CN106604311A

CN106604311A - Method and device for selecting transmission node participating in coordinated multipoint transmission

Info

Publication number: CN106604311A
Application number: CN201510671254.0A
Authority: CN
Inventors: 陈军; 庄宏成; 罗泽宙
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2015-10-13
Filing date: 2015-10-13
Publication date: 2017-04-26
Anticipated expiration: 2035-10-13
Also published as: WO2017063430A1; CN106604311B

Abstract

The invention relates to the technical field of communication and particularly relates to a method and device for selecting a transmission node participating in coordinated multipoint transmission, aiming to solve the problems of large user measurement feedback amount and low CoMP transmission performance. The method for selecting a transmission node participating in CoMP transmission includes distributing the measurement information to the UE in the coverage range by the network side equipment; receiving a first transmission node TP set for the CoMP transmission fed back by the UE based on the measurement information after the cell measurement; and determining a second TP set for participating the CoMP transmission for the UE according to the first TP set fed back by the UE.

Description

Method and device for selecting transmission node participating in coordinated multi-point transmission

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for selecting a transmission node TP participating in coordinated multi-point CoMP transmission.

Background

With the development of smart phones, the explosive growth of various applications has led to a dramatic increase in the demand for data transmission, and meanwhile, ubiquitous communication demands have put higher demands on the coverage of wireless communication systems. In order to meet the requirements of data transmission rate and coverage of communication systems, cells are gradually miniaturized and concentrated. However, the cell density increases the overlapping area between cells, and the inter-cell interference increases. In order to reduce the interference of cell edge users, the cell edge throughput rate is improved. The third generation partnership Project (3 GPP) has proposed Coordinated multi-point (CoMP) technology in LTE advanced (LTE-a).

The CoMP technology performs cooperation and communication between User Equipment (UE) through a plurality of Transmission Points (TPs), where a TP may refer to any node that can provide signal coverage for the UE, such as a base station, a relay node, a Remote Radio Head (RRH), a Radio Remote Unit (RRU), an antenna port (antenna port), and the like.

Selecting each TP participating in CoMP transmission for the UE is an important premise for ensuring the CoMP transmission quality. In general, a macro base station selects a set of TPs participating in CoMP transmission for a UE according to Reference Signal Received Power (RSRP) or Reference Signal Receiving Quality (RSRQ) measured by the UE and CQI, in combination with a load condition of each TP.

In the above manner, each time the TP set participating in CoMP transmission is selected for the UE, the UE is required to perform cell measurement and report various measurement information, and the macro base station individually configures the TP set participating in CoMP transmission for the UE according to the measurement information reported by each UE. In an Ultra-dense networking (UDN) scene, the number of various TPs is large, and a user measurement feedback amount is large; moreover, configuring the TP sets participating in CoMP transmission separately for each UE may result in too many configured TP sets, and interference inevitably exists between different TP sets, thereby reducing performance of CoMP transmission.

Disclosure of Invention

The embodiment of the application provides a method and a device for selecting a transmission node TP participating in CoMP transmission, which are used for solving the problems of large measurement feedback quantity and low performance of CoMP transmission of a user.

In a first aspect, a method for selecting a transmission node participating in CoMP transmission is provided, including:

the network side equipment issues measurement information to User Equipment (UE) within a coverage range;

the network side equipment receives a first transmission node TP set which is fed back by each UE after cell measurement is carried out on the basis of the measurement information and is used for CoMP transmission;

and the network side equipment determines a second TP set participating in CoMP transmission for each UE according to the first TP set fed back by each UE.

With reference to the first aspect, in a first possible implementation manner, the issuing, by the network side device, measurement information to the UE in the coverage area includes:

the network side equipment divides each covered UE into a plurality of configuration sets and indicates the same measurement information for the UE in the same configuration set;

the network side equipment determines a second TP set participating in CoMP transmission for each UE according to the first TP set fed back by each UE, and the method comprises the following steps:

and the network side equipment determines at least one second TP set participating in CoMP transmission for each configuration set according to the first TP set fed back by each UE in each configuration set.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, the dividing, by the network side device, each covered UE into multiple configuration sets includes:

the network side equipment divides each covered UE into a plurality of geographical area sets, wherein each UE in each geographical area set can receive at least one signal of the same TP;

for each geographical area set, dividing each UE in the geographical area set into different SINR sets according to the SINR measured by each UE in the geographical area set, wherein each SINR set is used as one configuration set; wherein, different SINR sets respectively correspond to different SINR value ranges.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the measurement information includes one or more of the following information:

information indicating a maximum number of TPs that the UE can select for CoMP transmission;

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

and indicating the SINR value ranges respectively corresponding to different SINR sets.

With reference to the second or third possible implementation manner of the first aspect, in a fourth possible implementation manner, the dividing, by the network side device, each UE that is covered into multiple geographic area sets includes:

the network side equipment divides covered UE into a plurality of geographical area sets according to one or more of the following information:

the reference signal received quality RSRP values of different TPs measured by each UE;

path loss values measured by each UE for different TPs;

geographical location coordinate information of each UE.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the RSRP is an RSRP based on a cell-specific reference signal CRS, or an RSRP based on a channel state information reference signal CSI-RS.

With reference to any one of the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation manner, the determining, by the network side device, at least one second TP set participating in CoMP transmission for each configuration set according to a first TP set fed back by each UE in each configuration set includes:

for each configuration set, the network side equipment selects each first TP set only including TPs within the coverage range of the network side equipment from the first TP sets fed back by each UE;

the network side equipment screens out each TP which meets the condition of participating in CoMP transmission from each selected first TP set;

and the network side equipment determines at least one second TP set participating in CoMP transmission for each configuration set according to each TP screened from each selected first TP set.

With reference to any one of the first to sixth possible implementation manners of the first aspect, in a seventh possible implementation manner, the determining, by the network side device, at least one second TP set participating in CoMP transmission for each configuration set according to a first TP set fed back by each UE in each configuration set includes:

for each configuration set, the network side equipment selects each first TP set of TPs out of the coverage range of the network side equipment from the first TP sets fed back by each UE;

the network side equipment screens out all TPs meeting the conditions participating in CoMP transmission from all selected first TP sets through negotiation with adjacent network side equipment;

With reference to the sixth or seventh possible implementation manner of the first aspect, in an eighth possible implementation manner, the condition for participating in CoMP transmission includes one or more of the following conditions:

the load value is lower than a set load threshold value;

the residual capacity of the backhaul link is higher than a set capacity threshold;

the return time delay is lower than the set time delay;

the channel quality indication CQI value is greater than the set CQI threshold.

With reference to the seventh possible implementation manner of the first aspect, in a ninth possible implementation manner, the negotiating between the network-side device and the adjacent network-side device includes:

the network side equipment and the adjacent network side equipment interact one or more of the following information:

selecting a number of UEs for each TP in the first set of TPs;

backhaul link remaining capacity of each TP within the first set of TPs;

backhaul delays between TPs in the first set of TPs;

TPs that are not eligible to participate in CoMP transmission.

