CN104301953A

CN104301953A - Method and device for coordinating multi-point transmission control during cell switching

Info

Publication number: CN104301953A
Application number: CN201310298434.XA
Authority: CN
Inventors: 付喆; 胡海静
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT
Priority date: 2013-07-16
Filing date: 2013-07-16
Publication date: 2015-01-21
Also published as: WO2015007209A1

Abstract

The present application discloses a method and device for coordinating multi-point transmission control during cell switching, the method comprising: when determining to conduct cell switching on a terminal, a service base station deactivates coordinating multi-point transmission to the terminal, and transmits a message instructing other access network nodes involved in coordinating multi-point transmission with the terminal to deactivate coordinating multi-point transmission, the message directing deactivation of coordinating multi-point transmission carrying the identifier information of the terminal, as well as the direction to deactivate the coordinating multi-point transmission; after the other access network nodes receive the message directing deactivation of coordinating multi-point transmission transmitted by the service base station, identifying the terminal according to the identifier information thereof, and deactivating the coordinating multi-point transmission to the terminal according to the direction to deactivate coordinating multi-point transmission. An embodiment of the present invention does not need to ensure the continuity of coordinating multi-point transmission to a terminal, and solves the problem of how to deal with coordinating multi-point transmission to the terminal during cell switching of the terminal performing the coordinating multi-point transmission.

Description

Cooperative multipoint transmission control method in a kind of cell switch process and device

Technical field

The present invention relates to wireless communication technology field, particularly relate to the cooperative multipoint transmission control method in a kind of cell switch process and device.

Background technology

In Long Term Evolution (Long Term Evolution, LTE) system, the process that UE carries out cell merge is as follows:

The measurement result that source evolved base station (eNB) reports according to subscriber equipment (User Equipment, UE), makes as UE carries out the judgement of X2 switching.

Source eNB sends handover request message to target eNB.

Target eNB is after receiving this handover request message, and for UE configures new carrying, if configuration successful, target eNB returns switching response message to source eNB.

After source eNB receives switching response message, send wireless heterogeneous networks (RadioResourceControl, RRC) reconfiguration message to UE, and stop reception and the transmission of data surface and chain of command.

After UE receives RRC reconfiguration message, start to stop and the data surface of source eNB and the reception of chain of command and transmission, carry out synchronization operation with target eNB.Wherein, after completing down-going synchronous, UE initiates uncontested random access procedure, uplink synchronous is completed by uncontested random access procedure, UE sends RRC to target eNB and has reshuffled message, after target eNB receives this message, return confirmation (ACK) message of RLC, start the transmission carrying out downlink data simultaneously.And UE is receiving after after the ACK message of this RLC, starting the up transmission of data surface.

In addition, at network side, in order to ensure the lossless operation of AM data, the PDCP SDU that source eNB is not confirmed to target eNB forward or newly arrives.

Target eNB receives after RRC reshuffled message, and will notify core net transduction pathway, after receiving the confirmation from core net, notification source eNB is discharged old carrying by target eNB.

In order to reduce the adjacent area interference of MPS process edge UE, Long Term Evolution strengthens (Long Term Evolution-Advance, LTE-A) system and have employed cooperative multipoint transmission technology (Coordinated-Multiple-Point, CoMP).Cooperative multipoint transmission technology refers to, the collaborative participation of multiple transfer points (Transmission Point, TP) that geographical position is separated is that a UE carries out transfer of data or combines the data of an acceptance UE transmission.In general, multiple transfer point can be the base station of different districts, also can be that the radio-frequency maser (Remote Radio Head, RRH) of different districts is descended with it in same base station.

Carry out global optimization scheduling whether there is Centroid, the implementation of CoMP technology is divided into non-central cooperative scheduling and center cooperative scheduling two kinds.Under the cooperative scheduling scene of center, dispatched the transmission of CoMP UE by center cooperative node (Central Coordination Node, CCN) and service base station collaboration.Under non-central scheduling scenario, between multiple cooperative base station, carry out repeatedly the mutual of schedule information, dispatch the transmission of CoMP UE in the mode of iteration scheduling.Wherein, CoMP UE refers to the UE supporting cooperative multipoint transmission.

When prior art carries out cell merge to UE, based on prerequisite be by serving BS, scheduling of resource is carried out to UE separately, do not have to consider to perform the CoMP UE of cooperative multipoint transmission carry out cell merge time, to the problem how cooperative multipoint transmission of CoMP UE processes.

Summary of the invention

The object of this invention is to provide the cooperative multipoint transmission control method in a kind of cell switch process and device, when carrying out cell merge with the CoMP UE solving execution cooperative multipoint transmission, to the problem how cooperative multipoint transmission of CoMP UE processes.

The object of the invention is to be achieved through the following technical solutions:

Embodiments provide the cooperative multipoint transmission control method in cell switch process.Wherein, cell switch process comprises: serving BS is after determining to carry out cell merge to terminal, handover request message is sent to target BS, and after the handover request ack message receiving the transmission of this target BS, switching command is sent, to indicate this terminal switch to the community of above-mentioned target BS to above-mentioned terminal.Wherein, this terminal is the terminal performing cooperative multipoint transmission.

In above-mentioned cell switch process, a kind of cooperative multipoint transmission control method of serving BS side comprises:

This serving BS is after determining to carry out cell merge to above-mentioned terminal, deexcitation is to the cooperative multipoint transmission of this terminal, and the message of instruction deexcitation cooperative multipoint transmission is sent to other access network nodes in the cooperation set of the cooperative multipoint transmission of this terminal of participation, carry the identification information of this terminal and the indication information of deexcitation cooperative multipoint transmission in the message of this instruction deexcitation multicast communication.

The method that the embodiment of the present invention provides, carrying out in cell switch process to terminal, the cooperative multipoint transmission of this terminal of serving BS deexcitation, the cooperative multipoint transmission of other access network node deexcitations in gathering for this terminal and instruction cooperates, do not need the continuity of the cooperative multipoint transmission ensureing terminal, solve and perform the CoMP UE of cooperative multipoint transmission when carrying out cell merge, to the problem how cooperative multipoint transmission of CoMP UE processes.

Wherein, participate in may comprising center cooperation point in the cooperation set of the cooperative multipoint transmission of above-mentioned terminal, also may comprise other cooperative base station outside serving BS.

In a kind of situation: if the cooperation set participating in the cooperative multipoint transmission of above-mentioned terminal comprises center cooperation point, preferably, other access network nodes to the cooperative multipoint transmission participating in above-mentioned terminal send the message of instruction deexcitation cooperative multipoint transmission, comprising: the message sending instruction deexcitation cooperative multipoint transmission to above-mentioned center cooperation point.Accordingly, send the message of instruction deexcitation cooperative multipoint transmission to above-mentioned center cooperation point after, the method can also comprise: serving BS receive the above-mentioned terminal that above-mentioned center cooperation point sends identification information, not to above-mentioned terminal transmission or the end position information not receiving the data of correct confirmation of above-mentioned terminal, this data start position information and these data; Serving BS associates identification information, these data, the start position information of these data and the end position information of these data of preserving this terminal.

In this case, if participate in other cooperative base station also comprised in the cooperation set of the cooperative multipoint transmission of above-mentioned terminal outside serving BS, preferably, send the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the above-mentioned terminal of participation, also comprise: the message sending instruction deexcitation cooperative multipoint transmission to other cooperative base station above-mentioned.

Notify the cooperative multipoint transmission of the above-mentioned terminal of other cooperative base station deexcitations, thus the coordinated multipoint transmission avoiding other cooperative base station to continue as above-mentioned terminal carries out dispatching/transmitting, interference is caused to cell switch process or the communication after switching.

In another kind of situation, if the access network node participated in the cooperation set of the cooperative multipoint transmission of above-mentioned terminal comprises other cooperative base station outside serving BS, but do not comprise center cooperation point, preferably, send the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the above-mentioned terminal of participation, comprising: the message sending instruction deexcitation cooperative multipoint transmission to other cooperative base station above-mentioned.Accordingly, send the message of instruction deexcitation cooperative multipoint transmission to above-mentioned other cooperative base station after, the method can also comprise: serving BS receive the above-mentioned terminal that other cooperative base station above-mentioned send identification information, not to this terminal transmission or the end position information not receiving the data of correct confirmation of this terminal, the start position information of these data and these data; Serving BS associates identification information, these data, the start position information of these data and the end position information of these data of preserving this terminal.

