Method of transmitting/receiving LTE system information in a wireless communication system

Method for transmitting and receiving LTE system information in radio communication system

The present invention relates to a wireless communication system, and more particularly, relates to a method for transmitting/receiving Long Term Evolition (LTE) system information in a wireless communication system.

In the prior art, system information is mainly broadcast in a Universal Mobile Telecommunication System (UMTS) through a channel with a fixed data rate (for example, a P-CCPCH channel). This implies that the transmission of system information has a static nature. When the system information is transmitted via fixed radio resources, the network cannot have the flexibility of scheduled data transmission, so it is difficult for it to respond to changes in the radio environment. Therefore, the transmission of system information between different cells is not coordinated. Therefore, in the case of Orthogonal Frequency Division Multiplexing (OFDM), using only a static channel for transmitting system information will not optimize the transmission or reception of the system information.

The disclosure of the present invention has been developed to solve the above-mentioned related prior art problems. Therefore, the present invention discloses an effective method for transmitting and/or receiving the system information on an OFDM air interface.

Therefore, the disclosure of the present invention relates to a method for transmitting and/or receiving system information in a mobile communication system, which substantially eliminates one or more problems caused by the limitations and shortcomings of the related prior art.

In order to implement at least the above features in whole or in part, the present invention can provide a method for broadcasting or receiving the system information in a mobile communication system. The system information is grouped or classified into different types according to the characteristics of the system information, and then The system information is transmitted or received through different types of channels with specific functions. This function makes it possible to optimize the use and reception of resources through User Equipment (UE). The different types of channels can be It is a statically scheduled channel and/or an elastically scheduled channel.

Part of the additional features of the present invention will be described in detail in the specification, and a part of those skilled in the art will be able to understand after examining the following, or by practicing the present invention. The purpose and other advantages of the present invention can be understood and obtained by the structure indicated in the written specification, the scope of the patent application and the accompanying drawings.

One aspect of the present invention is the identification of the problems and shortcomings in the related technical fields described above and explained in more detail below by the inventors. Based on such recognition, the features of the present invention have been developed.

Although the present invention is shown to be implemented in a mobile communication system, such as UMTS developed in the 3GPP specifications, the present invention is still applicable to other communication systems operating in compliance with different standards and specifications.

Figure 1 is a block diagram of the network structure of an Evolved-Universal Mobile Telecommunication System, on which the technical features of the present invention can be applied. Recently, some people have advocated the implementation of the third-generation partnership project (3^rdGeneration Partnership Project, 3GPP) project to standardize a new air interface for a mobile communication system, which is relative to the second-generation air interface (commonly known as GSM and is based on time division multiplexing (TDM) ) And frequency division multiplexing (Frequency division multiplexing, FDM) based)), and the third-generation air interface (which is generally called UMTS and is based on code division multiplexing (CDMA)) . The new air interface of the Long Term Evolition (LTE) technology currently under discussion is based on Orthogonal Frequency Division Multiplexing (OFDM). The E-UMTS is a system evolved from traditional UMTS, and its basic standards are currently being processed by 3GPP.

Please refer to Figure 1. An E-UMTS network includes a user equipment (hereinafter abbreviated as UE), a base station (hereinafter referred to as "eNode B" or "eNB"), and an access gateway (hereinafter abbreviated as It is "aGW", which is connected to an external network at the end of the E-UMTS network. The ENB and the aGW are connected via an interface S1. The aGW can be classified into two parts: one One part is used to process user traffic, and the other part is used to process control traffic. A first aGW for processing new user traffic can communicate with a second aGW for processing control traffic through a new interface. A first interface for transmitting user traffic or a second interface for transmitting control traffic may be located between a plurality of eNBs. Here, the eNB may include at least one cell.

The eNB can perform the following functions: selecting an access gateway (AGW), routing to the AGW when radio resource control (RRC) is activated, scheduling and transmitting paging messages, and broadcasting channels ( Broadcast Channel (BCCH) information scheduling and transmission, dynamic allocation of resources to UEs in uplink and downlink, eNB measurement setting and provision, a radio transmission control, a radio admission control (radio admission control) , RAC), and a connection movement control in the LTE_ACTIVE state.

