WO2020243944A1

WO2020243944A1 - Network communication method and related device

Info

Publication number: WO2020243944A1
Application number: PCT/CN2019/090302
Authority: WO
Inventors: 李琦; 国欢
Original assignee: 华为技术有限公司
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-12-10

Abstract

Provided in the embodiments of the present invention are a network communication method and a related device. The method comprises: a first network device receiving first signaling from a user equipment (UE), wherein the first signaling is used for indicating that the UE supports a first mode, and the first mode comprises TM9 and TM10; the first network device determining, according to the first signaling, that the UE supports downlink coordinated multipoint DLCOMP; the first network device sending second signaling to a second network device, wherein the second signaling comprises the first mode supported by the UE, the second signaling is used for instructing the second network device to send a first channel state information reference signal (CSI-RS) to the UE; and the first network device sending a second CSI-RS to the UE. The first network device may determine that the UE supports DLCOMP according to the first mode supported by the UE, thereby ensuring that the UE does not interfere with normal data received by the UE after receiving a CSI-RS. In addition, the first network device instructs the second network device to send the CSI-RS to the UE, which can ensure that at least two network devices send the CSI-RS to the UE, thereby ensuring that DLCOMP takes effect.

Description

A network communication method and related equipment

Technical field

This application relates to the field of communications, in particular to a network communication method and related equipment.

Background technique

Long-time evolution (LTE) cell edge user experience has always been a topic that needs to be improved. Since the path loss of users at the cell edge is relatively large, and the user equipment at the cell edge is susceptible to interference from other cells except the serving cell, the downlink signal is weak. Therefore, when the user equipment is at the edge of the cell, user perceptions such as download rate and web page browsing rate will become worse.

Downlink coordinated multiple points (DLCOMP) can simultaneously send data to user equipment (UE) through multiple cells, thereby obtaining a combined gain on the UE, which can increase the downlink transmission rate of the cell-edge UE. The third generation partnership project (3rd generation partnership project, 3GPP) protocol defines the channel state information reference signal (channel state indication-reference signal, CSI-RS). When multiple cells transmit CSI-RS, the UE can measure the CSI-RS of multiple cells to obtain channel information from multiple cells to the UE, and then feed back the channel information of multiple cells to the serving cell of the UE to serve The cell negotiates with other cells whose CSI-RS is measured by the UE to determine a coordinated cell. After the coordinated cell is determined, the serving cell and the coordinated cell jointly send data to the UE, and the UE can obtain a combined gain.

However, some UEs cannot recognize the CSI-RS. After receiving the CSI-RS, these UEs will demodulate the CSI-RS as data, which will interfere with the data to be received, which will increase the probability of data reception failure. In addition, each cell needs to independently determine that the number of CSI-RS users in the cell that can be identified is greater than a preset threshold before transmitting CSI-RS. If only one of the serving cell and the coordinated cell transmits the CSI-RS, then DLCOMP will not take effect. In this way, the probability of DLCOMP taking effect is relatively low.

Summary of the invention

A first aspect of the embodiments of the present invention provides a method for network communication. The method includes: a first network device receives first signaling from a user equipment UE, the first signaling is used to indicate that the UE supports a first mode, and the first mode includes Transmission modes TM9 and TM10; the first network device determines that the UE supports downlink coordinated multipoint DLCOMP according to the first signaling; the first network device sends second signaling to the second network device, and the second signaling includes the first mode supported by the UE The second signaling is used to instruct the second network device to send the first channel state information reference signal CSI-RS to the UE; the first network device to send the second CSI-RS to the UE. The first network device may be a serving cell of the UE, and the second network device may be a coordinated cell of the UE. The first network device may determine that the UE supports DLCOMP according to the UE supporting the first mode, thereby ensuring that the UE will not interfere with the normal data received by the UE after receiving the CSI-RS. In addition, the first network device instructs the second network device to send CSI-RS to the UE, which can ensure that at least two network devices send CSI-RS to the UE, thereby ensuring that DLCOMP takes effect.

