Random access processing method and related device
Embodiments of this application provide a random access processing method. A random access preamble and uplink data are sent in an initiation phase of a random access procedure, and the random access procedure is ended in time after feedback information for the uplink data is received. According to technical solutions provided in the embodiments of this application, a terminal side device may send the uplink data when sending the random access preamble in the random access procedure. In addition, the random access procedure can be ended in advance after the feedback information for the uplink data is received.
1. A random access processing method in a random access procedure, performed by a terminal side device, the method comprising:
receiving from a network side device, configuration information indicating a random access resource and a time offset between the random access resource and a resource of uplink data;
determining the resource of the uplink data based on the random access resource and the time offset;
sending, to the network side device, a random access preamble on the random access resource, and the uplink data on the resource of the uplink data; and
receiving, from the network side device, a random access response comprising feedback information for the uplink data;
the random access response being a downlink medium access control (MAC) protocol data unit (PDU), the downlink MAC PDU comprising the feedback information and a MAC subheader, and the MAC subheader comprising an indication field; and
in accordance with a bit state of the indication field indicating an extension field exists, the extension field indicates a MAC sub-PDU in which the feedback information is located.
2. The method according to claim 1 , wherein the uplink data is an uplink radio resource control (RRC) message and the feedback information for the uplink data comprises a downlink RRC message corresponding to the uplink RRC message.
3. The method according to claim 1 , wherein the feedback information for the uplink data comprises a MAC layer control element used to determine contention resolution success, and the method further comprises:
stopping a timer for receiving the random access response and ending the random access procedure in response to the terminal side device having received the feedback information for the uplink data.
4. The method according to claim 3 , wherein the configuration information further indicates a duration of the timer for receiving the random access response.
5. The method according to claim 1 , wherein the method further comprises:
determining a correspondence that a plurality of random access preambles correspond to one resource of the uplink data.
6. An apparatus, comprising: a non-transitory memory comprising instructions; and a processor coupled with the non-transitory memory, wherein the instructions are executed by the processor to cause the apparatus to: receive, from a network side device, configuration information for a random access procedure, wherein the configuration information indicates a random access resource and a time offset between the random access resource and a resource of uplink data; determine the resource of the uplink data based on the random access resource and the time offset; send, to the network side device, a random access preamble on the random access resource, and the uplink data on the resource of the uplink data; and receive, from the network side device, a random access response comprising feedback information for the uplink data; wherein the random access response is a downlink medium access control (MAC) protocol data unit (PDU), the downlink MAC PDU comprises the feedback information and a MAC subheader, and the MAC subheader comprise an indication field; and in accordance with a bit state of the indication field indicating an extension field exists, the extension field indicates a MAC sub-PDU in which the feedback information is located.
7. The apparatus according to claim 6 , wherein the uplink data is an uplink radio resource control (RRC) message and the feedback information for the uplink data comprises a downlink RRC message corresponding to the uplink RRC message.
8. The apparatus according to claim 6 , wherein the feedback information for the uplink data comprises a MAC layer control element used to determine contention resolution success, and the instructions are executed by the processor to further cause the apparatus to:
stop a timer for receiving the random access response and end the random access procedure in response to the apparatus having received the feedback information for the uplink data.
9. The apparatus according to claim 8 , wherein the configuration information further indicates a duration of the timer for receiving the random access response.
10. The apparatus according to claim 6 , wherein the instructions are executed by the processor to further cause the apparatus to:
determine a correspondence that a plurality of random access preambles corresponds to one resource of the uplink data.
11. An apparatus, comprising: a non-transitory memory comprising instructions; and a processor coupled with the non-transitory memory, wherein the instructions are executed by the processor to cause the apparatus to: send, to a terminal side device, configuration information for a random access procedure, wherein the configuration information indicates a random access resource and a time offset between the random access resource and a resource of uplink data; receive, from the terminal side device, a random access preamble on the random access resource and the uplink data on the resource of the uplink data; and send, to the terminal side device, a random access response comprising feedback information for the uplink data; wherein the random access response is a downlink medium access control (MAC) protocol data unit (PDU), the downlink MAC PDU comprises the feedback information and a MAC subheader, and the MAC subheader comprise an indication field; and in accordance with a bit state of the indication field indicating an extension field exists, the extension field indicates a MAC sub-PDU in which the feedback information is located.
12. The apparatus according to claim 11 , wherein the uplink data is an uplink radio resource control (RRC) message and the feedback information for the uplink data comprises a downlink RRC message corresponding to the uplink RRC message.
13. The apparatus according to claim 11 , wherein the configuration information further indicates a duration of a timer for the terminal side device receiving the random access response.
14. The apparatus according to claim 11 , wherein the feedback information for the uplink data comprises a MAC layer control element used to determine contention resolution success.
15. A random access processing method in a random access procedure, performed by a network side device, the method comprising:
sending, to a terminal side device, configuration information for the random access procedure, wherein the configuration information indicates a random access resource and a time offset between the random access resource and a resource of uplink data;
receiving, from the terminal side device, a random access preamble on the random access resource and the uplink data on the resource of the uplink data; and
sending, to the terminal side device, a random access response comprising feedback information for the uplink data;
the random access response being a downlink medium access control (MAC) protocol data unit (PDU), the downlink MAC PDU comprising the feedback information and a MAC subheader, and the MAC subheader comprising an indication field; and
in accordance with a bit state of the indication field indicating an extension field exists, the extension field indicates a MAC sub-PDU in which the feedback information is located.
16. The method according to claim 15 , wherein the uplink data is an uplink radio resource control (RRC) message and the feedback information for the uplink data comprises a downlink RRC message corresponding to the uplink RRC message.
17. The method according to claim 15 , wherein the configuration information further indicates a duration of a timer for the terminal side device receiving the random access response.
18. The method according to claim 15 , wherein the feedback information for the uplink data comprises a MAC layer control element used to determine contention resolution success.