Sidelink Control Message Spatial Reuse Indicator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, the spatial reuse of reserved resources by neighboring UEs can lead to increased interference, decreased network throughput, and reduced quality of communications, as the transmitting UE may be unaware of which devices are reusing the resources.
Innovation Solution
A transmitting UE manages the reuse of resources reserved for sidelink communications by transmitting a sidelink control message that includes scheduling information, reserved resources, and a reuse allowance indicator, allowing neighboring UEs to determine whether and how to reuse these resources based on spatial reuse parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If neighboring UEs reuse reserved resources for spatial reuse, then resource utilization efficiency is improved, but interference with transmitting UE communications increases
Solution Approach 1:
The transmitting UE changes the parameter state of reserved resources by setting a reuse allowance indicator that transitions resources from a non-reusable state to a reusable state with controlled interference. This parameter change enables neighboring UEs to identify and reuse resources while the transmitting UE can manage interference levels through selective allowance.
Solution Approach 2:
The system introduces dynamic control over resource reuse by allowing the transmitting UE to change the reuse allowance status of reserved resources based on current communication conditions. This dynamic approach enables the system to adapt resource allocation in real-time, balancing between allowing spatial reuse for improved efficiency and preventing reuse when interference would degrade communication quality.
2Reliability
If transmitting UE reserves resources for subsequent communications, then communication reliability is improved, but resource availability for other UEs decreases
Solution Approach 1:
The transmitting UE segments reserved resources into two categories: those marked as reusable and those marked as non-reusable. This segmentation allows partial sharing of resources with neighboring UEs while protecting critical resources needed for reliable communication, thereby achieving both improved resource availability and maintained communication reliability.
Solution Approach 2:
Different quality levels are applied to different reserved resources based on their reuse allowance status. Resources marked for reuse have higher availability quality for neighboring UEs, while resources marked as non-reusable maintain higher reliability quality for the transmitting UE's subsequent communications. This local differentiation resolves the contradiction between reliability and adaptability.
3Object-affected harmful factors
If transmitting UE transmits scheduling information to manage resource reuse, then interference control is improved, but signaling overhead increases
Solution Approach 1:
The essential interference control information (reuse allowance indicator) is extracted from the full scheduling information and transmitted separately to neighboring UEs. This extraction allows neighboring UEs to make reuse decisions based on the critical indicator without requiring them to process complete scheduling information, thereby reducing signaling overhead while maintaining effective interference control.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for a first user equipment (UE) to manage the reuse of resources reserved for sidelink communications by the UE. The first UE may identify scheduling information for a sidelink shared channel between the first UE and a second UE, and the first UE may reserve a set of resources for subsequent sidelink communications by the first UE. The first UE may transmit a sidelink control message indicating the scheduling information and the reserved resources to one or more neighboring UEs. The sidelink control message may include a reuse allowance indicator that may indicate whether the set of reserved resources is available for spatial reuse by the neighboring UEs. The neighboring UEs may determine whether the reuse the reserved resources based on the control message, the reuse allowance indicator, or both.