Control channel resource indication method, user equipment, and network device

Patent metadata

Field	Value
Publication number	US-12513696-B2
Application number	US-202217739950-A
Country	US
Kind code	B2
Filing date	May 9, 2022
Priority date	Dec 30, 2016
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

Example control channel resource indication methods and apparatus are described. One example method includes receiving response information corresponding to a random access preamble, wherein the response information is scheduled by downlink control information carried in common search space and the response information comprises frequency domain resource information of user equipment-dedicated search space. A second frequency domain resource of the user equipment-dedicated search space is determined based on the frequency domain resource information.

First claim

What is claimed is:

1 . A method, comprising:
receiving broadcast information, wherein the broadcast information comprises information indicating a mapping manner of a common search space, and the mapping manner comprises discrete mapping or continuous mapping; determining a first time-frequency resource of the common search space based on the broadcast information; receiving response information corresponding to a random-access preamble, wherein the response information is scheduled by downlink control information carried in the common search space, wherein the response information comprises frequency domain resource information of a user equipment-dedicated search space, wherein the frequency domain resource information comprises a quantity of frequency domain resource units occupied by the user equipment-dedicated search space in frequency domain and a location of the frequency domain resource unit, and wherein each of the frequency domain resource units comprises a reference signal that is used to demodulate the user equipment-dedicated search space; and determining a second frequency domain resource of the user equipment-dedicated search space based on the frequency domain resource information.

2 . The method according to claim 1 , wherein the response information is a random-access response (RAR) message or a message 4.

3 . The method according to claim 1 , wherein the response information further comprises one or more of the following information: subcarrier width information of the user equipment-dedicated search space, scrambling code sequence information of a reference signal in the user equipment-dedicated search space, aggregation level information of the user equipment-dedicated search space, or a transmission mode of the user equipment-dedicated search space.

4 . The method according to claim 1 , wherein before receiving the response information, the method further comprises: sending the random-access preamble, wherein the random-access preamble carries a bandwidth access capability of a user equipment.

5 . The method according to claim 1 , wherein: when a size of time-frequency resources occupied by the user equipment-dedicated search space is greater than a threshold, a control channel aggregation level set is a first set; or when a size of time-frequency resources occupied by the user equipment-dedicated search space is less than the threshold, the control channel aggregation level set is a second set.

6 . The method according to claim 1 , wherein the response information further comprises information indicating a mapping manner of the user equipment-dedicated search space in frequency domain, and the mapping manner is continuous mapping or discrete mapping.

7 . The method according to claim 1 , wherein the broadcast information further comprises indication information that indicates a size of the common search space.

8 . A method, comprising: determining a first time-frequency resource of a common search space; sending broadcast information, wherein the broadcast information comprises information indicating a mapping manner of the common search space; and the mapping manner comprises discrete mapping or continuous mapping; determining response information corresponding to a random access preamble, wherein the response information is scheduled by downlink control information carried in the common search space, wherein the response information comprises frequency domain resource information of a user equipment-dedicated search space, wherein the frequency domain resource information comprises a quantity of frequency domain resource units occupied by the user equipment-dedicated search space in frequency domain and a location of the frequency domain resource unit, and wherein each of the frequency domain resource units comprises a reference signal that is used to demodulate the user equipment-dedicated search space; and sending the response information.

9 . The method according to claim 8 , wherein the response information is a random-access response (RAR) message or a message 4.

10 . The method according to claim 8 , wherein the response information further comprises one or more of the following information: subcarrier width information of the user equipment-dedicated search space, scrambling code sequence information of a reference signal in the user equipment-dedicated search space, aggregation level information of the user equipment-dedicated search space, or a transmission mode of the user equipment-dedicated search space.

11 . The method according to claim 8 , wherein before sending the response information, the method further comprises: receiving the random-access preamble, wherein the random-access preamble carries a bandwidth access capability of a user equipment; determining a second frequency domain resource of the user equipment-dedicated search space based on the bandwidth access capability of the user equipment.

12 . The method according to claim 8 , wherein: when a size of time-frequency resources occupied by the user equipment-dedicated search space is greater than a threshold, a control channel aggregation level set is a first set; or when a size of time-frequency resources occupied by the user equipment-dedicated search space is less than the threshold, the control channel aggregation level set is a second set.

13 . The method according to claim 8 , wherein the response information further comprises information indicating a mapping manner of the user equipment-dedicated search space in frequency domain, and the mapping manner is continuous mapping or discrete mapping.

14 . The method according to claim 8 , wherein the broadcast information further comprises indication information that indicates a size of the common search space.

15 . An apparatus, comprising: at least one processor; and one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to: receive broadcast information, wherein the broadcast information comprises information indicating a mapping manner of a common search space; and the mapping manner comprises discrete mapping or continuous mapping; determine a first time-frequency resource of the common search space based on the broadcast information; receive response information corresponding to a random access preamble, wherein the response information is scheduled by downlink control information carried in the common search space, wherein the response information comprises frequency domain resource information of a user equipment-dedicated search space, wherein the frequency domain resource information comprises a quantity of frequency domain resource units occupied by the user equipment-dedicated search space in frequency domain and a location of the frequency domain resource unit, and wherein each of the frequency domain resource units comprises a reference signal that is used to demodulate the user equipment-dedicated search space; and determine a second frequency domain resource of the user equipment-dedicated search space based on the frequency domain resource information.

16 . The apparatus according to claim 15 , wherein the response information is a random-access response (RAR) message or message 4.

17 . The apparatus according to claim 15 , wherein the response information further comprises one or more of the following information: subcarrier width information of the user equipment-dedicated search space, scrambling code sequence information of a reference signal in the user equipment-dedicated search space, aggregation level infor

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Xu
• Xue Lixia
• Qu Bingyu
• Li Junchao

Classifications

• H04W74/0833

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

• H04W72/044

  based on the type of the allocated resource · CPC title

• H04W72/23

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

• H04W72/20 Primary

  Control channels or signalling for resource management · CPC title

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title