Logic interface setting method, radio base station, and communication managing device

A logic interface setting method, a base transceiver station, and a communication management device

0001When the present invention relates to construction of a communication network widely and a plug-and-play type base transceiver station (PnP*eNB) is especially added to a network newly, It is related with the technique of setting up a logic interface autonomously between new eNB and a higher rank node and between new eNB and existing neighborhood eNB.

0002When a new node was added to a network, conventionally, for every new node added, it determined with which higher rank node or a neighboring group place office an operator should connect, and was setting it up manually. However, it is complicated, and also cost also requires introduction of the new node by an operator's manual operation, and it is not desirable.

0003Then, after installing a new node by the minimum work, the network construction art in which logic connection (logic interface) is set up by autonomous operation of a new node between a neighboring base station or a higher rank node (communication management device) is needed.

0004In order to realize such a network, it is a plug-and-play (PnP:plug*and*play) type, That is, if cable connection of the base transceiver station is carried out, the indicator of the radio access network where a logic connection network is set up autonomously is proposed (for example, refer to nonpatent literature 1). If a PnP type base transceiver station (eNB) does power-on in this proposal, Using the IP address of the self-office given dynamically, and a gateway address and a DNS server address, eNB establishes initial connection between OAM servers, and acquires information required for network intervention from an OAM server. And it connects with the optimal higher rank node (MME/UPE) automatically. Even this is a stage of a basic setup and it sets a radio-related parameter after that.<nplcit num="1"><text>"Standardization*policy*for*plug*and*play*RAN",*R2-061929,*3GPP*TSGRAN*WG2*Ad*Hoc*on*LTE,*27th-30th*June*2006,*Cannes, *France</text></nplcit>

<p num="0005">However, the concrete method is not indicated [ how a logic interface is autonomously established between new eNB and a higher rank node (MME/UPE) and between new eNB and neighboring eNB, and ] by the above-mentioned literature.</p><p num="0006">It is necessary to change new eNB first into the state where an OAM server can be accessed, and to make the required information for network intervention receive from an OAM server.</p><p num="0007">Then, when the present invention adds newly a plug-and-play type base transceiver station (PnP*eNB) to a network, Let it be a subject to provide the method of realizing a setup of a logic interface automatically, between a new base transceiver station (eNB) and a higher rank node (communication management device) and between new eNB and existing neighborhood eNB. Let it be a subject to provide the new composition of the base transceiver station (eNB) which can make such logic connection, and the communication management device (for example, MME/UPE) of a higher rank.</p>

