CN107295686B

CN107295686B - Interference processing method, related equipment and interference processing system

Info

Publication number: CN107295686B
Application number: CN201610223547.7A
Authority: CN
Inventors: 冯三军; 徐凯; 李晓翠
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-04-11
Filing date: 2016-04-11
Publication date: 2021-04-09
Anticipated expiration: 2036-04-11
Also published as: WO2017177857A1; CN107295686A

Abstract

The invention provides an interference processing method, related equipment and an interference processing system, wherein the method comprises the steps that a base station sends a cell radio network temporary identity C-RNTI of a second terminal to a first terminal, the relation between the first terminal and the second terminal is a pairing relation, the C-RNTI of the second terminal is used for determining whether the first terminal and the second terminal use the same time frequency resources in the current cell, enabling the first terminal to acquire the first DCI of the second terminal according to the C-RNTI of the second terminal, the first DCI carries the scheduling information of the second terminal, and the first terminal can eliminate the signal of the second terminal according to the scheduling information contained in the first DCI, so that the interference of the signal of the second terminal to the first terminal is effectively avoided.

Description

Interference processing method, related equipment and interference processing system

Technical Field

The present invention relates to the field of communications, and in particular, to an interference processing method, a related device, and an interference processing system.

Background

In a Non-orthogonal Multiple Access (NOMA) mode, data of two or more different terminals in the same cell are superimposed on the same antenna port by using the same time and frequency resources and using different power configurations. More specifically, low path loss (cell center) terminals are assigned lower power, and high path loss (cell edge) terminals are assigned higher power.

The low-path-loss terminal is used for interference elimination, the base station sends auxiliary information of the high-path-loss terminal to the low-path-loss terminal through a Radio Resource Control (RRC) signaling, wherein the auxiliary information of the high-path-loss terminal is information required for interference elimination of the low-path-loss terminal, the low-path-loss terminal can acquire a signal of the high-path-loss terminal according to the auxiliary information, the low-path-loss terminal can eliminate the signal of the high-path-loss terminal, and therefore the low-path-loss terminal can effectively eliminate the interference of the high-path-loss terminal under the support of the auxiliary information to obtain demodulation performance, and the low-path-loss terminal can have a higher signal-to-noise ratio due to higher distributed power.

The base station transmits the auxiliary information of the high-path-loss terminal through RRC signaling, so that the updating speed of the auxiliary information of the high-path-loss terminal is relatively slow, which means that the updating frequency of the auxiliary information of the high-path-loss terminal is greatly limited. For some static and semi-static parameters in the auxiliary information of the high-path-loss terminal, but for some dynamic parameters in the auxiliary information of the high-path-loss terminal, such as the issuance of a Modulation and Coding Scheme (MCS), the RRC signaling obviously cannot meet the requirement of flexibility, and there is no feasible blind detection Scheme to make up for. Even if the high-path-loss terminal and the low-path-loss terminal which are already paired have the requirement of adjusting subframe levels to determine whether to perform multi-user scheduling, and the RRC signaling is difficult to meet the requirement, for example, on different subframes, some high-path-loss terminals and low-path-loss terminals perform co-scheduling, some low-path-loss terminals perform scheduling, and tens of subframes or even hundreds of subframes are required for the base station to issue the RRC signaling, so that the low-path-loss terminals cannot accurately determine the scheduling condition of each subframe of the high-path-loss terminals, and further, the low-path-loss terminals cannot perform interference elimination on the high-path-loss terminals at the subframe level.

Disclosure of Invention

The embodiment of the invention provides an interference processing method, related equipment and an interference processing system.

A first aspect of an embodiment of the present invention provides an interference processing method, where the method is applied to an interference processing system;

the interference processing system shown in this embodiment includes a base station, a second terminal, and a first terminal.

In this embodiment, the second terminal and the first terminal are paired terminals.

In the current cell, the second terminal and the first terminal may use the same time-frequency resources to superpose using different power configurations on the same antenna port.

The first terminal is located in the center of the current cell, and is allocated with lower power by the base station, that is, the first terminal is a low-path-loss terminal.

The second terminal is located at the edge of the current cell, and higher power is allocated by the base station, that is, the second terminal is a high-path-loss terminal.

The interference processing method comprises the following steps:

and the base station sends the cell radio network temporary identifier C-RNTI of the second terminal to the first terminal.

The C-RNTI of the second terminal is used for the first terminal to obtain first DCI of the second terminal according to the C-RNTI of the second terminal under the condition that the first terminal and the second terminal use the same time frequency resources in the current cell, wherein the first DCI carries scheduling information of the second terminal, and the first DCI is used for enabling the first terminal to eliminate signals of the second terminal.

With the interference processing method shown in this embodiment, for the first terminal, the first DCI including the scheduling information of the second terminal obtained by the first terminal only needs to obtain the C-RNTI of the second terminal, and the signaling required by the base station to indicate the C-RNTI of the second terminal to the first terminal is small, so that more resources are not occupied, the time length for obtaining the first DCI by the first terminal is reduced, the overhead of transmitting the control signaling by the physical layer is reduced, and the efficiency of eliminating interference is improved.

The first terminal can perform interference cancellation according to the first DCI of the second terminal, and because the first DCI contains complete scheduling information of the second terminal, the first terminal can accurately determine whether a signal of the second terminal causes interference to the first terminal, so that the accuracy of interference cancellation performed by the first terminal is improved, and the possibility that the first terminal cannot cancel the signal which causes interference to the first terminal is avoided.

