Inter-UE Resource Coordination Message Formats for NR Sidelink
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Solution Overview
Problem
The existing inter-User Equipment (UE) resource coordination mechanisms in NR SL face challenges in determining which UEs should send coordination messages and what format these messages should take, leading to potential network congestion and inefficient resource selection due to insufficient or contradictory side information.
Innovation Solution
Implement rules and criteria for determining the format and eligibility of resource coordination messages based on thresholds and conditions, using SL-RSRP and geographical distance to balance the benefits of coordination messages with signaling overhead, allowing UEs to prioritize and combine different formats for optimal resource selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs send resource coordination messages to assist each other in resource selection, then resource selection performance is improved, but network load and signaling overhead increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the format of resource coordination messages based on communication conditions. When SL-RSRP exceeds a first threshold or distance is below a second threshold, the system uses a first format with more detailed coordination information. When SL-RSRP is below the first threshold or distance exceeds the second threshold, the system uses a second format with reduced information. This adaptive parameter adjustment optimizes the balance between coordination effectiveness and network load.
Solution Approach 2:
The patent implements dynamics by making the resource coordination message format flexible and adaptive rather than fixed. The receiving UE determines which format to use based on real-time measurement of SL-RSRP and distance parameters. This dynamic adaptation allows the system to optimize between coordination benefits and signaling overhead according to actual communication conditions.
2Measurement precision
If detailed coordination information is transmitted, then resource selection accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent changes the parameter of message format based on communication conditions. When conditions favor accurate resource selection (high SL-RSRP or short distance), detailed coordination information is transmitted. When conditions are less favorable, reduced information formats are used. This parameter change approach optimizes the trade-off between measurement precision and signaling overhead.
Solution Approach 2:
The patent applies partial action by transmitting only the necessary level of coordination information based on actual communication needs. Rather than always transmitting maximum detail, the system transmits sufficient information for accurate resource selection when conditions permit, and reduces information transmission when conditions do not support it, avoiding excessive signaling overhead.
3Device complexity
If UEs transmit coordination messages based on simple criteria, then implementation complexity is reduced, but ineffective messages increase
Solution Approach 1:
The patent uses parameter changes by establishing clear threshold criteria (SL-RSRP threshold and distance threshold) that trigger different message formats. This parameter-based approach simplifies implementation while reducing ineffective messages by only triggering detailed coordination when communication conditions actually support it, thereby reducing power consumption.
Solution Approach 2:
The patent applies the principle of using simple, lightweight threshold criteria rather than complex decision logic. The thresholds act as disposable, easy-to-implement rules that effectively filter out ineffective coordination messages without requiring complex processing, thus reducing both implementation complexity and power consumption.
Data Source
AI summary
Methods for enabling inter-User Equipment (UE) resource coordination are provided. More specifically, methods performed by a receiving device and a transmitting device for enabling inter-UE resource coordination are provided. The methods disclosed herein can help achieve a sound tradeoff between benefits of resource coordination and overhead associated with resource coordination. Specifically, the methods can help reduce network load and ineffective resource coordination message, obtain better suggestion in terms of rules and formats of the resource coordination message, and create a framework for combining different types of resource coordination formats.