With reference to any one of the first to ninth possible implementation manners of the first aspect, in a tenth possible implementation manner, the determining, by the network side device, at least one second TP set participating in CoMP transmission for each configuration set according to a first TP set fed back by each UE in each configuration set includes:

dividing each TP in the first TP set fed back by each UE into N third TP sets aiming at each configuration set; when N is greater than or equal to 2, in the N third TP sets, the number of the same UE served by any two third TP sets is less than 1/N of the number of the UE served by the two third TP sets, and N is a natural number greater than or equal to 1;

taking each divided third TP set as one second TP set; or,

for each third TP set, selecting a set number of TPs from the third TP set as one second TP set according to the number of the UEs selecting each TP; wherein, the second TP set includes the network side device.

With reference to any one of the first to tenth possible implementation manners of the first aspect, in an eleventh possible implementation manner, after the determining, by the network side device, for each configuration set, at least two second TP sets participating in CoMP transmission for each configuration set, the method further includes:

if each TP in the first TP set fed back by any UE in each configuration set belongs to at least two second TP sets, selecting a second TP set from the at least two second TP sets for CoMP transmission for the UE according to the SINR measured by the UE when CoMP transmission is performed on each second TP set in the at least two second TP sets, respectively.

In a second aspect, a method for selecting a transmission node participating in a coordinated multipoint, CoMP, transmission is provided, comprising:

user Equipment (UE) receives measurement information issued by network side equipment;

the UE carries out cell measurement based on the measurement information and determines a first TP set for CoMP transmission according to the measurement result;

and the UE feeds back the determined first TP set to the network side equipment, so that the network side equipment determines a second TP set participating in CoMP transmission for the UE according to the first TP set.

With reference to the second aspect, in a first possible implementation manner, after the feeding back, by the UE, the determined first TP set to the network side device, the method further includes:

and the UE receives the second TP set sent by the network side equipment.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the performing, by the UE, cell measurement based on the measurement information includes:

the UE performs reference signal received quality, RSRP, measurements based on cell-specific reference signals, CRS, or,

and performing RSRP measurement based on the CSI-RS.

With reference to the second aspect, or the first or second possible implementation manner of the second aspect, in a third possible implementation manner, the measurement information includes one or more of the following information:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

With reference to the second aspect or any one of the first to third possible implementation manners of the second aspect, in a fourth possible implementation manner, the performing, by the UE, cell measurement based on the measurement information further includes:

the UE carries out Channel Quality Indication (CQI) measurement;

the UE feeds back the determined first TP set to the network side device, including:

and the UE feeds back the determined first TP set and the CQI value of each TP in the first TP set to the network side equipment.

With reference to the second aspect or any one of the first to fourth possible implementation manners of the second aspect, in a fifth possible implementation manner, the determining, by the UE, a first TP set used for CoMP transmission according to the measurement result includes:

and the UE determines a first TP set for CoMP transmission according to the measurement result and the maximum number of TPs which can be selected and is determined based on the measurement information.

In a third aspect, an apparatus for selecting a transmission node participating in CoMP transmission is provided, comprising:

the transmitter is used for transmitting measurement information to User Equipment (UE) within the coverage range of network side equipment;

the receiver is used for receiving a first transmission node (TP) set which is fed back by each UE after cell measurement is carried out on the basis of the measurement information and is used for CoMP transmission, and transmitting the first TP set to the processor;

a processor configured to determine, for each UE, a second set of TPs to participate in CoMP transmission according to the first set of TPs received by the receiver.

With reference to the third aspect, in a first possible implementation manner, the processor is further configured to: dividing each covered UE into a plurality of configuration sets; the transmitter is specifically configured to: indicating the same measurement information for the UEs in the same configuration set;

the processor is specifically configured to:

and determining at least one second TP set participating in CoMP transmission for each configuration set according to the first TP set fed back by each UE in each configuration set.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner, the processor is specifically configured to:

dividing covered UEs into a plurality of geographical area sets, wherein each UE in each geographical area set can receive signals of at least one same TP; for each geographical area set, dividing each UE in the geographical area set into different SINR sets according to the SINR measured by each UE in the geographical area set, wherein each SINR set is used as one configuration set; wherein, different SINR sets respectively correspond to different SINR value ranges.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner, the measurement information includes one or more of the following information:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

With reference to the second or third possible implementation manner of the third aspect, in a fourth possible implementation manner, the processor is specifically configured to:

dividing each UE covered into a plurality of geographical area sets according to one or more of the following information:

path loss values measured by each UE for different TPs;

geographical location coordinate information of each UE.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner, the RSRP is an RSRP based on a cell-specific reference signal CRS, or an RSRP based on a channel state information reference signal CSI-RS.

With reference to any one of the first to fifth possible implementation manners of the third aspect, in a sixth possible implementation manner, the processor is specifically configured to:

for each configuration set, selecting each first TP set only including TPs within the coverage range of the network side equipment from the first TP sets fed back by each UE; screening out each TP meeting the conditions participating in CoMP transmission from each selected first TP set; and determining at least one second TP set participating in CoMP transmission for each configuration set according to each TP screened from each selected first TP set.

With reference to any one of the first to sixth possible implementation manners of the third aspect, in a seventh possible implementation manner, the processor is specifically configured to:

for each configuration set, selecting each first TP set of TPs outside the coverage range of the network side equipment from the first TP sets fed back by each UE; screening out each TP meeting the conditions participating in CoMP transmission from each selected first TP set through negotiation with adjacent network side equipment; and determining at least one second TP set participating in CoMP transmission for each configuration set according to each TP screened from each selected first TP set.

With reference to the sixth or seventh possible implementation manner of the third aspect, in an eighth possible implementation manner, the condition for participating in CoMP transmission includes one or more of the following conditions:

the load value is lower than a set load threshold value;

the return time delay is lower than the set time delay;

the channel quality indication CQI value is greater than the set CQI threshold.

With reference to the seventh possible implementation manner of the third aspect, in a ninth possible implementation manner, the processor is specifically configured to: interacting one or more of the following information with the adjacent network side equipment:

selecting a number of UEs for each TP in the first set of TPs;

backhaul link remaining capacity of each TP within the first set of TPs;

backhaul delays between TPs in the first set of TPs;

TPs that are not eligible to participate in CoMP transmission.

With reference to any one of the first to ninth possible implementation manners of the third aspect, in a tenth possible implementation manner, the processor is specifically configured to:

taking each divided third TP set as one second TP set; or,

With reference to any one of the first to tenth possible implementation manners of the third aspect, in an eleventh possible implementation manner, the processor is specifically configured to:

after determining at least two second TP sets participating in CoMP transmission for each configuration set, if each TP in a first TP set fed back by any UE in each configuration set belongs to at least two second TP sets, selecting one second TP set from the at least two second TP sets for CoMP transmission according to SINR measured by the UE when CoMP transmission is performed respectively by each second TP set in the at least two second TP sets.

In a fourth aspect, an apparatus for selecting a transmission node participating in a coordinated multipoint, CoMP, transmission is provided, comprising:

the receiver is used for receiving the measurement information issued by the network side equipment and transmitting the received measurement information to the processor;

the processor is used for carrying out cell measurement based on the measurement information and determining a first TP set used for CoMP transmission according to the measurement result;

a transmitter, configured to feed back the first TP set determined by the processor to the network side device, so that the network side device determines, according to the first TP set, a second TP set participating in CoMP transmission for a user equipment UE.

