CN101507303A - Core network device, radio communication base station device, and radio communication method - Google Patents

Abstract

It is possible to provide a core network device, a radio communication base station device, and a radio communication method which can improve the radio resource use efficiency of the entire network without increasing UE battery consumption. According to the devices and the method, a user quantity counting unit (163) of UPE (160) counts the number of UE which have performed a position registration in each position registration area containing a plurality of cells. A user quantity comparing unit (164) selects MCT if the counted UE quantity is not smaller than a predetermined threshold value and SCT if the counted UE quantity is smaller than the predetermined threshold value, thereby appropriately performing switching between SCT and MCT in accordance with the UE quantity. Only when the SCT is selected by the UPE (160), eNB counts the number of users in the cell managed by the local device.

Description

Core network device, radio communication base station device and wireless communications method

Technical field

The present invention relates to provide core network device, radio communication base station device and the wireless communications method of multimedia broadcast/group broadcast service (Multimedia Broadcast/MulticastService:MBMS).

Technical field

UMTS (Universal Mobile Telecommunications System: universal mobile telecommunications system) be, from the GSM of European standard (Global System for Mobile Communications: global system for mobile communications) evolution and the 3-G (Generation Three mobile communication system) of coming, (Wideband Code Division Multiple Access: Wideband Code Division Multiple Access (WCDMA)) wireless connect technology will provide the mobile communication business of further raising as target based on GSM core network (CoreNetwork:CN) and WCDMA for it.

UMTS provides MBMS.MBMS is, be used for not only broadcasting multimedia data, also to added should business the business user multicast multi-medium data, that further expand.For example, MBMS provides news channel, music channel, movie channel etc.

Basic structure and the treatment step of relevant MBMS have been put down in writing in the non-patent literature 1,2 and 3.

Fig. 1 is illustrated in figure in the 3GPP UMTS network, that support the reference configuration (referencearchitecture) of MBMS.As shown in Figure 1, UMTS is made of terminal (User Equipment:UE) 10, UTRAN (wireless access network) 20 and core network (Core Network:CN) 30.

UTRAN 20 is made of more than one RNS (Radio NetworkSub-systems:RNS), and RNS constitutes by a radio network control apparatus (Radio NetworkController:RNC) 23 and by the more than one Node B (base station) 21 of these RNC 23 management.

RNC 23 is responsible for wireless resource allocation and management, the effect of undertaking the access point (Access Point) of CN 30.

Node B 21 receives the information of transmitting from the physical layer of UE 10 by up link, and gives UE 10 by down link with data forwarding.Node B 21 undertakes the effect of the access point of UE 10 and UTRAN.

UTRAN 20 is for the conversation between UE 10 and the CN 30, constitutes and keeps RAB (Radio Access Bearer:RAB).

30 couples of RAB of CN require terminal room (end-to-end) quality of service (Quality of Service:QoS) to require item, and this RAB supports the qos requirement item that CN 30 sets.Therefore, UTRAN 20 can satisfy terminal room qos requirement item by constituting and keeping RAB.

MBMS is provided by packet switching service.When packet switching service was provided, RNC 23 was connected to SGSN (the Serving GPRS Support Node: Serving GPRS Support Node) 35 and GGSN (Gateway GPRS Support Node: Gateway GPRS Support Node) 37 of CN 30.SGSN 35 support with RNC 23 between communicate by letter, GGSN 37 manage with other such packet switching network of internet between be connected.

MBMS is, utilizes public or private downlink (downward) channel provides stream (Streaming) or the professional downlink dedicated business of background (Background) to a plurality of UE 10.

MBMS is divided into broadcast mode and multicast pattern.In the MBMS broadcast mode, be easy to being positioned at all user's repeating multimedia data of broadcast area (Broadcast Area).Relative therewith, in the MBMS multicast pattern, be easy to being positioned at the particular group of users repeating multimedia data of multicast area (Multicast Area).Here, broadcast area is the zone that can carry out broadcasting service, and multicast area is for carrying out the zone of multicast service.

The user who receives MBMS receives the service announcement (ServiceAnnouncement) that network provides.Here, service announcement is meant, the inventory and the relevant information of the business that provide from now on is notified to UE.In addition, the user receives the service announcements (Service Notification) that network provides.Here, service announcements is meant, the information of the relevant broadcast data that is forwarded is notified to UE.

In addition, the user of the MBMS of expectation receiving group pattern need join in the multicast adding group (Multicast Subscription Group) specially.Multicast adding group is to have passed through the group that adds the user of step.

Add user in the multicast adding group in order to receive specific multicast service, can participate in (Joining) multicast group, promptly received the user group of specific multicast service.Multicast group is the user's of reception specific multicast service group.Participate in, the MBMS multicast exciting that is otherwise known as (Multicast Activation) is in the multicast group of collaborating to gather for the reception specific multicast service.Therefore, the user can receive the specific multicast data by MBMS multicast exciting (or participation).

RNC 23 is forwarded to UE 10 with the MBMS user data via the user plane (user plane) of UTRAN agreement and by Node B 21.UTRAN 20 constitutes for the conversation between UE 10 and the CN 30 and keeps radio bearer, so that the transmitting MBMS user data.The MBMS radio bearer is only transmitted by down link.

The MBMS radio bearer is only undertaken particular UE is transmitted the effect of user data that is forwarded to the specific MBMS of UTRAN 20 from CN 30.

In addition, under the situation of multicast pattern, UTRAN 20 need confirm the existence of UE to the whole service zone in order only the Node B 21 that has the user to be broadcast the MBMS user data.Therefore, the number of UTRAN20 counting (Counting) UE.UTRAN 20 when perhaps specific MBMS group being carried out paging (Paging), is notified to UE10 with the fact of counting utilizing the MBMS Common Control Channel that the information of relevant MBMS is provided.

From the service announcements of relevant MBMS, receive after the information that this business is counted, for the fact of oneself being wished the reception of this MBMS is notified to UTRAN 20, UE 10 transmits RRC connection request (Connection Request) by up link (uplink) common signal channel to UTRAN, sets RRC and connects (the RRC entity of UE 10 is connected with the RRC inter-entity of UTRAN 20).Here, utilize RRC connection request message, UE 10 is wished that the fact that receives this MBMS is notified to UTRAN20.

Therefore, UTRAM 20 has transmitted the UE 10 of RRC connection request message by identification, distinguishes to have the user who requires specific MBMS in the sub-district, even when having only a user, also sets the MBMS radio bearer.

, at present, in 3GPP, follow-on core network and Radio Access Network are studied, therewith correspondingly, the retransmission method of relevant MBMS is also studied following two kinds of retransmission methods as the candidate of specification.

Fig. 2 represents the schematic diagram of two kinds of retransmission methods.First method is called as single sub-district and transmits (SingleCell Transmission:SCT), and it is counted in order to confirm having or not of user shown in the right side of Fig. 2, only the sub-district that has the user is sent data.And, when place such as cell edge (cell edge) quality deterioration, provide and retransmit or change modulation system, thereby improve user's the quality of reception.