Based on any means embodiment of above-mentioned serving BS side, preferably, after receiving above-mentioned data, before receiving the handover request ack message of above-mentioned target BS transmission, the method also comprises: serving BS, according to the end position information of the start position information of these data with these data, is that above-mentioned terminal order dispatches above-mentioned data according to unicast pattern.

Due to before the switching request response receiving target BS transmission, it is terminal scheduling data that serving BS continues according to unicast pattern, thus improves the utilance of bearing resource.

Based on any means embodiment of above-mentioned serving BS side, preferably, serving BS, after determining to carry out cell merge to terminal, sends the message of instruction deexcitation cooperative multipoint transmission, can be specifically to other access network nodes in the cooperation set of the cooperative multipoint transmission of the above-mentioned terminal of participation:

When serving BS sends handover request message to above-mentioned target BS, also send the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the above-mentioned terminal of participation; Or,

After serving BS receives the handover request ack message of above-mentioned target BS transmission, other access network nodes to the cooperative multipoint transmission participating in above-mentioned terminal send the message of instruction deexcitation cooperative multipoint transmission.

Visible, the cooperative multipoint transmission control method that the embodiment of the present invention provides, do not need to change existing cell switch process, and can with the existing step executed in parallel of cell switch process, avoid, owing to controlling coordinated multipoint transmission in cell switch process, causing the time delay of cell merge.Especially, if after the handover request ack message receiving target BS transmission, the message of instruction deexcitation cooperative multipoint transmission is sent again to other access network nodes, effectively can avoid not having target BS that terminal can be allowed to access, and serving BS indicates the misoperation of other access network node deexcitation cooperative multipoint transmission.

In above-mentioned cell switch process, the cooperative multipoint transmission control method of a kind of access network node (this access network node refers to the access network node outside the serving BS of terminal in the cooperation set of the cooperative multipoint transmission participating in above-mentioned terminal) side comprises:

In the cooperation set of the cooperative multipoint transmission of participation terminal above-mentioned terminal serving BS outside the message of instruction deexcitation cooperative multipoint transmission that sends of the access network node serving BS that receives this terminal, carry the identification information of described terminal and the indication information of deexcitation cooperative multipoint transmission in the message of this instruction deexcitation multicast communication;

This access network node determines this terminal according to the identification information of above-mentioned terminal, and the instruction of indication information according to above-mentioned deexcitation cooperative multipoint transmission, the cooperative multipoint transmission of this terminal of deexcitation.

The method that the embodiment of the present invention provides, carrying out in cell switch process to terminal, other access network nodes in cooperation set are according to the cooperative multipoint transmission of the instruction deexcitation of serving BS for this terminal, do not need the continuity of the cooperative multipoint transmission ensureing terminal, solve and perform the CoMP UE of CoMP transmission when carrying out cell merge, to the problem how cooperative multipoint transmission of CoMP UE processes.

Wherein, access network node both can be the center cooperation point in above-mentioned cooperation set, also can be other cooperative base station in above-mentioned cooperation set outside serving BS.

In a kind of situation: if above-mentioned access network node is center cooperation point, preferably, after the message of the instruction deexcitation cooperative multipoint transmission that the serving BS of this center cooperation point receiving terminal sends, the method also comprises: this center cooperation point is by the identification information of above-mentioned terminal, the serving BS not sending to this terminal to this terminal transmission or the end position information that do not receive the data of correct confirmation of this terminal, the start position information of these data and these data.

Based on above-mentioned any access network node side embodiment of the method, preferably, if above-mentioned access network node is center cooperation point, after the message of the instruction deexcitation cooperative multipoint transmission of the serving BS transmission of this center cooperation point receiving terminal, the method also comprises: this center cooperation point sends the message of instruction deexcitation cooperative multipoint transmission to other cooperative base station outside serving BS in the cooperation set of the cooperative multipoint transmission of participation terminal, send in the message of this instruction deexcitation cooperative multipoint transmission of other cooperative base station above-mentioned and carry the identification information of above-mentioned terminal and the indication information of deexcitation cooperative multipoint transmission.

In another kind of situation: if above-mentioned access network node is other cooperative base station outside serving BS, preferably, after the message of the instruction deexcitation cooperative multipoint transmission that the serving BS of these other cooperative base station receiving terminals sends, the method also comprises: these other cooperative base station are by the identification information of above-mentioned terminal and the serving BS not sending to this terminal to this terminal transmission or the data of correct confirmation that do not receive this terminal.

Embodiments provide the cooperative multipoint transmission control method in another kind of cell switch process.Wherein, cell switch process comprises: the handover request message of the serving BS transmission of target BS receiving terminal, and after determining to allow described terminal switch to the community of described target BS, handover request ack message is sent to described serving BS, to carry out uplink and downlink synchronous with described terminal, to make described terminal switch to the community of described target BS, described terminal is the terminal performing cooperative multipoint transmission.

In above-mentioned cell switch process, described cooperative multipoint transmission control method comprises:

With described terminal complete uplink and downlink synchronous after, described target BS determines whether to carry out cooperative multipoint transmission to described terminal;

After determining that cooperative multipoint transmission is carried out to described terminal, if the cooperation set at described target BS place comprises center cooperation point, then described target BS sends to described center cooperation point the message that instruction activates cooperative multipoint transmission, and described instruction activates the identification information carrying described terminal in the message of cooperative multipoint transmission and the indication information activating cooperative multipoint transmission;

After determining that cooperative multipoint transmission is carried out to described terminal, if the cooperation set at described target BS place comprises other cooperative base station but does not comprise center cooperation point, then described target BS activates the cooperative multipoint transmission to described terminal, and sending to other cooperative base station in described cooperation set the message that instruction activates cooperative multipoint transmission, described instruction activates the identification information carrying described terminal in the message of cooperative multipoint transmission and the indication information activating cooperative multipoint transmission.

The method that the embodiment of the present invention provides, after completing the synchronization with terminal, target BS adjudicates the cooperative multipoint transmission whether started this terminal, and determining to start after to the cooperative multipoint transmission of this terminal, other access network nodes in triggered cooperative set activate the cooperative multipoint transmission to this terminal.After ensure that terminal switch to the community of target BS, still can continue cooperative multipoint transmission, solve and perform the CoMP UE of cooperative multipoint transmission when carrying out cell merge, to the problem how cooperative multipoint transmission of CoMP UE processes.

Embodiments provide a kind of base station, this base station comprises:

Cell switch determining module, carries out cell merge for determining to terminal;

Messaging interface, after determining to carry out cell merge to described terminal in described cell switch determining module, sends handover request message to target BS; After receiving the handover request ack message of described target BS transmission, send switching command to described terminal, to indicate described terminal switch to the community of described target BS, described terminal is the terminal performing cooperative multipoint transmission;

Cooperative multipoint transmission control module, after determining that cell merge is carried out to described terminal in described cell switch determining module, deexcitation is to the cooperative multipoint transmission of described terminal, and the message of instruction deexcitation cooperative multipoint transmission is sent to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation, carry the identification information of described terminal and the indication information of deexcitation cooperative multipoint transmission in the message of described instruction deexcitation multicast communication.

The base station that the embodiment of the present invention provides, carrying out in cell switch process to terminal, the cooperative multipoint transmission of this terminal of deexcitation, the cooperative multipoint transmission of other access network node deexcitations in gathering for this terminal and instruction cooperates, do not need the continuity of the cooperative multipoint transmission ensureing terminal, solve and perform the CoMP UE of cooperative multipoint transmission when carrying out cell merge, to the problem how cooperative multipoint transmission of CoMP UE processes.

In a kind of situation: if the cooperation set participating in the cooperative multipoint transmission of described terminal comprises center cooperation point, preferably, when described cooperative multipoint transmission control module sends the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation, specifically for:

The message of instruction deexcitation cooperative multipoint transmission is sent to described center cooperation point;

Send the message of instruction deexcitation cooperative multipoint transmission to described center cooperation point after, described cooperative multipoint transmission control module also for the identification information of: the described terminal that described center cooperation point sends, not to described terminal transmission or the end position information not receiving the data of correct confirmation of described terminal, described data start position information and described data; The identification information of described terminal, described data, the start position information of described data and the end position information of described data are preserved in association.

In this case, if participate in other cooperative base station also comprised in the cooperation set of the cooperative multipoint transmission of above-mentioned terminal outside serving BS, preferably, described cooperative multipoint transmission control module to participate in described terminal cooperative multipoint transmission cooperation set in other access network nodes send the message of instruction deexcitation cooperative multipoint transmission time, also for:

The message of instruction deexcitation cooperative multipoint transmission is sent to other cooperative base station in described cooperation set.