With reference to the fourth aspect, in a first possible implementation manner, the receiver is further configured to:

after the transmitter feeds the determined first set of TPs back to the network-side device, receiving the second set of TPs sent by the network-side device.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the processor is specifically configured to:

reference signal received quality, RSRP, measurements are made based on cell-specific reference signals, CRS, or,

and performing RSRP measurement based on the CSI-RS.

With reference to the fourth aspect, or the first or second possible implementation manner of the fourth aspect, in a third possible implementation manner, the measurement information includes one or more of the following information:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

With reference to the fourth aspect or any one of the first to third possible implementation manners of the fourth aspect, in a fourth possible implementation manner, the processor is specifically configured to: performing Channel Quality Indicator (CQI) measurement;

the transmitter is specifically configured to:

and feeding back the first TP set determined by the processor and the CQI value of each TP in the first TP set to the network side equipment.

With reference to the fourth aspect or any one of the first to fourth possible implementation manners of the fourth aspect, in a fifth possible implementation manner, the processor is specifically configured to:

determining a first TP set for CoMP transmission according to the measurement result and the maximum number of TPs which can be selected and is determined based on the measurement information.

In a fifth aspect, an apparatus for selecting a transmission node participating in CoMP transmission is provided, including:

the sending module is used for sending the measurement information to the user equipment UE within the coverage range of the network side equipment;

a receiving module, configured to receive a first transmission node TP set for CoMP transmission, which is fed back by each UE after cell measurement is performed based on the measurement information, and transmit the first TP set to a processing module;

and the processing module is used for determining a second TP set participating in CoMP transmission for each UE according to the first TP set received by the receiving module.

With reference to the fifth aspect, in a first possible implementation manner, the processing module is further configured to: dividing each covered UE into a plurality of configuration sets; the sending module is specifically configured to: indicating the same measurement information for the UEs in the same configuration set;

the processing module is specifically configured to:

With reference to the first possible implementation manner of the fifth aspect, in a second possible implementation manner, the processing module is specifically configured to:

With reference to the second possible implementation manner of the fifth aspect, in a third possible implementation manner, the measurement information includes one or more of the following information:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

With reference to the second or third possible implementation manner of the fifth aspect, in a fourth possible implementation manner, the processing module is specifically configured to:

path loss values measured by each UE for different TPs;

geographical location coordinate information of each UE.

With reference to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner, the RSRP is an RSRP based on a cell-specific reference signal CRS, or an RSRP based on a channel state information reference signal CSI-RS.

With reference to any one of the first to fifth possible implementation manners of the fifth aspect, in a sixth possible implementation manner, the processing module is specifically configured to:

With reference to any one of the first to sixth possible implementation manners of the fifth aspect, in a seventh possible implementation manner, the processing module is specifically configured to:

With reference to the sixth or seventh possible implementation manner of the fifth aspect, in an eighth possible implementation manner, the condition for participating in CoMP transmission includes one or more of the following conditions:

the load value is lower than a set load threshold value;

the return time delay is lower than the set time delay;

the channel quality indication CQI value is greater than the set CQI threshold.

With reference to the seventh possible implementation manner of the fifth aspect, in a ninth possible implementation manner, the processing module is specifically configured to: interacting one or more of the following information with the adjacent network side equipment:

selecting a number of UEs for each TP in the first set of TPs;

backhaul link remaining capacity of each TP within the first set of TPs;

backhaul delays between TPs in the first set of TPs;

TPs that are not eligible to participate in CoMP transmission.

With reference to any one of the first to ninth possible implementation manners of the fifth aspect, in a tenth possible implementation manner, the processing module is specifically configured to:

taking each divided third TP set as one second TP set; or,

With reference to any one of the first to tenth possible implementation manners of the fifth aspect, in an eleventh possible implementation manner, the processing module is specifically configured to

In a sixth aspect, an apparatus for selecting a transmission node participating in CoMP transmission is provided, comprising:

the receiving module is used for receiving the measurement information issued by the network side equipment and transmitting the received measurement information to the processing module;

a processing module, configured to perform cell measurement based on the measurement information, and determine a first TP set used for CoMP transmission according to a measurement result;

a sending module, configured to feed back the first TP set determined by the processing module to the network side device, so that the network side device determines, according to the first TP set, a second TP set participating in CoMP transmission for the user equipment UE.

With reference to the sixth aspect, in a first possible implementation manner, the receiving module is further configured to:

after the sending module feeds the determined first TP set back to the network side equipment, receiving the second TP set sent by the network side equipment.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the processing module is specifically configured to:

and performing RSRP measurement based on the CSI-RS.

With reference to the sixth aspect, or the first or second possible implementation manner of the sixth aspect, in a third possible implementation manner, the measurement information includes one or more of the following information:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

With reference to the sixth aspect or any one of the first to third possible implementation manners of the sixth aspect, in a fourth possible implementation manner, the processing module is specifically configured to: performing Channel Quality Indicator (CQI) measurement;

the sending module is specifically configured to:

and feeding back the first TP set determined by the processing module and the CQI value of each TP in the first TP set to the network side equipment.

With reference to the sixth aspect or any one of the first to fourth possible implementation manners of the sixth aspect, in a fifth possible implementation manner, the processing module is specifically configured to:

By adopting the scheme, the network side equipment issues the measurement information to the UE in the coverage area when configuring the TP participating in the CoMP transmission for the UE, so that the UE reports the TP set selected by the UE according to the measurement information without reporting various measurement results, and the feedback quantity of the measurement results can be greatly reduced. In addition, the network side device may refer to the first TP set reported by each UE, and allocate the second TP set to each UE as a whole, which may avoid allocating different TP sets to each UE, thereby effectively avoiding interference between different TP sets.

Drawings

FIG. 1 is a schematic diagram of a UDN scenario applied in an embodiment of the present application;

fig. 2 is a schematic diagram of a system structure for selecting a transmission node participating in CoMP transmission according to an embodiment of the present application;

fig. 3 is a flowchart of a method for selecting a transmission node participating in CoMP transmission according to an embodiment of the present application;

fig. 4 is a flowchart of a method for selecting a transmission node participating in CoMP transmission according to a second embodiment of the present application;

FIG. 5 is a schematic diagram of a partitioned set of geographic regions;

FIG. 6 is a diagram illustrating different SINR thresholds;

fig. 7 is a flowchart of an embodiment of determining a second set of TPs within the coverage of a macro base station;

fig. 8 is a flowchart of an embodiment of determining a second set of TPs within coverage of a different macro base station;

fig. 9 is a schematic structural diagram of an apparatus for selecting a transmission node participating in CoMP transmission according to a third embodiment of the present application;

fig. 10 is a schematic structural diagram of an apparatus for selecting a transmission node participating in CoMP transmission according to a fourth embodiment of the present application;

fig. 11 is a schematic structural diagram of a network-side device that selects a transmission node participating in CoMP transmission according to a fifth embodiment of the present application;

fig. 12 is a schematic structural diagram of a UE that selects a transmission node participating in CoMP transmission according to a sixth embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The basic idea of the embodiment of the application is as follows: and the network side equipment issues measurement information to the UE in the coverage area, the UE carries out cell measurement based on the measurement information, selects a first transmission node TP set for CoMP transmission based on the measurement result and feeds back the first transmission node TP set to the network side equipment, and the network side equipment selects a second TP set which finally participates in CoMP transmission for the UE according to the feedback result of the UE.

