US 12,382,505 B2
Random access preamble sending method and communication apparatus
Xiaomeng Chai, Shanghai (CN); and Yiqun Wu, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Oct. 28, 2021, as Appl. No. 17/512,935.
Application 17/512,935 is a continuation of application No. PCT/CN2020/087891, filed on Apr. 29, 2020.
Claims priority of application No. 201910363256.1 (CN), filed on Apr. 30, 2019.
Prior Publication US 2022/0053577 A1, Feb. 17, 2022
Int. Cl. H04W 74/0833 (2024.01); H04W 72/0446 (2023.01); H04W 72/0453 (2023.01); H04W 74/08 (2024.01)
CPC H04W 74/0841 (2013.01) [H04W 72/0446 (2013.01); H04W 72/0453 (2013.01); H04W 74/0866 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A random access preamble sending method, comprising:
receiving, by a communication apparatus, configuration information from a network device, wherein the configuration information comprises configuration information of a physical random access channel (PRACH) time-frequency resource set;
receiving, by the communication apparatus, indication information from the network device, wherein the indication information indicates one or more valid PRACH time-frequency resources in the PRACH time-frequency resource set that do not conflict with a PUSCH time-frequency resource set, wherein the indication information comprises an index number, wherein the index number indicates an entry in a PRACH time-frequency resource table, and wherein any entry in the PRACH time-frequency resource table defines a PRACH time-frequency resource that is valid in time domain and that is in one or more PRACH time-frequency resources in the PRACH time-frequency resource set; and
sending, by the communication apparatus, a random access preamble on one of the valid PRACH time-frequency resources.