Random access method, device, and medium
A random access method, a device, and a medium. The random access method includes: receiving configuration information, the configuration information being used to instruct to enable a back-off function of a random access process; and switching from a two-step random access to a four-step random access by a back-off in response to a synchronization signal and PBCH block (SSB) based random access meeting a target condition.
1. A random access method, comprising:
receiving configuration information, wherein the configuration information is configured to indicate to enable a back-off function of a random access process; and
switching from a two-step random access to a four-step random access by a back-off in response to a synchronization signal and PBCH block (SSB) based random access meeting a target condition;
receiving another configuration information, wherein the another configuration information is configured to configure a disable indication, wherein the disable indication is configured to indicate to disable the back-off function of the random access process;
sending a message A of the two-step random access in response to measuring an SSB; and
initiating the two-step random access again after adjusting a downlink beam or transmitting power based on an adjusted priority in response to not receiving a message B of the two-step random access;
wherein the adjusted priority includes a first adjusted priority of the downlink beam being higher than a second adjusted priority of the transmitting power;
wherein initiating the two-step random access again after adjusting the downlink beam or transmitting power based on the adjusted priority in response to not receiving the message B of the two-step random access comprises:
changing the downlink beam to a new downlink beam with a signal quality inferior to that of the downlink beam and initiating the two-step random access again according to a first random access resource determined based on the new downlink beam; and
in response to the two-step random access initiated again failing, determining a second random access resource based on the downlink beam and increasing the transmitting power to a new transmitting power, and initiating the two-step random access again according to the second random access resource and the new transmitting power.
2. The method of claim 1 , wherein switching from the two-step random access to the four-step random access by the back-off in response to the SSB based random access meeting the target condition comprises:
switching from the two-step random access to the four-step random access by the back-off in response to detecting that no SSB has a signal quality reaching a measurement threshold.
3. The method of claim 2 , wherein the configuration information is configured to configure the measurement threshold, which configured to indicate to enable the back-off function of the random access process.
4. The method of claim 2 , wherein the configuration information is configured to configure the measurement threshold and an enable indication, and the enable indication is configured to indicate to enable the back-off function of the random access process.
5. The method of claim 1 , wherein switching from the two-step random access to the four-step random access by the back-off in response to the SSB based random access meeting the target condition comprises:
sending a message A of the two-step random access in response to measuring an SSB; and
initiating the four-step random access in response to not receiving a message B of the two-step random access, or initiating the four-step random access in response to receiving scheduling information indicating a failure of the message A.
6. The method of claim 5 , wherein the configuration information is configured to configure an enable indication, which configured to indicate to enable the back-off function of the random access process.
7. A random access method, comprising:
sending configuration information, wherein the configuration information is configured to indicate to enable a back-off function of a random access process; and
sending a synchronization signal and PBCH block (SSB), wherein the SSB is configured to trigger a UE to switch from a two-step random access to a four-step random access by a back-off in response to a SSB based random access meeting a target condition; and
sending another configuration information, wherein the another configuration information is configured to configure a disable indication, wherein the disable indication is configured to indicate to disable the back-off function of the random access process, and the another configuration information is configured to trigger the UE to adjust a downlink beam or transmitting power based on an adjusted priority in response to not receiving a message B of the two-step random access and to initiate the two-step random access again; wherein the adjusted priority includes a first adjusted priority of the downlink beam being higher than a second adjusted priority of the transmitting power;
wherein the UE is triggered to adjust a downlink beam or transmitting power based on an adjusted priority in response to not receiving a message B of the two-step random access and to initiate the two-step random access again by:
changing the downlink beam to a new downlink beam with a signal quality inferior to that of the downlink beam and initiating the two-step random access again according to a first random access resource determined based on the new downlink beam; and
in response to the two-step random access initiated again failing, determining a second random access resource based on the downlink beam and increasing the transmitting power to a new transmitting power, and initiating the two-step random access again according to the second random access resource and the new transmitting power.
8. The method of claim 7 , wherein the configuration information is configured to configure a measurement threshold, which configured to indicate to enable the back-off function of the random access process.
9. The method of claim 7 , wherein the configuration information is configured to configure a measurement threshold and an enable indication, and the enable indication is configured to indicate to enable the back-off function of the random access process.
10. The method of claim 7 , wherein the configuration information is configured to configure an enable indication, and the enable indication is configured to indicate to enable the back-off function of the random access process.
11. A terminal, comprising:
a processor;
a memory storing executable instructions thereon; wherein,
the processor is configured to load and execute the executable instructions to perform a random access method comprising:
receiving configuration information, wherein the configuration information is configured to indicate to enable a back-off function of a random access process; and
switching from a two-step random access to a four-step random access by a back-off in response to a synchronization signal and PBCH block (SSB) based random access meeting a target condition;
receiving another configuration information, wherein the another configuration information is configured to configure a disable indication, wherein the disable indication is configured to indicate to disable the back-off function of the random access process;
sending a message A of the two-step random access in response to measuring an SSB; and
initiating the two-step random access again after adjusting a downlink beam or transmitting power based on an adjusted priority in response to not receiving a message B of the two-step random access;
wherein the adjusted priority includes a first adjusted priority of the downlink beam being higher than a second adjusted priority of the transmitting power;
wherein initiating the two-step random access again after adjusting the downlink beam or transmitting power based on the adjusted priority in response to not receiving the message B of the two-step random access comprises:
changing the downlink beam to a new downlink beam with a signal quality inferior to that of the downlink beam and initiating the two-step random access again according to a first random access resource determined based on the new downlink beam; and
in response to the two-step random access initiated again failing, determining a second random access resource based on the downlink beam and increasing the transmitting power to a new transmitting power, and initiating the two-step random access again according to the second random access resource and the new transmitting power.
12. The terminal of claim 11 , wherein switching from the two-step random access to the four-step random access by the back-off in response to the SSB based random access meeting the target condition comprises:
switching from the two-step random access to the four-step random access by the back-off in response to detecting that no SSB has a signal quality reaching a measurement threshold.
13. The terminal of claim 12 , wherein the configuration information is configured to configure the measurement threshold, and the measurement threshold is configured to implicitly indicate to enable the back-off function of the random access process.
14. The terminal of claim 12 , wherein the configuration information is configured to configure the measurement threshold and an enable indication, and the enable indication is configured to indicate to enable the back-off function of the random access process.
15. The terminal of claim 11 , wherein switching from the two-step random access to the four-step random access by the back-off in response to the SSB based random access meeting the target condition comprises:
sending a message A of the two-step random access in response to measuring an SSB; and
initiating the four-step random access in response to not receiving a message B of the two-step random access, or initiating the four-step random access in response to receiving scheduling information indicating a failure of the message A.
16. The terminal of claim 15 , wherein the configuration information is configured to configure an enable indication, and the enable indication is configured to indicate to enable the back-off function of the random access process.
17. An access network device, comprising:
a processor;
a memory storing executable instructions thereon; wherein,
the processor is configured to perform the random access method according to claim 7 .