<p num="0008">In order to solve the above-mentioned subject, it is at the 1st side, Logic interface setting method, In the base transceiver station newly added to the (a) network, The IP address of the new base transceiver station concerned is Advertise(ed) on a transport network, In the existing base transceiver station or higher rank node which received the (b) above-mentioned IP address, The number of hop from the above-mentioned new base transceiver station to a self-office is detected, When the number of hop which carried out (c) detection is below a predetermined threshold, an initial logic interface is set up among the above-mentioned new base transceiver stations.</p><p num="0009">At the 2nd side, it is a logic interface setting method, (a) Radio transmission of the information signal which tells existence of a base transceiver station to the new base transceiver station concerned newly added to a network is carried out, (b) Measure the radio quality of the above-mentioned new base transceiver station in the moving terminal which received the above-mentioned information signal, and it is the (c) above-mentioned measurement result, The existing base transceiver station is notified of the radio discernment information of the above-mentioned new base transceiver station included in the above-mentioned information signal from the above-mentioned moving terminal, It is a base transceiver station of the (d) above-mentioned existing, The radio discernment information of the above-mentioned new base transceiver station is changed into an IP address, Based on the (e) above-mentioned IP address, a logic interface is set up between the above-mentioned new base transceiver station and a higher rank node.</p><p num="0010">In the 3rd side, a base transceiver station suitable for the above-mentioned method is provided. As one mode, it is a base transceiver station. When entering into a network newly, Advertise transmission of the IP address of a self-office is carried out on a transport network, and the above-mentioned transport network is passed, The transmission and reception section which receives the logic interface information which the existing base transceiver station concerned or higher rank node has from an existing base transceiver station or higher rank node, The logic interface information preparing part which creates the logic interface information for a self-office based on the logic interface information which received [ above-mentioned ], Logic interface set part which sets up an additional logic interface based on the logic interface information which created [ above-mentioned ] between the above-mentioned existing base transceiver station which has sent the above-mentioned radio interface information, the existing base transceiver stations other than a higher rank node, or a higher rank node It has.</p><p num="0011">As another example of composition of a base transceiver station A Tolas port network is passed, The transmission and reception section which receives the IP address of the base transceiver station which enters into a network newly, The number judgment part of hop which detects the number of hop from the above-mentioned IP address to the above-mentioned new base transceiver station, and judges whether the above-mentioned number of hop is below a predetermined threshold, When the above-mentioned number of hop is below a threshold, it has composition which has a logic interface set part which sets up a logic interface among the above-mentioned new base transceiver stations.</p><p num="0012">As another example of composition of a base transceiver station Information signal generating part which generates the information signal which notifies existence of a self-office when entering into a network newly, The 1st transmission and reception section that carries out radio transmission of the above-mentioned information signal A cable network is passed, The 2nd transmission and reception section that receives higher rank node information from the existing base transceiver station Logic interface set part which sets up a logic interface between higher rank nodes based on the above-mentioned higher rank node information It has composition which it has.</p><p num="0013">The example of composition of the base transceiver station which operates as another mode based on the information from a mobile station is provided. Such a base transceiver station Radio discernment information of the base transceiver station which enters into a network newly from a mobile station, The 1st transmission and reception section that receives radio quality measurement information on radio IP address acquisition part which changes the above-mentioned radio discernment information into an IP address Based on the above-mentioned IP address, it has the 2nd transmission and reception section that notifies the above-mentioned new base transceiver station of the higher rank node information which a self-office has.</p><p num="0014">As another example of composition of the base transceiver station which operates based on the information on a mobile station, it is a base transceiver station, Radio discernment information of the base transceiver station which enters into a network newly from a mobile station, The 1st transmission and reception section that receives radio quality measurement information on radio IP address acquisition part which changes the above-mentioned radio discernment information into an IP address The 2nd transmission and reception section that notifies the above-mentioned IP address to a higher rank node It has.</p><p num="0015">In the 4th side, a communication management device suitable for the setting method of the logic interface mentioned above is provided. Communication management device Logic interface attaching part holding the logic interface information used in the same pool, The transmission and reception section which receives the IP address of the base transceiver station which enters into a network newly via a Tolas port network, The number judgment part of hop which detects the number of hop from the above-mentioned IP address to the above-mentioned new base transceiver station, and judges whether the above-mentioned number of hop is below a predetermined threshold, When the above-mentioned number of hop is below a threshold, it has a logic interface set part which sets up a logic interface among the above-mentioned new base transceiver stations.</p>

<p num="0016">With the above-mentioned technique, the judgment and a manual setup by an operator become unnecessary at a setup of the logic interface at the time of new eNB entering into a network.</p><p num="0017">Autonomous operation of new eNB and the existing eNB enables it to set up a logic interface optimal an interface and far-reaching.</p>

0018<figref num="1">It is a schematic structure figure of the communication network where the present invention is applied.</figref><figref num="2">It is a sequence figure of X1-/S1 setting method of a 1st embodiment.</figref><figref num="3">It is a sequence figure of S1 / X2 setting method of a 2nd embodiment.</figref><figref num="4">It is a schematic block diagram of base transceiver station eNB used by 1st embodiment and a 2nd embodiment.</figref><figref num="5">It is a schematic block diagram of higher rank node MME/UPE used by 1st embodiment and a 2nd embodiment.</figref><figref num="6">It is a sequence figure showing the 1st example of S1 setting method of a 3rd embodiment.</figref><figref num="7">It is a sequence figure showing the 2nd example of S1 setting method of a 3rd embodiment.</figref><figref num="8">It is a schematic block diagram of base transceiver station eNB used by a 3rd embodiment.</figref>

Explanations of letters or numerals

001910 Base Transceiver Station (eNB) -- 11 Transmission and Reception Section 11a CN transmission and reception section 11b Radio transmission and reception section 12 Statistical Work Part 13 Circumference List / S1 List Preparing Part (Logic Interface Information Preparing Part) -- 14 Circumference List / S1 List Attaching Part 15 Number Judgment Part of Hop 15a Number Threshold Changing Part of Hop 16 X2 Establishment Protocol Execution Part (Logic Interface Set Part) 17 S1 Establishment Protocol Execution Part (Logic Interface Set Part) -- 18 Information Signal Generating Part 19 IP Address Acquisition Part 20 Higher Rank Node (MME/UPE or Communication Management Device) -- 21 Transmission and Reception Section 22 Directions Control Part 24 MME/UPE List in Pool And eNB list attaching part 25 Number judgment part of hop 25a The number threshold changing part of hop