Second method is called as many sub-districts and transmits (Multi Cell Transmission:MCT), it is shown in the left side of Fig. 2, with being arranged, no user has nothing to do, belong to same frequency zone (Single FrequencyNetwork:SFN, the single carrier network) a plurality of base station synchronization ground sends data, assembles the quality of reception that improves the user by the minizone branch.

[non-patent literature 1] 3GPP TS 23.246 " 3rd Generation PartnershipProject; Technical Specification Group Services and System Aspects, MultimediaBroadcast/Multicast Service (MBMS), Architecture and functional description ", 2006-06

[non-patent literature 2] 3GPP TS 25.346 " 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Introduction of theMultimedia Broadcast Multicast Service (MBMS) in the Radio Access Network (RAN); Stage 2 ", 2006-06

[non-patent literature 3] 3GPP TS 25.331 " 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Radio Resource Control (RRC), Protocol Specification ", 2006-06

Summary of the invention

Problem to be addressed by invention

Yet, in the above-mentioned method that MBMS is provided according to service selection MCT or SCT, so there are the following problems.

In MCT, because just to SFN zone repeating multimedia data, so under the less situation of the number of users that is positioned at the SFN zone, it is many that the data of the sub-district that do not have the user are broadcast quantitative change, thereby the utilization ratio of the Radio Resource of whole network is reduced.

In addition, in SCT, in order only particular group of users to be transmitted data and to count, but in this counting the user need with Node B between set up RRC and be connected, thereby consuming cells.Therefore, be positioned under the more situation of certain regional number of users, all have the user in the most sub-district in this zone, thereby compare, might increase and carry out amount of battery consumption unnecessary segment count, UE with MCT.

Purpose of the present invention is, core network device, radio communication base station device and wireless communications method are provided, and do not increase the battery consumption of UE and improves the utilization ratio of the Radio Resource of whole network.

Be used to solve the scheme of problem

The structure that core network device of the present invention adopts comprises: number of users counting unit is unit with the position registration area, and counting is participated in the number of users of multimedia broadcast/group broadcast service (MBMS); The number of users comparing unit, the described number of users that counts out and the threshold value of regulation are compared, at described number of users is that described threshold value is when above, select many sub-districts to transmit, and at described number of users during less than described threshold value, select single sub-district to transmit, described many sub-districts are transmitted and are, the a plurality of radio communication base station devices that belong to the same frequency zone are the transmitting MBMS forwarding of data synchronously, transmit described single sub-district is to comprise the user's who has participated in described MBMS single radio communication base station device transmitting MBMS forwarding of data in the sub-district; And notification unit, the radio communication base station device that is notified to the subordinate is transmitted in selected many sub-districts forwarding or single sub-district.

The structure that radio communication base station device of the present invention adopts comprises: acquiring unit, obtain the indication of many sub-districts forwarding or the indication that transmit single sub-district from core network device, described many sub-districts are transmitted and are, the a plurality of radio communication base station devices that belong to the same frequency zone are repeating multimedia broadcasting/packet service (MBMS) forwarding of data synchronously, transmit described single sub-district is to comprise the user's who has participated in MBMS single radio communication base station device transmitting MBMS forwarding of data in the sub-district; Counting unit only when having obtained the indication of transmitting single sub-district, is counted in the sub-district that this device is managed; And retransmission unit, the result of described counting, transmitting MBMS data in the sub-district that the user exists.

Wireless communications method of the present invention comprises: number of users counting step, core network device are unit with the position registration area, and counting is participated in the number of users of multimedia broadcast/group broadcast service (MBMS); The number of users comparison step, the described number of users that counts out and the threshold value of regulation are compared, at described number of users is that described threshold value is when above, select many sub-districts to transmit, and at described number of users during less than described threshold value, select single sub-district to transmit, described many sub-districts are transmitted and are, the a plurality of radio communication base station devices that belong to the same frequency zone are the transmitting MBMS forwarding of data synchronously, transmit described single sub-district is to comprise the user's who has participated in described MBMS single radio communication base station device transmitting MBMS forwarding of data in the sub-district; Notifying process is transmitted selected many sub-districts or the radio communication base station device that is notified to described core network device subordinate is transmitted in single sub-district; Obtaining step, radio communication base station device obtains the indication of described many sub-districts forwarding or the indication that transmit described single sub-district from core network device; Counting step only when having obtained the indication of transmitting single sub-district, is counted in the sub-district that described radio communication base station device is managed; And the forwarding step, the result of described counting, transmitting MBMS data in the sub-district that the user exists.

The effect of invention

According to the present invention, can not increase the battery consumption of UE and improve the utilization ratio of the Radio Resource of whole network.

Description of drawings

Fig. 1 is illustrated in figure in the 3GPPUMTS network, that support the reference configuration of MBMS.

Fig. 2 is the figure of the notion of expression many sub-districts forwarding and the forwarding of single sub-district.

Fig. 3 is the figure of structure of the network of expression embodiment of the present invention 1.

Fig. 4 is the block diagram of the structure of expression MME shown in Figure 3.

Fig. 5 is the block diagram of the structure of expression UPE shown in Figure 3.

Fig. 6 is the sequential chart that expression adds the adding step of multicast adding group.

Fig. 7 is the sequential chart that the expression session begins step.

Fig. 8 is expression switches to the mode switch step of MCT from SCT a sequential chart.

Fig. 9 is the block diagram of structure of the eNB of expression embodiment of the present invention 1.

Figure 10 is the flow chart that is illustrated in the counting step again among the eNB of embodiment of the present invention 2.

Figure 11 is the block diagram of structure of the eNB of expression embodiment of the present invention 2.

Figure 12 is the block diagram of structure of the UPE of expression embodiment of the present invention 3.

Figure 13 is the sequential chart that the session of expression embodiment of the present invention 3 begins step.

Figure 14 is that the MBMS between the eNB of expression embodiment of the present invention 4 provides the sequential chart of the inquiry of situation.

Figure 15 is the block diagram of the structure of expression embodiment of the present invention 5 and 6 UE.

Figure 16 is the block diagram of the structure of expression embodiment of the present invention 5 and 6 eNB.

Embodiment

Below, explain embodiments of the present invention with reference to accompanying drawing.

(execution mode 1)

Fig. 3 is the figure of structure of the network of expression embodiment of the present invention 1.The structure of network shown in Figure 3 comprises terminal (User Equipment:UE) 100, radio base station apparatus (Evolved NodeB:eNB) 120, mobile management device (Mobility Management Entity:MME) 140, user plane device (UserPlane Entity:UPE) 160 and broadcast/multicast service center (Broadcast Multicast ServiceCenter:BM-SC) 180, and eNB 120, MME 140 are connected by IP network respectively with UPE 160.

ENB 120 undertakes wireless resource allocation and management, and receives the information of transmitting from the physical layer of UE100 by up link, and gives UE 100 by down link with data forwarding.ENB 120 undertakes the effect of the access point of UE 100 and Radio Access Network.