The functions located in the eNB will be briefly described as follows: The function "Inter Cell RRM" can handle the use of resources available between different cells and eNBs. The function "Connection and Mobility Control" can control the maintenance of the connection between the network and a relocation of the UE context in the case of action. The function "Radio Carrier Control" can maintain the UE and the UE. Radio bearer (RB) between eNBs. The radio transmission (RB) is a service provided by the second layer for data transmission between the terminal and the UMTS Terrestrial Radio Access Network (UMTS Terrestrial Radio Access Network, UTRAN). Generally speaking, setting RB refers to the process of stipulating the characteristics of a protocol layer and a channel. The protocol layer is required to provide a specific data service, and the channel is required to set individual detailed parameters and operating methods. The function "Radio Admission Control" can provide specific service quality (Quality of Service) to ensure that certain resources are available. Therefore, it is determined for a requested radio service when the required resource is available and the permission does not jeopardize the resource acquisition of the already permitted service. The function "Configuration and Provision of eNB Measurements" can provide the eNB to configure measurements in the UE and provide it with information for performing these measurements. The function "Dynamic Resource Allocation" can specify that the eNB dynamically allocates available resources to different UEs served by the eNB. The radio resource control (RRC) layer can be located in the lower part of layer 3 and is only defined in the control plane (contro1 plane). The radio resource control (RRC) layer can control logical channels, transport channels and physical channels related to the setting, resetting, releasing or canceling radio bearer (RB) transmission. In addition, RRC can handle the movement of users in a radio access network (RAN) and other services, such as location services. The Radio Link Control (RLC) layer can perform segmentation and concatenation in sequential delivery, repetition, error recovery, and other functions to exchange service data between the eNB and the UE entity Unit (Service Data Unit, SDU). The RLC layer can create a protocol data unit (Protocol Data Unit, PDU), which uses a sequence number to allow rescheduling and detection of lost or resent PDUs. The MAC layer can control the access to transmission resources. The physical layer can provide an information delivery service to an upper user by using radio transmission technology.

In the evolved UTRAN (envolved UTRAN, E-UTRAN), the aGW can perform the following functions: paging and sending, LTE-IDLE state management, user plane encryption (ciphering), support for a packet data convergence protocol (Packet Data Convergence Protocol, PDCP), a system architecture evolution (System Architecture Evolution, SAE), and non-access layer (Non-Access Stratum, NAS) signaling (signaling) encryption and integrity protection.

The functions located in the aGW will be briefly described as follows: The function "SAE Carrier Control" enables UTRAN to construct and maintain a radio access carrier (RAB) used to communicate between the terminal and the core network. The core network can request end-to-end quality of service (QoS) requirements from the RAB, and the RAB can support the QoS requirements set by the core network. Therefore, by constructing and maintaining RAB, UTRAN can meet end-to-end QoS requirements. The function "Mobility Management Entity" can process data from the home database, and can maintain subscription data (such as allowed areas, etc.), accept/reject the UE location in IDLE, and store the UE address (TA) in IDLE , Can handle user identity secrets (TMSI) and so on. The PDCP layer can be located above the RLC layer. The PDCP layer can be used to transmit network protocol data, such as IPv4 and IPv6, to a radio interface with a relatively small bandwidth. The PDCP layer can reduce unnecessary control information used in the wired network, and can perform a function called head-end compression. In addition, the PDCP layer can provide encryption and integrity protection to the transmitted data.

The transport channel can be introduced into the wireless communication system to allow different types of quality services to transmit information. The transport channel can provide a service to the MAC layer and connect with the physical layer. The different transport channels can be introduced into LTE, as follows: First, the types of the downlink transport channel (downlink transport channel) are described as follows: 1. The characteristics of the broadcast channel (Broadcast Channel, BCH) are: a) Fixed, pre-determined The defined shipping format. b) It needs to be broadcast to the range covered by the entire cell. 2. Downlink Shared Channel (DL-SCH) features: a) Support HARQ, b) Support dynamic link adaptation (dynamic link adapatation) by changing modulation, c) Broadcast to the entire cell Probability, d) the probability of using beamforming, e) supports dynamic and semi-static resource allocation, f) supports UE discontinuous reception (DRX) to save UE power, and g) supports MBMS transmission (FFS). 3. Call channel (Paging Channel, PCH) is characterized by: a) support for UE discontinuous reception (DRX) to save UE power (the network will indicate the DRX cycle to the UE), b) need to broadcast to the range covered by the entire cell, c) pair Yingzhi can also be dynamically used for the physical resources of traffic or other control channels, and 4. Downlink Multicast Channel (MCH) is characterized by: a) It needs to be broadcast to the range covered by the entire cell, b ) Supports joint MBMS transmission on multiple cells (the precise joint plan is FFS), and c) supports semi-static resource allocation (for example, a time frame with a long cyclic prefix. Similarly, uplink The types of transport channels can be described as follows: 1. The characteristics of Uplink Shared Channel (UL-SCH) are: a) the probability of using radio waves, b) by changing the transmission power and potential modulation and coding , Support dynamic link adaptation, c) support HARQ, d) support dynamic and semi-static resource allocation, and 2. Random Access Channel (Random Access Channel, RACH) is normally used to activate a cell. The characteristics of RACH are: a) Limited data fields, and b) collision risk.