Optionally, with reference to the first aspect, in the first possible implementation manner of the first aspect, before the first network device sends the second signaling to the second network device, the method further includes: the first network device receives from the UE The third signaling; the third signaling is used by the first network device to determine that the UE is located at the edge of the cell.

Optionally, in combination with the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, before the first network device sends the second signaling to the second network device, the method further includes : The first network device determines that the moving rate of the UE is within the preset rate range.

Optionally, in combination with the second possible implementation manner of the first aspect, in the third possible implementation manner of the first aspect, before the first network device sends the second signaling to the second network device, the method further includes : The first network device determines that the load of the first network device is within the first preset load range and the load of the second network device is within the second preset load range.

Optionally, in combination with the third possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect, before the first network device sends the second signaling to the second network device, the method further includes : The first network device receives the fourth signaling from the UE; the first network device determines, according to the fourth signaling, that the modulation and coding strategy MCS of the UE is lower than the preset MCS value.

Optionally, in combination with any one of the first aspect to the fourth possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect, the first network device forwards to the second Before the network device sends the second signaling, the method further includes: the first network device determines that the first mode is TM10 according to the first signaling; the first network device sends the second signaling to the second network device, and the second signaling is used for Instruct the second network device to send the first CSI-RS to the UE, and the first CSI-RS is scrambled with the PCI of the second network device.

Optionally, in combination with any one of the first aspect to the fourth possible implementation manner of the first aspect, in the sixth possible implementation manner of the first aspect, the first network device forwards to the second Before the network device sends the second signaling, the method further includes: the first network device determines that the first mode is TM9 according to the first signaling; the first network device sends the second signaling to the second network device, and the second signaling is used for Instruct the second network device to send the first CSI-RS to the UE, where the first CSI-RS is scrambled with the PCI of the first network device.

A second aspect of the embodiments of the present invention provides a network communication method, the method includes: a second network device receives second signaling from a first network device, the second signaling includes a first mode supported by a user equipment UE; 2. The network device determines the first channel state information reference signal CSI-RS according to the second signaling; the second network device sends the first CSI-RS to the UE according to the second signaling. In this way, it can be ensured that at least two network devices send CSI-RS to the UE, thereby ensuring that DLCOMP takes effect.

Optionally, with reference to the second aspect, in the first possible implementation manner of the second aspect, the second network device determining the first channel state information reference signal CSI-RS according to the second signaling includes: when the second network device When it is determined that the first mode is TM10 according to the second signaling, the second network device determines that the first CSI-RS is scrambled with the PCI of the second network device.

Optionally, with reference to the second aspect, in a second possible implementation manner of the second aspect, the second network device determining the first channel state information reference signal CSI-RS according to the second signaling includes: when the second network device When it is determined that the first mode is TM9 according to the second signaling, the second network device determines that the first CSI-RS is scrambled with the PCI of the first network device.

A third aspect of the embodiments of the present invention provides a first network device for network communication, wherein the first network device includes: a receiving unit configured to receive first signaling from a user equipment UE, and the first signaling is used for Instruct the UE to support the first mode, the first mode includes transmission modes TM9 and TM10; the determining unit is used to determine that the UE supports downlink coordinated multipoint DLCOMP according to the first signaling; the sending unit is used to send the second signal to the second network device Let the second signaling include the first mode supported by the UE, the second signaling is used to instruct the second network device to send the first channel state information reference signal CSI-RS to the UE; the sending unit is also used to send the second CSI-RS.

Optionally, with reference to the third aspect, in a first possible implementation manner of the third aspect, the first network device includes: a receiving unit, which is further configured to receive third signaling from the UE; and a determining unit, which is also configured to The third signaling determines that the UE is located at the edge of the cell.

Optionally, in combination with the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect, the first network device includes: a determining unit, which is further configured to determine that the UE's mobile rate Set within the speed range.

Optionally, in combination with the second possible implementation manner of the third aspect, in the three possible implementation manners of the third aspect, the first network device includes: a determining unit configured to determine that the load of the first network device is in the first Within a preset load range and the load of the second network device is within a second preset load range.

