WO2016107232A1

WO2016107232A1 - Coordinated multiple points transmission/reception implementation method and device

Info

Publication number: WO2016107232A1
Application number: PCT/CN2015/090570
Authority: WO
Inventors: 吴刚
Original assignee: 大唐移动通信设备有限公司
Priority date: 2014-12-30
Filing date: 2015-09-24
Publication date: 2016-07-07
Also published as: CN104506292A

Abstract

The present invention relates to a communications technology, and in particular, to a coordinated multiple points transmission/reception implementation method and device, which are used for triggering coordinated multiple points transmission/reception at the right time. The method is that: in embodiments of the present invention, a network side uses a terminal report result obtained based on A3 event measurement as a determining foundation for triggering coordinated multiple points transmission/reception. Therefore, the network side can accurately sense whether a terminal arrives at the edge of a cell and sense that the terminal is located in overlapped areas of which cells, so that coordinated multiple points transmission/reception can be triggered in time at the right time, further data transmission quality of the terminal can be ensured, and meanwhile service quality of a system can be effectively ensured. Besides, the solution can meet existing protocols and a terminal side does not need to be modified too much, thereby saving a large number of development and maintenance costs.

Description

Method and device for implementing multi-point coordinated transmission

This application claims the priority of the Chinese Patent Application filed on Dec. 30, 2014, the Chinese Patent Office, Application No. 201410851158.X, entitled "A Method and Apparatus for Implementing Multi-Point Collaborative Transmission", the entire contents of which are The citations are incorporated herein by reference.

Technical field

The present invention relates to communication technologies, and in particular, to a method and an apparatus for implementing multipoint coordinated transmission.

Background technique

The uplink and downlink of the Long Term Evolution (LTE) system are based on Orthogonal Frequency Division Multiplexing (OFDM) orthogonal multiple access. Therefore, for LTE systems, between cells Interference becomes the main disturbance. Current research shows that multi-point cooperative transmission technology can reduce inter-cell interference, improve the spectrum efficiency of the system, and especially improve the spectrum efficiency of cell edge users.

Referring to FIG. 1 , Coordinated Multiple Points Transmission/Reception (COMP) refers to multiple transmission points separated geographically and cooperatively participate in data transmission of one terminal (eg, physical downlink shared channel ( The Physical Downlink Shared Channel (PDSCH) transmits or transmits data transmitted by one terminal (for example, Physical Uplink Shared Channel (PUSCH) transmission).

One of the keys to multipoint collaboration technology is the ability to find a set of coordinated cells for the user, that is, to intelligently determine whether the terminal is at the cell edge. However, in the prior art, only the difference between the reference signal received power (RSRP) of the current serving cell and the neighboring cell of the determined terminal can be determined by the relevant standard to determine whether the current location of the terminal is suitable. Multi-point coordinated transmission, but does not explain how to get this difference, and if you use this difference.

In view of this, it is necessary to design a complete solution to achieve the above scenario.

Summary of the invention

Embodiments of the present invention provide a method and an apparatus for implementing coordinated multi-point transmission, which are used to trigger multi-point coordinated transmission at an accurate timing.

The specific technical solutions provided by the embodiments of the present invention are as follows:

The first aspect, a method for implementing coordinated multi-point transmission, includes:

The network side configures an A3 measurement event for the terminal, and instructs the terminal to perform channel quality measurement of the neighboring cell.

The network side receives the A3 event measurement report fed back by the terminal;

The network side triggers multi-point coordinated transmission for the at least one neighboring cell when determining that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold based on the A3 event measurement report.

In the embodiment of the present invention, the network side uses the terminal reporting result obtained by the A3 event measurement as the decision basis for triggering the coordinated multi-point transmission, so that the network side can accurately detect whether the terminal has reached the cell edge and which cells are in the cell. The overlapping area can trigger multi-point coordinated transmission in an accurate time, thereby ensuring the data transmission quality of the terminal and effectively guaranteeing the service quality of the system; and the solution conforms to the existing protocol and does not need to be the terminal. Too many modifications on the side can save a lot of development and maintenance costs.