In another kind of situation, if the cooperation set participating in the cooperative multipoint transmission of described terminal comprises other cooperative base station outside described base station, but do not comprise center cooperation point, when described cooperative multipoint transmission sends the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation, specifically for:

The message of instruction deexcitation cooperative multipoint transmission is sent to other cooperative base station in described cooperation set;

After sending the message of instruction deexcitation cooperative multipoint transmission to other cooperative base station in described cooperation set, described cooperative multipoint transmission control module also for: receive the described terminal that other cooperative base station described send identification information and not to described terminal transmission or the data of correct confirmation not receiving described terminal; The identification information of described terminal and described data are preserved in association.

Based on any embodiment of above-mentioned base station (serving BS), preferably, after receiving described data, receive described target BS send handover request ack message before, described cooperative multipoint transmission control module also for:

According to the start position information of described data and the end position information of described data, be described terminal order schedule said data according to unicast pattern.

Based on any embodiment of above-mentioned base station (serving BS), preferably, to participate in described terminal cooperative multipoint transmission cooperation set in other access network nodes send the message of instruction deexcitation cooperative multipoint transmission time, described cooperative multipoint transmission control module specifically for:

When sending handover request message to described target BS, also send the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation; Or,

After receiving the handover request ack message of described target BS transmission, send the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation.

Visible, the base station (serving BS) that the embodiment of the present invention provides, does not need to change existing cell switch process, and can with the existing step executed in parallel of cell switch process, avoid, owing to controlling coordinated multipoint transmission in cell switch process, causing the time delay of cell merge.Especially, if after the handover request ack message receiving target BS transmission, the message of instruction deexcitation cooperative multipoint transmission is sent again to other access network nodes, effectively can avoid not having target BS that terminal can be allowed to access, and serving BS indicates the misoperation of other access network node deexcitation cooperative multipoint transmission.

Embodiments provide a kind of access network node, described access network node be the cooperative multipoint transmission of participation terminal cooperation set described in access network node outside Terminal Service base station, this access network node comprises:

Cooperative multipoint transmission instruction receiver module, for the message of the instruction deexcitation cooperative multipoint transmission that the serving BS receiving described terminal sends, in the message of described instruction deexcitation multicast communication, carry the identification information of described terminal and the indication information of deexcitation cooperative multipoint transmission;

Cooperative multipoint transmission deexcitation module, for determining described terminal according to the identification information of described terminal, and the instruction of indication information according to described deexcitation cooperative multipoint transmission, the cooperative multipoint transmission of terminal described in deexcitation.

The access network node that the embodiment of the present invention provides, carrying out in cell switch process to terminal, other access network nodes in cooperation set are according to the cooperative multipoint transmission of the instruction deexcitation of serving BS for this terminal, do not need the continuity of the cooperative multipoint transmission ensureing terminal, solve and perform the CoMP UE of CoMP transmission when carrying out cell merge, to the problem how cooperative multipoint transmission of CoMP UE processes.

If described access network node is center cooperation point, preferably, also comprise the first data transmission blocks;

After the message of the instruction deexcitation cooperative multipoint transmission that the serving BS of described cooperative multipoint transmission instruction receiver module receiving terminal sends, described first data transmission blocks is used for the identification information of described terminal, the serving BS not sending to described terminal to described terminal transmission or the end position information that do not receive the data of correct confirmation of described terminal, the start position information of described data and described data;

If described access network node is other cooperative base station outside serving BS, preferably, also comprise the second data transmission blocks;

After described cooperative multipoint transmission instruction receiver module is sent to the message of instruction deexcitation cooperative multipoint transmission, described second data transmission blocks is used for the identification information of described terminal and the serving BS not sending to described terminal to described terminal transmission or the data of correct confirmation that do not receive this terminal.

Based on above-mentioned any access network node embodiment, preferably, if described access network node is center cooperation point, also comprise cooperative multipoint transmission instruction sending module;

After the message of the instruction deexcitation cooperative multipoint transmission of the serving BS transmission of described cooperative multipoint transmission instruction receiver module receiving terminal, described cooperative multipoint transmission instruction sending module is used for the message sending instruction deexcitation cooperative multipoint transmission to other cooperative base station outside serving BS in the cooperation set of the cooperative multipoint transmission of participation terminal, sends in the message of the described instruction deexcitation cooperative multipoint transmission of other cooperative base station described and carries the identification information of described terminal and the indication information of deexcitation cooperative multipoint transmission.

The embodiment of the present invention also provides a kind of base station, and described base station comprises:

Messaging interface, the handover request message that the serving BS for receiving terminal sends, and after determining to allow described terminal switch to the community of described base station, send handover request ack message to described serving BS;

Synchronization module, for carry out uplink and downlink synchronous with described terminal, to make described terminal switch to the community of described base station, described terminal is the terminal performing cooperative multipoint transmission;

Cooperative multipoint transmission control module, for:

Described synchronization module and described terminal complete uplink and downlink synchronous after, determine whether to carry out cooperative multipoint transmission to described terminal;

After determining that cooperative multipoint transmission is carried out to described terminal, if the cooperation set at place, described base station comprises center cooperation point, then described base station sends to described center cooperation point the message that instruction activates cooperative multipoint transmission, and described instruction activates the identification information carrying described terminal in the message of cooperative multipoint transmission and the indication information activating cooperative multipoint transmission;

After determining that cooperative multipoint transmission is carried out to described terminal, if the cooperation set at place, described base station comprises other cooperative base station but does not comprise center cooperation point, then described base station activation is to the cooperative multipoint transmission of described terminal, and sending to other cooperative base station in described cooperation set the message that instruction activates cooperative multipoint transmission, described instruction activates the identification information carrying described terminal in the message of cooperative multipoint transmission and the indication information activating cooperative multipoint transmission.

The base station (target BS) that the embodiment of the present invention provides, after completing the synchronization with terminal, target BS adjudicates the cooperative multipoint transmission whether started this terminal, and determining to start after to the cooperative multipoint transmission of this terminal, other access network nodes in triggered cooperative set activate the cooperative multipoint transmission to this terminal.After ensure that terminal switch to the community of target BS, still can continue cooperative multipoint transmission, solve and perform the CoMP UE of cooperative multipoint transmission when carrying out cell merge, to the problem how cooperative multipoint transmission of CoMP UE processes.

Embodiments provide the cooperative multipoint transmission control device in a kind of handoff procedure, comprising:

Processor, this processor is configured to the cooperative multipoint transmission performed in cell switch process and cell switch process and controls;

When this processor is configured to perform cell switch process, specifically: after determining that cell merge is carried out to terminal, handover request message is sent to target BS, and after the handover request ack message receiving the transmission of this target BS, switching command is sent, to indicate this terminal switch to the community of above-mentioned target BS to above-mentioned terminal.Wherein, this terminal is the terminal performing cooperative multipoint transmission.

When this processor is configured to the cooperative multipoint transmission control performed in cell switch process, specifically: after determining that cell merge is carried out to above-mentioned terminal, deexcitation is to the cooperative multipoint transmission of this terminal, and the message of instruction deexcitation cooperative multipoint transmission is sent to other access network nodes in the cooperation set of the cooperative multipoint transmission of this terminal of participation, carry the identification information of this terminal and the indication information of deexcitation cooperative multipoint transmission in the message of this instruction deexcitation multicast communication.

Embodiments provide the cooperative multipoint transmission control device in another kind of handoff procedure, comprising:

Processor, the message of the instruction deexcitation cooperative multipoint transmission that the serving BS that this processor is configured to receive this terminal sends, carries the identification information of described terminal and the indication information of deexcitation cooperative multipoint transmission in the message of this instruction deexcitation multicast communication; This terminal is determined according to the identification information of above-mentioned terminal, and the instruction of indication information according to above-mentioned deexcitation cooperative multipoint transmission, the cooperative multipoint transmission of this terminal of deexcitation.

Embodiments provide the cooperative multipoint transmission control device in the third handoff procedure, comprising:

Processor, the handover request message that the serving BS that this processor is configured to receiving terminal sends, and after determining to allow described terminal switch to the community of described target BS, handover request ack message is sent to described serving BS, to carry out uplink and downlink synchronous with described terminal, to make described terminal switch to the community of described device, described terminal is the terminal performing cooperative multipoint transmission; With described terminal complete uplink and downlink synchronous after, determine whether to carry out cooperative multipoint transmission to described terminal; After determining that cooperative multipoint transmission is carried out to described terminal, if the cooperation set at described device place comprises center cooperation point, then send to described center cooperation point the message that instruction activates cooperative multipoint transmission, described instruction activates the identification information carrying described terminal in the message of cooperative multipoint transmission and the indication information activating cooperative multipoint transmission; After determining that cooperative multipoint transmission is carried out to described terminal, if the cooperation set at described device place comprises other cooperative base station but does not comprise center cooperation point, then to the cooperative multipoint transmission of described terminal, and sending to other cooperative base station in described cooperation set the message that instruction activates cooperative multipoint transmission, described instruction activates the identification information carrying described terminal in the message of cooperative multipoint transmission and the indication information activating cooperative multipoint transmission.

The device that the embodiment of the present invention provides, carrying out in cell switch process to terminal, the cooperative multipoint transmission of this terminal of deexcitation, do not need the continuity of the cooperative multipoint transmission ensureing terminal, solve and perform the CoMP UE of cooperative multipoint transmission when carrying out cell merge, to the problem how cooperative multipoint transmission of CoMP UE processes.

Accompanying drawing explanation

The first method schematic diagram that Fig. 1 provides for the embodiment of the present invention;

The second method schematic diagram that Fig. 2 provides for the embodiment of the present invention;

The third method schematic diagram that Fig. 3 provides for the embodiment of the present invention;

The 4th kind of method schematic diagram that Fig. 4 provides for the embodiment of the present invention;

The Lung biopsy schematic diagram that Fig. 5 provides for the embodiment of the present invention;

The first base station schematic diagram that Fig. 6 provides for the embodiment of the present invention;

The access network node schematic diagram that Fig. 7 provides for the embodiment of the present invention;

The second base station schematic diagram that Fig. 8 provides for the embodiment of the present invention.

Embodiment

The core concept of the embodiment of the present invention is: in cell switch process, do not need the continuity of the cooperative multipoint transmission (CoMP transmission) ensureing CoMP UE, serving BS (also the can be described as source base station) deexcitation of CoMP UE is to the CoMP transmission of this CoMP UE, and other access network node deexcitations in the cooperation set of the CoMP transmission of this CoMP UE of instruction participation are to the CoMP transmission of this CoMP UE.

The embodiment of the present invention is not only applicable to LTE, LTE-A network, is applicable to the communication network that other exist CoMP transmission too.

Before by reference to the accompanying drawings the embodiment of the present invention being described in detail, first the technical term related in the embodiment of the present invention is explained.

CoMP UE, refers to the UE supporting CoMP transmission.Due to the technical problem to be solved in the present invention be perform the CoMP UE of cooperative multipoint transmission carry out cell merge time, to the problem how cooperative multipoint transmission of CoMP UE processes.Therefore, the terminal related in the embodiment of the present invention, if no special instructions, all refers to the CoMP UE performing CoMP transmission.

Base station can be the eNB in LTE system, also can refer to the access network node possessing base station functions in follow-up evolution version.

Serving BS, refers to the base station belonging to the community that terminal accesses.

Cooperation set, refers to the set that the access network node providing CoMP transmission to serve for terminal is formed.

A CCN can be comprised in this cooperation set and comprise at least one cooperative base station of serving BS of terminal.

CCN, can be served as by a cooperative base station in cooperation set; Also can be the independent logical functional entity possessing comparatively degree of emphasizing/data-handling capacity, can perform CoMP transmission scheduling, this independent logical functional entity be deployed in a cooperative base station inside in cooperation set, or is deployed in one independently in network entity.

CCN can be that OAM is pre-configured, also can be (as each cooperative base station in certain area is selected to provide the wide base station covered) that each cooperative base station in certain area is determined from main separation.Interface between CCN with each cooperative base station in gathering that cooperates can continue to use existing X2 interface, also can define new interface, can set up interface connect when CCN activates.

Below in conjunction with accompanying drawing, the technical scheme that the embodiment of the present invention provides is described in detail.

Cooperative multipoint transmission control method in this cell switch process that cell switch process and the embodiment of the present invention provide as shown in Figure 1, specifically comprises following operation:

Step 100, serving BS are determined to carry out cell merge to terminal;

Step 110, serving BS send handover request message to target BS;

Step 120, serving BS receive the handover request ack message that this target BS sends;

Step 130, serving BS send switching command to this terminal, to indicate described terminal switch to the community of described target BS;

Serving BS is after determining to carry out cell merge to described terminal, also perform step 140, deexcitation to the cooperative multipoint transmission of this terminal, and send the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of this terminal of participation.

Wherein, indicate in the message of deexcitation multicast communication and at least carry the identification information of this terminal and the indication information of deexcitation cooperative multipoint transmission.

Wherein, serving BS deexcitation, to the cooperative multipoint transmission of this terminal, refers to no longer according to dispatch this terminal with the information interaction of other access network nodes in gathering that cooperate and/or transmit.Which operation it specifically comprises, and depending on the CoMP transmission pattern of this UE, the CoMP ability of serving BS etc., the embodiment of the present invention does not do concrete restriction.

In handling process shown in Fig. 1, serving BS is carrying out in cell switch process to terminal, the cooperative multipoint transmission of this terminal of deexcitation, the cooperative multipoint transmission of other access network node deexcitations in gathering for this terminal and instruction cooperates, do not need the continuity of the cooperative multipoint transmission ensureing terminal, solve and perform the CoMP UE of cooperative multipoint transmission when carrying out cell merge, to the problem how cooperative multipoint transmission of CoMP UE processes.In addition, as can be seen from Figure 1, the CoMP transmission control method that provides of the embodiment of the present invention, do not change original cell merge flow process, and can with original cell merge flow process executed in parallel, its implementation is simple, and can not cause the time delay of cell merge.

It is different that the access network node comprised is gathered in cooperation, and accordingly, the specific implementation of step 140 is also different.

Situation one: if participate in only comprising center cooperation point and serving BS in the cooperation set of the cooperative multipoint transmission of above-mentioned terminal, so, the message to other access network nodes transmission instruction deexcitation cooperative multipoint transmission in the cooperation set of the cooperative multipoint transmission of the above-mentioned terminal of participation refers to: the message sending instruction deexcitation cooperative multipoint transmission to this center cooperation point.

Wherein, in the message of the instruction deexcitation cooperative multipoint transmission sent to center cooperation point except carrying above-mentioned information, the identification information of the information of deexcitation reason, the identification information of serving BS and/or cell-of-origin can also be carried.

Situation two: if the cooperation set participating in the cooperative multipoint transmission of above-mentioned terminal comprises other cooperative base station outside center cooperative node, serving BS and serving BS, so, the message sending instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the above-mentioned terminal of participation can refer to: send instruction deexcitation cooperative multipoint transmission message to this center cooperation point, and sends instruction deexcitation cooperative multipoint transmission message to other cooperative base station in above-mentioned collaboration set conjunction.

Wherein, in the message of the instruction deexcitation cooperative multipoint transmission of center cooperation point transmission except carrying above-mentioned information, information of deexcitation reason etc. can also be carried.

In the message of the instruction deexcitation cooperative multipoint transmission sent to other cooperative base station except carrying above-mentioned information, the identification information of serving BS, cell-of-origin identification information, the running time-frequency resource information corresponding to cooperative multipoint transmission of terminal and/or the information of deexcitation reason etc. can also be carried.

Situation three: if the cooperation set participating in the cooperative multipoint transmission of above-mentioned terminal comprises other cooperative base station outside center cooperative node, serving BS and serving BS, so, the message to other access network nodes transmission instruction deexcitation cooperative multipoint transmission in the cooperation set of the cooperative multipoint transmission of the above-mentioned terminal of participation can also refer to: Jin Xianggai center cooperation point sends instruction deexcitation cooperative multipoint transmission message.

Accordingly, center cooperation point is after receiving instruction deexcitation cooperative multipoint transmission message, and other cooperative base station in closing to above-mentioned collaboration set send instruction deexcitation cooperative multipoint transmission message.

In the message of the instruction deexcitation cooperative multipoint transmission sent to other cooperative base station except carrying above-mentioned information, serving BS mark/cell-of-origin mark, the running time-frequency resource information corresponding to cooperative multipoint transmission of terminal and/or the information of deexcitation reason etc. can also be carried.

Situation four: if to participate in the cooperation set of the cooperative multipoint transmission of above-mentioned terminal other cooperative base station outside only serving BS and serving BS, so, the message to other access network nodes transmission instruction deexcitation cooperative multipoint transmission in the cooperation set of the cooperative multipoint transmission of the above-mentioned terminal of participation can also refer to: indicate deexcitation cooperative multipoint transmission message to other cooperative base station transmission in cooperation set.

Wherein, in the message of the instruction deexcitation cooperative multipoint transmission sent to other cooperative base station except carrying above-mentioned information, serving BS mark/cell-of-origin mark, the running time-frequency resource information corresponding to cooperative multipoint transmission of terminal and/or the information of deexcitation reason etc. can also be carried.

For above-mentioned situation one ~ situation three, if center cooperation point also has not to above-mentioned terminal transmission or the data of ACK not receiving above-mentioned terminal, also these data can be sent to serving BS.So, send the message of instruction deexcitation cooperative multipoint transmission to center cooperation point after, serving BS also may receive the above-mentioned terminal that above-mentioned center cooperation point sends identification information, not to this terminal transmission or the end position information not receiving the data of ACK of this terminal, this data start position information and these data; Then, serving BS associates identification information, these data, the start position information of these data and the end position information of these data of preserving this terminal.

For above-mentioned situation four, if there are other cooperative base station to also have not to above-mentioned terminal transmission or the data of ACK not receiving this terminal, also these data can be sent to serving BS.So, after other cooperative base station in closing to above-mentioned collaboration set send the message of instruction deexcitation cooperative multipoint transmission, serving BS also may receive the above-mentioned terminal that other cooperative base station send identification information, not to this terminal transmission or the end position information not receiving the data of ACK of this terminal, the start position information of these data and these data; Then, serving BS associates identification information, these data, the start position information of these data and the end position information of these data of preserving this terminal.

Wherein, the object that association is preserved is, serving BS, when needing to process for these data of this terminal, can pass through incidence relation, determines the data of this terminal and corresponding data message.The present invention does not limit the specific implementation that association is preserved.

For above-mentioned situation one ~ tetra-, if serving BS receive that center cooperation point or other cooperative base station send not to above-mentioned terminal transmission or the data of ACK not receiving this terminal, both can by these data interactions to target BS, also can before the handover request ack message receiving target BS transmission, according to start position information and the end position information of above-mentioned data, be that above-mentioned terminal order dispatches these data according to unicast pattern.

Based on the embodiment of the method for above-mentioned any serving BS side, the embodiment of the present invention does not limit the concrete time of implementation of step 140, as long as ensure to determine to carry out in the cell switch process after carrying out cell merge to terminal at serving BS.

Such as, serving BS when sending handover request message to target BS, also can send the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of participation terminal.That is, after determining that cell merge is carried out to terminal, serving BS parallel execution of steps 110 and step 140.Like this, can effectively ensure before cell merge completes, deexcitation, to the cooperative multipoint transmission of terminal, can not cause the time delay of cell merge, also can not cause interference to the communication after switching.

Again such as, serving BS after the handover request ack message receiving target BS transmission, can send the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the above-mentioned terminal of participation.Like this, effectively can avoid not having target BS that terminal can be allowed to access, and serving BS has indicated the misoperation of other access network node deexcitation cooperative multipoint transmission.

Cooperative multipoint transmission control method in the another kind of cell switch process that the embodiment of the present invention provides as shown in Figure 2, specifically comprises following operation:

The message of the instruction deexcitation cooperative multipoint transmission that the serving BS that the access network node in the cooperation set of the cooperative multipoint transmission of step 200, participation terminal outside this Terminal Service base station receives this terminal sends.

Wherein, the identification information of this terminal and the indication information of deexcitation cooperative multipoint transmission is at least taken in the message of this instruction deexcitation multicast communication.

Step 210, this access network node determine this terminal according to the identification information of above-mentioned terminal, and the instruction of indication information according to above-mentioned deexcitation cooperative multipoint transmission, the cooperative multipoint transmission of this terminal of deexcitation.

In the embodiment of the present invention, above-mentioned access network node both can be the CCN in above-mentioned cooperation set, also can be other cooperative base station in above-mentioned cooperation set outside serving BS.

If this access network node is CCN, the identification information of the information of deexcitation reason, the identification information of serving BS and/or cell-of-origin in the message of so above-mentioned instruction deexcitation cooperative multipoint transmission, can also be carried.

If this access network node is other cooperative base station, the identification information of serving BS, the identification information of cell-of-origin, the running time-frequency resource information corresponding to cooperative multipoint transmission of terminal and/or the information of deexcitation reason etc. in the message of so above-mentioned deexcitation cooperative multipoint transmission, can also be carried.

Wherein, access network node deexcitation, to the cooperative multipoint transmission of this terminal, refers to and stops all may affecting the behavior of serving BS to this terminal scheduling.Which operation it specifically comprises, and depending on the CoMP transmission pattern of this UE, the CoMP ability of this access network node etc., the embodiment of the present invention does not do concrete restriction.

Such as, if access network node is CCN, then this CCN is after the message receiving instruction deexcitation cooperative multipoint transmission, no longer carries out scheduling controlling to this UE.If be S-GW<->CCN<-> serving BS <-> terminal to the data surface path of the cooperative multipoint transmission of this terminal, this CCN also no longer carries out transfer of data to this UE.If this CCN also possesses the data buffer storage function to this terminal, this CCN no longer carries out buffer memory to the data of this terminal, and empties the data in buffer memory.

Such as, if access network node is other cooperative base station, then other cooperative base station are after the message receiving instruction deexcitation cooperative multipoint transmission, stop the transfer of data to this terminal, discharge the running time-frequency resource that the CoMP transmission of this terminal is corresponding.If when carrying out CoMP transmission to this terminal, be limited to use pre-coding matrix, other cooperative base station can also remove the restriction to this pre-coding matrix.In addition, for the data not yet transmitted, other cooperative base station can be abandoned, and do not give serving BS alternately.

In handling process shown in Fig. 2, carrying out in cell switch process to terminal, other access network node deexcitations in cooperation set are for the cooperative multipoint transmission of this terminal, do not need the continuity of the cooperative multipoint transmission ensureing terminal, solve and perform the CoMP UE of cooperative multipoint transmission when carrying out cell merge, to the problem how cooperative multipoint transmission of CoMP UE processes.

Based on the embodiment shown in Fig. 2, if access network node is CCN, and after the message receiving instruction deexcitation cooperative multipoint transmission, this CCN also has not to this terminal transmission or the data of ACK not receiving this terminal.So, after the message of the instruction deexcitation cooperative multipoint transmission that the serving BS of CCN receiving terminal sends, can also by the identification information of above-mentioned terminal, the serving BS not sending to this terminal to this terminal transmission or the end position information that do not receive the data of ACK of this terminal, the start position information of these data and these data.

Based on above-mentioned any access network node side embodiment of the method, if this access network node is CCN, and also have other cooperative base station in cooperation set.So, after the message of the instruction deexcitation cooperative multipoint transmission of the serving BS transmission of CCN receiving terminal, the message of instruction deexcitation cooperative multipoint transmission can also be sent to other cooperative base station outside serving BS in the cooperation set of the cooperative multipoint transmission of participation terminal, send in the message of the instruction deexcitation cooperative multipoint transmission of other cooperative base station and at least carry the identification information of this terminal and the indication information of deexcitation cooperative multipoint transmission.Optionally, serving BS mark, cell-of-origin mark, the running time-frequency resource information corresponding to cooperative multipoint transmission of terminal and/or the information of deexcitation reason etc. can also be carried in the message of this instruction deexcitation cooperative multipoint transmission.

From the description of serving BS side embodiment of the method, when also comprising other cooperative base station in the set that cooperates, serving BS also may send the message of instruction deexcitation cooperative multipoint transmission to other cooperative base station.In order to avoid repeating to send, pre-configured or agreement the message indicating deexcitation cooperative multipoint transmission specifically still can be sent to other cooperative base station by serving BS by CCN.

Based on the embodiment shown in Fig. 2, if access network node is other cooperative base station outside serving BS, this other cooperative base station also has not to this terminal transmission or the data of ACK not receiving this terminal.So, after the message of the instruction deexcitation cooperative multipoint transmission that the serving BS of other cooperative base station receiving terminals sends, can also by the identification information of above-mentioned terminal and the serving BS not sending to this terminal to this terminal transmission or the data of ACK that do not receive this terminal.Optionally, the start position information of these data and the end position information of these data can also be sent.

Cooperative multipoint transmission control method in the another kind of cell switch process that cell switch process and the embodiment of the present invention provide as shown in Figure 3, specifically comprises following operation:

The handover request message of the serving BS transmission of step 300, target BS receiving terminal;

Step 310, target BS determine the community allowing this terminal switch to target BS;

Step 320, target BS send handover request ack message to serving BS;

It is synchronous that step 330, target BS and this terminal carry out uplink and downlink, to make this terminal switch to the community of target BS.