0020Below, the good embodiment of the present invention is described with reference to drawings. Drawing 1 is a schematic structure figure of the self-organization type (self-organizing) network where the present invention is applied. A plurality of base transceiver stations (eNB) 10-1 - each of 10-n are connected to MME (mobile*management*entity)/UPE (user*plane*entity)20 which are a management node of a higher rank via transport network 40. In the embodiment, MME/UPE pools 20A and 20B and -- are constituted for a plurality of MME/UPE (20-1 to 20-3) as one group. Each MME/UPE20 in a pool is connected with a plurality of eNB10 via transport network 40. One eNB10 is connected with a plurality of MME/UPE20, and load balancing within Met Work is planned. It may be another unit although MME and UPE are made into one in the example.

0021Transport network 40 contains router 30-1 to 30-5. Router 30-2 and 30-4 are connected with the OAM (Operations, *Administration*and*Maintenance) server on the facilities of illustration to MME/UPE pool 20. Although router 30 is connected also to HLR (home location*register) and IASA (inter-access*system*anchor) which are not illustrated again, since it is unrelated to the present invention, explanation is omitted.

0022In an embodiment, base transceiver station (eNB) 10 is a plug-and-play (PnP) type node. The logic connection (logic interface) between PnP base transceiver stations (eNB) is called X2, and the logic connection (logic interface) between PnP base transceiver station 10 and higher rank node (MME/UPE) 20 is called S1.

0023PnP base transceiver station 10 will report existence of self by a cable or radio, if it is inserted in a power supply and power-on is carried out. At least 1 side of existing eNB10 which received information information, or higher rank node MME/UPE20 sets up S1 X2 or the first stage the first stage to eNB10 of new entry. New eNB10 acquires logic interface information via S1 X2 or the first stage the first stage, and it sets up S1 and X2 of an addition based on this.

0024It is explained how X2 optimal interface and S1 interface which S1 is stretched how X2 and the first stage the first stage, and cover a network widely below based on a concrete embodiment are set up. &lt;A 1st embodiment&gt; It is a sequence figure in which Drawing 2 shows X2-/S1 setting method of a 1st embodiment. According to a 1st embodiment, new eNB10 Advertise or broadcasts the IP address of a self-office on transport network 40. If the number of hop to a self-office is below a threshold, eNB10 of the circumference which received this will set up X2 between new eNB10 the first stage, and it will notify the IP address of MME/UPE20 etc. in which the circumference list which self holds, and self have stretched S1 to new eNB. New eNB creates the circumference list of self-offices based on this information, and sets up S1 between higher rank nodes.

0025If new eNB is inserted in a plug and a power supply is more specifically switched on (S11), a self IP address is automatically Advertise(ed) on transport network 40 (S12). An IP address may be first assigned fixed from an operator, and may be dynamically assigned by the DHCP (Dynamic*Host*Configuration*Protocol) function built in the general router.

0026Circumference eNB which received the IP address of new eNB via transport network 40 detects the number of hop to a self-office, and judges whether it is below a threshold (S21). For example, when eNB10-1 of Drawing 1 enters newly and it Advertise an IP address in transport network 40, the number of hop to eNB10-2 or eNB10-3 which is an adjacent node is 2. The number of hop to eNB10-4, 10-5, and 10-6 is 4. If being it threshold T= 3, since the number of hop which self detected is below a threshold, eNB10-2 of the circumference and eNB10-3 will run the procedure of X2 establishment protocol to new eNB10-1 (S22). On the other hand, on outskirts eNB of others, since the detected number of hop is over the threshold, it waits for the next Advertise, without doing anything.

0027When the threshold used for judgment of the number of hop may be beforehand set as each eNB10 by the design and Advertise an IP address, the application of new eNB10-1 may notify it by a packet.

