Data transmission method, user equipment, and base station
A data sending method is provided. The method includes: allocating, by a Media Access Control (MAC) entity of a first network node, data packets to at least one hybrid automatic repeat request HARQ unit of at least two cells, where the at least two cells use different radio access technologies RATs, the at least two cells share one HARQ unit or each of the at least two cells is corresponding to one HARQ unit, and the HARQ unit is a HARQ entity and/or a HARQ process; and sending, by the first network node, the data packets to a second network node by using the at least two cells. According to the foregoing solution, the data packets are allocated to the at least one HARQ unit of the at least two cells by using a shared MAC layer, so as to effectively reduce an end-to-end delay.
1. A method performed by an access network device, the method comprising:
sending a message to a terminal device,
wherein the access network device comprises a processor that maintains a single media access control (MAC) entity in a MAC layer and at least two hybrid automatic repeat request (HARQ) entities,
wherein the MAC entity is shared by at least two cells,
wherein each of the at least two HARQ entities corresponds to one of the at least two cells,
wherein the message comprises configuration information of HARQ round trip time (RTT) timing length of the at least two cells and configuration information of discontinuous reception (DRX) of the at least two cells, and
wherein the at least two cells use different transmission time intervals (TTI) and/or different cyclic prefixes (CP);
allocating, by using the single MAC entity data packets to the at least two HARQ entities corresponding to the at least two cells, and
transmitting the data packets to the terminal device by using the at least two cells.
2. The method according to claim 1 , wherein the method further comprises:
receiving a scheduling request (SR) from the terminal device, wherein the SR comprises information about logical channels, or logical channel groups corresponding to the at least two cells RATS.
3. The method according to claim 1 , wherein the configuration information of DRX comprises a type of a physical channel that needs to be listened on by the terminal device and/or information about HARQ RTT timing time of the at least two cells corresponding to the configuration information of DRX.
4. The method according to claim 1 , wherein the message further comprises a semi-persistent scheduling (SPS) configuration for each of the at least two cells.
5. The method according to claim 1 , wherein
the data packets are different data packets of a same service;
the data packets are same data packets of a same service; or
the data packets are data packets of different services.
6. The method according to claim 1 , wherein
the processor further maintains a packet data convergence protocol (PDCP) entity and/or a radio link control (RLC) entity; and
before allocating the data packets, the method further comprises:
processing, by using the PDCP entity and/or the RLC entity, application layer data packets to obtain the data packets.
7. The method according to claim 1 , wherein allocating the data packets to the at least two HARQ entities corresponding to the at least two cells comprises:
allocating, by the MAC entity, the data packets to the at least two HARQ entities corresponding to the at least two cells according to at least one of:
a quality of service parameter of a service,
radio channel statuses of the at least two cells,
an average packet loss rate of each of the at least two cells, or
average channel utilization of each of the at least two cells.
8. An access network device comprising:
a processor;
a memory storing executable instructions;
wherein the processor is configured to execute the executable instructions to perform operations of:
maintaining a single media access control (MAC) entity at a MAC layer and at least two hybrid automatic repeat request (HARQ) entities, wherein the MAC entity is shared by at least two cells, and each of the at least two HARQ entities corresponds to one of the at least two cells;
sending a message to a terminal device, wherein the message comprises configuration information of HARQ round trip time (RTT) timing length of the at least two cells and configuration information of discontinuous reception (DRX) of the at least two cells, wherein the at least two cells use different transmission time intervals (TTI) and/or different cyclic prefixes (CP);
allocating, using the single MAC entity, data packets to the at least two HARQ entities corresponding to the at least two cells; and
transmitting the data packets to the terminal device by using the at least two cells.
9. The access network device according to claim 8 , wherein the processor is further configured to perform an operation of:
receiving a scheduling request (SR), wherein the SR comprises information about logical channels, or logical channel groups corresponding to the at least two cells RATS.
10. The apparatus according to claim 8 , wherein the configuration information of DRX comprises a type of a physical channel that needs to be listened on by the terminal device and/or information about HARQ RTT timing time of the at least two cells corresponding to the configuration information of DRX.
11. The access network device according to claim 8 , wherein the message further comprises a semi-persistent scheduling (SPS) configuration for each of the at least two cells.
12. The access network device according to claim 8 , wherein
the data packets are different data packets of a same service;
the data packets are same data packets of a same service; or
the data packets are data packets of different services.
13. The access network device according to claim 8 , wherein
the processor is further configured to perform operations of:
maintaining a packet data convergence protocol (PDCP) entity and/or a radio link control (RLC) entity;
processing, using the PDCP entity and/or the RLC entity, application layer data packets to obtain the data packets.
14. The access network device according to claim 9 , wherein
the data packets are allocated to the at least two HARQ entities corresponding to the at least two cells according to at least one of:
a quality of service parameter of a service,
radio channel statuses of the at least two cells,
an average packet loss rate of each of the at least two cells, or average channel utilization of each of the at least two cells.
15. A non-transitory computer-readable storage medium comprising instructions which, when executed by a processor, cause the processor to carry out operations including:
sending a message to a terminal device, wherein the message comprises configuration information of hybrid automatic repeat request (HARQ) round trip time (RTT) timing length of at least two cells and configuration information of discontinuous reception (DRX) of the at least two cells, and the at least two cells use different transmission time intervals (TTI) and/or different cyclic prefixes (CP);
operating, in a media access control (MAC) layer, a single MAC entity to allocate data packets to at least two HARQ entities corresponding to the at least two cells, wherein the single MAC entity being shared by the at least two cells using different transmission time intervals (TTI) and/or different cyclic prefixes (CP), and each of the at least two HARQ entities corresponds to one of the at least two cells; and
transmitting the data packets to the terminal device by using the at least two cells.
16. The non-transitory computer-readable storage medium according to claim 15 , wherein the instructions further cause the processor to carry out operations including:
receiving a scheduling request (SR) from the terminal device, wherein the SR comprises information about logical channels, or logical channel groups corresponding to the at least two cells.
17. The non-transitory computer-readable storage medium according to claim 15 , wherein the configuration information of DRX comprises a type of a physical channel that needs to be listened on by the terminal device and/or information about HARQ RTT timing time of the at least two cells corresponding to the configuration information of DRX.
18. The non-transitory computer-readable storage medium according to claim 15 , wherein the message further comprises a semi-persistent scheduling (SPS) configuration for each of the at least two cells.