Resource allocation method, base station, and terminal

Patent metadata

Field	Value
Publication number	US-12063696-B2
Application number	US-202117520985-A
Country	US
Kind code	B2
Filing date	Nov 8, 2021
Priority date	May 9, 2019
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

Embodiments of this application disclose a resource allocation method, a base station, and a terminal. The method includes: A base station sends a configuration message to a terminal, where the configuration message is used to configure, for the terminal, a random access channel RACH resource used in a channel occupancy time COT. The base station receives a random access request that is sent by the terminal based on the RACH resource allocated by using the configuration message. According to embodiments of this application, a random access latency of the terminal can be reduced.

First claim

What is claimed is:

1. A communications apparatus for resource allocation, comprising:
a transceiver,
a processor, and
a memory, wherein the processor is configured to control the transceiver to:
send a configuration message to a terminal, wherein the configuration message is used to configure, for the terminal, a random access channel (RACH) resource used in a channel occupancy time (COT) and the configuration message comprises time domain position information of the RACH resource and a discovery reference signal (DRS), the time domain position information comprising:
a quantity of times that the RACH resource appears and/or an interval at which the RACH resource appears, and
a mapping relationship between a synchronization signal/PBCH block (SSB) in the DRS and the RACH resource; and

receive a random access request sent by the terminal based on the RACH resource allocated by using the configuration message.

2. The communications apparatus according to claim 1 , wherein the configuration message comprises downlink control information (DCI), and wherein the time domain position information comprises:
information about a relative position of the RACH resource and the DCI.

3. The communications apparatus according to claim 2 , wherein the time domain position information further comprises:
a quantity of times that the RACH resource appears in the COT or a repetition periodicity of the RACH resource appearing in the COT.

4. The communications apparatus according to claim 1 , wherein the time domain position information comprises:
information about a relative position of the RACH resource and the DRS.

5. A communications apparatus, comprising:
a transceiver,
a processor, and
a memory, wherein the processor is configured to control the transceiver to:
receive a configuration message sent by a base station, wherein the configuration message is used to configure, for a terminal, a random access channel (RACH) resource used in a channel occupancy time (COT) and the configuration message comprises time domain position information of the RACH resource, wherein the time domain position information comprises a quantity of times that the RACH resource appears in the COT or a repetition periodicity of the RACH resource appearing in the COT; and
send a random access request to the base station based on the RACH resource allocated by using the configuration message.

6. The communications apparatus according to claim 5 , wherein the configuration message is comprises downlink control information (DCI), and wherein the time domain position information comprises:
information about a relative position of the RACH resource and the DCI.

7. The communications apparatus according to claim 5 , wherein the configuration message comprises a discovery reference signal (DRS), and wherein the time domain position information comprises:
information about a relative position of the RACH resource and the DRS.

8. The communications apparatus according to claim 7 , wherein the time domain position information further comprises:
a quantity of times that the RACH resource appears and/or an interval at which the RACH resource appears, and
a mapping relationship between a synchronization signal/PBCH block (SSB) in the DRS and the RACH resource.

9. A resource allocation method, comprising:
receiving, by a terminal, a configuration message sent by a base station, wherein the configuration message is used to configure, for the terminal, a random access channel (RACH) resource used in a channel occupancy time (COT) and the configuration message includes time domain position information of the RACH resource, the time domain position information including a quantity of times that the RACH resource appears in the COT or a repetition periodicity of the RACH resource appearing in the COT; and
sending, by the terminal, a random access request to the base station based on the RACH resource allocated by using the configuration message.

10. The method according to claim 9 , wherein the configuration message comprises downlink control information DCI, and wherein the time domain position information comprises:
information about a relative position of the RACH resource and the DCI.

11. The method according to claim 9 , wherein the configuration message comprises a discovery reference signal (DRS), and wherein the time domain position information comprises:
information about a relative position of the RACH resource and the DRS.

12. The method according to claim 11 , wherein the time domain position information further comprises:
a quantity of times that the RACH resource appears and/or an interval at which the RACH resource appears, and
a mapping relationship between a synchronization signal/PBCH block SSB in the DRS and the RACH resource.

Assignees

• Huawei Tech Co Ltd

Inventors

• Wu Ji
• Zhang Jiayin
• Liu Jianqin

Classifications

• H04W74/0833 Primary

  Random access procedures, e.g. with 4-step access · CPC title

• H04W74/0866

  using a dedicated channel for access · CPC title

• H04W74/006 Primary

  in the downlink, i.e. towards the terminal · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W56/001

  Synchronization between nodes · CPC title