Optionally, in combination with the third possible implementation manner of the third aspect, in the fourth possible implementation manner of the third aspect, the first network device includes: a receiving unit configured to receive fourth signaling from the UE; The receiving unit is configured to determine, according to the fourth signaling, that the modulation and coding strategy MCS of the UE is lower than the preset MCS value.

Optionally, in combination with the third aspect to the fourth possible implementation manner of the third aspect, in the fifth possible implementation manner of the third aspect, the first network device includes: a determining unit, which is further configured to The signaling determines that the first mode is TM10; the sending unit is also used to send second signaling to the second network device. The second signaling is used to instruct the second network device to send the first CSI-RS to the UE. RS is scrambled with the PCI of the second network device.

Optionally, in combination with the third aspect to the fourth possible implementation manner of the third aspect, in the sixth possible implementation manner of the third aspect, the first network device includes: a determining unit, which is further configured to: Let the first mode be TM9; the sending unit is also used to send second signaling to the second network device, the second signaling is used to instruct the second network device to send the first CSI-RS to the UE, the first CSI-RS It is scrambled by the PCI of the first network device.

A fourth aspect of the embodiments of the present invention provides a second network device for network communication. The second network device includes: a receiving unit, configured to receive second signaling from the first network device, and the second signaling includes user equipment UE support The determining unit is used to determine the first channel state information reference signal CSI-RS according to the second signaling; the sending unit is used to send the first CSI-RS to the UE according to the second signaling.

Optionally, with reference to the fourth aspect, in the first possible implementation manner of the fourth aspect, the second network device includes: a determining unit configured to determine whether the first CSI-RS is TM10 when the first mode is TM10 The PCI of the second network device is scrambled.

Optionally, with reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the second network device includes: a determining unit, configured to determine whether the first CSI-RS is TM9 when the first mode is TM9 The PCI of the first network device is scrambled.

The embodiment of the present invention provides a network communication method and related equipment. The method includes: a first network device receives first signaling from a user equipment UE, and the first signaling is used to indicate that the UE supports a first mode. Including TM9 and TM10; the first network device determines that the UE supports downlink coordinated multipoint DLCOMP according to the first signaling; the first network device sends second signaling to the second network device, and the second signaling includes the first mode supported by the UE, The second signaling is used to instruct the second network device to send the first channel state information reference signal CSI-RS to the UE; the first network device to send the second CSI-RS to the UE. The first network device may determine that the UE supports DLCOMP according to the UE supporting the first mode, thereby ensuring that the UE will not interfere with the normal data received by the UE after receiving the CSI-RS. In addition, the first network device instructs the second network device to send CSI-RS to the UE, which can ensure that at least two network devices send CSI-RS to the UE, thereby ensuring that DLCOMP takes effect.

Description of the drawings

Figure 1 is a schematic diagram of a network topology provided by an embodiment of the present invention;

2 is a schematic diagram of an embodiment of a network communication method provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of another embodiment of a network communication method according to an embodiment of the present invention;

4 is a schematic diagram of an embodiment of a first network device for network communication according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an embodiment of a second network device for network communication according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention.

The term "and/or" in this application can be an association relationship describing associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, and both A and B exist , There are three cases of B alone. In addition, the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.

The terms "first", "second", etc. in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than the content illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or modules is not necessarily limited to the clearly listed Those steps or modules may include other steps or modules that are not clearly listed or are inherent to these processes, methods, products, or equipment.

Because the user equipment at the cell edge is relatively large, the user equipment at the cell edge is susceptible to interference from other cells other than the serving cell, and the downlink signal is weak. As shown in FIG. 1, when the user equipment 103 is located at the edge of the first network equipment 101 and the second network equipment 102, the downlink signal of the user equipment 103 is relatively weak. If the first network device 101 is the serving cell of the user equipment 103, the user equipment 103 will also be interfered by the second network device 102. Therefore, when the user equipment is at the edge of the cell, user perceptions such as download rate and web page browsing rate will become worse. DLCOMP can simultaneously send data to user equipment through multiple cells, thereby obtaining a combined gain on the user equipment, and can improve the downlink transmission rate of the cell edge user equipment.

