Paging Monitoring Stop Timing Across Multiple Paging Occasions
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Solution Overview
Problem
In wireless communications systems, user equipment (UE) inefficiently expends power monitoring multiple paging occasions (POs) for paging information when a base station fails to gain initial access to an unlicensed wireless channel, leading to inefficient power and system resource utilization.
Innovation Solution
UE determines a channel occupancy status of the base station and identifies a time to stop monitoring for paging information based on channel occupancy time (COT), downlink control information (DCI), or explicit indications, thereby ignoring subsequent POs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors multiple paging occasions (POs) to ensure reliable reception of paging information, then the reliability of paging reception is improved, but the power consumption and time resources of the UE are wasted when the base station fails to gain initial access to the unlicensed wireless channel
Solution Approach 1:
The base station provides feedback to the UE about its channel access status through downlink control information (DCI) or explicit indications. When the base station successfully gains access to the unlicensed channel, it notifies the UE to stop monitoring subsequent POs. This feedback mechanism allows the UE to adjust its monitoring behavior based on actual channel access outcomes, maintaining reliable paging reception while avoiding unnecessary power consumption when the base station cannot transmit.
Solution Approach 2:
The UE dynamically adjusts its monitoring behavior across multiple POs based on real-time channel occupancy status. Instead of statically monitoring all configured POs, the UE adapts its monitoring duration and intensity according to the base station's channel access success, transitioning from continuous monitoring to selective monitoring. This dynamic approach ensures reliable reception when needed while conserving energy when the base station cannot transmit.
2Reliability
If the UE monitors multiple paging occasions (POs) to ensure complete coverage of paging information, then the paging information delivery is improved, but the system resource utilization deteriorates due to wasted time-frequency resources
Solution Approach 1:
The base station sends feedback signals (DCI or explicit indications) to inform the UE about channel access status and paging transmission outcomes. This feedback enables the system to efficiently allocate resources by preventing the UE from monitoring POs that would not contain useful information, thereby improving overall system resource utilization while maintaining complete paging information delivery through the monitored POs.
Solution Approach 2:
The system changes the monitoring parameters of the UE based on channel occupancy status. When the base station successfully accesses the channel, the monitoring duration parameter is reduced or the monitoring stop time is advanced. This parameter adjustment ensures that paging information is completely delivered during the active monitoring period while freeing up time-frequency resources for other communications, thus improving system productivity.
3Reliability
If the UE monitors extended POs or multiple POs to account for potential base station access failures, then the robustness of paging reception is improved, but the monitoring time and power consumption increase
Solution Approach 1:
The base station provides timely feedback through DCI or explicit indications about its channel access status and paging transmission state. This feedback allows the UE to determine the optimal stop time for monitoring, ensuring robust reception during the critical monitoring window while avoiding unnecessary extension of monitoring time when the base station has already successfully transmitted or cannot transmit, thus reducing UE monitoring time loss.
Solution Approach 2:
The base station performs preliminary channel access attempts and notifies the UE of the access outcome before the UE would otherwise continue monitoring extended POs. By providing this preliminary information about channel occupancy status, the system enables the UE to stop monitoring at the appropriate time, maintaining robust paging reception during necessary POs while eliminating wasteful monitoring time in extended POs where no additional information would be available.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for determining a time to stop monitoring a wireless channel for paging information. In some examples, a user equipment (UE) may identify a plurality of paging occasions associated with a wireless channel (e.g., of an unlicensed radio frequency spectrum band) and monitor the wireless channel for paging information from a base station during a first paging occasion of the plurality of paging occasions. The UE may determine a channel occupancy status of the base station with respect to the wireless channel and may determine a time to stop monitoring the wireless channel for paging information. The UE may ignore a remainder of the plurality of paging occasions based on the determined time to stop monitoring the wireless channel.