Paging Early Indication Reduces UE Power Consumption
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Solution Overview
Problem
Current paging processes in wireless communications result in high power consumption due to unnecessary SSB measurements and PO detections, even when a UE is not paged, as UEs need to monitor multiple SSBs and perform PO detection, leading to increased power usage despite low paging rates.
Innovation Solution
Implementing Paging Early Indication (PEI) to inform UEs whether to perform PO detection, with PEI transmitted in the PDCCH, allowing UEs to determine the number of PEIs associated with the target PO based on channel quality and configuring the search space set within a PEI detection window, which ends before the target PO, to reduce unnecessary measurements and detections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors multiple SSBs and performs PO detection in each paging cycle, then the UE can reliably detect paging messages, but the power consumption increases significantly
Solution Approach 1:
The network transmits PEI (Paging Early Indication) before the paging occasion to preliminarily indicate whether there is paging information for the UE. Based on this early indication, the UE can decide whether to wake up for PO detection, avoiding unnecessary wake-ups and SSB measurements when there is no paging information, thus reducing power consumption while maintaining reliable paging detection
Solution Approach 2:
PEI acts as an intermediary mechanism between the network and the UE in the paging process. The PEI provides early notification about the presence of paging information, allowing the UE to make informed decisions about whether to perform full PO detection, thereby reducing unnecessary power consumption while ensuring reliable paging message reception when needed
2Stability of the object's composition
If the UE performs SSB measurements and PO detection even when not paged, then the UE maintains proper channel synchronization, but unnecessary power is consumed
Solution Approach 1:
PEI is transmitted before the PO to preliminarily indicate whether paging information exists. The UE uses this early indication to decide whether to perform SSB measurements and PO detection, thereby maintaining channel synchronization only when necessary, avoiding unnecessary power consumption while preserving synchronization stability when needed
3Measurement precision
If the UE wakes up before the target PO to measure SSBs for AGC and tracking, then the UE maintains proper reception quality, but the power consumption increases
Solution Approach 1:
PEI provides preliminary indication before the PO about whether paging information is present. The UE uses this early information to decide whether to wake up early for SSB measurements, maintaining channel quality measurement capability when needed while avoiding unnecessary early wake-ups and associated power consumption when there is no paging information
Data Source
AI summary
Methods and apparatuses for paging early indication are disclosed. A method at an UE comprises receiving a paging configuration and a configuration for search space (SS) set for paging early indication (PEI); determining a target paging occasion (PO) for receiving paging message based on the paging configuration; determining a SS set duration for detecting a target PEI; and determining a bit sequence in the target PEI for the target PO based on at least an index of the SS set duration.