As shown in fig. 1, the embodiment of the present application can be applied to, but is not limited to, an Ultra-dense networking (UDN) scenario. By adopting the embodiment of the application, when the network side equipment needs to configure the TP participating in the CoMP transmission for the UE, the UE only needs to report the TP set selected by the UE, and does not need to report various measurement results, thereby greatly reducing the measurement feedback quantity. In addition, the network side device may comprehensively consider the first TP sets reported by each UE, allocate the second TP sets for each UE as a whole, and may effectively control interference between different second TP sets allocated for each UE.

As shown in fig. 2, a schematic diagram of a system structure for selecting a transmission node participating in CoMP transmission according to an embodiment of the present application includes:

the network side equipment 21 is configured to issue measurement information to User Equipment (UE) in a coverage area, receive a first TP set for CoMP transmission, which is fed back by each UE after cell measurement is performed based on the measurement information, and determine a second TP set participating in CoMP transmission for each UE according to the first TP set fed back by each UE;

the UE 22 is configured to receive measurement information sent by a network side device, perform cell measurement based on the measurement information, determine a first TP set used for CoMP transmission according to a measurement result, and feed back the determined first TP set to the network side device.

The network side device 21 in the embodiment of the present application may specifically be a macro base station or any other network side device having a cooperative control function and capable of communicating with each TP and UE. The TP in this embodiment may be various nodes that can provide signal coverage for the UE, such as a base station (e.g., various small stations such as a macro base station, a home base station, a micro base station, and a femto base station), a relay node, a Remote Radio Head (RRH), a Radio Remote Unit (RRU), an antenna port (antenna port), and the like. The UE in the embodiment of the present application may be any terminal device having a communication function.

The idea of the application will be further explained below by means of several specific examples.

Example one

As shown in fig. 3, a flowchart of a method for selecting a transmission node participating in CoMP transmission according to an embodiment of the present application includes:

s301: and the network side equipment issues the measurement information to the UE within the coverage range.

In this step, the network side device may indicate the measurement Information to the UE through a broadcast message, or a Radio Resource Control (RRC) signaling, or a Downlink Control Information (DCI) dedicated signaling. The maximum number of TPs that the UE can select for CoMP transmission may be indicated in the measurement information.

S302: and the UE receives the measurement information from the network side equipment, performs cell measurement based on the measurement information indicated by the network side equipment, and determines a first TP set for CoMP transmission according to the measurement result.

Here, the UE may measure Reference Signal Receiving Quality (RSRP), Channel Quality Indication (CQI), interference information, and the like, and select a first TP set for itself to be used for CoMP transmission based on the measurement result.

Four CoMP scenarios are introduced in 3GPP TR 36.819R 11, where scenarios 1-2 belong to a homogeneous network scenario, and in the homogeneous network scenario, different TPs adopt different Physical Cell Identifiers (PCIs). The scene 3 and the scene 4 belong to the heterogeneous network, and under the heterogeneous network, a plurality of other TPs (transmission power control) for improving signal coverage, such as various small stations, are deployed in the coverage area of a macro base station; in scenario 3, these TPs employ different PCIs than the macro base station. However, in scenario 4, these TPs share a Primary Synchronization Channel (PSS), a secondary Synchronization Channel (SSS), and a cell specific Reference signal (CRS) with the same PCI as that of the macro base station, in order to reduce frequent cell switching by the UE. However, before CoMP scenario 4 is introduced, the UE performs RSRP measurement based on Cell-specific reference signals (CRSs), and in CoMP scenario 4, since each TP in the coverage of the macro base station uses the same PCI, that is, the same CRS is used, the UE cannot distinguish each TP, and cannot perform RSRP measurement.

Based on this, the embodiment of the present application proposes: in CoMP scenarios 1-3, the UE performs reference signal received quality RSRP measurement based on a cell-specific reference signal CRS, and in CoMP scenario 4, the UE performs RSRP measurement based on a Channel State information reference signal (CSI-RS). Here, in CoMP scenario 4, CSI-RSs used by different TPs are different, and therefore RSRP measurement can be performed based on the CSI-RS of each TP.

S303: and the UE feeds the determined first TP set back to the network side equipment.

S304: the network side equipment receives the first TP set from the UE, and determines a second TP set participating in CoMP transmission for each UE according to the first TP set fed back by each UE.

Here, the network side device may count the number of UEs selecting each TP, and determine the same or different second TP sets participating in CoMP transmission for each UE according to the number of UEs selecting each TP. For example, there are three UEs, UE1, UE2, and UE3, where the first TP set fed back by UE1 is { TP1, TP2, TP3}, the first TP set fed back by UE2 is { TP1, TP2, TP3, TP4}, and the first TP set fed back by UE3 is { TP1, TP2, TP3, TP5}, and then a same second TP set of { TP1, TP2, TP3} may be determined for these three UEs.

In a specific implementation process, the network side device may feed back the second TP set determined for the UE to the UE, so that the UE performs CoMP transmission based on the second TP set. Or, the network side device does not feed back the second TP set to the UE, and at this time, the UE may default that the first TP set reported by the UE itself is the second TP set.

In this embodiment, when configuring a TP participating in CoMP transmission for a UE, a network side device issues measurement information to the UE in a coverage area, so that the UE reports a TP set selected by the UE according to the measurement information. And the network equipment allocates a second TP set for each UE integrally according to the first TP set reported by each UE, thereby avoiding allocating different TP sets for each UE and effectively avoiding the interference among different TP sets.

In order to better determine a suitable second TP set for the UE and reduce the number of the determined second TP sets, in the second embodiment, according to the characteristics of aggregation of UEs, the UEs are divided into multiple configuration sets, and the same measurement information is indicated for the UEs in the same configuration set.

Example two

As shown in fig. 4, a flowchart of a method for selecting a transmission node participating in CoMP transmission according to a second embodiment of the present application includes:

s401: and the network side equipment divides each covered UE into a plurality of configuration sets, indicates the same measurement information for the UE in the same configuration set and sends the measurement information.

In a specific implementation process, the network side device may divide UEs with close geographic locations and approximate received TP signals into the same configuration set according to the geographic location distribution of each UE and the coverage of each TP signal, and configure a measurement information for the configuration set. The specific manner of dividing the configuration set may be to roughly partition the UEs, roughly divide each UE into a plurality of geographical area sets, and then subdivide each geographical area set based on the SINR, for example:

network side equipment divides covered UE into a plurality of geographical area sets, wherein each UE in each geographical area set can receive signals of at least one same TP;

Here, the number of SINR sets may be dynamically adjusted according to the SINR value range measured by the user.

Next, the following division of the geographical area set and the SINR set are respectively described.

Firstly, dividing a geographical area set;

when the geographical area sets are divided, rough division may be performed based on geographical location characteristics of the UE aggregation, for example, each residential area in which the UE is centrally distributed is divided into each geographical area set.

