Random access method, terminal and network device
The present disclosure provides a random access method, a terminal and a network device. The random access method, performed by a terminal, includes: obtaining configuration information of a target random access; determining a first physical uplink shared channel (PUSCH) resource for transmitting a message 1, according to the configuration information; on the first PUSCH resource, transmitting the message 1 of the target random access.
1 . A random access method, performed by a terminal, comprising:
obtaining configuration information of a target random access, wherein the target random access is a two-step contention random access, and the configuration information comprises: association relationship between reference signals and PUSCH resources; wherein the reference signals comprise at least one synchronization signal block (SSB);
determining a first physical uplink shared channel (PUSCH) resource for transmitting data in a message 1 of the two-step contention random access, according to the association relationship between reference signals and PUSCH resources in the configuration information;
on the first PUSCH resource, transmitting data in the message 1 of the two-step contention random access;
wherein the determining a first physical uplink shared channel (PUSCH) resource for transmitting a message 1 of the two-step contention random access, according to the association relationship between reference signals and PUSCH resources in the configuration information, comprises:
determining a first reference signal;
determining one PUSCH resource from PUSCH resources associated with the first reference signal, as the first PUSCH resource for transmitting the message 1;
wherein the determining a first reference signal, comprises:
when there is a reference signal with a performance indicator being greater than or equal to a preset threshold value, determining one reference signal from at least one reference signal with the performance indicator being greater than or equal to the preset threshold value, as the first reference signal; or,
when there is no reference signal with a performance indicator being greater than or equal to the preset threshold value, determining one reference signal from reference signals configured by a network device for the terminal, as the first reference signal;
wherein the determining one reference signal from at least one reference signal with the performance indicator being greater than or equal to the preset threshold value, as the first reference signal, comprises:
when there are at least two reference signals with performance indicators being greater than or equal to the preset threshold value, determining one of the at least two reference signals with performance indicators being greater than or equal to the preset threshold value, as the first reference signal;
wherein the first reference signal is one randomly selected from the at least two reference signals; or, the first reference signal is one, which meets a first preset condition, from the at least two reference signals.
2 . The random access method according to claim 1 , wherein the configuration information further comprises at least one of the following information:
at least one reference signal monitored by the terminal;
a performance indicator according to which the terminal selects a first reference signal from the at least one reference signal;
a preset threshold value for a performance indicator, according to which the terminal selects a first reference signal from the at least one reference signal.
3 . The random access method according to claim 2 , wherein the at least one reference signal comprises at least one synchronization signal block (SSB) and/or at least one channel state information reference signal (CSI-RS).
4 . The random access method according to claim 2 , wherein the performance indicator comprises one of the following information:
reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), and signal-to-noise ratio (SINR).
5 . The random access method according to claim 1 , wherein the association relationship comprises at least one of the following information:
there is a one-to-one relationship between the reference signals and the PUSCH resources;
one PUSCH resource corresponds to at least one reference signal;
one reference signal corresponds to at least one PUSCH resource.
6 . The random access method according to claim 1 , wherein the PUSCH resource comprises: a grant-free resource and/or a pre-configured resource for the target random access.
7 . The random access method according to claim 1 , wherein the obtaining configuration information of a target random access, comprises at least one of the following ways:
receiving the configuration information of the target random access transmitted by a network device through a system broadcast message;
receiving the configuration information of the target random access transmitted by the network device through a radio resource control (RRC) release message.
8 . The random access method according to claim 1 , wherein the determining one reference signal from reference signals configured by a network device for the terminal, as the first reference signal, comprises:
randomly selecting one of the reference signals configured by the network device for the terminal, as the first reference signal; or,
selecting one, which meets a first preset condition, from the reference signals configured by the network device for the terminal, as the first reference signal.
9 . The random access method according to claim 1 , wherein the first preset condition comprises at least one of the following conditions:
time domain is less than or equal to a first preset threshold value;
frequency domain is less than or equal to a second preset threshold value.
10 . The random access method according to claim 1 , wherein the determining one PUSCH resource from PUSCH resources associated with the first reference signal, as the first PUSCH resource for transmitting the message 1, comprises:
when the first reference signal is associated with one PUSCH resource, determining the PUSCH resource corresponding to the first reference signal as the first PUSCH resource; or,
when the first reference signal is associated with at least two PUSCH resources, selecting a target PUSCH resource from the at least two PUSCH resources associated with the first reference signal, as the first PUSCH resource.
11 . The random access method according to claim 10 , wherein the target PUSCH resource is a random one of the at least two PUSCH resources associated with the first reference signal, or, the target PUSCH resource is one PUSCH resource, which meets a second preset condition, of the at least two PUSCH resources associated with the first reference signal.
12 . A terminal, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor; wherein the computer program is executed by the processor to implement steps of:
obtaining configuration information of a target random access, wherein the target random access is a two-step contention random access, and the configuration information comprises: association relationship between reference signals and PUSCH resources; wherein the reference signals comprise at least one synchronization signal block (SSB);
determining a first physical uplink shared channel (PUSCH) resource for transmitting data in a message 1 of the two-step contention random access, according to the association relationship between reference signals and PUSCH resources in the configuration information;
on the first PUSCH resource, transmitting data in the message 1 of the two-step contention random access;
wherein when determining a first physical uplink shared channel (PUSCH) resource for transmitting a message 1 of the two-step contention random access, according to the association relationship between reference signals and PUSCH resources in the configuration information, the computer program is executed by the processor to implement:
determining a first reference signal;
determining one PUSCH resource from PUSCH resources associated with the first reference signal, as the first PUSCH resource for transmitting the message 1;
wherein when determining a first reference signal, the computer program is executed by the processor to implement:
when there is a reference signal with a performance indicator being greater than or equal to a preset threshold value, determining one reference signal from at least one reference signal with the performance indicator being greater than or equal to the preset threshold value, as the first reference signal; or,
when there is no reference signal with a performance indicator being greater than or equal to the preset threshold value, determining one reference signal from reference signals configured by a network device for the terminal, as the first reference signal;
wherein when determining one reference signal from at least one reference signal with the performance indicator being greater than or equal to the preset threshold value, as the first reference signal, the computer program is executed by the processor to implement:
when there are at least two reference signals with performance indicators being greater than or equal to the preset threshold value, determining one of the at least two reference signals with performance indicators being greater than or equal to the preset threshold value, as the first reference signal;
wherein the first reference signal is one randomly selected from the at least two reference signals; or, the first reference signal is one, which meets a first preset condition, from the at least two reference signals.
13 . The terminal according to claim 12 , wherein the configuration information further comprises at least one of the following information:
at least one reference signal monitored by the terminal;
a performance indicator according to which the terminal selects a first reference signal from the at least one reference signal;
a preset threshold value for a performance indicator, according to which the terminal selects a first reference signal from the at least one reference signal.
14 . The terminal according to claim 12 , wherein the association relationship comprises at least one of the following information:
there is a one-to-one relationship between the reference signals and the PUSCH resources;
one PUSCH resource corresponds to at least one reference signal;
one reference signal corresponds to at least one PUSCH resource.
15 . A random access method, performed by a terminal, comprising:
obtaining configuration information of a target random access, wherein the target random access is a two-step contention random access, and the configuration information comprises: association relationship between reference signals and PUSCH resources; wherein the reference signals comprise at least one synchronization signal block (SSB);
determining a first physical uplink shared channel (PUSCH) resource for transmitting data in a message 1 of the two-step contention random access, according to the association relationship between reference signals and PUSCH resources in the configuration information;
on the first PUSCH resource, transmitting data in the message 1 of the two-step contention random access;
wherein the determining a first physical uplink shared channel (PUSCH) resource for transmitting a message 1 of the two-step contention random access, according to the association relationship between reference signals and PUSCH resources in the configuration information, comprises:
determining a first reference signal;
determining one PUSCH resource from PUSCH resources associated with the first reference signal, as the first PUSCH resource for transmitting the message 1;
wherein the determining one PUSCH resource from PUSCH resources associated with the first reference signal, as the first PUSCH resource for transmitting the message 1, comprises:
when the first reference signal is associated with one PUSCH resource, determining the PUSCH resource corresponding to the first reference signal as the first PUSCH resource; or,
when the first reference signal is associated with at least two PUSCH resources, selecting a target PUSCH resource from the at least two PUSCH resources associated with the first reference signal, as the first PUSCH resource;
wherein the target PUSCH resource is a random one of the at least two PUSCH resources associated with the first reference signal, or, the target PUSCH resource is one PUSCH resource, which meets a second preset condition, of the at least two PUSCH resources associated with the first reference signal;
wherein the second preset condition comprises: time domain is less than or equal to a third preset threshold value.