Target BS and terminal complete uplink and downlink synchronous after, also perform step 340, target BS and determine whether to carry out cooperative multipoint transmission to this terminal;

After determining that cooperative multipoint transmission is carried out to this terminal, if the cooperation set at target BS place comprises center cooperation point, then perform 350a, target BS sends to this center cooperation point the message that instruction activates cooperative multipoint transmission, this instruction activates the identification information carrying this terminal in the message of cooperative multipoint transmission and the indication information activating cooperative multipoint transmission.

After determining that cooperative multipoint transmission is carried out to this terminal, if the cooperation set at target BS place comprises other cooperative base station but does not comprise center cooperation point, then perform step 350b, the cooperative multipoint transmission of target BS activation to this terminal, and sending to other cooperative base station in this cooperation set the message that instruction activates cooperative multipoint transmission, this instruction activates the identification information carrying this terminal in the message of cooperative multipoint transmission and the indication information activating cooperative multipoint transmission.

To coordinate with network side node below and be embodied as example, the method that the embodiment of the present invention provides will be described.

Before processing procedure is described, first introduce the data transmission architecture under the CoMP central dispatching scene of application the method.

Data transfer path between framework one: CoMP UE and core net is that S-GW<-> serving BS <->CoMP UE(and data-direct connection interface are present between the serving BS of S-GW and CoMP UE), CCN and serving BS all possess scheduling feature.

Under this framework, the cooperative scheduling that CCN and serving BS perform can have following several implementation:

CCN performs the master scheduling function to CoMP UE, and serving BS is dispatched and transfer of data according to CCN scheduled for executing CoMP UE transfer of data and non-CoMP UE;

CCN performs the master scheduling function to CoMP UE, and responsible CoMP UE dispatches cooperative multipoint transmission transmission, and serving BS is responsible for the scheduling of CoMP UE unicast and scheduling and the transfer of data such as transmission and non-CoMP UE scheduling;

CCN performs the pre-scheduling to CoMP UE, and serving BS performs the actual schedule of CoMP UE.

In addition, CCN also can possess the buffer memory (buffer) to CoMP UE temporary data storage function and correspondence further.

Data transfer path between framework two: CoMP UE and core net is that S-GW<->CCN<-> serving BS <->UE(and data-direct connection interface are present between S-GW and CCN), CCN and serving BS all possess scheduling feature.

Under this framework, CCN is the data relay point of CoMP UE and core net.In UE RCC connection establishment process, serving BS knows UE type, if support the UE of CoMP transmission, to factors such as the tenability situation of CoMP and network side strategies, serving BS judges whether that the RAN side user plane anchor point indicating this UE of core net to be connected is CCN according to UE type (whether supporting CoMP transmission), current network; Or utilize prior art that user face anchor point is based upon serving BS, can when triggering CoMP UE cooperative multipoint transmission, changing user face anchor point by processes such as switching, path handover request (path switch request) is CCN.Especially, under this framework, the control plane anchor point of user can be the serving BS of this UE, also can be MME<->CCN<-> serving BS <-> terminal by chain of command route diversion, to reduce handover overhead.

Scheduling implementation under this framework and framework one similar, repeat no more here.

For above-mentioned framework one, switch to example with X2, the CoMP transmission control method in a kind of handoff procedure and handoff procedure as shown in Figure 4, specifically comprises following operation:

Step 400, serving BS are determined to carry out cell merge to CoMP UE.

Concrete, serving BS reports handover measurement reported result (as RSRP/RSRQ) according to CoMP UE, determines whether to meet switching condition.If met, then determine to carry out cell merge to CoMP UE.

Step 410a, serving BS send handover request message to each alternative target base station.

Wherein, handoff request message prepares relevant parameter containing switching, and performs the work such as acceptance judging, radio-resource-configuration in order to help alternative target base station.

Step 420a, permission receive the alternative target base station of above-mentioned CoMP UE to send switching request response to serving BS.

Concrete, each alternative target base station receives the handover request message that serving BS sends, and carries out acceptance judging according to information such as service quality (QoS) information of carrying to be accepted, current interference, load conditions.If alternative target base station allows to receive this CoMP UE, then carry out bottom configuration, to prepare to switch.

The wireless resource configuration to this CoMP UE is at least carried to the handover request ack message that serving BS returns in alternative target base station.

Step 430a, serving BS receive alternative target base station send handover request ack message after, to CoMP UE send switching command, stop the data transmit-receive of this CoMP UE on this base station, and will not transmit or unacknowledged data alternately give target BS.

Wherein, if there is multiple alternative target base station to return handover request ack message to serving BS, then serving BS therefrom selects one as target BS.

Wherein, serving BS sends to the switching command of CoMP UE can be carried in RRC connection reconfiguration message.

Step 440a, CoMP UE switch to the community of target BS after performing the synchronization with target BS.

Concrete, after CoMP UE receives the switching command of serving BS transmission, stop, with the data transmit-receive of serving BS, performing synchronization with target BS and operating, carry out Radio Resource and carrying reprovision.

After synchronously completing, CoMP UE returns handoff completion message (RRC has reshuffled message) to target BS.After target BS receives this message, return the ACK message of RLC, start the transmission carrying out downlink data simultaneously; And notify core net transduction pathway (trigger path switch request process, notice core network data transmission path changes to SGW<-> target BS <->CoMP UE).After target BS receives path Handover Request Acknowledge (path switch request ack), notification service base station discharges old carrying and UE context.CoMP UE, after receiving RRC and having reshuffled the ACK of message, carries out upstream data transmission with target BS target.

Optionally, target BS (namely, serving BS after switching) according to the wireless channel condition of the type (whether supporting CoMP transmission) of above-mentioned CoMP UE, above-mentioned CoMP UE, the factor such as ability, base station strategy of this base station support CoMP, determine whether to start the CoMP transmission to above-mentioned CoMP UE.

If determine to start the CoMP transmission to above-mentioned CoMP UE, but be the non-TM10 of transmission mode of UE configuration before, then target BS needs to reshuffle CoMP UE transmission mode is TM10.

If target BS is determined not start the CoMP transmission to above-mentioned CoMP UE, then according to unicast pattern, scheduled transmission is carried out to this CoMP UE.

If target BS is determined to start the CoMP transmission to above-mentioned CoMP UE, target BS sends to the CCN of this target BS place cooperation set the message indicating CoMP transmission to activate.

Concrete, if target BS does not connect with its CCN, then target BS triggers the connection establishment process between CCN, and after connection establishment completes, sends the message of instruction CoMP transmission activation to its CCN.At least comprise the identification information of CoMP UE, the identification information of this target BS, the identification information of present access subzone in this message and/or activate the information such as reason.

If the framework of target BS and its CCN is above-mentioned framework two, target BS judge to activate CoMP UE cooperative multipoint transmission function and when notifying CCN, trigger handoff procedure simultaneously, or path switch request, or other existing processes, change CoMP UE transfer of data anchor point, changes to CCN by the transfer of data anchor point of this CoMP UE.Or the cooperative multipoint transmission of CoMP UE also can be activated by CCN.

Step 410b, serving BS deexcitation to the CoMP transmission of CoMP UE, and send the message of instruction deexcitation CoMP transmission to CCN.

Wherein, the message of the instruction deexcitation CoMP transmission of CCN is sent at least to carry identification information and the CoMP transmission deexcitation indication information of this CoMP UE.Optionally, the information such as deexcitation reason can also be carried.

It should be pointed out that step 410a and step 410b can executed in parallel, the priority do not existed in sequential limits.

Step 420b, CCN carry out the operation of deexcitation CoMP transmission after receiving the message of the instruction deexcitation CoMP transmission that serving BS sends to this CoMP UE.

Concrete, CCN first according to the identification information of the CoMP UE carried in message, determine this message for CoMP UE.Then, according to the CoMP transmission deexcitation indication information carried in message, to the cooperative multipoint transmission controlling functions deexcitation of this CoMP UE, no longer scheduling controlling is carried out to the transfer of data of this CoMP UE, no longer carry out the transfer of data to CoMP UE, the behavior stopping all may affecting serving BS dispatching this CoMP UE.If when CCN also possesses the buffer to CoMP UE temporary data storage function and correspondence, CCN also deexcitation to should the temporary data storage function of CoMP UE, and empties the data in buffer.

If also carry the information of deexcitation reason in message, CCN also records this deexcitation reason, so that subsequent analysis controls to use.