However, some user equipments cannot recognize CSI-RS. For a user equipment that cannot recognize CSI-RS, the user equipment will think that the information on the resource unit occupied by the CSI-RS is data, and demodulate the information on the resource unit, which will introduce erroneous information. Interference to the data to be received.

Each cell independently judges that the number of users capable of identifying CSI-RS in the cell is greater than the preset threshold, so that the cell will transmit CSI-RS. If only one of the serving cell and the coordinated cell transmits the CSI-RS, then DLCOMP will not take effect. In this way, the probability of DLCOMP taking effect is relatively low.

Therefore, Embodiment 1 of the present invention provides a network communication method. As shown in FIG. 2, the method includes:

201. A first network device receives first signaling from a user equipment.

The first network device receives first signaling from the UE. The first signaling is used to indicate that the UE supports a first mode. The first mode may include transmission mode (TM) 9 and TM10. The first network device may determine that the UE supports DLCOMP according to the UE supporting the first mode. The first network device may be a serving cell of the UE, and the second network device may be a coordinated cell of the UE.

202. The first network device determines, according to the first signaling, that the user equipment supports downlink coordinated multipoint DLCOMP.

The first network device determines that the UE supports DLCOMP according to the first signaling received from the user equipment UE in step 201.

203. The first network device sends the second CSI-RS to the user equipment.

The first network device sends a second CSI-RS to the UE, where the second CSI-RS is scrambled with the physical cell identity (PCI) of the first network device.

Optionally, before the first network device sends the second CSI-RS to the UE, the first network device may also determine that the number of user equipment supporting DLCOMP in the cell where the first network device is located exceeds a first preset number. The number of user equipments that can identify the CSI-RS in the cell exceeds the second preset number.

It should be noted that if the following conditions: the UE does not support DLCOMP, the number of user equipment supporting DLCOMP in the cell where the first network device is located does not exceed the first preset number, and the number of user equipment that can identify CSI-RS in the cell does not exceed the second preset Assuming that at least one condition in the number is satisfied, the first network device stops sending the second CSI-RS to the UE after a preset delay time, and instructs the second network device to stop sending the first CSI-RS to the UE. The first network device stops sending the second CSI-RS to the UE after a preset delay time, and triggers the second network device to stop sending the first CSI-RS to the UE, which can simplify the configuration process. Within the range, there is a need to send CSI-RS, so there is no need to reconfigure. If it is determined that after at least one of the above three conditions is satisfied, the first network device immediately stops sending the second CSI-RS to the UE, and instructs the second network device to stop sending the first CSI-RS to the UE, which may lead to the After a network device stops sending the second CSI-RS, it needs to reconfigure and send the CSI-RS.

204. The first network device sends second signaling to the second network device.

The first network device sends second signaling to the second network device. The second signaling is used to instruct the second network device to send the first CSI-RS to the UE. The second signaling includes the first mode supported by the UE. One mode includes TM9 and TM10.

Optionally, if the first mode is TM9, the first network device may also carry the PCI of the first network device in the second signaling, and the second network device may determine the first network device according to the PCI of the first network device. One CSI-RS.

It should be noted that there is no time sequence relationship between step 203 and step 204. The first network device may first send the second CSI-RS to the UE and then send the second signaling to the second network device, or may first send the second signaling to the second network device and then send the second CSI-RS to the UE .

205. The second network device determines the first CSI-RS according to the second signaling.

The second network device determines the first CSI-RS according to the first signaling. The first signaling may indicate the first mode supported by the UE. If the first mode is TM9, the second network device determines that the first CSI-RS is scrambled with the PCI of the first network device. In this case, the DLCOMP may be joint transmission (JT) between cells.

If the first mode is TM10, the second network device determines that the first CSI-RS is scrambled with the PCI of the second network device. In this case, the DLCOMP may be JT or dynamic cell selection (dynamic point selection, DPS).

