Sidelink Unlicensed Channel Occupancy Sharing for Lower Interference
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently sharing channel occupancy in sidelink unlicensed spectrum, particularly in managing contention and resource allocation for devices communicating directly with each other, leading to inefficiencies and interference.
Innovation Solution
Implementing a mechanism for shared channel occupancy in sidelink unlicensed spectrum that allows wireless devices to selectively apply protocols based on criteria such as device configurations, traffic load, and packet sizes, enabling efficient resource allocation and contention management among devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If devices use traditional contention-based protocols in unlicensed spectrum, then channel access is simplified, but channel occupancy sharing efficiency deteriorates and interference increases
Solution Approach 1:
The patent implements dynamic channel occupancy sharing where devices can transition between different access modes (contention-based and scheduled) based on real-time channel conditions and traffic requirements. The network can dynamically allocate resources and adjust contention parameters to optimize channel usage efficiency while managing interference levels.
Solution Approach 2:
The patent modifies traditional contention parameters such as contention window sizes, backoff counters, and priority levels to improve channel occupancy efficiency. By adjusting these parameters dynamically based on channel conditions and device priorities, the system achieves better resource utilization while controlling interference through optimized access patterns.
2Productivity
If devices implement selective protocol application based on configurations and traffic load, then resource allocation efficiency improves, but device complexity increases
Solution Approach 1:
The patent pre-configures protocol selection criteria and parameters during device initialization and network setup. Devices receive pre-defined rules for when to use contention-based versus scheduled access based on their capabilities and service requirements, eliminating the need for complex real-time decision-making and reducing operational complexity while maintaining allocation efficiency.
3Productivity
If channel occupancy is shared among multiple devices, then spectrum utilization improves, but contention management complexity increases
Solution Approach 1:
The patent introduces a network-based intermediary that coordinates channel occupancy sharing among devices. The network entity manages contention parameters, allocates resources, and resolves conflicts between devices, thereby simplifying individual device complexity while enabling efficient multi-device spectrum utilization through centralized coordination.
Data Source
AI summary
A first wireless device receives first sidelink control information comprising one or more parameters indicating a reserved resource for a second sidelink transmission. The first wireless device initiates a channel occupancy for a first sidelink transmission before the reserved resource, wherein initiating the channel occupancy is based on: a first type of channel access procedure; and an energy detection threshold for channel occupancy sharing. The first wireless device transmits a second sidelink control information indicating sharing the channel occupancy with the second wireless device for the second sidelink transmission in the channel occupancy. The first wireless device transmits, using a second type of channel access procedure and based on sharing the channel occupancy with the second wireless device, a third sidelink transmission within the channel occupancy and after the second sidelink transmission.