CN104811267A - Coordinated multiple point (CoMP) transmission method - Google Patents
Coordinated multiple point (CoMP) transmission method Download PDFInfo
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- CN104811267A CN104811267A CN201410043901.9A CN201410043901A CN104811267A CN 104811267 A CN104811267 A CN 104811267A CN 201410043901 A CN201410043901 A CN 201410043901A CN 104811267 A CN104811267 A CN 104811267A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
- H04L1/0004—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes applied to control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to a CoMP transmission method. The CoMP transmission method in one embodiment comprises that a base station indicates a CSI process to user equipment via RRC signaling, the CSI process comprises a space mode indication, and correspondingly, CSI feedback of the user equipment comprises at least one group of indication corresponding to the space mode indication. The scheme facilitates formation of coordinated wave beam under the non-ideal backhaul network condition.
Description
Technical field
The present invention relates generally to mobile communication technology, more specifically, relates to collaborative multicast communication.
Background technology
At such as Long Term Evolution project (Long Term Evolution, LTE) in Modern Mobile Communications Systems, base station is down link (downlink, and up link (uplink DL), UL) used transformat, transmission block size, modulation and coding scheme, multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) transmission mode etc. are determined.In order to such determination can be carried out for down link, base station needs from subscriber equipment (UserEquipment, the information of the performance about present downlink channel UE), is commonly called channel condition information (Channel State Information, CSI).
Frequency division multiplexing (FDD) down link is worked in coordination with multiple spot (Coordinated Multiple Point, CoMP) transmission technology and is had the potentiality improved cell edge user throughput or even improve community average throughput.In CoMP transmission, there is multiple transmission mode, such as joint transmission (joint transmission, JT), dynamic point selects (dynamic pointselection, DPS), dynamic point is mourned in silence (dynamic point blanking, and coordinated scheduling DPB)/coordinates beam is shaped (coordinated scheduling/coordinated beamforming, CS/CB).
Summary of the invention
CS/CB scheme is coordinated the emitting side scheduling/precoding being applied to downlink transmission between transfer point (transmission point, TP), so that the interference between the overlay area of reducing different transfer point.The support that the scene of prior art to different beams provides is not enough.
One object of the present invention is to provide the enhancing mechanism of the CSI feedback for CS/CB under imperfect backhaul network condition and scheduling.Other objects of the present invention also comprise the mechanism proposing to control for many level power and the mechanism adding power control for CS/CB.
An embodiment provides a kind of method being suitable for collaborative multicast communication, comprising: base station via radio resource control layer (RRC) signaling to subscriber equipment indicating channel state information formula (CSI process); Wherein said channel condition information pattern comprises the instruction of spatial model and/or power mode.
In one embodiment, described channel condition information formula comprises the instruction of spatial model, and it is part or all of that the instruction of described spatial model comprises in the following: 2D wave beam or the instruction of 3D wave beam; For the broadband of 2D or 3D channel or the instruction of subband precoder; For 2D or 3D channel in short-term or long time information feedback.Correspondingly, the information feedback of subscriber equipment comprises corresponding with the instruction of described spatial model at least one group and indicates.
In another embodiment, described channel condition information formula comprises the instruction of power mode, and it is part or all of that the instruction of described power mode comprises in the following: for broadband or the sub-band channel status information feedback of 2D or 3D channel; For 2D or 3D channel in short-term or long time information feedback.Correspondingly, the information feedback of subscriber equipment comprises corresponding with the instruction of described power mode at least one group and indicates.
In yet another embodiment, described channel condition information formula comprises the instruction of space and power mode.Correspondingly, the information feedback of subscriber equipment comprises corresponding with the instruction of described space and power mode at least one group and indicates.
Each group instruction in such scheme comprises order instruction and/or channel quality indicates and/or precoding index.
Foregoing has outlined technical characteristic of the present invention and advantage to be easier to understand to make the detailed description of below the present invention.Other features and advantages of the present invention will be described below, and which form the theme of claim of the present invention.Those skilled in the art will be understood that disclosed concept and embodiment easily can be used as revising or designing other the basis for the structure or flow process that realize the object identical with the present invention.Those skilled in the art should also be understood that such equivalent constructions does not deviate from the spirit and scope of appended claims.
Accompanying drawing explanation
By reference to the accompanying drawings, will be easier to understand about the detailed description of the preferred embodiments of the present invention below.The present invention is explained by way of example, is not limited to accompanying drawing, and Reference numeral similar in accompanying drawing indicates similar element.
Figure 1A and Figure 1B shows the scene that coordinated scheduling/coordinates beam is shaped;
Fig. 2 shows the schematic diagram that signaling between the base station and the user equipment according to an embodiment of the invention is transmitted;
Fig. 3 shows the schematic diagram that signaling between the base station and the user equipment is according to another embodiment of the invention transmitted;
Fig. 4 shows the schematic diagram that signaling between the base station and the user equipment is according to still another embodiment of the invention transmitted.
Embodiment
The detailed description of accompanying drawing is intended to the explanation as currently preferred embodiment of the present invention, and is not intended to represent that the present invention can be achieved only has form.It should be understood that identical or equivalent function can complete by being intended to the different embodiments be contained within the spirit and scope of the present invention.
Those skilled in the art will be understood that means described herein and function can use the software function in conjunction with programmable microprocessor and all-purpose computer to realize, and/or use ASIC(Application Specific Integrated Circuit) (ASIC) to realize.It is also to be understood that, although the present invention is mainly described with the form of device in method, the present invention also can be embodied as computer program and comprise computer processor and be connected to the system of memory of processor, and wherein memory one or more programs that can complete the function disclosed herein are encoded.
Those skilled in the art will be understood that there is different technical terms base station in different consensus standards.Such as, base station is called as the Node B (evolved NodeB, eNB) of Node B (Node B) or evolution in LTE system or lte-a system.Base station alleged in the present invention is such as but not limited to the eNB in lte-a system.The method provided in the present invention and device are applicable to such as but not limited to LTE system.
Figure 1A and Figure 1B shows the scene that coordinated scheduling/coordinates beam is shaped.Communication network shown in figure comprises: be distributed in two base station/cell 111 and 112 between three buildings 131 to 133, and four subscriber equipmenies 121 to 124.Subscriber equipment 121 and 122 is served by base station/cell 111, and subscriber equipment 123 and 124 is served by base station/cell 112.In single cell transmission pattern (namely, non-CoMP transmission pattern) in, the subscriber equipment 121 of being served by base station 111 may stand stronger (between the community) interference from base station 112, and the subscriber equipment 123 of being served by base station 112 may stand the comparatively strong jamming from base station 111.In order to alleviate the comparatively strong jamming between this community, when base station 111 sends data to subscriber equipment 121, expect that scheduling user's set 123 is avoided in base station 112.Similarly, when base station 112 sends data to subscriber equipment 123, expect that scheduling user's set 121 is avoided in base station 111.
Fig. 2 shows the schematic diagram that signaling between the base station and the user equipment according to an embodiment of the invention is transmitted.As shown in the figure, base station 111 indicates CSI process via RRC signaling 210 to subscriber equipment 121, and this CSIprocess comprises spatial model instruction.Correspondingly, the information feedback 220 of subscriber equipment 121 comprises corresponding with the instruction of described spatial model at least one group and indicates.
In semi-static CS/CB, semi-static space pattern (pattern) expection in space-time-frequency (STF) territory uses the longer cycle by community, such as, for being greater than several seconds and several hours.Therefore zero energy channel state information reference signals (ZP CSI-RS) resource distribution transmission Physical Downlink Shared Channel (PDSCH) in neighbor cell is enough to be used in the interferometry in this situation.
Due to the configuration of spatial limitation, available signal poker in data transmitting may configure with according to measuring, such as non-zero power channel state information reference signals (NZP CSI-RS configures), with corresponding pre-coding matrix index (PMI) feed back to record signal power different.Therefore, suboptimum PMI recommends for performance improvement is in the case preferred.It should be noted that in the case of 3d, PMI feedback packet is containing the information of the inclination angle instruction recommended.The 2D antenna configuration of base station is mainly conceived to 360 ° of wave cover without dead angle, and in addition the 3D antenna configuration of base station also will consider wave cover with angle.
Except existing configuration, a CSI process can indicate with spatial model and be associated.Order corresponding to this CSI process indicates (RI) to report can comprise one or more RI.RI reports that order can indicate consistent with spatial model.Spatial model instruction can comprise all or part of of following information: 2D wave beam or the instruction of 3D wave beam; For broadband or the instruction of subband precoder of 2D or 3D channel; For 2D or 3D channel in short-term or long time CSI feedback.
Such as, a limitations set comprises the instruction of the PMI/RI through mourning in silence in special time-frequency resource, such as codebookSubSetRestriction adds T/F instruction, and this instruction is such as but not limited to Physical Resource Block (PRB) rank, Physical Resource Block group (PRBG) rank, subband rank, broadband rank, other instruction of sub-frame level.It should be noted that codebookSubSetRestriction may comprise the information of inclination angle restriction.Each limitations set has independently RI report, unless RI makes other instruction with reference to process.
Correspondingly, subscriber equipment can be configured to the multiple PMI/CQI/RI corresponding to same community for the report of different wave beam silent modes.According to the PMI/CQI/RI of these multiple reports, base station can be selected to correspond to for the current beam silent mode of dispatching user facility and the suitable PMI/CQI/RI of time-frequency resources.
Such scheme is of value to the enforcement that the coordinates beam under imperfect backhaul (backhaul) network condition is shaped.
Fig. 3 shows the schematic diagram that signaling between the base station and the user equipment is according to another embodiment of the invention transmitted.As shown in the figure, base station 112 indicates CSI process via RRC signaling 310 to subscriber equipment 124, and this CSIprocess comprises power mode instruction.Correspondingly, the information feedback 320 of subscriber equipment 124 comprises corresponding with the instruction of described power mode at least one group and indicates.
In multiple power levels controls, transmitting power (or even reducing to zero energy) can be reduced for inter-cell interference mitigation in interfered cell in some time-frequency resources, and in At All Other Times-frequency resource, use high transmit power to ensure the enough service quality to certain customers' equipment.In LTE-A is the 11st edition, a CSI process only has a power control factor Pc for the CSI feedback on whole broadband.Therefore, a CSI process configuration is not enough to the channel information measuring a community for subscriber equipment.In order to head it off, configure user equipment can be carried out with multiple CSIprocess with different Pc setting.But this will bring more feedback overhead.
Except the existing configuration in standard, a CSI process can be associated with indicating in a frequency domain the enhancing Pc of the power mode with one or more power level.RI report corresponding to this CSI process can comprise one or more RI.RI reports that order can indicate consistent with power mode.Power mode instruction can comprise all or part of of following information: for broadband or the sub-band channel status information feedback of 2D or 3D channel; For 2D or 3D channel in short-term or long time information feedback.
Power setting obtains by strengthening Pc instruction, and this instruction is such as but not limited to being Physical Resource Block (PRB) rank, Physical Resource Block group rank, subband rank, broadband rank, other instruction of sub-frame level.
Each set with equal-wattage pattern has independently RI report, unless RI makes other instruction with reference to process.
Correspondingly, subscriber equipment can be configured to the multiple PMI/CQI/RI corresponding to same community with different transmission power report.From the PMI/CQI/RI of these multiple reports, the suitable PMI/CQI/RI of the transmitting power of the current time-frequency resource corresponded to for UE scheduling can be selected in base station.
Such scheme supports the CSI feedback that multiple power levels controls and scheduling, improves systematic function, and only need increase a small amount of feedback overhead.
Fig. 4 shows the schematic diagram that signaling between the base station and the user equipment is according to still another embodiment of the invention transmitted.As shown in the figure, base station 112 indicates CSI process via RRC signaling 410 to subscriber equipment 123, and this CSIprocess comprises the instruction of space and power mode.Correspondingly, the information feedback 420 of subscriber equipment 123 comprises corresponding with the instruction of described space and power mode at least one group and indicates.
In order to alleviate presence of intercell interference, CoMP CS/CB uses beam allocation, and power control (comprising CoMP DPB) utilizes power division simultaneously.In this section, these two kinds of means are combined for interference mitigation.Such as, when base station 111 sends data to subscriber equipment 122 (standing the strongly disturbing Cell Edge User from base station 112), base station 112 can use wave beam (not shown) to send data with lower transmitting power to subscriber equipment 121, and this wave beam may cause the strong presence of intercell interference to subscriber equipment 122 when using full transmitting power.Again such as, when base station 112 sends data to subscriber equipment 123 (standing the strongly disturbing Cell Edge User from base station 111), base station 111 can use wave beam (not shown) to send data with lower transmitting power to subscriber equipment 121, and this wave beam may cause the strong presence of intercell interference to subscriber equipment 123 when using full transmitting power.
In some cases, 2D/3D wave beam and power may be restricted in some time-frequency resources.Except the existing configuration in standard, a CSI process can be associated with power mode with space.RI report corresponding to this CSI process can comprise one or more RI.RI reports that order can indicate consistent with space and power mode.Space and power mode indicate and can comprise all or part of of following information: 2D wave beam or 3D wave beam indicate; For broadband or the instruction of subband precoder of 2D or 3D channel; For 2D or 3D channel in short-term or long time CSI feedback.
Space and power setting indicate by RRC signaling and obtain, and this setting is such as but not limited to Physical Resource Block rank, Physical Resource Block group rank, subband rank, broadband rank, other instruction of sub-frame level.
Each set with same space and power mode has independently RI report, unless RI makes other instruction with reference to process.
Correspondingly, subscriber equipment can be configured to as the different wave beam of same community reports corresponding multiple PMI/CQI/RI with power mode.According to the PMI/CQI/RI of these multiple reports, base station can be selected to correspond to the transmitting power of current time-frequency resource and the suitable PMI/CQI/RI of wave beam restriction, for user scheduling.
Although illustrate and describe different embodiments of the invention, the present invention is not limited to these embodiments.Ordinal numbers such as " first ", " second " that occur in claim only plays the effect of difference, and and does not mean that to there is any specific order or annexation between corresponding component.The technical characteristic only occurred in some claim or embodiment also and do not mean that and can not combine with other features in other claims or embodiment to realize useful new technical scheme.When not deviating from the spirit and scope of the present invention described by claims, many amendments, change, distortion, substitute and equivalent be obvious to those skilled in the art.
Claims (10)
1. be suitable for a method for collaborative multicast communication, comprise:
Base station via radio resource control layer (RRC) signaling to subscriber equipment indicating channel state information formula (CSIprocess);
Wherein said channel condition information pattern comprises the instruction of spatial model and/or power mode.
2. the method for claim 1, is characterized in that, described channel condition information formula comprises the instruction of spatial model, and it is part or all of that the instruction of described spatial model comprises in the following: 2D wave beam or the instruction of 3D wave beam; For the broadband of 2D or 3D channel or the instruction of subband precoder; For 2D or 3D channel in short-term or long time information feedback.
3. method as claimed in claim 2, is characterized in that, the information feedback of described subscriber equipment comprises corresponding with the instruction of described spatial model at least one group and indicates.
4. method as claimed in claim 3, is characterized in that, described at least one group of instruction comprises order instruction and/or channel quality indicates and/or precoding index.
5. the method for claim 1, it is characterized in that, described channel condition information formula comprises the instruction of power mode, and it is part or all of that the instruction of described power mode comprises in the following: for broadband or the sub-band channel status information feedback of 2D or 3D channel; For 2D or 3D channel in short-term or long time information feedback.
6. method as claimed in claim 5, is characterized in that, the information feedback of described subscriber equipment comprises corresponding with the instruction of described power mode at least one group and indicates.
7. method as claimed in claim 6, is characterized in that, described at least one group of instruction comprises order instruction and/or channel quality indicates and/or precoding index.
8. the method for claim 1, is characterized in that, described channel condition information formula comprises the instruction of space and power mode.
9. method as claimed in claim 8, is characterized in that, the information feedback of described subscriber equipment comprises corresponding with the instruction of described space and power mode at least one group and indicates.
10. method as claimed in claim 9, is characterized in that, described at least one group of instruction comprises order instruction and/or channel quality indicates and/or precoding index.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018177164A1 (en) * | 2017-03-28 | 2018-10-04 | Huawei Technologies Co., Ltd. | Resource and power allocation indication in beam-based access system |
| WO2020062318A1 (en) * | 2018-09-26 | 2020-04-02 | Oppo广东移动通信有限公司 | Wireless communication method and terminal device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917365A (en) * | 2010-08-16 | 2010-12-15 | 中兴通讯股份有限公司 | Method, device and system for configuring codebook |
| CN102387006A (en) * | 2010-09-01 | 2012-03-21 | 夏普株式会社 | Channel state information feedback resource allocation method and channel state information feedback method |
| CN102611536A (en) * | 2011-01-20 | 2012-07-25 | 夏普株式会社 | Feedback method for channel status information and user equipment |
-
2014
- 2014-01-29 CN CN201410043901.9A patent/CN104811267A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917365A (en) * | 2010-08-16 | 2010-12-15 | 中兴通讯股份有限公司 | Method, device and system for configuring codebook |
| CN102387006A (en) * | 2010-09-01 | 2012-03-21 | 夏普株式会社 | Channel state information feedback resource allocation method and channel state information feedback method |
| CN102611536A (en) * | 2011-01-20 | 2012-07-25 | 夏普株式会社 | Feedback method for channel status information and user equipment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018177164A1 (en) * | 2017-03-28 | 2018-10-04 | Huawei Technologies Co., Ltd. | Resource and power allocation indication in beam-based access system |
| US10194445B2 (en) | 2017-03-28 | 2019-01-29 | Futurewei Technologies, Inc. | Resource and power allocation indication in beam-based access system |
| US10397930B2 (en) | 2017-03-28 | 2019-08-27 | Futurewei Technologies, Inc. | Resource and power allocation indication in beam-based access system |
| WO2020062318A1 (en) * | 2018-09-26 | 2020-04-02 | Oppo广东移动通信有限公司 | Wireless communication method and terminal device |
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Address after: 388 ningqiao Road, Shanghai free trade test area Applicant after: Shanghai NOKIA Baer Limited by Share Ltd Applicant after: Alcatel Optical Networks Israe Address before: 201206 Pudong New Area, Nanjing Road, No. 388, Shanghai Applicant before: Shanghai Alcatel-Lucent Co., Ltd. Applicant before: Alcatel Optical Networks Israe |
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