Paging Alert Channel Segmentation for 5G NR Detection
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in reliably delivering paging messages to user equipment (UE) due to downlink coverage issues, leading to potential missed detections and increased false alarm probabilities, especially in scenarios where UEs are in idle or inactive states.
Innovation Solution
The implementation of a paging alert channel (PAC) with a small size and cyclic redundancy checking (CRC) protection, allowing for per-user indications and improved detectability, reduces the probability of missed detections and false alarms, enabling UEs to switch from idle to connected modes upon receiving paging messages efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional paging channels are used in 5G NR, then system complexity is reduced, but reliability of paging message delivery deteriorates due to downlink coverage issues and missed detections
Solution Approach 1:
The paging indication is segmented into multiple parts: a first indication message sent on a first channel, and a second indication message sent on a second channel. This segmentation allows the system to improve reliability by distributing paging information across multiple transmission paths, reducing the impact of downlink coverage issues on any single channel while managing overall system complexity.
2Reliability
If paging messages are transmitted with higher redundancy for coverage enhancement, then reliability improves, but resource usage efficiency deteriorates
Solution Approach 1:
The system applies partial redundancy by sending different indication messages on different channels rather than duplicating the entire paging message multiple times. The first indication message provides initial paging information, and the second indication message provides additional or alternative indication, achieving improved detection reliability without the excessive resource consumption of full message repetition.
3Reliability
If UEs continuously monitor paging channels in idle state, then paging detection reliability improves, but energy consumption deteriorates
Solution Approach 1:
The system implements periodic monitoring where UEs wake up at specific intervals to check for indication messages on the first and second channels. This periodic action allows UEs to maintain paging detection reliability by periodically checking for messages while consuming significantly less energy compared to continuous monitoring, as UEs can enter low-power states between monitoring intervals.
Data Source
AI summary
In an aspect, a UE may receive, from a network node, an indication of a PAC, wherein the indication is associated with at least a subset of subgroup identifiers of a plurality of UEs associated with a same paging occasion, wherein each of the plurality of UEs is configured to receive the indication of the PAC associated with the same paging occasion. The UE may also at least one message with the network node based on the indication of the PAC.