PDCCH Timing Reference for Consistent Behavior Start Synchronization
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Solution Overview
Problem
In communication systems, network devices and terminals have inconsistent understanding of the start time of behaviors corresponding to physical downlink control channel (PDCCH) due to the network's inability to accurately determine the PDCCH monitoring occasion where the terminal has detected the PDCCH, affecting transmission performance.
Innovation Solution
A method and apparatus for determining the start time of a behavior corresponding to a PDCCH by monitoring a first PDCCH occasion and using a reference PDCCH monitoring occasion to synchronize the understanding between the network and the terminal, where the PDCCHs may be repeated or have partially same information across multiple occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal determines the start time based on the time of the PDCCH monitoring occasion on which the PDCCH is detected, then the terminal can determine the start time, but the network side cannot accurately know which PDCCH monitoring occasion the terminal has detected the PDCCH, leading to inconsistent understanding between network side and terminal
Solution Approach 1:
The patent introduces a feedback mechanism where the terminal reports the detected PDCCH monitoring occasion information back to the network side. This feedback loop enables the network side to accurately know which PDCCH monitoring occasion the terminal has detected, resolving the information loss and achieving consistent understanding between network side and terminal on the start time of the behavior.
Solution Approach 2:
The patent uses the PDCCH monitoring occasion information as an intermediary element to bridge the network side and terminal. By explicitly indicating and reporting this intermediary information, both sides can synchronize their understanding of the start time, eliminating the inconsistency caused by the terminal's unilateral determination.
2Ease of operation
If the network side and terminal have inconsistent understanding on the start time of the behavior, then the terminal can operate independently, but the transmission performance between terminal and network side is affected
Solution Approach 1:
The feedback mechanism ensures that the terminal's independent operation is coordinated with network side expectations. By reporting the detected PDCCH monitoring occasion, the terminal maintains operational independence while enabling the network side to synchronize timing, thus preserving transmission performance.
Solution Approach 2:
The patent achieves equipotentiality in time understanding between the network side and terminal. Both sides now have equal and accurate knowledge of the start time based on the reported PDCCH monitoring occasion information, eliminating the inconsistency that previously compromised transmission reliability.
Data Source
AI summary
A time determining method and apparatus, a terminal, and a network device. The method includes: performing monitoring on a first physical downlink control channel PDCCH monitoring occasion in a plurality of PDCCH monitoring occasions, so as to detect a first PDCCH; and determining, based on a time of a reference PDCCH monitoring occasion in the plurality of PDCCH monitoring occasions, a start time of a first behavior corresponding to the first PDCCH; where the plurality of PDCCH monitoring occasions are monitoring occasions for performing repetition transmission of the first PDCCH; or information indicated by a plurality of PDCCHs is at least partially the same, where the plurality of PDCCHs are PDCCHs transmitted on the plurality of PDCCH monitoring occasions.