MME 140 management is the position of the UE 100 of unit with position registration area (Tracking Area:TA), and with UE 100 between carry out setting, correction and the release of relevant RAB signaling.MME140 remains on the context (context) of the MBMS of UE 100 that be assigned with in the network Connection Step of UE 100, relevant.In certain MBMS zone, there are a plurality of MME 140, the MME difference that each user connected.

UPE 160 has the function with the gateway of external network, according to the setting of RAB downlink packets is forwarded to the eNB that UE 100 is connected, and according to the destination address of grouping uplink packet is forwarded to suitable external network.Only there is one in UPE 160 for a MBMS in certain MBMS zone, keep the context (context) relevant with MBMS.

BM-SC 180 is between MBMS content server and UPE 160, and information that begins and finish or MBMS data with relevant conversation type, business are forwarded to UPE 160.

Fig. 4 is the block diagram of the structure of expression MME 140 shown in Figure 3.In Fig. 4, input unit 141 will be given subscriber information management unit 142 from the signalisation of BM-SC 180, UPE 160 and eNB 120 inputs.

Subscriber information management unit 142, with the MBMS receptivity of UE 100 and from the MBMS registration response of BM-SC 180 notices performance that comprised, the desired UE 100 of this business compare.As this result relatively,, then will should business be notified to number of users counting unit 143 with the identifier of the affiliated position registration area of relevant UE 100 if the MBMS receptivity of UE 100 is higher than the performance of the desired UE 100 of this business.In addition, if the MBMS receptivity of UE 100 is lower than the performance of the desired UE 100 of this business, then to the termination of BM-SC 180 and UE 100 notifier processes.

Number of users counting unit 143 is that each professional number of users is participated in unit count with the position registration area, and business and position registration area identifiers according to 142 notices from the subscriber information management unit upgrade number of users.Number of users after the renewal is output to output unit 144.Like this, MME 140 can utilize the Location Registration of UE to count number of users.

Output unit 144 will be included in the MBMS register update from the number of users of number of users counting unit 143 outputs, and the MBMS register update is sent to UPE 160.

Fig. 5 is the block diagram of the structure of expression UPE 160 shown in Figure 3.In Fig. 5, input unit 161 will be given parameter unit 162 and number of users counting unit 163 from the signalisation of BM-SC 180, MME 140 and eNB 120 inputs.Especially, input unit 161 each professional MBMS number of users that will be comprised in the MBMS register update, that with the position registration area be unit is notified to number of users counting unit 163.

162 management of parameter unit, are exported from the business datum of BM-SC 180 inputs from output unit 165 according to the setting of parameter about the various parameters of data path.

Number of users counting unit 163 is that each professional number of users is participated in unit count with the position registration area.Owing to there are a plurality of MME 140 in the MBMS zone, the number of users that UPE 160 managed is the aggregate value from the number of users of each MME notice.Therefore, UPE 160 can be with the position registration area unit hold the MBMS region memory this professional number of users of participation.The number of users counting unit 163 that receives the MBMS register update will be participated in this professional number of users renewal, and the number of users after will upgrading outputs to number of users comparing unit 164.

Number of users and pre-set threshold that number of users comparing unit 164 is relatively exported from number of users counting unit 163 each position registration area.Result relatively is threshold value when above at number of users, selects the forward mode of MCT as this position registration area, and less than threshold value the time, selects SCT.MCT that expression is selected or the identifier of SCT are output to output unit 165.

As the output unit 165 of notice parts will be from the parameter unit 162 outputs business datums, output to eNB 120 from the expression MCT of number of users comparing unit 164 outputs or the identifier of SCT.

Below, illustrate that the user adds the adding step of multicast adding group.Fig. 6 is the sequential chart that expression adds the adding step of multicast adding group.

In step (following province is " ST " slightly) 201, the UE 100 that receives service announcement transmits multicast to MME 140 and adds requirement.This multicast adds and includes the identifier that the multicast group of adding is wished in expression in the requirement.

In ST202, receive the step of checking and approving of carrying out the user between MME 140 that multicast add to require and the BM-SC 180.This is checked and approved step and carries out based on user's adding contract information, judges whether the user can accept business really.

Checking and approving under the situation that step successfully is through with, in ST203, MME 140 is sent to UE 100 with the request of MBMS context activation.

In ST204, the UE 100 that receives the request of MBMS context activation requires to be sent to MME 140 with the MBMS context activation.In the MBMS context activation requires, comprise the performance etc. that is used to receive MBMS of UE 100 self.

Receive the MME 140 of MBMS context activation requirement, when first participant that this UE 100 is these professional multicast group, in ST205, the MBMS registration is required to be sent to BM-SC 180.When first participant that this UE 100 is not this professional multicast group, do not carry out the processing of ST205 and ST206.The identifier that in MBMS registration requires, comprises the UPE 160 that is used to broadcast the MBMS data.

In ST206, receive the MBMS registration response that BM-SC 180 that MBMS registration requires will comprise performance that should the desired UE 100 of business and send to MME 140.

In ST207, MME 140 is that each professional number of users is participated in unit count with the position registration area, upgrades the MME number of users.In ST208, MME 140 is sent to UPE 160 with the MBMS register update.Comprise renewal in the MBMS register update after is the MBMS number of users of unit with the position registration area.

In ST209, UPE 160 be unit count MBMS region memory with the position registration area the number of users of participation business, upgrade the UPE number of users.In ST210, the fact that MME 140 will accept the MBMS context activation is sent to UE.

By above processing, the adding step that the user adds multicast adding group finishes.In addition, upgrade for the MME number of users, be updated too when the user breaks away from multicast group and when the renewal of the position registration area of UE 100, this renewals result is notified to UPE 160, also carries out the renewal of UPE number of users in UPE 160.

Then, use Fig. 7 to illustrate that session begins step.After the business that detects certain MBMS began, in ST301, BM-SC 180 began requirement with session and is sent to UPE 160.

In ST302, receive session and begin in the number of users comparing unit 164 of UPE 160 of requirement, to each position registration area relatively MBMS region memory, the participation number of users and the pre-set threshold of this business.Participating in number of users is threshold value when above, selects the forward mode of MCT as this position registration area, and less than threshold value the time, selects SCT.

When having selected MCT, when just in each position registration area, having many users, in ST303 and ST304, by output unit 165, service announcements is notified to eNB 120 and UE100, UE 100 is in any place of this position registration area and can both accepts business, and does not need follow-up processing.

On the other hand, when in number of users comparing unit 164, having selected SCT, when just in each position registration area, only having a few users, in order only the eNB 120 that has the user to be broadcast the MBMS data, in ST303 and ST304, carry out step, i.e. counting in the existence of whole position registration domain validation UE.

In addition, the session in ST303 begins to include in the requirement identifier of expression MCT or SCT, receives eNB 120 that session begins requirement and judges in view of the above and carry out service announcements or count.In addition, include the information whether expression is counted too in the Notification/Counting of ST304 notice, UE 100 judges whether response count in view of the above.

