Transmission resource obtaining method and user equipment

Patent metadata

Field	Value
Publication number	US-10701733-B2
Application number	US-201816045703-A
Country	US
Kind code	B2
Filing date	Jul 25, 2018
Priority date	Jan 27, 2016
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A transmission resource obtaining method and user equipment are provided. The transmission resource obtaining method includes: receiving first configuration information sent by an base station, and obtaining request resources based on the first configuration information, where the request resources include a scheduling request (SR) resource and a physical random access channel (PRACH) resource; determining a target request resource from the request resources based on time information of user equipment, where the target request resource includes the SR resource and/or the PRACH resource; and sending an uplink resource request to the base station by using the target request resource. The technical solutions in the embodiments of the present invention help improve uplink transmission resource obtaining efficiency.

First claim

What is claimed is:

1. A transmission resource obtaining method, comprising:
receiving first configuration information from a base station, and obtaining request resources based on the first configuration information, wherein the request resources comprise a scheduling request (SR) resource and a physical random access channel (PRACH) resource;
determining a target request resource from the request resources based on time information of user equipment, wherein the target request resource comprises one or more of the SR resource and the PRACH resource; and
sending an uplink resource request to the base station by using the target request resource.

2. The method according to claim 1 , wherein the obtaining request resources based on the first configuration information comprises:
if learning, based on the first configuration information, that the request resources belong to a first-type cell, obtaining the request resources from the first-type cell; or
if learning, based on the first configuration information, that the PRACH resource belongs to the first-type cell and the SR resource belongs to a second-type cell, obtaining the request resources from the first-type cell and the second-type cell respectively, wherein
the first-type cell comprises a cell in which a clear channel assessment (CCA) detection needs to be performed before data to be transmitted is sent, and the second-type cell comprises a cell in which a CCA detection does not need to be performed before the to-be-transmitted data is sent.

3. The method according to claim 2 , wherein the determining a target request resource from the request resources based on time information of user equipment comprises:
if the SR resource in the request resources is obtained from the second-type cell, determining a priority of the to-be-transmitted data of the user equipment based on second configuration information received from the base station; and
if the to-be-transmitted data of the user equipment comprises only first-priority data, determining, from the request resources based on the time information of the user equipment, that the target request resource is the SR resource; or if the to-be-transmitted data of the user equipment comprises second-priority data, determining the target request resource from the request resources according to a time precedence principle and based on the time information of the user equipment.

4. The method according to claim 2 , wherein the determining a target request resource from the request resources based on time information of user equipment comprises:
if the request resources are obtained from the first-type cell, determining the target request resource from the request resources according to a time precedence principle and based on the time information of the user equipment.

5. The method according to claim 3 , wherein the determining a target request resource from the request resources based on time information of user equipment comprises:
if the SR resource is selected from the request resources according to the time precedence principle and based on the time information of the user equipment, using the SR resource as the target request resource; or
if the PRACH resource is selected from the request resources according to the time precedence principle and based on the time information of the user equipment, using the PRACH resource as the target request resource; or if both the SR resource and the PRACH resource are selected from the request resources according to the time precedence principle and based on the time information of the user equipment, determining the target request resource from the request resources based on third configuration information, wherein the third configuration information comprises configuration information indicating that the SR resource takes precedence, configuration information indicating that the PRACH resource takes precedence, configuration information indicating that the SR resource and the PRACH resource take precedence, or configuration information indicating that a request resource in the second-type cell takes precedence.

6. The method according to claim 1 , wherein the sending an uplink resource request to the base station by using the target request resource comprises:
if the target request resource is the SR resource, sending an SR to the base station using the SR resource; or
if the target request resource is the PRACH resource, sending a preamble to the base station using the PRACH resource.

7. The method according to claim 6 , wherein before sending a target request by using the target request resource, to obtain an uplink transmission resource, the method further comprises:
if the request resources are obtained from the first-type cell, determining whether a transmit channel of the target request is idle; and
if the transmit channel of the target request is idle, performing the sending an uplink resource request to the base station using the target request resource; or
if the transmit channel of the target request is not idle, performing the determining a target request resource from the request resources based on time information of user equipment.

8. The method according to claim 6 , wherein after sending an uplink resource request to the base station by using the target request resource, the method further comprises:
if downlink control information (DCI) sent by the base station is received, prolonging receiving duration of a started window timer or starting a window timer whose receiving duration is set; and
if no random access response (RAR) sent by the base station is received within the receiving duration, performing the step of sending an uplink resource request to the base station by using the target request resource.

9. The method according to claim 6 , wherein after sending a preamble to the base station by using the PRACH resource, the method further comprises:
starting a preamble prohibition timer; and
if the user equipment has not received a contention success message when a preset timeout interval of the preamble prohibition timer expires, performing the step of determining a target request resource from the request resources based on time information of user equipment.

10. User equipment, comprising:
a receiver configured to receive first configuration information sent by a base station;
a processor configured to obtain request resources based on the first configuration information, wherein the request resources comprise a scheduling request (SR) resource and a physical random access channel (PRACH) resource; and determine a target request resource from the request resources based on time information of the user equipment, wherein the target request resource comprises one or more of the SR resource and the PRACH resource; and
a transmitter configured to send an uplink resource request to the base station by using the target request resource.

11. The user equipment according to claim 10 , wherein the receiver is further configured to:
if learning, based on the first configuration information, that the request resources belong to a first-type cell, obtain the request resources from the first-type cell; or
if learning, based on the first configuration information, that the PRACH resource belongs to the first-type cell and the SR resource belongs to a second-type cell, obtain the request resources from the first-type cell and the second-type cell respectively, wherein
the first-type cell comprises a cell in which a clear channel assessment (CCA) detection needs to be performed before data to be transmitted is sent, and the second-type cell comprises a cell in which a CCA detection does not need to be performed before the to

Assignees

• Huawei Tech Co Ltd

Inventors

• You Chunhua
• Huang Qufang

Classifications

• H04W74/0833 Primary

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

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W74/0866 Primary

  using a dedicated channel for access · CPC title

• H04W72/569

  of the traffic information · CPC title

• H04W74/0808

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title