For a geographical area where UE aggregation is not obvious, the division of the geographical area set may be performed in combination with a plurality of signal measurement information, for example, the division may be performed based on RSRP values of different TPs measured by each UE, path loss values measured by each UE for different TPs, geographical location coordinate information of each UE, and the like. For example, the network side device divides each covered UE into a plurality of geographical area sets according to the RSRP value, the path loss value, or the located geographical location information (e.g., three-dimensional geographical coordinate information or longitude and latitude coordinate information) measured by the UE, where the RSRP value measured by each UE in the same geographical area set for at least one same TP is greater than a set RSRP threshold value, or the path loss value measured for at least one same TP is less than a set path loss value, or a distance between the located geographical location and a TP (which may be a preset TP serving the geographical area set) corresponding to the located geographical area set is less than a set distance threshold value. It should be noted that, here, the RSRP value, the path loss value, the positioning geographical location information, or the like measured by the UE is a measurement result of the UE collected before the network side device determines that the TP set participating in CoMP transmission needs to be configured for the UE, and is not reported by the UE specifically for CoMP transmission.

As shown in FIG. 5, in CoMP scenario 4, the UE measures the CSI-RSRP of each TP, and for UEs 1-3, the measured TPs_AAnd TP_BMeasured TP, the CSI-RSRP of which is greater than a set RSRP threshold value Thr_CAnd TP_DIs less than or equal to Thr, the UEs 1-UE 3 can be classified as belonging to TPs_AAnd TP_BA set of geographical areas covered. Similarly, for UEs 4-8, the TP measured_AAnd TP_BMeasured TP of less than or equal to Thr_CAnd TP_DIf the CSI-RSRP is greater than Thr, the UEs 4-8 can be classified as belonging to TPs_CAnd TP_DA set of geographical areas covered.

Secondly, dividing an SINR set;

after the geographic area sets are divided, each geographic area set is divided based on SINR of UEAnd subdivided into individual SINR sets. As shown in fig. 6, when the SINR threshold measured by the UE is less thanWhen the CoMP transmission node is selected, dividing the UE into a first SINR set, wherein the maximum number of CoMP transmission nodes which can be selected by the UE in the first SINR set is N; when the SINR threshold measured by the UE is larger thanLess than SINR_thr1 When the CoMP transmission node is selected, the UE is divided into a second SINR set, and the maximum number of CoMP transmission nodes which can be selected by the UE in the second SINR set is N-M; when the SINR threshold measured by the UE is larger than the SINR_thr1And dividing the UE into a third SINR set, wherein the UE in the third SINR set does not need to perform CoMP transmission. It should be noted that, in the embodiments of the present application, the number of the divided SINR sets is not limited, and in a specific implementation, the number of the divided SINR sets may be determined according to a value range of the SINR measured by each UE.

After the SINR sets are divided and the measurement information of each SINR set is determined, the determined measurement information may be sent to each UE through a broadcast message or a dedicated signaling. The measurement information sent by the network side device may include one or more of the following information:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

S402: the UE receives the measurement information from the network side equipment, performs cell measurement based on the measurement information issued by the network side equipment, and determines a first TP set for CoMP transmission according to the measurement result.

In this step, the UE may measure RSRP, CQI, interference information, and the like of each TP, select a first TP set for CoMP transmission for itself based on a measurement result of the RSRP and the interference information and a maximum number of TPs that can be selected indicated by measurement information issued by the network side device, and feed back the selected first TP set and CQI information to the network side device, where the network side device may determine a second TP set for CoMP transmission for the UE based on the first TP set and the CQI information. In practical implementation, the UE may process the measured timely data by means of smoothing filtering, prediction, and the like, so that the processed data can reflect the received signal level of the UE more truly.

Here, the measurement information issued by the network side device may directly indicate the maximum number of TPs that can be selected by the UE for CoMP transmission, or may only indicate information such as an SINR set to which the UE belongs and/or a correspondence (which may be preset) between the SINR set and an SINR value range. For example, the UE may determine the SINR set based on the measured SINR and the corresponding relationship between the SINR set and the SINR value range, and determine the maximum number of TPs for CoMP transmission that can be selected based on the corresponding relationship between the SINR set and the maximum number of TPs. In addition, the UE may be notified of the geographical area set and SINR set to which the UE belongs, so as to indicate one or more of RSRP, path loss value, geographical location, threshold condition of SINR, and the like that each TP needs to satisfy when the UE selects the first TP set.

S403: and the UE feeds the determined first TP set back to the network side equipment.

In a specific implementation, each UE may report identification information (for example, for CoMP scenarios 1-3, the identification information may be a PCI, for CoMP scenario 4, the identification information may be a Virtual PCI (Virtual PCI, VPCI) corresponding to a CSI-RS, and in addition, other indexes, flags, and the like capable of distinguishing different TPs may be used as identification information of TPs) and CQI values of the TPs in the first TP set determined by each UE to the network side device (for example, a macro base station of the cell); specifically, feedback of measurement information may be performed through a (physical uplink Control Channel, PUCCH).

S404: the network side equipment receives a first TP set from UE, and determines at least one second TP set participating in CoMP transmission for each configuration set according to the first TP set fed back by each UE in each configuration set.

S405: and the network side equipment informs the UE of the determined second TP set.

In a specific implementation process, after obtaining a first TP set fed back by each UE, the network side device performs statistics on the number of UEs in each TP (that is, statistics on the number of votes of each UE in the SINR set obtained by each TP) for each SINR set, and may interactively select the number of UEs in each TP with an adjacent network side device (an adjacent macro base station) through an X2 interface, where the specific interactive information may be: PCI/VPCI of the selected TP and the number of UEs selecting TP corresponding to each PCI/VPCI. And the network side equipment selects various TPs with more votes, better channel conditions, lower load levels and larger residual capacity of the backhaul link from the first TP set to form a second TP set according to the first TP set, the load level of the TPs, the residual capacity of the backhaul link, the channel conditions between the UE and the TPs and the like fed back by the UE.

In a specific implementation process, if all TPs in the first TP set fed back by the UE are TPs within a coverage of the network side device, the network side device may directly determine the second TP set, as described in the following case one; if the TP in the first TP set fed back by the UE may also exist in the coverage of the neighboring network-side device in addition to the TP in the coverage of the network-side device, at this time, the network-side device may negotiate with the neighboring network-side device to determine a second TP set, as shown in the following case two.

The first condition is as follows:

the TPs in the first TP set fed back by the UE are all TPs in the coverage range of the network side equipment; the determining, by the network side device, at least one second TP set participating in CoMP transmission for each configuration set according to the first TP set fed back by each UE in each configuration set includes:

Case two:

the network side equipment determines at least one second TP set participating in CoMP transmission for each configuration set according to the first TP set fed back by each UE in each configuration set, and the method comprises the following steps:

Here, the negotiating between the network side device and the neighboring network side device may include:

selecting a number of UEs for each TP in the first set of TPs; in practical implementation, specifically, the identification information (such as PCI/VPCI, index and flag capable of distinguishing different TPs) of each TP in the first TP set and the number of UEs corresponding to each PCI/VPCI may be interacted;

backhaul link remaining capacity of each TP within the first set of TPs;

backhaul delays between TPs in the first set of TPs;

TPs that are not eligible to participate in CoMP transmission.