0028If X2 is stretched the first stage between existing circumference eNB10-2 below the predetermined number of hop, eNB10-3, and new eNB10-1, they are these circumferences eNB, It is notified to new eNB10-1 that the IP address of the higher rank node (for example, MME/UPE20A-1) by which S1 is stretched now is a circumference list which self holds (S23). A circumference list may also contain the circumference celery strike (the 2nd list) which exists within limits (hand-over within the limits) which a self-office is an option and broadcasts on radio including the list (the 1st list) of partner point eNB which has stretched X2 interface now. It may not be limited to one but, as for MME/UPE which has stretched circumference eNB10-2 and 10-3S1 interface, S1 may be stretched between all the MME/UPE20A-1 in same pool 20A - 20A-3.

0029New eNB10-1 creates the circumference list of self-offices based on the information received from circumference eNB10-2 and eNB10-3 via X2 the first stage, and it sets up X2 of an addition between required circumferences eNB (S13). Based on the IP address of notified MME/UPE20A-1, S1 is set up between MME/UPE20A-1 which is a higher rank node (S14).

0030New eNB10-1 may perform a statistical work in creation (S13) of a circumference list. According to the threshold of the number of hop, circumference list information may be sent from much circumference eNB10. In that case, only a fixed number of eNB(s) are preferentially taken up in the sent circumference list from circumference eNB where appearance frequency is high, and the circumference list of self-offices is created. It is because there is little necessity of eNB with little duplication being considered to be a node which is comparatively separated from new eNB, and setting up X2 low [ appearance frequency ].

0031It may decide similarly, to perform a statistical work, when S1 information has been sent from much circumferences eNB, and to stretch S1 only to MME/UPE20 with high appearance frequency also about S1.

0032It is directed that MME/UPE20A-1 to which S1 was set between new eNB10-1 stretches S1 to new eNB10-1 to other MME/UPE20A-2 in the same MME/UPE pool 20A, and 20A-3 (S31a). Or to new eNB10-1, it may point so that S1 may be stretched between other MME/UPE20A-2 in the same pool 20A, and 20A-3 (S31b). Thereby, S1 is extended also between new eNB10-1 and an additional higher rank node (MME/UPE) (S15).

0033Threshold T of the number of hop used at Step S21 may be made variable. For example, there is no information to which it comes on the contrary from circumference eNB10 starting with T= 2, or when very small, it is good also as composition which increments the value of T until sufficient circumference information gathers. In this case, in new eNB10-1, whenever it incremented threshold T, when it carries out packet transmission of the value of T updated by application on transport network 40 and the number of the collected circumference lists becomes more than fixed numbers, it is good also as composition which starts a statistical work.

0034A setup of the circumference list which the operator judged the relation of the circumference cell and was performing manually conventionally by such a method is not only automated, but X2 interface and S1 interface will be set up between optimal circumference eNB or a higher rank node. &lt;2nd embodiment&gt;figure 3 is a sequence figure showing S1 / X2 setting method concerning a 2nd embodiment of the present invention. According to a 2nd embodiment, instead of circumference eNB, MME/UPE20 which is a higher rank node receives the IP address of new eNB Advertise(ed) on transport network 40, and judges the number of hop. If the number of hop is below a predetermined threshold, S1 will be set up between new eNB(s).

0035If new eNB (for example, eNB10-1) is inserted in a plug and a power supply is specifically switched on (S41), a self IP address is Advertise(ed) on transport network 40 (S42). An IP address may be first assigned fixed from an operator, and may be dynamically assigned by the DHCP (Dynamic*Host*Configuration*Protocol) function built in the general router etc.

0036MME/UPE20 which received the IP address of new eNB10-1 via transport network 40 detects the number of hop from new eNB10-1, and judges whether it is below a threshold (S61). For example, MME/UPE20A-1 of Drawing 1 is new eNB10-1 to 3 hop eye, and MME/UPE20B-1 is 5 hop eye. Supposing it is threshold T= 3, MME/UPE20A-1 is, S1 is stretched to new eNB10-1 (S62), and the MME/UPE list of [ in MME/UPE pool 20A to which self belongs ], and the eNB list used to MME/UPE pool 20A are notified to new eNB (S63). On the other hand, MME/UPE20B-1 waits for the next Advertise as having no necessity of setting up S1.

0037New eNB10-1 creates a circumference list and S1 list based on the received information (S43). At this time, a statistical work may be performed as an option. That is, when there are many existing eNB10 registered into MME/UPE pool 20A, the circumference list which was preferentially chosen from eNB with high appearance frequency, and was optimized is created. New eNB10-1 sets up X2 between circumferences eNB which should be connected based on the circumference list and S1 list which were created (S44).