Optionally, the base station may indicate, through indication information, whether the first terminal and the second terminal in the current cell use the same time-frequency resource, and the first terminal may obtain the first DCI of the second terminal for interference cancellation only when it is determined that the first terminal and the second terminal in the current cell use the same time-frequency resource, which is obviously not necessary for the first terminal to detect the first DCI of the second terminal that cannot cause interference to the first terminal, so that efficiency of the first terminal in interference cancellation is improved, and waste of resources of the first terminal is avoided.

In the interference processing method shown in this embodiment, the base station may carry the first indication information or the second indication information in the second DCI configured for the first terminal, the first terminal can determine whether the signal of the second terminal can cause interference to the first terminal according to the first indication information and the second indication information, the base station can perform subframe-level adjustment on the first terminal through the indication information in the second DCI, the first terminal determines whether there is a second terminal capable of causing interference at a subframe level, for example, the first terminal can determine a subframe in which only the first terminal is scheduled according to the first DCI and the second DCI, and/or only the second terminal obtains the scheduled subframe, and/or the first terminal and the second terminal together obtain the scheduled subframe. The first terminal can eliminate the signal of the second terminal at the sub-frame level, so that the accuracy and flexibility in the interference elimination process are improved, and the possibility that the signal of the second terminal interferes with the first terminal at the sub-frame level is avoided.

Optionally, the base station may also directly send the C-RNTI of the second terminal to the first terminal without determining whether the first terminal and the second terminal use the same time-frequency resource in the current cell, so as to reduce the time length of the base station processing in the interference cancellation process and reduce the resource consumption of the base station.

With reference to the first aspect of the embodiments, in a first implementation manner of the first aspect of the embodiments of the present invention,

determining, by the base station, whether the first terminal and the second terminal use the same time-frequency resource in a current cell;

and if the base station determines that the first terminal and the second terminal use the same time frequency resource in the current cell, the base station configures second Downlink Control Information (DCI) carrying first indication information.

The first indication information is used for indicating that the first terminal and the second terminal use the same time frequency resource in the current cell;

and the base station sends the second DCI to the first terminal so that the first terminal determines that the first terminal and the second terminal use the same time-frequency resource in the current cell according to the first indication information.

Wherein, the second DCI in this embodiment includes the original DCI information of the first terminal.

Wherein, DCI (English full name: Downlink Control Information, Chinese full name: Downlink Control Information).

In this embodiment, the second DCI configured by the base station for the first terminal is carried by a PDCCH (Physical Downlink Control Channel, which is called as a Physical Downlink Control Channel in all english).

For the first terminal, a physical layer of the first terminal acquires the second DCI belonging to the first terminal through blind detection.

The original DCI information configured by the base station for the first terminal may include downlink control information, uplink and downlink resource allocation, HARQ (Hybrid Automatic Repeat reQuest, chinese full name: Hybrid Automatic Repeat reQuest) information, scheduling information such as power control, and the like configured by the base station for the first terminal.

With reference to the first implementation manner of the first aspect of the embodiments of the present invention, in a second implementation manner of the first aspect of the embodiments of the present invention,

the first indication information is new bit information added to the second DCI, or the first indication information is existing bit information in the second DCI.

With reference to the method described in any one of the first aspect of the embodiments of the present invention to the second implementation manner of the first aspect of the embodiments of the present invention, in a third implementation manner of the first aspect of the embodiments of the present invention,

the base station sends the cell radio network temporary identifier C-RNTI of the second terminal to the first terminal, and the method comprises the following steps:

and the base station sends the C-RNTI of the second terminal to the first terminal through a Radio Resource Control (RRC) signaling.

Optionally, the base station shown in this embodiment may not determine whether the first terminal and the second terminal use the same time-frequency resource in the current cell, and the base station may directly send the C-RNTI of the second terminal to the first terminal, and the first terminal may obtain the scheduling information of the second terminal according to the C-RNTI of the second terminal.

The first terminal may determine whether the first terminal and the second terminal use the same time-frequency resource in the current cell according to the scheduling information of the second terminal.

With reference to the first implementation manner of the first aspect of the embodiment of the present invention or the second implementation manner of the first aspect of the embodiment of the present invention, in a fourth implementation manner of the first aspect of the embodiment of the present invention,

the second DCI further includes a C-RNTI of the second terminal.

With reference to the first aspect of the embodiment of the present invention, in a fifth implementation manner of the first aspect of the embodiment of the present invention, the method further includes:

and if the base station determines that the first terminal and the second terminal do not use the same time frequency resource in the current cell, the base station configures third DCI.

Specifically, the base station sets the second indication information in the third DCI when determining that the first terminal and the second terminal that detect the pairing relationship with each other in the current cell do not use the same time-frequency resource, so that the third DCI configured by the base station carries the second indication information.

The third DCI carries second indication information, where the second indication information is used to indicate that the first terminal and the second terminal do not use the same time-frequency resource in the current cell;

and the base station sends the third DCI carrying the second indication information to the first terminal, so that the first terminal does not eliminate the signal of the second terminal according to the second indication information.

With reference to the fifth implementation manner of the first aspect of the embodiment of the present invention, in a sixth implementation manner of the first aspect of the embodiment of the present invention,

the second indication information is new bit information added to the third DCI, or the second indication information is existing bit information in the third DCI.

A second aspect of an embodiment of the present invention provides an interference processing method, including:

a first terminal receives a cell radio network temporary identifier (C-RNTI) of a second terminal, which is sent by a base station, wherein the relationship between the first terminal and the second terminal is a pairing relationship;

the first terminal acquires first DCI of the second terminal according to the C-RNTI of the second terminal, wherein the first DCI carries scheduling information of the second terminal;

and under the condition that the first terminal and the second terminal use the same time-frequency resources in the current cell, the first terminal eliminates the signal of the second terminal according to the first DCI.

