UE Paging Monitoring in Unlicensed Bands
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) experiences unnecessary power consumption due to monitoring for paging messages in unlicensed bands, where there is no guarantee of channel occupancy by the base station, leading to potential missed paging messages and increased power usage.
Innovation Solution
The method involves monitoring for paging messages at set PDCCH monitoring occasions and stopping the monitoring when the base station is detected to have accessed the channel, using extended PDCCH monitoring occasion indication information to optimize UE power consumption by reducing unnecessary monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment monitors paging messages at regular intervals to ensure no missed messages, then the reliability of message reception is improved, but the power consumption increases unnecessarily
Solution Approach 1:
The base station performs channel access determination before the paging occasion to predict whether the channel will be occupied. This preliminary action allows the user equipment to adjust its monitoring behavior in advance, stopping monitoring when the channel is determined to be unavailable, thus avoiding unnecessary power consumption while maintaining reliable paging reception when the channel is available.
2Reliability
If the user equipment extends the paging monitoring period to have more opportunities for receiving messages, then the reliability is improved, but the power consumption increases
Solution Approach 1:
The user equipment dynamically adjusts its paging monitoring behavior based on real-time channel status information from the base station. When the channel is determined to be occupied, the UE stops monitoring; when the channel is available, the UE resumes monitoring. This dynamic adaptation allows the system to maintain reliability when needed while significantly reducing power consumption during channel unavailable periods.
3Productivity
If the base station occupies the unlicensed band continuously to ensure paging transmission, then the productivity is improved, but the adaptability to channel conditions deteriorates
Solution Approach 1:
The base station provides feedback information about its channel access status and intended paging transmission to the user equipment. This feedback mechanism allows the UE to adjust its monitoring behavior accordingly, creating a coordinated system where the base station can occupy the channel when needed for efficient paging transmission, while the UE adapts its power consumption based on actual transmission likelihood.
Data Source
AI summary
Provided are a method and apparatus for enabling a user equipment to perform a paging operation. The method includes: monitoring whether a paging message is present at a set of PDCCH monitoring occasions included in a paging occasion, detecting whether a base station has accessed to a channel including a frequency band over which the paging message is transmitted at one or more of the PDCCH monitoring occasions, and stopping the monitoring when detecting that the base station has accessed the channel.