CN103312388A - Method and system for feeding back channel state information in cooperative multipoint communication - Google Patents
Method and system for feeding back channel state information in cooperative multipoint communication Download PDFInfo
- Publication number
- CN103312388A CN103312388A CN201310251874XA CN201310251874A CN103312388A CN 103312388 A CN103312388 A CN 103312388A CN 201310251874X A CN201310251874X A CN 201310251874XA CN 201310251874 A CN201310251874 A CN 201310251874A CN 103312388 A CN103312388 A CN 103312388A
- Authority
- CN
- China
- Prior art keywords
- information
- feedback
- channel status
- transmission point
- transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a method and a system for feeding back channel state information in cooperative multipoint communication. Firstly, user equipment selects a transmission point as a reference transmission point from all transmission points to be fed back, and feeds back channel state reference information to the reference transmission point. Secondly, the user equipment feeds back the difference between the channel state reference information and channel state reference information of the reference transmission point to each of the other transmission points to be fed back. By the method, feedback quantity is greatly decreased, so that uplink expenses can be reduced.
Description
Technical field
The present invention relates to coordinate multipoint (CoMP, the Coordinated Multi-point) communication of radio communication, relate in particular to the feedback mechanism of channel condition information (CSI, Channel State Information)
Background technology
In order to satisfy the technical indicator of next generation mobile communication system IMT-Advanced (International Mobile Telecommunications-Advanced), 3GPP (The3
RdGeneration Partner Project, third generation partner program) LTE-Advanced (Long Term Evolution-Advanced, the Long Term Evolution of future generation) scheme of submitting to has proposed the requirement higher than LTE system to residential quarter average throughput especially Cell Edge User throughput.Yet, OFDM access (the Orthogonal Frequency Division Multiple Access that LTE and LTE-Advanced adopt, OFDMA) although scheme has effectively been eliminated in the residential quarter by the subcarrier of quadrature disturbs, but can't alleviate the presence of intercell interference that edge customer is subject to, this is so that presence of intercell interference becomes the bottleneck that the system for restricting capacity promotes.For this reason, introduce coordinate multipoint (Coordinated Multi-Point, CoMP) transmission technology in the LTE-Advanced system and solved presence of intercell interference.
It is in the nature distributing antenna system the CoMP system.Under the CoMP system, a subscriber equipment (UE, User Equipment) can be by a plurality of access point (AP, Access Points) services that are in diverse geographic location.In this case, UE just need to carry out channel condition information (CSI) feedback to a plurality of AP.
In LTE Release11, for the CSI feedback of CoMP, reach a basic common recognition exactly at present: adopt at least each channel state information reference signals feedback (per-CSI-RS-resource feedback) to feed back.That is to say that UE need to feed back for each channel status reference information (CSI-RS, Channel State Information-Reference Signal) of each different transfer point (TP, Transmission Point).CSI-RS information specifically comprises: channel quality indication (CQI, Channel Quality Indicator), order indication (RI, Rank Indicator), pre-coding matrix indication (PMI, and phase place indication information (PhI, Phase Indicator) Precoding Matrix Indicator).Therefore when transfer point is more, in the situation that namely UE need to feed back a plurality of TP, its up expense is very large.
Summary of the invention
Therefore, the object of the invention is to overcome the large defective of above-mentioned uplink feedback expense, propose a kind of mechanism of CoMP CSI feedback of difference.
The objective of the invention is to be achieved through the following technical solutions:
On the one hand, the invention provides a kind of feedback method of the channel condition information for coordinate multipoint communication, described method comprises:
The step 1) subscriber equipment selects a transfer point as the reference transfer point from all transfer points to be feedback;
Step 2) subscriber equipment is to this its channel status reference information of reference transmission point feedback;
Each in other transfer points to be feedback of step 3) subscriber equipment is fed back the difference of the channel status reference information of its channel status reference information and reference transmission point.
In the said method, described step 1) can comprise that also the reference transmission point notifies described selection to other transfer points.
In the said method, also can comprise in described other transfer points each: the channel status reference information that obtains this reference transmission point from the reference transmission point; And
Obtain the channel status reference information of this transfer point according to the channel status reference information of reference transmission point and received difference.
In the said method, described channel status reference information comprises channel quality indication, order indication, pre-coding matrix indication and phase place indication information.
On the other hand, the invention provides a kind of reponse system of the channel condition information for coordinate multipoint communication, described system comprises subscriber equipment and transfer point to be feedback, wherein, described subscriber equipment is configured to: select a transfer point as the reference transfer point from all transfer points to be feedback; To this its channel status reference information of reference transmission point feedback; In other transfer points to be feedback each is fed back the difference of the channel status reference information of its channel status reference information and reference transmission point.
In the said system, described reference transmission point also can be configured to notify described selection to other transfer points.
In the said system, each in described other transfer points can be configured to: the channel status reference information that obtains this reference transmission point from the reference transmission point; And the channel status reference information that obtains this transfer point according to the channel status reference information of reference transmission point and received difference.
In the said system, described channel status reference information comprises channel quality indication, order indication, pre-coding matrix indication and phase place indication information.
Compared with prior art, the invention has the advantages that:
When feedback, UE is at first selected to feed back to this with reference to TP with reference to TP and with reference to the CSI-RS information of TP, feed back its CSI-RS information and this difference value with reference to the CSI-RS information of TP then for successively other TP, so that feedback quantity can greatly reduce, up expense can greatly reduce thus.
Description of drawings
Embodiments of the present invention is further illustrated referring to accompanying drawing, wherein:
Fig. 1 is the mode schematic diagram according to the CoMP CSI feedback of the difference of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage are clearer, and the present invention is described in more detail by specific embodiment below in conjunction with accompanying drawing.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
In an embodiment of the present invention, the method of the CoMP CSI feedback of the difference that is used for coordinate multipoint communication is provided, at first some TP are elected as with reference to TP, then UE feeds back to this TP with the CSI-RS information of this TP, feeds back its CSI-RS information and this difference value with reference to the CSI-RS information of TP then for successively other TP.
Fig. 1 has provided according to the mode of the CoMP CSI feedback of the difference of the embodiment of the invention and has illustrated.With reference to figure 1, the method for the CoMP CSI of this difference feedback may further comprise the steps:
Step 1, UE end select a TP as reference TP from all TP of needs feedback, and TP1 as shown in Figure 1 is chosen as with reference to TP (Reference TP).Owing to being to communicate by letter mutually between the base station, in case selected with reference to TP, remaining TP will know that this TP is with reference to TP.For example, by the communication between the transfer point, be chosen as with reference to TP to all the other transfer point notice TP1.Again for example, can the self identification symbol be sent to remaining TP by reference TP, to notify this selection to all the other base stations.
Step 2, this UE to this with reference to TP(for example TP1) feeds back this with reference to the CSI-RS information of TP.For example, the UE among Fig. 1 (is designated as CSI-RS-1 to reference TP1 feedback CSI-RS information among Fig. 1.After the CSI-RS information of receiving from the UE feedback, can notify the CSI-RS information of receiving with reference to TP to all the other transfer points.The request from all the other transfer points of perhaps also can waiting for just sends to all the other transfer points with the CSI-RS information of receiving.
Step 3, this UE selects next TP, will feed back to the CSI-RS information of this TP and do a difference with reference to the CSI-RS information of TP, and this difference value is fed back to this TP.
For example, as shown in Figure 1, select next TP, TP2 for example, to feed back to the CSI-RS information (being designated as CSI-RS-2 among Fig. 1) of this TP2 and do a difference with reference to the CSI-RS information of TP, and this difference value fed back to this TP2 feedback, this information through difference is designated as CSI-RS-1-CSI-RS-2 in Fig. 1.
As indicated above, CSI-RS information specifically comprises: channel quality indicator (CQI), order indication RI, pre-coding matrix indication PMI, and phase place indication information PhI.All there is CQI, RI, the feedback form of PMI and PhI at UE end and all base station ends (referring to all TP that CoMP concentrates here).Take CQI as example, as shown in table 1 is the CQI feedback form of 4 bits:
Table 1
And the feedback form of all base station ends and UE end is identical.Therefore when the CRI-RS information of the concrete feedback of UE, only need that corresponding sequence number gets final product in the feedback respective table, such as 0,1,2 ...Give an example, if UE needs the CQI of feedback to reference TP (being assumed to be TP1), RI, PMI, the information difference of PhI: its binary system of 10(is 1010), its binary system of 14(is 1110), its binary system of 7(is 111), its binary system of 3(is 11); Its corresponding feedback quantity is 4bit, 4bit, 3bit, 2bit, altogether the feedback quantity of 13bit.It is respectively that its binary system of 8(is 1000 that this UE needs feedack to TP2), its binary system of 14(is 1110), its binary system of 9(is 1001), its binary system of 4(is 101); Its corresponding feedback quantity is 4bit, 4bit, 4bit, 3bit, altogether the feedback quantity of 15bit.In step 3, UE needs only the corresponding difference of feedback when feeding back to TP2, that is :-2,0, and 2,1.Because concentrate at same CoMP, for example RI information is normally identical, therefore the corresponding difference corresponding to RI is generally 0, and feeds back 0, only needs the feedback quantity of 1bit, thereby can reduce the expense of feedback.For example, in step 3, UE is to TP2 feedback 010(representative-2, and wherein, first is that sign bit is to distinguish " just " or " bearing "; For example, 0 expression " bear ", 1 represent " just " however be the binary one 0 of 2 correspondences), 0,110(represents 2), 11(represents 1), like this, UE can be reduced to 9bit from original 15bit to the feedback quantity of TP2.
As indicated above, all the other transfer points can be obtained the CSI-RS information that this is received with reference to TP from reference TP.Like this, all the other transfer points (for example TP2) are receiving behind differentiated CSI-RS feedback information, and then the CSI-RS information that can receive with reference TP add and subtract the CSI-RS information that reduction is actual as a reference automatically accordingly according to difference value.
Step 4, repeating step 3 is until all feedbacks finish
In yet another embodiment of the present invention, a kind of reponse system of the channel condition information for coordinate multipoint communication also is provided, this system comprises subscriber equipment and transfer point to be feedback, wherein, described subscriber equipment is configured to carry out in coordinate multipoint communication according to method mentioned above the feedback of CSI-RS information.Described reference transmission point also can be configured to notify described selection to other transfer points.In described other transfer points each can be configured to: the channel status reference information that obtains this reference transmission point from the reference transmission point; And the channel status reference information that obtains this transfer point according to the channel status reference information of reference transmission point and received difference.
Although the present invention is described by preferred embodiment, yet the present invention is not limited to embodiment as described herein, also comprises without departing from the present invention various changes and the variation done.
Claims (8)
1. feedback method that is used for the channel condition information of coordinate multipoint communication, the method comprises:
The step 1) subscriber equipment selects a transfer point as the reference transfer point from all transfer points to be feedback;
Step 2) subscriber equipment is to this its channel status reference information of reference transmission point feedback;
Each in other transfer points to be feedback of step 3) subscriber equipment is fed back the difference of the channel status reference information of its channel status reference information and reference transmission point.
2. method according to claim 1, described step 1) comprise that also the reference transmission point notifies described selection to other transfer points.
3. method according to claim 2 also comprises in described other transfer points each: the channel status reference information that obtains this reference transmission point from the reference transmission point; And
Obtain the channel status reference information of this transfer point according to the channel status reference information of reference transmission point and received difference.
4. each described method according to claim 1-3, described channel status reference information comprise channel quality indication, order indication, pre-coding matrix indication and phase place indication information.
5. reponse system that is used for the channel condition information of coordinate multipoint communication, this system comprises subscriber equipment and transfer point to be feedback, wherein, described subscriber equipment is configured to:
From all transfer points to be feedback, select a transfer point as the reference transfer point;
To this its channel status reference information of reference transmission point feedback;
In other transfer points to be feedback each is fed back the difference of the channel status reference information of its channel status reference information and reference transmission point.
6. system according to claim 5, described reference transmission point also is configured to notify described selection to other transfer points.
7. system according to claim 6, each in described other transfer points is configured to:
Obtain the channel status reference information of this reference transmission point from the reference transmission point; And
Obtain the channel status reference information of this transfer point according to the channel status reference information of reference transmission point and received difference.
8. each described method according to claim 5-7, described channel status reference information comprise channel quality indication, order indication, pre-coding matrix indication and phase place indication information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310251874XA CN103312388A (en) | 2013-06-24 | 2013-06-24 | Method and system for feeding back channel state information in cooperative multipoint communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310251874XA CN103312388A (en) | 2013-06-24 | 2013-06-24 | Method and system for feeding back channel state information in cooperative multipoint communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103312388A true CN103312388A (en) | 2013-09-18 |
Family
ID=49137220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310251874XA Pending CN103312388A (en) | 2013-06-24 | 2013-06-24 | Method and system for feeding back channel state information in cooperative multipoint communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103312388A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016033789A1 (en) * | 2014-09-05 | 2016-03-10 | 华为技术有限公司 | Data transmission method, system and device |
| CN106465429A (en) * | 2014-06-03 | 2017-02-22 | 高通股份有限公司 | Protected CET transmission and reception |
| CN106559165A (en) * | 2015-09-24 | 2017-04-05 | 华为技术有限公司 | A kind of method and apparatus of feeding back channel state information |
| WO2020020321A1 (en) * | 2018-07-27 | 2020-01-30 | 中兴通讯股份有限公司 | Channel state processing method and apparatus, system, terminal, base station, and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011020062A2 (en) * | 2009-08-14 | 2011-02-17 | Research In Motion Limited | Frame structure and control signaling for downlink coordinated multi-point (comp) transmission |
| CN102291228A (en) * | 2011-08-16 | 2011-12-21 | 电信科学技术研究院 | Channel state information feedback and receiving methods and equipment |
| WO2013062386A1 (en) * | 2011-10-27 | 2013-05-02 | 엘지전자 주식회사 | Method and apparatus for feeding back aggregated channel state information in cooperative multipoint communication system |
| CN103096368A (en) * | 2011-11-04 | 2013-05-08 | 中国移动通信集团公司 | Channel state information (CSI) measuring trigger method, terminal, base station and system |
| CN103095401A (en) * | 2011-11-07 | 2013-05-08 | 上海贝尔股份有限公司 | Method and device for signal channel state information feedback |
-
2013
- 2013-06-24 CN CN201310251874XA patent/CN103312388A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011020062A2 (en) * | 2009-08-14 | 2011-02-17 | Research In Motion Limited | Frame structure and control signaling for downlink coordinated multi-point (comp) transmission |
| WO2011020062A3 (en) * | 2009-08-14 | 2011-09-09 | Research In Motion Limited | Frame structure and control signaling for downlink coordinated multi-point (comp) transmission |
| CN102291228A (en) * | 2011-08-16 | 2011-12-21 | 电信科学技术研究院 | Channel state information feedback and receiving methods and equipment |
| WO2013062386A1 (en) * | 2011-10-27 | 2013-05-02 | 엘지전자 주식회사 | Method and apparatus for feeding back aggregated channel state information in cooperative multipoint communication system |
| CN103096368A (en) * | 2011-11-04 | 2013-05-08 | 中国移动通信集团公司 | Channel state information (CSI) measuring trigger method, terminal, base station and system |
| CN103095401A (en) * | 2011-11-07 | 2013-05-08 | 上海贝尔股份有限公司 | Method and device for signal channel state information feedback |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106465429A (en) * | 2014-06-03 | 2017-02-22 | 高通股份有限公司 | Protected CET transmission and reception |
| CN106465429B (en) * | 2014-06-03 | 2020-02-18 | 高通股份有限公司 | Wireless communication method and device |
| US10701729B2 (en) | 2014-06-03 | 2020-06-30 | Qualcomm Incorporated | Protected CET transmission and reception |
| WO2016033789A1 (en) * | 2014-09-05 | 2016-03-10 | 华为技术有限公司 | Data transmission method, system and device |
| US10432285B2 (en) | 2014-09-05 | 2019-10-01 | Huawei Technologies Co., Ltd. | Data transmission method, system, and device |
| CN106559165A (en) * | 2015-09-24 | 2017-04-05 | 华为技术有限公司 | A kind of method and apparatus of feeding back channel state information |
| CN106559165B (en) * | 2015-09-24 | 2020-11-06 | 华为技术有限公司 | Method and equipment for feeding back channel state information |
| WO2020020321A1 (en) * | 2018-07-27 | 2020-01-30 | 中兴通讯股份有限公司 | Channel state processing method and apparatus, system, terminal, base station, and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104350693B (en) | It is used for the channel estimation methods and device of collaboration communication in cell mobile communication systems | |
| CN102438312B (en) | Mobile communication system and CSI-RS (channel state indication reference signal) configuring method thereof | |
| CN104429016B (en) | The feedback method and device that cooperation for multiple cells is transmitted | |
| US9320042B2 (en) | Wireless communication system with multiple base stations cooperating to transmit data | |
| US10511411B2 (en) | Method for configuring channel state information reporting band and communications apparatus | |
| CN107005293A (en) | For part precoding channel state information reference signals and information feedback downlink signaling method and apparatus | |
| CN103053122A (en) | Method and apparatus for transmitting and receiving reference signal in wireless communication system | |
| JP2015529056A (en) | Method and apparatus for controlling RI reporting | |
| CN103580819A (en) | Channel state information feedback allocation method and device and measuring and feedback method and device | |
| CN104993911A (en) | Method for processing channel state information reference signal, user equipment and base station | |
| CN104040907A (en) | Method and apparatus for transmitting and receiving feedback information in a mobile communication system | |
| CN103812545A (en) | Feedback method and device for channel state information | |
| CN104221301A (en) | Method and apparatus for transmitting and receiving a feedback signal in a mobile communication system | |
| US9236995B2 (en) | Method and device for sending aggregated CQI | |
| US9083490B2 (en) | Apparatus and method for mitigating inter-cell interference in multiple antenna system | |
| CN109155693A (en) | Low complex degree multi-configuration CSI report | |
| CN101931442A (en) | Method and device for information indication | |
| CN102315910A (en) | Sending method of channel state information and user equipment | |
| CN103858367A (en) | Method and apparatus for generating feedback in a communication system | |
| US10194455B2 (en) | Method for feeding back channel quality indicator, and method and apparatus for sending resource scheduling information | |
| CN103973394A (en) | Informing method and device for CRS patterns and determining method and device for CRS patterns | |
| CN102938934A (en) | Resource allocation method and device of control channel information | |
| CN103312388A (en) | Method and system for feeding back channel state information in cooperative multipoint communication | |
| CN102811456A (en) | Information reporting and processing method, device and system | |
| WO2016045527A1 (en) | Method and device for 3d mimo communication in ue and base station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130918 |