TECHNICAL FIELD

The present disclosure relates to the field of communications technology, and in particular to a wireless communication method and device, and a network device.

BACKGROUND

The relay technology is a wireless communication technology in which one or more relay nodes are added between a base station and a terminal device which is also known as user equipment (UE), and the relay node forwards radio signals one or more times. In a typical application scenario of a relay system, as shown inFIG.1, the application scenario includes: a donor gNB101, a relay node102, and a terminal device103. A cell served by the donor gNB101is referred to as a donor cell. A cell served by the relay node102is referred to as a relay cell. A communication link between the donor gNB101and the relay node102is referred to as a backhaul link, which is also known as backhaul or backhaullink. A communication link between the relay node102and the terminal device103that accesses a relay cell is referred to as an access link.

In the related art, a time division multiplexing (TDM) scheme is adopted to ensure that the relay node can normally receive and transmit signals in a half-duplex operation mode.

However, since four slots are required to complete a bidirectional signal transmission between the donor gNB and the terminal device, and the donor gNB and the terminal device are idle for half of the time, it will cause a large transmission delay and low system communication efficiency.

SUMMARY

An object of embodiments of the present disclosure is to provide a wireless communication method and device, and a network device.

A first aspect of the present disclosure provides a wireless communication method, operable by a relay node, including:

determining a target reception power value;

performing control on at least one of a first transmission power or a second transmission power according to the target reception power value, thereby enabling a difference between a first reception power and a second reception power to be less than a preset power threshold;

wherein the first transmission power is a transmission power of a backhaul downlink (DL) signal transmitted by a donor gNB of the relay node to the relay node;

the second transmission power is a transmission power of an access uplink (UL) signal transmitted by a terminal device to the relay node;

the first reception power is a reception power when the backhaul DL signal from the donor gNB reaches the relay node;

the second reception power is a reception power when the access UL signal from the terminal device reaches the relay node.

A second aspect of the present disclosure provides a wireless communication method, operable by a donor gNB, including:

receiving at least one of a target reception power value or a first power adjustment instruction transmitted by a relay node of the donor gNB;

according to at least one of the target reception power value or the first power adjustment instruction, adjusting a first transmission power;

wherein the first transmission power is a transmission power of a backhaul downlink (DL) signal transmitted by the donor gNB to the relay node;

the target reception power value is used by the donor gNB to determine the first transmission power; the first transmission power is determined by the target reception power value and a path loss of a backhaul link between the relay node and the donor gNB; the backhaul DL signal is transmitted on the backhaul link;

the first power adjustment instruction is configured to instruct the donor gNB to increase or decrease the first transmission power, thereby enabling a difference between the first reception power and the target reception power value to be less than a preset power threshold;

the first reception power is a reception power when the backhaul DL signal from the donor gNB reaches the relay node.

A third aspect of the present disclosure provides a wireless communication method, operable by a relay node, including:

determining a reference time;

performing control on at least one of a first transmission time or a second transmission time according to the reference time, thereby enabling a difference between a first reception time and a second reception time to be less than a preset time difference;

wherein the first transmission time is a transmission time of a backhaul downlink (DL) signal transmitted by a donor gNB of the relay node to the relay node;

the second transmission time is a transmission time of an access uplink (UL) signal transmitted by a terminal device to the relay node;

the first reception time is a moment when the backhaul DL signal from the donor gNB reaches the relay node;

the second reception time is a moment when the access UL signal from the terminal device reaches the relay node.

A fourth aspect of the present disclosure provides a wireless communication method, operable by a donor gNB, including:

receiving a first time adjustment instruction transmitted by a relay node of the donor gNB;

adjusting first transmission time according to the first time adjustment instruction;

wherein the first transmission time is a transmission time of a backhaul downlink (DL) signal transmitted by the donor gNB to the relay node;

the first time adjustment instruction is configured to instruct the donor gNB to advance or delay the first transmission time, thereby enabling the difference between the first reception time and the reference time determined by the relay node to be less than the preset time difference;

the first reception time is a moment when the backhaul DL signal from the donor gNB reaches the relay node.

A fifth aspect of the present disclosure provides a wireless communication device, applied to a relay node, including:

a first determining unit configured to determine a target reception power value;

a first control unit configured to, according to the target reception power value, perform control on at least one of a first transmission power or a second transmission power, thereby enabling a difference between a first reception power and a second reception power to be less than a preset power threshold;

wherein the first transmission power is a transmission power of a backhaul downlink (DL) signal transmitted by a donor gNB of the relay node to the relay node;

the second transmission power is a transmission power of an access UL signal transmitted by a terminal device to the relay node;

the first reception power is a reception power when the backhaul DL signal from the donor gNB reaches the relay node;

the second reception power is a reception power when the access UL signal from the terminal device reaches the relay node

A sixth aspect of the present disclosure provides a wireless communication device, applied to a donor gNB, including:

a second receiving unit configured to receive at least one of a target reception power value or a first power adjustment instruction transmitted by a relay node of the donor gNB;

a first adjustment unit configured to adjust a first transmission power according to at least one of the target reception power value or the first power adjustment instruction;

wherein the first transmission power is a transmission power of a backhaul downlink (DL) signal transmitted by the donor gNB to the relay node;

the target reception power value is used by the donor gNB to determine the first transmission power; the first transmission power is determined by the target reception power value and a path loss of a backhaul link between the relay node and the donor gNB; the backhaul DL signal is transmitted on the backhaul link;

the first power adjustment instruction is configured to instruct the donor gNB to increase or decrease the first transmission power, thereby enabling a difference between the first reception power and the target reception power value to be less than a preset power threshold;

the first reception power is a reception power when the backhaul DL signal from the donor gNB reaches the relay node.

A seventh aspect of the present disclosure provides a wireless communication device, applied to a relay node, including:

a second determining unit configured to determine a reference time;

a second control unit configured to, according to the reference time, perform control on at least one of a first transmission time or a second transmission time, thereby enabling a difference between a first reception time and a second reception time to be less than a preset time difference;

wherein the first transmission time is a transmission time of a backhaul downlink (DL) signal transmitted by a donor gNB of the relay node to the relay node;

the second transmission time is a transmission time of an access uplink (UL) signal transmitted by a terminal device to the relay node;

the first reception time is a moment when the backhaul DL signal from the donor gNB reaches the relay node;

the second reception time is a moment when the access UL signal from the terminal device reaches the relay node.

An eighth aspect of the present disclosure provides a wireless communication device, applied to a donor gNB, including:

a third receiving unit configured to receive a first time adjustment instruction transmitted by a relay node of the donor gNB;

a second adjustment unit configured to adjust first transmission time according to the first time adjustment instruction;

wherein the first transmission time is a transmission time of a backhaul downlink (DL) signal transmitted by the donor gNB to the relay node;

the first time adjustment instruction is configured to instruct the donor gNB to advance or delay the first transmission time, thereby enabling a difference between the first reception time and the reference time determined by the relay node to be less than the preset time difference;

the first reception time is a moment when the backhaul DL signal from the donor gNB reaches the relay node.

A ninth aspect of the present disclosure provides a network device, including a memory, a processor, and a program stored on the memory and executable on the processor; wherein the program is executed by the processor to implement steps of the wireless communication method applied to the relay node.

A tenth aspect of the present disclosure provides a network device, including: a memory, a processor, and a program stored on the memory and executable on the processor; wherein the program is executed by the processor to implement steps of the wireless communication method applied to the donor gNB.

An eleventh aspect of the present disclosure provides a computer readable storage medium, including: a program stored thereon; wherein the program is executed by a processor to implement the steps of the wireless communication method applied to the relay node.

A twelfth aspect of the present disclosure provides a computer readable storage medium, including: a program stored thereon; wherein the program is executed by a processor to implement the steps of the wireless communication method applied to the donor gNB.

It can be seen from the technical solutions provided in the foregoing embodiments of the present disclosure that the technical solutions of the embodiments of the present disclosure have at least one of the following technical effects.

In the embodiment of the present disclosure, the relay node can control at least one of the transmission power of the backhaul DL signal from the donor gNB or the transmission power of the access UL signal from the terminal device, according to the target reception power value, so that the difference between the signal power of the backhaul DL signal when the backhaul DL signal reaches the relay node and the signal power of the access UL signal from the terminal device when the access UL signal from the terminal device reaches the relay node, is within the tolerance range of the relay node, thereby ensuring simultaneous operation of the backhaul link and the access link in the relay system, enabling the backhaul link and the access link to be effectively multiplexed in the FDM or SDM mode. In this way, when maintaining the half-duplex operation mode of the relay node, the communication delay can be reduced and the communication efficiency of the system can be improved. In addition, there is no higher requirement on the capability of the relay node, and the relay node still performs signal reception and transmission operations in half-duplex mode, thus the equipment cost is not increased.

In this embodiment, the donor gNB can adjust the transmission power of the backhaul DL signal from the donor gNB in cooperation with the power control mechanism of the relay node, so that the difference between the signal power of the backhaul DL signal when the backhaul DL signal reaches the relay node and the signal power of the access UL signal from the terminal device when the access UL signal from the terminal device reaches the relay node, is within the tolerance range of the relay node, thereby ensuring simultaneous operation of the backhaul link and the access link in the relay system, enabling the backhaul link and the access link to be effectively multiplexed in the FDM or SDM mode. In this way, when maintaining the half-duplex operation mode of the relay node, the communication delay can be reduced and the communication efficiency of the system can be improved. In addition, there is no higher requirement on the capability of the relay node, and the relay node still performs signal reception and transmission operations in half-duplex mode, thus the equipment cost is not increased.

in this embodiment, the relay node can control at least one of the transmission time of the backhaul DL signal from the donor gNB or the transmission time of the access UL signal from the terminal device, according to the reference time, so that in the same slot or the same time interval, the difference between the moment when the backhaul DL signal from the donor gNB reaches the relay node and the moment when the access UL signal from the terminal device reaches the relay node is within the tolerance range of the relay node, thereby ensuring simultaneous operation of the backhaul link and the access link in the relay system, enabling the backhaul link and the access link to be effectively multiplexed in the FDM or SDM mode. In this way, when maintaining the half-duplex operation mode of the relay node, the communication delay can be reduced and the communication efficiency of the system can be improved. In addition, there is no higher requirement on the capability of the relay node, and the relay node still performs signal reception and transmission operations in half-duplex mode, thus the equipment cost is not increased.

in this embodiment, the donor gNB can adjust the transmission time of the backhaul DL signal from the donor gNB in cooperation with the transmission time control mechanism of the relay node, so that in the same slot or the same time interval, the difference between the moment when the backhaul DL signal from the donor gNB reaches the relay node and the moment when the access UL signal from the terminal device reaches the relay node is within the tolerance range of the relay node, thereby ensuring simultaneous operation of the backhaul link and the access link in the relay system, enabling the backhaul link and the access link to be effectively multiplexed in the FDM or SDM mode. In this way, when maintaining the half-duplex operation mode of the relay node, the communication delay can be reduced and the communication efficiency of the system can be improved. In addition, there is no higher requirement on the capability of the relay node, and the relay node still performs signal reception and transmission operations in half-duplex mode, thus the equipment cost is not increased.