In combination with the second aspect of the embodiment of the present invention, in the first implementation manner of the second aspect of the embodiment of the present invention,

before the first terminal acquires the first DCI of the second terminal according to the C-RNTI of the second terminal, the method further includes:

the first terminal receives second Downlink Control Information (DCI) sent by the base station, wherein the second DCI carries first indication information, and the first indication information is used for indicating that the first terminal and the second terminal use the same time frequency resource in a current cell;

and the first terminal determines that the first terminal and the second terminal use the same time-frequency resources in the current cell according to the first indication information.

In combination with the first implementation manner of the second aspect of the embodiment of the present invention, in the second implementation manner of the second aspect of the embodiment of the present invention,

In combination with the second aspect of the embodiment of the present invention, in a third implementation manner of the second aspect of the embodiment of the present invention,

after the first terminal acquires the first DCI of the second terminal according to the C-RNTI of the second terminal, the method further includes:

the first terminal determines whether the first terminal and the second terminal use the same time-frequency resources in the current cell according to the first DCI;

if so, the first terminal executes the step that the first terminal eliminates the signal of the second terminal according to the first DCI;

and if not, the first terminal does not eliminate the signal of the second terminal.

With reference to the method according to any one of the second aspect of the embodiment of the present invention to the third implementation manner of the second aspect of the embodiment of the present invention, in a fourth implementation manner of the second aspect of the embodiment of the present invention,

the first terminal receiving the cell radio network temporary identifier C-RNTI of the second terminal sent by the base station comprises the following steps:

and the first terminal receives the C-RNTI of the second terminal through a Radio Resource Control (RRC) signaling.

With reference to the method according to any one of the first implementation manner of the second aspect of the embodiment of the present invention to the third implementation manner of the second aspect of the embodiment of the present invention, in a fifth implementation manner of the second aspect of the embodiment of the present invention,

the second DCI further includes a C-RNTI of the second terminal.

In combination with the second aspect of the embodiment of the present invention, in a sixth implementation manner of the second aspect of the embodiment of the present invention,

the method further comprises the following steps:

the first terminal receives third DCI sent by the base station, wherein the third DCI carries second indication information, and the second indication information is used for indicating that the first terminal and the second terminal do not use the same time frequency resource in the current cell;

and the first terminal does not eliminate the signal of the second terminal according to the second indication information.

With reference to the sixth implementation manner of the second aspect of the embodiment of the present invention, in the seventh implementation manner of the second aspect of the embodiment of the present invention,

A third aspect of an embodiment of the present invention provides a base station, including:

the first sending unit is configured to send a cell radio network temporary identifier C-RNTI of a second terminal to a first terminal, where a relationship between the first terminal and the second terminal is a pairing relationship, the C-RNTI of the second terminal is used for enabling the first terminal to obtain a first DCI of the second terminal according to the C-RNTI of the second terminal under a condition that the first terminal and the second terminal use the same time-frequency resource in a current cell, the first DCI carries scheduling information of the second terminal, and the first DCI is used for enabling the first terminal to eliminate a signal of the second terminal.

With reference to the third aspect of the embodiments of the present invention, in a first implementation manner of the third aspect of the embodiments of the present invention,

the base station further comprises:

a first configuration unit, configured to configure a second downlink control information DCI carrying first indication information if it is determined that the first terminal and the second terminal use the same time-frequency resource in a current cell, where the first indication information is used to indicate that the first terminal and the second terminal use the same time-frequency resource in the current cell;

and a second sending unit, configured to send the second DCI to the first terminal, so that the first terminal determines, according to the first indication information, that the first terminal and the second terminal use the same time-frequency resource in the current cell.

With reference to the first implementation manner of the third aspect of the embodiments of the present invention, in the second implementation manner of the third aspect of the embodiments of the present invention,

With reference to the method described in any one of the third aspect of the embodiment of the present invention to the second implementation manner of the third aspect of the embodiment of the present invention, in a third implementation manner of the third aspect of the embodiment of the present invention,

the first sending unit is further configured to send the C-RNTI of the second terminal to the first terminal through radio resource control signaling RRC.

With reference to the first implementation manner of the third aspect of the embodiment of the present invention or the second implementation manner of the third aspect of the embodiment of the present invention, in a fourth implementation manner of the third aspect of the embodiment of the present invention,

the second DCI further includes a C-RNTI of the second terminal.

With reference to the third aspect of the embodiments of the present invention, in a fifth implementation manner of the third aspect of the embodiments of the present invention,

the base station further comprises:

a second configuration unit, configured to configure a third DCI if it is determined that the first terminal and the second terminal do not use the same time-frequency resource in the current cell, where the third DCI carries second indication information, and the second indication information is used to indicate that the first terminal and the second terminal do not use the same time-frequency resource in the current cell;

a third sending unit, configured to send the third DCI carrying the second indication information to the first terminal, so that the first terminal does not cancel a signal of the second terminal according to the second indication information.

With reference to the fifth implementation manner of the third aspect of the embodiment of the present invention, in a sixth implementation manner of the third aspect of the embodiment of the present invention,

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

the first receiving unit is used for receiving a cell radio network temporary identifier C-RNTI (cell-radio network temporary identifier) of a second terminal, which is sent by a base station, wherein the relationship between the first terminal and the second terminal is a pairing relationship;

a first obtaining unit, configured to obtain first DCI of the second terminal according to a C-RNTI of the second terminal, where the first DCI carries scheduling information of the second terminal;

and a cancellation unit, configured to cancel, according to the first DCI, a signal of the second terminal when the first terminal and the second terminal use the same time-frequency resource in a current cell.

