PDCCH-Based Paging Early Indication for UE Energy Reduction
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Solution Overview
Problem
Wireless communication systems face challenges in complex and dynamic environments where signal attenuation or blocking undermines established channel measuring and reporting mechanisms, leading to inefficiencies in managing finite wireless channel resources.
Innovation Solution
The implementation of a method for wireless communications that involves transmitting a paging early indication (PEI) configuration to user equipment (UE) to monitor physical downlink control channels (PDCCH), allowing the UE to determine whether paging messages are scheduled for multiple paging occasions, thereby reducing signaling load and conserving energy by minimizing unnecessary monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs monitor all paging occasions to ensure reliable message reception, then paging message reception reliability is improved, but energy consumption increases and UEs cannot stay in low power state longer
Solution Approach 1:
The network transmits a paging early indication (PEI) before the actual paging occasion to preliminarily indicate whether paging messages are scheduled. UEs monitor this early indication and only proceed to monitor the full paging occasion if the PEI indicates paging is present, thereby avoiding unnecessary monitoring and energy consumption while maintaining reliable reception when needed
2Reliability
If UEs monitor all paging occasions to ensure no messages are missed, then paging message reception reliability is improved, but signaling overhead increases
Solution Approach 1:
The paging indication process is segmented into two parts: a preliminary paging early indication transmitted by the network, and the actual paging occasion. The PEI carries essential information about whether paging messages are scheduled, allowing UEs to avoid monitoring complete paging occasions when unnecessary, thereby reducing signaling overhead while maintaining reliability
3Reliability
If UEs frequently wake up to monitor paging occasions, then paging message reception reliability is improved, but energy consumption increases
Solution Approach 1:
By transmitting the paging early indication before the paging occasion, the system allows UEs to make an informed decision about whether to wake up for the full paging occasion. This preliminary action enables UEs to remain in low power state longer by avoiding unnecessary wake-ups, thereby reducing time loss while maintaining reliable paging reception when needed
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for paging early indication (PEI) configuration and monitoring procedures. In particular, the present disclosure provides techniques for configuring a user equipment (UE) for PEI monitoring. A method that may be performed by a network entity generally includes transmitting, to the UE, a configuration for paging early indication (PEI) occasions for the UE to monitor and transmitting, in at least one of the PEI occasions, a physical downlink control channel (PDCCH) with a PEI that indicates, for multiple paging occasions (POs), whether paging messages are scheduled for the UE in the multiple POs.