206. The second network device sends the first CSI-RS to the user equipment.

The second network device sends the first CSI-RS determined in step 205 to the UE. The UE may obtain the combined gain according to the first CSI-RS and the first CSI-RS sent by the first network device in step 203.

It is understandable that the second network device serves as a coordinated cell using the first network device as a serving cell. The second network device may simultaneously serve as a coordinated cell of multiple serving cells.

Optionally, when the second network device serves as a coordinated cell of multiple serving cells, the second network device determines that the first mode is TM9, and the second network device receives the first network device's stop to send the first mode to the UE. After the CSI-RS is instructed, the second network device stops sending the first CSI-RS to the UE. At this time, the first CSI-RS is scrambled with the PCI of the first network device.

If the second network device is used as a coordinated cell of multiple serving cells, the second network device determines that the first mode is TM10, then the second network device receives the first network device's stop sending the first CSI-RS to the UE After the instruction of, the second network device continues to send the first CSI-RS in order to meet the needs of other serving cells. At this time, the first CSI-RS is scrambled with the PCI of the second network device.

The first embodiment of the present invention provides a network communication method and related equipment. The method includes: a first network device receives first signaling from a user equipment UE, the first signaling is used to indicate that the UE supports the first mode, and the first The modes include TM9 and TM10; the first network device determines that the UE supports downlink coordinated multipoint DLCOMP according to the first signaling; the first network device sends second signaling to the second network device, and the second signaling includes the first mode supported by the UE The second signaling is used to instruct the second network device to send the first channel state information reference signal CSI-RS to the UE; the first network device to send the second CSI-RS to the UE. The first network device may determine that the UE supports DLCOMP according to the UE supporting the first mode, thereby ensuring that the UE will not interfere with the normal data received by the UE after receiving the CSI-RS. In addition, the first network device instructs the second network device to send CSI-RS to the UE, which can ensure that at least two network devices send CSI-RS to the UE, thereby ensuring that DLCOMP takes effect.

In the first embodiment, before the first network device sends the second CSI-RS to the UE, the first network device may also determine that the UE is located at the edge of the cell where the first network device is located, and determine that the UE's mobile rate is in advance. Set within the moving range, determine that the UE’s modulation and coding scheme (MCS) is lower than the preset MCS value, determine that the load of the first network device itself is within the first preset load range and the second network The load of the device is within the second preset load range. The second embodiment provides a network communication method. As shown in FIG. 3, the method includes:

301. A first network device receives first signaling from a user equipment.

For step 301, please refer to step 201 in the first embodiment for understanding, and will not be repeated here.

302. The first network device determines, according to the first signaling, that the user equipment supports downlink coordinated multipoint DLCOMP.

For step 302, please refer to step 202 in the first embodiment for understanding, and will not be repeated here.

303. The first network device receives the third signaling from the user equipment.

The first network device receives the third signaling from the UE, and the first network device can determine whether the UE is located at the edge of the cell where the first network device is located according to the third signaling. Exemplarily, the third signaling may be an A3 measurement report of the UE or an uplink sounding reference signal (sounding reference signal, SRS). If the second network device receives the SRS measurement result, the second network device sends the SRS measurement result to the first network device to determine whether the UE is located at the edge of the cell where the first network device is located.

304. The first network device determines that the user equipment is located at the edge of the cell according to the third signaling.

The first network device determines that the UE is located at the edge of the cell according to the third signaling. The third signaling may be the A3 measurement report or the SRS measurement result as described in step 303.

305. The first network device determines that the movement rate of the user equipment is within a preset rate range.

The first network device may determine that the moving rate of the UE is within the preset rate range. The first network device can measure the movement rate of the UE according to the Doppler effect. When the moving rate is higher than the preset range, the efficiency of the UE to receive data may be affected. Therefore, only when the first network device determines that the moving rate of the UE is within the preset rate range, the first network device and the second network device will send the CSI-RS to the UE.

306. The first network device determines that the load of the first network device is within a first preset range and the load of the second network device is within a second preset load range.