With reference to the first aspect, in a first possible implementation manner, the network side configures an A3 measurement event for the terminal, including:

The network side sends an RRCConnectionReconfiguration message to the terminal to measure the event for the terminal A3.

With reference to the first aspect, in a second possible implementation manner, the network side receives an A3 event measurement report that is sent by the terminal, and determines, according to the A3 event measurement report, a difference between a channel quality of the at least one neighboring cell and a channel quality of the serving cell. The value reaches the set threshold, including:

When receiving the A3 event measurement report sent by the terminal, the network side directly determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold; or

After receiving the A3 event measurement report sent by the terminal, the network side determines the channel state of each neighboring cell according to the channel quality measurement result of each neighboring cell recorded in the A3 event measurement report, and determines the status of any neighboring cell. When the channel state satisfies the formula 1, determining that the difference between the channel quality of the any neighboring cell and the channel quality of the serving cell reaches a set threshold;

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

Where Mn is a channel quality measurement result that does not consider calculating a neighboring cell under any bias; Ofn is an offset corresponding to a specific frequency of a neighboring cell; Ocn is a cell-specific offset of a neighboring cell; Ms is a calculation for not considering any offset Channel quality measurement result of the serving cell; Ofs is the offset corresponding to the specific frequency of the serving cell; Ocs is the cell-specific offset of the serving cell; Hys is the lag parameter of the preset neighboring cell channel quality measurement event; The offset parameter of the channel quality measurement event of the neighboring cell.

With reference to the first aspect or any one of the foregoing possible implementation manners of the foregoing aspect, in a third possible implementation manner, the network side determines, according to the A3 event measurement report of the terminal feedback, the channel quality of the at least one neighboring cell and the serving cell. After the difference of the channel quality reaches the set threshold, before triggering the multi-point coordinated transmission for the at least one neighboring cell, the method includes:

Further determining whether the spectrum efficiency of the serving cell is lower than a set threshold, and determining that the multi-point coordinated transmission is allowed to be triggered when determining that the frequency efficiency of the serving cell is lower than a set threshold.

With reference to the first aspect or any one of the foregoing possible implementation manners of the foregoing aspect, in a third possible implementation manner, the method further includes:

The network side determines, according to the notification of the terminal, that the channel state of any neighboring cell satisfies the formula 2, and ends the coordinated multi-point transmission of the any neighboring cell:

Mn+Ofn+Ocn-Hy<Ms+Ofs+Ocs+Off Equation 2

In a second aspect, an apparatus for implementing coordinated multi-point transmission includes:

a sending unit, configured to configure an A3 measurement event for the terminal, and instruct the terminal to perform channel quality measurement of the neighboring cell;

a receiving unit, configured to receive an A3 event measurement report fed back by the terminal;

And a processing unit, configured to trigger multi-point coordinated transmission for the at least one neighboring cell when determining, according to the A3 event measurement report, that a difference between a channel quality of the at least one neighboring cell and a channel quality of the serving cell reaches a set threshold.

With reference to the second aspect, in a first possible implementation, when the A3 measurement event is configured for the terminal, the sending unit is specifically configured to include:

An RRCConnectionReconfiguration message is sent to the terminal to configure an A3 measurement event for the terminal.

With reference to the second aspect, in a second possible implementation, the A3 event measurement report fed back by the terminal is received, and the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell is determined based on the A3 event measurement report. When the threshold is set, the processing unit is specifically used to

When the receiving unit receives the A3 event measurement report sent by the terminal, directly determining that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold; or

After receiving the A3 event measurement report sent by the terminal, the receiving unit determines the channel state of each neighboring cell according to the channel quality measurement result of each neighboring cell recorded in the A3 event measurement report, and determines any neighbor. When the channel state of the cell satisfies the formula 1, the channel quality and the serving cell of the any neighboring cell are determined. The difference in channel quality reaches a set threshold;

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

With reference to the second aspect or any one of the foregoing possible implementation manners of the second aspect, in a third possible implementation manner, the processing unit determines, according to the A3 event measurement report that is fed back by the terminal, the channel quality and service of the at least one neighboring cell. After the difference of the channel quality of the cell reaches a set threshold, before triggering the multi-point coordinated transmission for the at least one neighboring cell, the method is further used to:

With reference to the second aspect or any one of the foregoing possible implementation manners of the second aspect, in a fourth possible implementation, the processing unit is further configured to:

According to the notification of the terminal, when the channel state of any neighboring cell satisfies the formula 2, the multi-point coordinated transmission of the any neighboring cell ends:

Mn+Ofn+Ocn-Hy<Ms+Ofs+Ocs+Off Equation 2

In a third aspect, an apparatus for implementing coordinated multi-point transmission includes:

a sending port, configured to configure an A3 measurement event for the terminal, and instruct the terminal to perform channel quality measurement of the neighboring cell;

a receiving port, configured to receive an A3 event measurement report fed back by the terminal;

And a processor, configured to trigger multi-point coordinated transmission for the at least one neighboring cell when determining, according to the A3 event measurement report, that a difference between a channel quality of the at least one neighboring cell and a channel quality of the serving cell reaches a set threshold.

In the embodiment of the present invention, the network side uses the terminal reporting result obtained by the A3 event measurement as the decision basis for triggering the coordinated multi-point transmission, so that the network side can accurately detect whether the terminal has reached the cell edge and which cells are in the cell. Overlapping areas, which enable multi-point coordinated transmissions to be triggered in an accurate time, thus ensuring The quality of the data transmission of the terminal and the quality of service of the system are effectively guaranteed; and the solution not only conforms to the existing protocol, but also does not need to make too many modifications to the terminal side, which can save a lot of development and maintenance costs.

With reference to the third aspect, in a first possible implementation, when the A3 measurement event is configured for the terminal, the sending port is specifically configured to include:

With reference to the third aspect, in a second possible implementation manner, the A3 event measurement report that is sent by the terminal is received, and the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell is determined based on the A3 event measurement report. When the threshold is set, the processor is specifically configured to:

When receiving the A3 event measurement report sent by the terminal, the receiving port directly determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold; or

After receiving the A3 event measurement report sent by the terminal, the receiving port determines the channel state of each neighboring cell according to the channel quality measurement result of each neighboring cell recorded in the A3 event measurement report, and determines any neighbor. When the channel state of the cell satisfies the formula 1, determining that the difference between the channel quality of the any neighboring cell and the channel quality of the serving cell reaches a set threshold;

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

With reference to the third aspect or any one of the foregoing possible implementation manners of the foregoing aspect, in a third possible implementation manner, the determining, by the processor, the channel quality and service of the at least one neighboring cell based on the A3 event measurement report fed back by the terminal After the difference of the channel quality of the cell reaches a set threshold, before triggering the multi-point coordinated transmission for the at least one neighboring cell, the method is further used to:

With reference to the third aspect or any one of the foregoing possible implementation manners of the third aspect, in a fourth possible implementation, the processor is further configured to:

Mn+Ofn+Ocn-Hy<Ms+Ofs+Ocs+Off Equation 2

Where Mn is a channel quality measurement result that does not consider calculating a neighboring cell under any bias; Ifn is a neighboring cell The offset corresponding to the specific frequency; Ocn is the cell-specific offset of the neighboring cell; Ms is the channel quality measurement result of the serving cell without considering any bias; Ofs is the offset corresponding to the specific frequency of the serving cell; Ocs is the service Cell-specific offset of the cell; Hys is a lag parameter of the preset neighbor cell channel quality measurement event; Off is an offset parameter of the preset neighbor cell channel quality measurement event.

In a fourth aspect, an apparatus for implementing coordinated multi-point transmission includes:

A processor for reading a program in the memory, performing the following process:

Configuring A3 measurement events for the terminal, and instructing the terminal to perform channel quality measurement of the neighboring cell through the transceiver;

Receiving an A3 event measurement report fed back by the terminal through the transceiver;

And determining, according to the A3 event measurement report, that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold, triggering the coordinated multi-point transmission for the at least one neighboring cell.

A transceiver for receiving and transmitting data under the control of a processor.

With reference to the fourth aspect, in a first possible implementation, when the A3 measurement event is configured for the terminal, the processor is specifically configured to include:

The RRCConnectionReconfiguration message is sent to the terminal through the transceiver to configure the A3 measurement event for the terminal.

