DCI Format 2_0 COT Indication for Unlicensed Spectrum
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently monitoring and managing channel occupancy time (COT) information in unlicensed spectrum, particularly for ensuring fair coexistence with incumbent systems like WLANs and minimizing impact on Wi-Fi services.
Innovation Solution
The use of Downlink Control Information (DCI) format 2_0 for indicating COT, where the DCI format is modified to include COT structure in the time domain, allowing User Equipment (UE) to adjust monitoring periodicity and reduce battery power consumption by indicating when the channel is occupied, thereby optimizing channel access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UEs continuously monitor downlink control channels in unlicensed spectrum, then channel access efficiency is improved, but battery power consumption increases
Solution Approach 1:
The patent applies dynamics by making the monitoring periodicity adjustable rather than fixed. UEs can dynamically change their monitoring periodicity based on COT information received from the gNB, allowing them to monitor more frequently when channel activity is high and less frequently when the channel is occupied, thus adapting to varying channel conditions to balance efficiency and power consumption
Solution Approach 2:
The patent changes the monitoring parameter (periodicity) based on COT information. By receiving COT indicators from the gNB, UEs can adjust their monitoring periodicity parameter to match the channel occupancy patterns, reducing unnecessary monitoring during occupied periods and maintaining efficiency during available periods
2Adaptability or versatility
If UEs monitor DCI for COT information in unlicensed spectrum, then fair coexistence with incumbent systems is improved, but monitoring complexity increases
Solution Approach 1:
The patent uses DCI format 2_0, which was originally designed for slot format indication, and extends it to also carry COT information. This multi-functional use of an existing DCI format allows the system to achieve fair coexistence with incumbent systems while avoiding the need to create entirely new monitoring mechanisms, thus limiting the increase in complexity
Data Source
AI summary
Methods, systems, and storage media are described for monitoring downlink control information (DCI). In particular, some embodiments may be directed to monitoring DCI for an indication of channel occupancy time (COT) information. Other embodiments may be described and/or claimed.