0038If new eNB10 is physically connected with a network and power-on is carried out also by this method, it is autonomous operation of new eNB10, S1 and X2 as a logic interface can be automatically set up between higher rank nodes (MME/UPE20) and between circumferences eNB, respectively.

0039Drawing 4 is a schematic block diagram showing the example of composition of base transceiver station (eNB) 10 used in the network of Drawing 1. This eNB10 is suitably used in the both sides of a 1st embodiment and a 2nd embodiment.

0040Base transceiver station (eNB) 10 has transmission and reception section 11, statistical work part 12, a circumference list / S1 list preparing part 13, a circumference list / S1 list attaching part 14, the number judgment part 15 of hop, X2 establishment protocol execution part 16, and S1 establishment protocol execution part 17.

0041Transmission and reception section 11 contains CN transmission and reception section 11a which transmits and receives by a core network, and radio transmission and reception section 11b which transmits and receives a radio signal between moving terminals. When the eNB10 concerned begins CN transmission and reception section 11a and it is physically connected to a network, Advertise transmission of the self IP address is carried out on transport network 40, and circumference list information and S1 information (higher rank node information) are received from existing circumference eNB10 or higher rank node (MME/UPE) 20. When another new eNB has entered into the network, the IP address Advertise(ed) on transport network 40 is received.

0042Statistical work part 12 carries out the statistical work of the received circumference list information and the S1 information if needed, and chooses circumference eNB where appearance frequency is high, and a higher rank node (MME/UPE). As mentioned above, in addition to the circumference eNB list in which X2 is stretched, a circumference list may also contain the circumference celery strike in the range of hand-over.

0043A circumference list / S1 list preparing part 13 generates the circumference list for the eNB10 concerned, and S1 list with reference to a statistical work result if needed based on the circumference list information and higher rank node information which were received by CN transmission and reception section 11a. S1 establishment protocol set part 17 sets up S1 interface between higher rank nodes (MME/UPE20) according to S1 list.

0044A circumference list / S1 list attaching part 14 holds the created circumference list and the list of S1 interfaces stretched between higher rank nodes (MME/UPE20). It updates S1 list, in setting up S1 also between MME/UPE20 [ another ] contained in the same MME/UPE pool.

0045When the number judgment part 15 of hop performs X2-/S1 setup of a 1st embodiment, When another new eNB enters into a network and receives the IP address from transport network 40, a self-office determines what hop eye it is from above-mentioned another new eNB, and judges whether it is below a predetermined threshold. When a self-office is below the predetermined number of hop, by X2 establishment protocol execution part 16, X2 is set up between above-mentioned another new eNB(s), and the information which a circumference list / S1 list attaching part 14 holds is transmitted from CN transmission and reception section 11a.

0046The number threshold changing part 15a of hop changes a threshold, when a self-office participates in a network as new eNB, and the circumference list information from circumference eNB is insufficient. The threshold after change is transmitted from CN transmission and reception section 11b with an IP address. When a self-office is the existing eNB and a threshold change notice is received from another new eNB, the number threshold of hop set as the self-office according to it is updated.

0047On the other hand, like a 2nd embodiment, when judging the number of hop by MME/UPE20, a circumference list / S1 list preparing part 13 creates a circumference list and S1 list with reference to the MME/UPE list in a pool sent from MME/UPE20, and the eNB list in a pool. X2 establishment protocol execution part 16 and S1 establishment protocol execution part 17 set up X2 and S1 to existing eNB10 and MME/UPE20 which should be connected based on the created list, respectively.

0048Such composition enables base transceiver station (eNB) 10 to participate in a network in autonomous operation.

0049Drawing 5 is a schematic block diagram showing the example of composition of higher rank node (MME/UPE) 20 used in the network of Drawing 1. MME/UPE20 is used suitably for the both sides of a 1st embodiment and a 2nd embodiment.

0050MME/UPE20 contains transmission and reception section 21, directions control part 22, the number judgment part 25 of hop, S1 establishment protocol execution part 27, and the MME/UPE list in a pool and eNB list attaching part 24. In the case of a 1st embodiment, if S1 is set up between new eNB10-1, it is directed that directions control part 22 stretches S1 between this new eNB10-1 to other MME/UPE20 in the same pool. Or it is good also as composition it is directed that the IP address of MME/UPE20 in the same pool is notified to new eNB with reference to the MME/UPE list in a pool, and eNB list attaching part 24, and stretches S1 to MME/UPE20 of an addition. Such a notice of directions is transmitted from transmission and reception section 21.

0051When a 2nd embodiment is realized and the IP address of new eNB10-1 Advertise(ed) on transport network 40 by transmission and reception section 21 is received, the number judgment part 25 of hop detects the number of hop from new eNB10-1, and judges whether it is below a threshold. The number threshold changing part 25a of hop changes the threshold used for the number judgment of hop, when a threshold renewal notice is received from new eNB. When the number of hop is judged to be below a threshold, S1 establishment protocol execution part 27 is, If the procedure of S1 establishment protocol is run to new eNB10-1 and S1 is set up, the information which the MME/UPE list in a pool and eNB list attaching part 24 hold will be transmitted to new eNB10-1 from transmission and reception section 21.

0052By such composition, while setting up S1 promptly between eNB(s) of new entry, S1 can be made to be able to set up also among other MME/UPE in the same pool, and the load-balancing function in a network can be maintained. &lt;A 3rd embodiment&gt; It is a sequence figure in which Drawing 6 shows the 1st example of S1 setting method of a 3rd embodiment of the present invention. According to a 3rd embodiment, S1 is established based on measurement of moving terminal UE.

0053First, if new eNB is inserted in a plug and a power supply is turned on (S71), new eNB will broadcast new entry to a network on radio (S72). This information signal comprises a reference symbol and information information, for example, and contains as information information, the radio discernment information, for example, cell ID, of new eNB. The scramble of a reference symbol or the information information may be carried out by Scramble ring code peculiar to a cell. under the present circumstances, cell ID or Scramble ring code ID used being alike may be a thing which may be beforehand given from a system and which carries out and is assigned dynamically.

0054An information signal is received by one or more moving terminals UE (un-illustrating) which exist in a cell. Moving terminal UE measures the radio quality of new eNB based on the receiving power level of an information signal, reception SIR, a path loss, etc. (S81). Moving terminal UE notifies cell ID or Scramble ring code ID, and the measurement result of new eNB by an uphill link (S82). Supposing the information signal which tells entry of new eNB10-1 in Drawing 1 is received for example, by one or more moving terminals located near the boundary of circumference eNB10-2 or circumference eNB10-4, The cell ID report and measurement report which these moving terminals UE transmit are received by existing circumference eNB10-2 and 10-4.

0055Each of circumference eNB10-2 which received the report, and 10-4 changes cell ID or Scramble ring code ID into an IP address (S91). Converting methods include the method of asking an OAM server and DNS (domain*name*server) and acquiring the IP address of new eNB. In advance of acquisition of the IP address of new eNB10-1, the statistical work of the report value from a plurality of moving terminals may be carried out. For example, when the average radio quality called for by a statistical work does not reach a predetermined level, acquisition of the IP address of new eNB is good also as composition which is not performed. This is because it is lacking in the necessity of meaning the circumference eNB being comparatively far from new eNB, and stretching X2. For example, the radio quality of new eNB is more than a predetermined level as a result of the statistical work of circumference eNB10-2, In the statistical work of another circumference eNB10-4, when a predetermined level is not reached, circumference eNB10-2 acquires the IP address of new eNB10-1, Although the procedure of X2 establishment protocol is run to new eNB10-1 (S92), circumference eNB10-4 of another side terminates processing, without performing conversion to an IP address.

0056Circumference eNB10-2 notifies the list of MME/UPE20 in which S1 is stretched by X2 now the established first stage to new eNB10-1 (S93). MME/UPE20A-1 in pool 20A, 20A-2, and 20A-3 are contained in this list, for example. New eNB10-1 runs the procedure of S1 establishment protocol to arbitrary MME/UPE under list (S73). after S1 setup may make S1 stretch from other MME/UPE in a pool to new eNB10-1 like S31a of Drawing 2 (a 1st embodiment) -- carrying out -- Drawing [S63 ] 3 (a 2nd embodiment) -- like The eNB node list used to MME/UPE pool 20A may be notified to new eNB10-1. Thereby, new eNB10-1 can add S1 and it can create a circumference list (S75).

