WO2016086407A1 - Terminal, network device and coordinated multi-point transmission cooperating set selection method - Google Patents

Abstract

The present application relates to the technical field of wireless communications, and in particular to a terminal, a network device and a coordinated multi-point transmission (CoMP) cooperating set selection method, which are used for decreasing the processing load of the network device in the process of selecting a CoMP cooperating set. In a terminal provided by the embodiments of the present invention, a processing module is used for respectively performing downlink measurement on each node of multiple nodes in a coordinated multi-point transmission (CoMP) candidates set of a terminal; and a transceiving module is used for sending a downlink measurement result obtained by the downlink measurement performed by the processing module to a network device, so as to be taken as a basis for the network device to select a CoMP cooperating set of the terminal from the CoMP candidates set of the terminal. Since the measurement is preformed by a terminal when CoMP cooperating set selection is performed, a network device selects a CoMP cooperating set according to a measurement result sent by the terminal, which decreases the processing load of the network device.

Description

Terminal, network device and cooperative multi-point transmission cooperation set selection method Technical field

The present application relates to the field of wireless communications technologies, and in particular, to a terminal, a network device, and a coordinated multipoint transmission cooperation set selection method.

Background technique

Coordinated Multi-Point Transmission/Reception (CoMP) is one of the key technologies in wireless communication systems. It can be used to improve the average throughput of the system and improve the performance of cell edge users. CoMP includes: Uplink (UL) CoMP and Down (DL) CoMP.

For UL CoMP, CoMP gain can be obtained by multi-node coordinated scheduling to avoid interference or by joint reception. For DL CoMP, multi-node coordination or joint transmission (including selective transmission) can be used to obtain CoMP gain and improve downlink performance. The plurality of nodes participating in the CoMP may include transceivers of different cells of the same base station, such as a radio remote unit (RRU), and may also include transceivers of different cells of different base stations, and may also A transceiver corresponding to different wireless coverages of the same cell is included.

Among them, for one terminal, a set of nodes that can participate in CoMP collaboration is called: a candidate set (CoMP candidates set); a set of nodes that perform CoMP collaboration is called a CoMP cooperating set. Generally, a network device, such as a base station, selects some or all of the nodes from the candidate set as a cooperative set according to the result of the wireless measurement to achieve a larger CoMP cooperation gain. Then, how to select a collaboration set from a candidate set is critical to achieving a large CoMP gain.

At present, when selecting a cooperative set, the network device generally measures the signal or the uplink channel transmitted by the terminal, and selects multiple or one nodes with better uplink signal strength or uplink channel quality from the candidate set for joint reception or joint according to the measurement result. send.

For example, in a Long Term Evolution (LTE) system, a network device controls, for example, a sounding reference signal (Sounding) sent by each node to a User Equipment (UE). Reference Signal) or Demodulated Reference CHannle (DMRS), Reference Signal Reference Power (RSRP) or Signal to Interference and Noise Ratio (SINR). The network device selects the CoMP collaboration set of the UE according to the result of the above measurement.

The network device selects a CoMP collaboration set of the terminal, and the network device usually needs to select a CoMP collaboration set for multiple terminals, and needs to control, for each terminal, an uplink channel sent by each node of the terminal in the CoMP candidate set to the terminal or The signal is measured, and the CoMP cooperative set of the terminal is selected according to the measurement result, and the processing load measured by the base station is high, especially when the number of nodes in the candidate set is large, the processing load is very high.

Summary of the invention

The embodiments of the present invention provide a terminal, a network device, and a CoMP collaboration set selection method, which are used to reduce the processing load of the network device in selecting a CoMP collaboration set.

In a first aspect, an embodiment of the present invention provides a terminal, including:

a processing module, configured to perform downlink measurement on each of the multiple nodes in the coordinated multi-point transmission CoMP candidate set of the terminal;

And a transceiver module, configured to send the downlink measurement result obtained by the downlink measurement performed by the processing module to the network device, as a basis for the network device to select a CoMP collaboration set of the terminal from a CoMP candidate set of the terminal.

In conjunction with the first aspect, in a first possible implementation, the transceiver module is further configured to:

Before the processing module performs the downlink measurement, receiving measurement configuration information from the network device, where the measurement configuration information includes configuration information of a downlink reference signal sent by each of the multiple nodes;

Receiving, by each node, the downlink reference signal sent by the node according to the configuration information of the node.

The processing module is specifically configured to perform the downlink measurement on the downlink reference signal sent by each of the multiple nodes.

With reference to the first possible implementation of the first aspect, in a second possible implementation, the measurement configuration information includes:

Information about physical resources occupied by the downlink reference signal sent by each of the plurality of nodes;

The physical resources occupied by the downlink reference signal sent by each of the multiple nodes are satisfied:

The downlink reference signals sent by different ones of the multiple nodes occupy different physical resources.

With reference to the second possible implementation of the first aspect, in a third possible implementation, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

On the physical resources of the downlink reference signal transmitted by one of the plurality of nodes, the other nodes of the plurality of nodes do not transmit signals.

With reference to the second possible implementation of the first aspect, or the third possible implementation of the first aspect, in a fourth possible implementation, the The physical resources occupied by the downlink reference signal also satisfy:

The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.

With reference to any one of the first possible implementation to the fourth possible implementation of the first aspect, in a fifth possible implementation, the terminal and the multiple nodes are based on long term evolution LTE protocol communication;

If the terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.

With reference to any one of the first possible implementation to the fourth possible implementation of the first aspect, in a sixth possible implementation, the terminal and the multiple nodes are based on long term evolution LTE protocol communication;

If the multiple nodes belong to different cells, and the terminal supports multiple CSI-Process measurements, The downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS;

If the multiple nodes belong to different cells, and the terminal does not support multiple CSI-Process measurements, the downlink reference signal is a cell-specific reference signal CRS.

In a second aspect, an embodiment of the present invention provides a network device, including:

a transceiver module, configured to receive a downlink measurement result sent by the first terminal, where the downlink measurement result is that each of the multiple nodes included in the coordinated multi-point transmission CoMP candidate set of the first terminal to the first terminal Obtained by downlink measurement separately;

And a processing module, configured to select, according to the downlink measurement result received by the transceiver module, a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal.

With reference to the second aspect, in a first possible implementation manner, the transceiver module is further configured to: before receiving the downlink measurement result, send measurement configuration information to the first terminal, where the measurement configuration information includes Configuration information of a downlink reference signal sent by each of the plurality of nodes;

The downlink measurement result is that the first terminal separately measures the downlink reference signal sent by each of the multiple nodes.

With reference to the first possible implementation of the second aspect, in a second possible implementation, the measurement configuration information includes:

Information about physical resources occupied by the downlink reference signal sent by each of the plurality of nodes;

The physical resources occupied by the downlink reference signal sent by each of the multiple nodes are satisfied:

The downlink reference signals sent by different ones of the multiple nodes occupy different physical resources.

With reference to the second possible implementation of the second aspect, in a third possible implementation, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

And on a physical resource of a downlink reference signal sent by one of the plurality of nodes, Other nodes in multiple nodes do not send signals.

With reference to the second possible implementation manner of the second aspect, or the third possible implementation manner, in a fourth possible implementation manner, the downlink reference signal that is sent by each of the multiple nodes is occupied by the downlink reference signal. The physical resources also satisfy:

The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.

With reference to any one of the first possible implementation to the fourth possible implementation of the second aspect, in a fifth possible implementation, the first terminal and the multiple Long-term evolution of LTE protocol communication;

If the first terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.

With reference to any one of the first possible implementation to the fourth possible implementation of the second aspect, in a sixth possible implementation, the first terminal and the multiple Long-term evolution of LTE protocol communication;

If the multiple nodes belong to different cells, and the first terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS;

If the multiple nodes belong to different cells, and the first terminal does not support multiple CSI-Process measurements, the downlink reference signal is a cell-specific reference signal CRS.

With reference to the second aspect, in a seventh possible implementation, the multiple nodes are part of a CoMP candidate set of the first terminal;

The processing module is further configured to: before selecting the CoMP collaboration set of the first terminal, further comprising: controlling each node of the CoMP candidate set of the first terminal except the plurality of nodes Performing uplink measurement on the first terminal;

The processing module is specifically configured to: according to the received downlink measurement result, and the uplink measurement result of the uplink measurement performed by each node of the other node, the CoMP from the first terminal In the candidate set, the CoMP collaboration set of the first terminal is selected.

With reference to the second aspect, in an eighth possible implementation, the processing module is further configured to:

Selecting, according to an uplink measurement result of performing uplink measurement on the second terminal by each of the multiple nodes in the CoMP candidate set of the second terminal, selecting a CoMP collaboration set of the second terminal from the CoMP candidate set of the second terminal .

In conjunction with the eighth possible implementation of the second aspect, in a ninth possible implementation, the processing module is further configured to: before selecting the CoMP collaboration set of the second terminal,

Determining, according to whether the first terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the first terminal, determining, according to the downlink measurement result sent by the first terminal, Selecting a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal; and

Determining, according to whether the second terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the second terminal, determining that multiple nodes in the CoMP candidate set according to the second terminal are required Each of the nodes performs the uplink measurement result of the uplink measurement on the second terminal, and selects a CoMP collaboration set of the second terminal from a CoMP candidate set of the second terminal.

With the eighth possible implementation of the second aspect, in a tenth possible implementation, the processing module is further configured to: when the processing load of the current network device is greater than a preset processing load threshold, determine

And selecting, according to the downlink measurement result sent by the first terminal, a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal.

In a third aspect, an embodiment of the present invention provides a cooperative multi-point transmission CoMP collaboration set selection method, including:

Performing downlink measurement on each of the plurality of nodes included in the CoMP candidate set of the current terminal;

And transmitting the downlink measurement result obtained by the downlink measurement to the network device, as a basis for the network device to select a CoMP collaboration set of the current terminal from a CoMP candidate set of the current terminal.

In combination with the third aspect, in the first possible implementation, before performing the downlink measurement, Also includes:

Receiving measurement configuration information from the network device, the measurement configuration information including configuration information of a downlink reference signal transmitted by each of the plurality of nodes;

Receiving, by each node, the downlink reference signal sent by the node according to the configuration information of the node.

Performing downlink measurement on each of the multiple nodes in the current terminal's CoMP candidate set, including:

Performing the downlink measurement on the downlink reference signals sent by each of the multiple nodes.

With reference to the first possible implementation of the third aspect, in a second possible implementation, the measurement configuration information includes:

Information about physical resources occupied by the downlink reference signal sent by each of the plurality of nodes;

The physical resources occupied by the downlink reference signal sent by each of the multiple nodes are satisfied:

The downlink reference signals sent by different ones of the multiple nodes occupy different physical resources.

With reference to the second possible implementation of the third aspect, in a third possible implementation, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

On the physical resources of the downlink reference signal transmitted by one of the plurality of nodes, the other nodes of the plurality of nodes do not transmit signals.

With reference to the second possible implementation of the third aspect, or the third possible implementation manner of the third aspect, in a fourth possible implementation, the The physical resources occupied by the downlink reference signal also satisfy:

The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.

With reference to any one of the first possible implementation to the fourth possible implementation of the third aspect, in a fifth possible implementation, the current terminal and the multiple nodes are based on a long term Evolved LTE protocol communication;

If the current terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.

With reference to any one of the first possible implementation to the fourth possible implementation of the third aspect, in a sixth possible implementation, the current terminal and the multiple Evolved LTE protocol communication;

If the multiple nodes belong to different cells, and the current terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS;

If the multiple nodes belong to different cells, and the current terminal does not support multiple CSI-Process measurements, the downlink reference signal is a cell-specific reference signal CRS.

In a fourth aspect, an embodiment of the present invention provides a cooperative multi-point transmission CoMP collaboration set selection method, including:

Receiving a downlink measurement result sent by the first terminal, where the downlink measurement result is obtained by performing downlink measurement on each of the multiple nodes included in the CoMP candidate set of the first terminal by the first terminal;

And selecting, according to the received downlink measurement result, a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal.

With reference to the fourth aspect, in a first possible implementation, before receiving the downlink measurement result, the method further includes:

And transmitting, to the first terminal, measurement configuration information, where the measurement configuration information includes configuration information of a downlink reference signal sent by each of the multiple nodes.

The downlink measurement result is that the first terminal separately measures the downlink reference signal sent by each of the multiple nodes.

With reference to the first possible implementation of the fourth aspect, in a second possible implementation, the measurement configuration information includes:

Information about physical resources occupied by the downlink reference signal sent by each of the plurality of nodes;

The physical resources occupied by the downlink reference signal sent by each of the multiple nodes are satisfied:

The downlink reference signals sent by different ones of the multiple nodes occupy different physical resources.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

On the physical resources of the downlink reference signal transmitted by one of the plurality of nodes, the other nodes of the plurality of nodes do not transmit signals.

With reference to the second possible implementation manner of the fourth aspect, or the third possible implementation manner, in a fourth possible implementation manner, the downlink reference signal that is sent by each of the multiple nodes is occupied by the downlink reference signal. The physical resources also satisfy:

The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.

With reference to any one of the first possible implementation to the fourth possible implementation of the fourth aspect, in a fifth possible implementation, the first terminal and the multiple Long-term evolution of LTE protocol communication;

If the first terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.

With reference to any one of the first possible implementation to the fourth possible implementation of the fourth aspect, in a sixth possible implementation, the first terminal and the multiple Long-term evolution of LTE protocol communication;

If the multiple nodes belong to different cells, and the first terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS; Different cells, and the first terminal does not support multiple CSI-Process measurements, Then, the downlink reference signal is a cell-specific reference signal CRS.

With reference to the fourth aspect, in a seventh possible implementation, the multiple nodes are part of a CoMP candidate set of the first terminal;

Before selecting the CoMP collaboration set of the first terminal, the method further includes: controlling each of the other nodes except the plurality of nodes in the CoMP candidate set of the first terminal, and performing the first terminal on the first terminal Uplink measurement

Selecting the CoMP collaboration set of the first terminal, including: performing, according to the received downlink measurement result, an uplink measurement result of the uplink measurement performed by each node of the other node on the first terminal, The CoMP candidate set of the first terminal selects a CoMP collaboration set of the first terminal.

With reference to the fourth aspect, in an eighth possible implementation manner, the method further includes:

Selecting, according to an uplink measurement result of performing uplink measurement on the second terminal by each of the multiple nodes in the CoMP candidate set of the second terminal, selecting a CoMP collaboration set of the second terminal from the CoMP candidate set of the second terminal .

In conjunction with the eighth possible implementation of the fourth aspect, in a ninth possible implementation, before selecting the CoMP collaboration set of the second terminal, the method further includes:

Determining, according to whether the first terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the first terminal, determining, according to the downlink measurement result sent by the first terminal, Selecting a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal; and

Determining, according to whether the second terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the second terminal, determining that multiple nodes in the CoMP candidate set according to the second terminal are required Each of the nodes performs the uplink measurement result of the uplink measurement on the second terminal, and selects a CoMP collaboration set of the second terminal from a CoMP candidate set of the second terminal.

With reference to the eighth possible implementation manner of the foregoing aspect, in a tenth possible implementation manner, when the processing load of the current network device is greater than a preset processing load threshold, determining

And selecting, according to the downlink measurement result sent by the first terminal, a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal.

In summary, the terminal, the network device, and the CoMP cooperative set selection method provided by the embodiment of the present invention, when the CoMP collaboration set is selected, the measurement is performed by the terminal, and the network device selects the CoMP collaboration set according to the measurement result sent by the terminal, thereby reducing the network. The processing load of the device.

DRAWINGS

1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention;

2A is a schematic diagram of a UE performing multi-process CSI-Process measurement in Example 2;

2B is a schematic diagram of an RB pattern of a downlink signal sent by RRU1 in Example 2;

2C is a schematic diagram of an RB pattern of a downlink signal sent by RRU2 in Example 2;

2D is a schematic diagram of an RB pattern of a downlink signal received by a UE in Example 2;

3 is a schematic diagram of a network device in Example 3 selecting uplink or downlink measurements according to its own load;

Figure 4 is a flow chart of Example 3;

Figure 5 is a sub-flow chart of step S401 in the third example;

Figure 6 is a flow chart of Example 4;

FIG. 7 is a schematic structural diagram of a first terminal according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a second terminal according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a first network device according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a second network device according to an embodiment of the present disclosure;

FIG. 11 is a flowchart of a method for selecting a first CoMP collaboration set according to an embodiment of the present invention;

FIG. 12 is a flowchart of a second CoMP collaboration set selection method according to an embodiment of the present invention.

detailed description

The embodiments of the present invention provide a terminal, a network device, and a CoMP collaboration set selection method, which are used to reduce the processing load of the network device in selecting a CoMP collaboration set. In the terminal provided by the embodiment of the present invention, the processing module divides each node of the multiple nodes in the CoMP candidate set of the terminal into The downlink measurement result obtained by the downlink measurement of the processing module is sent to the network device as a basis for the network device to select the CoMP collaboration set of the terminal from the CoMP candidate set of the terminal. The measurement is performed by the terminal, and the network device selects the CoMP collaboration set according to the measurement result sent by the terminal, thereby reducing the processing load of the network device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, the wireless communication system provided by the embodiment of the present invention is introduced, and then the terminal and the network device provided by the embodiment of the present invention are introduced respectively. Finally, the CoMP collaboration set selection method provided by the embodiment of the present invention is introduced.

FIG. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention. As shown in FIG. 1, the system includes: a terminal 101 and a network device 102; wherein

The terminal 101 is configured to perform downlink measurement on each of the multiple nodes in the CoMP candidate set, and send the downlink measurement result obtained by the downlink measurement to the network device 102.

The network device 102 is configured to receive the downlink measurement result sent by the terminal 101, and select the CoMP collaboration set of the terminal 101 from the CoMP candidate set of the terminal 101 according to the received downlink measurement result.

The protocol on which the terminal 101 communicates with each node includes, but is not limited to, the following multiple communication protocols: Global System of Mobile communication (GSM), Code Division Multiple Access (CDMA) IS-95, Code Division Multiple Access (CDMA) 2000, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Wideband Code Division Multiple Access (Wideband Code Division Multiple Access) , WCDMA), LTE, Long Term Evolution-Advanced (LTE-advanced), Personal Handy-phone System (PHS).

The network device 102 can be a base station, a base station controller, or the like. For example, when the terminal 101 communicates with each node based on the LTE or LTE-advanced protocol, the network device 102 may be an evolved node (eNB) or a baseband unit (BBU) in the eNB. At this time, each node is an RRU; when the terminal 101 communicates with each node based on the GSM protocol, the network device 102 can be a base station controller (BSC), and each node can be a base transceiver station (Base). Transceiver Station, BTS); when terminal 101 and each node When the communication is based on TD-SCDMA or WCDMA, the network device 102 may be a Radio Network Controller (RNC), and each node may be a Node B.

Optionally, the plurality of nodes for which the terminal 101 performs the downlink measurement may be all nodes in the CoMP candidate set of the terminal 101, or may be partial nodes.

Optionally, the terminal 101 performs downlink measurement on the downlink reference signal sent by each of the multiple nodes in the CoMP candidate set, and the measurement quantity may be RSRP or SINR.

Take RSRP as an example, the SINR is the same. After performing downlink measurement on the downlink reference signal sent by each of the foregoing nodes, the terminal 101 sends a downlink measurement result to the network device 102, where the RSRP value of the downlink reference signal transmitted by the node measured by the terminal 101 is included; The RSRP value of each node that arrives is selected from the CoMP candidate set of the terminal 101.

Specifically, the CoMP collaboration set can be selected in the following manner:

It is assumed that the RSRP value measured by the terminal 101 received by the network device 102 for the serving node of the terminal 101 is RSRP_s_dl, and the received terminal 101 measures the RSRP value RSRP_candidate_dl for a node in the CoMP candidate set, if RSRP_candidate_dl-RSRP_s_dl≥P_Thr_dl, The network device 102 then selects the node to enter the CoMP collaboration set of the terminal 101. Among them, P_Thr_dl can be preset, for example, it can be a value in the range of (-10dB, 0dB). The serving node may be the node with the strongest signal strength of the receiving or transmitting terminal 101, and the serving node may change according to the change of the CoMP cooperation set.

Alternatively, the network device 102 may sort the RSRP values measured by the received terminal 101 for the plurality of nodes in the CoMP candidate set, and select N nodes with the largest RSRP value to form a CoMP cooperating set.

Optionally, the network device 102 may send the measurement configuration information to the terminal 101 before the terminal 101 performs downlink measurement, where the measurement configuration information includes a configuration of a downlink reference signal sent by each of the plurality of nodes in the cooperation group of the terminal 101. information.

Optionally, the measurement configuration information includes: information about a physical resource occupied by a downlink reference signal sent by each of the multiple nodes, such as a frequency, a time slot, a codeword, a symbol, and an antenna port. Number and other information.

Optionally, if the terminal 101 communicates with each node based on the Long Term Evolution (LTE) protocol, the information about the physical resource occupied by the downlink reference signal may be the information of the time-frequency resource occupied by the downlink reference signal, that is, the resource. Information about the Element (Resource Element, RE).

Optionally, in order to enable the terminal 101 to accurately measure the downlink reference signal sent by each node, the downlink reference signal sent by each of the multiple nodes occupies different physical resources, so that the terminal 101 can accurately distinguish different node transmissions. Downlink reference signal.

The downlink reference signal sent by different nodes of the multiple nodes may occupy the same physical resources in time and frequency according to the code division multiplexing manner. In this case, the autocorrelation property and the cross-correlation property are better. The codeword improves the accuracy of the measurement result of the terminal 101 measuring the downlink reference signal of each node.

Further, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes further satisfy the following condition 1:

On the physical resource of the downlink reference signal sent by one of the multiple nodes, the other nodes of the multiple nodes do not send a signal (no transimission), so as to avoid the downlink sent by the signal sent by one node to other nodes. Interference caused by the reference signal.

Further, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes may also satisfy the following condition two:

The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.

Optionally, if the terminal 101 communicates with the foregoing multiple nodes based on the LTE protocol, the downlink reference signals sent by the multiple nodes may include: a cell-specific reference signal (CRS), and a channel state indication reference signal. (Channel State Indication-Reference Signal, CSI-RS) and the like.

For example, if the multiple nodes belong to different cells, and the terminal 101 does not support multiple CSI-Process measurements, the downlink reference signal may be a CRS.

For another example: if the plurality of nodes belong to different cells, and the terminal 101 supports multiple CSI-Process For measurement, the downlink reference signal may be a CRS or a Signal Measurement Resource (SMR) signal in the CSI-RS.

The following takes Example 1 and Example 2 as an example to specifically describe a scheme in which a node sends a downlink reference signal.

In the above, the scheme in which the network device 102 selects the CoMP cooperative set of the terminal 101 according to the downlink measurement result, and the scheme in which each node transmits the downlink reference signal is introduced. In the following, an alternative to the network device 102 to determine the measurement mode is described.

As described above, when each node communicates with the terminal based on the LTE protocol, the current network device usually transmits an uplink channel/signal such as PRACH, PUCCH, SRS, or DMRS by controlling each node in the CoMP candidate set, according to the uplink measurement. The measurement result selects the CoMP collaboration set of the terminal, and the network device realizes high complexity.

In an embodiment of the present invention, an optional solution is: the network device 102 selects some terminals of the multiple terminals to perform uplink measurement, and the other terminals perform downlink measurement to select the CoMP collaboration set of the terminals. For the specific solution, refer to the following example 3. .

Another alternative is that the network device 102 selects a part of the terminal to perform uplink and downlink joint measurement, that is, for a plurality of nodes in the CoMP candidate set of the terminal, some nodes adopt uplink measurement, and some nodes adopt downlink measurement, and for the terminal, The network device 102 selects the CoMP collaboration set in conjunction with the results of the uplink measurements and the results of the downlink measurements. For details, see Example 4 below. Optionally, for the solution, the network device 102 may select to use uplink measurement or downlink measurement for other terminals than the uplink and downlink joint measurement.

Example one

Example 1 uses LTE Rel-10 and subsequent versions as an example to illustrate an alternative scheme for transmitting a downlink reference signal.

For LTE Rel-10 and subsequent releases, the UE supports CSI-RS measurements. It is considered that the reference signal sequence of the CSI-RS itself is bound to a Physical Cell ID (PCI). Therefore, for a case where a cell includes multiple RRUs, in order to enable the UE to distinguish downlink reference signals transmitted by different RRUs of the same cell, optionally, each RRU transmits a non-zero power channel state indication reference signal in a time division manner (None Zero Power Channel State Indication-Reference Signal, NZP CSI-RS), that is, the same RRU of the PCI transmits the NZP CSI-RS on different subframes, and the UE measures the RSRP or SINR at different times and reports it.

Optionally, to improve measurement accuracy, a Zero Power Channel State Indication-Reference Signal (ZP CSI-RS) may be configured on the neighboring RRU to prevent the measured NZP CSI-RS from being subjected to the adjacent RRU. Physical Downlink Shared CHannel (PDSCH) interference.

Example two

For the LTE Rel-11 and subsequent protocol versions, the downlink reference signal can be configured in the manner of the second method to perform downlink measurement.

For LTE Rel-11 and subsequent versions, the UE supports multiple CSI-RS measurement processes CSI-Process (CSI-Process). CSI-process consists of a Signal Measurement Resource (SMR) and an Interference Measurement Resource (IMR). The SMR is configured through the NZP CSI-RS, and the IMR is configured through the ZP CSI-RS. .

Generally, the UE measures interference and noise power on the IMR, and measures channel state (CQI/PMI/RI) on the SMR, where the CQI is a Channel Quality Indicator and the PMI is a Precoding Matrix Index. , RI is a Rank Indicator. Each CSI-process can be configured independently, including but not limited to the SMR and IMR period, offset, pilot pattern, and the period, type, and channel of the UE reporting feedback, such as: Physical Uplink Control CHannel (PUCCH) ) or physical uplink shared channel (Physical Uplink Shared CHannel, PUSCH).

Referring to FIG. 2A, FIG. 2B, FIG. 2C, and FIG. 2D, in the second example, the CoMP candidate set of the UE includes two nodes, RRU1 and RRU2, and the UE measures and reports the downlink reference signal SMR, and the base station selects according to the measurement result reported by the UE. CoMP collaboration set.

In the second example, in order to ensure the accuracy of the measurement result of the UE, the physical resources occupied by the downlink reference signal SMR sent by the RRU1 and the RRU2 satisfy the foregoing condition 1 and condition 2, and the specific description is as follows:

Referring to FIG. 2A, the UE is configured with two CSI-process: CSI process #1 and CSI process #2, and measures channel states of RRU1 and RRU2 (both of which measure 2 ports). Two For the CSI-process configuration, refer to FIG. 2B, FIG. 2C and FIG. 2D. FIG. 2B is a (Resource Block, RB) pattern of the downlink signal sent by the RRU1, and FIG. 2C is an RB pattern of the downlink signal sent by the RRU2. It can be seen from FIG. 2B and FIG. 2C that each RRU is configured with one SMR (including 2 REs) and two ZP CSI-RSs. One of the two ZP CSI-RSs is an IMR, including 4 REs, and the other is a PDSCH. Muting, including 4 REs, to avoid interference with the SMR of the neighboring RRU. For example, RRU2 does not send a signal on the RE occupied by the SMR sent by RRU1; RRU1 is occupied by the SMR occupied by the RRU2. If the signal is not transmitted, the above condition one is satisfied.

2D is an RB pattern of a downlink signal received by the UE. As can be seen from FIG. 2D, the downlink signal received by the UE includes two SMRs and one IMR.

As can be seen from FIG. 2B to FIG. 2D, RRU1 and RRU2 share the IMR, so that the downlink reference signal for measuring interference and/or noise is the sum of the physical resources occupied by the IMR, that is, the above condition 2 is satisfied.

So configured, the UE measures interference and noise power from RRU1 and RRU2 on the IMR, and then measures the channel state with RRU1 on the SMR of RRU1, for example, measuring RSRP/CQI/PMI/RI, etc., forming CSI The measurement result of -process#1 is reported to the base station in the feedback time slot of CSI-process#1. Similarly, the UE measures interference and noise power from RRU1 and RRU2 on the IMR, then measures the channel state with RRU2 on the SMR of RRU2, forming a measurement result of CSI-process#2, feedback at CSI-process2 The time slot is reported to the base station.

The base station can determine the channel state of the UE to the RRU1 and the channel state of the UE to the RRU2 according to the measurement results reported by the CSI-process #1 and the CSI-process #2, and select the CoMP cooperation set for the UE accordingly.

Similarly, for a scenario where the CoMP candidate set includes more than two nodes, the CSI-process can also be configured according to the foregoing condition 1 and condition 2, so as to achieve the purpose of avoiding interference and accurately measuring.

Optionally, when there are a large number of CoMP candidate central nodes, in order to decentralize the measurement and feedback load of the terminal, multiple CSI-process needs to be configured for the UE in a time division manner, and after a period of measurement feedback, the base station can master the UE. To the channel state of each RRU, you can It is better to select and maintain a CoMP collaboration set for the UE.

Example three

In the third example, the network device 102 selects some or all of the terminals for downlink measurement according to its own load, such as the load of the baseband board for performing baseband processing in the network device, etc., to select the CoMP cooperation set of these terminals.

Optionally, as shown in FIG. 3, the network device 102 may select all or part of the terminals to perform downlink measurement when the self load reaches or exceeds the first load threshold T1, and the other terminals perform uplink measurement; the self load is at or below When the second load threshold is T2, uplink measurement is performed for all terminals.

4 is a flow chart of Example 3. As shown in Figure 4, the process includes:

S401: The network device 102 selects some terminals to perform uplink measurement, and selects a CoMP collaboration set.

S402: The network device 102 selects another terminal to perform downlink measurement, and selects a CoMP collaboration set according to the measurement result reported by the terminal.

The execution of step S401 and step S402 is in no particular order. Step S402 specifically includes the following sub-steps:

S4021: The network device 102 controls multiple nodes in the candidate set of the terminal to send a downlink reference signal.

S4022: The network device 102 notifies the selected terminal to report the measurement result.

S4023: The network device 102 selects a CoMP collaboration set of the terminal according to the measurement result reported by the terminal.

Wherein, as shown in FIG. 5, step S401 may include the following sub-steps:

S501: The network device 102 controls the node in the CoMP candidate set of the terminal to perform uplink measurement on the terminal, for example, the measurement quantity is RSRP;

S502: The network device 102 performs CoMP cooperative set selection according to the RSRP value measured by each node.

If the network device 102 performs the CoMP cooperative set selection by using the uplink measurement, the network device 102 may perform the CoMP collaboration set selection in the following manner for each terminal including the terminal 101.

First, the network device 102 controls each node of a terminal's CoMP candidate set, The uplink channel or channel sent by the terminal, for example, SRS, DMRS, PUCCH, or PRACH, performs RSRP measurement; and the network device 102 performs CoMP cooperative set selection according to the RSRP value measured by each node.

For example, the RSRP value measured by the serving node of the terminal 101 is RSRP_s_ul, and the RSRP value measured by a node in the CoMP candidate set of the terminal 101 is RSRP_candidate_ul. If the RSRP_candidate_ul-RSRP_s_ul ≥ P_Thr_ul, the network device 102 selects the node to enter the terminal 101. CoMP collaboration set. Among them, P_Thr_ul can be pre-agreed, for example: can be a value in the range of (-10dB, 0dB).

Alternatively, the network device 102 may sort the RSRP values measured by the nodes in the terminal 101 candidate set, and select the M nodes with the largest RSRP value to form a CoMP cooperation set.

In actual implementation, the SINR measurement may be used instead of the RSRP measurement to perform CoMP cooperative set selection.

Example four

In the fourth example, the network device 102 selects a part of the terminal to perform uplink and downlink joint measurement, that is, for a plurality of nodes in the CoMP candidate set of the terminal, some nodes adopt uplink measurement, and some nodes adopt downlink measurement, and for the terminal, the network device 102 Combining the results of the uplink measurement with the results of the downlink measurement, the CoMP cooperating set is selected.

As shown in FIG. 6, the process of example four includes the following steps:

S601: The network device 102 selects a part of the nodes in the CoMP candidate set of one terminal, and controls the nodes to perform uplink measurement on the terminal.

S602: The network device 102 selects other nodes in the CoMP candidate set of the terminal, and the control terminal performs downlink measurement on each node, and reports the measurement result.

S603: The network device 102 selects a CoMP collaboration set of the terminal according to the uplink measurement result and the downlink measurement result.

The execution of step S601 and step S602 is in no particular order. Step S602 specifically includes the following sub-steps:

S6021: The network device 102 selects other nodes in the CoMP candidate set of the terminal.

S6022: The network device 102 controls the selected nodes to send a downlink reference signal.

S6023: The network device 102 notifies the terminal to report the measurement result.

In step S603, the network device 102 may select a CoMP collaboration set of the terminal by using the following scheme:

For example, taking the measurement quantity RSRP as an example, other measurement quantities such as SINR are similar. The network device 102 compares the uplink RSRP measured by the node, that is, RSRP_candidate_ul_combined, with the uplink RSRP measured by the service node, that is, RSRP_s_ul_combined, if the following conditions are met. , then select the node to enter the terminal CoMP collaboration set:

RSRP_candidate_ul_combined-RSRP_s_ul_combined≥P_Thr_ul_combined;

The network device 102 compares the downlink RSRP measured by the terminal for a node, that is, RSRP_candidate_dl_combined, with the downlink RSRP measured by the terminal for the serving node, that is, RSRP_s_dl_combined. If the following conditions are met, the node selects the CoMP collaboration set of the node to enter the terminal. :

RSRP_candidate_dl_combined-RSRP_s_dl_combined≥P_Thr_dl_combined

Among them, P_Thr_ul_combined and P_Thr_dl_combined can be preset, for example, a value within a range of (-10dB, 0dB).

Alternatively, the network device 102 may also sort (RSRP_candidate_ul_combined-RSRP_s_ul_combined) of each node involved in the uplink measurement with (RSRP_candidate_dl_combined-RSRP_s_dl_combined) of each node involved in the downlink measurement, and select the largest N nodes to form the CoMP cooperation set of the terminal. .

Based on the same inventive concept, the embodiment of the present invention further provides two types of terminals, two types of network devices, and two CoMP cooperative set selection methods. For the implementation of the two types of terminals, reference may be made to the implementation of the terminal 101 in the foregoing wireless communication system. The implementation of the two network devices may refer to the implementation of the network device 102 in the foregoing wireless communication system, and the two CoMP cooperative set selection methods may refer to the wireless communication system separately. Implementation of the central terminal 101 and the network device 102. The repetitions are not repeated here. The following is a description of these terminals, network devices and methods.

FIG. 7 is a schematic structural diagram of a first terminal according to an embodiment of the present invention. As shown in FIG. 7, the terminal includes:

The processing module 701 is configured to separately perform downlink measurement on each of the multiple nodes in the CoMP candidate set of the terminal;

The transceiver module 702 is configured to send the downlink measurement result obtained by the downlink measurement performed by the processing module 701 to the network device, as a basis for the network device to select the CoMP collaboration set of the terminal from the CoMP candidate set of the terminal.

Optionally, the transceiver module 702 is further configured to:

Before the processing module 701 performs downlink measurement, receiving measurement configuration information from the network device, where the measurement configuration information includes configuration information of a downlink reference signal sent by each of the plurality of nodes;

For each node, according to the configuration information of the node, the downlink reference signal sent by the node is received.

The processing module 701 is specifically configured to perform downlink measurement on the downlink reference signals sent by each of the multiple nodes.

Optionally, the measurement configuration information includes:

Information about physical resources occupied by downlink reference signals transmitted by each of the plurality of nodes;

The physical resources occupied by the downlink reference signals sent by each of the multiple nodes satisfy:

The downlink reference signals sent by different nodes of the multiple nodes occupy different physical resources.

Optionally, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

On the physical resources of the downlink reference signal transmitted by one of the plurality of nodes, the other nodes of the plurality of nodes do not transmit signals.

Optionally, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

Total of physical resources occupied by downlink reference signals used by multiple nodes to measure interference and/or noise And least.

Optionally, the terminal communicates with the multiple nodes based on the LTE protocol;

If the terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.

Optionally, the terminal communicates with the multiple nodes based on the LTE protocol;

If the multiple nodes belong to different cells, and the terminal supports multiple CSI-Process measurements, the downlink reference signal is an SMR signal or a CRS;

If multiple nodes belong to different cells, and the terminal does not support multiple CSI-Process measurements, the downlink reference signal is CRS.

FIG. 8 is a schematic structural diagram of a second terminal according to an embodiment of the present invention. As shown in FIG. 8, the terminal includes:

The processor 801 is configured to perform downlink measurement on each of the multiple nodes in the CoMP candidate set of the terminal.

The transceiver 802 is configured to send the downlink measurement result obtained by the downlink measurement performed by the processor 801 to the network device, as a basis for the network device to select a CoMP collaboration set of the terminal from the CoMP candidate set of the terminal.

FIG. 9 is a schematic structural diagram of a first network device according to an embodiment of the present invention. As shown in FIG. 9, the network device includes:

The transceiver module 901 is configured to receive a downlink measurement result sent by the first terminal, where the downlink measurement result is that the first terminal performs downlink measurement on each of the multiple nodes included in the coordinated multi-point transmission CoMP candidate set of the first terminal. of;

The processing module 902 is configured to select a CoMP collaboration set of the first terminal from the CoMP candidate set of the first terminal according to the downlink measurement result received by the transceiver module 901.

Optionally, the transceiver module 901 is further configured to: before receiving the downlink measurement result, send the measurement configuration information to the first terminal, where the configuration information includes configuration information of the downlink reference signal sent by each of the multiple nodes;

The downlink measurement result is a downlink reference message sent by the first terminal to each of the plurality of nodes. The number is measured separately.

Optionally, the measurement configuration information includes:

Information about physical resources occupied by downlink reference signals transmitted by each of the plurality of nodes;

The physical resources occupied by the downlink reference signals sent by each of the multiple nodes satisfy:

The downlink reference signals sent by different nodes of the multiple nodes occupy different physical resources.

Optionally, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

On the physical resources of the downlink reference signal transmitted by one of the plurality of nodes, the other nodes of the plurality of nodes do not transmit signals.

Optionally, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.

Optionally, the first terminal communicates with the multiple nodes based on the Long Term Evolution (LTE) protocol;

If the first terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.

Optionally, the first terminal communicates with the multiple nodes based on the Long Term Evolution (LTE) protocol;

If the multiple nodes belong to different cells, and the first terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS;

If multiple nodes belong to different cells, and the first terminal does not support multiple CSI-Process measurements, the downlink reference signal is a cell-specific reference signal CRS.

Optionally, the plurality of nodes are part of the CoMP candidate set of the first terminal;

The processing module 902 is further configured to: before selecting the CoMP collaboration set of the first terminal, further comprising: controlling each of the nodes other than the multiple nodes in the CoMP candidate set of the first terminal, and performing uplink on the first terminal measuring;

The processing module 902 is specifically configured to: according to the received downlink measurement result, and each of the other nodes The uplink measurement result of the uplink measurement of the first terminal by one node selects the CoMP cooperation set of the first terminal from the CoMP candidate set of the first terminal.

Optionally, the processing module 902 is further configured to:

And selecting, according to an uplink measurement result that the second terminal performs uplink measurement by each of the plurality of nodes in the CoMP candidate set of the second terminal, selecting a CoMP cooperation set of the second terminal from the CoMP candidate set of the second terminal.

Optionally, the processing module 902 is further configured to: before selecting the CoMP collaboration set of the second terminal,

Determining, according to whether the first terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the first terminal, determining that the downlink measurement result sent by the first terminal needs to be from the CoMP candidate set of the first terminal Selecting a CoMP collaboration set of the first terminal;

Determining, according to whether the second terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the second terminal, determining each node pair according to the plurality of nodes in the CoMP candidate set of the second terminal The second terminal performs an uplink measurement result of the uplink measurement, and selects a CoMP cooperation set of the second terminal from the CoMP candidate set of the second terminal.

Optionally, the processing module 902 is further configured to: when the processing load of the current network device is greater than a preset processing load threshold, determine that the downlink measurement result sent by the first terminal needs to be selected, and select the first from the CoMP candidate set of the first terminal. The CoMP collaboration set of the terminal.

FIG. 10 is a schematic structural diagram of a second network device according to an embodiment of the present invention. As shown in FIG. 10, the network device includes:

The transceiver 1001 is configured to receive a downlink measurement result sent by the first terminal, where the downlink measurement result is that the first terminal performs downlink measurement on each of the multiple nodes included in the coordinated multi-point transmission CoMP candidate set of the first terminal. of;

The processor 1002 is configured to select a CoMP collaboration set of the first terminal from the CoMP candidate set of the first terminal according to the downlink measurement result received by the transceiver 1001.

FIG. 11 is a flowchart of a method for selecting a first CoMP collaboration set according to an embodiment of the present invention. As shown in FIG. 11, the method includes:

S1101: Perform downlink measurement on each of the multiple nodes included in the CoMP candidate set of the current terminal.

S1102: Send the downlink measurement result obtained by the downlink measurement to the network device, as a basis for the network device to select a CoMP collaboration set of the current terminal from the CoMP candidate set of the current terminal.

Optionally, before performing the downlink measurement in step S1101, the method further includes:

Receiving measurement configuration information from the network device, where the measurement configuration information includes configuration information of a downlink reference signal sent by each of the plurality of nodes;

For each node, according to the configuration information of the node, the downlink reference signal sent by the node is received.

Performing downlink measurement on each of the multiple nodes in the current terminal's CoMP candidate set, including:

The downlink reference signals transmitted by each of the plurality of nodes are respectively subjected to downlink measurement.

Optionally, the measurement configuration information includes:

Information about physical resources occupied by downlink reference signals transmitted by each of the plurality of nodes;

The physical resources occupied by the downlink reference signals sent by each of the multiple nodes satisfy:

The downlink reference signals sent by different nodes of the multiple nodes occupy different physical resources.

Optionally, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

On the physical resources of the downlink reference signal transmitted by one of the plurality of nodes, the other nodes of the plurality of nodes do not transmit signals.

Optionally, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.

Optionally, the current terminal communicates with multiple nodes based on the Long Term Evolution (LTE) protocol;

If the current terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal The number is the signal measurement resource SMR signal.

Optionally, the current terminal communicates with multiple nodes based on the Long Term Evolution (LTE) protocol;

If the multiple nodes belong to different cells, and the current terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS;

If multiple nodes belong to different cells, and the current terminal does not support multiple CSI-Process measurements, the downlink reference signal is a cell-specific reference signal CRS.

FIG. 12 is a flowchart of a second CoMP collaboration set selection method according to an embodiment of the present invention.

S1201: Receive a downlink measurement result sent by the first terminal, where the downlink measurement result is obtained by performing downlink measurement on each of the multiple nodes included in the CoMP candidate set of the first terminal by the first terminal;

S1202: Select a CoMP collaboration set of the first terminal from the CoMP candidate set of the first terminal according to the received downlink measurement result.

Optionally, before receiving the downlink measurement result in step S1201, the method further includes:

And transmitting measurement configuration information to the first terminal, where the configuration information includes configuration information of a downlink reference signal sent by each of the plurality of nodes.

The downlink measurement result is obtained by the first terminal respectively measuring downlink reference signals sent by each of the plurality of nodes.

Optionally, the measurement configuration information includes:

Information about physical resources occupied by downlink reference signals transmitted by each of the plurality of nodes;

The physical resources occupied by the downlink reference signals sent by each of the multiple nodes satisfy:

The downlink reference signals sent by different nodes of the multiple nodes occupy different physical resources.

Optionally, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes are also satisfied:

On the physical resources of the downlink reference signal transmitted by one of the plurality of nodes, the other nodes of the plurality of nodes do not transmit signals.

Optionally, the physical resources occupied by the downlink reference signal sent by each of the multiple nodes Also meets:

The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.

Optionally, the first terminal communicates with the multiple nodes based on the Long Term Evolution (LTE) protocol;

If the first terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.

Optionally, the first terminal communicates with the multiple nodes based on the Long Term Evolution (LTE) protocol;

If the multiple nodes belong to different cells, and the first terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS; if multiple nodes belong to different cells, and the first terminal does not Supporting multiple CSI-Process measurements, the downlink reference signal is a cell-specific reference signal CRS.

Optionally, the plurality of nodes are part of the CoMP candidate set of the first terminal;

Before selecting the CoMP collaboration set of the first terminal in step S1202, the method further includes: controlling each of the nodes other than the plurality of nodes in the CoMP candidate set of the first terminal to perform uplink measurement on the first terminal;

Step S1202: Selecting a CoMP collaboration set of the first terminal, including: selecting, according to the received downlink measurement result, an uplink measurement result of performing uplink measurement on the first terminal by each node of the other node, selecting the first from the CoMP candidate set of the first terminal A CoMP collaboration set of a terminal.

Optionally, it also includes:

And selecting, according to an uplink measurement result that the second terminal performs uplink measurement by each of the plurality of nodes in the CoMP candidate set of the second terminal, selecting a CoMP cooperation set of the second terminal from the CoMP candidate set of the second terminal.

Optionally, before the selecting the CoMP collaboration set of the second terminal in step S1202, the method further includes:

Determining, according to whether the first terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the first terminal, determining that the downlink measurement result sent by the first terminal needs to be from the CoMP candidate set of the first terminal Selecting a CoMP collaboration set of the first terminal;

Determining, according to whether the second terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the second terminal, determining each node pair according to the plurality of nodes in the CoMP candidate set of the second terminal The second terminal performs an uplink measurement result of the uplink measurement, and selects a CoMP cooperation set of the second terminal from the CoMP candidate set of the second terminal.

Optionally, when the processing load of the current network device is greater than the preset processing load threshold, determining that the CoMP collaboration set of the first terminal needs to be selected from the CoMP candidate set of the first terminal according to the downlink measurement result sent by the first terminal.

In summary, the terminal, the network device, and the CoMP cooperative set selection method provided by the embodiment of the present invention, when the CoMP collaboration set is selected, the measurement is performed by the terminal, and the network device selects the CoMP collaboration set according to the measurement result sent by the terminal, thereby reducing the network. The processing load of the device.

Further, when the measured downlink reference signal is configured for the terminal, the downlink reference signal sent by the different nodes is allocated reasonably, so as to save physical resources occupied by the downlink reference signal, and optionally, different nodes can be avoided at the same time. Interference.

Further, the network device may select, according to its own load, when performing CoMP cooperative set selection, perform uplink measurement on some nodes of one terminal, and perform downlink measurement on other nodes; or perform downlink measurement on some terminals in the network device, and other terminals further Adopt the method of uplink measurement. A suitable measurement method is selected according to the compliance of the network device.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can 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, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device to produce a machine that enables Instructions executed by a processor of a computer or other programmable data processing device generate means for implementing the functions specified in one or more blocks of the flowchart or in a block or blocks of the flowchart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims (36)

1. A terminal, comprising:

   a processing module, configured to perform downlink measurement on each of the multiple nodes in the coordinated multi-point transmission CoMP candidate set of the terminal;

   And a transceiver module, configured to send the downlink measurement result obtained by the downlink measurement performed by the processing module to the network device, as a basis for the network device to select a CoMP collaboration set of the terminal from a CoMP candidate set of the terminal.
2. The terminal of claim 1 wherein:

   The transceiver module is further configured to:

   Before the processing module performs the downlink measurement, receiving measurement configuration information from the network device, where the measurement configuration information includes configuration information of a downlink reference signal sent by each of the multiple nodes;

   Receiving, by each node, the downlink reference signal sent by the node according to the configuration information of the node;

   The processing module is specifically configured to perform the downlink measurement on the downlink reference signal sent by each of the multiple nodes.
3. The terminal according to claim 2, wherein the measurement configuration information comprises:

   Information about physical resources occupied by the downlink reference signal sent by each of the plurality of nodes;

   The physical resources occupied by the downlink reference signal sent by each of the multiple nodes are satisfied:

   The downlink reference signals sent by different ones of the multiple nodes occupy different physical resources.
4. The terminal according to claim 3, wherein the physical resources occupied by the downlink reference signal sent by each of the plurality of nodes further satisfy:

   On the physical resources of the downlink reference signal sent by one of the multiple nodes, the multiple The other nodes in the nodes do not send signals.
5. The terminal according to claim 3 or 4, wherein the physical resources occupied by the downlink reference signal sent by each of the plurality of nodes further satisfy:

   The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.
6. The terminal according to any one of claims 2 to 5, wherein the terminal communicates with the plurality of nodes based on a Long Term Evolution (LTE) protocol;

   If the terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.
7. The terminal according to any one of claims 2 to 5, wherein the terminal communicates with the plurality of nodes based on a Long Term Evolution (LTE) protocol;

   If the multiple nodes belong to different cells, and the terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS;

   If the multiple nodes belong to different cells, and the terminal does not support multiple CSI-Process measurements, the downlink reference signal is a cell-specific reference signal CRS.
8. A network device, comprising:

   a transceiver module, configured to receive a downlink measurement result sent by the first terminal, where the downlink measurement result is that each of the multiple nodes included in the coordinated multi-point transmission CoMP candidate set of the first terminal to the first terminal Obtained by downlink measurement separately;

   And a processing module, configured to select, according to the downlink measurement result received by the transceiver module, a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal.
9. The network device of claim 8 wherein:

   The transceiver module is further configured to: before receiving the downlink measurement result, send measurement configuration information to the first terminal, where the measurement configuration information includes a downlink reference signal sent by each of the multiple nodes. Configuration information;

   The downlink measurement result is that the first terminal sends to each of the multiple nodes The downlink reference signals are respectively measured.
10. The network device according to claim 9, wherein the measurement configuration information comprises:

    Information about physical resources occupied by the downlink reference signal sent by each of the plurality of nodes;

    The physical resources occupied by the downlink reference signal sent by each of the multiple nodes are satisfied:

    The downlink reference signals sent by different ones of the multiple nodes occupy different physical resources.
11. The network device according to claim 10, wherein the physical resources occupied by the downlink reference signal sent by each of the plurality of nodes further satisfy:

    On the physical resources of the downlink reference signal transmitted by one of the plurality of nodes, the other nodes of the plurality of nodes do not transmit signals.
12. The network device according to claim 10 or 11, wherein the physical resources occupied by the downlink reference signal sent by each of the plurality of nodes further satisfy:

    The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.
13. The network device according to any one of claims 9 to 12, wherein the first terminal and the plurality of nodes communicate based on a Long Term Evolution (LTE) protocol;

    If the first terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.
14. The network device according to any one of claims 9 to 12, wherein the first terminal and the plurality of nodes communicate based on a Long Term Evolution (LTE) protocol;

    If the multiple nodes belong to different cells, and the first terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS;

    If the multiple nodes belong to different cells, and the first terminal does not support multiple CSI-Process measurements, the downlink reference signal is a cell-specific reference signal CRS.
15. The network device according to claim 8, wherein the plurality of nodes are part of a CoMP candidate set of the first terminal;

    The processing module is further configured to: before selecting the CoMP collaboration set of the first terminal, further comprising: controlling each node of the CoMP candidate set of the first terminal except the plurality of nodes Performing uplink measurement on the first terminal;

    The processing module is specifically configured to: according to the received downlink measurement result, and the uplink measurement result of the uplink measurement performed by each node of the other node, the CoMP from the first terminal In the candidate set, the CoMP collaboration set of the first terminal is selected.
16. The network device according to claim 8, wherein the processing module is further configured to:

    Selecting, according to an uplink measurement result of performing uplink measurement on the second terminal by each of the multiple nodes in the CoMP candidate set of the second terminal, selecting a CoMP collaboration set of the second terminal from the CoMP candidate set of the second terminal .
17. The network device according to claim 16, wherein the processing module is further configured to: before selecting the CoMP collaboration set of the second terminal,

    Determining, according to whether the first terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the first terminal, determining, according to the downlink measurement result sent by the first terminal, Selecting a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal; and

    Determining, according to whether the second terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the second terminal, determining that multiple nodes in the CoMP candidate set according to the second terminal are required Each of the nodes performs the uplink measurement result of the uplink measurement on the second terminal, and selects a CoMP collaboration set of the second terminal from a CoMP candidate set of the second terminal.
18. The network device according to claim 16, wherein the processing module is further configured to: determine when a processing load of the current network device is greater than a preset processing load threshold

    According to the downlink measurement result sent by the first terminal, from the first terminal The CoMP candidate set selects the CoMP collaboration set of the first terminal.
19. A cooperative multi-point transmission CoMP cooperative set selection method, comprising:

    Performing downlink measurement on each of the plurality of nodes included in the CoMP candidate set of the current terminal;

    And transmitting the downlink measurement result obtained by the downlink measurement to the network device, as a basis for the network device to select a CoMP collaboration set of the current terminal from a CoMP candidate set of the current terminal.
20. The method of claim 19 wherein:

    Before performing the downlink measurement, the method further includes:

    Receiving measurement configuration information from the network device, the measurement configuration information including configuration information of a downlink reference signal transmitted by each of the plurality of nodes;

    Receiving, by each node, the downlink reference signal sent by the node according to the configuration information of the node;

    Performing downlink measurement on each of the multiple nodes in the current terminal's CoMP candidate set, including:

    Performing the downlink measurement on the downlink reference signals sent by each of the multiple nodes.
21. The method of claim 20 wherein said measuring configuration information comprises:

    Information about physical resources occupied by the downlink reference signal sent by each of the plurality of nodes;

    The physical resources occupied by the downlink reference signal sent by each of the multiple nodes are satisfied:

    The downlink reference signals sent by different ones of the multiple nodes occupy different physical resources.
22. The method according to claim 21, wherein the physical resources occupied by the downlink reference signal sent by each of the plurality of nodes further satisfy:

    On the physical resources of the downlink reference signal sent by one of the multiple nodes, the multiple The other nodes in the nodes do not send signals.
23. The method according to claim 21 or 22, wherein the physical resources occupied by the downlink reference signal sent by each of the plurality of nodes further satisfy:

    The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.
24. The method according to any one of claims 20 to 23, wherein the current terminal communicates with the plurality of nodes based on a Long Term Evolution (LTE) protocol;

    If the current terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.
25. The method according to any one of claims 20 to 23, wherein the current terminal communicates with the plurality of nodes based on a Long Term Evolution (LTE) protocol;

    If the multiple nodes belong to different cells, and the current terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS;

    If the multiple nodes belong to different cells, and the current terminal does not support multiple CSI-Process measurements, the downlink reference signal is a cell-specific reference signal CRS.
26. A cooperative multi-point transmission CoMP cooperative set selection method, comprising:

    Receiving a downlink measurement result sent by the first terminal, where the downlink measurement result is obtained by performing downlink measurement on each of the multiple nodes included in the CoMP candidate set of the first terminal by the first terminal;

    And selecting, according to the received downlink measurement result, a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal.
27. The method of claim 26, wherein

    Before receiving the downlink measurement result, the method further includes:

    And transmitting measurement configuration information to the first terminal, where the measurement configuration information includes configuration information of a downlink reference signal sent by each of the multiple nodes;

    The downlink measurement result is that the first terminal sends to each of the multiple nodes The downlink reference signals are respectively measured.
28. The method of claim 27 wherein said measuring configuration information comprises:

    Information about physical resources occupied by the downlink reference signal sent by each of the plurality of nodes;

    The physical resources occupied by the downlink reference signal sent by each of the multiple nodes are satisfied:

    The downlink reference signals sent by different ones of the multiple nodes occupy different physical resources.
29. The method according to claim 28, wherein the physical resources occupied by the downlink reference signal sent by each of the plurality of nodes further satisfy:

    On the physical resources of the downlink reference signal transmitted by one of the plurality of nodes, the other nodes of the plurality of nodes do not transmit signals.
30. The method according to claim 28 or 29, wherein the physical resources occupied by the downlink reference signal sent by each of the plurality of nodes further satisfy:

    The sum of the physical resources occupied by the downlink reference signals of the plurality of nodes for measuring interference and/or noise is the least.
31. The method according to any one of claims 27 to 30, wherein the first terminal and the plurality of nodes communicate based on a Long Term Evolution (LTE) protocol;

    If the first terminal supports multiple channel state indication process CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal.
32. The method according to any one of claims 27 to 30, wherein the first terminal and the plurality of nodes communicate based on a Long Term Evolution (LTE) protocol;

    If the multiple nodes belong to different cells, and the first terminal supports multiple CSI-Process measurements, the downlink reference signal is a signal measurement resource SMR signal or a cell-specific reference signal CRS; Different cells, and the first terminal does not support multiple CSI-Process measurements, and the downlink reference signal is a cell-specific reference signal CRS.
33. The method according to claim 26, wherein said plurality of nodes are partial nodes of a CoMP candidate set of said first terminal;

    Before selecting the CoMP collaboration set of the first terminal, the method further includes: controlling each of the other nodes except the plurality of nodes in the CoMP candidate set of the first terminal, and performing the first terminal on the first terminal Uplink measurement

    Selecting the CoMP collaboration set of the first terminal, including: performing, according to the received downlink measurement result, an uplink measurement result of the uplink measurement performed by each node of the other node on the first terminal, The CoMP candidate set of the first terminal selects a CoMP collaboration set of the first terminal.
34. The method of claim 26, further comprising:

    Selecting, according to an uplink measurement result of performing uplink measurement on the second terminal by each of the multiple nodes in the CoMP candidate set of the second terminal, selecting a CoMP collaboration set of the second terminal from the CoMP candidate set of the second terminal .
35. The method of claim 34, wherein

    Before selecting the CoMP collaboration set of the second terminal, the method further includes:

    Determining, according to whether the first terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the first terminal, determining, according to the downlink measurement result sent by the first terminal, Selecting a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal; and

    Determining, according to whether the second terminal supports multiple CSI-Process measurements, and whether there are nodes belonging to the same cell in the CoMP candidate set of the second terminal, determining that multiple nodes in the CoMP candidate set according to the second terminal are required Each of the nodes performs the uplink measurement result of the uplink measurement on the second terminal, and selects a CoMP collaboration set of the second terminal from a CoMP candidate set of the second terminal.
36. The method according to claim 34, wherein when the processing load of the current network device is greater than a preset processing load threshold, determining

    And selecting, according to the downlink measurement result sent by the first terminal, a CoMP collaboration set of the first terminal from a CoMP candidate set of the first terminal.

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