5G UE Paging Group Indicator for Selective PDSCH Decoding
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing paging operations, particularly in 5G networks, due to the complexity of managing diverse service requirements such as enhanced mobile broadband, massive machine-type communication, and ultra-reliability low-latency communication, which demand improved methods for monitoring and decoding downlink channels.
Innovation Solution
A method and apparatus for a UE in a wireless communication system that involves monitoring a physical downlink control channel (PDCCH) in a configured paging occasion, acquiring downlink control information (DCI) format, and determining whether the UE corresponds to a paging group indicator to decode the physical downlink shared channel (PDSCH) based on the indicator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors and decodes PDSCH for every paging occasion, then paging reliability is improved, but power consumption increases
Solution Approach 1:
The patent extracts the essential paging information (paging group indicator) from the PDCCH and places it in a separate field that can be decoded without fully processing the PDSCH. This allows the UE to determine whether it needs to decode the complete PDSCH payload, thereby extracting only the necessary information and avoiding unnecessary power consumption while maintaining paging reliability.
Solution Approach 2:
The patent implements partial decoding by first checking the paging group indicator in the PDCCH before committing to full PDSCH decoding. This partial action (checking the indicator) is sufficient to determine whether full decoding is necessary, reducing the average power consumption while ensuring that no paging messages are missed.
2Measurement precision
If the UE decodes all PDSCH messages in paging occasions, then paging accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent segments the paging message structure into two parts: a first part (PDCCH with paging group indicator) that can be quickly decoded to determine relevance, and a second part (PDSCH payload) that is only decoded when necessary. This segmentation reduces processing complexity by avoiding unnecessary decoding of the entire message while maintaining paging accuracy through the two-stage verification process.
3Reliability
If paging resources are allocated for all UEs, then paging coverage is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent applies local quality by allocating full paging resources (PDSCH) only to UEs whose paging group indicator matches their assigned group, while other UEs use minimal resources (PDCCH only) to determine they are not paged. This creates different resource allocation quality levels based on local UE conditions, improving overall resource allocation efficiency while maintaining coverage for all UEs.
Data Source
AI summary
The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data transmission rate than a 4th generation (4G) communication system, such as long term evolution (LTE). According to various embodiments of the present disclosure, provided is an operation method of a UE in a wireless communication system, the method comprising the steps of: monitoring a physical downlink control channel (PDCCH) in a configured paging occasion; acquiring a downlink control information (DCI) format via the PDCCH; acquiring a paging group indicator included in the DCI format; receiving a physical downlink shared channel (PDSCH) scheduled by the DCI format; determining whether a UE corresponds to the paging group indicator; and performing decoding on the PDSCH on the basis of whether the UE corresponds to the paging group indicator.