The first network device determines that the load of the first network device is within a first preset range. If the load of the first network device is not within the first preset load range or the load of the second network device is not within the second preset load range, neither the first network device nor the second network device can send to the UE The second CSI-RS. When the load of the second network device is within the second preset load range, the second network device can notify the first network device through signaling, so that the first network device determines that the load of the second network device is within the second preset load range. Set within the load range.

307. The first network device receives the fourth signaling from the user equipment.

The first network device receives the fourth signaling from the UE, and the fourth signaling may be channel state information (CSI) of multiple cells collected by the UE. The first network device may determine the MCS, channel rank (rank indication, RI), and precoding matrix indication (precoding matrix indication, PMI) of the UE according to the channel information.

308. The first network device determines, according to the fourth signaling, that the MCS of the user equipment is lower than the preset MCS value.

In step 307, the first network device determines the MCS of the UE, and the first network device determines that the MCS of the UE is lower than the preset MCS value.

309. The first network device sends the second CSI-RS to the user equipment.

Please refer to step 203 in the first embodiment for understanding of step 309, which will not be repeated here.

310. The first network device sends second signaling to the second network device.

Please refer to step 204 in the first embodiment for understanding of step 310, which will not be repeated here.

There is no time sequence between step 309 and step 310. The first network device may first send the second CSI-RS to the UE and then send the second signaling to the second network device, or may first send the second signaling to the second network device and then send the second CSI-RS to the UE .

311. The second network device determines the first CSI-RS according to the second signaling.

Please refer to step 205 in the first embodiment for understanding of step 311, which will not be repeated here.

312. The second network device sends the first CSI-RS to the user equipment.

Please refer to step 206 in the first embodiment for understanding of step 312, which will not be repeated here.

Before the first network device sends the second CSI-RS to the UE, the first network device may determine that the UE is located at the edge of the cell where the first network device is located, determine that the UE's moving rate is within a preset moving range, and determine The MCS of the UE is lower than the preset MCS value, and it is determined that the load of the first network device is within the first preset load range and the load of the second network device is within the second preset load range. However, in actual production, it is not limited to satisfy all of the above conditions, and only some of the above conditions can be satisfied. For example, before the first network device sends the second CSI-RS to the UE, the first network device only needs to determine that the UE is located at the edge of the cell where the first network device is located. This should not be understood as a limitation to the present invention.

The third embodiment provides a first network device 40 for performing the steps performed by the first network device in the first and second embodiments. As shown in FIG. 4, the first network device 40 includes:

The receiving unit 401 is configured to receive first signaling from a user equipment UE, the first signaling is used to indicate that the UE supports the first mode, and the first mode includes transmission modes TM9 and TM10. Please refer to step 201 in the first embodiment and step 301 in the second embodiment for understanding, and will not be repeated here.

The receiving unit 401 is also used to receive the third signaling from the UE. Please refer to step 303 in the second embodiment for understanding, which will not be repeated here.

The receiving unit 401 is also used to receive the fourth signaling from the UE. Please refer to step 307 in the second embodiment for understanding, which will not be repeated here.

The determining unit 402 is configured to determine, according to the first signaling, that the UE supports downlink coordinated multipoint DLCOMP. Please refer to step 202 in the first embodiment and step 302 in the second embodiment for understanding, and will not be repeated here.

The determining unit 402 is further configured to determine that the UE is located at the edge of the cell according to the third signaling. Please refer to step 304 in the second embodiment for understanding, which will not be repeated here.

The determining unit 402 is also used to determine that the moving rate of the UE is within a preset rate range. Please refer to step 305 in the second embodiment for understanding, which will not be repeated here.

The determining unit 402 is further configured to determine that the load of the first network device is within a first preset load range and the load of the second network device is within a second preset load range. Please refer to step 306 in the second embodiment for understanding, which will not be repeated here.

The determining unit 402 is further configured to determine, according to the fourth signaling, that the modulation and coding strategy MCS of the UE is lower than the preset MCS value. Please refer to step 308 in the second embodiment for understanding, which will not be repeated here.