With reference to the fourth aspect of the embodiments, in a first implementation manner of the fourth aspect of the embodiments of the present invention,

the first terminal further comprises:

a second receiving unit, configured to receive second downlink control information DCI sent by the base station, where the second DCI carries first indication information, and the first indication information is used to indicate that the first terminal and the second terminal use the same time-frequency resource in a current cell;

a first determining unit, configured to determine, according to the first indication information, that the first terminal and the second terminal use the same time-frequency resource in a current cell.

With reference to the first implementation manner of the fourth aspect of the embodiments of the present invention, in the second implementation manner of the fourth aspect of the embodiments of the present invention,

With reference to the fourth aspect of the embodiments, in a third implementation manner of the fourth aspect of the embodiments,

the first terminal further comprises:

a second determining unit, configured to determine whether the first terminal and the second terminal use the same time-frequency resource in a current cell according to the first DCI;

a third determining unit, configured to, if the first terminal and the second terminal use the same time-frequency resource in the current cell, perform, by the first terminal, a step in which the first terminal cancels a signal of the second terminal according to the first DCI;

a fourth determining unit, configured to not eliminate the signal of the second terminal if the first terminal and the second terminal do not use the same time-frequency resource in the current cell.

With reference to the method according to any one of the fourth aspect of the embodiment of the present invention to the third implementation manner of the fourth aspect of the embodiment of the present invention, in the fourth implementation manner of the fourth aspect of the embodiment of the present invention,

the first receiving unit is further configured to receive the C-RNTI of the second terminal through radio resource control signaling RRC.

With reference to the method according to any one of the first implementation manner of the fourth aspect of the embodiment of the present invention to the third implementation manner of the fourth aspect of the embodiment of the present invention, in a fifth implementation manner of the fourth aspect of the embodiment of the present invention,

the second DCI further includes a C-RNTI of the second terminal.

With reference to the fourth aspect of the embodiments, in a sixth implementation manner of the fourth aspect of the embodiments of the present invention,

the first terminal further comprises:

a third receiving unit, configured to receive a third DCI sent by the base station, where the third DCI carries second indication information, and the second indication information is used to indicate that the first terminal and the second terminal do not use the same time-frequency resource in a current cell;

and the fifth determining unit is used for not eliminating the signal of the second terminal according to the second indication information.

With reference to the sixth implementation manner of the fourth aspect of the embodiment of the present invention, in the seventh implementation manner of the fourth aspect of the embodiment of the present invention,

A fifth aspect of the present embodiment provides an interference processing system, including a base station according to any one of the third aspect of the present embodiment to the sixth implementation manner of the third aspect of the present embodiment, a first terminal according to any one of the fourth aspect of the present embodiment to the seventh implementation manner of the fourth aspect of the present embodiment, and a second terminal, where a relationship between the first terminal and the second terminal is a pairing relationship.

Drawings

Fig. 1 is a schematic structural diagram of an interference processing system according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating an interference processing method according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an embodiment of setting first indication information through a second DCI according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an embodiment of the present invention in which a second DCI carries a C-RNTI of a second terminal;

fig. 5 is a schematic diagram of an embodiment of setting second indication information through a third DCI according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating steps of an interference processing method according to another embodiment of the present invention;

fig. 7 is a schematic diagram of another embodiment of the present invention in which a second DCI carries a C-RNTI of a second terminal;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an embodiment of a first terminal according to the present invention;

fig. 10 is a schematic structural diagram of another embodiment of the first terminal according to the embodiment of the present invention.

Detailed Description

First, an interference processing system applied to the interference processing method provided by the embodiment of the present invention is described with reference to fig. 1:

specifically, the interference processing system shown in this embodiment includes a base station 101, a second terminal 102, and a first terminal 103.

In this embodiment, the second terminal 102 and the first terminal 103 are paired terminals.

A detailed description of how the base station 101 pairs the second terminal 102 and the first terminal 103 is given in the prior art, and is not repeated in this embodiment.

Only paired terminals allow the same time and frequency resources to be used, and it can be seen that the first terminal 102 and the second terminal 103 shown in this embodiment are terminals that can use the same time and frequency resources.

In the current cell, the second terminal 102 and the first terminal 103 may use the same time-frequency resource to overlap on the same antenna port using different power configurations.

More specifically, the first terminal 103 is located at the center of the current cell, and is allocated with lower power by the base station 101, that is, the first terminal is a low-path-loss terminal.

The second terminal 102 is located at the edge of the current cell, and is allocated with higher power by the base station 101, that is, the second terminal is a high-path-loss terminal.

Based on the interference processing system shown in fig. 1, the following describes in detail the specific implementation procedure of the interference processing method provided in this embodiment with reference to fig. 2:

step 201, the base station determines whether the first terminal and the second terminal use the same time frequency resource in the current cell, if yes, step 202 is executed, and if no, step 210 is executed.

And the base station detects whether the first terminal and the second terminal which are in pairing relation with each other use the same time frequency resource in the current cell.

Fig. 1 shows details of specific descriptions of the first terminal and the second terminal, which are not described in detail in this embodiment.

The base station detects whether the first terminal and the second terminal that are in a pairing relationship use the same time frequency resource is the prior art, and details are not specifically described in this embodiment.

If the first terminal and the second terminal use the same time-frequency resource in the current cell, the signal of the second terminal may cause interference to the first terminal.

If the first terminal and the second terminal do not use the same time-frequency resource in the current cell, the signal of the second terminal cannot cause interference to the first terminal.

Step 202, the base station configures second downlink control information DCI carrying the first indication information.

The first indication information is used for indicating that the first terminal and the second terminal use the same time-frequency resource in the current cell.

Specifically, the base station sets the first indication information in the second DCI when determining that the first terminal and the second terminal that detect the pairing relationship with each other in the current cell use the same time-frequency resource, so that the second DCI configured by the base station carries the first indication information.