Optionally, other cooperative base station also comprised in the cooperation set of the CoMP transmission of above-mentioned CoMP UE outside serving BS if participate in, can also be sent the message of instruction deexcitation CoMP transmission to other cooperative base station in cooperation set by serving BS.

Send to the identification information and CoMP transmission deexcitation indication information that at least carry above-mentioned CoMP UE in the message of the instruction deexcitation CoMP transmission of other cooperative base station.Optionally, following at least one information can also be comprised: the information such as running time-frequency resource information, deexcitation reason that the CoMP transmission of the identification information of serving BS, the identification information of cell-of-origin, this CoMP UE is corresponding.

It should be pointed out that the priority that this operation and step 410b do not exist in sequential limits, can executed in parallel.

Optionally, other cooperative base station also comprised in the cooperation set of the CoMP transmission of above-mentioned CoMP UE outside serving BS if participate in, after can also receiving the message of instruction deexcitation CoMP transmission by CCN, send the message of instruction deexcitation CoMP transmission to other cooperative base station in cooperation set.

Other cooperative base station in cooperation set are after the message receiving instruction deexcitation CoMP transmission, and deexcitation is to the CoMP transmission of CoMP UE.

Concrete, other cooperative base station first according to the identification information of the CoMP UE carried in message, determine this message for CoMP UE.Then, according to the CoMP transmission deexcitation indication information carried in message, no longer carry out the transfer of data to CoMP UE, discharge running time-frequency resource corresponding to the CoMP transmission of this CoMP UE and (if carry the information of this running time-frequency resource in message, then discharge corresponding running time-frequency resource according to the information of this running time-frequency resource.If do not carried, then determine this running time-frequency resource by other means, this running time-frequency resource information is preserved in such as this locality, or obtains this running time-frequency resource information etc. from serving BS or CCN separately).If when carrying out CoMP transmission to this CoMP UE, be limited to use pre-coding matrix, other cooperative base station can also remove the restriction to this pre-coding matrix.If also carry the information of deexcitation reason in message, other cooperative base station also preserve the information of this deexcitation reason, to analyze use in the future.For not yet transmit to the data of this CoMP UE, other cooperative base station can be abandoned, and do not give serving BS alternately.

For above-mentioned framework two, switch to example with X2, the CoMP transmission control method in a kind of handoff procedure and handoff procedure can with reference to the handling process of Fig. 4.

But, receive the message of the instruction deexcitation CoMP transmission that serving BS sends at CCN after, if there are the data of the ACK not transmitting or do not receive above-mentioned CoMP UE to above-mentioned CoMP UE, to serving BS send this CoMP UE identification information, do not transmit to CoMP UE and/or do not receive the data (these data are made up of several RB) of ACK of this CoMP UE, ED (data end) mark that each RB is corresponding, the data that each RB is corresponding start the information such as (data start) mark.

The data end mark that the identification information of serving BS association preservation CoMP UE, above-mentioned data, each RB are corresponding and data start identify.

For the data that CCN sends, serving BS both can be dispatched according to non-cooperating multicast communication these data before receiving switching request response.Also can in hand-off execution process, by these data in company with data notification waiting for transmission to target BS.

After serving BS receives release instruction, trigger between CCN should the Connection Release process of interface of CoMP UE.

For above-mentioned framework one, switch to example with X2, the another kind of CoMP transmission control method in handoff procedure and handoff procedure as shown in Figure 5, specifically comprises following operation:

Step 500 is with step 400, and step 510a ~ step 540a, with step 410a ~ step 440a, repeats no more here.

After serving BS receives the handover request ack message of alternative target base station transmission, perform step 530b, serving BS deexcitation to the CoMP transmission of CoMP UE, and send the message of instruction deexcitation CoMP transmission to CCN.

It should be pointed out that step 530a and step 530b can executed in parallel, the priority do not existed in sequential limits.

Step 540b, with step 520b, repeats no more here.

It should be pointed out that the priority that this operation and step 530b do not exist in sequential limits, can executed in parallel.

For above-mentioned framework two, switch to example with X2, the another kind of CoMP transmission control method in handoff procedure and handoff procedure can with reference to the handling process of Fig. 5.

Based on the inventive concept same with method, embodiments provide a kind of base station, as shown in Figure 6, this base station comprises:

Cell switch determining module 601, carries out cell merge for determining to terminal;

Messaging interface 602, after determining to carry out cell merge to described terminal in described cell switch determining module 601, sends handover request message to target BS; After receiving the handover request ack message of described target BS transmission, send switching command to described terminal, to indicate described terminal switch to the community of described target BS, described terminal is the terminal performing cooperative multipoint transmission;

Cooperative multipoint transmission control module 603, after determining that cell merge is carried out to described terminal in described cell switch determining module, deexcitation is to the cooperative multipoint transmission of described terminal, and the message of instruction deexcitation cooperative multipoint transmission is sent to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation, carry the identification information of described terminal and the indication information of deexcitation cooperative multipoint transmission in the message of described instruction deexcitation multicast communication.

In a kind of situation: if the cooperation set participating in the cooperative multipoint transmission of described terminal comprises center cooperation point, preferably, when described cooperative multipoint transmission control module 603 sends the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation, specifically for:

In this case, if participate in other cooperative base station also comprised in the cooperation set of the cooperative multipoint transmission of above-mentioned terminal outside serving BS, preferably, described cooperative multipoint transmission control module 603 to participate in described terminal cooperative multipoint transmission cooperation set in other access network nodes send the message of instruction deexcitation cooperative multipoint transmission time, also for:

In another kind of situation, if the cooperation set participating in the cooperative multipoint transmission of described terminal comprises other cooperative base station outside described base station, but do not comprise center cooperation point, when described cooperative multipoint transmission control module 603 sends the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation, specifically for:

After sending the message of instruction deexcitation cooperative multipoint transmission to other cooperative base station in described cooperation set, described cooperative multipoint transmission control module also for: receive the identification information of the described terminal that other cooperative base station described send, not to described terminal transmission or the end position information not receiving the data of correct confirmation of described terminal, the start position information of these data and these data; The identification information of described terminal, described data, the start position information of these data and the end position information of these data are preserved in association.

Based on any embodiment of above-mentioned base station (serving BS), preferably, after receiving described data, receive described target BS send handover request ack message before, described cooperative multipoint transmission control module 603 also for:

Be data described in described terminal scheduling according to unicast pattern.

Based on any embodiment of above-mentioned base station (serving BS), preferably, to participate in described terminal cooperative multipoint transmission cooperation set in other access network nodes send the message of instruction deexcitation cooperative multipoint transmission time, described cooperative multipoint transmission control module 603 specifically for:

Based on the inventive concept same with method, embodiments provide a kind of access network node, described access network node be the cooperative multipoint transmission of participation terminal cooperation set described in access network node outside Terminal Service base station, as shown in Figure 7, this access network node comprises:

Cooperative multipoint transmission instruction receiver module 701, for the message of the instruction deexcitation cooperative multipoint transmission that the serving BS receiving described terminal sends, in the message of described instruction deexcitation multicast communication, carry the identification information of described terminal and the indication information of deexcitation cooperative multipoint transmission;

Cooperative multipoint transmission deexcitation module 702, for determining described terminal according to the identification information of described terminal, and the instruction of indication information according to described deexcitation cooperative multipoint transmission, the cooperative multipoint transmission of terminal described in deexcitation.

After described cooperative multipoint transmission instruction receiver module is sent to the message of instruction deexcitation cooperative multipoint transmission, described second data transmission blocks is used for the identification information of described terminal and the serving BS not sending to described terminal to described terminal transmission or the data of correct confirmation that do not receive described terminal.

Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of base station, and as shown in Figure 8, this base station comprises:

Messaging interface 801, the handover request message that the serving BS for receiving terminal sends, and after determining to allow described terminal switch to the community of described base station, send handover request ack message to described serving BS;

Synchronization module 802, for carry out uplink and downlink synchronous with described terminal, to make described terminal switch to the community of described base station, described terminal is the terminal performing cooperative multipoint transmission;

Cooperative multipoint transmission control module 803, for:

Described synchronization module 802 and described terminal complete uplink and downlink synchronous after, determine whether to carry out cooperative multipoint transmission to described terminal;

Based on the inventive concept same with method, embodiments provide the cooperative multipoint transmission control device in a kind of handoff procedure, comprising:

Based on the inventive concept same with method, embodiments provide the cooperative multipoint transmission control device in another kind of handoff procedure, comprising:

Based on the inventive concept same with method, embodiments provide the cooperative multipoint transmission control device in the third handoff procedure, comprising:

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims

1. the cooperative multipoint transmission control method in a cell switch process, described cell switch process comprises: serving BS is after determining to carry out cell merge to terminal, handover request message is sent to target BS, and after the handover request ack message receiving the transmission of described target BS, switching command is sent to described terminal, to indicate described terminal switch to the community of described target BS, described terminal is the terminal performing cooperative multipoint transmission; It is characterized in that, described cooperative multipoint transmission control method comprises:

Described serving BS is after determining to carry out cell merge to described terminal, deexcitation is to the cooperative multipoint transmission of described terminal, and the message of instruction deexcitation cooperative multipoint transmission is sent to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation, carry the identification information of described terminal and the indication information of deexcitation cooperative multipoint transmission in the message of described instruction deexcitation multicast communication.

2. method according to claim 1, it is characterized in that, if the cooperation set participating in the cooperative multipoint transmission of described terminal comprises center cooperation point, other access network nodes in the cooperation set of described from the cooperative multipoint transmission to the described terminal of participation send the message of instruction deexcitation cooperative multipoint transmission, comprising:

Send the message of instruction deexcitation cooperative multipoint transmission to described center cooperation point after, the method also comprises:

Described serving BS receive the described terminal that described center cooperation point sends identification information, not to described terminal transmission or the end position information not receiving the data of correct confirmation of described terminal, the start position information of described data and described data;

The identification information of described terminal, described data, the start position information of described data and the end position information of described data are preserved in described serving BS association.

3. method according to claim 2, it is characterized in that, if participate in other cooperative base station also comprised in the cooperation set of the cooperative multipoint transmission of described terminal outside described serving BS, other access network nodes in the cooperation set of described from the cooperative multipoint transmission to the described terminal of participation send the message of instruction deexcitation cooperative multipoint transmission, also comprise:

4. method according to claim 1, it is characterized in that, if the cooperation set participating in the cooperative multipoint transmission of described terminal comprises other cooperative base station outside described serving BS, but do not comprise center cooperation point, other access network nodes in the cooperation set of described from the cooperative multipoint transmission to the described terminal of participation send the message of instruction deexcitation cooperative multipoint transmission, comprising:

After sending the message of instruction deexcitation cooperative multipoint transmission to other cooperative base station in described cooperation set, the method also comprises:

Described serving BS receive the described terminal that other cooperative base station described send identification information, not to described terminal transmission or the end position information not receiving the data of correct confirmation of described terminal, the start position information of described data and described data;

5. the method according to any one of claim 2 ~ 4, is characterized in that, after receiving described data, before receiving the handover request ack message of described target BS transmission, the method also comprises:

Described serving BS, according to the start position information of described data and the end position information carrying described data, is described terminal order schedule said data according to unicast pattern.

6. method according to claim 1, it is characterized in that, described serving BS, after determining to carry out cell merge to terminal, sends the message of instruction deexcitation cooperative multipoint transmission, comprising to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation:

When described serving BS sends handover request message to described target BS, also send the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation; Or,

After described serving BS receives the handover request ack message of described target BS transmission, send the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation.

7. the cooperative multipoint transmission control method in cell switch process, is characterized in that, comprising:

The message of the instruction deexcitation cooperative multipoint transmission that the serving BS that the access network node outside Terminal Service base station described in the cooperation set of the cooperative multipoint transmission of participation terminal receives described terminal sends, carries the identification information of described terminal and the indication information of deexcitation cooperative multipoint transmission in the message of described instruction deexcitation multicast communication;

Described access network node determines described terminal according to the identification information of described terminal, and the instruction of indication information according to described deexcitation cooperative multipoint transmission, the cooperative multipoint transmission of terminal described in deexcitation.

8. method according to claim 7, is characterized in that, if described access network node is center cooperation point, after the message of the instruction deexcitation cooperative multipoint transmission of the serving BS transmission of described center cooperation point receiving terminal, the method also comprises:

Described center cooperation point is by the identification information of described terminal, the serving BS not sending to described terminal to described terminal transmission or the end position information that do not receive the data of correct confirmation of described terminal, the start position information of described data and described data;

If described access network node is other cooperative base station outside serving BS, after the message of the instruction deexcitation cooperative multipoint transmission of the serving BS transmission of other cooperative base station receiving terminals described, the method also comprises:

Other cooperative base station described are by the identification information of described terminal, the serving BS not sending to described terminal to described terminal transmission or the end position information that do not receive the data of correct confirmation of described terminal, the start position information of described data and described data.

9. the method according to claim 7 or 8, is characterized in that, if described access network node is center cooperation point, after the message of the instruction deexcitation cooperative multipoint transmission of the serving BS transmission of described center cooperation point receiving terminal, the method also comprises:

Described center cooperation point sends the message of instruction deexcitation cooperative multipoint transmission to other cooperative base station outside serving BS in the cooperation set of the cooperative multipoint transmission of participation terminal, sends in the message of the described instruction deexcitation cooperative multipoint transmission of other cooperative base station described and carries the identification information of described terminal and the indication information of deexcitation cooperative multipoint transmission.

10. the cooperative multipoint transmission control method in a cell switch process, described cell switch process comprises: the handover request message of the serving BS transmission of target BS receiving terminal, and after determining to allow described terminal switch to the community of described target BS, handover request ack message is sent to described serving BS, to carry out uplink and downlink synchronous with described terminal, to make described terminal switch to the community of described target BS, described terminal is the terminal performing cooperative multipoint transmission; It is characterized in that, described cooperative multipoint transmission control method comprises:

11. 1 kinds of base stations, described base station comprises:

It is characterized in that, described base station also comprises:

12. base stations according to claim 11, it is characterized in that, if the cooperation set participating in the cooperative multipoint transmission of described terminal comprises center cooperation point, when described cooperative multipoint transmission control module sends the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation, specifically for:

13. base stations according to claim 12, it is characterized in that, if participate in other cooperative base station also comprised in the cooperation set of the cooperative multipoint transmission of described terminal outside described base station, described cooperative multipoint transmission control module to participate in described terminal cooperative multipoint transmission cooperation set in other access network nodes send the message of instruction deexcitation cooperative multipoint transmission time, also for:

14. base stations according to claim 11, it is characterized in that, if the cooperation set participating in the cooperative multipoint transmission of described terminal comprises other cooperative base station outside described base station, but do not comprise center cooperation point, when described cooperative multipoint transmission sends the message of instruction deexcitation cooperative multipoint transmission to other access network nodes in the cooperation set of the cooperative multipoint transmission of the described terminal of participation, specifically for:

After sending the message of instruction deexcitation cooperative multipoint transmission to other cooperative base station in described cooperation set, described cooperative multipoint transmission control module also for: receive the identification information of the described terminal that other cooperative base station described send, not to described terminal transmission or the end position information not receiving the data of correct confirmation of described terminal, described data start position information and described data; The identification information of described terminal, described data, the start position information of described data and the end position information of described data are preserved in association.

15. base stations according to any one of claim 12 ~ 14, is characterized in that, after receiving described data, before receiving the handover request ack message that described target BS sends, described cooperative multipoint transmission control module also for:

According to the carrying start position information of described data and described data end position information, be described terminal order schedule said data according to unicast pattern.

16. base stations according to claim 11, it is characterized in that, to participate in described terminal cooperative multipoint transmission cooperation set in other access network nodes send the message of instruction deexcitation cooperative multipoint transmission time, described cooperative multipoint transmission control module specifically for:

17. 1 kinds of access network nodes, is characterized in that, described access network node be the cooperative multipoint transmission of participation terminal cooperation set described in access network node outside Terminal Service base station, this access network node comprises:

18. access network nodes according to claim 17, is characterized in that, if described access network node is center cooperation point, also comprise the first data transmission blocks;

If described access network node is other cooperative base station outside serving BS, also comprise the second data transmission blocks;

After described cooperative multipoint transmission instruction receiver module is sent to the message of instruction deexcitation cooperative multipoint transmission, described second data transmission blocks is used for the identification information of described terminal, the serving BS not sending to described terminal to described terminal transmission or the end position information that do not receive the data of correct confirmation of described terminal, the start position information of described data and described data.

19. access network nodes according to claim 17 or 18, is characterized in that, if described access network node is center cooperation point, also comprise cooperative multipoint transmission instruction sending module;

20. 1 kinds of base stations, described base station comprises:

It is characterized in that, described base station also comprises:

Cooperative multipoint transmission control module, for: