DIRECT ACCESS METHOD AND DEVICE

DE602020051629T2Active Publication Date: 2025-05-21HUAWEI TECH CO LTD
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Patent Information

Application Number
DE602020051629
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2019-02-15
Filing Date
2020-02-14
Publication Date
2025-05-21
Estimated Expiration
2040-02-14

AI Technical Summary

Technical Problem

The existing 2-step random access channel (RACH) scheme in communications systems has low transmission efficiency due to the use of a common physical downlink control channel (PDCCH) for scheduling response messages, which does not adapt well to the varying content and size differences of messages from different terminal devices.

Method used

A method where terminal devices monitor both a common and specific PDCCH search spaces to receive response messages, with the common PDCCH scheduling responses to random access preambles and specific PDCCH scheduling responses to physical uplink shared channels (PUSCH), allowing adaptive adjustment of transmission based on message detection status.

Benefits of technology

This approach enhances transmission efficiency by allowing flexible and efficient response message transmission, reducing complexity and power consumption in terminal devices, and supporting different message types effectively.

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Abstract

This application provides a random access method and an apparatus, to improve transmission efficiency of a response message based on the response message scheduled by a plurality of PDCCHs. The random access method includes: A terminal device receives a first control channel resource set used to monitor a common physical downlink control channel PDCCH and a second control channel resource set used to monitor a specific PDCCH that are sent by a network device; the terminal device sends a first message to the network device; and the terminal device monitors a first search space corresponding to the first control channel resource set and a second search space corresponding to the second control channel resource set to receive at least one of the common PDCCH and the specific PDCCH, to schedule a PDSCH that carries a response message of the first message.
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