CN104284438B

CN104284438B - A kind of data transmission method and apparatus and system of cooperative multipoint transmission central dispatching

Info

Publication number: CN104284438B
Application number: CN201310286890.2A
Authority: CN
Inventors: 付喆; 倪浩; 胡海静
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-07-09
Filing date: 2013-07-09
Publication date: 2018-09-11
Anticipated expiration: 2033-07-09
Also published as: CN104284438A; WO2015003612A1

Abstract

The present invention provides a kind of data transmission method and apparatus and system of cooperative multipoint transmission central dispatching, wherein, CCN obtains the CSI of all UE and user face data amount to be transmitted from all cooperation transmission points, according to the CSI of all UE and user face data amount to be transmitted, it is communicated with the cooperation transmission point of CCN scheduling, executes the scheduled transmission of the user face data of CoMP UE；Cooperation transmission point is determined the CoMP resources that CoMP UE data transmissions use, the user face data scheduled transmission of CoMP UE is executed using CoMP resources, the user face data scheduled transmission of non-CoMP UE is executed using non-CoMP resources by being communicated with CCN.User data transmission process problem when the present invention can solve under non-ideal backhaul scene by CCN as scheduling controlling node.

Description

A kind of data transmission method and apparatus and system of cooperative multipoint transmission central dispatching

Technical field

The present invention relates to wireless communication technology field more particularly to a kind of data transmissions of cooperative multipoint transmission central dispatching Method and apparatus and system.

Background technology

CoMP (Coordinated Multiple Points Transmission/Reception, cooperative multipoint transmission) Refer to the multiple TP (transmission point, transfer point) detached on geographical location, collaboration is participated in towards terminal Data transmission (PDSCH (Physical Downlink Shared Channel, physical down link sharing channel) transmission) or Person, which combines, receives data (PUSCH (Physical Uplink Shared Channel, physical uplink chain that a terminal is sent Share channel in road) transmission).

In general, multiple transmission point can be the base station of different community, can also be more in the same control cell A RRH (remote radio head, far end radio frequency).It is passed by the cooperative scheduling between multiple transmission point, precoding, joint It is defeated etc., the interference between cooperation transmission point can be effectively reduced, user, especially cooperation point in the coverage area of collaboration region are improved Cover the handling capacity of edge customer.

Cooperative multipoint transmission technology can be divided into down collaboration multi-point and uplink joint receives.

Down collaboration multi-point is mainly divided into as two kinds of transmission plans：Cooperative scheduling/cooperative beam figuration (coordinated scheduling/coordinated beamforming, CS/CB) and Combined Treatment (joint Processing, JP) scheme.

A transfer point in CS/CB transmission in multiple transmission point sends useful signal, other transfer points to user terminal By combined dispatching and wave beam forming, the interference to the user terminal is minimized.

Combined Treatment scheme can be divided into joint transmission (joint transmission, JT) and the selection of dynamic transmission point (dynamic point selection, DPS).Multiple transmission point sends useful letter to same user terminal simultaneously in JT transmission Number, to enhance the reception signal of user terminal.DPS transmits the transfer point of switching at runtime user terminal, is always passed from cooperation The point optimal to the user terminal is selected to transmit signal in defeated point.

These cooperative multipoint transmission schemes can be combined with each other.It can be combined with dynamic transmission point silence (dynamic Point blanking, DPB) scheme, certain transfer points are dynamically set on certain running time-frequency resources and do not send signal.

Uplink CoMP versus downstreams CoMP is relatively simple, and uplink coordinated mode includes mainly that joint receives and cooperative scheduling two Kind.When joint receives, the signal for the same UE that multiple receiving points receive obtains output signal by Combined Treatment.Cooperation is adjusted When spending, base station side considers multiple receiving point situation scheduling UE in collaboration region, to minimize interference.

It carries out that two ways may be used when cooperative multi-point scheduled transmission between intra-cell transmission node：1) non-central cooperation is adjusted Degree；2) center cooperative scheduling.

The non-central no Centroid of scheduling carries out global optimization scheduling, close to global optimization as a result, can in order to reach The method using iteration scheduling between base station can be needed, may need to carry out multiple scheduling information interaction between cooperative base station, such as Fig. 1 institutes Show.If backhaul time delays are larger between base station, non-central scheduling, which carries out multiple scheduling information interaction, can make scheduling delay excessive, Cause channel information out-of-date, to influence transmission performance.

Then it is the user by each cooperative base station all access base stations being most recently received under the cooperative scheduling scene of center Terminal CSI (Channel State Information, channel state information) information is transferred to a CCN (central Coordination node, center cooperative node), by the user terminal centralized dispatching time domain and frequency that CCN is all cooperative base stations Domain resource, associated base stations are user terminal transmission data further according to the CCN resource scheduling informations sent and pre-encoding results, are such as schemed Shown in 2.

In LTE/LTE-A systems, the information exchange between base station is realized by backhaul link (backhaul).Real network In there may be a variety of backhaul physical connections modes, the information exchange in CoMP cooperative schedulings between base station should consider ideal Backhaul and the case where nonideal backhaul.Usual non-ideal backhaul propagation delay times are likely to be breached 10ms or more Greatly.

Rel-12CoMP technologies are studied using the center cooperative scheduling scheme under non-ideal backhaul link as main CoMP One of scene.In non-ideal backhaul, center cooperative scheduling scheme is primarily present following problem：Backhaul time delays Influence to CoMP central dispatchings.

E-UTRAN (Evolved Universal Terrestrial Radio Access Network, evolution it is general Land wireless network) the network architecture as shown in figure 3, E-UTRAN is made of evolution base station eNB.ENB completes access net function, Pass through idle port communication with UE (User Equipment, user terminal).Not only there is control plane connection between UE and eNB but also existed and used Family face connects.The UE of network is attached to for each, by a MME (Mobility Management Entity, mobility Management entity) for it service is provided, it is connected using S1-MME interface between MME and eNB.S1-MME interface is used to provide control for UE Face service processed, including mobile management and bearer management function.

S-GW (Service Gateway, gateway) is connected between eNB using S1-U interface, for each attachment To the UE of network, service is provided for it there are one S-GW.S1-U interface is used to provide user plane service, the user plane number of UE for UE It is transmitted according to being carried between S-GW and eNB by S1-U.

For center cooperative scheduling scene, the data transmission architecture for considering the scene is needed, and consider for transmission architecture Scheduled transmission problem is subtracted with helping network side timely and accurately to realize to the scheduling decision and data transmission and processing of CoMP user Influence of the small backhaul time delays to CoMP central dispatchings, but do not provide relevant solution also at present.

Invention content

The present invention provides a kind of data transmission method and apparatus and system of cooperative multipoint transmission central dispatching, realizes cooperation The data transmission method of multicast communication center cooperative scheduling helps network side timely and accurately to realize that the scheduling to CoMP UE is determined Plan and data transmission and processing reduce influence of the backhaul time delays to CoMP central dispatchings.

The present invention provides a kind of data transmission system of cooperative multipoint transmission central dispatching, including：

Gateway SGW sends waiting for for the CoMP UE to the serving BS of cooperative multipoint transmission user terminal CoMP UE Transmit user face data；

Center cooperation point CCN belongs to the channel status that the same cooperation transmission point for cooperating set obtains all UE from CCN Information CSI and user face data amount to be transmitted, according to the CSI of all UE and user face data amount to be transmitted, the association with CCN scheduling Make transfer point communication, executes the scheduled transmission of the user face data of CoMP UE；

The cooperation transmission point for belonging to the same set that cooperates with CCN, all UE under the cooperation transmission point are reported to CCN CSI and user face data amount to be transmitted determine the CoMP resources that CoMP UE data transmissions use, utilize by being communicated with CCN CoMP resources execute the user face data scheduled transmission of CoMP UE, and the user plane number of non-CoMP UE is executed using non-CoMP resources According to scheduled transmission, wherein when the cooperation transmission point is the serving BS of non-CoMP UE, obtained from the serving BS of CoMP UE The user face data to be transmitted of CoMP UE.

The present invention also provides the data transmission systems of another cooperative multipoint transmission central dispatching, including：

Gateway SGW, the cooperation transmission point carried out data transmission to scheduling cooperative multipoint transmission user terminal CoMP UE Send the user face data to be transmitted of the CoMP UE；

The cooperation transmission point for belonging to the same set that cooperates with CCN, all UE under the cooperation transmission point are reported to CCN CSI and user face data amount to be transmitted obtain the user face data to be transmitted of CoMP UE from SGW, by being communicated with CCN, determine The CoMP resources that CoMP UE data transmissions use execute the user face data scheduled transmission of CoMP UE, profit using CoMP resources The user face data scheduled transmission of non-CoMP UE is executed with non-CoMP resources.

Above two system gives the data transmission architecture of the data transmission system of cooperative multipoint transmission central dispatching, number It is SGW- cooperation transmission point-CoMP UE according to coplanar transmission structure, in the first possible embodiment, any cooperation transmission point can Directly to obtain user face data from SGW, in second of possible embodiment, for the serving BS of CoMP UE, directly from SGW obtains user face data, for other cooperation transmission points, can obtain user face data from the serving BS of CoMP UE.Control Face data transmission path processed is compared with technology, the serving BS-CoMP UE of as MME-CoMP UE.In above-mentioned data transmission frame Under structure, CCN executes the scheduling controlling function of CoMP UE, to solve under non-ideal backhaul scene by CCN as scheduling controlling User data transmission process problem when node.

