WO2014019168A1

WO2014019168A1 - Coordinated multi-point measurement method, base station, and user equipment

Info

Publication number: WO2014019168A1
Application number: PCT/CN2012/079505
Authority: WO
Inventors: 曾清海; 张宏平
Original assignee: 华为技术有限公司
Priority date: 2012-08-01
Filing date: 2012-08-01
Publication date: 2014-02-06
Also published as: CN103858467A; CN103858467B

Abstract

Disclosed are a coordinated multi-point (CoMP) measurement method, a base station, and a UE. The base station configures a CoMP measurement set for a serving cell (SCell or PCell) where the UE is aggregated, the CoMP measurement set comprising information of the serving cell (SCell or PCell) and a CoMP coordinated network element of the serving cell; and when the SCell needs to be deactivated or activated, or the PCell needs to stop or start CoMP communication, the base station may notify the UE about that through control signaling, so that the UE may stop performing or start to perform CSI measurement on the CoMP coordinated network element of the serving cell according to the CoMP measurement set, thereby avoiding performing a reconfiguration operation by using RRC signaling each time the SCell is deactivated or activated (or the PCell needs to stop or start CoMP communication), and reducing the overhead of the RRC signaling.

Description

Cooperative multipoint measurement method, base station and user equipment

The present invention relates to the field of communications, and in particular, to a coordinated multi-point (CoMP) measurement method, a base station, and a user equipment (UE). BACKGROUND With the respective development of mobile communication and broadband wireless access technologies, the services of the two are mutually infiltrated, in order to meet the demand for broadband of mobile communication and to cope with the challenge of broadband communication mobility, the third generation partner, Ji Ge 'J The 3rd generation partnership project (3GPP) working group put forward higher performance requirements for communication systems, for example, for peak rate, peak spectral efficiency, cell average frequency efficiency, cell edge spectrum efficiency, and system bandwidth. High requirements, in order to meet these requirements, the introduction of carrier aggregation (CA), CoMP and other technologies.

CA technology can obtain larger bandwidth by aggregating multiple consecutive or non-contiguous component carriers, thereby improving peak data rate and system throughput, and also solving the problem of carrier spectrum discontinuity. The UE can support multiple component carrier (CC) aggregations in the downlink and uplink respectively. Among the aggregated component carriers, one uplink primary component carrier (UL PCC) and one downlink primary component carrier (DL PCC) are included. The other component carriers are secondary component carriers, including an uplink secondary component carrier (UL SCC ) and a downlink secondary component carrier (DL SCC ). The number of uplink and downlink secondary component carriers may be the same or different. For example, in an actual application, the downlink data service requirement is higher than the uplink, and the aggregation mode of the downlink secondary component carrier and the uplink secondary component carrier may be used. When the CA is configured, the UE and the network have only one RRC connection. When the RRC connection is established, re-established or switched, a serving cell provides non-access stratum (NAS) mobility information and Security input, the serving cell is called the primary serving cell (PCell). The uplink of the PCell corresponds to the UL PCC, and the downlink of the PCell corresponds to the DL PCC. The other serving cell configured by the UE is called a secondary serving cell (SCell). The uplink of the SCell corresponds to the UL SCC, and the downlink of the SCell corresponds to the DL SCC. When the DL SCC is more than the UL SCC, there is a single downlink SCell. PCell and SCell are collectively referred to as a serving cell. In order to save resources, the CA supports SCell activation and deactivation. For example, when the UE's service demand for broadband is reduced or the SCell's radio conditions are poor, the base station can deactivate the SCell. The UE does not listen to the physical downlink control channel (PDCCH) on the deactivated SCell, does not receive downlink data on the physical downlink shared channel (PDSCH), and does not send data or information on the physical uplink shared channel (PUSCH) and the physical uplink control channel (PUCCH). Such as channel state information (CSI), sounding reference signal (SRS), and so on.

The CoMP technology communicates with the UE by utilizing cooperation among a plurality of geographically separated network elements, thereby reducing interference of cell edge UEs and improving cell edge throughput. Currently, the base station performs radio resource control (RRC) configuration to instruct the UE to perform channel state information (CSI) measurement and reporting, and coordinate resource allocation of multiple network elements participating in CoMP cooperation according to the CSI reported by the UE. The network element may be, for example, a cell, a node corresponding to the cell (for example, a base station, a relay node), a remote radio head (RRH), and a radio remote unit (RRU). Antenna ports, etc., can be collectively referred to as transmission points (TP).

In a CA scenario, if an SCell is configured to participate in CoMP transmission, the UE will stop its CSI measurement after the SCell is deactivated. However, the CSI measurement and reporting of the UE to other CoMP cooperative network elements will continue according to the RRC configuration. However, these measurements and reports are invalid, because in this case, the network does not schedule the CoMP cooperative network elements of the SCell, thereby causing waste of UE power and uplink signaling, resulting in uplink interference. On the one hand, if RRC signaling is used to de-configure the CSI measurement of the CoMP cooperative network element, each time the SCell is deactivated, RRC signaling needs to be used for reconfiguration, and the SCell deactivation is performed frequently. At this time, more RRC signaling overhead is wasted. On the other hand, if the deactivation operation of the SCell is restricted, when the user traffic is temporarily low, and the SCell does not need to remain active, the The SCell is deactivated, which is detrimental to the power saving of the UE. In addition, when a certain SCell is activated, the CSI measurement of the CoMP cooperative network element is also configured by using the RRC signaling. When the SCell is activated, the RRC signaling needs to be used for reconfiguration. When the operation for the SCell is activated frequently. , will waste more RRC signaling overhead.

In addition, if a PCell is configured to participate in CoMP transmission, when the resource overhead of the PCell is large and is no longer suitable for participating in CoMP transmission, since the PCell cannot be deactivated, the CSI measurement and reporting of the PCell will continue. At this time, the CSI measurement and reporting of other CoMP cooperative NEs will continue according to the RRC configuration. However, these measurements and reports on other CoMP cooperating network elements are ineffective because in this case the network does not schedule the CoMP cooperating network elements of the PCell, resulting in the same problems as when deactivating the SCell described above. In addition, when the PCell is reconfigured to participate in CoMP transmission, it also faces CSI measurement using the RRC signaling to configure the CoMP cooperative network element, which also wastes more RRC signaling overhead.

In view of the above, the embodiments of the present invention provide a CoMP measurement method, a base station, and a UE, to reduce RRC signaling overhead when stopping or starting CoMP communication for a serving cell configured to participate in CoMP transmission in a CA scenario.

In a first aspect, a coordinated multi-point measurement method is provided, including: a base station transmitting a coordinated multi-point (CoMP) measurement set to a user equipment (UE), where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes a And the information about the serving cell and the information of the CoMP cooperative network element of the serving cell; the base station sends control signaling to the UE, where the control signaling is used to indicate that the UE stops or starts according to the CoMP measurement set. Channel state information (CSI) measurement is performed on the CoMP cooperative network element of the serving cell.

In a first possible implementation manner of the first aspect, the serving cell is a secondary serving cell, and the control signaling is deactivation signaling or activation signaling of the secondary serving cell, where The deactivation signaling is used to instruct the UE to stop performing CSI measurement on the CoMP cooperative network element of the serving cell according to the CoMP measurement set, where the activation signaling is used to indicate that the UE starts to perform according to the CoMP measurement set. The CoMP cooperative network element of the serving cell performs CSI measurement.

In a second possible implementation manner of the first aspect, in combination with the first aspect or the first possible implementation manner of the first aspect, when the serving cell is a secondary serving cell, the control signaling is further used. Instructing the UE to stop or start performing CSI measurement on the secondary serving cell.

In a third possible implementation manner of the first aspect, the information of the serving cell and the CoMP cooperative network element of the serving cell are combined with the first aspect to the second possible implementation manner of the first aspect. The information includes one or any combination of the following: a cell index, a cell identity, or frequency information.

In a fourth possible implementation manner of the first aspect, the CoMP measurement set further includes a CoMP measurement set identifier, in combination with the first aspect to one of the third possible implementation manners of the first aspect.

In a fifth possible implementation manner of the first aspect, in combination with the first aspect to the fourth possible implementation manner of the first aspect, the CoMP measurement set further includes a channel quality indication (CQI) report configuration, where The CQI reporting configuration includes one or any combination of the following: CQI, Precoding Matrix Indication (PMI), Precoding Type Indication (PTI), Rank Indication (RI).

In a sixth possible implementation manner of the first aspect, the control signaling is further used to indicate that the UE is configured according to the CoMP according to the first aspect to one of the fifth possible implementation manners of the first aspect The set stops or starts to perform CSI measurement on the CoMP cooperative network element of the serving cell in a predetermined subframe.

In a seventh possible implementation manner of the first aspect, in combination with the first aspect to the first possible implementation manner of the first aspect, the base station sends the CoMP measurement set to the UE by using dedicated signaling, where The dedicated signaling includes a radio resource control connection reconfiguration message or a medium access control layer control cell (MAC CE).

In an eighth possible implementation of the first aspect, in combination with the first aspect to one of the seventh possible implementation manners of the first aspect, the control signaling is a MAC CE. In a second aspect, a coordinated multipoint measurement method is provided, including: a user equipment (UE) receives a coordinated multipoint (CoMP) measurement set sent by a base station, the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes The information of the serving cell and the information of the CoMP cooperative network element of the serving cell; the UE receiving the control signaling sent by the base station, and stopping or starting the opposite according to the control signaling and the CoMP measurement set The CoMP cooperative network element of the serving cell performs channel state information (CSI) measurement.

In a first possible implementation manner of the second aspect, the serving cell is a secondary serving cell, and the control signaling is deactivation signaling or activation signaling of the secondary serving cell, and the UE is configured according to Deactivating signaling and the CoMP measurement set stop performing CSI measurement on a CoMP cooperative network element of the serving cell, or the UE starts CoMP cooperation on the serving cell according to the activation signaling and a CoMP measurement set The network element performs CSI measurement.

In a second possible implementation manner of the second aspect, in combination with the second aspect or the first possible implementation manner of the second aspect, when the serving cell is a secondary serving cell, the control signaling is further used. Instructing the UE to stop or start performing CSI measurement on the secondary serving cell.

In a third possible implementation manner of the second aspect, the information of the serving cell and the CoMP cooperative network element of the serving cell are combined with the second aspect to the second possible implementation manner of the second aspect The information includes one or any combination of the following: a cell index, a cell identity, or frequency information.

In a fourth possible implementation manner of the second aspect, in combination with the second aspect to the third possible implementation manner of the second aspect, the CoMP measurement set further includes a CoMP measurement set identifier.

In a fifth possible implementation manner of the second aspect, in combination with the second aspect, the fourth possible implementation manner of the second aspect, the CoMP measurement set further includes a channel quality indicator (CQI) report configuration, where The CQI reporting configuration includes one or any combination of the following: CQI, Precoding Matrix Indication (PMI), Precoding Type Indication (PTI), Rank Indication (RI).

In a sixth possible implementation manner of the second aspect, in combination with the second aspect to the fifth possible implementation manner of the second aspect, the UE stops or starts to use the secondary service in a predetermined subframe. The CoMP cooperative network element of the cell performs CSI measurement.

In a seventh possible implementation manner of the second aspect, in combination with the second aspect to the sixth possible implementation manner of the second aspect, the UE receives the CoMP measurement set by using dedicated signaling, where the dedicated The signaling includes a radio resource control connection reconfiguration message or a medium access control layer control cell (MAC CE).

In an eighth possible implementation manner of the second aspect, in combination with the second aspect to the seventh possible implementation manner of the second aspect, the control signaling is a MAC CE.

In a third aspect, a base station is provided, including: a sending unit, configured to send a coordinated multi-point (CoMP) measurement set to a user equipment (UE), where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes And the information about the serving cell and the information of the CoMP cooperative network element of the serving cell; the control unit, configured to generate control signaling, and send the control signaling to the UE by using the sending unit, where the control The signaling is used to instruct the UE to stop or start performing channel state information (CSI) measurement on the CoMP cooperative network element of the serving cell according to the CoMP measurement set.

In a first possible implementation manner of the third aspect, the serving cell is a secondary serving cell, and the control signaling is deactivation signaling or activation signaling of the secondary serving cell, where The activation signaling is used to instruct the UE to stop performing CSI measurement on the CoMP cooperative network element of the serving cell according to the CoMP measurement set, where the activation signaling is used to indicate that the UE starts to perform according to the CoMP measurement set. The CoMP cooperative network element of the serving cell performs CSI measurement.

In a second possible implementation manner of the third aspect, in combination with the third aspect or the first possible implementation manner of the third aspect, when the serving cell is a secondary serving cell, the control signaling is further used. Instructing the UE to stop or start performing CSI measurement on the secondary serving cell.

In a third possible implementation manner of the third aspect, in combination with the third possible implementation manner of the third aspect to the third aspect, the information of the serving cell and the CoMP cooperative network element of the serving cell The information includes one or any combination of the following: a cell index, a cell identity, or frequency information. In a fourth possible implementation manner of the third aspect, in combination with the third aspect to the third possible implementation manner of the third aspect, the CoMP measurement set further includes a CoMP measurement set identifier.

In a fifth possible implementation manner of the third aspect, in combination with the third aspect to the fourth possible implementation manner of the third aspect, the CoMP measurement set further includes a channel quality indication (CQI) report configuration, where The CQI reporting configuration includes one or any combination of the following: CQI, Precoding Matrix Indication (PMI), Precoding Type Indication (PTI), Rank Indication (RI).

In a sixth possible implementation manner of the third aspect, in combination with the third aspect to the fifth possible implementation manner of the third aspect, the control signaling is further used to indicate that the UE is configured according to the CoMP The set stops or starts to perform CSI measurement on the CoMP cooperative network element of the serving cell in a predetermined subframe.

In a seventh possible implementation manner of the third aspect, the transmitting unit is further configured to send CoMP to the UE by using dedicated signaling, in combination with the third aspect to the sixth possible implementation manner of the third aspect, The measurement set includes a radio resource control connection reconfiguration message or a medium access control layer control cell (MAC CE).

In an eighth possible implementation of the first aspect, in combination with the first aspect to one of the seventh possible implementation manners of the first aspect, the control signaling is a MAC CE.

A fourth aspect, a user equipment (UE) is provided, including: a receiving unit, configured to receive a coordinated multi-point (CoMP) measurement set sent by a base station, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes The information of the serving cell and the information of the CoMP cooperative network element of the serving cell; the receiving unit is further configured to receive control signaling sent by the base station, and the measuring unit is configured to: according to the CoMP measurement set The serving cell and the CoMP cooperative network element of the serving cell perform CSI measurement; the control unit is configured to control, according to the control signaling and the CoMP measurement set, the measurement unit to stop or start CoMP cooperation on the serving cell The network element performs channel state information (CSI) measurement.

In a first possible implementation manner of the fourth aspect, the serving cell is a secondary serving cell, and the control signaling is deactivation signaling or activation signaling of the secondary serving cell, where the control list is The element is further configured to control, according to the deactivation signaling and the CoMP measurement set, the measurement unit to stop performing CSI measurement on a CoMP cooperative network element of the serving cell, or further used to perform measurement according to the activation signaling and CoMP The set control unit performs the CSI measurement on the CoMP cooperative network element of the serving cell.

In a second possible implementation manner of the fourth aspect, in combination with the fourth aspect or the first possible implementation manner of the fourth aspect, when the serving cell is a secondary serving cell, the control unit is further used to control The measuring unit stops or starts performing CSI measurement on the secondary serving cell.

In a third possible implementation manner of the fourth aspect, the information of the serving cell and the CoMP cooperative network element of the serving cell are combined with the second possible implementation manner of the fourth aspect to the fourth aspect The information includes one or any combination of the following: a cell index, a cell identity, or frequency information.

In a fourth possible implementation manner of the fourth aspect, in combination with the third aspect to the third possible implementation manner of the fourth aspect, the CoMP measurement set further includes a CoMP measurement set identifier.

In a fifth possible implementation manner of the fourth aspect, the CoMP measurement set further includes a channel quality indication (CQI) report configuration, in combination with the fourth aspect to the fourth possible implementation manner of the fourth aspect, The CQI reporting configuration includes one or any combination of the following: CQI, Precoding Matrix Indication (PMI), Precoding Type Indication (PTI), Rank Indication (RI).

In a sixth possible implementation manner of the fourth aspect, in combination with the fourth aspect, the fifth possible implementation manner of the fourth aspect, the control unit controls the measurement unit to stop or start to start in a predetermined subframe The CoMP cooperative network element of the secondary serving cell performs CSI measurement.

In a seventh possible implementation manner of the fourth aspect, in combination with the fourth aspect, the sixth possible implementation manner of the fourth aspect, the receiving unit, by using dedicated signaling, receiving the CoMP measurement set, The dedicated signaling includes a radio resource control connection reconfiguration message or a medium access control layer control cell (MAC CE).

In an eighth possible implementation manner of the fourth aspect, in combination with the fourth possible implementation manner of the fourth aspect to the fourth aspect, the control signaling is a MAC CE. In a fifth aspect, a base station is provided, including a transmitter, a memory, and a processor respectively connected to the transmitter and the memory, wherein the memory stores a set of program codes and coordinated multiple points

a (CoMP) measurement set, the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information of the serving cell and information of a CoMP cooperative network element of the serving cell; the processor invokes the memory The program code stored in the following, is configured to: send, by using the transmitter, the CoMP measurement set to a user equipment (UE); generate control signaling, where the control signaling is used to indicate that the UE is according to the CoMP The measurement set stops or begins to perform channel state information (CSI) measurement on the CoMP cooperative network element of the serving cell; the control signaling is sent to the UE by the transmitter.

In a sixth aspect, a user equipment (UE) is provided, including a receiver, a memory, and a processor respectively connected to the receiver and the memory, wherein the memory stores a set of program codes, and the processor calls the memory The stored program code is configured to: receive, by the receiver, a coordinated multi-point (CoMP) measurement set sent by a base station, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes the service Information of the cell and information of the CoMP cooperative network element of the serving cell; receiving, by the receiver, control signaling sent by the base station; stopping or starting the service according to the control signaling and the CoMP measurement set The CoMP cooperative network element of the cell performs channel state information (CSI) measurement.

A seventh aspect, a computer program product, comprising a computer readable medium, comprising a program code for performing the first aspect, the second aspect, any one of the possible implementations of the first aspect, or A CoMP measurement method in any of the possible implementations of the second aspect.

The base station configures a CoMP measurement set for the serving cell (SCell or PCell) aggregated by the UE, where the CoMP measurement set includes information of the serving cell (SCell or PCell) and its CoMP cooperative network element. When the SCell needs to be deactivated, the base station may notify the UE by using control signaling, so that the UE may stop performing CSI measurement on the CoMP cooperative network element of the SCell according to the CoMP measurement set; or when the PCell needs to stop CoMP communication, the base station The UE may be notified by control signaling, so that the UE may stop the PCell according to the CoMP measurement set The CoMP cooperative network element performs CSI measurement. In this way, the CoMP cooperative network element of the serving cell does not continue to perform CSI measurement according to the RRC configuration, which reduces invalid measurement and reporting, thereby reducing the consumption of the UE power and the waste of the uplink signaling. In addition, the embodiment directly uses the control signaling to directly notify the UE to stop performing CSI measurement on the CoMP cooperative network element of the serving cell, and avoids the operation of reconfiguring by using RRC signaling when deactivating SCelK or PCell needs to stop CoMP communication. The overhead of the RRC signaling is reduced. Correspondingly, when the SCell is activated (or the PCell is reconfigured to participate in the CoMP communication), the embodiment directly uses the control signaling to directly notify the UE to start CSI measurement of the CoMP cooperative network element of the serving cell. The operation of reconfiguring by using RRC signaling every time the SCell is activated (or the PCell rejoins the CoMP communication) is avoided, and the overhead of the RRC signaling is reduced.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a flowchart of a CoMP measurement method according to an embodiment of the present invention;

2 is a flowchart of another CoMP measurement method according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a control signaling format according to an embodiment of the present invention;

4 is a schematic flowchart of a CoMP measurement method according to an embodiment of the present invention; FIG. 5 is a schematic flowchart of another CoMP measurement method according to an embodiment of the present invention; FIG. 7 is a schematic flowchart of a method for measuring a CoMP measurement according to an embodiment of the present invention; FIG. 8 is a schematic flowchart of a method for configuring a CoMP measurement set according to an embodiment of the present invention; ;

FIG. 9 is a schematic flowchart of still another method for configuring a CoMP measurement set according to an embodiment of the present invention;

FIG. 10 is a functional block diagram of a base station according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present disclosure; FIG. 12 is a functional block diagram of a UE according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of a UE according to an embodiment of the present invention.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

In some embodiments, well-known methods, interfaces, and device signaling techniques are not specifically described in order to avoid obscuring the present invention. Furthermore, individual functional modules are shown in some of the figures. Those skilled in the art will appreciate that these functions can be implemented in the following manner: a separate hardware circuit, a properly programmed digital microprocessor or a general purpose computer running software, an application specific integrated circuit (ASIC), and/or one or more Digital Signal Processor (DSP).

Please refer to FIG. 1 , which is a flowchart of a CoMP measurement method according to an embodiment of the present invention. As shown in the figure, the method includes the following steps:

S110: The base station sends a CoMP measurement set to the UE, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information about the serving cell and information of a CoMP cooperative network element of the serving cell.

S120: The base station sends control signaling to the UE, where the control signaling is used to instruct the UE to stop or start performing CSI measurement on a CoMP cooperative network element of the serving cell according to the CoMP measurement set.

The serving cell is a serving cell configured to participate in CoMP communication. The CoMP measurement is a measurement performed by the UE for the purpose of CoMP operation, and is performed on one or more CoMP cooperative network elements or network elements that may become CoMP cooperative network elements, including but not limited to CSI measurement, radio resource management (RRM) measurement, signal to interference plus noise ratio (SINR) measurement, etc., may be based on cell specific reference signal (CRS) or channel state information Channel state information reference signal (CSI-RS). The network may also perform measurements based on uplink signals, such as based on a sounding reference signal (SRS), a demodulation reference signal (DMRS), and the like.

Corresponding to the CoMP measurement method shown in FIG. 1, the embodiment of the present invention further provides a CoMP measurement method. As shown in FIG. 2, the execution body of the method is a UE, and the method includes the following steps:

S210: The UE receives a CoMP measurement set sent by the base station, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information about the serving cell and information of a CoMP cooperative network element of the serving cell.

S220: The UE receives the control signaling sent by the base station, and stops or starts to perform channel state information CSI measurement on the CoMP cooperative network element of the serving cell according to the control signaling and the CoMP measurement set.

The serving cell is a serving cell configured to participate in CoMP communication. And each service cell corresponds to a CoMP measurement set. And the correspondence between the serving cell and the CoMP measurement set may be determined according to the cell index, the cell identifier, or the frequency information of the monthly service cell. In addition, the CoMP measurement is a measurement performed by the UE for the purpose of CoMP operation, and is performed on one or more CoMP cooperative network elements or network elements that may become CoMP cooperative network elements, including but not limited to CSI measurement, RRM measurement. , SINR measurement, etc., may be based on CRS or CSI-RS. The network can also measure based on uplink signals, such as based on SRS, DMRS, and so on.

In the above embodiment, the base station configures a CoMP measurement set for the serving cell (SCell or PCell) aggregated by the UE, where the CoMP measurement set includes information of the serving cell (SCell or PCell) and its CoMP cooperative network element. When the SCell needs to be deactivated, the base station may notify the UE by using control signaling, so that the UE may stop performing CSI measurement on the CoMP cooperative network element of the SCell according to the CoMP measurement set; or when the PCell is required due to a large load or the like Stop CoMP During communication, the base station may notify the UE by using control signaling, so that the UE may perform measurement according to the CoMP.

The CoMP cooperative network element does not continue the CSI measurement according to the RRC configuration, which reduces invalid measurement and reporting, thereby reducing the consumption of the UE power and the waste of the uplink signaling. In addition, the embodiment directly uses the control signaling to directly notify the UE to stop performing CSI measurement on the CoMP cooperative network element of the serving cell, and avoids the operation of reconfiguring by using RRC signaling each time the SCell is deactivated (or the PCell needs to stop CoMP communication). , reducing the overhead of RRC signaling; correspondingly, for each activation of SCell

When the PCell is reconfigured to participate in the CoMP communication, the present embodiment directly uses the control signaling to notify the UE to start CSI measurement of the CoMP cooperative network element of the serving cell, thereby avoiding the activation of the SCell each time.

(or PCell re-participating in CoMP communication) The operation of reconfiguration using RRC signaling reduces the overhead of RRC signaling.

Of course, the base station can also configure the CoMP measurement set for the SCell and the PCell. In this embodiment, one of the configurations is used as an example. In the case of configuration, a CoMP measurement set is configured for each SCell or PCell, and for each SCell. Or the processing of PCell is the same as the above embodiment.

It should be noted that when the serving cell of the above embodiment is a PCell, since the PCell needs to remain in the active state at all times, it is not necessary to stop or restart the CSI measurement for the PCell. When the serving cell of the above embodiment is a SCell, and the SCell needs to be deactivated or activated, the UE needs to stop or start CSI measurement on the SCell itself in addition to stopping or starting CSI measurement on the SCell's cooperative network element. At this time, the control signaling is further used to instruct the UE to stop or start performing CSI measurement on the SCell.

Preferably, the control signaling may be deactivation signaling or activation signaling of the SCell, for deactivating or activating the SCelL, for example, for deactivating or activating the media access control layer control cell of the SCell (Medium Access The control layer control element, MAC CE ); and in the prior art, the UE only deactivates or activates the SCell according to the signaling, and stops or starts CSI measurement on the SCell, and if the SCMP CoMP cooperative network element To stop or start its CSI measurement, it needs to be configured through RRC signaling, and the overhead of RRC signaling is large. And if RRC signaling is not used, This will result in invalid measurement and reporting, resulting in the consumption of UE power and the waste of uplink signaling. In the above embodiment, the UE deactivates or activates the SCell according to the deactivation signaling or the activation signaling, and stops or starts the CoMP cooperative network element of the SCell according to the deactivation signaling or the activation signaling. The CSI measurement avoids the occurrence of the above two situations, reduces the overhead of RRC signaling, and reduces the power consumption of the UE and the waste of uplink signaling. In addition, the embodiment of the present invention does not impose any limitation. The control signaling may also be added control signaling, or other existing signaling, as long as it can be used to instruct the UE to stop or start the CoMP cooperative network element for the serving cell. The CSI measurement can be. It should be noted that the deactivation signaling or activation signaling may refer to the same signaling, and different values are used to deactivate or activate the SCell respectively; or two signalings may be used for deactivation or activation respectively. SCell. The embodiment of the invention does not impose any limitation.

Further, the information of the serving cell and the information of the CoMP cooperative network element of the serving cell in the foregoing embodiments may be a cell index, a frequency information, or a combination of the two.

In addition, the UE may stop or start CSI measurement of the CoMP cooperating network element of the serving cell in the predetermined subframe. The predetermined subframe may be an nth subframe (n is a positive integer) after the base station sends control signaling (or deactivates SCell) to the UE. For example, in subframe n1 (nl is an integer greater than or equal to 0), the base station sends control signaling to the UE, and the UE stops CSI of the SCell and its CoMP cooperative network element in subframe nl+8 (in this case, n=8) Measurement and reporting.

It should be noted that the above control signaling can be MAC CE for both PCell and SCell. For example, the header information of the MAC CE is represented by a specific value of the logical channel identifier, using a value of the 3GPP MAC protocol TS36.321 V10.5.0 downlink shared channel MAC CE reserved value range 01011-11010.

The MAC CE header uses the fixed-length MAC sub-header format, as shown in Figure 3 (1), where R represents the reserved field, which is l bit ), E represents the extended field, which is l bit, and the remaining 5 bits are used to represent the logical channel identifier ( LCID).

The format of the MAC CE static load is shown in Figure 3 ( 2 ): C0 ~ C7 each occupy lbit, of which CO takes "0" and "1" respectively indicate "stop" and "start" CSI measurement for PCell CoMP cooperative network elements; CI ~ C7 are SCell indexes (SCelllndex), and CI ~ C7 take "0" and "1" Represents "stop" and "start" respectively for CSI measurements of SCell and its CoMP cooperating network elements.

In the foregoing embodiment, in a serving cell configured to participate in CoMP communication, there may be a case where the SCell is deactivated, or a case where the SCell is activated; and the two cases may refer to different SCells, that is, deactivated and The activated SCells are different SCells; they can also refer to the same SCell, that is, the same SCell is deactivated and activated. In addition, the serving cell configured to participate in CoMP communication may also include a PCell, which needs to stop CoMP communication due to a change in load condition, and then restart CoMP communication. The embodiments of the present invention can be applied to any of the above situations, and can also be applied to the combination of the foregoing, and the embodiment of the present invention does not impose any limitation.

For example, please refer to FIG. 4, which is a schematic flowchart of a CoMP measurement method according to an embodiment of the present invention. As shown, the method includes the following steps:

S410: The base station configures a CoMP measurement set for the serving cell (PCell or SCell) by using an RRC connection reconfiguration message. That is, the base station sends an RRC connection reconfiguration message to the UE, where the message carries a CoMP measurement set, where the CoMP measurement set is configured to participate in CoMP. The PCell or SCell of the communication to implement the configuration of CoMP measurements for the serving cell.

S420: The UE sends a radio resource connection reconfiguration complete (RRC connection reconfiguration complete) message to the base station.

S430: The UE measures and reports the CSI of the serving cell and its CoMP cooperative network element (ie, the CoMP measurement set SCell and each CoMP cooperative network element) according to the configuration of the CoMP measurement set. The measurement and reporting are performed on a Physical Uplink Control Channel (PUCCH) or PUSCH.

S440: The base station sends a MAC CE to the UE, where the MAC CE is used to indicate that the UE stops the CSI measurement of the serving cell (excluding the PCell) and its CoMP cooperative network element.

S450: After receiving the MAC CE indicating that the UE stops the serving cell (excluding the PCell) and the CSI measurement of the CoMP cooperative network element, the UE stops the CSI measurement of the serving cell (excluding the PCell) and its CoMP cooperative network element, correspondingly, The 4 warnings of CSI measurement were also stopped. S460: The base station sends a MAC CE to the UE, where the MAC CE is used to instruct the UE to start CSI measurement of the serving cell (excluding the PCell) and its CoMP cooperative network element.

S470: After receiving the MAC CE indicating that the UE starts the serving cell (excluding the PCell) and the CSI measurement of the CoMP cooperative network element, the UE starts the CSI measurement of the serving cell (excluding the PCell) and its CoMP cooperative network element, and correspondingly, A report on CSI measurements is also started.

In step S470, in the step of starting the CSI measurement of the serving cell (excluding the PCell) and its CoMP cooperative network element, excluding the PCell means not restarting the CSI measurement of the PCell by using the MAC CE indication. This is because the CSI measurement for the PCell has never stopped, so no MAC CE is required to indicate that the UE restarts the CSI measurement for the PCell.

For the newly configured SCell, it is deactivated by default; after the UE switches to the target base station, the SCell also defaults to the deactivated state, and the UE stops the CSI measurement of the SCell and its CoMP cooperative network element. Then, after the UE switches to the target base station, the CSI measurement of the SCell and its CoMP cooperative network element is not started immediately; instead, the UE is instructed by the control signal to perform CSI measurement in the predetermined subframe by using the method described in the above embodiment. The method of CoMP measurement in the case where the UE switches from the source base station to the target base station will be described in detail below with reference to FIG.

Please refer to FIG. 5, which is a schematic flowchart of a CoMP measurement method according to an embodiment of the present invention. As shown in the figure, the following steps are included:

S510: The UE sends a measurement report to the source base station.

S520: The source base station performs a handover decision according to the measurement report, that is, determines whether the UE needs to switch. When it is necessary to perform the handover, step S530 is performed.

S530: The source base station sends a handover request to the target base station.

S540: The target base station returns a handover response to the source base station, where the handover response carries CoMP measurement

S550: The source base station sends an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message includes a handover command, such as RRC Connection Reconfiguration with Mobility Control INfo. The RRC connection reconfiguration message carries a configuration configured by the target base station The CoMP measurement set.

S560: The UE acquires synchronization with the target cell (for example, through a random access procedure), and sends an RRC connection reconfiguration complete message to the target base station. The default state of the SCell corresponding to the CoMP measurement set is deactivated, and the CSI measurement of the SCell and its CoMP cooperative network element is not immediately started.

S570: The base station sends, to the UE, control signaling for activating the SCell, where the control signaling is used to indicate

The UE starts the CSI measurement of the SCell and its CoMP cooperative network element.

S580: The UE starts CSI measurement of the SCell and its CoMP cooperative network element.

Preferably, in step S580, the UE starts CSI measurement of the SCell and its CoMP cooperative network element in a predetermined subframe. For example, in the subframe n1 (nl is an integer greater than or equal to zero), the base station sends control signaling for activating the SCell to the UE, and the UE starts CSI measurement of the SCell and its CoMP cooperative network element in the subframe nl+n.

The following takes the SCell as an example to describe the CoMP measurement method provided by the above embodiments in combination with the four commonly used CoMP scenarios. The four CoMP scenarios include: scenario 1, homogeneous network intra-site CoMP; scenario 2, a homogeneous network with a high-power remote radio head (RRH); scenario 3 A heterogeneous network with a low-power RRH, where each RRH is located within the coverage of a macro cell, and different transmit/receive points generated by each RRH have different cell IDs (cell IDs). Scenario 4 is a heterogeneous network with a low-power RRH, where each RRH is located within the coverage of the macro cell, and different transmit/receive points generated by each RRH have the same cell ID (cell ID) as the macro cell. However, the embodiments of the present invention are not limited thereto. The foregoing method can also be applied to inter-base station (Inter-eNB) CoMP. For example, with the development of technology, CoMP is also used for a backhaul chain with limited capacity and a certain delay. The base station of the road.

In the above four scenarios, the cooperative network elements of the first three scenarios have different cell IDs, and the CSI measurement may be based on a cell specific reference signal (CRS). The cooperative network elements of the fourth scenario have the same cell ID, and the CSI measurement may be based on a channel state information reference signal (CSI-RS). Please refer to FIG. 6 , which is a schematic flowchart diagram of a CoMP measurement method according to an embodiment of the present invention. As shown in FIG. 6, the method includes the following steps:

S610: The base station configures a CoMP measurement set for the SCell by using an RRC connection reconfiguration message. The base station sends an RRC connection reconfiguration message to the UE, where the message carries a CoMP measurement set corresponding to the SCell configured to participate in the CoMP communication. Configuration of CoMP measurements for this SCell.

(1) For CoMP scenarios 1, 2, and 3, the CSI measurement is based on the CRS of the SCell and each of its CoMP cooperating network elements. The CoMP measurement set includes information of the SCell and information of the CoMP cooperative network element of the SCell. For example, the CoMP measurement set includes one of the following or any combination thereof: carrier frequency information of the SCell corresponding to the CoMP measurement set (eg, absolute radio frequency channel number, ARFCN), corresponding to the CoMP measurement set Cell index of SCell (ServCelllndex), physical cell identity of SCell (phySCellId). And the CoMP measurement set further includes one or any combination of the following: at least one CoMP Cooperative Cell Index (CoMPCelllndex), CoMP Cooperative Cell Physical Cell Identity (phySCellld).

(2) For CoMP scenario 4, the CSI measurement is based on the SCell and the CSI-RS of each CoMP cooperating network element, and thus the configuration content of the CoMP measurement set is different from the CoMP measurement set in CoMP scenarios 1, 2, and 3. Includes information about SCell and information about SCell's CoMP collaboration network elements. For example, the CoMP measurement set includes one of the following or any combination thereof: carrier frequency information (eg, ARFCN) of the SCell corresponding to the CoMP measurement set, cell index (ServCellIndex) of the SCell corresponding to the CoMP measurement set, and physicality of the SCell Cell ID ( phySCellld ). And the CoMP measurement set further includes one or any combination of the following: a CSI-RS configuration identifier (CSI-RS-Configld) or an index of the at least one CoMP cooperative network element and its corresponding CSI-RS configuration. The CSI-RS configuration includes one of the following information or any combination thereof: an antenna port configuration (antennaPortsCount), a resource, a resource configuration, a sub-module, a subframe configuration, and the like. Further, the CoMP measurement set may further include a CoMP measurement set identifier (compMeasSetld), used to identify the CoMP measurement set, and used in combination with the information of the above SCell to establish an association relationship between the CoMP measurement set and the SCell.

Further, the CoMP measurement set may further include a CQI report configuration, and each of the CoMP cooperation network elements of the serving cell and the serving cell respectively correspond to a CQI report configuration, where the CQI configuration includes one of the following contents: Or any combination thereof: channel quality indicator (CQI), precoding matrix indication (PMI), precoding type indication (PTI), rank indication (RI). These parameters are used in combination with the information of the above SCell CoMP cooperative network element for configuration. The CoMP measurement concentrates the CSI measurement and report information of each CoMP cooperative network element; in combination with the information of the SCell, it is used to configure the CSI measurement and the information of the SCell.

In the above embodiment, the base station transmits a CoMP measurement set to the UE through dedicated signaling. The dedicated signaling is RRC signaling, for example, a RRC connection reconfiguration message. The dedicated signaling may also be a MAC CE. Certainly, the present embodiment is not limited thereto, and the combination of RRC signaling and MAC CE may be used to separately transmit content in the CoMP measurement set, for example, configuring CSI measurement and report information by using RRC signaling, and specifying CoMP cooperation by using MAC CE. The cell index indicates which CCMP cooperative NEs need to measure and report CSI.

S620: The UE sends an RRC connection reconfiguration complete message to the base station.

S630: The UE measures and reports the CSI of the SCell and its CoMP cooperative network element (ie, the CoMP measurement set SCell and each CoMP cooperative network element) according to the configuration of the CoMP measurement set. Wherein the measurement and reporting are performed on a Physical Uplink Control Channel (PUCCH) or PUSCH.

According to the configuration of the CoMP measurement set in step S610, the CSI measurement includes one or any combination of the following: CQL PMI, PTL, and RI.

S640: When the SCell needs to be deactivated, the base station sends control signaling to the UE, to instruct the UE to stop performing CSI measurement on the SCell and the CoMP cooperative network element of the SCell according to the CoMP measurement set. The SCell is deactivated and can be triggered by the base station. It can also be triggered by the SCell. For example, the SCell deactivation timer running on the SCell times out. The embodiment of the present invention does not impose any limitation.

In addition, the control signaling may be, for example, a MAC CE. For the structure, refer to the embodiment shown in FIG. 3, and details are not described herein. The control signaling may also be a newly configured cell, and its structure is not limited as long as it can instruct the UE to start or stop the CSI measurement (or notify the UE that the SCell is activated or deactivated). The embodiment of the invention does not impose any limitation.

S650: The UE stops CSI measurement on the SCell and its CoMP cooperative network element (that is, all CoMP cooperative network elements in the CoMP measurement set corresponding to the SCell). Of course, the corresponding CSI measurement report was also stopped. The predetermined subframe may be an nth subframe (n is a positive integer) after the base station sends control signaling (or deactivates the SCell) to the UE. For example, in subframe n2 (n2 is an integer greater than or equal to 0), the base station sends a MAC CE to the UE, and the UE stops CSI measurement of the SCell and its CoMP cooperative network element in subframe n2+8 (in this case, n=8) And reports.

In the embodiment shown in FIG. 6, when the SCell needs to be deactivated, the base station can notify the UE by using a control signal, so that the UE can stop performing CSI measurement on the Coell and SCell CoMP cooperative network elements according to the CoMP measurement set. In this way, SCell's CoMP cooperative network element does not continue to perform CSI measurement according to the RRC configuration, which reduces invalid measurement and 4 reports, thereby reducing UE power consumption and waste of uplink signaling; in addition, by configuring the CoMP measurement set and The UE directly informs the UE to stop the CSI measurement of the CoMP cooperative network element of the SCell by using the control signaling, and avoids the operation of reconfiguring by using the RRC signaling each time the SCell is deactivated, thereby reducing the overhead of the RRC signaling.

Please refer to FIG. 7, which is a schematic flowchart of a CoMP measurement method according to an embodiment of the present invention. The difference from the embodiment shown in FIG. 6 is that the process of activating and deactivating the SCell is combined, as shown in the figure, including the following steps:

S710: The base station configures a CoMP measurement set for the SCell by using an RRC connection reconfiguration message; that is, The base station sends an RRC connection reconfiguration message to the UE, where the message carries a CoMP measurement set corresponding to the SCell configured to participate in the CoMP communication to implement configuration of the CoMP measurement of the SCell.

In scenarios 1, 2 and 3, the CSI measurements are based on the CRS of the serving cell and each of its CoMP cooperating network elements. Therefore, the CoMP measurement set in this embodiment is the same as the CoMP measurement set described in the scenes 1, 2, and 3, and will not be described herein.

In scenario 4, the CSI measurement based CSI-RS ₀ and each serving cell CoMP coordination NE Accordingly, the present embodiment CoMP measurement set in the embodiment shown in FIG. 6 for the embodiment CoMP scenario 4 described in The measurement set is the same and will not be described here.

S720: The UE sends an RRC connection reconfiguration complete message to the base station.

S730: The UE measures and reports the CSI of the SCell and its CoMP cooperative network element (ie, the CoMP measurement set SCell and each CoMP cooperative network element) according to the CoMP measurement set.

S740: In the subframe n3 (n3 is an integer greater than or equal to 0), the base station sends a control signaling for deactivating the SCell to the UE, and is used to instruct the UE to stop performing CSI on the CoMP cooperative network element of the SCell and the SCell according to the CoMP measurement set. measuring.

S750: The CSI measurement of the SCell and its CoMP cooperative network element (that is, all CoMP cooperative network elements in the CoMP measurement set corresponding to the SCell) is stopped in the subframe n3+n UE. Of course, the corresponding CSI measurement has also stopped.

S760: In the subframe n4 (n4 is an integer greater than or equal to 0), the SCell corresponding to the CoMP measurement set needs to be activated, and the base station sends control signaling for activating the SCell to the UE, and is used to instruct the UE to start to the SCell according to the CoMP measurement set. The CSI measurement is performed by the CoMP cooperative network element of SCell.

S770: Start CSI measurement on the SCell and its CoMP cooperative network element (that is, all CoMP cooperative network elements in the CoMP measurement set corresponding to the SCell) in the subframe n4+n UE. Of course, the corresponding report of CSI measurement is also started.

In this embodiment, the deactivation is the same as the activated SCell. If the deactivation is different from the activated SCell, the principle is the same as the above method. Because the base station is configured for different service cells Setting a different CoMP measurement set is different from the CoMP measurement set on which the CSI measurement is stopped and started.

In addition, for CoMP scenarios 1, 2, and 3, where the CoMP cooperative network elements have different cell IDs. At this time, the configuration of the CoMP measurement set can be configured according to the UE's RRM measurement report. That is, the base station configures the RRM measurement set for the UE, and configures the CoMP measurement set for the serving cell according to the RRM measurement report reported by the UE. A configuration method of the CoMP measurement set is described in detail below with reference to FIG. 8. As shown in FIG. 8, the method includes the following steps:

S810: The base station configures an RRM measurement set for the UE by using an RRC connection reconfiguration message.

The RRM measurement set includes one of the following or any combination thereof: a measurement identifier (measld), a measurement object identifier (measObjectld) and its corresponding measurement object configuration, a measurement configuration identifier (reportConfigld), and its corresponding measurement. Report configuration. among them:

The measurement object configuration includes one of the following or any combination thereof: carrier frequency information (for example, ARFCN), physical cell identifier (phySCellId), and cell index (celllndex) corresponding to PCell and SCell, respectively.

The measurement report configuration includes one of the following or any combination thereof: a periodic measurement report period, an event trigger type, and a corresponding threshold value, and the like.

S820: The UE sends an RRC connection reconfiguration complete message to the base station.

S830: The UE measures one of the following or any combination thereof according to the configuration of the RRM measurement set and based on the CRS: reference signal received power (RSRP) of the PCell, reference signal received quality (RSRQ) of the PCell, RSRP of the SCell, and RSRQ of the SCell RSRP of the same-frequency neighboring area of PCell, RSRQ of the same-frequency neighboring area of PCell, RSRP of the same-frequency neighboring area of SCell, and RSRQ of the same-frequency neighboring area of SCell. The RRM measurement report is sent to the base station after the measurement report trigger condition (period or event) is satisfied.

The RRM measurement report includes one or any combination of the following: a measurement identifier (measld), a physical cell identifier of one or more co-frequency neighbors of the PCell (phySCellld), one or more co-frequency neighbors of the PCell. Global cell identity (cellGlobalId), cell of SCell Index (ServCelllndex), the physical cell identifier (phySCellId) of one or more co-frequency neighbors of the SCell.

S840: The base station configures a CoMP measurement set for the SCell by using an RRC connection reconfiguration message according to the RRM measurement report reported by the UE. For example, the base station selects one or more network elements of the SCell co-frequency neighboring area RSRP or RSRQ whose measurement result is greater than the preset threshold as the CoMP cooperative network element of the SCell, and configures the CoMP measurement set for the SCell according to the selected cooperative network element, and configures the CoMP. The contents of the measurement set are described in (1).

For the CoMP scenario 4, the CoMP cooperating network elements have the same cell ID. At this time, the base station may configure a CoMP resource management set for the UE, the UE performs measurement according to the CoMP resource management set, and sends a measurement report, and the base station configures the CoMP measurement set for the SCell according to the measurement report. A configuration method of the CoMP measurement set is described in detail below with reference to FIG. 9. As shown in FIG. 9, the method includes the following steps:

S910: The base station configures, by the RRC connection reconfiguration message, a CoMP resource management set corresponding to the SCell by the UE.

The CoMP resource management set includes one or any combination of the following: a measurement identifier (measld), a measurement object identifier (measObjectld) and its corresponding measurement object configuration, a measurement report configuration identifier (reactionConfigld), and its corresponding measurement report configuration. among them:

The measurement object configuration includes one or any combination of the following: carrier frequency information corresponding to the SCell (eg, ARFCN), CSI-RS configuration identifier (CSI-RS-Confi _g Id ), one or more CSI-RSs Configure the index, one or more CSI-RS configuration information. The CSI-RS configuration information includes one or any combination of the following: antenna port configuration (antennaPortsCount), resource configuration (resourceConfig), subframe configuration (frameConfig), and the like. The measurement report configuration includes one or more of the following contents: a periodic measurement report period, an event trigger type, and a corresponding threshold value.

S920: The UE sends an RRC connection reconfiguration complete message to the base station.

S930: The UE is configured according to a CoMP resource management set corresponding to the SCell, and is based on the CSI-RS. The RSRP and/or RSRQ corresponding to each CSI-RS configuration in the CoMP resource management set is measured. After the measurement report trigger condition (period or event) is satisfied, the measurement report is sent to the base station, and the measurement report includes one of the following or any combination thereof: the measurement identifier (measld), the cell index of the SCell (ServCelllndex), one or more of the SCell The CSI-RS configuration identifier (CSI-RS-Configld), the RSRP corresponding to one or more CSI-RS configuration identifiers of the SCell, and the RSRQ corresponding to one or more CSI-RS configuration identifiers of the SCell.

After deactivating the SCell, the UE uses a longer measurement period for the RSRP and/or RSRQ measurement of the CSI-RS in the CoMP resource management set associated with the SCell, for example, 5 times the measurement period when the SCell is in an active state; or stops CSI-RS based RSRP and / or RSRQ measurements.

After the SCell is activated, the UE measures the RSRP and/or RSRQ measurement of the CSI-RS in the CoMP resource management set associated with the SCell to use the measurement period of the active state SCell; or starts the CRP-RS based RSRP and/or RSRQ measurement.

S940: The base station configures a CoMP measurement set for the SCell by using an RRC connection reconfiguration message according to the measurement report reported by the UE. For example, the base station selects one or more network elements whose RSRP and/or RSRQ measurement results corresponding to the CSI-RS configuration identifier (CSI-RS-Configld) of the SCell in the CoMP resource management set of the SCell is greater than the preset threshold, and serves as the CoMP collaboration network of the SCell. Element, the CoMP measurement set is configured for the SCell according to the selected cooperative network element. See the description in (2) for the configuration of the CoMP measurement set. Example. The embodiments of the present invention are applicable to base stations or UEs in various communication systems.

Please refer to FIG. 10 , which is a functional block diagram of a base station according to an embodiment of the present invention. As shown, the base station includes a transmitting unit 101 and a control unit 102. The sending unit 101 is configured to send a CoMP measurement set to the UE, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information about the serving cell and information of a CoMP cooperative network element of the serving cell; The control signaling is sent by the sending unit 101, where the control signaling is used to indicate that the UE stops according to the CoMP measurement set. Or start performing CSI measurement on the CoMP cooperative network element of the serving cell.

It should be noted that when the serving cell of the above embodiment is a PCell, since the PCell needs to remain in the active state at all times, it is not necessary to stop or restart the CSI measurement for the PCell. When the serving cell of the above embodiment is a SCell, and the SCell needs to be deactivated or activated, the UE needs to stop or start CSI measurement on the SCell itself, in addition to stopping CSI measurement on the SCell cooperative network element. At this time, the control signaling is further used to instruct the UE to stop or start performing CSI measurement on the SCell. That is, when the monthly service cell is an SCell and needs to be deactivated or activated, the control unit 102 is configured to generate a CoMP collaboration network that instructs the UE to stop or start the SCell and the SCell according to the CoMP measurement set. Control signaling for performing CSI measurement; or when the serving cell is a PCell and needs to stop or start CoMP communication, the control unit is configured to generate the indication

Control signaling for CSI measurements.

In hardware implementation, the above sending unit 101 may be a transmitter or a transceiver, and the above control unit 102 may be embedded in the processor of the base station in hardware or software. The processor can be a central processing unit (CPU) or a microcontroller.

Please refer to FIG. 11 , which is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown, the base station includes a transmitter 111, a memory 112, and a processor 113 coupled to the transmitter 111 and the memory 112, respectively. Of course, the base station may also include a general component such as a receiver, an antenna, a baseband processing component, a medium-frequency processing component, an input/output device, and the like, and the embodiment of the present invention is not limited thereto.

The memory 112 stores a CoMP measurement set and a set of program codes, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information of the serving cell and information of a CoMP cooperative network element of the serving cell. And the processor 113 is configured to call the program code stored in the memory 112, and is configured to perform the following operations:

Transmitting the CoMP measurement set to the UE through the transmitter 111;

Generating control signaling, the control signaling being used to indicate that the UE is measured according to the CoMP The set stops or starts to perform CSI measurement on the CoMP cooperative network element of the serving cell; and sends the control signaling to the UE by using the transmitter 111.

The processor executes the program code generation control signaling when: the serving unit is an SCell and needs to be deactivated or activated, the control unit 102 is configured to generate the indication that the UE stops or starts according to the CoMP measurement set. The SCell and the CoMP cooperative network element of the SCell perform control signaling for CSI measurement; or when the serving cell is a PCell and needs to stop or start CoMP communication, the control unit is configured to generate, according to the The CoMP measurement set needs to be described. The base station shown in FIG. 10 and FIG. 11 may be used to implement any of the methods provided by the foregoing method embodiments, and information about the serving cell and the serving cell

The description of the information of the CoMP, the CSI measurement, the CoMP measurement set, the control signaling, and the like are the same as the above method embodiments, and details are not described herein again.

Please refer to FIG. 12, which is a functional block diagram of a UE according to an embodiment of the present invention. As shown, the UE includes a receiving unit 121, a measuring unit 122, and a control unit 123. The receiving unit 121 is configured to receive a CoMP measurement set sent by the base station, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information about the serving cell and a CoMP cooperative network element of the serving cell. The receiving unit 121 is further configured to receive the control signaling sent by the base station, and the measuring unit 122 is configured to perform CSI measurement on the serving cell and the CoMP cooperative network element of the serving cell according to the CoMP measurement set. The control unit 123 is configured to control, according to the control signaling and the CoMP measurement set, the measurement unit 122 to stop or start performing CSI measurement on the CoMP cooperative network element of the serving cell.

When the serving cell is an SCell and needs to be deactivated or when the serving cell is a PCell and needs to stop CoMP communication, the control unit 123 is configured to control the measurement unit 122 to stop the CoMP cooperative network element of the serving cell. Perform CSI measurements. When the serving cell is an SCell and needs to be activated or when the serving cell is a PCell and needs to start CoMP communication, the control unit 123 is configured to control the measurement unit 122 to start a CoMP collaboration network for the serving cell. The element performs CSI measurement.

In hardware implementation, the above receiving unit 121 may be a receiver or a transceiver, and the above measuring unit 122 and the control unit 123 may be embedded in the processor of the base station in hardware or software. The processor can be either a CPU or a microcontroller.

Please refer to FIG. 13, which is a schematic structural diagram of a UE according to an embodiment of the present invention. As shown, the UE includes a receiver 131, a memory 132, and a processor 133 coupled to the receiver 131 and the memory 132, respectively. Of course, the UE may further include a common component such as a receiver, an antenna, a baseband processing component, a medium-frequency processing component, an input/output device, and the like, and the embodiment of the present invention is not limited thereto.

The memory 132 stores a set of program codes, and the processor 133 calls the program code stored in the memory to perform the following operations:

Receiving, by the receiver 131, a CoMP measurement set sent by the base station, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information of the serving cell and information of a CoMP cooperative network element of the serving cell;

Receiving, by the receiver 131, control signaling sent by the base station;

Performing CSI measurement on the CoMP cooperative network element of the serving cell according to the control signaling and the CoMP measurement set.

It should be noted that the UE shown in FIG. 12 and FIG. 13 may be used to implement any of the methods provided by the foregoing method embodiments, and information about the serving cell and information of a CoMP cooperative network element of the serving cell. The description of the CSI measurement, the CoMP measurement set, the control signaling, and the like are the same as the foregoing method embodiments, and details are not described herein again.

Through the description of the above embodiments, it will be apparent to those skilled in the art that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. The computer readable medium includes a computer storage medium and a communication medium, wherein the communication medium includes a convenient transfer from one place to another Any medium of a computer program. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwaves are included in the fixing of the associated media. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

In summary, the above description is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

1. A collaborative multipoint measurement method, comprising:

The base station sends a coordinated multi-point CoMP measurement set to the user equipment UE, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information of the serving cell and information of a CoMP cooperative network element of the serving cell;

The base station sends control signaling to the UE, where the control signaling is used to instruct the UE to stop or start performing channel state information CSI measurement on a CoMP cooperative network element of the serving cell according to the CoMP measurement set.

2. The method according to claim 1, the serving cell is a secondary serving cell, and the control signaling is deactivation signaling or activation signaling of the secondary serving cell, where the deactivation signaling Instructing the UE to stop performing CSI measurement on the CoMP cooperative network element of the serving cell according to the CoMP measurement set, where the activation signaling is used to instruct the UE to start to the serving cell according to the CoMP measurement set. The CoMP cooperative network element performs CSI measurement.

The method according to claim 1 or 2, when the serving cell is a secondary serving cell, the control signaling is further used to indicate that the UE stops or starts performing CSI measurement on the secondary serving cell.

The method according to any one of claims 1 to 3, wherein the information of the serving cell and the information of the CoMP cooperation network element of the serving cell include one or any combination of the following:

Cell index, cell identity or frequency information.

The method according to any one of claims 1 to 4, wherein the CoMP measurement set further comprises a CoMP measurement set identifier.

The method according to any one of claims 1 to 5, wherein the CoMP measurement set further comprises a channel quality indication CQI report configuration, the CQI report configuration comprising one or any combination of the following:

The CQL precoding matrix indicates PMI, precoding type indication PTI, and rank indication RI.

The method according to any one of claims 1 to 6, wherein the control signaling is further used to indicate that the UE stops or starts to serve the service according to the CoMP measurement set in a predetermined subframe. The CoMP cooperative network element of the area performs CSI measurement.

The method according to any one of claims 1 to 7, the base station sends the CoMP measurement set to a UE by using dedicated signaling, where the dedicated signaling includes a radio resource control connection reconfiguration message or a medium access control The layer controls the cell MAC CE.

9. The method according to any one of claims 1 to 8, the control signaling being a MAC CE.

10. A collaborative multipoint measurement method, including:

The user equipment UE receives the coordinated multi-point CoMP measurement set sent by the base station, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information of the serving cell and information of a CoMP cooperative network element of the serving cell;

Receiving, by the UE, control signaling sent by the base station, and stopping or starting to perform channel state information CSI measurement on a CoMP cooperative network element of the serving cell according to the control signaling and the CoMP measurement set.

The method according to claim 10, the serving cell is a secondary serving cell, and the control signaling is deactivation signaling or activation signaling of the secondary serving cell, and the UE is according to the The activation signaling and the CoMP measurement set stop performing CSI measurement on the CoMP cooperative network element of the serving cell, or the UE starts to perform CoMP cooperation network element of the serving cell according to the activation signaling and the CoMP measurement set. CSI measurement.

The method according to claim 10 or 11, when the serving cell is a secondary serving cell, the control signaling is further used to indicate that the UE stops or starts performing CSI measurement on the secondary serving cell.

The method according to any one of claims 10 to 12, wherein the information of the serving cell and the information of the CoMP cooperative network element of the serving cell include one or any combination of the following: a cell index, a cell identifier, or Frequency information.

14. The method of any of claims 10 to 13, the CoMP measurement set further comprising a CoMP measurement set identification.

The method according to any one of claims 10 to 14, wherein the CoMP measurement set is further included The channel quality indication CQI report configuration, the CQI report configuration includes one or any combination of the following:

The method according to any one of claims 10 to 15, wherein the UE stops or starts to perform CSI measurement on a CoMP cooperative network element of the secondary serving cell in a predetermined subframe.

The method according to any one of claims 10 to 16, wherein the UE receives the CoMP measurement set by using dedicated signaling, where the dedicated signaling includes a radio resource control connection reconfiguration message or a medium access control layer control Cell MAC CE.

The method according to any one of claims 10 to 17, wherein the control signaling is MAC

CE.

19. A base station comprising:

a sending unit, configured to send, to the user equipment UE, a coordinated multi-point CoMP measurement set, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information about the serving cell and a CoMP cooperative network element of the serving cell Information;

a control unit, configured to generate control signaling, and send the control signaling to the UE by using the sending unit, where the control signaling is used to indicate that the UE stops or starts to start according to the CoMP measurement set. The CoMP cooperative network element of the serving cell performs channel state information CSI measurement.

The base station according to claim 19, the serving cell is a secondary serving cell, and the control signaling is deactivation signaling or activation signaling of the secondary serving cell, where the deactivation signaling Instructing the UE to stop performing CSI measurement on the CoMP cooperative network element of the serving cell according to the CoMP measurement set, where the activation signaling is used to instruct the UE to start to the serving cell according to the CoMP measurement set. The CoMP cooperative network element performs CSI measurement.

The base station according to claim 19 or 20, when the serving cell is a secondary serving cell, the control signaling is further used to indicate that the UE stops or starts performing CSI measurement on the secondary serving cell.

The method according to any one of claims 19 to 21, wherein the information of the serving cell and the information of the CoMP cooperative network element of the serving cell include one or any combination of the following: a cell index, a cell identifier, or Frequency information.

23. The base station according to any one of claims 19 to 22, the CoMP measurement set further comprising a CoMP measurement set identifier.

24. The base station according to any one of claims 19 to 23, the CoMP measurement set further comprising a channel quality indication CQI report configuration, the CQI report configuration comprising one or any combination of the following:

The base station according to any one of claims 19 to 24, wherein the control signaling is further used to indicate that the UE stops or starts a CoMP cooperative network to the serving cell in a predetermined subframe according to the CoMP measurement set. The element performs CSI measurement.

The base station according to any one of claims 19 to 25, wherein the sending unit is further configured to send a CoMP measurement set to the UE by using dedicated signaling, where the dedicated signaling includes a radio resource control connection reconfiguration message or The media access control layer controls the cell MAC CE.

The base station according to any one of claims 19 to 26, wherein the control signaling is a MAC

CE.

28. A user equipment UE, comprising:

a receiving unit, configured to receive a coordinated multi-point CoMP measurement set sent by the base station, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information about the serving cell and a CoMP cooperative network element of the serving cell Information

The receiving unit is further configured to receive control signaling sent by the base station;

a measuring unit, configured to perform CSI measurement on the serving cell and the CoMP cooperative network element of the serving cell according to the CoMP measurement set;

a control unit, configured to control, according to the control signaling and the CoMP measurement set, the measurement unit to stop or start channel state information on a CoMP cooperative network element of the serving cell CSI measurement.

The UE according to claim 28, wherein the serving cell is a secondary serving cell, and the control signaling is deactivation signaling or activation signaling of the secondary serving cell, and the control unit is further configured to: Deactivating signaling and the CoMP measurement set controlling the measurement unit to stop performing CSI measurement on a CoMP cooperative network element of the serving cell, or further for controlling the measurement according to the activation signaling and a CoMP measurement set The unit begins to perform CSI measurement on the CoMP cooperative network element of the serving cell.

The UE according to claim 28 or 29, when the serving cell is a secondary serving cell, the control unit is further configured to control the measuring unit to stop or start performing CSI measurement on the secondary serving cell.

The UE according to any one of claims 28 to 30, the information of the serving cell and the information of the CoMP cooperative network element of the serving cell include one or any combination of the following: a cell index, a cell identifier, or Frequency information.

32. The UE according to any one of claims 28 to 31, wherein the CoMP measurement set further comprises a CoMP measurement set identifier.

33. The UE according to any one of claims 28 to 32, the CoMP measurement set further comprising a channel quality indication CQI report configuration, the CQI report configuration comprising one or any combination of the following:

The UE according to any one of claims 28 to 33, wherein the control unit controls the measurement unit to stop or start performing CSI measurement on a CoMP cooperative network element of the secondary serving cell in a predetermined subframe.

The UE according to any one of claims 28 to 34, the receiving unit receives the CoMP measurement set by using dedicated signaling, where the dedicated signaling includes a radio resource control connection reconfiguration message or a media access control layer Control cell MAC CE.

The UE according to any one of claims 28 to 35, wherein the control signaling is a MAC CE.

37. A base station comprising a transmitter, a memory, and a processor coupled to the transmitter and memory, respectively, wherein the memory stores a set of program codes and a coordinated multipoint CoMP measurement set, the CoMP measurement set corresponding to a service a cell, and the CoMP measurement set includes information of the serving cell and information of a CoMP cooperative network element of the serving cell; the processor invokes a program code stored in the memory, to perform the following operations:

Transmitting, by the transmitter, the CoMP measurement set to a user equipment UE;

Generating control signaling, the control signaling is used to instruct the UE to stop or start performing channel state information CSI measurement on the CoMP cooperative network element of the serving cell according to the CoMP measurement set;

The control signaling is sent to the UE by the transmitter.

38. A user equipment UE, comprising a receiver, a memory, and a processor coupled to the receiver and the memory, respectively, wherein the memory stores a set of program codes, the processor invoking program code stored in the memory , to do the following:

Receiving, by the receiver, a coordinated multi-point CoMP measurement set sent by the base station, where the CoMP measurement set corresponds to a serving cell, and the CoMP measurement set includes information of the serving cell and a CoMP cooperative network element of the serving cell Information

Receiving, by the receiver, control signaling sent by the base station;

And stopping or starting to perform channel state information CSI measurement on the CoMP cooperative network element of the serving cell according to the control signaling and the CoMP measurement set.

A computer program product comprising a computer readable medium, the readable medium comprising a set of program code for performing the CoMP measurement method according to any one of claims 1 to 18.