With reference to the fourth aspect, in a second possible implementation manner, the A3 event measurement report that is sent by the terminal is received, and the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell is determined based on the A3 event measurement report. When the threshold is set, the processor is specifically configured to:

When the transceiver receives the A3 event measurement report sent by the terminal, directly determining that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold; or

After receiving the A3 event measurement report sent by the terminal, the transceiver determines the channel state of each neighboring cell according to the channel quality measurement result of each neighboring cell recorded in the A3 event measurement report, and determines any neighbor. When the channel state of the cell satisfies the formula 1, determining that the difference between the channel quality of the any neighboring cell and the channel quality of the serving cell reaches a set threshold;

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

With reference to the fourth aspect, or any one of the foregoing possible implementation manners of the fourth aspect, in a third possible implementation, the determining, by the processor, the channel quality and service of the at least one neighboring cell based on the A3 event measurement report fed back by the terminal After the difference of the channel quality of the cell reaches a set threshold, before triggering the multi-point coordinated transmission for the at least one neighboring cell, the method is further used to:

With reference to the fourth aspect, or any one of the foregoing possible implementation manners of the fourth aspect, in a fourth possible implementation, the processor is further configured to:

Mn+Ofn+Ocn-Hy<Ms+Ofs+Ocs+Off Equation 2

DRAWINGS

1 is a schematic diagram of multipoint coordinated transmission in the prior art;

2 is a flowchart of coordinated multi-point transmission in an embodiment of the present invention;

3, FIG. 4 and FIG. 5 are schematic diagrams showing the structure of a network side device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division. Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) System, Universal Mobile Telecommunication System (UMTS), etc.

It should be understood that, in the embodiment of the present invention, user equipment (UE) includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), and a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular" The telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.

In an embodiment of the invention, a base station (e.g., an access point) may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited.

In the embodiment of the present invention, the network side sends an A3 event measurement request to the terminal, and the terminal is configured to perform channel quality measurement on the neighboring cell based on the A3 event measurement request, and according to the A3 event fed back by the terminal. When the measurement report determines that the channel state of the at least one neighboring cell meets the requirement of the coordinated transmission, the coordinated transmission procedure is triggered for the at least one neighboring cell.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 2, in the embodiment of the present invention, the implementation process of multipoint coordinated transmission is as follows:

Step 200: The network side configures an A3 measurement event for the terminal, and instructs the terminal to perform neighbor cell channel quality measurement.

In the embodiment of the present invention, in the LTE system, the network side uses the A3 event as a decision basis for triggering multi-point coordinated transmission. In practical applications, the A3 event is a measurement report in the LTE system, that is, when the terminal finds that the channel quality of the neighboring cell is better than the information quality of the serving cell, and the difference reaches a certain threshold, the A3 measurement is sent to the base station. report.

On the other hand, in this embodiment, the network side may send a radio resource control connection configuration (RRCConnectionReconfiguration) message to the terminal to configure an A3 measurement event for the terminal. When receiving the RRCConnectionReconfiguration message, the terminal starts to perform channel quality measurement on each neighboring cell of the serving cell to which it belongs, and records the channel quality measurement result of each neighboring cell.

When the terminal performs channel quality measurement, it mainly measures the Reference Signal Received Power (RSRP).

Step 210: The network side receives the A3 event measurement report fed back by the terminal, and determines, according to the A3 event measurement report, that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold.

In this embodiment, when performing step 210, the network side may adopt, but is not limited to, the following methods:

The first mode is: when the network side receives the A3 event measurement report sent by the terminal, it directly determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold.

In this case, the terminal performs channel quality measurement on each neighboring cell according to the indication on the network side, and returns an A3 event measurement report to the network side when determining that at least one neighboring cell channel quality satisfies the following formula 1. After receiving the A3 event measurement report, the network side may directly determine that the difference between the channel quality of at least one neighboring cell and the channel quality of the serving cell reaches a set threshold. The formula one is as follows:

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

Where Mn is a channel quality measurement result that does not consider calculating a neighboring cell under any bias;

The offset corresponding to the specific frequency of the neighboring cell; Ocn is the cell-specific offset of the neighboring cell. If this parameter is not configured for the neighboring cell, it is set to zero; Ms is the channel quality measurement of the serving cell without considering any bias. The result is that Offs is the offset corresponding to the specific frequency of the serving cell; Ocs is the cell-specific offset of the serving cell, and if no parameter is configured for the serving cell, it is set to zero; Hys is the preset neighboring cell channel quality measurement event. The lag parameter; Off is the offset parameter of the preset neighbor cell channel quality measurement event. When RSRP is indicated, the unit of Mn and Ms is dBm. When the reference signal received quality (RSRQ) Mn is expressed, the unit of Ms is dB; the unit of Ofn, Ocn, Ofs, Ocs, Hys, Off is dB. .

The second mode is: after receiving the A3 event measurement report sent by the terminal, the network side determines the channel state of each neighboring cell according to the channel quality measurement result of each neighboring cell recorded in the A3 event measurement report. When it is determined that the channel state of any neighboring cell satisfies the formula 1, it is determined that the difference between the channel quality of the any neighboring cell and the channel quality of the serving cell reaches a set threshold.

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

Where Mn is a channel quality measurement result that does not consider calculating a neighboring cell under any bias; Ofn is an offset corresponding to a specific frequency of the neighboring cell (ie, offsetFreq is defined as being in measObjectEUTRA)

Corresponding to the frequency of the neighboring cell); Ocn is the cell-specific offset of the neighboring cell (ie, cellIndividualOffset is defined as the frequency corresponding to the neighboring cell in measObjectEUTRA), and if this parameter is not configured for the neighboring cell, it is set to zero; Ms is The channel quality measurement result of the serving cell under any offset is not considered; Ofs is the offset corresponding to the specific frequency of the serving cell (ie, offsetFreq is defined as the frequency corresponding to the serving cell in measObjectEUTRA); Ocs is the cell of the serving cell Specific offset (ie cellIndividualOffset is in measObjectEUTRA) Defined as the frequency corresponding to the serving cell), if this parameter is not configured for the serving cell, set to zero; Hys is the lag parameter of the preset neighbor cell channel quality measurement event (ie hysteresis is defined as the neighboring cell in reportConfigEUTRA) The parameter of the channel quality measurement event); Off is the offset parameter of the preset neighbor cell channel quality measurement event (ie, a3-Offset is defined in the reportConfigEUTRA as a parameter for the neighbor cell channel quality measurement event). When RSRP is indicated, the unit of Mn and Ms is dBm. When the reference signal received quality (RSRQ) Mn is expressed, the unit of Ms is dB; the unit of Ofn, Ocn, Ofs, Ocs, Hys, Off is dB. .

Of course, in the second mode, the terminal also performs the difference judgment, and the reason why the network side performs the judgment again instead of the direct judgment is to improve the accuracy of the judgment.

Further, after the network side determines, according to the A3 event measurement report of the terminal feedback, that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold, before triggering the multipoint coordinated transmission for the at least one neighboring cell The network side may further determine whether the spectrum efficiency α of the serving cell is lower than a set threshold, and determine that the multi-point coordinated transmission is allowed to be triggered when determining that the frequency efficiency α of the serving cell is lower than a set threshold. The spectrum efficiency α of the serving cell may be calculated according to a Channel Quality Indicator (CQI) reported by the terminal, and the size of the α may measure the quality of the channel, and when the channel quality is poor, the terminal is already in the cell. In the case of the edge, therefore, when the value of α is lower than the set threshold, multi-point coordinated transmission can be started for the terminal at the cell edge.

Step 220: The network side triggers multi-point coordinated transmission for the at least one neighboring cell.

In this way, the network side starts to perform information interaction with the at least one neighboring cell that meets the condition, and starts multi-point coordinated transmission to the terminal.

Based on the foregoing embodiment, in the process of performing the coordinated multi-point transmission, if the network side satisfies the formula 2 of the channel state of any neighboring cell according to the notification of the terminal, the multi-point coordinated transmission of the any neighboring cell ends, because if Equation 2, it indicates that the terminal is not in the cell edge or the cell overlap region of the any neighboring cell, and then continuing to use the coordinated communication based on the arbitrary neighboring cell can not obtain the expected effect (if other neighboring cells still satisfy the formula 2, Then, the network side continues to perform coordinated multi-point transmission based on other neighboring cells and serving cells, and only removes any neighboring cells that do not conform to Equation 2:

Mn+Ofn+Ocn-Hy<Ms+Ofs+Ocs+Off Equation 2

Based on the foregoing embodiment, referring to FIG. 3, in the embodiment of the present invention, a network side device (eg, a station) includes sending Unit 30, receiving unit 31 and processing unit 32, wherein

The sending unit 30 is configured to configure an A3 measurement event for the terminal, and instruct the terminal to perform a neighbor cell channel quality measurement;

The receiving unit 31 is configured to receive an A3 event measurement report fed back by the terminal;

The processing unit 32 is configured to trigger multi-point coordinated transmission for the at least one neighboring cell when determining that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold based on the A3 event measurement report.

When the A3 measurement event is configured for the terminal, the sending unit 30 is specifically configured to include:

The receiving unit 31 receives the A3 event measurement report that is sent by the terminal, and determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold based on the A3 event measurement report, the processing unit 32 is specifically configured to:

When receiving the A3 event measurement report sent by the terminal, the receiving unit 31 directly determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold; or

After receiving the A3 event measurement report sent by the terminal, the receiving unit 31 determines the channel state of each neighboring cell according to the channel quality measurement result of each neighboring cell recorded in the A3 event measurement report, and determines any neighboring cell. When the channel state satisfies the formula 1, determining that the difference between the channel quality of the any neighboring cell and the channel quality of the serving cell reaches a set threshold;

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

After the processing unit 32 determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold based on the A3 event measurement report fed back by the terminal, the processing unit 32 further uses the multi-point coordinated transmission for the at least one neighboring cell. to:

The processing unit 32 is further configured to:

According to the notification of the terminal, when the channel state of any neighboring cell satisfies the formula 2, the coordinated multi-point transmission of any neighboring cell is ended:

Mn+Ofn+Ocn-Hy<Ms+Ofs+Ocs+Off Equation 2

As shown in FIG. 4, in the embodiment of the present invention, a network side device (eg, a station) includes a sending port 40, a receiving port 41, and a processor 42, where

The sending port 40 is configured to configure an A3 measurement event for the terminal, and instruct the terminal to perform channel quality measurement of the neighboring cell.

a receiving port 41, configured to receive an A3 event measurement report fed back by the terminal;

The processor 42 is configured to determine, according to the A3 event measurement report, a channel quality of the at least one neighboring cell and a serving cell When the difference in channel quality reaches a set threshold, multi-point coordinated transmission is triggered for at least one neighboring cell.

When the A3 measurement event is configured for the terminal, the sending port 40 is specifically configured to include:

The processor 42 is specifically configured to: when the A3 event measurement report is received by the terminal, and the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold, based on the A3 event measurement report, the processor 42 is specifically configured to:

When receiving the A3 event measurement report sent by the terminal, the receiving port 41 directly determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold; or

After receiving the A3 event measurement report sent by the terminal, the receiving port 41 determines the channel state of each neighboring cell according to the channel quality measurement result of each neighboring cell recorded in the A3 event measurement report, and determines any neighboring cell. When the channel state satisfies the formula 1, determining that the difference between the channel quality of the any neighboring cell and the channel quality of the serving cell reaches a set threshold;

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

After the processor 42 determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold based on the A3 event measurement report fed back by the terminal, the processor 42 further uses the multi-point coordinated transmission for the at least one neighboring cell. to:

The processor 42 is further configured to:

Mn+Ofn+Ocn-Hy<Ms+Ofs+Ocs+Off Equation 2

Referring to FIG. 5, an embodiment of the present invention provides an apparatus for implementing coordinated multi-point transmission, including:

The processor 500 is configured to read a program in the memory 520 and perform the following process:

Configuring A3 measurement events for the terminal, and instructing the terminal to perform channel quality measurement of the neighboring cell through the transceiver 510;

Receiving, by the transceiver 510, an A3 event measurement report fed back by the terminal;

The transceiver 510 is configured to receive and transmit data under the control of the processor.

Preferably, the processor 500 is specifically configured to include:

An RRCConnectionReconfiguration message is sent to the terminal through the transceiver 510 to configure an A3 measurement event for the terminal.

Preferably, the A3 event measurement report fed back by the terminal is received, and at least one is determined based on the A3 event measurement report. When the difference between the channel quality of the neighboring cell and the channel quality of the serving cell reaches a set threshold, the processor 500 is specifically configured to:

When receiving the A3 event measurement report sent by the terminal, the transceiver 510 directly determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold; or

After receiving the A3 event measurement report sent by the terminal, the transceiver 510 determines the channel state of each neighboring cell according to the channel quality measurement result of each neighboring cell recorded in the A3 event measurement report, and determines any neighboring cell. When the channel state satisfies the formula 1, determining that the difference between the channel quality of the any neighboring cell and the channel quality of the serving cell reaches a set threshold;

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

Preferably, the processor 500 triggers multi-point coordinated transmission for the at least one neighboring cell after determining that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold based on the A3 event measurement report fed back by the terminal. Previously, further used to:

Preferably, the processor 500 is further configured to:

Mn+Ofn+Ocn-Hy<Ms+Ofs+Ocs+Off Equation 2

In summary, in the embodiment of the present invention, the network side uses the terminal reporting result obtained by the A3 event measurement as the decision basis for triggering the coordinated multi-point transmission, so that the network side can accurately perceive whether the terminal has reached the cell edge. And the overlapping areas of which cells, so that multi-point coordinated transmission can be triggered in an accurate time, thereby ensuring the data transmission quality of the terminal and effectively guaranteeing the service quality of the system; and the solution conforms to the existing agreement. There is no need to make too many modifications to the terminal side, which can save a lot of development and maintenance costs.

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, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

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 embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A method for implementing multi-point coordinated transmission, comprising:

The network side configures an A3 measurement event for the terminal, and instructs the terminal to perform channel quality measurement of the neighboring cell.

The network side receives the A3 event measurement report fed back by the terminal;

The network side triggers multi-point coordinated transmission for the at least one neighboring cell when determining that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold based on the A3 event measurement report.
The method of claim 1, wherein the network side configures an A3 measurement event for the terminal, including:

The network side sends a radio resource control connection configuration RRCConnectionReconfiguration message to the terminal to configure the A3 measurement event for the terminal.
The method according to claim 1, wherein the network side receives the A3 event measurement report fed back by the terminal, and determines, according to the A3 event measurement report, that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches Set thresholds, including:

When receiving the A3 event measurement report sent by the terminal, the network side directly determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold; or

After receiving the A3 event measurement report sent by the terminal, the network side determines the channel state of each neighboring cell according to the channel quality measurement result of each neighboring cell recorded in the A3 event measurement report, and determines the status of any neighboring cell. When the channel state satisfies the formula 1, determining that the difference between the channel quality of the any neighboring cell and the channel quality of the serving cell reaches a set threshold;

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

Where Mn is a channel quality measurement result that does not consider calculating a neighboring cell under any bias; Ofn is an offset corresponding to a specific frequency of a neighboring cell; Ocn is a cell-specific offset of a neighboring cell; Ms is a calculation for not considering any offset Channel quality measurement result of the serving cell; Ofs is the offset corresponding to the specific frequency of the serving cell; Ocs is the cell-specific offset of the serving cell; Hys is the lag parameter of the preset neighboring cell channel quality measurement event; The offset parameter of the channel quality measurement event of the neighboring cell.
The method according to claim 1, 2 or 3, wherein the network side determines, after the A3 event measurement report of the terminal feedback, that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold, Before triggering multi-point coordinated transmission for the at least one neighboring cell, the method includes:

Further determining whether the spectrum efficiency of the serving cell is lower than a set threshold, and determining that the multi-point coordinated transmission is allowed to be triggered when determining that the frequency efficiency of the serving cell is lower than a set threshold.
The method of claim 1, 2 or 3, further comprising:

The network side determines, according to the notification of the terminal, that the channel state of any neighboring cell satisfies the formula 2, and ends the coordinated multi-point transmission of the any neighboring cell:

Mn+Ofn+Ocn-Hy<Ms+Ofs+Ocs+Off Equation 2

Where Mn is a channel quality measurement result that does not consider calculating a neighboring cell under any bias; Ofn is an offset corresponding to a specific frequency of a neighboring cell; Ocn is a cell-specific offset of a neighboring cell; Ms is a calculation for not considering any offset Channel quality measurement result of the serving cell; Ofs is the offset corresponding to the specific frequency of the serving cell; Ocs is the cell-specific offset of the serving cell; Hys is the lag parameter of the preset neighboring cell channel quality measurement event; The offset parameter of the channel quality measurement event of the neighboring cell.
An apparatus for implementing multi-point coordinated transmission, comprising:

a sending unit, configured to configure an A3 measurement event for the terminal, and instruct the terminal to perform channel quality measurement of the neighboring cell;

a receiving unit, configured to receive an A3 event measurement report fed back by the terminal;

And a processing unit, configured to trigger multi-point coordinated transmission for the at least one neighboring cell when determining, according to the A3 event measurement report, that a difference between a channel quality of the at least one neighboring cell and a channel quality of the serving cell reaches a set threshold.
The device according to claim 6, wherein the sending unit is configured to: when configuring an A3 measurement event for the terminal:

The RRCConnectionReconfiguration message is configured to send a radio resource control connection to the terminal to configure an A3 measurement event for the terminal.
The apparatus according to claim 6, wherein the A3 event measurement report fed back by the terminal is received, and the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell is determined to be set based on the A3 event measurement report. When the threshold is used, the processing unit is specifically used for

When the receiving unit receives the A3 event measurement report sent by the terminal, directly determining that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold; or

After receiving the A3 event measurement report sent by the terminal, the receiving unit determines the channel state of each neighboring cell according to the channel quality measurement result of each neighboring cell recorded in the A3 event measurement report, and determines any neighbor. When the channel state of the cell satisfies the formula 1, determining that the difference between the channel quality of the any neighboring cell and the channel quality of the serving cell reaches a set threshold;

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off Formula One

Where Mn is a channel quality measurement result that does not consider calculating a neighboring cell under any bias; Ofn is an offset corresponding to a specific frequency of a neighboring cell; Ocn is a cell-specific offset of a neighboring cell; Ms is a calculation for not considering any offset Channel quality measurement result of the serving cell; Ofs is the offset corresponding to the specific frequency of the serving cell; Ocs is the cell-specific offset of the serving cell; Hys is the lag parameter of the preset neighboring cell channel quality measurement event; The offset parameter of the channel quality measurement event of the neighboring cell.
The device according to claim 6, 7 or 8, wherein the processing unit determines that the difference between the channel quality of the at least one neighboring cell and the channel quality of the serving cell reaches a set threshold based on the A3 event measurement report fed back by the terminal. After the value, before triggering the multi-point coordinated transmission for the at least one neighboring cell, the method is further used for:

Further determining whether the spectrum efficiency of the serving cell is lower than a set threshold, and determining that the multi-point coordinated transmission is allowed to be triggered when determining that the frequency efficiency of the serving cell is lower than a set threshold.
The apparatus according to claim 6, 7 or 8, wherein said processing unit is further configured to:

According to the notification of the terminal, when the channel state of any neighboring cell satisfies the formula 2, the multi-point coordinated transmission of the any neighboring cell ends:

Mn+Ofn+Ocn-Hy<Ms+Ofs+Ocs+Off Equation 2

Where Mn is a channel quality measurement result that does not consider calculating a neighboring cell under any bias; Ofn is an offset corresponding to a specific frequency of a neighboring cell; Ocn is a cell-specific offset of a neighboring cell; Ms is a calculation for not considering any offset Channel quality measurement result of the serving cell; Ofs is the offset corresponding to the specific frequency of the serving cell; Ocs is the cell-specific offset of the serving cell; Hys is the lag parameter of the preset neighboring cell channel quality measurement event; Offset parameters of channel quality measurement events of neighboring cells