Sidelink COT Sharing via LBT-Based Resource Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently sharing channel occupancy time (COT) in mode two sidelink communication, particularly in unlicensed frequency bands, due to regulatory restrictions on power spectral density and minimum occupied channel bandwidth, which hinder effective resource allocation and communication efficiency.
Innovation Solution
Implementing a listen-before-talk (LBT) procedure by user equipment (UE) to perform COT sharing, where successful LBT allows transmission of resource indicators or COT indicators, enabling efficient resource allocation and communication during the shared COT.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If COT sharing is implemented in mode two sidelink communication over unlicensed bands, then communication efficiency and resource utilization are improved, but regulatory restrictions on power spectral density and minimum occupied channel bandwidth create constraints that complicate resource allocation
Solution Approach 1:
The patent segments the COT into multiple shared COTs, allowing multiple UEs to independently perform LBT procedures and allocate resources within different time segments. This segmentation resolves the contradiction by enabling efficient multi-UE communication while simplifying individual resource allocation through divided time slots.
Solution Approach 2:
The initiating UE performs the LBT procedure and determines COT sharing parameters in advance before other UEs attempt to access the channel. This preliminary action establishes the framework for resource allocation, allowing subsequent UEs to efficiently join the shared COT without repeating complex LBT procedures, thus improving overall communication efficiency while maintaining regulatory compliance.
2Quantity of substance
If multiple UEs share the same COT in unlicensed bands, then resource utilization is optimized, but the need to perform LBT procedures and adhere to regulatory restrictions increases system complexity
Solution Approach 1:
The patent merges multiple UEs' transmission opportunities into a single shared COT framework. The initiating UE establishes the COT and shares it with multiple other UEs who perform simplified LBT procedures. This merging optimizes resource utilization by allowing concurrent transmissions while managing system complexity through a unified COT management structure.
Solution Approach 2:
The initiating UE acts as an intermediary that manages COT sharing parameters and coordinates resource allocation among multiple UEs. This intermediary role simplifies the system by centralizing COT management, allowing other UEs to focus on their data transmission while adhering to regulatory restrictions through the established framework.
3Productivity
If dynamic COT sharing is implemented to improve resource allocation, then communication efficiency increases, but the coordination overhead and signaling between UEs increases
Solution Approach 1:
The patent extracts the COT management functionality from individual UE decision-making and consolidates it in the initiating UE. The initiating UE determines COT sharing parameters and communicates them to other UEs, eliminating the need for continuous coordination signaling. This extraction improves resource allocation efficiency while reducing signaling overhead by centralizing control.
Solution Approach 2:
Other UEs in the COT sharing group perform autonomous resource selection based on the parameters provided by the initiating UE. Each UE independently determines its transmission resources within the shared COT without requiring continuous coordination, thus improving allocation efficiency while minimizing signaling overhead through self-service resource management.
Data Source
AI summary
Wireless communications systems, apparatuses, and methods are provided. A method of wireless communication performed by a first sidelink user equipment (UE) may include performing a first listen-before-talk (LBT) procedure, transmitting, to a second sidelink UE based on the first LBT procedure being successful, at least one of a resource indicator indicating resources associated with a sidelink communication, wherein the resources are indicated relative to when the first LBT procedure is successful or a channel occupancy time (COT) indicator associated with COT sharing.