UE 100 receives the information that this business is counted from the service announcements of relevant MBMS after,, in ST305, eNB120 is set RRC connect for oneself being wished the fact that receives this MBMS is notified to eNB 120.Here, utilize RRC connection request message, UE 100 is wished that the fact that receives this MBMS is notified to eNB 120.

ENB120 has transmitted the UE of RRC connection request message by identification, identifies to exist in the sub-district to require the user of specific MBMS, even have only a user, also sets up the MBMS radio bearer in ST306.

In ST307, in order to constitute the IP multicast tree in the IP network of 160 of eNB 120 and UPE, eNB 120 participates in requirement with multicast group and is sent to UPE 160.

Receive multicast group and participate in each ip router and the UPE 160 of requirement, participate in the output interface at this professional user place, only the output interface of needs is transmitted this MBMS data later on by storage.

By above-mentioned processing, a series of session begins step and finishes, and the MBMS data of exporting from BM-SC 180 are sent to UPE 160, only are sent to the eNB120 that there is the user in MBMS from UPE 160, finally are sent to the UE 100 that participates in multicast group.

Then, illustrate by what above-mentioned session began MBMS data that step set and broadcast the keeping of path.The UE 100 that begins to have set up among the ST305 of step in session is connected with the RRC of 120 of eNB and is limited at the control plane that only sends and receive control signal.

The RRC connection is limited to control plane to be meant, have only control plane to be in the state of activation, just only have Radio Link control (Radio Link Control:RLC) and the relevant entity of medium access control (Media Access Control:MAC) with the transmission of RRC message and reception, and do not carry out fully UE100 user plane data transmission and receive the state of the report (CQI report) of required channel quality and the supervision of descending Common Control Channel etc.

Therefore, as long as UE 100 does not move, UE 100 does not carry out the transmission and the reception of signal fully except the control signal and business datum that receive relevant MBMS, thereby can suppress amount of battery consumption low.And, with the discontinuous reception in the interval that is suitable for this MBMS (DRX) MBMS data, thereby can suppress amount of battery consumption lower.

In addition, only control plane does not provide the MME 140 of any information to the location management that carries out UE 100 for the state that activates is limited between eNB 120 and the UE 100, so MME 140 continuation are the location management that unit carries out UE 100 with the position registration area.

Because eNB 120 keeps being connected with the RRC of UE 100, so can be that unit carries out location management to UE 100 with the sub-district.Therefore, when UE 100 moves to other adjacent eNB, carry out common handover step, make with the RRC of UE 100 to be connected the eNB that transfers to mobile destination.Thus, the eNB of mobile destination detects MBMS user and moves to the subordinate of oneself, if this business is not provided then exports multicast group and participate in requirement, thereby newly provides professional.In addition, if there is no participate in other UE 100 of multicast group, then the eNB of moving source shows disengaging from this multicast group to UP E160.

Generally speaking, the UE100 that is in state of activation measures the quality of reception of neighbor cell, and with its result termly or each incident be notified to eNB 120 (event).

Here, suppose that UE 100 is positioned at the boundary vicinity of neighbor cell.Receive from the eNB 120 of the neighbor cell quality of reception measurement result of UE 100 reports, detect the boundary vicinity that UE 100 is positioned at certain neighbor cell.

Generally speaking, in SCT, the quality of reception that is positioned at the user of cell edge can deterioration.So, when the user is positioned at cell edge, pattern is switched to MCT from SCT, carry out the minizone branch and assemble.

Fig. 8 is that expression switches to the sequential chart of the mode switch step of MCT from SCT, and Fig. 9 is the block diagram of structure of the eNB 120 of expression embodiment of the present invention 1.In Fig. 8, in ST401, UE100 is according to the quality of reception of predetermined conditions measurement peripheral cell, and this measurement result is notified to s-eNB (eNB of moving source).

In ST402, receive the s-eNB of measurement result, there is UE 100 in detection on the border with certain neighbor cell based on measurement result, in ST403, will be sent to t-eNB (eNB of mobile destination) to the participation request of multicast group.

In ST404, receive the t-eNB that multicast group is participated in request, when self having the resource of participating in this MBMS,, multicast group is participated in requirement be sent to UPE 160 by output unit 125.In multicast group participation requirement, comprise the identifier of s-eNB and the information that expression switches to MCT.

In ST405, receive multicast group and participate in the UPE 160 of requirement forward mode is switched to MCT from SCT, in ST406, dispatch so that s-eNB and t-eNB dateout synchronously, and this scheduling result is notified to s-eNB and t-eNB respectively.

Receive the notified schedule information of parameter unit 122 storages of the s-eNB and the t-eNB of scheduling result, and be notified to output unit 125.The output unit 125 of s-eNB and t-eNB transmits the MBMS data with predetermined timing respectively, the signal that UE 100 receives after synthesizing from a plurality of sub-districts, thus improve the quality of reception.

The structure of above-mentioned eNB 120 is described here.In Fig. 9, input unit 121 will be given parameter unit 122, cell edge detecting unit 123 and multicast processing unit 124 from the signalisation of UE 100, MME 140, UPE 160 and eNB 120 inputs.

The various parameters that 122 management of parameter unit set by the signaling with UE 100, MME 140, UPE 160 and eNB 120 according to by parameter unit 122 designated parameters, are exported the MBMS data from the output unit 125 as the forwarding parts.

The cell edge detecting unit 123 that receives the s-eNB of measurement result detects the border that UE 100 is positioned at certain neighbor cell, and the identifier of this neighbor cell is outputed to multicast processing unit 124.

Multicast processing unit 124 when this device is s-eNB, based on the identifier of the neighbor cell of exporting from cell edge detecting unit 123, will be sent to the t-eNB of management neighbor cell to the participation request of multicast group by output unit 125.

In addition, multicast processing unit 124, when this device was t-eNB, the receiving group group was participated in request, if having the resource of participating in this MBMS, then by output unit 125 multicast group was participated in requirement and was sent to UPE 160.

Like this, according to execution mode 1, each the position registration area counting that comprises a plurality of sub-districts has been carried out the UE number of Location Registration, if more than the threshold value of the UE number that counts out for regulation, then select MCT, if the UE number that counts out is less than the threshold value of regulation, then select SCT, thereby can suitably switch SCT and MCT, therefore can cut down the unnecessary data that produce because of MCT and broadcast according to the UE number, and can cut down the unnecessary counting that produces because of SCT, thereby can reduce battery consumption.

In addition, in the present embodiment, in UPE 160 to each position registration area with the MBMS region memory this professional number of users of participation and the comparing of pre-set threshold, but, also can be in having a plurality of MME, similarly carry out the comparison of number of users by selected certain specific MME that goes out.

In addition, in the present embodiment, detect the border that UE 100 is positioned at certain neighbor cell from quality of reception measurement result from UE 100, but, also can utilize NACK, eNB 120 participates in multicast group to the neighbor cell request when receiving NACK, described NACK is used for urging when the quality of reception deterioration of UE 100 eNB 120 to retransmit the incomplete data that is transmitted.

