Paging Subframe Selection via PCID Detection
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Solution Overview
Problem
Current mobile communication systems face challenges in providing high reliability for paging message reception while meeting latency requirements, especially when decoding fails, leading to inefficient resource usage and increased latency due to switching to DRX mode.
Innovation Solution
A method where a user equipment (UE) identifies subframes for paging message reception based on detected PCID or PCID groups through synchronization signals, allowing sequential decoding without switching to DRX mode, even if initial decoding fails, ensuring high reliability and low latency by re-attempting in subsequent subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE switches to DRX mode when paging message decoding fails, then power consumption is reduced, but latency increases and service continuity is disrupted
Solution Approach 1:
The UE dynamically adjusts its reception behavior based on service type. For low-latency services, the UE continues monitoring paging messages in subsequent subframes without switching to DRX mode, while for other services it may switch to DRX mode to save power. This dynamic adaptation resolves the contradiction between power saving and latency reduction.
Solution Approach 2:
The network configures different parameter sets (first parameter set vs. second parameter set) that control UE behavior. When low-latency service is detected, parameters are adjusted to prevent DRX mode switching and enable continuous monitoring, thereby reducing latency while managing power consumption through selective parameter application.
2Reliability
If the UE attempts decoding in multiple subframes without switching to DRX mode, then reliability of paging message reception is improved, but power consumption increases
Solution Approach 1:
The network provides different parameter sets that control the UE's paging monitoring behavior. When low-latency service is detected, the UE applies the first parameter set that enables continuous monitoring across multiple subframes for enhanced reliability. For other services, the second parameter set is applied which allows DRX mode switching to conserve power, thus resolving the contradiction through parameter-based adaptation.
3Loss of time
If the UE continuously monitors paging messages in multiple subframes, then service latency is reduced, but resource usage efficiency decreases
Solution Approach 1:
The UE applies different monitoring strategies to different service types. For low-latency services requiring continuous monitoring in multiple subframes, the UE uses the first parameter set to maintain high responsiveness. For other services, the second parameter set enables DRX mode switching to improve resource efficiency. This local differentiation resolves the contradiction between latency reduction and resource efficiency.
Data Source
AI summary
The present specification provides a method for performing paging in a wireless communication system. The method comprises the steps of: confirming whether or not a first paging message transmitted by means of a base station is received during a paging period; if the first paging message has not been received during the paging period, receiving one or more synchronization signals from one or more base stations; detecting a PCID and a PCID group of the one or more base stations on the basis of the one or more synchronization signals; by means of the detected PCID or PCID group, identifying one or more subframes for receiving a second paging message; receiving the second paging message from the one or more identified subframes; and sequentially decoding the second paging message which has been received from the one or more subframes.