The determining unit 402 is further configured to determine whether the first mode is TM10 or the first mode is TM10 according to the first signaling. Please refer to step 205 in the first embodiment and step 311 in the second embodiment for understanding, and will not be repeated here.

The sending unit 403 is configured to send second signaling to the second network device, the second signaling includes the first mode supported by the UE, and the second signaling is used to instruct the second network device to send the first channel state information reference signal to the UE CSI-RS. Please refer to step 204 in the first embodiment and step 310 in the second embodiment for understanding, and will not be repeated here.

The sending unit 403 is also used to send the second CSI-RS to the UE. Please refer to step 206 in the first embodiment and step 312 in the second embodiment for understanding, and will not be repeated here.

The sending unit 403 is further configured to send second signaling to the second network device when the determining unit 402 determines that the first mode is TM10, and the second signaling is used to instruct the second network device to send the first CSI-RS to the UE, The first CSI-RS is scrambled with the physical cell identity PCI of the second network device. Please refer to step 204 in the first embodiment and step 310 in the second embodiment for understanding, and will not be repeated here.

The sending unit 403 is further configured to send second signaling to the second network device when the determining unit 402 determines that the first mode is TM9, and the second signaling is used to instruct the second network device to send the first CSI-RS to the UE , The first CSI-RS is scrambled with the PCI of the first network device. Please refer to step 204 in the first embodiment and step 310 in the second embodiment for understanding, and will not be repeated here.

The fourth embodiment provides a second network device 50 for performing the steps performed by the second network device in the first and second embodiments. As shown in FIG. 5, the first network device 50 includes:

The receiving unit 501 is configured to receive second signaling from a first network device, where the second signaling includes the first mode supported by the user equipment UE;

The determining unit 502 is configured to determine the first channel state information reference signal CSI-RS according to the second signaling;

The determining unit 502 is further configured to determine that the first CSI-RS is scrambled with the physical cell identity PCI of the second network device when the first mode is TM10.

The determining unit 502 is further configured to determine that the first CSI-RS is scrambled by the PCI of the first network device when the first mode is TM9.

The sending unit 503 is configured to send the first CSI-RS to the UE according to the second signaling.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions recorded in the embodiments are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A method of network communication, characterized in that the method includes:

The first network device receives first signaling from a user equipment UE, where the first signaling is used to indicate that the UE supports a first mode, and the first mode includes transmission modes TM9 and TM10;

The first network device determines, according to the first signaling, that the UE supports downlink coordinated multipoint DLCOMP;

The first network device sends second signaling to the second network device, the second signaling includes the first mode supported by the UE, and the second signaling is used to instruct the second network device to send the The UE sends the first channel state information reference signal CSI-RS;

The first network device sends a second CSI-RS to the UE.
The method for network communication according to claim 1, wherein before the first network device sends the second signaling to the second network device, the method further comprises:

Receiving, by the first network device, third signaling from the UE;

The first network device determines that the UE is located at the edge of a cell according to the third signaling.
The method for network communication according to claim 2, wherein before the first network device sends the second signaling to the second network device, the method further comprises:

The first network device determines that the moving rate of the UE is within a preset rate range.
The method for network communication according to claim 3, wherein before the first network device sends the second signaling to the second network device, the method further comprises:

The first network device determines that the load of the first network device is within a first preset load range and the load of the second network device is within a second preset load range.
The method for network communication according to claim 4, wherein before the first network device sends the second signaling to the second network device, the method further comprises:

Receiving, by the first network device, fourth signaling from the UE;

The first network device determines, according to the fourth signaling, that the modulation and coding strategy MCS of the UE is lower than a preset MCS value.
The method according to any one of claims 1 to 5, wherein before the first network device sends the second signaling to the second network device, the method further comprises:

Determining, by the first network device, that the first mode is TM10 according to the first signaling;

The first network device sends the second signaling to the second network device, where the second signaling is used to instruct the second network device to send the first CSI-RS to the UE, so The first CSI-RS is scrambled using the physical cell identity PCI of the second network device.
The method according to any one of claims 1 to 5, wherein before the first network device sends the second signaling to the second network device, the method further comprises:

