CN105743625A - Method and device for implementing downlink coordinated multiple point transmission - Google Patents
Method and device for implementing downlink coordinated multiple point transmission Download PDFInfo
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- CN105743625A CN105743625A CN201410756988.4A CN201410756988A CN105743625A CN 105743625 A CN105743625 A CN 105743625A CN 201410756988 A CN201410756988 A CN 201410756988A CN 105743625 A CN105743625 A CN 105743625A
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Abstract
The invention discloses a method and device for implementing downlink coordinated multiple point transmission and relates to the wireless communication field. The method comprises following steps: configuring a parameter set of a physical downlink shared channel PDSCH for joint transmission for user equipment UE, wherein the parameter set carries the number of joint transmission cells, the number of antenna ports adopted by each cell for transmitting cell special reference signal CRS and frequency deviation; sending the physical downlink shared channel PDSCH or enhanced physical downlink control channel EPDCCH to the UE, wherein the PDCCH information and the EPDCCH information indicate the parameter set; cooperatively performing rate matching and resource mapping of the PDSCH data according to the parameter set and joint transmission collaborative cells, wherein the PDSCH data is data which is sent to the UE by a main cell and the collaborative cells so that the joint transmission of PDSCH can be achieved.
Description
Technical field
The present invention relates to wireless communication field, be specifically related to a kind of method and apparatus realizing descending collaborative multicast communication.
Background technology
At LTE (LongTermEvolution, Long Term Evolution) in system, CoMP (CoordinatedMultiplePoints, descending collaborative multiple spot) transmit the technology being the transmission of a kind of multi-point joint with reception, namely refer to that the separate scattered transmission in multiple geographical position is serviced for multiple users by different cooperation modes (such as joint transmission, Combined Treatment, cooperative scheduling etc.).Wherein, multiple transmission points can be the base station with full resource management module, baseband processing module and radio frequency unit, or multiple radio frequency units of geographical position inequality and antenna (such as spaced antenna), or via node.CoMP transmission can improve the coverage of high speed data rate, improves the handling capacity of cell edge, can improve the handling capacity of system simultaneously.Descending CoMP transmission adopts Combined Treatment technology and cooperative scheduling (or cooperative beam figuration), and Combined Treatment technology is divided into again joint transmission (JointTransmission) and dynamic point to select (Dynamicpointselection).Joint transmission is that subscriber equipment is simultaneously received the PDSCH (Physicaldownlinksharedchannel sent by multiple transmission nodes, Physical Downlink Shared Channel) information, and these multiple PDSCH information are carried out relevant or incoherent merging, thus improving received signal quality, it is suppressed that the interference to this terminal of other subscriber equipment.Dynamic point selects to refer to that subscriber equipment is not be simultaneously received the PDSCH information that multiple transmission node sends, but receive only the PDSCH information that a transmission node sends every time, multiple transmission nodes in CoMP collaboration set according to the quality of channel quality, can be replaced by system.Cooperative scheduling (or cooperative beam figuration) refers to that the scheduling of user and precoding select decision to be by together deciding between the community in CoMP collaboration set.
nullIn descending CoMP, joint transmission is simultaneously to UE (UserEquipment by multiple transmission points，Subscriber equipment) send data，If the result of the cell ID ID mould 3 remainder number of the multiple transmission points sent is unequal or launches CRS (Cell-specificreferencesignals simultaneously，Community special reference signal) the antenna opening number that adopts is unequal，Then cooperation cell is when helping main plot to send data，Main plot cannot be helped to send data in the position launching CRS of cooperation cell，Current existing 3GPP (The3rdGenerationPartnershipProject，Third generation partner program) in Release11 (version 11) standard，Can only notify that UE solves the position considering a set of CRS when PDSCH resource maps，Namely when joint transmission，UE or the CRS position solution PDSCH resource mapping according to main plot，Or solve PDSCH resource according to the CRS position of one of them cooperation cell to map，Both approaches，Final all can make a part of PDSCH subcarrier can not joint transmission，Thus affecting the final performance of PDSCH joint transmission.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention provides a kind of method and apparatus realizing descending collaborative multicast communication, it is possible to make the effective joint transmission of PDSCH.
In order to reach the object of the invention, the invention provides a kind of method realizing descending collaborative multicast communication, be applied to the main plot of joint transmission, described method includes:
The parameter set of the Physical Downlink Shared Channel PDSCH of joint transmission it is used for for user equipment (UE) configuration；Described parameter set carry the quantity of the community of joint transmission, each cell transmission community special reference signal CRS adopt antenna port number and frequency shift (FS)；
Issue physical downlink control channel PDCCH information to described UE or strengthen Physical Downlink Control Channel EPDCCH information, described PDCCH information or EPDCCH information indicate described parameter set；
The rate-matched carrying out PDSCH data is worked in coordination with in cooperation cell according to described parameter set Yu joint transmission and resource maps, and wherein, described PDSCH data are the data that described UE is handed down in main plot and described cooperation cell.
Further, described configuration user equipment (UE) is for including before the parameter set of the Physical Downlink Shared Channel PDSCH of joint transmission: select the cooperation cell of user's joint transmission.
Further, parameter set also carries following one or multinomial:
The primary sign of mark ID, PDSCH of multicast single frequency network MBSFN sub-frame, zero energy channel status instruction reference signal CSI-RS, the accurate ID with the non-zero power CSI-RS positioning qcl.
Further, described parameter set utilizes CRS antenna port number parameter field and CRS frequency offset parameters territory to carry each cell transmission community special reference signal CRS antenna port number adopted and frequency shift (FS) respectively；
CRS antenna port number parameter field value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the antenna port number that one cell transmission community special reference signal CRS of each value corresponding joint transmission respectively adopts, remaining N-(crs-CellsNum-r11) is individual for invalid value；
CRS frequency offset parameters territory value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the frequency shift (FS) that corresponding one cell transmission community special reference signal CRS of joint transmission adopts respectively of each value, remaining N-(crs-CellsNum-r11) is individual for invalid value, value order and the order one_to_one corresponding of CRS antenna port number parameter field, wherein, crs-CellsNum-r11 is the quantity of the community of joint transmission, and N is the maximum community number participating in joint transmission.
In order to reach the object of the invention, present invention also offers a kind of device realizing descending collaborative multicast communication, be arranged on the main plot of joint transmission, including:
Configuration module, for being used for the parameter set of the Physical Downlink Shared Channel PDSCH of joint transmission for user equipment (UE) configuration；Described parameter set carry the quantity of the community of joint transmission, each cell transmission community special reference signal CRS adopt antenna port number and frequency shift (FS)；
Sending module, for issuing physical downlink control channel PDCCH information to described UE or strengthening Physical Downlink Control Channel EPDCCH information, indicates described parameter set in described PDCCH information or EPDCCH information；
Processing module, for working in coordination with the rate-matched carrying out PDSCH data and resource mapping according to the cooperation cell of described parameter set Yu joint transmission, wherein, described PDSCH data are the data that described UE is handed down in main plot and described cooperation cell.
Preferably, described device also includes: select module, for selecting the cooperation cell of user's joint transmission.
In order to reach the object of the invention, present invention also offers a kind of method realizing descending collaborative multicast communication, be applied to user equipment (UE), described method includes:
Receive physical downlink control channel PDCCH information or strengthen Physical Downlink Control Channel EPDCCH information；
Resolve the configuration of the parameter set of described PDCCH information or the instruction of EPDCCH information；
Physical Downlink Shared Channel PDSCH data are demodulated according to described parameter set.
Further, parameter set also carries following one or multinomial:
The primary sign of mark ID, PDSCH of multicast single frequency network MBSFN sub-frame, zero energy channel status instruction reference signal CSI-RS, the accurate ID with the non-zero power CSI-RS positioning qcl.
Further, described parameter set utilizes CRS antenna port number parameter field and CRS frequency offset parameters territory to carry each cell transmission community special reference signal CRS antenna port number adopted and frequency shift (FS) respectively；
CRS antenna port number parameter field value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the antenna port number that one cell transmission community special reference signal CRS of each value corresponding joint transmission respectively adopts, remaining N-(crs-CellsNum-r11) is individual for invalid value；
CRS frequency offset parameters territory value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the frequency shift (FS) that corresponding one cell transmission community special reference signal CRS of joint transmission adopts respectively of each value, remaining N-(crs-CellsNum-r11) is individual for invalid value, value order and the order one_to_one corresponding of CRS antenna port number parameter field, wherein, crs-CellsNum-r11 is the quantity of the community of joint transmission, and N is the maximum community number participating in joint transmission.
In order to reach the object of the invention, present invention also offers a kind of device realizing descending collaborative multicast communication, be arranged on user equipment (UE), including:
Receiver module, is used for receiving physical downlink control channel PDCCH information or strengthening Physical Downlink Control Channel EPDCCH information；
Parsing module, for resolving the configuration of the parameter set of described PDCCH information or the instruction of EPDCCH information；
Data demodulation module, for demodulating Physical Downlink Shared Channel PDSCH data according to described parameter set.
In order to reach the object of the invention, present invention also offers a kind of method realizing descending collaborative multicast communication, including:
The main plot of joint transmission is the user equipment (UE) configuration parameter set for the Physical Downlink Shared Channel PDSCH of joint transmission；Described parameter set carry the quantity of the community of joint transmission, each cell transmission community special reference signal CRS adopt antenna port number and frequency shift (FS)；
Described main plot issues physical downlink control channel PDCCH information to described UE or strengthens Physical Downlink Control Channel EPDCCH information, indicates described parameter set in described PDCCH information or EPDCCH information；
Described main plot works in coordination with, according to the cooperation cell of described parameter set Yu joint transmission, the rate-matched carrying out PDSCH data and resource maps, and wherein, described PDSCH data are the data that described UE is handed down in main plot and described cooperation cell；
Described UE receives physical downlink control channel PDCCH information or strengthens Physical Downlink Control Channel EPDCCH information；
Described UE resolves the configuration of the parameter set of described PDCCH information or the instruction of EPDCCH information；
Described UE demodulates Physical Downlink Shared Channel PDSCH data according to described parameter set.
Compared with prior art, the present invention propose a kind of realize descending CoMP realize method, the parameter set of Physical Downlink Shared Channel PDSCH carries the quantity of the community of joint transmission, each cell transmission community special reference signal CRS adopt antenna port number and frequency shift (FS), inform that UE demodulates PDSCH resource and maps the position needing to consider a few set CRS so that descending joint transmission can effectively realize.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from description, or understand by implementing the present invention.The purpose of the present invention and other advantages can be realized by structure specifically noted in description, claims and accompanying drawing and be obtained.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is a kind of method flow diagram realizing descending collaborative multicast communication of the embodiment of the present invention；
Fig. 2 is the structural representation of a kind of device realizing descending collaborative multicast communication of the embodiment of the present invention；
Fig. 3 is the method flow diagram that the another kind of the embodiment of the present invention realizes descending collaborative multicast communication；
Fig. 4 is the structural representation that the another kind of the embodiment of the present invention realizes the device of descending collaborative multicast communication.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with accompanying drawing, embodiments of the invention are described in detail.It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
As it is shown in figure 1, the present invention provides a kind of method realizing descending collaborative multicast communication, being applied to the main plot of joint transmission, described method includes:
A, for the user equipment (UE) configuration parameter set of Physical Downlink Shared Channel PDSCH for joint transmission；Described parameter set carry the quantity of the community of joint transmission, each cell transmission community special reference signal CRS adopt antenna port number and frequency shift (FS)；
B, issue to described UE physical downlink control channel PDCCH information or strengthen Physical Downlink Control Channel EPDCCH information, described PDCCH information or EPDCCH information indicate described parameter set；
C, cooperation cell according to described parameter set Yu joint transmission works in coordination with the rate-matched carrying out PDSCH data and resource maps, and wherein, described PDSCH data are the data that described UE is handed down in main plot and described cooperation cell.
Wherein include before step A: select the cooperation cell of user's joint transmission.
Wherein, parameter set also carries following one or multinomial:
The primary sign of mark ID, PDSCH of multicast single frequency network MBSFN sub-frame, zero energy channel status instruction reference signal CSI-RS, the accurate ID with the non-zero power CSI-RS positioning qcl.
Described parameter set utilizes CRS antenna port number parameter field and CRS frequency offset parameters territory to carry each cell transmission community special reference signal CRS antenna port number adopted and frequency shift (FS) respectively；
CRS antenna port number parameter field value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the antenna port number that one cell transmission community special reference signal CRS of each value corresponding joint transmission respectively adopts, remaining N-(crs-CellsNum-r11) is individual for invalid value；
CRS frequency offset parameters territory value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the frequency shift (FS) that corresponding one cell transmission community special reference signal CRS of joint transmission adopts respectively of each value, remaining N-(crs-CellsNum-r11) is individual for invalid value, value order and the order one_to_one corresponding of CRS antenna port number parameter field, wherein, crs-CellsNum-r11 is the quantity of the community of joint transmission, and N is the maximum community number participating in joint transmission.
CRS antenna port number parameter field is expressed as crs-PortsCount-r11, and the CRS antenna port number adopted is launched in instruction；
CRS frequency offset parameters domain representation is crs-FreqShift-r11, and the CRS frequency shift (FS) adopted is launched in instruction；
MBSFN (MultimediaBroadcastmulticastserviceSingleFrequencyNetwor k, multicast single frequency network) subframe parameter field is expressed as mbsfn-SubframeConfigList-r11, the MBSFN sub-frame of instruction high level configuration；
Nulling power CSI-RS (ChannelStateInformationReferenceSignal, channel status instruction reference signal) ID parameter field be expressed as csi-RS-ConfigZPId-r11, indicate current PDSCH to need the ID of CSI-RS of 0 power considered；
The primary sign parameter field of PDSCH is expressed as pdsch-Start-r11, the primary sign of instruction PDSCH；
The ID parameter field of the non-zero power CSI-RS of qcl (quasico-located, accurate with location) is expressed as qcl-CSI-RS-ConfigNZPId-r11, and instruction and current PDSCH meet the ID of the non-zero power CSI-RS of qcl；
The number parameter domain representation of the community of joint transmission is crs-CellsNum-r11, indicates the quantity of the community of current PDSCH joint transmission.
The present embodiments relate to the parameter field crs-CellsNum-r11, crs-PortsCount-r11 and the crs-FreqShift-r11 that change:
Wherein, crs-CellsNum-r11 indicates the quantity of the community of joint transmission；
Value number is extended for N number of by crs-PortsCount-r11, wherein front crs-CellsNum-r11 is virtual value, the CRS of each value community of corresponding joint transmission respectively launches the port number adopted, remaining N-(crs-CellsNum-r11) is individual for invalid value, and N is the maximum community number participating in joint transmission；
Crs-FreqShift-r11: value number is extended for N number of, wherein front crs-CellsNum-r11 is virtual value, the CRS of each value corresponding one community of joint transmission respectively launches the frequency shift (FS) adopted, remaining N-(crs-CellsNum-r11) is individual for invalid value, value order and the order one_to_one corresponding of crs-PortsCount-r11, N is the maximum community number participating in joint transmission.
The territory having had about PDSCH parameter set in current 3GPPRelease11 standard (3GPPTS36.213V11.8.0 7.1.9 joint) is:
·crs-PortsCount-r11.
·crs-FreqShift-r11.
·mbsfn-SubframeConfigList-r11.
·csi-RS-ConfigZPId-r11.
·pdsch-Start-r11.
·qcl-CSI-RS-ConfigNZPId-r11.
There are two crs-PortsCount-r11 and crs-FreqShift-r11 in the territory that the present embodiments relate to, wherein crs-PortsCount-r11 indicates current PDSCH resource to map the antenna opening number of the CRS adopted, and crs-FreqShift-r11 indicates current PDSCH resource to map the frequency shift (FS) of the CRS adopted.
When configuration is for the parameter set of joint transmission, based on the territory having had in current standard, the embodiment of the present invention increases a territory simultaneously need to the value in two territories in expansion standard, it is necessary to the territory of increase is:
Crs-CellsNum-r11: this territory points out that UE solves PDSCH resource and maps the total community number corresponding for CRS needing to consider；
In embodiment of the present invention expansion standard, the value in two territories, is respectively as follows:
Crs-PortsCount-r11: standard can only take a value at present, value number is extended for N number of by the present invention, wherein front crs-CellsNum-r11 is virtual value, the CRS of each value community of corresponding joint transmission respectively launches the port number adopted, remaining N-(crs-CellsNum-r11) is individual for invalid value, and N is the maximum community number participating in joint transmission；
Crs-FreqShift-r11: standard can only take a value at present, value number is extended for N number of by the present invention, wherein front crs-CellsNum-r11 is virtual value, the CRS of each value corresponding one community of joint transmission respectively launches the frequency shift (FS) adopted, remaining N-(crs-CellsNum-r11) is individual for invalid value, value order and the order one_to_one corresponding of crs-PortsCount-r11, N is the maximum community number participating in joint transmission.
In step C, main plot issues PDCCH (Physicaldownlinkcontrolchannel)/EPDCCH (Enhancedphysicaldownlinkcontrolchannel) to UE, and send PDSCH data to UE together with cooperation cell, wherein in PDCCH/EPDCCH, the parameter set of instruction is rate-matched and the resource mapping that in above-mentioned steps B, the parameter set for joint transmission of configuration, main plot and cooperation cell carry out PDSCH according to the configuration in parameter set；
As in figure 2 it is shown, the present invention also provides for a kind of device realizing descending collaborative multicast communication, it is arranged on the main plot of joint transmission, including:
Configuration module, for being used for the parameter set of the Physical Downlink Shared Channel PDSCH of joint transmission for user equipment (UE) configuration；Described parameter set carry the quantity of the community of joint transmission, each cell transmission community special reference signal CRS adopt antenna port number and frequency shift (FS)；
Sending module, for issuing physical downlink control channel PDCCH information to described UE or strengthening Physical Downlink Control Channel EPDCCH information, indicates described parameter set in described PDCCH information or EPDCCH information；
Processing module, for working in coordination with the rate-matched carrying out PDSCH data and resource mapping according to the cooperation cell of described parameter set Yu joint transmission, wherein, described PDSCH data are the data that described UE is handed down in main plot and described cooperation cell.
Described device also includes: select module, for selecting the cooperation cell of user's joint transmission.
As it is shown on figure 3, the present invention also provides for a kind of method realizing descending collaborative multicast communication, being applied to user equipment (UE), described method includes:
D, reception physical downlink control channel PDCCH information or enhancing Physical Downlink Control Channel EPDCCH information；
E, resolve the configuration of the parameter set of described PDCCH information or the instruction of EPDCCH information；
F, according to described parameter set demodulate Physical Downlink Shared Channel PDSCH data.
Wherein, parameter set also carries following one or multinomial:
The primary sign of mark ID, PDSCH of multicast single frequency network MBSFN sub-frame, zero energy channel status instruction reference signal CSI-RS, the accurate ID with the non-zero power CSI-RS positioning qcl.
Described parameter set utilizes CRS antenna port number parameter field and CRS frequency offset parameters territory to carry each cell transmission community special reference signal CRS antenna port number adopted and frequency shift (FS) respectively；
CRS antenna port number parameter field value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the antenna port number that one cell transmission community special reference signal CRS of each value corresponding joint transmission respectively adopts, remaining N-(crs-CellsNum-r11) is individual for invalid value；
CRS frequency offset parameters territory value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the frequency shift (FS) that corresponding one cell transmission community special reference signal CRS of joint transmission adopts respectively of each value, remaining N-(crs-CellsNum-r11) is individual for invalid value, value order and the order one_to_one corresponding of CRS antenna port number parameter field, wherein, crs-CellsNum-r11 is the quantity of the community of joint transmission, and N is the maximum community number participating in joint transmission.
CRS antenna port number parameter field is expressed as crs-PortsCount-r11, and the CRS antenna port number adopted is launched in instruction；
CRS frequency offset parameters domain representation is crs-FreqShift-r11, and the CRS frequency shift (FS) adopted is launched in instruction；
MBSFN (MultimediaBroadcastmulticastserviceSingleFrequencyNetwor k, multicast single frequency network) subframe parameter field is expressed as mbsfn-SubframeConfigList-r11, the MBSFN sub-frame of instruction high level configuration；
Nulling power CSI-RS (ChannelStateInformationReferenceSignal, channel status instruction reference signal) ID parameter field be expressed as csi-RS-ConfigZPId-r11, indicate current PDSCH to need the ID of CSI-RS of 0 power considered；
The primary sign parameter field of PDSCH is expressed as pdsch-Start-r11, the primary sign of instruction PDSCH；
The ID parameter field of the non-zero power CSI-RS of qcl (quasico-located, accurate with location) is expressed as qcl-CSI-RS-ConfigNZPId-r11, and instruction and current PDSCH meet the ID of the non-zero power CSI-RS of qcl；
The number parameter domain representation of the community of joint transmission is crs-CellsNum-r11, indicates the quantity of the community of current PDSCH joint transmission.
As shown in Figure 4, the present invention also provides for a kind of device realizing descending collaborative multicast communication, is arranged on user equipment (UE), including:
Receiver module, is used for receiving physical downlink control channel PDCCH information or strengthening Physical Downlink Control Channel EPDCCH information；
Parsing module, for resolving the configuration of the parameter set of described PDCCH information or the instruction of EPDCCH information；
Data demodulation module, for demodulating Physical Downlink Shared Channel PDSCH data according to described parameter set.
As shown in figs. 1 and 3, the present invention also provides for a kind of method realizing descending collaborative multicast communication, including:
The main plot of joint transmission is the user equipment (UE) configuration parameter set for the Physical Downlink Shared Channel PDSCH of joint transmission；Described parameter set carry the quantity of the community of joint transmission, each cell transmission community special reference signal CRS adopt antenna port number and frequency shift (FS)；
Described main plot issues physical downlink control channel PDCCH information to described UE or strengthens Physical Downlink Control Channel EPDCCH information, indicates described parameter set in described PDCCH information or EPDCCH information；
Described main plot works in coordination with, according to the cooperation cell of described parameter set Yu joint transmission, the rate-matched carrying out PDSCH data and resource maps, and wherein, described PDSCH data are the data that described UE is handed down in main plot and described cooperation cell；
Described UE receives physical downlink control channel PDCCH information or strengthens Physical Downlink Control Channel EPDCCH information；
Described UE resolves the configuration of the parameter set of described PDCCH information or the instruction of EPDCCH information；
Described UE demodulates Physical Downlink Shared Channel PDSCH data according to described parameter set.
Embodiment 1
For the method that realizes of CoMP descending in LTE system, in the present embodiment, main plot have selected a cooperation cell and carries out joint transmission, comprises the following steps:
Step S101: community ID is the main plot of N1, selects to the cooperation cell of UE joint transmission, and the ID of selected cooperation cell is N2, and the antenna opening number of two cell transmission CRS is all 2；
Step S102: the parameter set of main plot configuration user, in the parameter set of joint transmission, three territories that the present invention relates to are configured to；
Crs-CellsNum-r11: value is 2；
Crs-PortsCount-r11: value is 2,2,0；The value of N is 3 here, and last 0 is invalid value；
Crs-FreqShift-r11: value is N1mod6, N2mod6,0；The value of N is 3 here, and last 0 is invalid value；
Step S103: main plot issues PDCCH/EPDCCH to UE, and sends PDSCH data to UE together with cooperation cell, wherein in PDCCH/EPDCCH, the parameter set of instruction is the parameter set for joint transmission of configuration in above-mentioned steps S102；When PDSCH is launched in main plot and cooperation cell, carry out rate-matched and the resource mapping of PDSCH according to the configuration in parameter set；
Step S104:UE receives PDCCH/EPDCCH, and parses parameter set therein configuration；
Step S105:UE configures demodulation PDSCH resource according to the parameter set in step S104 and maps, and demodulates PDSCH data further.
Embodiment 2
For the method that realizes of CoMP descending in LTE system, in the present embodiment, main plot have selected two cooperation cell and carries out joint transmission, comprises the following steps:
Step S201: community ID is the main plot of N1, selects to the cooperation cell of UE joint transmission, and the ID of first selected cooperation cell is N2, and the ID of second selected cooperation cell is N3, the antenna opening number of three cell transmission CRS respectively 2,2,4；
Step S202: the parameter set of main plot configuration user, in the parameter set of joint transmission, three territories that the present invention relates to are configured that
Crs-CellsNum-r11: value is 3；
Crs-PortsCount-r11: value is 2,2,4；The value of N is 3 here；
Crs-FreqShift-r11: value is N1mod6, N2mod6, N3mod6；The value of N is 3 here；
Step S203: main plot issues PDCCH/EPDCCH to UE, and sends PDSCH data to UE together with cooperation cell, wherein in PDCCH/EPDCCH, the parameter set of instruction is the parameter set for joint transmission of configuration in above-mentioned steps S102；When PDSCH is launched in main plot and cooperation cell, carry out rate-matched and the resource mapping of PDSCH according to the configuration in parameter set；
Step S204:UE receives PDCCH/EPDCCH, and parses parameter set therein configuration；
Step S205:UE configures demodulation PDSCH resource according to the parameter set in step S204 and maps, and demodulates PDSCH data further.
The CoMP that the present invention proposes realizes method, the method increasing a territory in the existing parameter set of Current standards so that joint transmission can effectively realize.
The above, be only the preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (11)
1. the method realizing descending collaborative multicast communication, it is characterised in that being applied to the main plot of joint transmission, described method includes:
The parameter set of the Physical Downlink Shared Channel PDSCH of joint transmission it is used for for user equipment (UE) configuration；Described parameter set carry the quantity of the community of joint transmission, each cell transmission community special reference signal CRS adopt antenna port number and frequency shift (FS)；
Issue physical downlink control channel PDCCH information to described UE or strengthen Physical Downlink Control Channel EPDCCH information, described PDCCH information or EPDCCH information indicate described parameter set；
The rate-matched carrying out PDSCH data is worked in coordination with in cooperation cell according to described parameter set Yu joint transmission and resource maps, and wherein, described PDSCH data are the data that described UE is handed down in main plot and described cooperation cell.
2. method according to claim 1, it is characterised in that described configuration user equipment (UE) is for including before the parameter set of the Physical Downlink Shared Channel PDSCH of joint transmission: select the cooperation cell of user's joint transmission.
3. method according to claim 1 and 2, it is characterised in that parameter set also carries following one or multinomial:
The primary sign of mark ID, PDSCH of multicast single frequency network MBSFN sub-frame, zero energy channel status instruction reference signal CSI-RS, the accurate ID with the non-zero power CSI-RS positioning qcl.
4. method according to claim 1, it is characterised in that described parameter set utilizes CRS antenna port number parameter field and CRS frequency offset parameters territory to carry each cell transmission community special reference signal CRS antenna port number adopted and frequency shift (FS) respectively；
CRS antenna port number parameter field value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the antenna port number that one cell transmission community special reference signal CRS of each value corresponding joint transmission respectively adopts, remaining N-(crs-CellsNum-r11) is individual for invalid value；
CRS frequency offset parameters territory value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the frequency shift (FS) that corresponding one cell transmission community special reference signal CRS of joint transmission adopts respectively of each value, remaining N-(crs-CellsNum-r11) is individual for invalid value, value order and the order one_to_one corresponding of CRS antenna port number parameter field, wherein, crs-CellsNum-r11 is the quantity of the community of joint transmission, and N is the maximum community number participating in joint transmission.
5. the device realizing descending collaborative multicast communication, it is characterised in that be arranged on the main plot of joint transmission, including:
Configuration module, for being used for the parameter set of the Physical Downlink Shared Channel PDSCH of joint transmission for user equipment (UE) configuration；Described parameter set carry the quantity of the community of joint transmission, each cell transmission community special reference signal CRS adopt antenna port number and frequency shift (FS)；
Sending module, for issuing physical downlink control channel PDCCH information to described UE or strengthening Physical Downlink Control Channel EPDCCH information, indicates described parameter set in described PDCCH information or EPDCCH information；
Processing module, for working in coordination with the rate-matched carrying out PDSCH data and resource mapping according to the cooperation cell of described parameter set Yu joint transmission, wherein, described PDSCH data are the data that described UE is handed down in main plot and described cooperation cell.
6. device according to claim 5, it is characterised in that also include: select module, for selecting the cooperation cell of user's joint transmission.
7. the method realizing descending collaborative multicast communication, it is characterised in that being applied to user equipment (UE), described method includes:
Receive physical downlink control channel PDCCH information or strengthen Physical Downlink Control Channel EPDCCH information；
Resolve the configuration of the parameter set of described PDCCH information or the instruction of EPDCCH information；
Physical Downlink Shared Channel PDSCH data are demodulated according to described parameter set.
8. method according to claim 7, it is characterised in that parameter set also carries following one or multinomial:
The primary sign of mark ID, PDSCH of multicast single frequency network MBSFN sub-frame, zero energy channel status instruction reference signal CSI-RS, the accurate ID with the non-zero power CSI-RS positioning qcl.
9. method according to claim 8, it is characterised in that described parameter set utilizes CRS antenna port number parameter field and CRS frequency offset parameters territory to carry each cell transmission community special reference signal CRS antenna port number adopted and frequency shift (FS) respectively；
CRS antenna port number parameter field value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the antenna port number that one cell transmission community special reference signal CRS of each value corresponding joint transmission respectively adopts, remaining N-(crs-CellsNum-r11) is individual for invalid value；
CRS frequency offset parameters territory value number is N number of, wherein front crs-CellsNum-r11 is virtual value, the frequency shift (FS) that corresponding one cell transmission community special reference signal CRS of joint transmission adopts respectively of each value, remaining N-(crs-CellsNum-r11) is individual for invalid value, value order and the order one_to_one corresponding of CRS antenna port number parameter field, wherein, crs-CellsNum-r11 is the quantity of the community of joint transmission, and N is the maximum community number participating in joint transmission.
10. the device realizing descending collaborative multicast communication, it is characterised in that be arranged on user equipment (UE), including:
Receiver module, is used for receiving physical downlink control channel PDCCH information or strengthening Physical Downlink Control Channel EPDCCH information；
Parsing module, for resolving the configuration of the parameter set of described PDCCH information or the instruction of EPDCCH information；
Data demodulation module, for demodulating Physical Downlink Shared Channel PDSCH data according to described parameter set.
11. the method realizing descending collaborative multicast communication, it is characterised in that including:
The main plot of joint transmission is the user equipment (UE) configuration parameter set for the Physical Downlink Shared Channel PDSCH of joint transmission；Described parameter set carry the quantity of the community of joint transmission, each cell transmission community special reference signal CRS adopt antenna port number and frequency shift (FS)；
Described main plot issues physical downlink control channel PDCCH information to described UE or strengthens Physical Downlink Control Channel EPDCCH information, indicates described parameter set in described PDCCH information or EPDCCH information；
Described main plot works in coordination with, according to the cooperation cell of described parameter set Yu joint transmission, the rate-matched carrying out PDSCH data and resource maps, and wherein, described PDSCH data are the data that described UE is handed down in main plot and described cooperation cell；
Described UE receives physical downlink control channel PDCCH information or strengthens Physical Downlink Control Channel EPDCCH information；
Described UE resolves the configuration of the parameter set of described PDCCH information or the instruction of EPDCCH information；
Described UE demodulates Physical Downlink Shared Channel PDSCH data according to described parameter set.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410756988.4A CN105743625A (en) | 2014-12-10 | 2014-12-10 | Method and device for implementing downlink coordinated multiple point transmission |
| PCT/CN2015/088407 WO2016090964A1 (en) | 2014-12-10 | 2015-08-28 | Method and device for realizing downlink coordinated multiple point transmission |
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| CN201410756988.4A CN105743625A (en) | 2014-12-10 | 2014-12-10 | Method and device for implementing downlink coordinated multiple point transmission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018170886A1 (en) * | 2017-03-24 | 2018-09-27 | 华为技术有限公司 | Data transmission method, device, and system |
| CN108631984A (en) * | 2017-03-24 | 2018-10-09 | 中兴通讯股份有限公司 | A kind of information configuring methods and device |
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| CN103561475A (en) * | 2012-05-11 | 2014-02-05 | 英特尔公司 | Signaling for downlink coordinated multipoint in a wireless communication system |
| CN103974420A (en) * | 2013-02-04 | 2014-08-06 | 普天信息技术研究院有限公司 | Device-to-device (D2D) data transmitting method in long-term evolution system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9871636B2 (en) * | 2013-01-18 | 2018-01-16 | Qualcomm Incorporated | Enhanced control channel element (ECCE) based physical downlink shared channel (PDSCH) resource allocation for long-term evolution (LTE) |
| CN110149724B (en) * | 2013-05-10 | 2023-04-07 | 北京三星通信技术研究有限公司 | Method and device for realizing multi-subframe scheduling of physical downlink shared channel |
| KR101786279B1 (en) * | 2013-05-30 | 2017-11-15 | 엘지전자 주식회사 | Method and device for decoding downlink data |
-
2014
- 2014-12-10 CN CN201410756988.4A patent/CN105743625A/en not_active Withdrawn
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561475A (en) * | 2012-05-11 | 2014-02-05 | 英特尔公司 | Signaling for downlink coordinated multipoint in a wireless communication system |
| CN103974420A (en) * | 2013-02-04 | 2014-08-06 | 普天信息技术研究院有限公司 | Device-to-device (D2D) data transmitting method in long-term evolution system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018170886A1 (en) * | 2017-03-24 | 2018-09-27 | 华为技术有限公司 | Data transmission method, device, and system |
| CN108631984A (en) * | 2017-03-24 | 2018-10-09 | 中兴通讯股份有限公司 | A kind of information configuring methods and device |
| CN110337790A (en) * | 2017-03-24 | 2019-10-15 | 华为技术有限公司 | A kind of data transmission method, device and system |
| US11115882B2 (en) | 2017-03-24 | 2021-09-07 | Huawei Technologies Co., Ltd. | Data transmission method, apparatus, and system |
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