CN102084672B - Method for coordinated multi point communication and device therefor - Google Patents
Method for coordinated multi point communication and device therefor Download PDFInfo
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- CN102084672B CN102084672B CN200980124701.3A CN200980124701A CN102084672B CN 102084672 B CN102084672 B CN 102084672B CN 200980124701 A CN200980124701 A CN 200980124701A CN 102084672 B CN102084672 B CN 102084672B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/04—Wireless resource allocation
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0042—Arrangements for allocating sub-channels of the transmission path intra-user or intra-terminal allocation
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Abstract
A method for coordinated multi-point (CoMP) communication and a device therefor are provided in the present invention. The method includes the following steps: downlink data of a CoMP transmission service user is assigned to a special channel of a special subframe, wherein said channel acts as a dedicated channel for said user; said subframe is transmitted. In the present invention, a network deals separately with CoMP users and non-CoMP users, and the downlink data of a CoMP user is carried by a dedicated channel allocated for the CoMP user in the special structure subframe.
Description
Technical field
The present invention relates to communication technical field, be specifically related to coordinate the method and apparatus of multi-point.
Background technology
Mobile communication system research and development direction is to provide higher peak user throughput, average user throughput and edge customer throughput, gives with the transfer of data of user Geng Jia and experiences.Beginning application coordination multicast communication (CoMP in the third generation mobile communication system, Coordinated Multi Point Transmission and Reception) technology, the CoMP technology is mainly to utilize a plurality of access points (Access Point) that are separated from each other on the geographical position simultaneously for one or more users provide service, to improve the user data receiving gain.The CoMP technology helps the utmost point significantly to improve spectrum utilization efficiency.
For ease of statement, the below will adopt the communication system of CoMP technology to be called the coordination multipoint communication system.See also Fig. 1, Fig. 1 shows a kind of topological structure of coordinating multipoint communication system, and wherein, access point 1, access point 2 and access point 3 provide service for terminal 1; Access point 4, access point 5 and access point 6 provide service for terminal 2; Access point 5, access point 7 and access point 9 provide service for terminal 3; Access point 7, access point 8 and access point 9 provide service for terminal 4.Access point 1, access point 2 and access point 3 belong to base station 1; Access point 4, access point 5 and access point 6 belong to base station 2; Access point 7, access point 8 and access point 9 belong to base station 3.
In coordination multipoint communication system shown in Figure 1, same base station may be belonged to for same terminal provides a plurality of access points of service, also different base stations may be belonged to.Access point under the control of its home base station, transceiving data.Can comprise one or more access points in single subdistrict.
For ease of statement, the below will accept the user of coordinated multipoint transmission service referred to as CoMP user, will not accept the user of coordinated multipoint transmission service referred to as non-CoMP user.
At present, in coordinating multipoint communication system, network side adopts identical channel to provide service for CoMP user and non-CoMP user usually, adopts aforesaid way possibly can't complete for the specific function of CoMP service and performance optimization etc.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of method and apparatus of coordinating multi-point is provided, and is conducive to complete specific function and performance optimization for the CoMP service.
For solving the problems of the technologies described above, the technical scheme that provides in the embodiment of the present invention is as follows:
A kind of method of coordinating multi-point comprises: will accept the downlink data dispatching of coordinated multipoint transmission service-user to the special channel of special subframe, the special channel of described special subframe is as the dedicated channel of accepting the coordinated multipoint transmission service-user; Send described special subframe.
A kind of method of coordinating multi-point comprises: receive the downlink data of the special channel carrying of special subframe, the special channel of described special subframe is as the dedicated channel of accepting the coordinated multipoint transmission service-user; The downlink data of the special channel carrying of the described special subframe that demodulation process receives.
A kind of access network equipment, comprise: the data dispatch module, be used for accepting the downlink data dispatching of coordinated multipoint transmission service-user to the special channel of special subframe, the special channel of described special subframe is as the dedicated channel of accepting the coordinated multipoint transmission service-user; Sending module is used for sending described special subframe.
A kind of terminal comprises: the first receiver module, and for the downlink data of the special channel carrying that receives special subframe, the special channel of described special subframe is the dedicated channel of accepting the coordinated multipoint transmission service-user; The demodulation process module is used for the downlink data of the special channel carrying of the described special subframe that demodulation process the first receiver module receives.
Can be found out by technique scheme, the technical scheme of the embodiment of the present invention has following advantage: network side is treated CoMP user and non-CoMP user with a certain discrimination, utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's downlink data, be conducive to complete for the specific function of CoMP service and performance optimization etc.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention and technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment and description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of topological structure schematic diagram of coordinating multipoint communication system that prior art provides;
Fig. 2 is a kind of method flow diagram of coordinating multi-point that the embodiment of the present invention one provides;
Fig. 3 is a kind of method flow diagram of coordinating multi-point that the embodiment of the present invention two provides;
Fig. 4-a is the structural representation of a kind of common subframe of providing of the embodiment of the present invention two;
Fig. 4-b is the structural representation of a kind of special subframe of providing of the embodiment of the present invention two;
Fig. 4-c is the structural representation of the another kind of special subframe that provides of the embodiment of the present invention two;
Fig. 4-d is the structural representation of the another kind of special subframe that provides of the embodiment of the present invention two;
Fig. 4-e is the structural representation of the another kind of special subframe that provides of the embodiment of the present invention two;
Fig. 5 is a kind of cell combination schematic diagram that the embodiment of the present invention three provides;
Fig. 6 is a kind of access network equipment structural representation that the embodiment of the present invention four provides;
Fig. 7 is a kind of terminal structure schematic diagram that the embodiment of the present invention five provides.
Embodiment
A kind of method and apparatus of coordinating multi-point is provided in the embodiment of the present invention, network side is treated CoMP user and non-CoMP user with a certain discrimination, utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's downlink data, be conducive to complete for the specific function of CoMP service and performance optimization etc.
Below by specific embodiment, be described in detail respectively.
See also Fig. 2, a kind of method of coordinating multi-point of the embodiment of the present invention one can comprise:
210, will accept the downlink data dispatching of coordinated multipoint transmission service-user to the special channel of special subframe, the special channel of above-mentioned special subframe is as the dedicated channel of accepting the coordinated multipoint transmission service-user.
Under a kind of application scenarios, special subframe in radio frames comprises the special channel that can be used as the dedicated channel of accepting the coordinated multipoint transmission service-user, certainly special subframe also can also comprise one or more general control channels and the Physical Downlink Shared Channel (PDSCH that all kinds user can share, Physical downlink shared channel) etc., the present invention does not do restriction.
CoMP user's various downlink datas (for example, control information, business datum or out of Memory) can be dispatched to the special channel of special subframe, can certainly only CoMP user's control information be dispatched to the special channel of special subframe.
Further, if special subframe also comprises one or more general control channels that all kinds user can share, non-CoMP user's control information can also be dispatched to one or more general control channels of special subframe.If special subframe also comprises the PDSCH that all kinds user can share, can also be with CoMP user and/or non-CoMP user's the downlink data dispatching PDSCH to special subframe.
220, send above-mentioned special subframe.
Further, can also send common subframe, common subframe and special subframe can adopt multiple multiplex mode to send, for example, special subframe and common subframe adopt time-multiplexed mode to send or adopt that the mode of frequency division multiplexing sends etc., and the present invention does not do restriction.
Need to prove, such scheme specifically can specifically be implemented on the access network equipment of communication system, above-mentioned access network equipment can be other equipment with identity function in base station, base station controller, access point or communication system, and the present invention does not do restriction.
The special subframe that user terminal or miscellaneous equipment can the diversity reception network side send obtains the downlink data of the special channel carrying of special subframe, can obtain the diversity reception gain of the downlink data of special channel carrying simultaneously.
The technical scheme of various embodiments of the present invention for example can be applied to Long Term Evolution plan (LTE, Long Term Evolution) system, LTE-A system with and the plurality of communication systems such as upgrade-system, do not do restriction herein.
Can be found out by technique scheme, network side is treated CoMP user and non-CoMP user with a certain discrimination, utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's downlink data, be conducive to complete for the specific function of CoMP service and performance optimization etc.
For ease of understanding, the below coordinates multi-point as example take base station and the terminal a in Access Network, is described in more detail, and sees also Fig. 3, and a kind of method of coordinating multi-point of the embodiment of the present invention two can comprise:
301, the proportioning configuration of special subframe and common subframe in radio frames is determined in the base station.
A radio frames comprises a plurality of subframes, and under a kind of application scenarios, the base station of network side can be according to the load of self, the situations such as throughput of Cell Edge User, first determines the proportioning configuring condition of common subframe and special subframe in radio frames.
Under a kind of application scenarios, a radio frames comprises N subframe altogether, the proportioning configuring condition of the common subframe that the base station is determined and special subframe can be: n1: n2, wherein, n1 represents the number of common subframe in a radio frames, n2 represents the number of special subframe in a radio frames, N=n1+n2, N＞=n2.
The position distribution of various ways configuration special subframe in radio frames can be adopted in the base station.
Under a kind of application scenarios, the cycle configuration can be carried out to special subframe in the base station, so-called cycle configuration refers to, special subframe periodically occurs in radio frames, for instance, the base station can configure 1 special subframe every n common subframe, and the number of the common subframe at adjacent two special subframe institute intervals is identical.
Under another kind of application scenarios, configuration aperiodic can be carried out to special subframe in the base station, and configure and refer to so-called aperiodic, and special subframe is acyclic appearance in radio frames.For instance, the base station can be special subframe with the sub-frame configuration of the one or more specific numbers in radio frames (system's subframe numbers), and the number of the common subframe at adjacent two special subframe institute intervals is incomplete same.
Further, the base station can also utilize control signal or other message, with the proportioning configuring condition notification terminal of common subframe and special subframe in radio frames.
Under a kind of application scenarios, the base station can be carried at subframe configuration information in control signal, sends to terminal a, and above-mentioned subframe configuration information can be indicated the proportioning configuring condition of special subframe in radio frames.Terminal a is after receiving the above-mentioned control signal that carries subframe configuration information, can know in each subframe of radio frames, which subframe is special subframe, and which subframe is common subframe, and can configure to receive common subframe and special subframe according to the proportioning of knowing.
Under another kind of application scenarios, the proportioning configuring condition of common subframe and special subframe in radio frames also can be arranged with terminal in advance in the base station, and base station and terminal can be according to agreement proportioning configuring condition, the common subframe of sending and receiving and special subframes.
The base station can be controlled its access point and adopt multiple multiplex mode to send special subframe and common subframe, in this enforcement, adopts time division multiplexing mode transmission special subframe and common subframe as example take the base station, describes.
In the embodiment of the present invention, the structure of common subframe and special subframe is different.
The structure of common subframe can be as shown in Fig. 4-a, and common subframe comprises the Physical Downlink Control Channel that all kinds user can be public (PDCCH, Physical downlink control channel), Physical Downlink Shared Channel (PDSCH) etc.
Special subframe can comprise special channel (for convenience of description, the below is called for short channel A), certainly can also comprise that one or more general control channels that all kinds user can share (for convenience of description, the below is called for short channel B with one of them general control channel) and PDSCH etc., the present invention does not do restriction.
Under a kind of application scenarios, can be with the channel A of the special subframe dedicated channel as CoMP user, the channel A of special subframe can be exclusively used in carrying CoMP user's downlink data.The channel B of special subframe can be used as non-CoMP user's control channel, and the channel B of special subframe is mainly used in control information of carrying non-CoMP user etc.The PDSCH that special subframe can also comprise can be used for carrying CoMP user and/or non-CoMP user's business datum etc., to guarantee backwards compatibility.
In the embodiment of the present invention, the structural main distinction of common subframe and special subframe is: common subframe does not comprise channel A, and special subframe comprises channel A.
Under a kind of application scenarios, the structure of special subframe can be as shown in Fig. 4-b, Fig. 4-c, Fig. 4-d or Fig. 4-e, but is not limited in this.
As shown in Fig. 4-b, the frequency span of the channel A of special subframe can be whole frequency ranges of special subframe, namely the channel A of special subframe can take whole frequency ranges of special subframe.
As shown in Fig. 4-c, Fig. 4-d or Fig. 4-e, the frequency span of the channel A of special subframe can be the band segment of special subframe, namely the channel A of special subframe can take the band segment of special subframe.The channel A of special subframe and PDSCH coexist in special subframe with the form of frequency division multiplexing.
As shown in Fig. 4-b, Fig. 4-c or Fig. 4-e, the time span of the common channel A of special subframe can be the part-time of removing the shared time of channel B in special subframe, namely the channel A of special subframe can take the part-time of removing the shared time of channel B in special subframe.
As shown in Fig. 4-d, the time span of the channel A of special subframe can be also the All Time of removing the shared time of channel B in special subframe, and namely the channel A of special subframe can take the All Time of removing the shared time of channel B in special subframe.
Especially, as shown in Fig. 4-e, can also there be the free time section between the channel A of special subframe and the channel B of special subframe.
Be understandable that, common subframe and the configuration of special subframe proportioning in radio frames can not determined according to the load of self, the situations such as throughput of Cell Edge User in the base station yet, but be configured according to the mode of acquiescence, for example the subframe of radio frames all can be configured to special subframe, perhaps be defaulted as other configuration.
302, the base station is with the downlink data dispatching of the terminal a channel A to special subframe.
In Access Network, one or more access points can be administered in a base station, and access point is generally under the control of its home base station, transmits and receive data.
The work that coordinated multipoint transmission needs a plurality of access points to coordinate simultaneously usually, before terminal a was carried out coordinated multipoint transmission, one or more base stations can first through consultation, be chosen as the access point set that terminal a provides data transport service.
Under a kind of application scenarios, channel condition information (CSI between each access point that the base station can be concentrated according to terminal a and candidate's access point, Channel State Information), concentrate from candidate's access point and be chosen as the access point set that terminal a provides service.If a plurality of base stations are arranged simultaneously for terminal a provides service, can be chosen as the access point set that terminal a provides service by a plurality of base station negotiate that service is provided for terminal a.
If a plurality of base stations are arranged simultaneously for terminal a provides service, provide in the radio frames of a plurality of base stations of service the proportioning configuring condition of common subframe and special subframe identical for terminal a.
The allocation schedule of the transfer resource of terminal can be carried out in the base station, and transfer resource refers to the shared running time-frequency resource of the transmission of data.It is the position of terminal institute allocation of transmission resources that resource scheduling information is mainly used in indicating the base station, and the position of transfer resource typically refers to time location and/or frequency location.
Under a kind of application scenarios, if belong to a plurality of base stations for terminal a provides the access point set of data transport service simultaneously, a plurality of base stations of accessing the point set ownership can through consultation, be the identical transfer resource of business datum distribution of terminal a.
Can think, control information can comprise various control signals and out of Memory, and resource scheduling information can be carried in the base station in control signal, utilizes this control signal will be the position informing terminal of the transfer resource of terminal distribution.
Be the CoMP user terminal if terminal a is current, the base station can be deployed into the control information of terminal a the channel A of special subframe, the channel A that also user data or the out of Memory of terminal a can also be dispatched to special subframe, the present embodiment only is dispatched to the control information of terminal a special subframe take the base station channel A is example, describes.
Under a kind of application scenarios, the control signal that the base station also will carry the resource scheduling information of terminal a is dispatched to the channel A of special subframe.
Further, the base station can also be dispatched to the DRS (Dedicated Reference Signal) of channel A channel A, and the DRS (Dedicated Reference Signal) of channel A is conducive to the downlink data of terminal demodulation process channel A carrying.The transfer resource that the DRS (Dedicated Reference Signal) of channel A carrying takies can be evenly distributed in the shared transfer resource of channel A.
303, the base station is dispatched to non-CoMP user's control information the channel B of special subframe.
Under a kind of application scenarios, if special subframe also comprises channel B, the base station can also be dispatched to non-CoMP user's control information the channel B of special subframe, can realize utilizing two different channels to carry respectively CoMP user and non-CoMP subscriber control information.If special subframe also comprises PDSCH, the base station can also be dispatched to the business datum of terminal a and non-CoMP user's business datum etc. the PDSCH of special subframe.
Be understandable that, the sequencing that step 302 and step 303 are uninevitable, step 303 can be carried out prior to step 302, also can carry out simultaneously with step 302.
304, the base station sends special subframe.
Under a kind of application scenarios, the access point set that data transport service is provided for terminal a simultaneously can be controlled in the base station, sends simultaneously special subframe.Terminal a can the diversity reception special subframe the downlink data of channel A carrying, if (comprising: the control signal that carries resource scheduling information), terminal a can obtain the diversity reception gain of control signal to the various control signals of the channel A of special subframe carrying.
Terminal a can know that by the resolving resource schedule information base station is the position of its allocation of transmission resources, and terminal a can receive business datum at the indicated site diversity of its resource scheduling information, obtains the diversity reception gain of its business datum.
The control signal that other non-CoMP user terminal can carry by the channel B that receives special subframe obtains resource scheduling information etc., and can be at the indicated position receive data of its resource scheduling information.
Under a kind of application scenarios, the base station can send in the mode of time division multiplexing or frequency division multiplexing special subframe and common subframe, and common subframe can carry various users' downlink data.
Need to prove, the present embodiment is that access point set transmission special subframe and common subframe are controlled in the base station, terminal receives special subframe as receiving equipment and/or common subframe is that example describes.Can certainly be to consult voluntarily for same user provides the access point set of data transport service, send special subframe and common subframe, to complete specific function and the performance optimization for the CoMP service.
Special subframe and/or common subframe transmitting apparatus can also be trunking (Relay), and the receiving equipment of special subframe and/or common subframe can also be also trunking or miscellaneous equipment.
Can be found out by technique scheme, network side is treated CoMP user and non-CoMP user with a certain discrimination, utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's downlink data, be conducive to complete for the specific function of CoMP service and performance optimization etc.
Further, for providing a plurality of access points of service, same user terminal can send simultaneously the special construction subframe, and can utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's control information, the CoMP user terminal can be realized the control information of diversity reception CoMP user's dedicated channel carrying, has relatively improved the reception reliability of control information.
Embodiment three
Based on the technical scheme that provides in embodiment two, the embodiment of the present invention three also provides a kind of method of channel measurement.Coordinated multipoint transmission needs the co-ordination simultaneously of a plurality of access points, and network side may be arranged in a plurality of residential quarters for terminal a provides a plurality of access points of data transport service simultaneously.
The below think a plurality of access points that terminal a provides service for as shown in Figure 5 residential quarter 1, residential quarter 2 and residential quarter 3 in be example, be specifically described.
As shown in Figure 5, residential quarter 1, residential quarter 2 and residential quarter 3 are single residential quarter, virtual subdistrict 4 (Virtual Cell 4) comprises residential quarter 1, residential quarter 2 and residential quarter 3, certainly also can also comprise other residential quarter, this example only comprises simultaneously as residential quarter 1, residential quarter 2 and residential quarter 3 that terminal a provides service as example take Virtual Cell4, describes.
Residential quarter 1, residential quarter 2 and residential quarter 3 can be called coordinates the residential quarter, and virtual subdistrict 4 can be called the coordination set of cells.All residential quarters in virtual subdistrict 4 provide service for a user simultaneously.
When residential quarter 1, residential quarter 2 and residential quarter 3 provided service for terminal a simultaneously, for terminal a, can think its current residing in virtual subdistrict 4 provided service by the access point in virtual subdistrict 4 for it.
The control information of the common channel A transmitting terminal a that the access point of service can utilize special subframe simultaneously is provided for terminal a in residential quarter 1, residential quarter 2 and residential quarter 3, the control information that terminal a can above-mentioned each access point of diversity reception utilizes the channel A of special subframe to send simultaneously obtains control information diversity reception gain.
As shown in Fig. 4-b, Fig. 4-c, Fig. 4-d or Fig. 4-e, network side can utilize the channel A of special subframe to carry the DRS (Dedicated Reference Signal) of this channel, and the transfer resource that the DRS (Dedicated Reference Signal) of channel A carrying takies can be evenly distributed in the shared transfer resource of common channel A.
Under a kind of application scenarios, the channel A of terminal a diversity reception special subframe carries DRS (Dedicated Reference Signal), and utilizes the DRS (Dedicated Reference Signal) of above-mentioned diversity reception, the CoMP user's of the channel A carrying of demodulation process special subframe control information or other data.
Terminal resident behind certain residential quarter, regularly or under the triggering of measuring condition, measure the down channel quality of its persistent district and near residential quarter.
Terminal a can when measuring residential quarter 1, residential quarter 2 and residential quarter 3 down channel qualities, measure the down channel quality of virtual subdistrict 4.
Each residential quarter can be corresponding a kind of reference signal, if special subframe comprises channel B, the reference signal of the channel B of the special subframe that residential quarter 1, residential quarter 2 and residential quarter 3 send is corresponding residential quarter 1, residential quarter 2 and residential quarter 3 respectively.The access point of residential quarter 1, residential quarter 2 and residential quarter 3 all sends special subframe, the data of the channel B carrying of the special subframe that residential quarter 1, residential quarter 2 and residential quarter 3 send may be not identical, but the data of the channel A carrying of the special subframe that residential quarter 1, residential quarter 2 and residential quarter 3 send are identical, can the channel A carrying DRS (Dedicated Reference Signal) of special subframe is corresponding with virtual subdistrict 4.
Terminal a can measure according to existing mode the down channel quality of residential quarter 1, residential quarter 2 and residential quarter 3.
The mode that terminal a measures the down channel quality of virtual subdistrict 4 can be: the DRS (Dedicated Reference Signal) that terminal a carries by the channel A that receives special subframe, measure the channel quality of channel A, and the channel quality of the public channel A that will measure is as the down channel quality of virtual subdistrict 4.
Terminal can be passed through quality report, with the descending channel quality reporting of its residential quarter of measuring 1, residential quarter 2, residential quarter 3 and virtual subdistrict 4 to the base station.
The down channel quality of residential quarter 1, residential quarter 2, residential quarter 3 and virtual subdistrict 4 that the base station can comparison terminal a reports switches to down channel quality best residential quarter with terminal a.
After introducing virtual subdistrict, can improve the communication quality of user in cell switch process, realize taking over seamlessly of minizone.For instance, reside in residential quarter 1 if the user is current, but current for this user, the down channel quality of virtual subdistrict 4 is better than residential quarter 1, residential quarter 2 and residential quarter 3, and the base station can first switch to virtual subdistrict 4 with this user, over time, if the down channel quality of residential quarter 2 is better than residential quarter 1, residential quarter 3 and virtual subdistrict 4, the base station can switch to residential quarter 2 with this user again, utilizes virtual subdistrict 4 to switch transition, can realize taking over seamlessly between the residential quarter.
Further, for ease of better coordinating multi-point, can also distribute cell ID (Cell ID) for virtual subdistrict 4, make virtual subdistrict 4 and residential quarter 1, residential quarter 2 or residential quarter 3 have same meaning on the function of residential quarter.When terminal receives the CoMP service, can think that terminal is current to reside in by providing in the virtual subdistrict that a plurality of single residential quarter of service forms for this terminal simultaneously.
Take scene shown in Figure 5 as example, the cell ID of residential quarter 1, residential quarter 2, residential quarter 3 and residential quarter 4 can adopt the Unified number rule.Virtual subdistrict 4 is comprised of residential quarter 1, residential quarter 2 and residential quarter 3, can there be the mapping corresponding relation between residential quarter 4 signs and residential quarter 1 sign, residential quarter 2 signs, residential quarter 3 signs, makes terminal to judge residential quarter 4 according to residential quarter 4 signs and formed by residential quarter 1, residential quarter 2 and residential quarter 3.
For instance, suppose that each virtual subdistrict comprises m single residential quarter, cell ID is that m*n (m, n are positive integer) represents that this residential quarter is virtual subdistrict, the business identical residential quarter that is the Cell_ID/m gained is positioned at same virtual subdistrict, wherein remainder is 0 the virtual subdistrict that is, remainder is single residential quarter that is of other value.The mapping corresponding relation of virtual subdistrict sign and single cell ID is not limited to this, can certainly use the sign of m any one residential quarter in single residential quarter as the sign of virtual subdistrict.
The base station can will provide for it cell ID notification terminal of the virtual subdistrict of service by control signal or other message, terminal is according to the cell ID of virtual subdistrict, and the mapping corresponding relation of virtual subdistrict sign and single cell ID, know the single number of cells that forms this virtual subdistrict, and each single cell ID.
Be understandable that, the base station only needs to be the residential quarter ID notification terminal a of the virtual subdistrict of terminal a service, terminal a just can determine according to mapping relations the residential quarter ID of single residential quarter that this virtual subdistrict comprises, the base station does not need separately the residential quarter ID notification terminal a of single residential quarter of virtual subdistrict being comprised by descending control signaling, so just reduced the descending control signaling expense.
Can be found out by technique scheme, introduce virtual subdistrict and be conducive to the switching that realizes that the user is level and smooth in the minizone; For virtual subdistrict distributes Cell ID, make virtual subdistrict and single residential quarter have same meaning on the function of residential quarter; The Cell ID Unified number of virtual subdistrict and single residential quarter, owing to only having a cover cell ID (Cell ID), no matter be virtual subdistrict, or actual single residential quarter, all include in a cover coding rule, can simplify system, reduce the modification that to make owing to introducing the CoMP system, simple possible.
Further, due to virtual subdistrict ID with form between the residential quarter ID of single residential quarter of this virtual subdistrict and have mapping relations, terminal can be according to virtual subdistrict ID, knows the residential quarter ID of single residential quarter that this virtual subdistrict comprises by inference, can reduce the expense of descending control signaling.
Embodiment four
Accordingly, also provide a kind of access network equipment in the embodiment of the present invention, see also Fig. 6, a kind of access network equipment 600 of the embodiment of the present invention four can comprise: data dispatch module 610 and sending module 620.
Wherein, data dispatch module 610 is used for accepting the downlink data dispatching of coordinated multipoint transmission service-user to the special channel of special subframe, and the special channel of above-mentioned special subframe is as the dedicated channel of accepting the coordinated multipoint transmission service-user.
Under a kind of application scenarios, special subframe in radio frames comprises the special channel that can be used as the dedicated channel of accepting the coordinated multipoint transmission service-user, certainly can also comprise one or more general control channels that all kinds user can share and PDSCH etc., the present invention does not do restriction yet.
Further, if special subframe also comprises one or more general control channels and data channel that all kinds user can share, data dispatch module 610 can also be used for non-CoMP user's control information is dispatched to one or more general control channels of special subframe, with CoMP user and/or non-CoMP user's service data scheduling to the PDSCH of special subframe etc.
Sending module 630 is used for sending above-mentioned special subframe.
Under a kind of application scenarios, sending module 630 can also be used for sending common subframe, and common subframe and special subframe can adopt the mode of time division multiplexing or frequency division multiplexing to send.
Under a kind of application scenarios, data dispatch module 610 can comprise:
Control information scheduling sublayer module 611, the control information that is used for accepting the coordinated multipoint transmission service-user is dispatched to the special channel of special subframe.
Under a kind of application scenarios, data dispatch module 610 can comprise:
Reference signal scheduling sublayer module 612 is used for the DRS (Dedicated Reference Signal) of the special channel of special subframe is dispatched to the special channel of above-mentioned special subframe.
Under a kind of application scenarios, the DRS (Dedicated Reference Signal) of the special channel of special subframe carrying is corresponding with virtual subdistrict, and above-mentioned virtual subdistrict comprises simultaneously for same accepts all single residential quarters that the coordinated multipoint transmission service-user provides service.
The CoMP user terminal can the diversity reception special subframe special channel carrying DRS (Dedicated Reference Signal), and can utilize DRS (Dedicated Reference Signal) to measure the channel quality of special channel, with the channel quality of the special channel down channel quality as above-mentioned virtual subdistrict.
Above-mentioned CoMP user terminal or miscellaneous equipment can also according to existing mode, be measured the down channel quality of all single residential quarters of service is provided for it simultaneously, and utilize measurement report with above-mentioned measurement result report network side.
Need to prove, above-mentioned access network equipment can be other equipment with identity function in base station, base station controller, access point or communication system, and the present invention does not do restriction.
Be understandable that, the access network equipment of the present embodiment can be as the base station in embodiment two and enforcement three, the function of its each functional module can be according to the method specific implementation in embodiment two and enforcement three, its specific implementation process can referring to the associated description in embodiment two and enforcement three, not repeat them here.
Can be found out by technique scheme, network side is treated CoMP user and non-CoMP user with a certain discrimination, utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's downlink data, be conducive to complete for the specific function of CoMP service and performance optimization etc.
Further, for providing a plurality of access points of service, same user terminal can send simultaneously the special construction subframe, and can utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's control information, the CoMP user terminal can be realized the control information of diversity reception CoMP user's dedicated channel carrying, has relatively improved the reception reliability of control information; Introduce virtual subdistrict and be conducive to the switching that realizes that the user is level and smooth in the minizone.
Embodiment five
Accordingly, also provide a kind of terminal in the embodiment of the present invention, see also Fig. 7, a kind of terminal 700 of the embodiment of the present invention five can comprise:
The first receiver module 710, for the downlink data of the special channel carrying that receives special subframe, the special channel of above-mentioned special subframe is the dedicated channel of accepting the coordinated multipoint transmission service-user.
Under a kind of application scenarios, the first receiver module 710 can diversity reception provides the downlink data of the special channel carrying of the special subframe that the access point set of service sends simultaneously simultaneously for terminal 700, obtain the diversity reception gain of downlink data of the special channel carrying of special subframe.
Under a kind of application scenarios, special subframe in radio frames comprises the special channel that can be used as the dedicated channel of accepting the coordinated multipoint transmission service-user, certainly special subframe also can also comprise one or more general control channels that all kinds user can share and PDSCH etc., and the present invention does not do restriction.
Under a kind of application scenarios, network side can be with the special channel of the special subframe dedicated channel as CoMP user, and with CoMP user's the various downlink data dispatchings special channel to special subframe, can certainly only CoMP user's control information be dispatched to the special channel of special subframe.
Further, if special subframe also comprises one or more general control channels and data channel that all kinds user can share, network side can also be dispatched to non-CoMP user's control information one or more general control channels of special subframe, with CoMP user and/or non-CoMP user's service data scheduling to PDSCH of special subframe etc.
The first receiver module 710 can also be used for the business datum of the terminal 700 of reception PDSCH carrying.
Under a kind of application scenarios, network side can also be dispatched to the DRS (Dedicated Reference Signal) of special channel the special channel of above-mentioned special subframe.
Terminal 700 can also comprise:
The second receiver module 730 is for the DRS (Dedicated Reference Signal) of the special channel carrying that receives special subframe.
Under a kind of application scenarios, the second receiver module 730 can diversity reception provides the DRS (Dedicated Reference Signal) of the special channel carrying of the special subframe that the access point set of service sends simultaneously simultaneously for terminal 700, obtain the diversity reception gain of DRS (Dedicated Reference Signal) of the special channel carrying of special subframe.
Under a kind of application scenarios, the DRS (Dedicated Reference Signal) of the second receiver module 730 diversity receptions is corresponding with virtual subdistrict, and above-mentioned virtual subdistrict comprises simultaneously for same accepts all single residential quarters that the coordinated multipoint transmission service-user provides service.
Terminal 700 can also comprise:
The first measurement module 740 accepts for same the down channel quality that the coordinated multipoint transmission service-user provides all single residential quarters of service when being used for measuring above-mentioned virtual subdistrict and comprising.
The second measurement module 750 is used for utilizing the DRS (Dedicated Reference Signal) of the second receiver module 730 diversity receptions, measures the channel quality of the special channel of special subframe, and with the channel quality of the special channel the measured down channel quality as described virtual subdistrict.
Provide all single residential quarters of service and the down channel quality of above-mentioned virtual subdistrict for above-mentioned terminal when the base station of network side can comparison terminal reports, and above-mentioned terminal can be switched to down channel quality best residential quarter.
Be understandable that, the terminal 700 of the present embodiment can be as the terminal a in embodiment two and enforcement three, the function of its each functional module can be according to the method specific implementation in embodiment two and enforcement three, its specific implementation process can referring to the associated description in embodiment two and enforcement three, not repeat them here.
Can be found out by technique scheme, network side is treated CoMP user and non-CoMP user with a certain discrimination, utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's downlink data, be conducive to complete for the specific function of CoMP service and performance optimization etc.
Further, for providing a plurality of access points of service, same user terminal can send simultaneously the special construction subframe, and can utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's control information, the CoMP user terminal can be realized the control information of diversity reception CoMP user's dedicated channel carrying, has relatively improved the reception reliability of control information; Introduce virtual subdistrict and be conducive to the switching that realizes that the user is level and smooth in the minizone.
Accordingly, also provide a kind of communication system in the embodiment of the present invention, this a kind of communication system can comprise access network equipment as described in embodiment four.
Need to prove, for aforesaid each embodiment of the method, for simple description, therefore it all is expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not subjected to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, there is no the part that describes in detail in certain embodiment, can be referring to the associated description of other embodiment.Above-mentioned each embodiment adds that label is only convenient for citation, there is no dividing of quality.
In sum, in the technical scheme of the embodiment of the present invention, network side is treated CoMP user and non-CoMP user with a certain discrimination, utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's downlink data, be conducive to complete for the specific function of CoMP service and performance optimization etc.
Further, for providing a plurality of access points of service, same user terminal can send simultaneously the special construction subframe, and can utilize the dedicated channel of opening up for CoMP user in the ad hoc structure subframe to carry CoMP user's control information, the CoMP user terminal can be realized the control information of diversity reception CoMP user's dedicated channel carrying, has relatively improved the reception reliability of control information; Introduce virtual subdistrict and be conducive to the switching that realizes that the user is level and smooth in the minizone.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of above-described embodiment is to come the relevant hardware of instruction complete by program, this program can be stored in a computer-readable recording medium, and storage medium can comprise: word memory read, random asccess memory, disk or CD etc.
Above a kind of method and apparatus of coordinating multi-point that the embodiment of the present invention is provided is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (14)
1. a method of coordinating multi-point, is characterized in that, comprising:
To accept the special channel of the downlink data dispatching of coordinated multipoint transmission service-user to special subframe, the special channel of described special subframe is as the dedicated channel of accepting the coordinated multipoint transmission service-user;
Send described special subframe;
The described downlink data dispatching of coordinated multipoint transmission service-user of accepting comprises to the special channel of special subframe:
The control information of accepting the coordinated multipoint transmission service-user is dispatched to the special channel of special subframe.
2. method according to claim 1, is characterized in that, the special channel of described special subframe takies the partial-band of described special subframe.
3. method according to claim 1, is characterized in that, the special channel of described special subframe takies the part-time of described special subframe.
4. the described method of according to claim 1 to 3 any one, is characterized in that, sends described special subframe and also comprise before:
The DRS (Dedicated Reference Signal) of special channel is dispatched to the special channel of described special subframe.
5. method according to claim 4, it is characterized in that, described DRS (Dedicated Reference Signal) is corresponding with virtual subdistrict, described virtual subdistrict comprises simultaneously for same accepts all single residential quarters that the coordinated multipoint transmission service-user provides service, the cell ID of described virtual subdistrict with accept the coordinated multipoint transmission service-user for this simultaneously and provide the cell ID of all single residential quarters of service to have the mapping corresponding relation.
6. method according to claim 5, is characterized in that, described method also comprises:
The measurement report that the coordinated multipoint transmission service-user reports is accepted in reception, described measurement report carries simultaneously and accepts for this downlink channel quality information that coordinated multipoint transmission service-user provides all single residential quarters of service, and the downlink channel quality information of described virtual subdistrict;
Accept the coordinated multipoint transmission service-user for this more simultaneously all single residential quarters of service and the down channel quality of described virtual subdistrict are provided, this is accepted the coordinated multipoint transmission service-user switch to down channel quality best residential quarter.
7. the described method of according to claim 1 to 3 any one, is characterized in that, described method also comprises:
Send common subframe, described common subframe and described special subframe adopt the mode of time division multiplexing or frequency division multiplexing to send.
8. a method of coordinating multi-point, is characterized in that, comprising:
Receive the downlink data of the special channel carrying of special subframe, the special channel of described special subframe is as the dedicated channel of accepting the coordinated multipoint transmission service-user;
The downlink data of the special channel carrying of the described special subframe that demodulation process receives;
Receive the DRS (Dedicated Reference Signal) of the special channel carrying of described special subframe;
The downlink data of the special channel carrying of the described special subframe that described demodulation process receives comprises:
Utilize the DRS (Dedicated Reference Signal) that receives, the control information of the special channel carrying of the described special subframe of demodulation process diversity reception.
9. method according to claim 8, is characterized in that, described DRS (Dedicated Reference Signal) is corresponding with virtual subdistrict, and described virtual subdistrict comprises simultaneously for same accepts all single residential quarters that the coordinated multipoint transmission service provides service, and described method also comprises:
Accept for same the down channel quality that the coordinated multipoint transmission service-user provides all single residential quarters of service when measuring described virtual subdistrict and comprise;
Utilize described DRS (Dedicated Reference Signal), measure the channel quality of the special channel of special subframe, and with the channel quality of the special channel the measured down channel quality as described virtual subdistrict;
The down channel quality of all single residential quarters of service is provided for same user when reporting the down channel quality of described virtual subdistrict and described virtual subdistrict to comprise to network side.
10. an access network equipment, is characterized in that, comprising:
The data dispatch module is used for accepting the downlink data dispatching of coordinated multipoint transmission service-user to the special channel of special subframe, and the special channel of described special subframe is as the dedicated channel of accepting the coordinated multipoint transmission service-user;
Sending module is used for sending described special subframe;
The data dispatch module comprises:
Control information scheduling sublayer module, the control information that is used for accepting the coordinated multipoint transmission service-user is dispatched to the special channel of special subframe; And/or
Reference signal scheduling sublayer module is used for the DRS (Dedicated Reference Signal) of the special channel of special subframe is dispatched to the special channel of described special subframe.
11. access network equipment according to claim 10 is characterized in that, described DRS (Dedicated Reference Signal) is corresponding with virtual subdistrict, and described virtual subdistrict comprises all single residential quarters that service is provided for same user simultaneously, and described access network equipment also comprises:
Receiver module, be used for accepting the measurement report that the coordinated multipoint transmission service-user reports, described measurement report carries simultaneously and accepts for described the downlink channel quality information that the coordinated multipoint transmission service-user provides all single residential quarters of service, and the downlink channel quality information of described virtual subdistrict;
Handover module, provide all single residential quarters of service and the down channel quality of described virtual subdistrict for the described coordinated multipoint transmission service-user of accepting when being used for more described receiver module and receiving, the described coordinated multipoint transmission service-user of accepting is switched to down channel quality best residential quarter.
12. according to claim 10 to the 11 described access network equipments of any one, it is characterized in that,
Described sending module also is used for, and sends common subframe, and described common subframe and described special subframe adopt the mode of time division multiplexing or frequency division multiplexing to send.
13. a terminal is characterized in that, comprising:
The first receiver module, for the downlink data of the special channel carrying that receives special subframe, the special channel of described special subframe is the dedicated channel of accepting the coordinated multipoint transmission service-user;
The demodulation process module is used for the downlink data of the special channel carrying of the described special subframe that demodulation process the first receiver module receives;
Described terminal also comprises the second receiver module, for the DRS (Dedicated Reference Signal) of the special channel carrying that receives described special subframe;
Described demodulation process module specifically is used for, the DRS (Dedicated Reference Signal) that utilizes the second receiver module to receive, the control information of the special channel carrying of the described special subframe of demodulation process diversity reception.
14. terminal according to claim 13, it is characterized in that, the DRS (Dedicated Reference Signal) of the special channel of described special subframe carrying is corresponding with virtual subdistrict, and described virtual subdistrict comprises simultaneously for same accepts all single residential quarters that the coordinated multipoint transmission service-user provides service
Described terminal also comprises:
The first measurement module accepts for same the down channel quality that the coordinated multipoint transmission service-user provides all single residential quarters of service when being used for measuring described virtual subdistrict and comprising;
The second measurement module is used for the DRS (Dedicated Reference Signal) utilize the second receiver module to receive, measures the channel quality of the special channel of special subframe, and with the channel quality of the special channel the measured down channel quality as described virtual subdistrict;
Reporting module is used for reporting to network side the down channel quality of the virtual subdistrict that the second measurement module measures, and the described virtual subdistrict measured of the first measurement module provides the down channel quality of all single residential quarters of service when comprising for same user.
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| PCT/CN2009/071902 WO2010133034A1 (en) | 2009-05-21 | 2009-05-21 | Method for coordinated multi point communication and device therefor |
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| CN104079386B (en) * | 2013-03-29 | 2018-11-16 | 中兴通讯股份有限公司 | The method, apparatus and terminal that non-periodic channel quality information reports |
| CN104243087B (en) * | 2013-06-13 | 2019-02-12 | 中兴通讯股份有限公司 | A kind of sending method of data and control information, method of reseptance, base station and terminal |
| US10462836B2 (en) | 2014-08-06 | 2019-10-29 | Lg Electronics Inc. | Method and apparatus for supporting amorphous cell in wireless communication system |
| CN105933937A (en) * | 2016-04-21 | 2016-09-07 | 中国科学院计算技术研究所 | Method for reducing wireless communication frame loss and equipment thereof |
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| CN101373999A (en) * | 2008-08-12 | 2009-02-25 | 中兴通讯股份有限公司 | Pilot transmission method for down collaboration multi-point transmission |
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