The present invention also provides a kind of transmission side datas of the cooperative multipoint transmission central dispatching applied to any of the above-described system Method, including：

Center cooperative node CCN belongs to the channel shape that the same cooperation transmission point for cooperating set obtains all UE from CCN State information CSI and user face data amount to be transmitted；

CSIs and to be transmitted user face data amount of the CCN according to all UE are communicated with the cooperation transmission point of CCN scheduling, are executed The scheduled transmission of the user face data of cooperative multipoint transmission user terminal CoMP UE.

CCN is combined the scheduling controlling function of executing CoMP UE with cooperation transmission point, and the data that can solve CoMP UE pass Defeated problem.

In the first possible realization method in conjunction with the above method, CCN is communicated with the cooperation transmission point that it is dispatched, and is executed The scheduled transmission of the user face data of CoMP UE, including：

The CSI of all UE of CCN and user face data amount to be transmitted, when determining that CoMP UE carry out coordinated multipoint transmission, selection The cooperation transmission point of CoMP UE, and generate the scheduling information of CoMP UE；

The scheduling information of generation is notified the cooperation transmission point of CoMP UE by CCN.In such mode, CCN executes CoMP UE Scheduling controlling, the cooperation transmission point for participating in CoMP UE data transmissions executes the scheduled transmission of CoMP UE according to the instruction of CCN.

Do not include CoMP in the cooperation transmission point of CoMP UE in the first possible realization method in conjunction with the above method When the serving BS of UE, the serving BS for the scheduling information notice CoMP UE that CCN will additionally generate, to support to retransmit data Processing.

In the first possible realization method in conjunction with the above method, for carrying out the CoMP UE of coordinated multipoint transmission, When the serving BS of CoMP UE needs data to retransmit according to the determination of the negative confirmation NACK feedback informations of CoMP UE, according to CCN Scheduling information determine CoMP resources, and retransmitted using current non-CoMP scheduling of resource CoMP UE data, so as to solve Retransmit the processing of data.

In the first possible realization method in conjunction with the above method, the serving BS of CoMP UE utilizes currently non- CoMP scheduling of resource CoMP UE data retransmit, and specifically include：

The serving BS of CoMP UE carries out new data transmission using the serving BS of CCN scheduling CoMP UE to CoMP UE Except at the time of, scheduling CoMP UE data retransmit, and ensure to use different time-domain resource schedule re-transmission datas, to will not send out Raw resource contention.

In the first possible realization method in conjunction with the above method, take appropriate measures in the sides CCN, in order to avoid new data It is clashed with the resource for retransmitting data, the serving BS of CoMP UE utilizes current non-CoMP scheduling of resource CoMP UE data It retransmits, specifically includes：

CCN does not dispatch the service base of CoMP UE at the time of the serving BS scheduling CoMP UE data of CoMP UE retransmit It stands and carries out new data transmission to CoMP UE；Or

Before CCN receives ACK feedbacks of the serving BS of CoMP UE to retransmitting data, the service base of CoMP UE is not dispatched It stands and carries out new data transmission to CoMP UE.

In the first possible realization method in conjunction with the above method, for carrying out the CoMP UE of coordinated multipoint transmission, When the serving BS of CoMP UE needs data to retransmit according to the determination of the negative confirmation NACK feedback informations of CoMP UE, to CoMP UE retransmits data；

If the serving BS of CoMP UE retransmits the synchronization of data to CoMP UE, CCN dispatches the service base of CoMP UE It stands and carries out new data transmission to CoMP UE, then the serving BS of CoMP UE is received new data and retransmitted respectively by two HARQ The ACK/NACK of data is fed back.In this mode, if using identical time-domain resource, in order to distinguish different information feedbacks, Using two HARQ.

In second of possible realization method in conjunction with the above method, CCN is communicated with the cooperation transmission point that it is dispatched, and is executed The scheduled transmission of the user face data of CoMP UE, including：

CSIs and to be transmitted user face data amount of the CCN according to all UE determine that CoMP UE carry out non-coordinated multipoint transmission When, then：

CCN generates the scheduling information of CoMP UE, and the scheduling information of generation is sent to the serving BS of CoMP UE；Or

Non-cooperating transmission mark is sent to the serving BS of CoMP UE by CCN；

CCN does not send the relevant information of any CoMP UE to the serving BS of CoMP UE.

In the first possible realization method in conjunction with the above method, this method is applied to above-mentioned second of system, also wraps It includes：

CCN notifies the cooperation transmission point of selection to SGW when selecting the cooperation transmission point of CoMP UE, so that SGW will The user face data to be transmitted of CoMP UE is sent to the cooperation transmission point of selection.To make SGW carry out route diversion, association is supported Make transfer point and obtains user face data from SGW.

In the first possible realization method in conjunction with the above method, this method is applied to the first above-mentioned system, also wraps It includes：

The scheduling information that the serving BS of CoMP UE is notified according to CCN determines its carried out data transmission with CoMP UE Its cooperation transmission point；

The serving BS of CoMP UE is given birth to according to scheduling information and from the user face data to be transmitted of the SGW CoMP UE received At MAC PDU；

The MAC PDU of generation are sent to and other cooperate with what CoMP UE carried out data transmission by the serving BS of CoMP UE Transfer point.

From the sides CCN, the present invention also provides a kind of numbers of the cooperative multipoint transmission central dispatching applied to any of the above-described system According to transmission method, including：

Cooperation transmission point reports and the channel state information CSI of all UE under the cooperation transmission point and to be transmitted to CCN User face data amount；

Cooperation transmission point obtains CoMP UE's from SGW or from the serving BS of cooperative multipoint transmission user terminal CoMP UE User face data to be transmitted；

Cooperation transmission point is determined the CoMP resources that CoMP UE data transmissions use, is provided using CoMP by being communicated with CCN Source executes the user face data scheduled transmission of CoMP UE, and the user face data that non-CoMP UE are executed using non-CoMP resources is dispatched Transmission.

It, can be from directly from SGW acquisition CoMP UE's if above-mentioned cooperation transmission point is the serving BS of CoMP UE User face data to be transmitted.

In conjunction with the first possible realization method of the above method, cooperation transmission point executes CoMP UE using CoMP resources User face data scheduled transmission, specifically include：

Receive the scheduling information that CCN determines the CoMP UE of transmission when CoMP UE carry out coordinated multipoint transmission；

The CoMP resources that CoMP UE data transmissions use are determined according to scheduling information, according to scheduling information and use to be transmitted Family face data generates media access control protocol data unit MAC PDU；

CoMP resource transmission MAC PDU are utilized on Physical Downlink Shared Channel PDSCH.

In the first possible realization method in conjunction with the above method, CCN dispatches CoMP UE and carries out cooperative multipoint transmission, The cooperation transmission point is the serving BS of CoMP UE, further includes：

When the serving BS of CoMP UE needs data to retransmit according to the determination of the negative confirmation NACK feedback informations of CoMP UE, And it is retransmitted using current non-CoMP scheduling of resource CoMP UE data.

The retransmission process of data is executed by the serving BS of CoMP UE, avoids the data corruption as caused by being handled CCN.

The serving BS of CoMP UE carries out new data transmission using the serving BS of CCN scheduling CoMP UE to CoMP UE Except at the time of, scheduling CoMP UE data retransmit.

In the first possible realization method in conjunction with the above method, further include：If the serving BS of CoMP UE is to CoMP UE retransmits the synchronization of data, determines that the serving BS of CCN scheduling CoMP UE carries out new data transmission, CoMP to CoMP UE The serving BS of UE receives new data by two HARQ and is fed back with the ACK/NACK for retransmitting data respectively.

In second of possible realization method in conjunction with the above method, CCN dispatches CoMP UE and carries out non-cooperating multiple spot biography Defeated, the cooperation transmission point is the serving BS of CoMP, and cooperation transmission point executes the user plane number of CoMP UE using CoMP resources According to scheduled transmission, specifically include：

The scheduling information for receiving the CoMP UE that CCN is sent, determines what CoMP UE data transmissions used according to scheduling information CoMP resources generate MAC PDU according to scheduling information and user face data to be transmitted, CoMP resource transmissions are utilized on PDSCH MAC PDU；Or

When receiving the non-cooperating transmission mark of CCN transmissions or not receiving any relevant information of CoMP UE, CoMP is determined UE carries out non-CoMP transmission, and from the resource except the CoMP resources determined by CCN scheduling informations, it is non-to determine that CoMP UE are carried out The CoMP resources that CoMP transmission uses generate MAC PDU according to determining CoMP resources, determining CoMP are utilized on PDSCH Resource transmission MAC PDU.

In second of possible realization method in conjunction with the above method, CCN dispatches CoMP UE and carries out cooperative multipoint transmission, The cooperation transmission point is the serving BS of CoMP UE, further includes：

Preferably, cooperation transmission point reports the user face data to be transmitted with all UE under the cooperation transmission point to CCN Amount, specifically includes：

Cooperation transmission point is reported and the biography that cooperates by dynamical fashion, semi-static mode or event triggered fashion to CCN The user face data amount to be transmitted of all UE under defeated point.

The present invention also provides a kind of cooperation center's node CCN, including：

Information acquisition unit, for belonging to the channel that the same cooperation transmission point for cooperating set obtains all UE from CCN Status information CSI and user face data amount to be transmitted；

Scheduled transmission unit is used for the CSI according to all UE and user face data amount to be transmitted, with cooperating for CCN scheduling Transfer point communicates, and executes the scheduled transmission of the user face data of cooperative multipoint transmission user terminal CoMP UE.

Preferably, scheduled transmission unit is communicated with the cooperation transmission point that it is dispatched, and executes the user face data of CoMP UE Scheduled transmission, including：

The scheduling information of generation is notified the cooperation transmission point of CoMP UE by CCN.

Preferably, when the cooperation transmission point of CoMP UE does not include the serving BS of CoMP UE, scheduled transmission unit is also By the serving BS of the scheduling information notice CoMP UE of generation.

Preferably, the scheduled transmission unit CoMP UE serving BS scheduling CoMP UE data retransmit at the time of, The serving BS for not dispatching CoMP UE carries out new data transmission to CoMP UE；Or

Before scheduled transmission unit receives ACK feedbacks of the serving BS of CoMP UE to retransmitting data, CoMP is not dispatched The serving BS of UE carries out new data transmission to CoMP UE.

Preferably, scheduled transmission unit is communicated with the cooperation transmission point that it is dispatched, and executes the user face data of CoMP UE Scheduled transmission specifically includes：

According to the CSI of all UE and user face data amount to be transmitted, when determining that CoMP UE carry out non-coordinated multipoint transmission, Then：

The scheduling information of generation, is sent to the serving BS of CoMP UE by the scheduling information for generating CoMP UE；Or

Non-cooperating transmission mark is sent to the serving BS of CoMP UE；

The relevant information of any CoMP UE is not sent to the serving BS of CoMP UE.

Preferably, further include：

Notification unit, for when selecting the cooperation transmission point of CoMP UE, the cooperation transmission point of selection to be notified to SGW, So that the user face data to be transmitted of CoMP UE is sent to the cooperation transmission point of selection by SGW.

The embodiment of the present invention also provides a kind of CCN, including：

Processor is configured as belonging to the channel shape that the same cooperation transmission point for cooperating set obtains all UE from CCN State information CSI and user face data amount to be transmitted；According to the CSI of all UE and user face data amount to be transmitted, with CCN scheduling Cooperation transmission point communicates, and executes the scheduled transmission of the user face data of cooperative multipoint transmission user terminal CoMP UE；

Data transceiver interface, for realizing the data transmit-receive between processor and cooperation transmission point.

The present invention also provides a kind of cooperation transmission points, including：

Reporting unit, for being reported and the channel state information CSI of all UE under the cooperation transmission point and to be passed to CCN Defeated user face data amount；

Data capture unit, for being obtained from SGW or from the serving BS of cooperative multipoint transmission user terminal CoMP UE The user face data to be transmitted of CoMP UE；

Scheduled transmission unit, for by being communicated with CCN, determining the CoMP resources that CoMP UE data transmissions use, utilizing CoMP resources execute the user face data scheduled transmission of CoMP UE, and the user plane number of non-CoMP UE is executed using non-CoMP resources According to scheduled transmission.

Preferably, scheduled transmission unit executes the user face data scheduled transmission of CoMP UE using CoMP resources, specific to wrap It includes：

Preferably, scheduled transmission cell scheduling CoMP UE carry out cooperative multipoint transmission, and the cooperation transmission point is CoMP The serving BS of UE further includes：

Data retransmission unit, when for needing data to retransmit according to the determination of the negative confirmation NACK feedback informations of CoMP UE, And it is retransmitted using current non-CoMP scheduling of resource CoMP UE data.

Preferably, data retransmission unit is retransmitted using current non-CoMP scheduling of resource CoMP UE data, is specifically included：

At the time of progress except new data transmission to CoMP UE using the serving BS of CCN scheduling CoMP UE, scheduling CoMP UE data retransmit.

Preferably, data retransmission unit is additionally operable to determine that the serving BS of CoMP UE retransmits the same of data to CoMP UE Moment is received newly when the serving BS that CCN dispatches CoMP UE carries out new data transmission to CoMP UE by two HARQ respectively Data are fed back with the ACK/NACK for retransmitting data.

Preferably, CCN dispatches CoMP UE and carries out non-cooperating multicast communication, and the cooperation transmission point is the service base of CoMP It stands, scheduled transmission unit executes the user face data scheduled transmission of CoMP UE using CoMP resources, specifically includes：

Preferably, CCN dispatches CoMP UE and carries out cooperative multipoint transmission, and the cooperation transmission point is the service base of CoMP UE It stands, further includes：

Data notification unit, for the scheduling information that notify according to CCN, determine and CoMP UE carry out data transmission its Its cooperation transmission point；MAC PDU are generated according to scheduling information and from the user face data to be transmitted of the SGW CoMP UE received；It will The MAC PDU of generation are sent to the other cooperation transmission points carried out data transmission with CoMP UE.

Preferably, reporting unit reports the user face data amount to be transmitted with all UE under the cooperation transmission point to CCN, It specifically includes：

By dynamical fashion, semi-static mode or event triggered fashion, reports to CCN and own under the cooperation transmission point The user face data amount to be transmitted of UE.

The embodiment of the present invention also provides a kind of cooperation transmission point, including：

Processor is configured as reporting and the channel state information CSI of all UE under the cooperation transmission point and waiting for CCN Transmit user face data amount；For obtaining CoMP from SGW or from the serving BS of cooperative multipoint transmission user terminal CoMP UE The user face data to be transmitted of UE；By being communicated with CCN, determines the CoMP resources that CoMP UE data transmissions use, utilize CoMP Resource executes the user face data scheduled transmission of CoMP UE, and the user face data tune of non-CoMP UE is executed using non-CoMP resources Degree transmission；

Data transceiver interface, for realizing the data transmit-receive between processor and CCN, UE.

The present invention gives one kind between base station under non-ideal backhaul scene, realizes cooperative multipoint transmission center cooperative scheduling Data transmission method, this method enhances existing LTE-A frameworks, can solve under non-ideal backhaul scene by User data transmission process problem when CCN is as scheduling controlling node helps network side timely and accurately to realize and uses CoMP The scheduling decision and data transmission and processing at family reduce influence of the backhaul time delays to CoMP central dispatchings.

Description of the drawings

Fig. 1 is the information exchange schematic diagram of non-central scheduling；

The information exchange schematic diagram dispatched centered on Fig. 2；

Fig. 3 is the E-UTRAN network architectures；

Fig. 4 is the data transmission method flow chart of the sides CCN of embodiment of the present invention cooperative multipoint transmission central dispatching；

Fig. 5 is the data transmission method flow of cooperation transmission point of embodiment of the present invention side cooperative multipoint transmission central dispatching Figure；

Fig. 6 is the data transmission system data transmission architecture of cooperative multipoint transmission central dispatching provided in an embodiment of the present invention Figure；

Fig. 7 is center of embodiment of the present invention cooperative node schematic diagram；

Fig. 8 is cooperation transmission point schematic diagram of the embodiment of the present invention.

Specific implementation mode

With reference to the accompanying drawings and examples to the data transmission method of cooperative multipoint transmission central dispatching provided by the invention It is described in more detail with apparatus and system.

In order to reduce the adjacent area interference of MPS process edge user terminal, the experience of cell boundary user terminal, length are improved Phase evolution enhancing (long term evolution-advance, LTE-A) system uses cooperative multipoint transmission technology (coordinated-multiple-point, CoMP).Cooperative multipoint transmission technology is the multiple biographies detached on geographical location Defeated point (transmission point:TP the cooperation between).And global optimization scheduling is carried out with the presence or absence of Centroid with it The implementation of CoMP technologies is divided into two kinds of non-central cooperative scheduling and center cooperative scheduling.In view of real network situation, LTE-A versions 12 introduce the CoMP scenes of non-ideal backhaul.In the center cooperative scheduling of non-ideal backhaul, by To be realized by center cooperative node CCN in the scheduling controlling function of CoMP UE, and between CCN and eNB, service eNB and other eNB Between there is the backhaul delay problems that can not ignore (typical unidirectional backhaul time delay values are 10ms), it is therefore desirable to examine Consider the scheduling under this scene and realizes and transmit feedback problem of implementation.

The present invention gives one kind between base station under non-ideal backhaul scene, realizes cooperative multipoint transmission center cooperative scheduling Data transmission method, reduce influence of the backhaul time delays to CoMP central dispatchings.

The embodiment of the present invention provides a kind of data transmission system of cooperative multipoint transmission central dispatching, including：

The data transmission architecture of above-mentioned data transmission system provided in an embodiment of the present invention is：The transmission road of user face data Diameter is the serving BS-UE of SGW-CoMP UE, for participating in other cooperation transmission points of CoMP UE, from the service of CoMP UE Base station obtains the user face data to be transmitted of CoMP UE.Existing route may be used in the transmission path of control face data, as Serving BS-the UE of MME-CoMP UE.

User data when above system can solve under non-ideal backhaul scene by CCN as scheduling controlling node passes Defeated process problem helps network side timely and accurately to realize to the scheduling decision and data transmission and processing of CoMP user, reduces Influence of the backhaul time delays to CoMP central dispatchings.

The embodiment of the present invention also provides the data transmission system of another cooperative multipoint transmission central dispatching, including：

The CoMP UE of meaning of the embodiment of the present invention, refer to the UE with CoMP abilities, and CCN determines the dispatching party of CoMP UE Case can dispatch the CoMP UE and carry out cooperative multipoint transmission, can also dispatch the CoMP UE and carry out non-cooperating multicast communication, this Embodiment is known as unicast.The non-CoMP UE of the present embodiment meaning refer to the UE without CoMP abilities, the present embodiment institute The CoMP resources, in particular to CoMP UE of finger transmit the resource used, and whether cooperative multi-point biography is carried out but regardless of the CoMP UE It is defeated.

The data transmission architecture of above-mentioned data transmission system provided in an embodiment of the present invention is：The transmission road of user face data Diameter is SGW- transfer point-UE, i.e., for all cooperation transmission points for participating in CoMP UE, the to be transmitted of CoMP UE is obtained from SGW User face data.Existing route, the as serving BS-UE of MME-CoMP UE may be used in the transmission path of control face data.