In a mobile communication system, before a UE (ie, a terminal) accesses a cell, the UE can receive system information. This system information may include information used by the UE in an idle state (that is, there is no context between the UE and the eNB) and in the connected state. For example only, the main system information can be sent to the BCCH logical channel that maps the primary common control physical channel (P-CCPCH). At the same time, a specific system information block can be sent to the FACH channel. When the system information is sent to the FACH, the UE can receive settings on the BCCH received on the P-CCPCH or on a dedicated channel. Here, the transmission of the P-PCCPCH uses the same cell's primary scrambling code as the primary common pilot channel (P-CPICH). The spreading code used by the P-CCPCH may have a fixed spreading factor (spreading factor, SF) 256, the number of unfolding codes can also be one. The UE sends from the network, the information on the system information of the nearby cells that the UE has read (that is, the information that the UE has received on the DCCH channel), or by searching for the P-CPICH (always Use the fixed SF256 and the spread code number 0) with a fixed pattern to know the main scrambling code. The system information may include information about nearby cells.

The system information can include the following information: nearby cells, random access channel (RACH) and forward access channel (Forward Access Channel, FACH) transport channel settings, as well as indicator channel (MBMS Indicator Channel, MICH) and multicast control Channel (Multicast Control Channel, MCCH) settings, these channels are exclusive channels for Multimedia Broadcast/Multicast Service (MBMS) services. Whenever the UE changes its cell, it may temporarily settle in the idle mode, or when the UE has selected a cell (in the CELL_FACH, CELL_PCH or URA_PCH state), the UE may need to verify whether it has valid system information. The system information can be organized in several system information blocks (SIB), a master information block (MIB), and arrangement blocks. The MIB can be sent frequently and can give or provide timing information for scheduling blocks or different SIBs (timing information). For several SIBs connected to a numerical label, the MIB may contain information about the last version of a part of the SIB. If the SIB is not connected to a value tag, the SIB can be connected to an expiration timer. Here, if the last read time of the SIB is greater than this timing value, the SIB connected to an expiration timer may be invalid and may need to be read again. Similarly, if several SIBs connected to a numerical label have the same numerical label broadcast in the MIB, then the several SIBs connected to a numerical label are valid. Each block may include a valid area range (ie, cell, Public Land Mobile Network (PLMN), PLMN in the same sense), which indicates on which cell the SIB is valid. For example, a SIB with a "cell" with a region range may only be valid when the cell has been read. A SIB with an area scope "PLMN" can be valid in the entire PLMN. A SIB with a "same-sense PLMN" with a regional scope can be valid in the entire PLMN and the same-sense PLMN.

When the UE is in idle mode, CELL_FACH state, cell_PCH state, or cell URA_PCH state (that is, the cell that the UE has selected, the cell that the UE is temporarily settling in), the UE can read system information. The UE can receive information from nearby cells on the same frequency, different frequencies and different radio access technologies (RAT). By doing so, the UE can know which cell lineages are candidates for reselection. In a CELL_DCH state, the UE can learn about different radio links other than the current user of the UE. In this case, it may be more difficult for the UE to read additional channels (for example, BCCH channels). Therefore, the information of the nearby cell can be received in a dedicated message from the RNC. However, it is possible for the UE to read the system information sent to the P-CCPCH channel in the CELL_DCH state or other transport channels.

The long-term evolution technology LTE may be based on Orthogonal Frequency Division Multiplexing (OFDM). Figure 2 illustrates an exemplary transmitter of an OFDM scheme.

