Sidelink Coordination Windows for Interference-Aware Resource Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently coordinating sidelink transmissions between user equipment (UEs) to optimize resource allocation and minimize interference, particularly in scenarios involving multiple technologies and releases of 4G and 5G networks.
Innovation Solution
Implementing a mechanism for sidelink inter-UE coordination that involves determining a selection window for resource allocation based on specific criteria such as wireless device or network node configurations, traffic load, and packet sizes, allowing for selective implementation of protocols to enhance resource management and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inter-UE coordination is implemented for sidelink resource allocation, then resource allocation efficiency is improved, but device complexity and protocol implementation difficulty increase
Solution Approach 1:
The patent introduces a coordination mechanism where UEs exchange coordination messages (e.g., SL-Coordination-Info) to share resource allocation information and interference status. This intermediary communication allows UEs to coordinate their resource selections without requiring complex centralized control, thereby improving resource allocation efficiency while keeping individual device complexity manageable through standardized message formats and procedures.
2Object-generated harmful factors
If coordination messages are exchanged between UEs, then interference minimization is improved, but message transmission overhead and processing time increase
Solution Approach 1:
The patent implements preliminary coordination actions where UEs exchange coordination information before actual sidelink data transmission. By performing resource coordination in advance (e.g., in coordination windows before the resource selection moment), UEs can identify and avoid conflicting resource allocations, thereby minimizing interference while allowing the actual data transmission to proceed without additional time delays.
Solution Approach 2:
The coordination mechanism operates periodically through defined coordination windows and resource selection procedures. UEs periodically exchange coordination messages at specific intervals (e.g., during coordination windows) rather than continuously, which reduces signaling overhead and processing time while maintaining effective interference minimization through regular coordination cycles.
3Adaptability or versatility
If selective protocol implementation is used, then adaptability to different scenarios is improved, but system complexity and implementation difficulty increase
Solution Approach 1:
The patent implements dynamic protocol selection where UEs can adaptively choose different coordination modes and message formats based on current transmission scenarios, traffic conditions, and UE capabilities. The system supports dynamic switching between different resource allocation modes (e.g., mode 1 and mode 2) and coordination levels, allowing high adaptability to diverse scenarios while managing complexity through standardized interfaces and capability indication mechanisms.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A method for a wireless device of a wireless communications system is described herein. In one embodiment, the method includes receiving - by a first wireless device from a second wireless device - a first medium access control (MAC) control element (CE) requesting for an inter-UE coordination between the first wireless device and the second wireless device, wherein the first MAC CE indicates a start time and an end time of a selection window for a resource selection procedure of the second wireless device to select resources for one or more sidelink transmissions by the second wireless device. The method further includes selecting - by the first wireless device - a preferred resource set or a non-preferred resource set during the selection window; transmitting - to the second wireless device - a second MAC CE indicating the preferred resource set or the non-preferred resource set for the second wireless device to select resources for the one or more sidelink transmissions; and receiving - by the first wireless device - the one or more sidelink transmissions. Moreover, a corresponding wireless device as well as related apparatuses, devices and systems are described.