Relay UE Paging Frame and Occasion Information Transmission
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Solution Overview
Problem
The increasing number of user equipment (UEs) in wireless communication systems requires efficient methods for transmitting and receiving data and control information using limited radio resources, while also addressing latency and the need for efficient communication between UEs, particularly in scenarios involving relay communications.
Innovation Solution
A method and apparatus for relaying paging messages between a relay UE and a remote UE, involving the transmission and reception of paging frame and occasion information to efficiently relay messages using a PC5 interface, allowing for reduced power consumption and improved communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay communication is introduced to extend coverage and improve UE communication, then communication reach and reliability are improved, but system complexity and resource management difficulty increase
Solution Approach 1:
A relay UE is introduced as an intermediary device between the remote UE and the network. The relay UE receives paging messages from the network and forwards them to the remote UE, enabling extended coverage while maintaining standardized communication protocols. This intermediary approach solves the coverage extension problem without requiring complex modifications to existing network architecture.
Solution Approach 2:
The communication system is segmented into direct communication mode (UE-to-network) and relay communication mode (UE-to-relay UE-to-network). The network can selectively switch between these modes based on UE location and coverage conditions, providing flexibility while managing complexity through modular operation rather than universal complexity.
2Reliability
If UEs frequently monitor paging channels to ensure timely message reception, then paging reception reliability is improved, but power consumption increases
Solution Approach 1:
The UE monitors paging channels periodically at predetermined paging occasions rather than continuously. The network schedules paging messages at specific intervals, and UEs wake up only at these predetermined times to check for messages, then return to sleep mode. This periodic monitoring maintains paging reception reliability while dramatically reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The system uses the UE's own identity (IMSI, TMSI, or other identifiers) to autonomously determine its specific paging occasions and frames. Each UE calculates and independently identifies its monitoring schedule based on network-broadcast parameters and its own identity, eliminating the need for continuous network coordination and enabling autonomous power-efficient operation.
3Area of stationary object
If relay UEs forward paging messages to remote UEs, then communication coverage is extended, but latency in message delivery increases
Solution Approach 1:
The relay UE pre-establishes a direct communication link with the remote UE before paging message delivery is needed. This pre-established connection includes configured communication resources and parameters, allowing the relay UE to immediately forward paging messages without establishing connections in real-time. This preliminary setup minimizes delivery latency while maintaining extended coverage capabilities.
Data Source
AI summary
A relay user equipment (UE) linked to a remote UE relays paging to the remote UE. The relay UE transmits paging frame (PF) information and paging occasion (PO) information to the remote UE. The relay UE receives a paging message for the remote UE in a PO of the remote UE or in a PO of the relay UE within a PF of the relay UE on the basis of the PF information and the PO information. The relay UE relays the paging message to the remote UE.