Determining, by the first network device, that the first mode is TM9 according to the first signaling;

The first network device sends the second signaling to the second network device, where the second signaling is used to instruct the second network device to send the first CSI-RS to the UE, so The first CSI-RS is scrambled by the PCI of the first network device.
A method of network communication, characterized in that the method includes:

The second network device receives second signaling from the first network device, where the second signaling includes the first mode supported by the user equipment UE;

Determining, by the second network device, a first channel state information reference signal CSI-RS according to the second signaling;

The second network device sends the first CSI-RS to the UE.
The method according to claim 8, wherein the second network device determining the first channel state information reference signal CSI-RS according to the second signaling comprises:

When the second network device determines that the first mode is TM10 according to the second signaling, the second network device determines that the first CSI-RS is performed with the physical cell identity PCI of the second network device Scrambled.
The method according to claim 8, wherein the second network device determining the first channel state information reference signal CSI-RS according to the second signaling comprises:

When the second network device determines that the first mode is TM9 according to the second signaling, the second network device determines that the first CSI-RS is scrambled by the PCI of the first network device .
A first network device for network communication, wherein the first network device includes:

A receiving unit, configured to receive first signaling from a user equipment UE, where the first signaling is used to indicate that the UE supports a first mode, and the first mode includes transmission modes TM9 and TM10;

A determining unit, configured to determine, according to the first signaling, that the UE supports downlink coordinated multipoint DLCOMP;

The sending unit is configured to send second signaling to a second network device, where the second signaling includes the first mode supported by the UE, and the second signaling is used to instruct the second network device to send The UE sends the first channel state information reference signal CSI-RS;

The sending unit is further configured to send a second CSI-RS to the UE.
The first network device according to claim 11, wherein the first network device comprises:

The receiving unit is further configured to receive third signaling from the UE;

The determining unit is further configured to determine that the UE is located at the edge of a cell according to the third signaling.
The first network device according to claim 12, wherein the first network device comprises:

The determining unit is further configured to determine that the moving rate of the UE is within a preset rate range.
The first network device according to claim 13, wherein the first network device comprises:

The determining unit is configured to determine that the load of the first network device is within a first preset load range and the load of the second network device is within a second preset load range.
The first network device according to claim 14, wherein the first network device comprises:

The receiving unit is configured to receive fourth signaling from the UE;

The determining unit is configured to determine, according to the fourth signaling, that the modulation and coding strategy MCS of the UE is lower than a preset MCS value.
The first network device according to any one of claims 11 to 15, wherein the first network device comprises:

The determining unit is further configured to determine that the first mode is TM10 according to the first signaling;

The sending unit is further configured to send second signaling to the second network device when the determining unit determines that the first mode is TM10, where the second signaling is used to instruct the second network device to send The UE sends a first CSI-RS, and the first CSI-RS is scrambled with the physical cell identity PCI of the second network device.
The first network device according to any one of claims 11 to 15, wherein the first network device comprises:

The determining unit is further configured to determine that the first mode is TM9 according to the first signaling;

The sending unit is further configured to send second signaling to the second network device when the determining unit determines that the first mode is TM9, where the second signaling is used to instruct the second network device to send The UE sends a first CSI-RS, and the first CSI-RS is scrambled with the PCI of the first network device.
A second network device for network communication, wherein the second network device includes:

A receiving unit, configured to receive second signaling from the first network device, where the second signaling includes the first mode supported by the user equipment UE;

A determining unit, configured to determine a first channel state information reference signal CSI-RS according to the second signaling;

The sending unit is configured to send the first CSI-RS to the UE according to the second signaling.
The second network device according to claim 18, wherein the second network device comprises:

The determining unit is configured to determine that the first CSI-RS is scrambled with the physical cell identity PCI of the second network device when the first mode is TM10.
The second network device according to claim 18, wherein the second network device comprises:

The determining unit is configured to determine that the first CSI-RS is scrambled by the PCI of the first network device when the first mode is TM9.