In both cases, the conditions for participating in CoMP transmission include one or more of the following conditions:

the load value is lower than a set load threshold value;

the return time delay is lower than the set time delay;

the channel quality indication CQI value is greater than the set CQI threshold.

In addition, in S404, there may be one or more second TP sets determined for each configuration set, which is specifically described as follows:

in a specific implementation, for each configuration set, if the selected TPs of the UEs are distributed centrally, the final second TP set may have only one TP. If the number of TPs selected by each UE is clearly divided into two subsets, for example, subsets a and B, and the number of UEs selecting TPs in a and B is less than 1/n of the number of UEs A, B, there may be two second sets of TPs, and similarly, there may also be three or more second sets of TPs.

Specifically, the determining, by the network side device, at least one second TP set participating in CoMP transmission for each configuration set according to a first TP set fed back by each UE in each configuration set includes:

taking each divided third TP set as one second TP set; or,

In S405, after determining at least one second TP set for each configuration set, the network side device may determine, in combination with the TP selected by each UE, the second TP set serving each UE in each configuration set, and notify the UE, so as to instruct the UE to perform CoMP transmission using the notified second TP set. In addition, the network side device may also notify the UE whose measured SINR value is greater than a certain set threshold value (for example, the UE in the third SINR set mentioned in the above division of the SINR set in S401) to perform conventional signal transmission, that is, not perform CoMP transmission. Specifically, the UE may be notified of the second set of TPs through broadcast signaling or dedicated signaling.

In a specific implementation, for any configuration set, if there is one determined second TP set, each TP in the determined second TP set is used for cooperation and communication with each UE in the configuration set is performed. If the determined second TP sets are multiple, determining to select the UE of the TP in each second TP set, and if the TP selected by the UE only belongs to one second TP set, adopting the second TP set to provide service for the UE; if the UE selects the TP in the at least two second TP sets, selecting one second TP set from the at least two second TP sets for the UE to perform CoMP transmission according to the SINR or the interference value measured by the UE when the CoMP transmission is performed on each second TP set in the at least two second TP sets. Such asFor the second TP sets A and B, the SINR measured by the UE is SINR respectively_AAnd SINR_BAnd SINR_A>SINR_BThen a second set of TPs a is selected to serve the UE. Similarly, if for the second TP sets a and B, the interference values measured by the UE are the interference value a and the interference value B, respectively, and the interference value a is<And selecting a second TP set A to provide service for the UE according to the interference value B.

In the following, for the above first and second cases, taking the network side device as a macro base station as an example, the implementation steps of the macro base station determining the second TP set are respectively introduced.

As shown in fig. 7, a flowchart of an embodiment of determining a second set of TPs within a coverage area of a macro base station includes the following steps:

s701: after receiving the first TP sets fed back by the UE in each configuration set, the macro base station selects each first TP set only including TPs in the coverage range of the macro base station from the first TP sets fed back by the UE for each configuration set;

s702: removing TPs which are not suitable for CoMP transmission from the selected first TP sets according to the load level, the residual capacity of a return link and the return delay of each TP;

here, the backhaul link remaining capacity refers to a remaining capacity of a backhaul link from a TP itself to a core network, or a remaining capacity of a backhaul link from a TP to a core network through an X2 interface with other TPs.

S703: screening out each TP of which the CQI value is greater than a set CQI threshold value from the rest TPs of each first TP set according to the CQI value of each TP reported by the UE; or sequentially screening out a preset number of TPs from the rest TPs of each first TP set according to the descending order of the CQI values.

S704: dividing the TP in each screened first TP set into N third TP sets aiming at each configuration set; in the N third TP sets, the number of the same UE served by any two third TP sets is less than 1/N of the number of the UE served by the two third TP sets respectively; wherein N is a positive integer greater than or equal to 2, and N is a natural number greater than or equal to 1;

s705: for each third TP set, selecting a set number of TPs from the third TP set as one second TP set according to the number of the UEs selecting each TP; wherein, the second TP set includes the network side device.

Here, a set number of TPs with the largest number of votes are sequentially selected from each third TP set in order of increasing the number of votes obtained for each TP.

S706: and determining one second TP set for each UE according to the at least one second TP set determined for each configuration set and the first TP set fed back by each UE in each configuration set.

That is, for any configuration set, if there is one determined second TP set, each TP in the determined second TP set is used for cooperation and communication with each UE in the configuration set is performed. If the determined second TP sets are multiple, confirming the second TP sets to which the TPs in the first TP set selected by the UE belong, and if the TP selected by the UE only belongs to one of the second TP sets, adopting the one second TP set to provide service for the UE; if the UE selects the TP in the at least two second TP sets, selecting one second TP set from the at least two second TP sets for the UE to perform CoMP transmission according to the signal-to-interference-plus-noise ratio (SINR) or the interference value measured by the UE when the CoMP transmission is performed on each second TP set in the at least two second TP sets.

S707: and the macro base station informs the UE of the second TP set determined for each UE, and is used for instructing the UE to perform CoMP transmission based on the second TP set.

As shown in fig. 8, a flowchart of an embodiment of determining a second set of TPs within coverage areas of different macro base stations includes the following steps:

s801: after receiving the first TP sets fed back by the UE in each configuration set, the macro base station selects each first TP set containing the TPs outside the coverage range of the macro base station from the first TP sets fed back by the UE for each configuration set.

Here, each first TP set selected by the macro base station may include TPs within its own coverage area and TPs under the coverage of other macro base stations outside its own coverage area.

S802: and the macro base station negotiates with an adjacent macro base station, and the TPs unsuitable for CoMP transmission are removed from the selected first TP sets according to the load level, the residual capacity of the backhaul link and the backhaul delay of each TP.

In specific implementation, the macro base station may interact with the adjacent macro base station about the load level, the backhaul link remaining capacity, the backhaul delay, and the like of each TP, or may directly interact with information of TPs unsuitable for CoMP transmission, which are confirmed by each macro base station.

S803: the macro base station screens out all TPs with CQI values larger than a set CQI threshold value from the rest TPs in all the first TP sets according to the CQI values of all the TPs reported by the UE; or sequentially screening out a preset number of TPs from the rest TPs of each first TP set according to the descending order of the CQI values.

S804: dividing the TP in each screened first TP set into N third TP sets aiming at each configuration set; in the N third TP sets, the number of the same UE served by any two third TP sets is less than 1/N of the number of the UE served by the two third TP sets respectively; wherein N is a positive integer greater than or equal to 2, and N is a natural number greater than or equal to 1;

s805: for each third TP set, selecting a set number of TPs from the third TP set as one second TP set according to the number of the UEs selecting each TP; wherein, the second TP set includes the network side device.

S806: and determining one second TP set for each UE according to the at least one second TP set determined for each configuration set and the first TP set fed back by each UE in each configuration set.

S807: and the macro base station informs the UE of the second TP set determined for each UE, and is used for instructing the UE to perform CoMP transmission based on the second TP set.

In this embodiment, the network side device divides the UE in its coverage area into a plurality of configuration sets, and determines a more appropriate TP set for each configuration set according to the condition of each configuration set, thereby improving communication efficiency.

