁ "rf <2 J

JŁf f \ where y = ^^ + 1) - lj (2) g = Jlocr (y -1-0.5) + Jloor —— Y \ * y where ueft.1 ..... 29}(vej0X .., 7loor (/ v £ / 30) -li or (3)

CO (being the length of the main ZC sequence generation used for the q-th generation of the main ZC sequence is given by the largest prime number that is smaller than the size □ of the defined primary sequence. Is the specific reference prime number, "round (with ) "is the function rounding to the nearest integer z, and" floor (z) "is the function giving the largest integer not greater than z).

18. The method according to example 15, where the specific index of the sequence ZC (q) is determined by one of the equations, (1)

(2)

(being the length of the main ZC sequence generation used for the q-th generation of the main ZC sequence. is given by the smallest prime number that is greater than the size of the defined base sequence. is a specific reference prime number, "round (z)" is a function rounding to the nearest integer z, and "floor (z)" is the function giving the largest integer not greater than z).

19. The method according to example 15, where the specific index of the sequence ZC (q) is determined by one of the equations, (1)

cc (being the length of the main ZC sequence generation, used to generate the q-th rjO of the main ZC sequence. is given by the smallest prime number that is greater than the size □ of the defined primary sequence. is a specific reference prime number, "round (with ) "is the function rounding to the nearest integer z, and" floor (z) "is the function giving the largest integer not greater than z).

twenty. The method according to example 15, where the maximum number of index of the basic sequence number (v) in each group is equal to 2, and wherein the specific sequence index ZC (q) is determined by one of the equations, (1) g = round (+ v * (—1 where y --—-, ω G {0sls. .., 29}, v £ {0,1}4 'reference, 2c (2) q - rountgy) + v «(- where Z = \,» 6 {0,1, ..., 29), ve {0.1} or (3)

rp (being the length of the main ZC sequence generation, used to generate the q-th rjO of the main ZC sequence. is given by the largest prime number that is smaller than the size □ of the defined primary sequence. is the specific reference prime number, "round (with ) "is a function rounding to the nearest integer z, and" floor (z) "is the function giving the largest integer not greater than z).

21. The method according to example 15, where the maximum number of the index of the basic sequence number (v) in each group is equal to 2, and wherein the specific index of the sequence ZC (q) is determined by one of the equations, (1)

(2)

or (3)

co (being the length of the main ZC sequence generation used for the qth generation

CO main sequence ZC. is given by the largest prime number that is smaller than the size □ with a defined basic sequence. is the specific first reference, "round (z)"

is the function rounding to the nearest integer z, and "floor (z)" is the function giving the largest integer not greater than z).

22. The method according to example 15, where the maximum number of the index of the basic sequence number (v) in each group is equal to 2, and wherein the specific index of the sequence ZC (q) is determined by one of the equations, (1)

(2)

or (3)

πρ (where is the length of the main ZC sequence generation that is used for the qth generation

CC of the main ZC sequence. is given by the smallest prime number that is larger than the size

OC of the defined basic sequence. is a specific reference prime number, "round (z)" is the function rounding to the integer nearest to z, and "floor (z)" is the function giving the largest integer not greater than z).

23. The method according to example 15, where the maximum number of index of the basic sequence number (v) in each group is equal to 2, and wherein the specific sequence index ZC (q) is determined by one of the equations, (1) ^ = ^ (7 + 0.5 ) + ^ (- 1) ^^ · Γμ + 1) where y = JL-S-, we {0,1, ..., 29), ve {0, l) 1 *ędziferenae.zć (2) q— y7oor (y + 0,5) + (τ ^ -ι) · («+ ι), - ( where y --—-——? ω e {0,1, ..., 29}, v € {0,1} * * rej & rs / K & .zc * or (3)

co (being the length of the main ZC sequence generation used for the qth generation

CO main sequence ZC. is given by the smallest prime number that is larger than the size □ with a defined base sequence. is a specific reference prime number, "round (z)" is the function rounding to the integer nearest to z, and "floor (z)" is the function giving the largest integer not greater than z).

24. The method of one of examples 16, 17, 20 and 21, wherein the specific reference prime number is 31.

25. The method of one of examples 18, 19, 22 and 23, wherein the specific reference prime number is 37.

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Method for transmitting a reference signal sequence using a Zadoff-Chu sequence

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