Unified Paging Early Indication for UE Power-Saving Paging
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Solution Overview
Problem
Existing wireless communication systems waste processing resources and battery power in UEs due to inefficient paging procedures, as all UEs associated with a paging occasion must perform timing/frequency synchronization and decoding, even if only some are actually paged.
Innovation Solution
Unified paging early indication (PEI) design that merges PDCCH-based, secondary synchronization signal (SSS)-based, tracking reference signal (TRS)-based, and channel state information reference signal (CSI-RS)-based PEI solutions, using configurable sequence configurations and distributed resource block allocations to efficiently indicate which UEs need to process paging messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all UEs perform timing/frequency synchronization and decoding in every paging occasion, then paging reliability is improved, but processing resources and battery power are wasted
Solution Approach 1:
The patent introduces a Paging Early Indication (PEI) signal transmitted before the paging occasion that preliminarily indicates whether paging messages are present. UEs decode this PEI signal in advance to determine if they need to perform full synchronization and decoding procedures, thereby avoiding unnecessary processing when no paging messages are present while maintaining reliability when paging is actually needed
2Reliability
If all UEs perform timing/frequency synchronization and decoding in every paging occasion, then paging reliability is improved, but processing resources are wasted
Solution Approach 1:
The PEI signal serves as a preliminary indicator transmitted before the paging occasion that allows UEs to determine in advance whether paging messages are present. This preliminary action enables UEs to skip unnecessary synchronization and decoding operations when no paging messages are present, thereby improving processing resource efficiency while maintaining paging reliability when needed
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a paging early indication (PEI) indicating whether at least one UE in a UE group or a UE sub-group including the UE is to be paged in a paging occasion. In some aspects, a sequence on which the PEI is based is a physical downlink control channel (PDCCH)-based sequence. In some aspects, the PEI is a sequence-based PEI and is received based at least in part on a sequence configuration configured on the UE. In some aspects, the PEI is a sequence-based PEI and is received based at least in part on a distributed resource block allocation associated with the sequence. The UE may selectively process a paging PDCCH associated with the paging occasion based at least in part on the PEI. Numerous other aspects are described.