PDSCH Reception Beam Selection for Repeated PDCCH Scheduling
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Solution Overview
Problem
Existing communication standards do not support multiple Physical Downlink Control Channels (PDCCHs scheduling the same Physical Downlink Share Channel (PDSCH), leading to inconsistent and inaccurate determination of transmission and reception beams, which affects the reliability of PDSCH reception.
Innovation Solution
A method for determining a PDSCH reception beam by using one or more PDCCHs to schedule a PDSCH, where a first reception beam is used if the duration between the last symbol of the PDCCH and the first symbol of the PDSCH is shorter than a preset duration, and a second reception beam is used if the duration is longer than or equal to the preset duration, with the beams being the same or different.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PDCCHs are used to schedule the same PDSCH to improve transmission reliability, then PDSCH reception reliability is improved, but beam determination consistency and accuracy deteriorates
Solution Approach 1:
The patent determines the beam for the PDSCH in advance based on the time duration relationship between the PDCCH and PDSCH, before actual PDSCH reception occurs. This preliminary beam determination ensures that both the base station and terminal use consistent beam information, resolving the accuracy and consistency issues that arise when multiple PDCCHs schedule the same PDSCH.
2Reliability
If multiple PDCCHs are used to schedule the same PDSCH, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent uses the time duration parameter (threshold comparison between duration and preset value) as the key distinguishing factor to determine beam selection. This parameter-based approach simplifies the beam management complexity by providing a clear, objective criterion for beam determination, making the system easier to manage despite using multiple PDCCHs for scheduling.
Data Source
AI summary
A method and an apparatus for determining a PDSCH reception beam, a storage medium, and a terminal are provided. The method includes: receiving one or more PDCCHs and determining a to-be-received PDSCH, wherein the to-be-received PDSCH is repeatedly scheduled by the one or more PDCCHs; determining a duration between a last symbol of the one or more PDCCHs which schedule the to-be-received PDSCH and a first symbol of the to-be-received PDSCH; using a first reception beam to receive the to-be-received PDSCH based on the duration being shorter than a preset duration; and using a second reception beam to receive the to-be-received PDSCH based on the duration being longer than or equal to the preset duration, wherein the first reception beam and the second reception beam are the same or different.