More specifically, how the base station sets the first indication information in the second DCI is described below, it should be understood that the description of the second DCI capable of carrying the first indication information in this embodiment is by way of example and is not limited thereto.

As shown in fig. 3, the second DCI in this embodiment includes the original DCI information of the first terminal.

For the specific content of the scheduling information included in the original DCI information configured by the base station for the first terminal, please refer to the prior art in detail, and details are not described in this embodiment.

In this embodiment, the second DCI configured by the base station further includes the first indication information.

Specifically, the first indication information is new bit information added to the second DCI, or the first indication information is existing bit information in the second DCI.

It should be clear that, in this embodiment, a description of how to specifically set the first indication information in the second DCI is an optional example, and is not limited, as long as the first terminal can determine that the first terminal and the second terminal use the same time-frequency resource in the current cell according to the first indication information.

For example, the first indication information shown in this embodiment may be a field including a certain content, for example, the content included in the first indication information may be: the first terminal and the second terminal use the same time frequency resource in the current cell.

For example, the first indication information shown in this embodiment may be an identifier, that is, the base station and the first terminal may pre-establish a correspondence between the identifier and a content indicated by the identifier, where the content indicated by the identifier may be: the first terminal and the second terminal use the same time frequency resource in the current cell.

The base station may send the second DCI including the identifier to the first terminal, and the first terminal may determine the content indicated by the identifier corresponding to the identifier, that is, the first terminal determines that the first terminal and the second terminal use the same time-frequency resource in the current cell.

Step 203, the base station sends the second DCI to the first terminal.

And step 204, the first terminal receives the second DCI.

Step 205, the first terminal determines, according to the first indication information included in the second DCI, that the first terminal and the second terminal use the same time-frequency resource in the current cell.

Please refer to step 202 for details of how to set the first indication information in the second DCI, which are not described in detail in this embodiment.

And step 206, the base station sends the cell radio network temporary identifier C-RNTI of the second terminal to the first terminal.

Under the condition that the base station determines that the first terminal and the second terminal use the same time-frequency resources in the current cell, the base station can determine to send the C-RNTI of the second terminal to the first terminal.

In this embodiment, how the base station specifically sends the C-RNTI of the second terminal to the first terminal is not limited.

It should be clear that, the following description of how the base station specifically sends the C-RNTI of the second terminal to the first terminal is an optional example and is not limited.

For example, the base station may transmit the C-RNTI of the second terminal to the first terminal through radio resource control signaling RRC.

If the base station sends the C-RNTI of the second terminal to the first terminal through RRC, there is no chronological relationship between step 206 and steps 202 to 205 in this embodiment.

For example, the base station may transmit the C-RNTI of the second terminal to the first terminal through the second DCI.

Specifically, as shown in fig. 4, in this setting, with respect to the second DCI shown in fig. 3, the C-RNTI of the second terminal may also be set in the second DCI.

And the first terminal can acquire the C-RNTI of the second terminal after receiving the second DCI.

If the base station sends the C-RNTI of the second terminal to the first terminal through the second DCI, step 206 and step 203 shown in this embodiment are executed simultaneously in an execution timing sequence.

And step 207, the first terminal receives the C-RNTI of the second terminal.

And step 208, the first terminal acquires the first DCI of the second terminal according to the C-RNTI of the second terminal.

And the first terminal can acquire the first DCI of the second terminal when acquiring the C-RNTI of the second terminal which is only corresponding to the second terminal.

How to acquire DCI according to C-RNTI is the prior art, and details are not described in this embodiment.

And 209, the first terminal eliminates the signal of the second terminal according to the first DCI.

Specifically, the first terminal may obtain the scheduling information of the second terminal carried by the first DCI.

Because the first terminal determines that the first terminal and the second terminal use the same time frequency resource in the current cell according to the first indication information, the first terminal can eliminate the signal of the second terminal according to the scheduling information of the second terminal, thereby effectively avoiding the interference of the signal of the second terminal to the first terminal.

Step 210, the base station configures a third DCI.

After step 201, in a case that the base station determines that the first terminal and the second terminal do not use the same time-frequency resource in the current cell, the base station may configure the third DCI.

Specifically, the third DCI carries second indication information, where the second indication information is used to indicate that the first terminal and the second terminal do not use the same time-frequency resource in the current cell.

The second indication information is used for indicating that the first terminal and the second terminal do not use the same time-frequency resource in the current cell.

More specifically, how the base station sets the second indication information in the third DCI is described below, it should be clear that the description of the third DCI capable of carrying the second indication information in this embodiment is by way of example and is not limited.

As shown in fig. 5, the third DCI in this embodiment includes the original DCI information of the first terminal.

In this embodiment, the third DCI configured by the base station for the first terminal is carried by a PDCCH (Physical Downlink Control Channel, which is called as a Physical Downlink Control Channel in all english).

For the first terminal, the physical layer of the first terminal acquires the third DCI belonging to the first terminal through blind detection.

In this embodiment, the third DCI configured by the base station further includes the second indication information.

Specifically, the second indication information is new bit information added to the third DCI, or the second indication information is existing bit information in the third DCI.

It should be clear that, in this embodiment, a description of how to specifically set the second indication information in the third DCI is an optional example, and is not limited, as long as the first terminal can determine, according to the second indication information, that the first terminal and the second terminal do not use the same time-frequency resource in the current cell.

For example, the second indication information shown in this embodiment may be a field containing a certain content, for example, the content contained in the second indication information may be: the first terminal and the second terminal do not use the same time-frequency resources in the current cell.

For example, the second indication information shown in this embodiment may be an identifier, that is, the base station and the first terminal may pre-establish a correspondence between the identifier and a content indicated by the identifier, where the content indicated by the identifier may be: the first terminal and the second terminal do not use the same time-frequency resources in the current cell.

The base station may send the third DCI including the identifier to the first terminal, and the first terminal may determine the content indicated by the identifier corresponding to the identifier, so that the first terminal determines that the first terminal and the second terminal do not use the same time-frequency resource in the current cell.

Step 211, the base station sends the third DCI to the first terminal.

Step 212, the first terminal receives the third DCI.

In this embodiment, after receiving the third DCI, the first terminal may determine, according to the second indication information, that the first terminal and the second terminal do not use the same time-frequency resource in the current cell, so that the first terminal may determine that a signal of the second terminal does not interfere with the first terminal, and the first terminal may determine, according to the second indication information, that the signal of the second terminal does not need to be eliminated.

In the interference processing method shown in fig. 2, the base station determines whether the first terminal and the second terminal use the same time-frequency resource in the current cell, and notifies the first terminal through indication information. The following describes how to implement the interference handling method when the first terminal determines whether the first terminal and the second terminal use the same time-frequency resources in the current cell, with reference to fig. 6.

Step 601, the first terminal receives a cell radio network temporary identifier C-RNTI of the second terminal sent by the base station.

Specific descriptions of the first terminal, the second terminal, and the base station are shown in fig. 1, and are not described in detail in this embodiment.

In this embodiment, the base station may not determine whether the first terminal and the second terminal use the same time-frequency resource in the current cell, and the base station may directly send the C-RNTI of the second terminal to the first terminal.

And the second DCI comprises the original DCI information configured for the first terminal by the base station.

The original DCI information of the first terminal is configured by the base station and includes various scheduling information of the first terminal.

In this embodiment, the base station configures, for the first terminal, the original DCI information of the first terminal, where the information is carried by a PDCCH (Physical Downlink Control Channel, which is called by the full chinese language).

For the first terminal, the physical layer of the first terminal obtains the original DCI information belonging to the first terminal through blind detection.

Optionally, as shown in fig. 7, the second DCI configured by the base station in this embodiment may further be provided with a C-RNTI of the second terminal.

The first terminal may obtain the C-RNTI of the second terminal after receiving the second DCI.

Step 602, the first terminal obtains the first DCI of the second terminal according to the C-RNTI of the second terminal.

In this embodiment, after the first terminal acquires the C-RNTI of the second terminal, the first DCI of the second terminal may be acquired according to the C-RNTI of the second terminal.

Specifically, the first DCI of the second terminal carries various scheduling information configured by the base station for the second terminal.

For details, see the prior art for details, and are not specifically described in this embodiment, how the second terminal specifically obtains the first DCI of the second terminal according to the C-RNTI of the second terminal.

Step 603, the first terminal determines whether the first terminal and the second terminal use the same time-frequency resource in the current cell according to the first DCI, if so, step 604 is executed, and if not, step 605 is executed.

In this embodiment, after acquiring the first DCI of the second terminal, the first terminal may determine whether the first terminal and the second terminal use the same time-frequency resource in the current cell according to the scheduling information of the second terminal included in the first DCI.

If the first terminal and the second terminal use the same time frequency resource in the current cell, the first terminal may determine that the signal of the second terminal can cause interference to the first terminal.

If the first terminal and the second terminal do not use the same time frequency resource in the current cell, the first terminal may determine that the signal of the second terminal cannot cause interference to the first terminal.

And step 604, the first terminal eliminates the signal of the second terminal according to the first DCI.

Because the first terminal and the second terminal use the same time frequency resource in the current cell, the first terminal can eliminate the signal of the second terminal according to the scheduling information of the second terminal, thereby effectively avoiding the interference of the signal of the second terminal to the first terminal.

Step 605, the first terminal determines not to cancel the signal of the second terminal.

Since the first terminal and the second terminal do not use the same time-frequency resource in the current cell, the first terminal may not need to eliminate the signal of the second terminal that cannot cause interference to the first terminal.

In the embodiments shown in fig. 2 and fig. 6, if the second terminal paired with the first terminal is changed, the base station may replace the second terminal paired with the first terminal, and the base station may complete the update of the C-RNTI information of the second terminal paired with the first terminal through RRC reconfiguration, and re-execute the interference processing method shown in fig. 2 and fig. 6.

It should be noted that, as shown in fig. 1, fig. 2 and fig. 6, the first terminal is a low-path-loss terminal, and the second terminal is a high-path-loss terminal, which are exemplified, that is, the method shown in fig. 2 and fig. 6 can eliminate the interference signal from the low-path-loss terminal to the high-path-loss terminal.

In other embodiments, the first terminal may also be a high-path-loss terminal, and the second terminal may also be a low-path-loss terminal, so that the interference signal from the high-path-loss terminal to the low-path-loss terminal can be eliminated by the methods shown in fig. 2 and fig. 6.

The following explains the beneficial effects of the interference handling method provided by fig. 2 and 6:

In the interference processing method shown in fig. 2 of this embodiment, the base station may indicate, through indication information, whether the first terminal and the second terminal in the current cell use the same time-frequency resource, and the first terminal may obtain the first DCI of the second terminal for interference cancellation only when it is determined that the first terminal and the second terminal in the current cell use the same time-frequency resource, which means that the first terminal does not need to detect the first DCI of the second terminal that cannot cause interference to the first terminal, so that the efficiency of the first terminal in interference cancellation is improved, and waste of the first terminal resource is avoided.

In the interference processing method shown in fig. 2 of this embodiment, a base station may carry the first indication information or the second indication information in the second DCI configured for the first terminal, the first terminal can determine whether the signal of the second terminal can cause interference to the first terminal according to the first indication information and the second indication information, the base station can perform subframe-level adjustment on the first terminal through the indication information in the second DCI, the first terminal determines whether there is a second terminal capable of causing interference at a subframe level, for example, the first terminal can determine a subframe in which only the first terminal is scheduled according to the first DCI and the second DCI, and/or only the second terminal obtains the scheduled subframe, and/or the first terminal and the second terminal together obtain the scheduled subframe. The first terminal can eliminate the signal of the second terminal at the sub-frame level, so that the accuracy and flexibility in the interference elimination process are improved, and the possibility that the signal of the second terminal interferes with the first terminal at the sub-frame level is avoided.

In the interference processing method shown in fig. 6 of this embodiment, the base station does not need to determine whether the first terminal and the second terminal use the same time-frequency resource in the current cell, but directly sends the C-RNTI of the second terminal to the first terminal, so that the processing time of the base station in the interference cancellation process is reduced, and the resource consumption of the base station is reduced.

The specific structure of the base station provided in this embodiment is described in detail below with reference to fig. 8:

the base station shown in fig. 8 can execute the interference processing method shown in fig. 2, and for a specific execution process, please refer to fig. 2 in detail, which is not described in detail in this embodiment.

The base station includes:

a first configuration unit 801, configured to configure a second downlink control information DCI carrying first indication information if it is determined that the first terminal and the second terminal use the same time-frequency resource in a current cell, where the first indication information is used to indicate that the first terminal and the second terminal use the same time-frequency resource in the current cell;

A second sending unit 802, configured to send the second DCI to the first terminal, so that the first terminal determines, according to the first indication information, that the first terminal and the second terminal use the same time-frequency resource in a current cell.

A first sending unit 803, configured to send a cell radio network temporary identifier C-RNTI of a second terminal to a first terminal, where a relationship between the first terminal and the second terminal is a paired relationship, and the C-RNTI of the second terminal is used to enable the first terminal to obtain a first DCI of the second terminal according to the C-RNTI of the second terminal under a condition that the first terminal and the second terminal use the same time-frequency resource in a current cell, where the first DCI carries scheduling information of the second terminal, and the first DCI is used to enable the first terminal to eliminate a signal of the second terminal.

Optionally, the first sending unit 803 is further configured to send the C-RNTI of the second terminal to the first terminal through radio resource control signaling RRC.

Optionally, the second DCI further includes a C-RNTI of the second terminal.

A second configuring unit 804, configured to configure a third DCI if it is determined that the first terminal and the second terminal do not use the same time-frequency resource in the current cell, where the third DCI carries second indication information, and the second indication information is used to indicate that the first terminal and the second terminal do not use the same time-frequency resource in the current cell;

a third sending unit 805, configured to send the third DCI carrying the second indication information to the first terminal, so that the first terminal does not eliminate the signal of the second terminal according to the second indication information.

And adding new bit information to the third DCI, or adding existing bit information to the third DCI.

A detailed description is given below on a specific structure of the first terminal with reference to fig. 9, where the first terminal shown in fig. 9 is capable of executing the interference processing method shown in fig. 2, and a detailed execution process is shown in fig. 2 and is not described in detail in this embodiment.

The first terminal includes:

a second receiving unit 901, configured to receive second downlink control information DCI sent by the base station, where the second DCI carries first indication information, and the first indication information is used to indicate that the first terminal and the second terminal use the same time-frequency resource in a current cell;

The second DCI further includes a C-RNTI of the second terminal.

A first determining unit 902, configured to determine, according to the first indication information, that the first terminal and the second terminal use the same time-frequency resource in the current cell.

A first receiving unit 903, configured to receive a cell radio network temporary identifier C-RNTI of a second terminal sent by a base station, where a relationship between the first terminal and the second terminal is a pairing relationship;

the first receiving unit 903 is further configured to receive the C-RNTI of the second terminal through radio resource control signaling RRC.

A first obtaining unit 904, configured to obtain a first DCI of the second terminal according to the C-RNTI of the second terminal, where the first DCI carries scheduling information of the second terminal;

a removing unit 905, configured to remove, according to the first DCI, a signal of the second terminal when the first terminal and the second terminal use the same time-frequency resource in a current cell.

A third receiving unit 906, configured to receive a third DCI sent by the base station, where the third DCI carries second indication information, and the second indication information is used to indicate that the first terminal and the second terminal do not use the same time-frequency resource in a current cell;

A fifth determining unit 907, configured to not eliminate the signal of the second terminal according to the second indication information.

Another structure of the first terminal is described below with reference to fig. 10, where the structure shown in fig. 10 of the first terminal is capable of executing the interference processing method shown in fig. 6, and a specific execution process is shown in fig. 6, and is not described in detail in this embodiment.

The first terminal includes:

a first receiving unit 1001, configured to receive a cell radio network temporary identifier C-RNTI of a second terminal sent by a base station, where a relationship between the first terminal and the second terminal is a pairing relationship;

a first obtaining unit 1002, configured to obtain a first DCI of the second terminal according to a C-RNTI of the second terminal, where the first DCI carries scheduling information of the second terminal;

a second determining unit 1003, configured to determine whether the first terminal and the second terminal use the same time-frequency resource in a current cell according to the first DCI;

a third determining unit 1004, configured to, if the first terminal and the second terminal use the same time-frequency resource in the current cell, perform, by the first terminal, a step of eliminating, by the first terminal, a signal of the second terminal according to the first DCI;

a removing unit 1005, configured to remove a signal of the second terminal according to the first DCI when the first terminal and the second terminal use the same time-frequency resource in a current cell.

A fourth determining unit 1006, configured to not eliminate the signal of the second terminal if the first terminal and the second terminal do not use the same time-frequency resource in the current cell.

The embodiment also provides an interference processing system capable of executing the interference processing method.

For a specific process of the interference processing that can be performed by the interference processing system, please refer to fig. 2 to fig. 6 in detail, which is not described in detail in this embodiment.

The interference processing system comprises a base station, a first terminal and a second terminal.

The physical structure of the interference processing system is shown in fig. 1, and is not described in detail in this embodiment.

The detailed structure of the base station is shown in fig. 8, and the detailed structure of the first terminal is shown in fig. 9 to 10, which are not described in detail in this embodiment.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An interference processing method, comprising:

a base station sends a cell radio network temporary identifier (C-RNTI) of a second terminal to a first terminal, wherein the relation between the first terminal and the second terminal is a pairing relation, the C-RNTI of the second terminal is used for enabling the first terminal to obtain a first DCI of the second terminal according to the C-RNTI of the second terminal under the condition that the first terminal and the second terminal use the same time-frequency resources in a current cell, the first DCI carries scheduling information of the second terminal, and the scheduling information of the second terminal is used for enabling the first terminal to eliminate signals of the second terminal;

the first terminal is a low-path-loss terminal, and the second terminal is a high-path-loss terminal.

2. The method of claim 1, wherein before the base station sends the cell radio network temporary identity C-RNTI of the second terminal to the first terminal, the method further comprises:

if the base station determines that the first terminal and the second terminal use the same time frequency resources in the current cell, the base station configures second Downlink Control Information (DCI) carrying first indication information, wherein the first indication information is used for indicating that the first terminal and the second terminal use the same time frequency resources in the current cell;

3. The method of claim 2, wherein the first indication information is new bit information added to the second DCI, or wherein the first indication information is existing bit information in the second DCI.

4. The method according to any of claims 1 to 3, wherein the base station sending the cell radio network temporary identity C-RNTI of the second terminal to the first terminal comprises:

5. The method of claim 2 or 3, wherein the second DCI further comprises a C-RNTI for the second terminal.

6. The method of claim 1, further comprising:

if the base station determines that the first terminal and the second terminal do not use the same time-frequency resources in the current cell, the base station configures third DCI, wherein the third DCI carries second indication information, and the second indication information is used for indicating that the first terminal and the second terminal do not use the same time-frequency resources in the current cell;

7. The method of claim 6, wherein the second indication information is new bit information added to the third DCI, or wherein the second indication information is existing bit information in the third DCI.

8. An interference processing method, comprising:

under the condition that the first terminal and the second terminal use the same time frequency resource in the current cell, the first terminal eliminates the signal of the second terminal according to the scheduling information of the second terminal;

9. The method of claim 8, wherein before the first terminal obtains the first DCI for the second terminal according to the C-RNTI of the second terminal, the method further comprises:

10. The method of claim 9, wherein the first indication information is new bit information added to the second DCI, or wherein the first indication information is existing bit information in the second DCI.

11. The method of claim 8, wherein after the first terminal obtains the first DCI for the second terminal according to the C-RNTI of the second terminal, the method further comprises:

12. The method according to any of claims 8 to 11, wherein the receiving, by the first terminal, the cell radio network temporary identity C-RNTI of the second terminal sent by the base station comprises:

13. The method according to any of claims 9 to 11, wherein the second DCI further comprises a C-RNTI of the second terminal.

14. The method of claim 8, further comprising:

15. The method of claim 14, wherein the second indication information is new bit information added to the third DCI, or wherein the second indication information is existing bit information in the third DCI.

16. A base station, comprising:

a first sending unit, configured to send a cell radio network temporary identifier C-RNTI of a second terminal to a first terminal, where a relationship between the first terminal and the second terminal is a pairing relationship, the C-RNTI of the second terminal is used for enabling the first terminal to obtain a first DCI of the second terminal according to the C-RNTI of the second terminal under a condition that the first terminal and the second terminal use the same time-frequency resource in a current cell, the first DCI carries scheduling information of the second terminal, and the scheduling information of the second terminal is used for enabling the first terminal to eliminate a signal of the second terminal;

17. The base station of claim 16, wherein the base station further comprises:

18. The base station of claim 17, wherein the first indication information is new bit information added to the second DCI, or wherein the first indication information is existing bit information in the second DCI.

19. The base station according to any of claims 16 to 18, wherein the first sending unit is further configured to send the C-RNTI of the second terminal to the first terminal through radio resource control signaling, RRC.

20. The base station according to claim 17 or 18, wherein the second DCI further comprises a C-RNTI of the second terminal.

21. The base station of claim 16, wherein the base station further comprises:

22. The base station of claim 21, wherein the second indication information is new bit information added to the third DCI, or wherein the second indication information is existing bit information in the third DCI.

23. A first terminal, comprising:

a removing unit, configured to remove, according to scheduling information of the second terminal, a signal of the second terminal when the first terminal and the second terminal use the same time-frequency resource in a current cell;

24. The first terminal of claim 23, wherein the first terminal further comprises:

25. The first terminal of claim 24, wherein the first indication information is new bit information added to the second DCI, or wherein the first indication information is existing bit information in the second DCI.

26. The first terminal of claim 23, wherein the first terminal further comprises:

27. The first terminal according to any of claims 23 to 26, wherein the first receiving unit is further configured to receive the C-RNTI of the second terminal through radio resource control signaling, RRC.

28. The first terminal according to any of claims 24 to 26, wherein the second DCI further comprises a C-RNTI of the second terminal.

29. The first terminal of claim 23, wherein the first terminal further comprises:

30. The first terminal of claim 29, wherein the second indication information is new bit information added to the third DCI, or wherein the second indication information is existing bit information in the third DCI.

31. An interference processing system comprising a base station according to any one of claims 16 to 22, a first terminal according to any one of claims 23 to 30, and a second terminal, wherein the relationship between the first terminal and the second terminal is a paired relationship.