Method and device for relay transmission
View Patent ↗A method and device for relay transmission are provided. The method includes: a relay terminal device receives a PDU transmitted by a remote terminal device to a network device, where the adaptation layer PDU carries identity information of the remote terminal device, and the adaptation layer PDU is acquired by the remote terminal device by packaging, via a layer 2 adaptation layer, data carried in the adaptation layer PDU; the relay terminal device acquires in the layer 2 adaptation layer the identity information of the remote terminal device carried in the adaptation layer PDU; and the relay terminal device forwards, on the basis of the identity information of the remote terminal device acquired, the data carried in the adaptation layer PDU to the network device.
1. A method of relay transmission, comprising:
performing, by a remote terminal device, encapsulation processing on data to be sent to a network device in an ADPtive (ADP) layer of layer 2 to obtain an ADP-layer Protocol Data Unit (PDU), the ADP-layer PDU containing identifier information of the remote terminal device; and
sending, by the remote terminal device, the ADP-layer PDU to a relay terminal device, wherein, in an user-plane protocol stack corresponding to the first interface, a layer located below the ADP layer corresponds to a Device-to-Device (D2D) communication technology adopted between the relay terminal device and the remote terminal device.
2. The method of claim 1 , wherein the identifier information of the remote terminal device comprises an ADP-layer identifier of the remote terminal device or a terminal device identifier of the remote terminal device.
3. The method of claim 1 , wherein, in the user-plane protocol stack, corresponding to a first interface, of the relay terminal device, layer 2 only comprises a bottom layer and an ADP layer located above the bottom layer; or
in the user-plane protocol stack, corresponding to the first interface, of the relay terminal device, layer 2 comprises the bottom layer, the ADP layer, a Radio Link Control (RLC) layer and a Packet Data Convergence Protocol (PDCP) layer, the ADP layer being located between the RLC layer and the bottom layer,
wherein the first interface is a communication interface between the relay terminal device and the remote terminal device.
4. The method of claim 1 , wherein a header of the ADP-layer PDU contains indication information, and the indication information is configured to indicate that the data contained in the ADP-layer PDU is relay data.
5. The method of claim 1 , wherein the ADP-layer PDU further contains bearer identifier information of a bearer to which the data belongs.
6. The method of claim 1 , wherein the performing, by the remote terminal device, encapsulation processing on the data to be sent to the network device in the ADP layer of the layer 2 to obtain the ADP-layer PDU comprises:
if the ADP layer is located above a bottom layer of the layer 2, performing, by the remote terminal device, encapsulation processing on the data to be sent to the network device through the ADP layer.
7. The method of claim 6 , wherein before performing, by the remote terminal device, encapsulation processing on the data to be sent to the network device through the ADP layer, the method further comprises:
performing, by the remote terminal device, encapsulation processing on the data to be sent to the network device sequentially through a PDCP layer and a RLC layer.
8. A method of relay transmission, comprising:
receiving, by a remote terminal device, an ADPtive (ADP)-layer Protocol Data Unit (PDU) sent by a relay terminal device, the ADP-layer PDU containing identifier information of the remote terminal device;
acquiring, by the remote terminal device, the identifier information, contained in the ADP-layer PDU, of the remote terminal device in an ADP layer of layer 2; and
determining, by the remote terminal device according to the acquired identifier information of the remote terminal device, the remote terminal device corresponding to the ADP-layer PDU, wherein, in an user-plane protocol stack corresponding to the first interface, a layer located below the ADP layer corresponds to a Device-to-Device (D2D) communication technology adopted between the relay terminal device and the remote terminal device.
9. The method of claim 8 , wherein the identifier information of the remote terminal device comprises an ADP-layer identifier of the remote terminal device or a terminal device identifier of the remote terminal device.
10. The method of claim 8 , wherein, in the user-plane protocol stack, corresponding to a first interface, of the relay terminal device, layer 2 only comprises a bottom layer and an ADP layer located above the bottom layer; or
in the user-plane protocol stack, corresponding to the first interface, of the relay terminal device, layer 2 comprises the bottom layer, the ADP layer, a Radio Link Control (RLC) layer and a Packet Data Convergence Protocol (PDCP) layer, the ADP layer being located between the RLC layer and the bottom layer,
wherein the first interface is a communication interface between the relay terminal device and the remote terminal device.
11. A device of relay transmission, comprising:
a processor, configured to perform encapsulation processing on data to be sent to a network device in an ADPtive (ADP) layer of layer 2 to obtain an ADP-layer Protocol Data Unit (PDU), the ADP-layer PDU containing identifier information of the device; and
a sender, configured to send the ADP-layer PDU generated by the processor to a relay terminal device, wherein, in an user-plane protocol stack corresponding to the first interface, a layer located below the ADP layer corresponds to a Device-to-Device (D2D) communication technology adopted between the relay terminal device and the remote terminal device.
12. The device of claim 11 , wherein the identifier information of the device comprises an ADP-layer identifier of the remote terminal device or a terminal device identifier of the device.
13. The device of claim 11 , wherein, in the user-plane protocol stack, corresponding to a first interface, of the relay terminal device, layer 2 only comprises a bottom layer and an ADP layer located above the bottom layer; or
in the user-plane protocol stack, corresponding to the first interface, of the relay terminal device, layer 2 comprises the bottom layer, the ADP layer, a Radio Link Control (RLC) layer and a Packet Data Convergence Protocol (PDCP) layer, the ADP layer being located between the RLC layer and the bottom layer,
wherein the first interface is a communication interface between the relay terminal device and the device.
14. The device of claim 11 , wherein a header of the ADP-layer PDU contains indication information, and the indication information is configured to indicate that the data contained in the ADP-layer PDU is relay data.
15. The device of claim 11 , wherein the ADP-layer PDU further contains bearer identifier information of a bearer to which the data belongs.
16. The device of claim 11 , wherein the processor is specifically configured to:
if the ADP layer is located above a bottom layer of the layer 2, perform encapsulation processing on the data to be sent to the network device through the ADP layer.
17. The device of claim 16 , wherein the processor is further configured to perform encapsulation processing on the data to be sent to the network device sequentially through a PDCP layer and a RLC layer, before performing encapsulation processing on the data to be sent to the network device through the ADP layer.