0057Drawing 7 is a sequence figure showing the 2nd example of S1 setting method of a 3rd embodiment. Power-on (S71) of new eNB to acquisition (S91) of the IP address in circumference eNB is the same as the 1st example. As for circumference eNB (for example, eNB10-2), a self-office notifies the IP address of acquired new eNB to the higher rank node (for example, MME/UPE20A-2) which has established S1 (S95). Only when the average radio quality called for by a statistical work has reached the predetermined level also in this case as a result of the statistical work, it may have composition which notifies the IP address of new eNB10-1.

0058MME/UPE20A-1 which received the notice runs the procedure of S1 establishment protocol to new eNB10-1 (S101). To [ it may transmit the MME/UPE list and eNB list which are used in the MME/UPE pool to new eNB10-1 via S1 set up ] (S63 of a 2nd embodiment), To other MME/UPE in the same MME/UPE pool, it may point so that S1 may be set up between new eNB10-1 (S31a), or it may point so that S1 may be stretched among other MME/UPE in the same pool to new eNB (S31b). Thereby, new eNB can add S1 and can create a circumference list (S75).

0059According to a 3rd embodiment, S1 optimal net is autonomously set up by radio broadcasting of the information signal being carried out by power-on of new eNB, and measuring this signal by a mobile station by any 1st and 2nd example.

0060Drawing 8 is a schematic block diagram showing the example of composition of base transceiver station (eNB) 10 used by a 3rd embodiment. Base transceiver station (eNB) 10 has transmission and reception section 11, statistical work part 12, a circumference list / S1 list preparing part 13, a circumference list / S1 list attaching part 14, X2 establishment protocol execution part 16, S1 establishment protocol execution part 17, information signal generating part 18, and IP address acquisition part 19. Transmission and reception section 11 contains CN transmission and reception section 11a which transmits and receives by a core network, and radio transmission and reception section 11b which transmits and receives a radio signal between moving terminals.

0061If power-on is carried out when base transceiver station 10 is new eNB10-1, information signal generating part 18 will generate the information signal containing cell ID or Scramble ring code ID, and will carry out broadcasting transmission from radio transmission and reception section 11b. In the case of the technique of the 1st example (Drawing 6), the list (S1 list) of MME/UPE which existing circumference eNB has by CN transmission and reception section 11a is received. S1 establishment protocol execution part 17 sets up S1 between MME/UPE contained in the received information the first stage. If the MME/UPE list and eNB list of [ in the same pool ] are received from connected MME/UPE via this S1, a circumference list / S1 list preparing part 13 will create the circumference list for self-offices, and will add S1. A circumference list and S1 list are held at a circumference list / S1 list attaching part 14.

0062What is necessary is just to wait to receive the suitable MME/UPE list in a pool from MME/UPE, and an eNB list, after flying an information signal on radio when adopting the 2nd technique. Then, S1 establishment protocol execution partS1 is added by 17, and a circumference list / S1 list preparing part 13 performs creation of a circumference list, and renewal of S1 list.

0063When a base transceiver station (eNB) is existing circumference eNB10-2, the cell ID information and the measurement result of new eNB are received from one or more moving terminals by radio transmission and reception section 11b. Statistical work part 12 carries out the statistical work of the received measurement result if needed. When the radio quality of new eNB is more than a predetermined level as a result of a statistical work, in IP address acquisition part 19, cell ID or Scramble ring code ID is changed into the IP address of new eNB. In the 1st technique, based on the obtained IP address, X2 establishment protocol execution part 16 sets up X2 between new eNB(s), and notifies the MME/UPE list of self-offices to new eNB with reference to a circumference list / S1 list attaching part 14. In the 2nd technique, when the radio quality of new eNB is more than a predetermined level as a result of a statistical work, the IP address of new eNB is notified to MME/UPE20 by which S1 is stretched now.

0064If new eNB10 is inserted by such composition and a power supply is switched on, radio broadcasting is carried out, an information signal is based on measurement with moving terminal UE, and it is between optimal circumference eNB and higher rank node (MME/UPE), X2 interface and S1 interface are set up autonomously.

0065The composition of MME/UPE20 of a 3rd embodiment omits the number judgment part 25 of hop from the composition of Drawing 5, and the composition of the More is the same.

0066As mentioned above, according to the 1st - a 3rd embodiment, it becomes possible to set up automatically X2 logic interface and S1 logic interface which the operator judged the relation of the circumference cell and set up manually conventionally. This application claims a right of priority based on the Japan patent application No. 008541 [ 2007 to ] for which it applied on January 17, 2007. The contents of all the are used for application in the their native country case.