Location-Based Channel Occupancy Sharing for Sidelink Interference Control
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Solution Overview
Problem
In wireless communication systems, particularly in vehicle-to-everything (V2X) communication, interference occurs despite channel sensing due to UEs being out of range of each other, leading to undetectable interference from third parties sharing channel resources.
Innovation Solution
Implement location-based channel occupancy sharing for sidelink communication in unlicensed spectrum, where UEs determine a range metric based on location information to decide whether to share channel occupancy, adjusting transmission power or performing additional sensing to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UEs perform channel sensing procedures to determine channel availability, then channel resources can be utilized more efficiently, but interference occurs when UEs are out of range of each other and cannot detect reservations made by other UEs
Solution Approach 1:
The patent introduces location information as an intermediary element that mediates between channel sensing and resource allocation. By incorporating geographic position data, UEs can determine whether they are within the detection range of other UEs making channel reservations. This intermediary allows the system to resolve the contradiction by enabling UEs to make informed decisions about resource sharing based on spatial relationships, preventing interference from UEs that would be undetectable through traditional sensing alone.
2Productivity
If UEs share channel occupancy resources without location-based verification, then resource utilization increases, but interference risk increases when UEs are sufficiently far from the initial UE
Solution Approach 1:
The patent applies local quality by making channel sharing permissions location-dependent. Instead of uniform resource sharing across all UEs, the system grants different levels of access based on each UE's geographic position relative to the initial channel occupant. UEs within a certain distance range are permitted to share resources, while those beyond the range are restricted. This spatially differentiated approach resolves the contradiction by maintaining high resource utilization for nearby UEs while preventing interference from distant UEs.
3Object-affected harmful factors
If UEs perform additional sensing and power adjustment to avoid interference, then interference is reduced, but system complexity and transmission delays increase
Solution Approach 1:
The patent applies preliminary action by having UEs determine their location relative to the initial channel occupant before attempting to share resources. This pre-assessment of spatial relationships allows UEs to make advance decisions about whether they are eligible for resource sharing, eliminating the need for complex post-sensing interference detection and power adjustment mechanisms. The location-based verification is performed once at the beginning, simplifying the overall system complexity while maintaining effective interference avoidance.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive information identifying a shared channel occupancy for a packet transmission resource; determine a range metric for die shared channel occupancy based at least in part on location information; determine whether to share the shared channel occupancy for packet transmission using the packet transmission resource based at least in part on the range metric; and selectively transmit one or more packets in the shared channel occupancy based at least in part on a result of determining whether to share the shared channel occupancy. Numerous other aspects are provided.