Above two system provided in an embodiment of the present invention, at the centers CCN when cooperative scheduling function activation, CCN scheduling Each cooperation transmission point needs the CSI information of UE and data to be transmitted amount being transferred to CCN, is communicated, is held with cooperation transmission point by CCN The scheduling controlling function of row CoMP UE.The cooperation transmission point of CCN scheduling determines that CoMP UE data pass according to the communication with CNN Defeated CoMP resources execute the user face data scheduled transmission of CoMP UE using CoMP resources, and for non-CoMP UE, by assisting Transmission plan is decided in its sole discretion as transfer point and is transmitted.

Therefore, user when above system can solve under non-ideal backhaul scene by CCN as scheduling controlling node Data transmission and processing problem helps network side timely and accurately to realize scheduling decision and data transmission and processing to CoMP user, Reduce influence of the backhaul time delays to CoMP central dispatchings.

The data that the embodiment of the present invention is given below applied to the cooperative multipoint transmission central dispatching of any of the above-described system pass Transmission method, as shown in figure 4, including：

Step 401, cooperative node CCN in center obtains all UE from the cooperation transmission point for belonging to the same set that cooperates with CCN Channel state information CSI and user face data amount to be transmitted；

Step 402, CSIs and to be transmitted user face data amount of the CCN according to all UE, the cooperation transmission point with CCN scheduling Communication executes the scheduled transmission of the user face data of CoMP UE.

CCN is according to the channel state information CSI and data to be transmitted amount of all UE, it may be determined that the dispatching party of CoMP UE Case specially determines that CoMP UE carry out coordinated multipoint transmission and still carry out non-coordinated multipoint transmission and distribute corresponding CoMP moneys Source, such as carries out coordinated multipoint transmission, and the coordinated multipoint transmission scheme specifically used carries out coordinated multipoint transmission for CoMP UE Or when carrying out non-coordinated multipoint transmission, the scheduled transmission for executing the user face data of CoMP UE specifically uses following scheme respectively：

1) CCN determines that CoMP UE carry out coordinated multipoint transmission

LTE MAC protocols support HARQ procedure.According to retransmit whether with it is preceding it is primary transmission have fixed relationship, can be divided into Synchronous (retransmit and carried out in the time pre-defined) and asynchronous HARQ (retransmit any pot life after upper primary transmission Upper progress)；It is according to the MCS (Modulation and coding scheme, modulation coding scheme) and resource location of re-transmission No variable, can be divided into adaptively (can change some or all attributes just passed, such as modulation system, provide when re-transmission Source distribution etc.) and non-adaptive HARQ.

For downlink transfer, LTE downlinks support asynchronous adaptive HARQ to retransmit.For uplink, LTE uplinks are logical Often synchronous non-self-adapting HARQ is supported to retransmit.

Following line asynchronous adaptive HARQ illustrates for retransmitting：

ACK/NACK is to determine to be worth, and re-transmission or the delay of new data and ACK/NACK are indefinite relative to the delay of data, It is determined by scheduler.

ACK/NACK is to determine value k relative to the delay of data, i.e., if downlink subframe #n sends PDSCH, ACK/ NACK feedback positions are in subframe #n+k

Under fdd mode, k=4；

Under tdd mode, k is related with TDD uplink-downlink configurations, and k values are as shown in table 1

Delay under 1 tdd mode of table between ACK/NACK feedbacks and downlink data transmission

In order to support to retransmit the processing of data, it is preferable that do not include the clothes of CoMP UE in the cooperation transmission point of CoMP UE When business base station, the serving BS for the scheduling information notice CoMP UE that CCN will additionally generate.The embodiment of the present invention is for retransmitting data Using following processing mode：

For carry out coordinated multipoint transmission CoMP UE, CoMP UE serving BS according to the negative confirmation of CoMP UE When the determination of NACK feedback informations needs data to retransmit, CoMP resources are determined according to the scheduling information of CCN, and utilize currently non- CoMP scheduling of resource CoMP UE data retransmit.

CoMP resources include time-domain resource and frequency domain resource, it is preferable that the serving BS of CoMP UE utilizes currently non- CoMP scheduling of resource CoMP UE data retransmit, and specifically include：

Utilize the transmission of the transmission and re-transmission data of different time-domain resource scheduling new datas.

In order to which resource contention occurs for the transmission for evading new data and the transmission for retransmitting data, phase can also be executed in the sides CNN The treatment measures answered：

It is further preferred that the serving BS of CoMP UE, the CoMP UE for carrying out coordinated multipoint transmission are according to CoMP When the negative confirmation NACK feedback informations determination of UE needs data to retransmit, data are retransmitted to CoMP UE；If the service of CoMP UE Base station retransmits the synchronization of data to CoMP UE, and the serving BS that CCN dispatches CoMP UE carries out new data biography to CoMP UE Defeated, then the serving BS of CoMP UE receives new data by two HARQ and is fed back with the ACK/NACK for retransmitting data respectively.

2) CCN determines that CoMP UE carry out non-coordinated multipoint transmission

CSIs and to be transmitted user face data amount of the CCN according to all UE determine that CoMP UE carry out non-coordinated multipoint transmission When, it is preferred to use following any processing mode：

Processing mode one, CCN generate the scheduling information of CoMP UE, the scheduling information of generation are sent to the clothes of CoMP UE Business base station；

Non-cooperating transmission mark is sent to the serving BS of CoMP UE by processing mode two, CCN；

Processing mode three, CCN do not send the relevant information of any CoMP UE to the serving BS of CoMP UE.

For processing mode two and processing mode three, by the transmission mode of the serving BS decision CoMP UE of CoMP UE.

Preferably, this method is applied to second of system, further includes：CCN select CoMP UE cooperation transmission point when, The cooperation transmission point of selection is notified to SGW, so that the user face data to be transmitted of CoMP UE is sent to the association of selection by SGW Make transfer point.

Below from the cooperation transmission point side that CCN is dispatched, a kind of cooperative multipoint transmission center applied to above system is provided The data transmission method of scheduling, as shown in figure 5, including：

Step 501, cooperation transmission point reports the channel state information CSI with all UE under the cooperation transmission point to CCN With user face data amount to be transmitted；

Step 502, cooperation transmission point is obtained from SGW or from the serving BS of cooperative multipoint transmission user terminal CoMP UE The user face data to be transmitted of CoMP UE；

Step 503, cooperation transmission point determines the CoMP resources that CoMP UE data transmissions use, profit by being communicated with CCN The user face data scheduled transmission that CoMP UE are executed with CoMP resources, the user plane of non-CoMP UE is executed using non-CoMP resources Data dispatch transmits.

Preferably, cooperation transmission point executes the user face data scheduled transmission of CoMP UE using CoMP resources, specific to wrap It includes：

CCN dispatches CoMP UE and carries out cooperative multipoint transmission, and the cooperation transmission point is the serving BS of CoMP UE, is also wrapped It includes：

Preferably, the serving BS of CoMP UE is retransmitted using current non-CoMP scheduling of resource CoMP UE data, specifically Including：

Preferably, further include：If the serving BS of CoMP UE retransmits the synchronization of data to CoMP UE, CCN is determined The serving BS for dispatching CoMP UE carries out new data transmission to CoMP UE, and the serving BS of CoMP UE passes through two HARQ points Not Jie Shou new data with retransmit data ACK/NACK feed back.

Preferably, CCN dispatches CoMP UE and carries out non-cooperating multicast communication, and the cooperation transmission point is the service base of CoMP It stands, cooperation transmission point executes the user face data scheduled transmission of CoMP UE using CoMP resources, specifically includes：

With reference to embodiment provide cooperative multipoint transmission central dispatching of the present invention data transmission method and system it is excellent Select embodiment.

Embodiment 1

The present embodiment provides the data transmission architecture under a kind of non-ideal backhaul CoMP central dispatching scenes.Such as Fig. 6 Shown, under the framework, the data transfer path between UE and core net is still SGW<->Serving BS<->CoMP UE (i.e. data Direct-connected interface is present between the serving BS of SGW and CoMP UE), CCN only have to CoMP UE (CoMP UE refer to measure Set includes the user terminal of 2 or more base stations) scheduling controlling function.(non-CoMP UE refer to measuring to non-CoMP UE Only include the user terminal of 1 base station in set) scheduling controlling executed by its serving BS.

Specifically, with the same cooperation transmission points (be usually base station) to cooperate in set of CCN by the CSI information of UE, to be passed The information exchanges such as transmission of data amount information, CoMP UE marks select the scheduling resource of CoMP UE according to these information to CCN, CCN, CoMP UE are scheduled, and scheduling information is interacted to the cooperative base station of the CoMP UE.Cooperative base station is according to the scheduling of CCN Instruction carries out CoMP UE the scheduled transmission of new data, and is not supported using non-CoMP resources the scheduling of the terminal of CoMP Transmission.Cooperative base station can obtain new data to be transmitted from SGW or from the serving BS of CoMP UE.

Preferably, CCN nodes can be that OAM is pre-configured, and can also be that each base station in certain area independently selects Determining, the base station or scheduling/stronger base station of data computing capability extensively covered such as each base station selected offer in certain area For CCN nodes.If base station independently selects to determine that CCN, CCN are established with other cooperative base stations and indicated certainly when X2 is connect in certain area Oneself has the function of CCN or centralized dispatching function.

OAM be pre-configured CCN when, CCN can be a base station, can also only be one be deployed in it is near base station, have The independent logical functional entity of relatively degree of emphasizing/data-handling capacity.After OAM selectes CCN, CCN node information notifications are given to the CCN Each base station in management region.If CCN is an independent logical functional entity, CCN is established with the base station for participating in CoMP transmission When connection, base station should be given and indicated accordingly, the instruction indicate oneself be only CCN or be a CoMP functional node or Person is the entity that cannot function as switching target, for avoiding UE being switched to the CCN or cannot achieve load balancing, cell Between the function supported as base station such as interference management, SON.

Preferably, the interface between CCN and cooperative base station can be X2 interface or a kind of new interface, can be activated in CCN When establish interface connection.

The scheduling feature to CoMP UE managed by CCN, can activate in CoMP UE access networks, can also be by The serving BS or CCN of CoMP UE determines whether to activate according to information such as the channel qualities of the positions CoMP UE/measurement, can also The scheduling feature to CoMP UE is activated after the activation of CCN nodes.

Embodiment 2

The preferred embodiment of CCN scheduling CoMP UE cooperative multipoint transmissions and unicast is given below.This programme is applicable in In all CoMP transmission technologies (DPS/DPB, CS/CB, JT), the present embodiment, which is only transmitted with CS/CB, illustrates.

System postulation is as follows：

It is assumed that eNB1, eNB2, eNB3 are the cooperative base station under CCN.(CoMP UE, measuring assembly include 1 He of base station to UE1 Base station 3), the serving BS of UE2 be eNB1, the service of UE3 (CoMP UE, measuring assembly include base station 2 and base station 3), UE4 Base station is eNB2, and the serving BS of UE5 is eNB3.It is non-CoMP UE to be not designated as CoMP UE.

Step 1, all UE pass through to its serving base stations report CSI information and data to be transmitted amount information, each base station CSI information, data to be transmitted amount information are transferred to CCN by backhaul.

UE is to its serving base stations report CSI information (this process is the prior art), specially：Cooperation set (passes through one A CCN carries out the set of the base station composition of centralized dispatching) in each base station receive served user terminals CSI and report, and pass through Backhaul transmits the CSI of each of which served user terminals to CCN.

Base station to the CSI that the CSI of CCN any one served user terminals transmitted may include that the user terminal reports, Can also include the CSI information statistics obtained according to the CSI that the user terminal reports.

Semi-static mode, event triggered fashion or dynamical fashion may be used by the to be transmitted of user terminal in each cooperative base station Data amount information is notified to CCN.

To semi-static reporting schemes, cooperative base station can be according to certain period (such as 20ms) by CoMP UE terminals and non- The data to be transmitted amount information reporting of CoMP user terminal is to CCN.The described data to be transmitted amount information, can be cooperative base station It is expected that the data to be transmitted amount situation within a period of time (semi-static period), can also be actually waiting for of reporting the moment current The data information of transmission.

Triggering reporting schemes or dynamic reporting schemes, cooperative base station to event can simultaneously report in CSI information reportings Data amount information to be transmitted, can also be when user data arrival causes data to be transmitted amount information to change in triggering information Report.

To uplink CoMP, each base station will also report the BSR of UE, PHR information to CCN.

Step 2, the CSI information that CCN is reported according to each base station, user terminal data amount information to be transmitted, determines CoMP The scheduling information of UE, and the scheduling information of CoMP UE is notified to cooperative base station.

It is whole that CCN receives the channel information of each served user terminals of each cooperative base station transmission, user in cooperation set Data amount information to be transmitted etc. is held, all user informations carry out the scheduling of CoMP UE in gathering according to cooperation, and scheduling is believed Breath is notified by backhaul to each cooperative base station of UE.

Specifically scheduling information includes：The scheduled CoMP UE of CCN selections, resource is respectively distributed for scheduled CoMP UE Information (MCS (Modulation and coding scheme, modulation coding scheme), PRB (Physical Resource Block, Physical Resource Block) number, the positions PRB), (be not yet assigned to CoMP UE for the PRB resources group that uses of non-CoMP UE distribution The surplus resources used are, this information need not special notification to cooperative base station.Hereinafter referred to as non-CoMP resources), specifically The precoding limitation of the corresponding message identification of CoMP transmission scheme and cooperative base station, the signal and/or interference shape of CoMP transmission Scheduling informations such as state etc..

No matter CCN dispatches CoMP UE and carries out unicast or cooperative multipoint transmission in the present embodiment, specific scheduling by CCN is executed, and scheduling resource is selected by CCN.

Particularly, (position MCS, PRB, PRB are a for the resource of CCN selects for CoMP UE cooperation transmission point, each CoMP UE Number etc.) when, these resources can in one cycle effectively, can also until reassigning next time continuously effective.

CCN can be that UE switches S1-U according to the strategy of oneself, such as, it is assumed that CCN the last times select serving BS for certain The transfer point of CoMP UE has selected other base stations for the transfer point of the CoMP UE, then CCN again when transfer point selects next time The change of S-GW data transfer paths can also be notified when selecting new cooperation transmission point, so that SGW is by the to be transmitted of CoMP UE Data are sent to the transfer point of CoMP UE.Preferably, if the former transfer point of CoMP UE does not complete data transmission, CCN is also The former cooperation transmission point interaction of notice does not transmit data to new cooperation transmission point.

Assuming that CCN dispatches CS/CB transmission (the specific scheduling letter under eNB1 for UE1 according to CSI, data to be transmitted amount information Breath further includes MCS class 6s, and PRB number is that 3, PRB index are 0~2), base station 3 has carried out jam avoidance；It scheduled for UE3 (specific scheduling information further includes MCS grades 3 to the unicast of eNB2, and PRB number is 5) 1, PRB index are.CCN marks UE1 Know, the scheduling information of UE1 is notified to eNB1, while the disturbance state information of the cooperative base station of jam avoidance (being such as expressed as CS/CB transmission has carried out the mark of the eNB3 of jam avoidance), it notifies to eNB1；CCN is identified, to eNB2 notices UE3 to UE3 Unicast scheduling information；CCN can use pre-coding matrix set to eNB3 notices, be passed to UE1CS/CB under eNB1 for avoiding Defeated interference.

Step 3, cooperative base station receives the scheduling information of CCN notices by backhaul, is obtained from SGW, CoMP UE's waits for Transmission data, and the scheduled transmission of notice progress the CoMP UE and non-CoMP UE according to CCN.

ENB1, eNB2, eNB3 receive the scheduling information of CCN by backhaul respectively, and are adjusted according to scheduling information Degree.

UE marks, the UE scheduling informations that eNB1 is notified according to CCN, determine scheduling user UE1CS/CB transmission and corresponding scheduling Resource information forms MAC PDU packets, generates PDSCH；Determine that eNB3 is jam avoidance according to eNB marks in disturbance state information Base station, the CSI information reported recently according to UE1 calculate the information such as the pre-coding matrix of the transmission；Meanwhile eNB1 generates corresponding number According to NDI information, HARQ process numbers, redundant version number, PDSCH resource impact information etc., generate the CS/CB of PDCCH scheduling UE1 Transmission.In the PRB resources in addition to PRB index are 0~2, the CSI information that eNB1 is reported recently according to UE2 is voluntarily dispatched UE2 carries out non-CoMP transmission.

UE marks, the UE scheduling informations that eNB2 is notified according to CCN, determine scheduling UE3 unicasts and scheduling resource information, Form MAC PDU packets；According to the CSI that UE3 and UE4 are reported recently, the information such as the pre-coding matrix of the transmission are calculated, carry out UE3 Unicast and UE4 non-CoMP transmission.

ENB3 is scheduled according to the CSI that UE5 is reported recently, and without using prelisting except available pre-coding matrix set The non-CoMP transmission of code matrix scheduling UE5.

Step 4, UE ACK/NACK feedbacks and re-transmission.

ACK/NACK information is fed back to respective serving BS by UE, and serving BS needs to retransmit according to A/N feedback determinations When, it is retransmitted using the non-CoMP scheduling of resource CoMP UE data at current time.That is CCN only carries out the initial transmission tune of CoMP UE Degree is carried out the retransfer scheduling of CoMP UE by serving BS.Whether serving BS can also be according to CCN in possible retransmission time The data transmission of the CoMP UE be scheduled to decide whether to carry out the retransfer scheduling of the UE.Alternatively, the transmission of limitation CCN clicks It selects, that is, limits CCN in possible CoMP UE retransmission times, do not dispatch the node except the CoMP UE or dispatch service base station New data transmission is carried out, the ACK of the data transmission is fed back until receiving serving BS.Particularly, if CCN scheduling CoMP UE In the synchronization for carrying out new data transmission, serving BS dispatches the re-transmission of the UE, then requires UE in the same of serving cell There are two HARQ processes for subframe (HARQ processes extend, and increase the HARQ processes number that UE corresponds to a cell).

Assuming that the TDD configurations of each cooperative base station are configuration 1, eNB1 dispatches the CS/CB data of UE1 in 1 subframe 0 of radio frames Initial transmission, the non-CoMP transmission of UE2, eNB2 subframe 0 scheduling can UE3 unicast, the non-CoMP transmission of UE4, eNB3 The scheduling of subframe 0 can the non-CoMP transmissions of UE5, in subframe 7UE feedback A/N to serving BS, and UE1 feeds back NACK to eNB1, UE4 NACK is fed back to eNB2, other UE feeding back ACKs give respective serving BS.Then, eNB1 earliest can in the subframe 1 of radio frames 2, Using the re-transmission (according to non-CoMP UE Schedule retransmissions) of the non-CoMP scheduling of resource UE1 at the moment, eNB2 can be in radio frames 2 Subframe 1, use the re-transmission of the non-CoMP scheduling of resource UE4 at the moment.Further, in order to avoid CCN and eNB1 are in nothing The subframe 1 of line frame 2 dispatches UE1 and carries out new data transmission and re-transmission, and eNB1 can select to carry out new data biography in CCN scheduling UE1 Downlink resources, such as the subframe 4/5/6 of radio frames 2 can be used in other except defeated, carries out the retransfer scheduling of UE1.