In addition, in the present embodiment, using with position registration area and carry out number of users comparison process among the ST302 shown in Figure 7 as the UE number of unit, still, can be that unit compares with a plurality of position registration areas also.

(execution mode 2)

In embodiments of the present invention 2, illustrate selecting SCT and carried out after the counting that UE 100 shifts the situation for idle (idle) state once more.

Owing to can't determine to be in the moving of UE 100 of idle condition on the network,, be that the unit judgement is to carry out keeping or deleting of MBMS radio bearer with the sub-district so count (recounting: be equal to counting) termly again.

Generally speaking, because when counting, the response message that requires the UE of MBMS concentrates on up channel simultaneously and increases interference and load to up link, so set response probability (Probability Factor:PF).Become the UE of the following random number of this PF value transmission RRC response message by having only to have produced, thereby avoid responding simultaneously.

Figure 10 is the flow chart that is illustrated in the counting step again among the eNB 130 of embodiment of the present invention 2.And Figure 11 is the block diagram of structure of the eNB 130 of expression embodiment of the present invention 2.Below, use these figure that counting step again is described.

ENB 130 will be notified to stored counts comparing unit 131 from the input signal of UE 100 by as the input unit 121 that obtains parts.

In ST501, parameter selection unit 132 is set initial PF value (parameter) when beginning again counting step, in ST502, by the Notification/Counting notice, selected initial PF value is sent to UE 100 by output unit 125.In addition, receiving the UE 100 of PF value, random number that self produced and the PF value that receives are compared, is PF value transmission response message when following in random number, and, then waits by the time to receive till the next PF value during greater than the PF value in random number.

In ST503, the response message that the input unit of eNB 130 121 receives from UE 100, and the response message that receives is notified to stored counts comparing unit 131.

In ST504, carry out stored counts as the number of 131 pairs of response messages that receive of stored counts comparing unit of counter block, in ST505, accumulate relatively whether the count value that is more than the pre-set threshold.In the stored counts value is more than the threshold value when ("Yes"), then transfers to ST508, and during less than threshold value ("No"), then transfers to ST506 in the stored counts value.

In ST506, judge by stored counts comparing unit 131 whether the tentative number of times of ST502 to ST505 reaches predefined number of times (setting).When tentative number of times reaches setting ("Yes"), then transfer to ST509, and when tentative number of times does not reach setting ("No"), then transfer to ST507.

In ST507,, select the PF value of its value greater than the PF value of this use by parameter selection unit 132 because tentative number of times does not reach setting.Owing in next time tentative, selected, so the number of the UE 100 of measurable transmission response message is more than this big PF value.After trying several times, the stored counts value is that threshold value is when above in the judgement of ST505, stored counts comparing unit 131 notifies again count cycle selected cell 133 to select the count cycle again, and notifying parameters selected cell 132 selections initial PF value next time.

In ST508, because eNB 130 is the MBMS user who has plurality in the sub-district that is held in the subordinate, in the more sub-district of number of users, it is higher that certain user continues to stay the probability of this sub-district, therefore by count cycle selected cell 133 will the count cycle be set longlyer again again.Thus, can reduce the battery consumption of UE 100.In addition, for counting again next time,, set initial PF value less by parameter selection unit 132.Thus, can avoid the congested of up link.

Be judged to be tentative number of times when reaching setting in ST506, in ST509, stored counts comparing unit 131 notifies again count cycle selected cell 133 to select the count cycle again, and the initial PF value selected next time of notifying parameters selected cell 132.Because eNB 130 is only having less MBMS user in the sub-district that is held in the subordinate, in the less sub-district of number of users, also user that might be all leaves this sub-district, and therefore count cycle selected cell 133 is set the short count cycle again (default value) again.Thus, the situation of number of users vanishing in the detected cells is rapidly broadcast the MBMS data of this sub-district by stopping, and can improve the utilization ratio of the Radio Resource of whole network.In addition, owing to the probability that up link generation in counting again next time is congested is less, so parameter selection unit 132 is set initial PF value bigger.Can be reduced to again the required time till the finishing of counting thus.

As mentioned above, according to execution mode 2, based on the counting again that carries out at SCT, and determine in the sub-district number of users more for a long time, by will be again the count cycle set the long battery consumption that reduces UE, and by initial PF value is set less the minimizing because of responding interference and the load that causes simultaneously to up link.On the other hand, number of users more after a little while in being judged to be the sub-district, by the count cycle is set shortly and situation number of users vanishing in the rapid detected cells again, if stop the MBMS data of this sub-district are broadcast, then can improve the utilization ratio of the Radio Resource of whole network, and, by initial PF value being set to such an extent that can be reduced to again the required time till the finishing of counting greatly.

In addition, in the present embodiment number of users in the sub-district is divided into two kinds of more or less situations and is illustrated, but the present invention is not limited to this, also number of users in the sub-district can be divided into two or morely, set again count cycle and PF value.

(execution mode 3)

In embodiments of the present invention 3, illustrate selecting SCT and carried out according to the distribution of the eNB 120 that has MBMS user, selecting the situation of forward mode once more after the counting.

Figure 12 is the block diagram of structure of the UPE 170 of expression embodiment of the present invention 3.But, give the label identical to the common part of Figure 12 and Fig. 5, and omit its detailed description with Fig. 5.

In Figure 12, input unit 171 will be given parameter unit 162, number of users counting unit 163 and eNB distribution identifying unit 172 from the signalisation of BM-SC 180, MME 140 and eNB 120 inputs.Especially, input unit 171 is notified to number of users counting unit 163 with each the professional MBMS number of users that is comprised in the MBMS register update, with the position registration area be unit.And, with multicast group participate in comprised in the requirement, expression exists the eNB identifier of MBMS user's eNB 120 to be notified to eNB distribution identifying unit 172.

ENB distribution identifying unit 172 is judged the distribution of the eNB 120 that has MBMS user based on the eNB identifier from input unit 171 output, just to the distribution of whole position registration area.As the result who judges, when existing the distribution of MBMS user's eNB 120 to satisfy predetermined conditions, select MCT as the forward mode in this position registration area, when not satisfying condition, continue to select SCT.MCT that expression is selected or the identifier of SCT are output to output unit 173.

As the output unit 173 of notice parts, will be from the parameter unit 162 outputs business datums, output to eNB 120 from the identifier of the expression MCT of number of users comparing unit 164 outputs or SCT and from the expression MCT of eNB distribution identifying unit 172 outputs or the identifier of SCT.

Then, use Figure 13 to illustrate that the session of embodiment of the present invention 3 begins step.But, give the label identical to the common part of Figure 13 and Fig. 7, and omit its detailed description with Fig. 7.

In Figure 13, in ST601, in order to constitute the IP multicast tree in the IP network of 170 of eNB 120 and UPE, eNB 120 participates in requirement with multicast group and is sent to UPE 170.At this moment, eNB 120 comprises the identifier of expression self as the eNB identifier in multicast group participation requirement.

Receive multicast group and participate in each ip router of requirement, the output interface at this professional user place is participated in storage.

In ST602, receive multicast group and participate in the UPE 170 of requirement, to participate in the eNB identifier that is comprised in the requirement in multicast group and temporarily be stored in the eNB distribution identifying unit 172, and, obtain multicast group from all eNB 120 that have MBMS user and participate in requirement by this counting.Here, eNB distribution identifying unit 172 calculates the ratio of total eNB number of the eNB number that has MBMS user and whole position registration area.In this ratio is pre-set threshold when above, select MCT as the forward mode in this position registration area, and it selects SCT less than threshold value the time.

When having selected MCT, transfer to ST603, and when having selected SCT, the output interface at this professional user place is participated in UPE 170 storages.When continuing to have selected SCT, by above-mentioned processing, to finish a series of session and begin step, the MBMS data of exporting from BM-SC 180 are sent to UPE170, only be sent to the eNB 120 that has MBMS user from UPE 170, finally be sent to the UE 100 that participates in multicast group.

UPE 170 will select the fact of SCT to be notified to eNB 120 in ST303.So in ST603, UPE 170 will represent that the forward mode change notice of the switching from SCT to MCT is sent to all eNB 120 in the position registration area.

In addition, forward mode at ST603 changes the information that also comprises the identifier of representing MCT or SCT in the notice and represent whether to count, the eNB 120 that receives forward mode change notice judges whether to change forward mode in view of the above, and, judge whether after this reception, to count termly.

By above-mentioned processing, finish a series of session and begin step, the user who in each position registration area, has only minority, but the MBMS user of minority is not distributed under the situation of position registration area with having omission, owing to finally selected MCT, can both accept business so UE 100 is positioned at any place of this position registration area.

In addition, as implement explanation in the mode 1, number of users at each position registration area is to have selected more than the threshold value under the situation of MCT, do not need to count, but have less than the MBMS user of threshold value and minority at the number of users of each position registration area and not to be distributed in position registration area with omitting and to have selected under the situation of MCT, exist the ratio of total eNB number of MBMS user's eNB number and whole position registration area to change, count termly so consider above-mentioned situation because of moving of UE 100.That is to say, carry out the processing of ST304 to ST601 shown in Figure 13 termly.Thus, all carry out the eNB distribution determination processing of ST608 during UPE 170 each countings, carry out the selection of forward mode based on its result.

Like this, according to execution mode 3, but the number of users of each position registration area is not distributed under the situation of position registration area less than the MBMS user of threshold value minority with having omission, by forward mode is switched to MCT from SCT, and can cut down this moment and the switching of the forward mode from SCT to MCT is related, between eNB and the signaling amount between eNB and core network device, and the utilization ratio of Radio Resource is not reduced.

In addition, in the present embodiment, eNB distribution identifying unit 172 is based on the ratio of total eNB number of eNB number that has MBMS user and whole position registration area, carried out the switching of forward mode, but also can preestablish the configuration information of the eNB 120 of eNB identifier and reality, judge the distribution situation of physical presence MBMS user's eNB 120 from the eNB identifier of being notified, thereby carry out the switching of forward mode.

In addition, in the present embodiment, the switching of forward mode has been carried out in the distribution of eNB distribution identifying unit 172 eNB that has MBMS user 120 when having carried out counting, but also can there be the distribution of MBMS user's eNB 120 based on result's judgement of counting several times, carries out the switching of forward mode.

(execution mode 4)

In embodiments of the present invention 4, the action that cell edge carried out of the sub-district on the border that is positioned at the position registration area of having selected MCT is described.

Cell edge in the sub-district on the border that is positioned at the position registration area of having selected MCT, at the eNB 120 on the border that is positioned at the position adjacent registration area (for example, under the situation of Fig. 3, be equivalent to eNB3 and eNB5) do not provide under the situation of business, can't carry out the minizone branch and assemble, the professional quality of reception might deterioration.So, in the present embodiment, be positioned at the eNB 120 on the border of position registration area, the N-eNB1～n on the border that is positioned at the position adjacent registration area is inquired about MBMS termly situation is provided.

Figure 14 is the sequential chart that the MBMS of 120 of eNB that is positioned at the border of different position registration areas provides the inquiry of situation.Be arranged in the multicast processing unit 124 of eNB 120 on the border of position registration area, preestablish the fact on the border that self is positioned at position registration area.

In Figure 14, in ST701, providing with the MCT pattern under the situation of MBMS, the multicast processing unit 124 of eNB 120 is by the inquiry of output unit 125 outgoing traffics, so that provide situation to the N-eNB1～n inquiry MBMS on the border that is positioned at the position adjacent registration area.In addition, in service inquiry, comprise the service identifier of representing this MBMS.

In ST702, the input unit 121 that receives the N-eNB 1～n of service inquiry outputs to multicast processing unit 124 with service identifier.The situation that provides of business that service identifiers are represented is provided for multicast processing unit 124, its result is included in the service response, and outputs to the eNB 120 that has carried out service inquiry by output unit 125.

In ST703, receive the input unit 121 of the eNB 120 of service response, provide situation to output to multicast processing unit 124 MBMS of N-eNB 1～n of being comprised in the service response.Multicast processing unit 124 provides situation according to the MBMS of N-eNB 1～n, judges the N-eNB 1～n that needs to participate in this MBMS.Here, the N-eNB 1～n that need to participate in this MBMS is meant, this MBMS is not provided, and with the position adjacent registration area in require the user's of MBMS the adjacent N-eNB 1～n in sub-district with existence.

Need to participate in N-eNB 1～n and the specific eNB120 of this N-eNB 1～n of this MBMS,, finish participation this MBMS by carrying out the later processing of ST403 shown in Figure 8.

Like this, according to execution mode 4, N-eNB 1～n that 120 couples of eNB that are positioned at the border of position registration area are positioned at the border of position adjacent registration area inquires about MBMS termly provides situation, and make and do not provide the N-eNB of this MBMS 1～n to identify oneself with multicast group, thereby can be reduced in the deterioration of the professional quality of reception of cell edge of the sub-district on the border that is positioned at the position registration area of having selected MCT.

In addition, inquire about MBMS termly by N-eNB1～n in the present embodiment situation is provided the border that is positioned at the position adjacent registration area, thereby judge the necessity of this MBMS of participation of N-eNB 1～n, but all MBMS users that also can make the place, sub-district on the border that is arranged in the position registration area of having selected MCT shift and are state of activation, and similarly carry out cell edge with execution mode 2 and detect, thereby make N-eNB 1～n participate in this MBMS.

(execution mode 5)

In embodiments of the present invention 5, when the foot of the UE that the is in state of activation 100 transmission measurement reports (Measurement Report) in the sub-district of having selected SCT is described.

Selected the UE that is in state of activation 100 in the sub-district of SCT to measure the quality of reception of neighbor cells, and with this measurement result termly or each event be notified to eNB 200.Below, the notice of quality of reception measurement result is called " measurement report (Measurement Report) ".Thus, eNB 200 judges UE 100 is positioned at which edge of sub-district, and the MCT pattern is participated in corresponding neighbor cell request.

Here, promptly whether normally receive the MBMS data independence with the reception result of MBMS data, measurement report termly or each event be transmitted.Therefore, although can normally receive the MBMS data, UE 100 still might transmit unnecessary measurement report, thus the waste battery.On the contrary, although detect the damaged of MBMS data, also might till the transmission regularly of measurement report, also need some times, thereby keep the bad state of the quality of reception.

So in the present embodiment, when the UE 100 that exists at cell edge detected the data defect of MBMS, UE 100 was sent as opportunity with the NACK of the repeating transmission that requires these damaged data, the measurement report of neighbor cell is sent to eNB 200.

Figure 15 is the block diagram of structure of the UE 100 of expression embodiment of the present invention 5.In Figure 15, input unit 101 will be input to from the MBMS packet that eNB 200 receives and receive data judging unit 102, and will output to received power measuring unit 103 from the reference signal that neighbor cell receives.

Receive data judging unit 102 and judge the MBMS packet that whether normally receives from input unit 101 outputs.In the time can normally receiving, with the high level that forwards a packet to that receives.In the time can not normally receiving, promptly detect when receiving packet damaged, generation is used for the NACK message of the repeating transmission of these damaged data of requirement, and the NACK message that is generated is sent to eNB 200 by output unit 104, and request received power measuring unit 103 transmits measurement report.

Received power measuring unit 103 uses from the reference signal of input unit 101 outputs, measure the received power of each neighbor cell, based on from the request that receives data judging unit 102, the identifier of neighbor cell and the measurement report that comprises the measurement result of received power are sent to eNB200 by output unit 104.

Figure 16 is the block diagram of structure of the eNB 200 of expression embodiment of the present invention 5.But, give the label identical to the common part of Figure 16 and Fig. 9, and omit its detailed description with Fig. 9.

In Figure 16, input unit 201 will be stored in buffer cell 202 from the MBMS packet that UPE 160 receives.In addition, when NACK that receives the damaged MBMS data of requirement repeating transmission from UE100 and measurement report, measurement report is outputed to cell edge detecting unit 203.When having required the repeating transmission of damaged MBMS packet, the MBMS packet that is stored in the buffer cell 202 is sent to UE 100 once more by output unit 125 by stored counts comparing unit 204.

Cell edge detecting unit 203 is based on the measurement report from input unit 201 input, detects the UE 100 that has transmitted this measurement report and is positioned at edge with which neighbor cell, and the identifier of detected neighbor cell is notified to stored counts comparing unit 204.

204 pairs of stored counts comparing units relatively are positioned at all numbers of users and the pre-set threshold of cell edge from each neighbor cell of cell edge detecting unit 203 notices.Result relatively, if number of users is more than the threshold value, then the identifier with this neighbor cell is notified to multicast processing unit 124, if be lower than threshold value, then input unit 201 is carried out requirement, to retransmit MBMS packet in the MBMS packet that buffer cell 202 stored, corresponding with this NACK.

In addition, in stored counts comparing unit 204, it is identical that the identifier of neighbor cell is notified to the later action of the later action of multicast processing unit 124 and the ST403 of Fig. 8, so omit its explanation.

As mentioned above, according to execution mode 5, when the UE 100 that is positioned at cell edge detects MBMS packet damaged, UE 100 sends as opportunity by requiring the NACK that retransmits these damaged data, send the measurement report of neighbor cell, only just measurement report is sent to NB 200 thus when needed, thereby the amount of battery consumption of UE 100 can be suppressed low.In addition, when near cell edge, having many users,, can realize the raising of user's reception quality of service expeditiously by switching to MCT from SCT.

In addition, the situation that the NACK and the measurement report of damaged MBMS packet are retransmitted in requirement that is used for that sends respectively has been described in the present embodiment, but also NACK and measurement report can have been sent as a message.

(execution mode 6)

In embodiments of the present invention 6, the method that near the number of users the cell edge that is positioned at specific neighbor cell is counted expeditiously is described.

In execution mode 5, each neighbor cell relatively is positioned at all numbers of users and pre-set threshold near the cell edge, if number of users is more than the threshold value, then this neighbor cell request is switched to MCT.Yet, owing to there is the cell edge that is equivalent to the neighbor cell number, so have the ground of omission and send measurement report from being positioned near all cell edges user, till near the number of users the cell edge that is positioned at specific neighbor cell reaches threshold value, need the time, thereby might carry out the not high repeating transmission of efficient repeatedly.So, in the present embodiment, the transmission of measurement report is confined to be positioned near the user the cell edge of specific neighbor cell.

Below, use Figure 15 and Figure 16 that the transfer approach of the measurement report in the present embodiment is described.

In the eNB shown in Figure 16 200, parameter selection unit 132 predefined each regularly between, select the cell identifier of neighbor cell, and selected cell identifier sent to UE 100 by output unit 125.Cell identifier is used to specify UE, and this UE is for being positioned near the cell edge, and detects UE among the damaged UE of MBMS packet, that transmit measurement report.

In UE shown in Figure 15 100, input unit 101 will be notified to received power measuring unit 103 from the cell identifier that eNB 200 receives.Detect the damaged reception data judging unit 102 of MBMS packet, require received power measuring unit 103 to transmit measurement report.

Received power measuring unit 103 is judged the information that whether comprises the corresponding neighbor cell of the cell identifier notified with input unit 101 in the measurement report that is transmitted.When comprising the information of neighbor cell, measurement report is sent to eNB 200, and when not comprising the information of neighbor cell, stops the transmission of measurement report.Threshold determination among the later eNB 200 and to switch to the action of MCT identical with execution mode 5 is so omit its detailed description.

Like this, according to execution mode 6, be arranged near the cell edge and detecting the damaged UE of MBMS packet, only allow near the UE of cell edge that is positioned at specific neighbor cell to transmit measurement report, thereby can count the number of users of the cell edge that is positioned at specific neighbor cell expeditiously, can carry out switching from SCT to MCT rapidly this neighbor cell.

In addition, in the present embodiment, parameter selection unit 132 predefined each select the cell identifier of neighbor cell regularly, but also can only select and pre-estimate identifier continuously into the adjacent sub-district of the relatively poor cell edge of the quality of reception.

In addition, in the present embodiment, in detecting the damaged user of MBMS packet, only allow near the user of cell edge who is positioned at specific neighbor cell to transmit measurement report, but also can be combined in the PF that illustrated in the execution mode 2 and control, in order to avoid send a large amount of measurement reports simultaneously.

In addition, in the above-described embodiment, for example understand to constitute situation of the present invention, but the present invention can realize with software with hardware.

In addition, each functional block that is used for the explanation of above-mentioned each execution mode LSI of typically being used as integrated circuit realizes.These pieces both can be integrated into a chip individually, also it part or all can be integrated into a chip.Though be called LSI herein,, also can be called IC, system LSI, super large LSI (Super LSI) or especially big LSI (Ultra LSI) according to the difference of integrated level.

In addition, the technology of integrated circuit is not limited only to LSI, also can use special circuit or general processor to realize.Also can LSI make the FPGA that the back utilization can programme (Field ProgrammableGate Array: field programmable gate array), the connection of the circuit unit of perhaps reconfigurable LSI inside and the reconfigurable processor of setting.

Moreover, if along with the derivation of semi-conductive technological progress or other technology, the technology of the integrated circuit of alternative LSI has appearred, also can utilize this technology to realize the integrated of functional block certainly.The possibility that suitable biotechnology etc. is also arranged.

The Japanese patent application laid of submitting on August 25th, 2006 is willing to that the disclosed content of specification, accompanying drawing and specification digest that the Japanese patent application laid of submitting in 2006-229811, on October 5th, 2006 is willing to that the Japanese patent application laid of 2006-274080 and submission on November 16th, 2006 is willing among the 2006-310271 to be comprised all quotes in this application.

Industrial applicibility

Core network device of the present invention, radio communication base station device and wireless communications method can not increase Add the battery consumption of UE and improve the utilization ratio of the Radio Resource of whole network, can be applicable to provides The transmission control system of MBMS.

Claims (13)

1, core network device comprises:

Number of users counting unit is unit with the position registration area, and counting is participated in the number of users of multimedia broadcast/group broadcast service (MBMS);

The number of users comparing unit, the described number of users that counts out and the threshold value of regulation are compared, at described number of users is that described threshold value is when above, select many sub-districts to transmit, and at described number of users during less than described threshold value, select single sub-district to transmit, described many sub-districts are transmitted and are, the a plurality of radio communication base station devices that belong to the same frequency zone are the transmitting MBMS forwarding of data synchronously, transmit described single sub-district is to comprise the user's who has participated in described MBMS single radio communication base station device transmitting MBMS forwarding of data in the sub-district; And

Notification unit is transmitted selected many sub-districts or the radio communication base station device that is notified to the subordinate is transmitted in single sub-district.

2, core network device as claimed in claim 1, also comprise: the distribution identifying unit, when described number of users comparing unit has selected single sub-district to transmit,, select forward mode based on the distribution situation of the radio communication base station device of the object of transmitting as single sub-district.

3, core network device as claimed in claim 2, be the threshold value of regulation when above in the ratio of the radio communication base station device number of the object of transmitting as single sub-district and the sum of the radio communication base station device of each position registration area, described distribution identifying unit is selected the forwarding of many sub-districts.

4, radio communication base station device comprises:

Acquiring unit, obtain the indication of many sub-districts forwarding or the indication that transmit single sub-district from core network device, described many sub-districts are transmitted and are, the a plurality of radio communication base station devices that belong to the same frequency zone are repeating multimedia broadcasting/packet service (MBMS) forwarding of data synchronously, transmit described single sub-district is to comprise the user's who has participated in MBMS single radio communication base station device transmitting MBMS forwarding of data in the sub-district;

Counting unit only when having obtained the indication of transmitting single sub-district, is counted in the sub-district that this device is managed; And

Retransmission unit, the result of described counting, transmitting MBMS data in the sub-district that the user exists.

5, radio communication base station device as claimed in claim 4, when having obtained the indication of transmitting single sub-district, described counting unit only shifts control channel the radio communication terminal device in the sub-district of this device management to be enable mode, to be the unit count number of users with the sub-district.

6, radio communication base station device as claimed in claim 4 also comprises:

Detecting unit obtains the quality of reception measurement result of the peripheral cell of being measured by radio communication terminal device, and based on the quality of reception measurement result of being obtained, the radio communication terminal device that exists on the detected cells edge; And

The multicast processing unit during radio communication terminal device that exists on detecting cell edge, carries out MBMS to the neighbor cell that forms described cell edge and participates in request.

7, radio communication base station device as claimed in claim 4 also comprises:

Again count cycle selected cell is selected the i.e. count cycle again of interval till next time count; And

Parameter selection unit is selected the response probability as the condition of the radio communication terminal device transmission response message that requires MBMS,

When having obtained the indication of transmitting single sub-district, described counting unit described selected cell of count cycle again of control and described parameter selection unit, thereby the number of users in the sub-district is the threshold value of regulation when above, prolong again the count cycle and reduce response probability, and the number of users in the sub-district less than the regulation threshold value the time, shorten again the count cycle and improve response probability.

8, radio communication base station device as claimed in claim 4, also comprise: the multicast processing unit, other radio communication base station device inquiry MBMS to the border that is positioned at the position adjacent registration area provides situation, and described other radio communication base station device that MBMS is not provided is carried out MBMS participate in request.

9, radio communication base station device as claimed in claim 4 also comprises:

Detecting unit, when the quality of reception measurement result of the neighbor cell that has obtained the NACK that requires to retransmit damaged MBMS data and measured by radio communication terminal device, based on the quality of reception measurement result of being obtained, the radio communication terminal device that exists on the detected cells edge;

Counting unit, to each neighbor cell counting by the number of users that exists on the detected cell edge of described detecting unit;

The multicast processing unit is the threshold value of regulation when above at the number of users that each neighbor cell is counted out, and this neighbor cell is carried out MBMS participate in request; And

Retransmission unit during less than the threshold value of regulation, is retransmitted the MBMS data that required by described NACK at the number of users that each neighbor cell is counted out.

10, radio communication base station device as claimed in claim 9, the number of users that exists on the cell edge of described counting unit counting and specific neighbor cell.

11, radio communication terminal device comprises:

The data judging unit, it is damaged to judge whether the MBMS data receive have, and has when damaged being judged to be the MBMS data, generates the NACK message that requires to retransmit damaged MBMS data;

The received power measuring unit is measured the received power of each neighbor cell; And

Transmitting element sends to radio communication base station device with the received power measurement result of described NACK message and each neighbor cell.

12, radio communication terminal device as claimed in claim 11, described received power measuring unit is measured the received power of specific neighbor cell.

13, wireless communications method comprises:

Number of users counting step, core network device are unit with the position registration area, and counting is participated in the number of users of multimedia broadcast/group broadcast service (MBMS);

The number of users comparison step, the described number of users that counts out and the threshold value of regulation are compared, at described number of users is that described threshold value is when above, select many sub-districts to transmit, and at described number of users during less than described threshold value, select single sub-district to transmit, described many sub-districts are transmitted and are, the a plurality of radio communication base station devices that belong to the same frequency zone are the transmitting MBMS forwarding of data synchronously, transmit described single sub-district is to comprise the user's who has participated in described MBMS single radio communication base station device transmitting MBMS forwarding of data in the sub-district;

Notifying process is transmitted selected many sub-districts or the radio communication base station device that is notified to described core network device subordinate is transmitted in single sub-district;

Obtaining step, radio communication base station device obtains the indication of described many sub-districts forwarding or the indication that transmit described single sub-district from core network device;

Counting step only when having obtained the indication of transmitting single sub-district, is counted in the sub-district that described radio communication base station device is managed; And

Transmit step, the result of described counting, transmitting MBMS data in the sub-district that the user exists.

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