Method and device used for relay wireless communication
View Patent ↗The present disclosure provides a method and device used for relay wireless communications. A first node transmits a first radio signal, the first radio signal comprises a first message; transmits a third radio signal on a first radio resource; and receives a second radio signal, the second radio signal comprises a second message, the second message is used to indicate the first radio resource; wherein the first message is used to trigger the second message, and the first radio resource is used for a non-competitive random access. In the L2 relay communication architecture of the present disclosure, the first node acquires a UL synchronization through a non-competitive random access procedure, which can effectively support transmitting end-to-end control information of the PHY layer or the higher layer via a Uu interface.
1. A first node for wireless communications, comprising:
a first transmitter, transmitting a first radio signal to a base station before transmitting a third radio signal, the first radio signal comprising a first message; generating a third message; as a response to generating the third message, transmitting the third radio signal to the base station on a first radio resource; and
a first receiver, receiving a second radio signal, the second radio signal comprising a second message, the second message being used to indicate the first radio resource; and after receiving the second radio signal, switching to communicate with the base station through a relay node;
wherein the first radio signal is transmitted through a Physical Uplink Shared Channel (PUSCH); the first message comprises a Medium Access Control (MAC) Control Element (CE), and a value of a Logical Channel Identity (LCID) of the first message is a positive integer ranging from 35 to 44; the first message is used to trigger the second message, and the first radio resource is used for a contention-free random access.
2. The first node according to claim 1 , wherein the third radio signal is triggered by a third message;
wherein the third message comprises at least one of a physical-layer message or a higher-layer message; the value of the Logical Channel Identity of the first message is 43.
3. The first node according to claim 1 , comprising:
the first receiver, receiving a fourth radio signal, the fourth radio signal comprising a fourth message;
wherein the third radio signal is used to trigger the fourth message; and the fourth message is used for an uplink synchronization.
4. The first node according to claim 3 , comprising:
the first transmitter, transmitting a fifth radio signal, the fifth radio signal comprising the third message;
wherein a transmission of the fifth radio signal is later than a reception of the fourth radio signal.
5. The first node according to claim 1 , wherein the second message comprises a first identifier;
wherein the first identifier uniquely identifies the first node at a serving base station of the first node.
6. The second node according to claim 5 , wherein the third radio signal is triggered by a third message;
wherein the third message comprises at least one of a physical-layer message or a higher-layer message; the value of the Logical Channel Identity of the first message is 43.
7. A second node for wireless communications, comprising:
a second receiver, receiving a first radio signal from a UE before receiving a third radio signal, the first radio signal comprising a first message; receiving the third radio signal from the UE on a first radio resource; and
a second transmitter, transmitting a second message, the second message being used to indicate the first radio resource; and after transmitting the second message, switching to communicate with the UE through a relay node;
wherein a third message is generated; the third radio signal is transmitted as a response of the third message being generated; the first radio signal is received through a Physical Uplink Shared Channel (PUSCH); the first message comprises a MAC Control Element (CE), and a value of a Logical Channel Identity (LCID) of the first message is a positive integer ranging from 35 to 44; the first message is used to trigger the second message, and the first radio resource is used for a contention-free random access.
8. The second node according to claim 7 , comprising:
the second transmitter, transmitting a fourth radio signal, the fourth radio signal comprising a fourth message;
wherein the third radio signal is used to trigger the fourth message; and the fourth message is used for an uplink synchronization.
9. The second node according to claim 8 , comprising:
the second receiver, receiving a fifth radio signal, the fifth radio signal comprises the third message;
wherein a reception of the fifth radio signal is later than a transmission of the fourth radio signal.
10. The second node according to claim 7 , wherein the second message comprises a first identifier;
wherein the first identifier uniquely identifies a transmitter of the third radio signal at the second node.
11. A method in a first node for wireless communications, comprising:
transmitting a first radio signal to a base station before transmitting a third radio signal, the first radio signal comprising a first message;
receiving a second radio signal, the second radio signal comprising a second message, the second message being used to indicate a first radio resource; and
after receiving the second radio signal, switching to communicate with the base station through a relay node; and
generating a third message;
as a response to generating the third message, transmitting the third radio signal to the base station on the first radio resource;
wherein the first radio signal is transmitted through a Physical Uplink Shared Channel (PUSCH); the first message comprises a MAC Control Element (CE), and a value of a Logical Channel Identity (LCID) of the first message is a positive integer ranging from 35 to 44; the first message is used to trigger the second message, and the first radio resource is used for a contention-free random access.
12. The method in a first node according to claim 11 , wherein the third radio signal is triggered by a third message;
wherein the third message comprises at least one of a physical-layer message or a higher-layer message; the value of the Logical Channel Identity of the first message is 43.
13. The method in a first node according to claim 11 , comprising:
receiving a fourth radio signal, the fourth radio signal comprising a fourth message;
wherein the third radio signal is used to trigger the fourth message; and the fourth message is used for an uplink synchronization.
14. The method in a first node according to claim 13 , comprising:
transmitting a fifth radio signal, the fifth radio signal comprising the third message;
wherein a transmission of the fifth radio signal is later than a reception of the fourth radio signal.
15. The method in a first node according to claim 11 , wherein the second message comprises a first identifier;
wherein the first identifier uniquely identifies the first node at a serving base station of the first node.