Embodiment 3

CCN dispatches CoMP UE cooperative multipoint transmissions, and serving BS dispatches the unicast of CoMP UE.This programme is suitable for All CoMP transmission technologies (DPS/DPB, CS/CB, JT), the present embodiment, which is only transmitted with CS/CB, illustrates.

It is identical in system postulation and embodiment 2, it no longer repeats here.

Step 1, all user terminals report CSI information, each base station by backhaul CSI information, user terminal Data to be transmitted amount information is transferred to CCN.Specific implementation process is the same as 2 step 1 of embodiment.

Step 2, the CSI information that CCN is reported according to cooperative base station, user terminal data amount information to be transmitted are determined and are adjusted Information is spent, and scheduling information is notified to cooperative base station.

Specific method is only that with 2 step 2 of embodiment, difference：When CCN dispatches CoMP UE unicasts, CCN is only logical Know that the serving BS of the CoMP UE carries out unicast to the UE, or does not notify any scheduling information of CoMP UE, by The serving BS of CoMP UE selects the tune of the CoMP UE from the resource except the CoMP resources determined by CCN scheduling informations Resource is spent, unicast scheduling is carried out.

Assuming that CCN dispatches CS/CB transmission (the specific scheduling letter under eNB1 for UE1 according to CSI, data to be transmitted amount information Breath further includes MCS class 6s, and PRB number is that 3, PRB index are 0~2), eNB3 has carried out jam avoidance；It scheduled for UE3 The unicast of eNB2.UE1 identifies, notifies the scheduling information of UE1 to eNB1 by CCN, while by the cooperation base of jam avoidance The disturbance state information (being such as expressed as the mark that CS/CB transmission has carried out the eNB3 of jam avoidance) stood, notifies to eNB1； CCN carries out unicast scheduling (or CCN does not notify any scheduling information of UE3) to eNB2 notice UE3 marks, notice to UE3； CCN can use pre-coding matrix set to eNB3 notices, for avoiding the interference transmitted to UE1CS/CB under eNB1.

Step 3, cooperative base station receives the scheduling information of CCN notices by backhaul, and is carried out according to the notice of CCN The scheduled transmission of CoMP UE and non-CoMP UE.

Specific method no longer repeats here with the step 3 of embodiment 2.Difference is only that：The serving BS of CoMP UE is received The unicast of the CoMP UE is indicated to CCN notices, or does not receive the scheduling information of any CoMP UE of CCN notices When, unicast scheduling is carried out to the CoMP UE by serving BS.

Assuming that UE marks, UE scheduling informations that eNB1 is notified according to CCN, scheduling user UE1CS/CB transmission and corresponding is determined Scheduling resource information forms MAC PDU packets, generates PDSCH；Determine that eNB3 is interference according to eNB marks in disturbance state information Avoid base station, the CSI information reported recently according to UE1 calculates the information such as the pre-coding matrix of the transmission；Meanwhile eNB1 generations pair The NDI information of data, HARQ process numbers, redundant version number, PDSCH resource impact information etc. are answered, generates PDCCH scheduling UE1's CS/CB is transmitted.In the PRB resources in addition to PRB index are 0~2, the CSI information that eNB1 is reported recently according to UE2, from Row scheduling UE2 carries out non-CoMP transmission.UE3 marks, the UE3 unicasts that eNB2 is notified according to CCN are indicated, or are not received The scheduling information of any UE3 of CCN notices, using information such as UE3 and the UE4 calculated pre-coding matrixes of CSI reported recently, Carry out the unicast of UE3 and the non-CoMP transmission scheduling of UE4.ENB3 is scheduled according to the CSI that UE5 is reported recently, and not Use the non-CoMP transmission that UE5 can be dispatched with the pre-coding matrix except pre-coding matrix set.

Step 4, UE A/N feedbacks and re-transmission.Specific method no longer repeats here with 2 step 4 of embodiment.

Embodiment 4

CCN dispatches CoMP UE cooperative multipoint transmissions and unicast.This programme is suitable for all CoMP transmission technologies (DPS/DPB, CS/CB, JT), the present embodiment, which is only transmitted with DPS/DPB, illustrates.

It is identical in system postulation and embodiment 2.

Step 1, with 2 step 1 of embodiment.

Step 2, specific method is similar to the step 2 of embodiment 2.

Difference is exemplified below：Assuming that CCN, according to CSI, data to be transmitted amount information, eNB1 is in PRB index 1~3 for scheduling Upper silence, scheduled the unicast of eNB2 for UE3, (specific scheduling information further includes MCS grades 3, and PRB number is 1, PRB Index is that 5), scheduled DPS/DPB transmission of the UE1 on eNB3, (specific scheduling information further includes MCS class 6s, and PRB number is 3, PRB index are 1~3).CCN notifies aforementioned scheduling information respectively to each cooperative base station by backhaul.In addition, by It needs to transmit on the serving cell in the PDCCH information of CoMP UE, CCN is in addition to will notify the scheduling information of CoMP UE to association Make base station, it is also necessary to will be identified for the selected DCI information of UE1DPS/DPB transmission, cooperation cell information (eNB3 marks etc.), UE1 It notifies to eNB1.After eNB1 receives scheduling information, according to the scheduling information group packet MAC PDU that CCN is sent, and it is sent to cooperation base It stands.

Step 3, specific method is similar to 2 step 3 of embodiment.

ENB1, eNB2, eNB3 are scheduled according to CCN notices.The scheduling information that eNB1 is notified according to CCN determines that UE1 is marked Knowledge DCI information, is selected the cooperation cell mark eNB3 transmitted for DPS/DPB, group packet MAC PDU, and UE is identified, MAC PDU notifies that (eNB1 can retain always the MAC PDU of generation, until the corresponding A CK that eNB1 receives UE1 transmissions is anti-to eNB3 Feedback)；ENB1 generates corresponding new data instruction NDI information, HARQ process numbers, redundant version number, PDSCH resource impact information, Generate the PDCCH that corresponding UE 1 is transmitted；ENB1 according on silencing information domain mark (eNB1 mark, UE mark, PRB identify) no Scheduled transmission is carried out on the silent resource of CCN instructions.ENB2 is notified according to CCN, according to the newest CSI reported of UE3, UE4, is adjusted Spend the data transmission of the unicast and UE4 of UE3.The scheduling information that eNB3 is notified according to CCN determines that UE1 is that target user is whole End, since UE1 is not this base station served user terminals, and CCN does not have notification signal status information (being transmitted for JT), and determining should The transfer point of transmission is only this base station, and reading interference information is the mark of eNB1, confirms that eNB1 is silent in corresponding PRB resources； ENB3 determines corresponding this base station transmission, the precoding of eNB1 silences according to the newest CSI information (eNB1 interactions are known) reported of UE1 The information such as matrix, and the MAC PDU information interacted according to the MCS information of CCN notices, PRB information, the positions PRB, eNB1, generate The PDSCH that corresponding UE 1 is transmitted (after PDSCH is sent, eNB3 can not retain corresponding MAC PDU).ENB1 and eNB3 needs to protect The PDCCH and PDSCH of card corresponding UE 1DPS/DPB transmission are issued in same subframe, and predefined moment mode, which such as may be used, to be ensured Eating dishes without rice or wine to send simultaneously (when CCN notifies scheduling information, notifies eNB1 and eNB3 to issue PDCCH and PDSCH, n CCN at the n+k moment Information delivery time；After eNB2 receives CCN scheduling informations notice, PDCCH is issued after the reserved k times, k is the non-clothes being expected The group packet time for base station eNB 3 of being engaged in).

Step 4, UE A/N feedbacks and re-transmission.With the step 4 of embodiment 2, no longer repeat here.

Embodiment 5

CCN dispatches CoMP UE cooperative multipoint transmissions and unicast.This programme is suitable for all CoMP transmission technologies (DPS/DPB, CS/CB, JT), the present embodiment, which is only transmitted with JT, illustrates.

It is identical in system postulation and embodiment 2.

Step 1, with 2 step 1 of embodiment.

Step 2, specific method is similar to 2 step 2 of embodiment.

Difference is exemplified below：Assuming that CCN is according to CSI, data to be transmitted amount information, JTs of the scheduling UE1 in eNB1 and eNB3 It transmits (specific scheduling information further includes MCS class 6s, and PRB number is that 3, PRB index are 1~3), lists of the scheduling UE3 in eNB2 (specific scheduling information further includes MCS grades 3, and PRB number is 5) 1, PRB index are for point transmission.

Step 3, specific method is similar to 2 step 3 of embodiment.

ENB1, eNB2, eNB3 are scheduled according to CCN notices.ENB1 receives the scheduling information of CCN notices, according to signal ENB marks (eNB1 marks, eNB3 marks), the UE marks indicated on status information domain, determines that eNB1 and eNB3 carry out JT to UE1 Transmission；According to eNB1, eNB3 mark indicated on DCI information, signal status information domain, group wraps MAC PDU, newest according to UE1 The CSI reported generates the information such as the PMI of JT scheduling instances；To eNB3, (eNB1 can be with one by the interaction of MAC PDU, UE1 mark by eNB1 It is straight to retain the MAC PDU generated, until eNB1 receives the corresponding A CK feedbacks of UE1 transmissions)；ENB1 generates corresponding new data and refers to Show NDI information, HARQ process numbers, redundant version number, PDSCH resource impact information.ENB2 is notified according to CCN, according to UE3, U4 The newest CSI reported, dispatches the unicast of UE3 and the data transmission of UE4.ENB3 receives the scheduling information of CCN notices, according to Signal status information domain indicate, determine eNB1 and eNB3 scheduling UE1 JT transmission, according to CCN notify MCS, PRB information, The information such as the PMI of JT transmission that the newest CSI information reported of MAC PDU, UE1 of eNB1 interactions calculates, dispatch the PDSCH of UE1 Transmission.ENB1 and eNB3 is necessary to ensure that the PDCCH and PDSCH of corresponding UE 1JT transmission are issued in the same subframe.

