Sidelink Resource Reselection for Equal-Priority UE Conflicts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In sidelink communication, resource conflicts arise when different user equipment (UEs) reserve the same resource, particularly when data priorities are the same, leading to unresolved conflicts.
Innovation Solution
A UE reselects a resource if its reserved resource overlaps with another UE's reserved resource in time and frequency domains, based on a transmission deadline condition, even if data priorities are the same, to reduce resource conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If different UEs reserve the same resource for data transmission, then resource utilization efficiency is improved, but resource conflict probability increases
Solution Approach 1:
The patent changes the parameter of resource selection by introducing a comparison mechanism between reserved resources. When a UE detects that its reserved resource overlaps with another UE's reserved resource in both time and frequency domains, it triggers a resource reselection process. This dynamic parameter adjustment resolves conflicts while maintaining high resource utilization by allowing multiple UEs to share resources when no conflict exists.
2Reliability
If a UE reselects resource when transmission deadline condition is met, then resource conflict probability is reduced, but resource selection complexity increases
Solution Approach 1:
The patent applies preliminary action by establishing a clear condition threshold (transmission deadline) that triggers resource reselection. The UE compares its transmission deadline with the current time and, upon detecting resource overlap and meeting the deadline condition, proactively reselects resources. This predetermined rule-based approach simplifies the decision-making process despite the added complexity of conflict detection.
Solution Approach 2:
The UE autonomously performs resource conflict detection and self-resolves conflicts by reselecting resources when conditions are met, without requiring external intervention from the network or other UEs. This self-service mechanism handles the complexity internally while maintaining simple external interactions.
3Reliability
If resource reselection is performed when priorities are equal, then resource conflict probability is reduced, but transmission delay increases
Solution Approach 1:
The patent applies partial action by performing resource reselection only when specific conditions are met: resource overlap in both time and frequency domains, equal priority between UEs, and transmission deadline condition satisfaction. This selective reselection approach avoids unnecessary resource changes that would increase delay, while still resolving conflicts when they occur.
Solution Approach 2:
The resource allocation becomes dynamic based on real-time conditions. The UE continuously monitors resource conflicts and transmission deadlines, adjusting its resource usage dynamically. This dynamic approach ensures that reselection occurs only when necessary to resolve conflicts, minimizing unnecessary delays while maintaining low conflict probability.
Data Source
AI summary
This disclosure relates to a communication method and an apparatus. A second terminal device receives first information from a first terminal device on a first resource, where the first information indicates a first reserved resource and a first PDB, and the first reserved resource is a resource reserved by the first terminal device for first data. If the first reserved resource and a second reserved resource have an intersection in each of time domain and frequency domain, and a priority of the first data is the same as a priority of second data, the second terminal device reselects a resource for the second data when a transmission deadline of the second data meets a first condition, where the second reserved resource is a resource reserved by the second terminal device for the second data.