EXAMPLE III

Fig. 9 is a schematic structural diagram of an apparatus for selecting a transmission node participating in CoMP transmission according to a third embodiment of the present application. The apparatus may be a network side device, such as a macro base station. The device can also be integrated with network side equipment as a functional module, and comprises:

the transmitting module 91 is configured to issue measurement information to the UE in the coverage area of the network side device;

a receiving module 92, configured to receive a first transmission node TP set for CoMP transmission fed back by each UE after performing cell measurement based on the measurement information, and transmit the first TP set to a processing module 93;

a processing module 93, configured to determine, for each UE, a second TP set participating in CoMP transmission according to the first TP set received by the receiving module 92.

Here, the processing steps of the transmitting module 91, the receiving module 92, and the processing module 93 for implementing the above functions are described in the first embodiment and the second embodiment with respect to the steps executed by the network side device, and are not described again here.

Optionally, the processing module 93 is further configured to: dividing each covered UE into a plurality of configuration sets; the transmitting module 91 is specifically configured to: indicating the same measurement information for the UEs in the same configuration set;

the processing module 93 is specifically configured to:

Optionally, the processing module 93 is specifically configured to:

Optionally, the measurement information includes one or more of the following information:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

Optionally, the processing module 93 is specifically configured to:

path loss values measured by each UE for different TPs;

geographical location coordinate information of each UE.

Optionally, the RSRP is an RSRP based on a cell-specific reference signal CRS, or an RSRP based on a channel state information reference signal CSI-RS.

Optionally, the processing module 93 is specifically configured to:

Optionally, the conditions participating in CoMP transmission include one or more of the following conditions:

the load value is lower than a set load threshold value;

the return time delay is lower than the set time delay;

the channel quality indication CQI value is greater than the set CQI threshold.

Optionally, the processing module 93 is specifically configured to: interacting one or more of the following information with the adjacent network side equipment:

selecting a number of UEs for each TP in the first set of TPs;

backhaul link remaining capacity of each TP within the first set of TPs;

backhaul delays between TPs in the first set of TPs;

TPs that are not eligible to participate in CoMP transmission.

Optionally, the processing module 93 is specifically configured to:

taking each divided third TP set as one second TP set; or,

Optionally, the processing module 93 is specifically configured to

Example four

As shown in fig. 10, a schematic structural diagram of an apparatus for selecting a transmission node participating in CoMP transmission according to a fourth embodiment of the present invention is provided, where the apparatus may be a user equipment UE, or may be integrated with the UE as a functional module, and includes:

the receiving module 101 is configured to receive measurement information sent by a network side device, and transmit the received measurement information to the processing module 102;

a processing module 102, configured to perform cell measurement based on the measurement information, and determine a first TP set used for CoMP transmission according to a measurement result;

a transmitting module 103, configured to feed back the first TP set determined by the processing module 102 to the network side device, so that the network side device determines, according to the first TP set, a second TP set participating in CoMP transmission for the user equipment UE.

Here, the processing steps of the receiving module 101, the processing module 102, and the transmitting module 103 for implementing the above functions are described in the first embodiment and the second embodiment with respect to the UE executing steps, and are not described again here.

Optionally, the receiving module 101 is further configured to:

after the transmitting module 103 feeds back the determined first TP set to the network side device, receiving the second TP set sent by the network side device.

Optionally, the processing module 102 is specifically configured to:

and performing RSRP measurement based on the CSI-RS.

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

Optionally, the processing module 102 is specifically configured to: performing Channel Quality Indicator (CQI) measurement;

the transmitting module 103 is specifically configured to:

and feeding back the first TP set determined by the processing module 102 and the CQI value of each TP in the first TP set to the network side device.

Optionally, the processing module 102 is specifically configured to:

EXAMPLE five

Fig. 11 shows a simplified schematic diagram of a possible design structure of the network-side device, which may be a base station, according to the above embodiments. The network device may include a memory 111, a transmitter 112, a receiver 113, a processor 114, and a bus 115, among others. Wherein the memory 111, transmitter 112, receiver 113, and processor 114 are communicatively coupled via a bus 115.

The Memory 111 may be a Read Only Memory (ROM), a static Memory device, a dynamic Memory device, or a Random Access Memory (RAM). The memory 111 may store an operating system and other application programs. When the technical solution provided by the embodiment of the present invention is implemented by software or firmware, a program code for implementing the technical solution provided by the embodiment of the present invention is stored in the memory 111 and executed by the processor 114.

The transmitter 112 and the receiver 113 are used for communication with other devices or communication networks (such as, but not limited to, ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), etc.).

The processor 114 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits, and is configured to execute related programs to implement the technical solutions provided by the embodiments of the present invention. The processor 114 may also be a Network Processor (NP). Or a combination of a CPU and an NP, or a combination of an NP and a hardware chip.

It should be noted that although the hardware shown in fig. 11 only shows the memory 111, the transmitter 112, the receiver 113, the processor 114 and the bus 115, in a specific implementation, it should be understood by those skilled in the art that the network side device also contains other components necessary for normal operation. Also, hardware components for performing other functions may be included, as would be apparent to one skilled in the art, according to particular needs.

As an example, the transmitter 112 is configured to support the network-side device to perform step S301 in the first embodiment shown in fig. 3, that is, issue measurement information to UEs within a coverage area.

The receiver 113 is configured to support the network side device to perform the step of receiving the first set of TPs from the UE in step S304 in the embodiment shown in fig. 3.

The processor 114 is coupled to the memory 111, the transmitter 112, and the receiver 113, and is configured to support the network-side device to perform the step of determining, according to the first TP set fed back by each UE, a second TP set participating in CoMP transmission for each UE in step S304 in the first embodiment shown in fig. 3.

Optionally, the processor 114 is further configured to support the network-side device to perform, in step S401 in the second embodiment shown in fig. 4, a step of dividing each UE in the coverage area of the network-side device into multiple configuration sets and indicating the same measurement information for the UEs in the same configuration set, and determine, in step S404 in the second embodiment shown in fig. 4, at least one second TP set participating in CoMP transmission for each configuration set according to the first TP set fed back by each UE in each configuration set.

The transmitter 112 is further configured to support the network-side device to perform the step S401 in the second embodiment shown in fig. 4 to send corresponding measurement information to the plurality of configuration sets, respectively.

For the specific implementation of the transmitter 112, the receiver 113 and the processor 114, reference is made to the first embodiment and the second embodiment, which are not described herein again.

EXAMPLE six

Fig. 12 shows a simplified schematic diagram of a possible involved structure of the user equipment UE involved in the above embodiment. The UE may include, among other things, a memory 121, a transmitter 122, a receiver 123, a processor 124, and a bus 125. Wherein the memory 121, transmitter 122, receiver 123, and processor 124 are communicatively coupled via a bus 125.

The Memory 121 may be a Read Only Memory (ROM), a static Memory device, a dynamic Memory device, or a Random Access Memory (RAM). The memory 121 may store an operating system and other application programs. When the technical solution provided by the embodiment of the present invention is implemented by software or firmware, a program code for implementing the technical solution provided by the embodiment of the present invention is stored in the memory 121 and executed by the processor 124.