As shown in Figure 2, a QAM modulation can be used to modulate an input signal (symbol). The stream of the modulated signal can be converted into a parallel complex bit-stream (bit-stream). Then, the bit stream can pass through a discrete Fourier transform block. After the bit is mapped to an appropriate frequency, a vector is input to the inverse fast fourier transmission (IFFT) block. Here, the parallel-to-sequence block may create a complex signal. A cyclic prefix can be added to the symbol, and a multipath transmission has been processed. The output signal after each IFFT can be referred to as an OFDM symbol.

Several OFDM symbols can be grouped together to form a sub-frame as shown in Figure 3. The high bit rate stream can be converted into several parallel bit rate streams with low data rates. Therefore, each series connection uses a smaller bandwidth, and each series stream can effectively combat a frequency selective fading and multipath. Here, as long as the sub-carriers are transmitted at the same interval, it is possible for the UE to receive only a part of the complete transmission bandwidth as shown in Figure 4 (that is, shaded and unshaded The part indicates that the subcarrier has been transmitted, but the shaded part shows that only the subcarrier is received). Therefore, the bandwidth used for reception and transmission can be different.

The LTE system can be designed so that it can operate under many different bandwidths (for example, 20Mhz, 10Mhz, 5Mhz, 2.5Mhz and 1.25Mhz). Therefore, when a UE tries to find out whether a cell exists, it may not know the bandwidth used by the cell. The UE can transmit a reference signal, which can be transmitted via a synchronization channel (SCH) to allow the UE to find out the existence of the cell. Here, all part of the bandwidth can be used to transmit the reference signal to the SCH to allow the UE to find any cell. Therefore, the UE may only need to search for a limited amount of SCH bandwidth. Similarly, the UE can determine the existence of a cell and obtain secondary frame synchronization by searching for the SCH channel. In order to allow the UE to receive more information about cell characteristics, it is necessary for the UE to receive broadcast information, which is carried on the BCH channel. Such a BCH can be transmitted with a limited total bandwidth or a part of the total bandwidth, just like the SCH channel.

In a multi-cell environment, the UE receives different signals (cells) from several base stations fixedly. In this case, when the UE decodes the transmission of a cell (for example, the signal transmission of a cell B can cause interference to the cell A and can increase the error reception rate of the cell A), the transmission of the different signals may not be synchronized. In order to increase the correct acceptance rate, the cells can coordinate their transmissions to transmit the same signal with a time correction method, so that the UE can jointly decode the received signal from the cell shown in Figure 5. This receiving method can be called soft combining, because the UE can combine the received signals of the two cells in the receiving phase. Signals from different cells are not considered as interference, so soft combining can increase the quality of the signal received by the UE. Although many other different technologies exist due to soft bonding, this solution may require very strict or compact synchronization between one of the cells. When the OFDM is used as a modulation scheme, the time synchronization may need to be about the length of a cyclic prefix to handle a constructive interference.

If it is not possible to achieve a compact synchronization level, a selective combing can be used. Because the selective combination method allows the UE to independently receive signals sent from several base stations, the selective combination method can be distinguished as a soft combination. Although the two cells may not transmit the same signal, the UE can know that the two cells transmit the same data. Therefore, by receiving the transmission of the signal from the two cells, it is possible to receive data from one cell correctly, even if the other data received from the other cell is incorrect. Therefore, the selective combination method can increase the overall quality of data reception (that is, faster transmission). Because the selective combination can be performed at the RLC level, the RLC sequence number can be used to reschedule the data unit (PDU) received from different cells involved in the selective combination.

Because the overall downlink capacity (that is, the bandwidth) of a cell is greater or wider than the UEs ability to receive, the UEs bandwidth does not use a maximum download link bandwidth (that is, all Only part of the download link bandwidth is used). Generally, in an LTE system, the maximum bandwidth of a cell is set to 20Mhz, and the minimum receiving bandwidth of the UE is set to 10Mhz. Therefore, a UE with a 10Mhz receiver can adjust its receiver to the leftmost or rightmost part of the spectrum shown in Figure 6. Therefore, if the data or signal on the BCH or the SCH is sent to a center frequency of a download bandwidth, such data or signal may not be received correctly.

The present disclosure can provide a method or system so that the system information can be grouped or classified into different types according to the characteristics of the system information, and the system information can be sent to a channel with a specific function to allow the optimization of resource usage And improved UE reception. Here, the system information can be grouped into primary system information and secondary system information, as shown in Table 1. The main system information is composed of information necessary for further receiving the secondary system information. The secondary system system information can be further planned into cell-level system information and PLMN-level system information. It depends on whether a content of the information is a cell-specific content (that is, the information is only valid in a specific cell) or the same content for different cells of the same PLMN (that is, the information in the entire network It is effective). Similarly, the types of some system information can often change due to the radio communication environment. Therefore, the cell-level system information can be further classified into dynamic information and semi-static system information, depending on whether the content of the information changes frequently (dynamic) or not frequently (semi-static).

<tables><img file="TW200746699A_D0001.tif" /></tables>

Here, the main system information can be sent to a transport channel with a fixed schedule, such as the BCH, and the secondary system information can be sent to a transport channel with a flexible schedule, such as DL-SCH . The PLMN-level system information can be sent by coordinating nearby cells, so that the selective combination or the soft combination can be applied. If the UE has the ability to receive only a limited bandwidth (that is, 10Mhz), the BCH can be used in a way that the UE can receive the right, left, or middle part of the total downlink bandwidth (that is, 20Mhz spectrum) Be transmitted.

The system information can be classified in detail as shown in Table 2:<tables><img file="TW200746699A_D0002.tif" /></tables>

When a UE is located or temporarily settled on a cell, after a synchronization process of the synchronization channel, the UE can read the main system information of Table 2 immediately. The main system information may have specific and semi-static characteristics. The main system information may include the scheduling information of the required system information block (for example, R6 MIB or SB). Therefore, after reading the primary system information, the UE can read the secondary system information according to a scheduled time and frequency. The cell-level secondary system information in Table 2 is grouped into cell-specific. Therefore, when the UE moves to a new cell (that is, not the current cell), the UE can read the cell-level secondary system information in the new cell, regardless of the previous cells Reading of the secondary system information of the cell level.

The dynamic cell-level secondary system information of Table 2 may include rapidly changing parameters (such as interference), which may be used in a common channel, such as a random access channel (RACH). Here, except for the dynamic cell-level secondary system information, all the cell-level secondary system information in Table 2 can be considered semi-static (that is, the content does not change frequently). The PLMN-level secondary system information in Table 2 is not cell-specific, but is common to most cells in the PLMN area. Therefore, if the UE (which has read the PLMN-level secondary system information in the previous cell) moves to a new cell and the PLMN-level secondary system information has not been modified, the UE does not need to read Secondary system information of the same PLMN level in a new cell. Here, the PLMN-level secondary system information usually has a semi-static feature.

For system information in an LTE system, a MIB can use a fixed resource because the UE will probably not obtain any control information before receiving the MIB in a cell. However, the eNB can set a specific transmission time interval (Transmission Time) indicated by the MIB. Intervals (TTI) schedule SIB (that is, SIB on SCH). If a certain SIB is scheduled in a certain TTI, the control information of the TTI can indicate the existence of the SIB in the TTI, and a time or frequency of the SIB can be scheduled. Therefore, the eNB can have more flexibility of the SIB within the minimum range of the UE capability. Similarly, the eNB may have more flexibility in scheduling SCH. In detail, the UE may receive the MIB in a fixed downlink (DL) resource (e.g., time/code/frequency). If the MIB includes the long-term scheduling information transmitted by the SIB, and the UE has a specific SIB, the UE can receive a DL control channel for one or more TTIs, which is indicated by the long-term scheduling information of the SIB, to obtain The short-term schedule of this SIB. Then, if the UE finds that the short-term scheduling information in the TTI on the DL control channel indicates that the SIB exists in the TTI and the UE successfully receives the short-term scheduling information of the SIB, the UE can broadcast in a DL The channel receives the SIB located in the DL resource (for example, the time and frequency of the DL broadcast channel), which is indicated by the short-term schedule of the SIB. After that, the UE can operate based on the received SIB.

The BCH channel can have an overall fixed setting for the UE to decode without any control information. Therefore, the main system information can be broadcast on the BCH. Here, the secondary system information can be broadcast on the DL SCH. In this case, a setting of the DL SCH on the BCCH can be carried on the main system information on the BCH. A second layer (L2) can handle the transmission of primary and secondary system information (e.g., segmentation and connection) differently. Therefore, different BCCH logics are merged and set to the primary and secondary system information. As shown in Table 2, one SIB 1, one SIB 15.3 and one SIB 16 can span several cells in the PLMN area. Here, the SIB 1 may include NAS system information and a UE timer and counter, SIB 15.3 address servo information and SIB 14 predefined settings. In the LTE system, when the SIB 1 and SIB 16 are broadcast on the BCCH, a combination technology that spans several cells can be considered to convey NAS system information, UE timer/counter and predefined settings.

From a performance point of view, it is generally believed that a soft bond is better than a selective bond. Therefore, the soft combination can be applied to the PLMN system information, such as SIB 1 and SIB 16 in LTE. Therefore, a first layer (L1) can provide a specific common guide and long cyclic prefix to SIB 1 and SIB 16. In addition, a synchronized time and/or frequency transmission of specific system information between cells can be provided. In addition, the selected combination can be applied to the PLMN-level system information, such as SIB 1 and SIB 6 in the LTE system. Here, the first layer (L1) may not need to consider specific common guidance, the length of the cyclic prefix, and synchronized transmission. However, a UE should decode multiple cells to selectively combine the BCCH channels of several cells. In addition, the UE should apply the overwrite avoidance function in a second layer (L2). Due to this overwrite avoidance function, an aGW may need to provide the serial number of the PLMN-level system information.

A special case of the 20Mhz system bandwidth of a part of the carrier being received by the UE is shown in Figure 7. As illustrated in Figure 7, the UE is allocated to the right half of a bandwidth. When a BCH is encoded and placed on a central frequency, it may not receive the BCH correctly. Therefore, in order to allow the UE to receive the BCH in all situations, the BCH should be transmitted in different ways. Here, an alternative 1 or an alternative 2 can be proposed. In Alternative 1, the BCH block can go to the upper 10Mhz or the lower 10Mhz, as shown in Figure 7. In Alternative 2, the BCH can be split into two blocks, and the two blocks can be received independently. In this case, when the UE receives half of the BCH transmission and the other half of the BCH transmission, the UE can be adjusted to receive the two blocks. Therefore, although the UE may not be able to receive as fast as other UEs, the UE can still receive the BCH.

Here, when BCH should be transmitted to different system bandwidths in the same way, system information can be split into primary system information and secondary system information. The primary system information may include a system bandwidth, schedule information of secondary system information, and other basic information (for example, MIB in R99). The main system information can be sent on the BCH channel (also called a main BCH) as described above. The main BCH channel may have a fixed setting (that is, depending on the setting of the SCH). The secondary system information can include other system information blocks, and the secondary system information can be sent to a primary BCH or a DL-SCH. Here, these channels can have a flexible setting: each UE can be supported by the minimum UE capability. It is possible to provide this setting on the main system information. If a cell supports a bandwidth greater than 1.25Mhz, the secondary system information can be sent with a bandwidth greater than 1.25Mhz, or with the smallest UE receiver bandwidth. Therefore, the secondary system information can be transmitted at any subcarrier and time based on the schedule information contained in the primary system information.

The present disclosure can provide a method for broadcasting system information in a mobile communication system. The method includes: classifying the system information based on the characteristics of the system information; and transmitting via at least one of a first type channel and a second type channel Transmitting the classified system information, wherein the first type of channel is a statically scheduled channel, and the second type of channel is a flexible scheduling channel, wherein the first and second types of channels are conveying channels, The system information can be classified into primary system information and secondary system information. The primary system information includes at least one: public land mobile network (PLMN) information and schedule information of the secondary system information. The system information is classified as cellular Hierarchical system information and PLMN-level system information. When a content of the system information is used or valid for a specific cell, the system information is cell-level system information. When a content of the system information corresponds to a PLMN area The system information is the PLMN-level system information. The cell-level system information is either dynamic system information or semi-static system information. When one of the secondary system information is When the content changes frequently, the cell-level system information details the dynamic system information. When a content of the secondary system information does not change frequently, the cell-level system information is the semi-static system information, and the main system information is through The first type of channel transmission and/or the secondary system information is transmitted through the secondary type of channel, and the first type of channel is a broadcast channel (Broadcast Channel, BCH), and the second type of channel is a downstream Link sharing channel (Downlink Shared Channel, DL-SCH).

It can also be said that the present disclosure provides a method for receiving system information in a mobile communication system. The method includes: receiving the system information via one of a first type channel and a primary type channel, wherein the first type channel is a Static scheduling channel and the second type row channel is a flexible scheduling channel. The received system information is classified by a network entity according to the characteristics of the system information. The first and second types of channels are transmission channels. System information is classified into primary system information and secondary system information. The primary system information includes at least one of the following: PLMN information and schedule information of the secondary system information. The system information is classified into cell-level system information and PLMN level. System information, the cell-level system information is dynamic system information or semi-static system information, the primary system information is received through the first type of channel and/or the secondary system information is received through the second type of channel, And the first type channel is a broadcast channel (BCH) and the second type channel is a downlink shared channel (DL-SCH).

Here, the present disclosure can provide a method for transmitting or receiving system information, which uses not only the first and second channels but also many other different types of channels. Although the scope of this disclosure is in mobile communication, the present invention can also be used in any wireless communication system, using mobile devices, such as PDAs and laptop computers equipped with wireless communication capabilities (ie, interfaces). In addition, certain terms used to describe the present disclosure are not intended to limit the scope of the present disclosure to a certain type of wireless communication system. This disclosure can also be applied to other wireless communication systems that use different air interfaces and/or physical interfaces, such as TDMA, CDMA, WCDMA, OFDM, EV-DO, Wi-Max, Wi-Bro, etc.

Using standard programming and/or engineering techniques for generating software, firmware, hardware, or a combination of the above, the exemplary embodiment can be implemented as a method, equipment, or article of manufacture. The term "article" used here refers to the code or logic implemented in the following: hardware logic (for example, integrated circuit chip, field programmable gate array (Field Programmable Gate Array, FPGA), special purpose Integrated circuit (Application Specific Integrated Circuit, ASIC), etc.), or computer readable media (for example, magnetic storage media: hard disk, magnetic disk, tape, optical storage: CD-ROM, optical disc, volatile or non-volatile memory Body devices: EEPROM, ROM, PROM, DRAM, SRAM, firmware, programmable logic, etc.).

The code in the computer-readable medium can be accessed and executed by a processor. The code implemented in the exemplary embodiment can be further accessed via a transmission medium or from a file server on the network. In such a case, the product in which the code is implemented may include a transmission medium, such as a network transmission line, wireless transmission medium, and signals, each of which is transmitted through space, radio waves, infrared signals, etc. Of course, those familiar with this technical field will understand that many modifications can be made to this setting without violating the scope of the disclosure, and the product can include any media in the technical field with information. In this specification, "an embodiment", "an embodiment", "exemplary embodiment", etc. mean: a particular feature, structure, or characteristic described in relation to the embodiment is included in at least one embodiment of the present disclosure middle. The appearance of such words in various places in this specification does not necessarily all represent the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in a manner related to any embodiment, it is considered to fall within the scope of those skilled in the art to influence such features, structures, or characteristics related to other embodiments. Structure or characteristics.

Although the embodiments have been described with reference to several illustrative embodiments, it should be understood that many other modifications and embodiments can be conceived by those skilled in the art and still fall into the present disclosure. Within the spirit and scope of the principles. More specifically, various changes and modifications are possible in the element part and/or the schedule of the subject combination schedule within the scope of the present disclosure, illustrations, and appended patent applications. In addition to changes and corrections in the component part and/or schedule, those skilled in the art can also understand alternative uses.

Because this disclosure can be implemented in several forms that do not violate its spirit or basic characteristics, it should be understood that the above-mentioned embodiments are not limited by the above detailed description, unless explicitly pointed out, but should be broadly Interpretation of the spirit and scope defined in the scope of the attached patent application. Therefore, all changes and modifications that fall within the boundaries and boundaries of the scope of the patent application or equivalent to such boundaries and boundaries are therefore intended to be covered by the attached patent application. Included in the scope.

Figure 1 is a diagram as an example, which illustrates the protocol architecture of E-UTRAN.

Figure 2 illustrates an exemplary structure of an OFDM transmission.

Figure 3 illustrates the structure of an OFDM subframe.

Figure 4 illustrates a diagram as an example that illustrates the subcarriers in the transmission bandwidth.

Figure 5 illustrates a diagram as an example illustrating the number of cells received by a UE.

Figure 6 illustrates a diagram as an example illustrating a 10MHz UE with a 20MHz spectrum according to the present invention.

FIG. 7 illustrates a diagram as an example, which illustrates the reception of the BCH in the case of a 20Mhz system bandwidth according to the present invention.

Figure 8 illustrates a diagram as an example illustrating a primary and secondary BCH according to the present invention.