Above-described embodiment proposes the data transmission architecture under a kind of non-ideal backhaul CoMP central dispatching scenes.It should Under framework, the data transfer path between CoMP UE and core net is still S-GW<->Serving BS<->(i.e. data-direct connection connects UE Mouth is present between S-GW and the serving BS of user), CCN only has the scheduling controlling function to CoMP UE.

The above embodiment of the present invention gives under one kind backhaul scene non-ideal between base station, realizes in cooperative multipoint transmission The data transmission method of heart cooperative scheduling, this method can solve under non-ideal backhaul scene by CCN as scheduling controlling section User data transmission process problem when point helps network side timely and accurately to realize scheduling decision and data to CoMP user Transmission process reduces influence of the backhaul time delays to CoMP central dispatchings.

A kind of data biography of cooperative multipoint transmission central dispatching is also provided based on same inventive concept, in the embodiment of the present invention Defeated device, since the principle that the device solves the problems, such as is similar to a kind of data transmission method of cooperative multipoint transmission central dispatching, Therefore the implementation of the device may refer to the implementation of method, and overlaps will not be repeated.

Node CCN in cooperation center's provided in an embodiment of the present invention, as shown in fig. 7, comprises：

Information acquisition unit 701, for belonging to the letter that the same cooperation transmission point for cooperating set obtains all UE from CCN Channel state information CSI and user face data amount to be transmitted；

Scheduled transmission unit 702 is used for the CSI according to all UE and user face data amount to be transmitted, the association with CCN scheduling Make transfer point communication, executes the scheduled transmission of the user face data of cooperative multipoint transmission user terminal CoMP UE.

The center cooperative node includes processor and data transceiver interface on hardware, when specific implementation, the processing Device is configured as：It obtains the channel state information CSI of all UE from the same cooperation transmission point for cooperating set is belonged to CCN and waits for Transmit user face data amount；It is logical with the cooperation transmission point of CCN scheduling according to the CSI of all UE and user face data amount to be transmitted Letter executes the scheduled transmission of the user face data of cooperative multipoint transmission user terminal CoMP UE；The data transceiver interface is used Data transmit-receive between realization processor and cooperation transmission point.

When specific implementation, it can be realized by processor by above-mentioned functional configuration in processor.

When specific implementation, processor is configured with above-mentioned function.

Non-cooperating transmission mark is sent to the serving BS of CoMP UE；

Preferably, further include：Notification unit, for when selecting the cooperation transmission point of CoMP UE, the cooperation of selection to be passed Defeated point notice is to SGW, so that the user face data to be transmitted of CoMP UE is sent to the cooperation transmission point of selection by SGW.

When specific implementation, on a processor by above-mentioned functional configuration, realized by processor.

The embodiment of the present invention also provides a kind of cooperation transmission point, as shown in figure 8, including：

Reporting unit 801, for CCN report with the channel state information CSI of all UE under the cooperation transmission point and User face data amount to be transmitted；

Data capture unit 802, for being obtained from SGW or from the serving BS of cooperative multipoint transmission user terminal CoMP UE Take the user face data to be transmitted of CoMP UE；

Scheduled transmission unit 803, for by being communicated with CCN, determining the CoMP resources that CoMP UE data transmissions use, The user face data scheduled transmission that CoMP UE are executed using CoMP resources, the user of non-CoMP UE is executed using non-CoMP resources Face data scheduled transmission.

The cooperation transmission point includes processor and data transceiver interface on hardware, when specific implementation, the processor It is configured as：It is reported and the channel state information CSI of all UE and user face data to be transmitted under the cooperation transmission point to CCN Amount；User to be transmitted for obtaining CoMP UE from SGW or from the serving BS of cooperative multipoint transmission user terminal CoMP UE Face data；By being communicated with CCN, determines the CoMP resources that CoMP UE data transmissions use, CoMP is executed using CoMP resources The user face data scheduled transmission of UE executes the user face data scheduled transmission of non-CoMP UE using non-CoMP resources；

Above-mentioned cooperation transmission point may include base station, relay node (Relay), and base station therein includes macro base station (Macro), micro-base station (Micro), femto base station (Pico), Home eNodeB or for femto base station (Femto) etc., Yi Jiqi Its possible wireless access point (AP) using tdd mode.

The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.

These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of data transmission system of cooperative multipoint transmission central dispatching, which is characterized in that including：

Gateway SGW sends the to be transmitted of the CoMP UE to the serving BS of cooperative multipoint transmission user terminal CoMP UE User face data；

Center cooperation point CCN belongs to the channel state information that the same cooperation transmission point for cooperating set obtains all UE from CCN CSI and user face data amount to be transmitted, according to the CSI of all UE and user face data amount to be transmitted, with the biography that cooperates of CCN scheduling Defeated point communication, executes the scheduled transmission of the user face data of CoMP UE；

The cooperation transmission point for belonging to the same set that cooperates with CCN, to CCN report under the cooperation transmission point CSI of all UE and User face data amount to be transmitted is determined the CoMP resources that CoMP UE data transmissions use, is provided using CoMP by being communicated with CCN Source executes the user face data scheduled transmission of CoMP UE, and the user face data that non-CoMP UE are executed using non-CoMP resources is dispatched Transmission, wherein when the cooperation transmission point is the serving BS of non-CoMP UE, CoMP is obtained from the serving BS of CoMP UE The user face data to be transmitted of UE.

2. a kind of data transmission system of cooperative multipoint transmission central dispatching, which is characterized in that including：

Gateway SGW, the cooperation transmission point carried out data transmission to scheduling cooperative multipoint transmission user terminal CoMP UE are sent The user face data to be transmitted of the CoMP UE；

The cooperation transmission point for belonging to the same set that cooperates with CCN, to CCN report under the cooperation transmission point CSI of all UE and User face data amount to be transmitted, the user face data to be transmitted that CoMP UE are obtained from SGW determine CoMP by being communicated with CCN The CoMP resources that UE data transmissions use, the user face data scheduled transmission of CoMP UE is executed using CoMP resources, and utilization is non- CoMP resources execute the user face data scheduled transmission of non-CoMP UE.

3. a kind of data transmission method of cooperative multipoint transmission central dispatching applied to system described in claims 1 or 2, special Sign is, including：

Center cooperative node CCN belongs to the channel status letter that the same cooperation transmission point for cooperating set obtains all UE from CCN Cease CSI and user face data amount to be transmitted；

According to the CSI of all UE and user face data amount to be transmitted, is communicated with the cooperation transmission point of CCN scheduling, it is more to execute cooperation The scheduled transmission of the user face data of point transmission user terminal CoMP UE.

4. method as claimed in claim 3, which is characterized in that CCN is communicated with the cooperation transmission point that it is dispatched, and executes CoMP The scheduled transmission of the user face data of UE, including：

The CSI of all UE of CCN and user face data amount to be transmitted when determining that CoMP UE carry out coordinated multipoint transmission, select CoMP The cooperation transmission point of UE, and generate the scheduling information of CoMP UE；

5. method as claimed in claim 4, which is characterized in that

When the cooperation transmission point of CoMP UE does not include the serving BS of CoMP UE, the scheduling information that CCN will additionally generate notifies The serving BS of CoMP UE.

6. method as claimed in claim 5, which is characterized in that

For carry out coordinated multipoint transmission CoMP UE, CoMP UE serving BS according to the negative confirmation NACK of CoMP UE When feedback information determination needs data to retransmit, CoMP resources are determined according to the scheduling information of CCN, and provide using current non-CoMP It dispatches CoMP UE data and retransmits in source.

7. method as claimed in claim 6, which is characterized in that the serving BS of CoMP UE utilizes current non-CoMP resources It dispatches CoMP UE data to retransmit, specifically include：

The serving BS of CoMP UE is carried out to CoMP UE except new data transmission using the serving BS of CCN scheduling CoMP UE At the time of, scheduling CoMP UE data retransmit.

8. method as claimed in claim 6, which is characterized in that the serving BS of CoMP UE utilizes current non-CoMP resources It dispatches CoMP UE data to retransmit, specifically include：

CCN at the time of the serving BS scheduling CoMP UE data of CoMP UE retransmit, do not dispatch the serving BS of CoMP UE to CoMP UE carry out new data transmission；Or

Before CCN receives the ACK feedbacks of the serving BS of CoMP UE to retransmitting data, do not dispatch the serving BS of CoMP UE to CoMP UE carry out new data transmission.

9. method as claimed in claim 5, which is characterized in that for carrying out CoMP UE, the CoMP UE of coordinated multipoint transmission Serving BS when needing data to retransmit according to the determination of the negative confirmation NACK feedback informations of CoMP UE, retransmit number to CoMP UE According to；

If the serving BS of CoMP UE retransmits the synchronization of data to CoMP UE, CCN dispatch the serving BS of CoMP UE to CoMP UE carry out new data transmission, then the serving BS of CoMP UE receives new data by two HARQ and retransmits data respectively ACK/NACK feedback.

10. method as claimed in claim 3, which is characterized in that CCN is communicated with the cooperation transmission point that it is dispatched, and executes CoMP The scheduled transmission of the user face data of UE, including：

CSIs and to be transmitted user face data amount of the CCN according to all UE, when determining that CoMP UE carry out non-coordinated multipoint transmission, Then：

CCN generates the scheduling information of CoMP UE, and the scheduling information of generation is sent to the serving BS of CoMP UE；Alternatively,

Non-cooperating transmission mark is sent to the serving BS of CoMP UE by CCN；Alternatively,

11. method as described in claim 4 or 5, which is characterized in that this method is applied to the system described in claim 2, also Including：

CCN notifies the cooperation transmission point of selection to SGW when selecting the cooperation transmission point of CoMP UE, so that SGW is by CoMP The user face data to be transmitted of UE is sent to the cooperation transmission point of selection.

12. method as described in claim 4 or 5, which is characterized in that this method is applied to system described in claim 1, also Including：

The scheduling information that the serving BS of CoMP UE is notified according to CCN determines the other associations carried out data transmission with CoMP UE Make transfer point；

The serving BS of CoMP UE is generated according to scheduling information and from the user face data to be transmitted of the SGW CoMP UE received MAC PDU；

The MAC PDU of generation are sent to the other cooperation transmissions carried out data transmission with CoMP UE by the serving BS of CoMP UE Point.

13. a kind of data transmission method of cooperative multipoint transmission central dispatching applied to system described in claims 1 or 2, It is characterized in that, including：

Cooperation transmission point reports and the channel state information CSI of all UE and user to be transmitted under the cooperation transmission point to CCN Face data amount；

Cooperation transmission point obtains the to be passed of CoMP UE from SGW or from the serving BS of cooperative multipoint transmission user terminal CoMP UE Defeated user face data；

Cooperation transmission point is determined the CoMP resources that CoMP UE data transmissions use, is held using CoMP resources by being communicated with CCN The user face data scheduled transmission of row CoMP UE, the user face data that non-CoMP UE are executed using non-CoMP resources dispatch biography It is defeated.

14. method as claimed in claim 13, which is characterized in that cooperation transmission point executes CoMP UE's using CoMP resources User face data scheduled transmission, specifically includes：

The CoMP resources that CoMP UE data transmissions use are determined according to scheduling information, according to scheduling information and user plane to be transmitted Data generate media access control protocol data unit MAC PDU；

15. method as claimed in claim 13, which is characterized in that CCN dispatches CoMP UE and carries out cooperative multipoint transmission, described Cooperation transmission point is the serving BS of CoMP UE, further includes：

When the serving BS of CoMP UE needs data to retransmit according to the determination of the negative confirmation NACK feedback informations of CoMP UE, and profit It is retransmitted with current non-CoMP scheduling of resource CoMP UE data.

16. method as claimed in claim 15, which is characterized in that the serving BS of CoMP UE is provided using current non-CoMP Source is dispatched CoMP UE data and is retransmitted, and specifically includes：

17. method as claimed in claim 15, which is characterized in that further include：

If the serving BS of CoMP UE retransmits the synchronization of data to CoMP UE, the service base of CCN scheduling CoMP UE is determined It stands and carries out new data transmission to CoMP UE, the serving BS of CoMP UE receives new data by two HARQ and retransmits number respectively According to ACK/NACK feedback.

18. method as claimed in claim 13, which is characterized in that CCN dispatches CoMP UE and carries out non-cooperating multicast communication, institute The serving BS that cooperation transmission point is CoMP is stated, cooperation transmission point executes the user face data tune of CoMP UE using CoMP resources Degree transmission, specifically includes：

The scheduling information for receiving the CoMP UE that CCN is sent, the CoMP that CoMP UE data transmissions use is determined according to scheduling information Resource generates MAC PDU according to scheduling information and user face data to be transmitted, CoMP resource transmissions MAC is utilized on PDSCH PDU；Or

When receiving the non-cooperating transmission mark of CCN transmissions or not receiving any relevant information of CoMP UE, CoMP UE are determined Non- CoMP transmission is carried out, from the resource except the CoMP resources determined by CCN scheduling informations, it is non-to determine that CoMP UE are carried out The CoMP resources that CoMP transmission uses generate MAC PDU according to determining CoMP resources, determining CoMP are utilized on PDSCH Resource transmission MAC PDU.

19. method as claimed in claim 13, which is characterized in that CCN dispatches CoMP UE and carries out cooperative multipoint transmission, described Cooperation transmission point is the serving BS of CoMP UE, further includes：

20. method as claimed in claim 13, which is characterized in that cooperation transmission point reports and the cooperation transmission point to CCN Under all UE user face data amount to be transmitted, specifically include：

Cooperation transmission point is reported and the cooperation transmission point by dynamical fashion, semi-static mode or event triggered fashion to CCN Under all UE user face data amount to be transmitted.

21. a kind of cooperation center's node CCN, which is characterized in that including：

Information acquisition unit, for belonging to the channel status that the same cooperation transmission point for cooperating set obtains all UE from CCN Information CSI and user face data amount to be transmitted；

Scheduled transmission unit is used for the CSI according to all UE and user face data amount to be transmitted, the cooperation transmission with CCN scheduling Point communication, executes the scheduled transmission of the user face data of cooperative multipoint transmission user terminal CoMP UE.

22. CCN as claimed in claim 21, which is characterized in that scheduled transmission unit is communicated with the cooperation transmission point that it is dispatched, The scheduled transmission of the user face data of CoMP UE is executed, including：

23. CCN as claimed in claim 22, which is characterized in that in the cooperation transmission point of CoMP UE do not include CoMP UE When serving BS, the serving BS for the scheduling information notice CoMP UE that scheduled transmission unit will additionally generate.

24. CCN as claimed in claim 23, which is characterized in that serving BS tune of the scheduled transmission unit in CoMP UE At the time of spending the re-transmission of CoMP UE data, the serving BS for not dispatching CoMP UE carries out new data transmission to CoMP UE；Or

Before scheduled transmission unit receives ACK feedbacks of the serving BS of CoMP UE to retransmitting data, do not dispatch CoMP UE's Serving BS carries out new data transmission to CoMP UE.

25. CCN as claimed in claim 21, which is characterized in that scheduled transmission unit is communicated with the cooperation transmission point that it is dispatched, The scheduled transmission for executing the user face data of CoMP UE, specifically includes：

The scheduling information of generation, is sent to the serving BS of CoMP UE by the scheduling information for generating CoMP UE；Alternatively,

Non-cooperating transmission mark is sent to the serving BS of CoMP UE；Alternatively,

26. the CCN as described in claim 22 or 23, which is characterized in that further include：

27. a kind of cooperation transmission point, which is characterized in that including：

Reporting unit, for being reported and the channel state information CSI of all UE and use to be transmitted under the cooperation transmission point to CCN Family face data amount；

Data capture unit, for obtaining CoMP from SGW or from the serving BS of cooperative multipoint transmission user terminal CoMP UE The user face data to be transmitted of UE；

Scheduled transmission unit, for by being communicated with CCN, determining the CoMP resources that CoMP UE data transmissions use, utilizing CoMP Resource executes the user face data scheduled transmission of CoMP UE, and the user face data tune of non-CoMP UE is executed using non-CoMP resources Degree transmission.

28. cooperation transmission point as claimed in claim 27, which is characterized in that scheduled transmission unit is executed using CoMP resources The user face data scheduled transmission of CoMP UE, specifically includes：

29. cooperation transmission point as claimed in claim 27, which is characterized in that scheduled transmission cell scheduling CoMP UE are assisted Make multicast communication, the cooperation transmission point is the serving BS of CoMP UE, further includes：

Data retransmission unit, when for needing data to retransmit according to the determination of the negative confirmation NACK feedback informations of CoMP UE, and profit It is retransmitted with current non-CoMP scheduling of resource CoMP UE data.

30. cooperation transmission point as claimed in claim 29, which is characterized in that data retransmission unit is provided using current non-CoMP Source is dispatched CoMP UE data and is retransmitted, and specifically includes：

At the time of progress except new data transmission to CoMP UE using the serving BS of CCN scheduling CoMP UE, CoMP UE are dispatched Data retransmit.

31. cooperation transmission point as claimed in claim 29, which is characterized in that data retransmission unit is additionally operable to determine CoMP UE Serving BS retransmit the synchronizations of data to CoMP UE, CCN dispatch CoMP UE serving BS carried out to CoMP UE it is new When data transmission, new data is received respectively by two HARQ and is fed back with the ACK/NACK for retransmitting data.

32. cooperation transmission point as claimed in claim 27, which is characterized in that CCN dispatches CoMP UE and carries out non-cooperating multiple spot biography Defeated, the cooperation transmission point is the serving BS of CoMP, and scheduled transmission unit executes the user plane of CoMP UE using CoMP resources Data dispatch transmits, and specifically includes：

33. cooperation transmission point as claimed in claim 27, which is characterized in that CCN dispatches CoMP UE and carries out cooperative multi-point biography Defeated, the cooperation transmission point is the serving BS of CoMP UE, further includes：

Data notification unit, the scheduling information for being notified according to CCN determine the other associations carried out data transmission with CoMP UE Make transfer point；MAC PDU are generated according to scheduling information and from the user face data to be transmitted of the SGW CoMP UE received；It will generate MAC PDU be sent to the other cooperation transmission points carried out data transmission with CoMP UE.

34. cooperation transmission point as claimed in claim 27, which is characterized in that reporting unit reports and the biography that cooperates to CCN The user face data amount to be transmitted of all UE, specifically includes under defeated point：

By dynamical fashion, semi-static mode or event triggered fashion, reported and all UE under the cooperation transmission point to CCN User face data amount to be transmitted.