The transmitter 122 and the receiver 123 are used for communication with other devices or communication networks (such as, but not limited to, ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), etc.).

The processor 124 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits, and is configured to execute related programs to implement the technical solutions provided by the embodiments of the present invention.

It should be noted that although the hardware depicted in fig. 12 only shows the memory 121, transmitter 122, receiver 123, processor 124 and bus 125, in a particular implementation, those skilled in the art will appreciate that the UE also contains other components necessary to achieve proper operation. Also, hardware components for performing other functions may be included, as would be apparent to one skilled in the art, according to particular needs.

As an example, the receiver 123 is configured to support the UE to perform the step of receiving the measurement information from the network side device in step S302 in the first embodiment shown in fig. 3.

The processor 124 is configured to support the UE to perform cell measurement based on measurement information indicated by the network side device in step S302 in the first embodiment shown in fig. 3, and determine a first TP set used for CoMP transmission according to the measurement result.

The transmitter 122 is configured to support the UE to perform the feedback of the determined first TP set to the network side device in step S303 in the first embodiment shown in fig. 3.

Optionally, the receiver 123 is further configured to support the UE to perform the step of receiving the measurement information from the network side device in step S402 in the second embodiment shown in fig. 4.

The processor 124 is further configured to support the UE to perform cell measurement based on the measurement information issued by the network side device in step S402 in the second embodiment shown in fig. 4, and determine the first TP set used for CoMP transmission according to the measurement result.

The transmitter 122 is configured to support the UE to perform the step S403 in the second embodiment shown in fig. 4 to feed back the determined first TP set to the network side device.

For the specific implementation of the transmitter 121, the receiver 123 and the processor 124, please refer to the first embodiment and the second embodiment, which will not be described herein.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A method of selecting a transmission node to participate in a coordinated multi-point, CoMP, transmission, the method comprising:

2. The method of claim 1, wherein the network side device issues measurement information to the UE in the coverage area, and the method includes:

3. The method of claim 2, wherein the network side device divides covered UEs into a plurality of configuration sets, and comprises:

4. The method of claim 3, wherein the measurement information comprises one or more of:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

5. The method according to claim 3 or 4, wherein the dividing, by the network side device, each UE covered into a plurality of geographical area sets comprises:

path loss values measured by each UE for different TPs;

geographical location coordinate information of each UE.

6. The method of claim 5, wherein the RSRP is a cell-specific reference signal (CRS) -based RSRP or a channel state information reference signal (CSI-RS) -based RSRP.

7. The method according to any of claims 2 to 6, wherein the determining, by the network side device, at least one second TP set participating in CoMP transmission for each configuration set according to the first TP set fed back by each UE in each configuration set includes:

8. The method according to any of claims 2 to 6, wherein the determining, by the network side device, at least one second TP set participating in CoMP transmission for each configuration set according to the first TP set fed back by each UE in each configuration set includes:

9. The method of claim 7 or 8, wherein the conditions for participating in CoMP transmission comprise one or more of the following conditions:

the load value is lower than a set load threshold value;

the return time delay is lower than the set time delay;

the channel quality indication CQI value is greater than the set CQI threshold.

10. The method of claim 8, wherein the network-side device negotiating with the neighboring network-side device comprises:

selecting a number of UEs for each TP in the first set of TPs;

backhaul link remaining capacity of each TP within the first set of TPs;

backhaul delays between TPs in the first set of TPs;

TPs that are not eligible to participate in CoMP transmission.

11. The method according to any one of claims 2 to 10, wherein the determining, by the network side device, at least one second TP set participating in CoMP transmission for each configuration set according to the first TP set fed back by each UE in each configuration set includes:

taking each divided third TP set as one second TP set; or,

12. The method according to any of claims 2 to 11, wherein for each configuration set, after the network side device determines at least two second TP sets participating in CoMP transmission for the each configuration set, the method further comprises:

13. A method of selecting a transmission node to participate in a coordinated multi-point, CoMP, transmission, the method comprising:

14. The method of claim 13, wherein after the UE feeds back the determined first set of TPs to the network-side device, further comprising:

and the UE receives the second TP set sent by the network side equipment.

15. The method of claim 13 or 14, wherein the UE performs cell measurements based on the measurement information, comprising:

and performing RSRP measurement based on the CSI-RS.

16. A method according to any of claims 13 to 15, wherein the measurement information includes one or more of the following:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

17. The method of any of claims 13 to 16, wherein the UE performs cell measurements based on the measurement information, further comprising:

the UE carries out Channel Quality Indication (CQI) measurement;

18. The method of any of claims 13 to 17, wherein the UE determining the first set of TPs for CoMP transmission based on the measurement results comprises:

19. An apparatus for selecting a transmission node to participate in a coordinated multipoint, CoMP, transmission, the apparatus comprising:

20. The apparatus of claim 19,

the processing module is further configured to: dividing each covered UE into a plurality of configuration sets; the sending module is specifically configured to: indicating the same measurement information for the UEs in the same configuration set;

the processing module is specifically configured to:

21. The apparatus of claim 20, wherein the processing module is specifically configured to:

22. The apparatus of claim 21, wherein the measurement information comprises one or more of:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

23. The apparatus of claim 21 or 22, wherein the processing module is specifically configured to:

path loss values measured by each UE for different TPs;

geographical location coordinate information of each UE.

24. The apparatus of claim 23, wherein the RSRP is a cell-specific reference signal, CRS, based RSRP or a channel state information reference signal, CSI-RS, based RSRP.

25. The apparatus of any one of claims 20 to 24, wherein the processing module is specifically configured to:

26. The apparatus of any one of claims 20 to 24, wherein the processing module is specifically configured to:

27. The apparatus of claim 25 or 26, wherein the conditions for participating in CoMP transmissions comprise one or more of:

the load value is lower than a set load threshold value;

the return time delay is lower than the set time delay;

the channel quality indication CQI value is greater than the set CQI threshold.

28. The apparatus of claim 26, wherein the processing module is specifically configured to: interacting one or more of the following information with the adjacent network side equipment:

selecting a number of UEs for each TP in the first set of TPs;

backhaul link remaining capacity of each TP within the first set of TPs;

backhaul delays between TPs in the first set of TPs;

TPs that are not eligible to participate in CoMP transmission.

29. The apparatus of any one of claims 20 to 28, wherein the processing module is specifically configured to:

taking each divided third TP set as one second TP set; or,

30. The apparatus of any one of claims 20 to 29, wherein the processing module is specifically configured to:

31. An apparatus for selecting a transmission node to participate in a coordinated multipoint, CoMP, transmission, the apparatus comprising:

32. The apparatus of claim 31, wherein the receiving module is further configured to:

33. The apparatus of claim 31 or 32, wherein the processing module is specifically configured to:

and performing RSRP measurement based on the CSI-RS.

34. An apparatus according to any of claims 31 to 33, wherein the measurement information includes one or more of:

information indicating a set of geographical areas to which the UE belongs;

information indicating a SINR set to which the UE belongs;

35. The apparatus of any one of claims 31 to 34, wherein the processing module is specifically configured to: performing Channel Quality Indicator (CQI) measurement;

the sending module is specifically configured to:

36. The apparatus of any one of claims 31 to 35, wherein the processing module is specifically configured to: