Data transmission method, device, and system
The present invention provides a data transmission method, a device, and a system, and relates to the field of communications technologies, to resolve a problem that a base station cannot well identify specific remote UE from which data sent by relay UE comes. The method may include: receiving, by relay UE, data of remote UE, where the data includes a first identifier of the remote UE; determining, by the relay UE, a second identifier of the remote UE based on the first identifier; and sending the data of the remote UE and the second identifier of the remote UE to a base station.
1. A data transmission method applied for a relay user equipment (UE), wherein the method comprises:
sending a first message to a base station, wherein the first message comprises a first identifier, the first identifier is a layer 2 address of a remote UE;
receiving a second message from the base station, wherein the second message indicates a mapping relationship between the first identifier and a second identifier, and wherein the second identifier is allocated by the base station;
receiving a third identifier and data from the remote UE, wherein the third identifier matches the first identifier;
determining the second identifier based on the third identifier; and
sending the data and the second identifier of the remote UE to the base station.
2. The method of claim 1 , wherein receiving a third identifier and data from the remote UE, comprises:
receiving the data from the remote UE via at least one second radio bearer.
3. The method of claim 2 , wherein after receiving the data from the remote UE via at least one second radio bearer, the method comprises:
determining a first radio bearer based on an identifier of each second radio bearer of the at least one second radio bearer or a logical channel identifier (LCID) of each second radio bearer of the at least one second radio bearer.
4. The method of claim 3 , wherein sending the data and the second identifier of the remote UE to the base station, comprises:
sending the data and the second identifier of the remote UE to the base station via the first radio bearer.
5. The method of claim 1 , wherein before sending a first message to the base station, the method comprises:
receiving the first identifier from the remote UE.
6. The method of claim 1 , wherein the data comprises a radio resource control (RRC) connection setup request message.
7. The method of claim 1 , wherein the second identifier is a unique identifier of the remote UE on the relay UE, and the second identifier is different than the first identifier.
8. An apparatus, wherein the relay UE apparatus comprises:
at least one processor; and
one or more memories coupled to the at least one processor, wherein the one or more memories store
a computer program code that comprises instructions that, when run on the at least one processor, the at least one processor is enabled to perform steps of:
sending a first message to a base station, wherein the first message comprises a first identifier, the first identifier is a layer 2 address of a remote UE;
receiving a second message from the base station, wherein the second message indicates a mapping relationship between the first identifier and a second identifier, and wherein the second identifier is allocated by the base station;
receiving a third identifier and data from the remote UE, wherein the third identifier matches the first identifier;
determining the second identifier based on the third identifier; and
sending the data and the second identifier of the remote UE to the base station.
9. The apparatus of claim 8 , wherein receiving a third identifier and data from the remote UE, comprises:
receiving the data from the remote UE via at least one second radio bearer.
10. The apparatus of claim 9 , wherein the steps comprise:
after receiving the data from the remote UE via at least one second radio bearer, determining a first radio bearer based on an identifier of each second radio bearer of the at least one second radio bearer or a logical channel identifier (LCID) of each second radio bearer of the at least one second radio bearer.
11. The apparatus of claim 10 , wherein sending the data and the second identifier of the remote UE to the base station, comprises:
sending the data and the second identifier of the remote UE to the base station via the first radio bearer.
12. The apparatus of claim 8 , wherein before sending a first message to the base station, the steps comprise:
receiving the first identifier from the remote UE.
13. The apparatus of claim 8 , wherein the data comprises a radio resource control (RRC) connection setup request message.
14. The apparatus of claim 8 , wherein the second identifier is a unique identifier of the remote UE on the apparatus, and the second identifier is different than the first identifier.
15. An apparatus, wherein the apparatus comprises:
at least one processor; and
one or more memories coupled to the at least one processor, wherein the one or more memories store a computer program code that comprises instructions that, when run on the at least one processor, the at least one processor is enabled to perform steps of:
receiving a first message from a relay user equipment (UE), wherein the first message comprises a first identifier, the first identifier is a layer 2 address of a remote UE;
sending a second message to the relay UE, wherein the second message indicates a mapping relationship between the first identifier and a second identifier, and wherein the second identifier is allocated by the apparatus; and
receiving data and the second identifier of the remote UE from the relay UE, wherein the data is from the remote UE.
16. The apparatus of claim 15 , wherein the second identifier is a unique identifier of the remote UE on the relay UE.
17. A non-transitory computer-readable storage medium having a computer program code stored thereon, wherein the computer program code comprises instructions that, when run on at least one processor of an apparatus, cause the apparatus to perform steps including:
sending a first message to a base station, wherein the first message comprises a first identifier, the first identifier is a layer 2 address of a remote UE;
receiving a second message from the base station, wherein the second message indicates a mapping relationship between the first identifier and a second identifier, and wherein the second identifier is allocated by the base station;
receiving a third identifier and data from the remote UE, wherein the third identifier matches the first identifier;
determining the second identifier based on the third identifier; and
sending the data and the second identifier of the remote UE to the base station.
18. The non-transitory computer-readable storage medium of claim 17 , wherein receiving a third identifier and data from the remote UE, comprises:
receiving the data from the remote UE via at least one second radio bearer.
19. The non-transitory computer-readable storage medium of claim 18 , wherein the steps comprise:
after receiving the data from the remote UE via at least one second radio bearer, determining a first radio bearer based on an identifier of each second radio bearer of the at least one second radio bearer or a logical channel identifier (LCID) of each second radio bearer of the at least one second radio bearer.
20. The non-transitory computer-readable storage medium of claim 19 , wherein sending the data and the second identifier of the remote UE to the base station, comprises:
sending the data and the second identifier of the remote UE to the base station via the first radio bearer.