UE Relay Status Reporting for D2D Resource Efficiency
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Solution Overview
Problem
In Device-to-Device (D2D) operations within wireless communication systems, there is a need for efficient management of relay functionality to prevent resource interference and redundancy, as User Equipment (UE) may autonomously start or stop relay operations without network control, leading to potential interference and inefficient use of radio resources.
Innovation Solution
A method and apparatus for UE to evaluate relay operation events and transmit reports on its relay status, allowing other UE and the network to synchronize and avoid redundant relay functionalities, thereby improving resource efficiency and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UE autonomously determines relay operation without network control, then relay service availability is improved, but resource interference and inefficiency worsen
Solution Approach 1:
The patent implements a feedback mechanism where UEs report their relay operation status to the network and receive control messages. The UE autonomously determines relay operation status and reports it via RRC signaling, then the network provides feedback through control messages to coordinate multiple UEs and prevent resource conflicts, resolving the contradiction between autonomous operation and resource efficiency
Solution Approach 2:
The patent applies preliminary action by having the network pre-configure UEs with relay operation parameters and resource allocations before autonomous relay operations begin. The network sends RRC connection reconfiguration messages with pre-defined resource pools and transmission parameters, enabling UEs to autonomously operate while avoiding resource conflicts through pre-coordinated configurations
2Area of stationary object
If multiple UEs provide relay functionality simultaneously, then coverage extension is improved, but interference between UEs worsens
Solution Approach 1:
The patent applies local quality by assigning different resource pools, transmission powers, or modulation schemes to different UEs providing relay functionality in different geographic locations. The network configures UE-specific parameters based on local conditions, allowing multiple UEs to extend coverage simultaneously while minimizing interference through location-specific resource allocation
Solution Approach 2:
The network acts as an intermediary that coordinates relay operations between multiple UEs. The network receives relay status reports from UEs, processes this information, and sends control messages to adjust relay operations, thereby mediating between multiple relay UEs to prevent interference while maintaining coverage extension benefits
3Measurement precision
If UE reports relay status frequently, then network control accuracy is improved, but signaling overhead worsens
Solution Approach 1:
The patent implements periodic action by having UEs report relay operation status at predetermined intervals or under specific triggering conditions rather than continuously. The RRC signaling mechanism uses event-triggered reporting where status updates are sent periodically or when relay status changes occur, balancing monitoring accuracy with reduced signaling overhead compared to continuous reporting
Data Source
AI summary
Provided are a method for reporting a state of a relay operation performed by a terminal in a radio communication system and a terminal using the method. The method evaluates an event related to a state of a relay operation of the terminal and, when the event is satisfied, transmits a report for the state of the relay operation.