Network-Assisted Resource Blanking for V2X Interference Mitigation
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Solution Overview
Problem
Interference between vehicle-to-everything (V2X) direct communication links and mobile communication links poses a challenge in wireless communication systems, particularly in scenarios where vehicles communicate directly without base station assistance.
Innovation Solution
The proposed solution involves network-assisted blanking of shared radio resources, where the mobile network reserves specific Resource Blocks (RBs) for certain Uu and/or PC5 links, effectively muting or blanking those portions from direct communication links to mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If shared radio resources are used for both mobile communication links and direct communication links, then resource utilization efficiency is improved, but interference between the two types of links increases
Solution Approach 1:
The patent segments the shared radio resources by dividing the available frequency spectrum into different sets: a first set of resources allocated for mobile communication links (Uu links) and a second set for direct communication links (PC5 links). This segmentation allows both link types to share the overall spectrum while preventing mutual interference through frequency separation.
Solution Approach 2:
The patent applies local quality by assigning different frequency characteristics to different communication types. The first frequency band is optimized for mobile network communications while the second frequency band is optimized for direct vehicle-to-vehicle communications, allowing each link type to operate in its optimal frequency environment within the shared spectrum.
2Adaptability or versatility
If resources are allocated without network assistance for direct communication links, then deployment flexibility is improved, but interference management capability deteriorates
Solution Approach 1:
The patent introduces the mobile network as an intermediary that mediates between direct communication links and the frequency spectrum. The network receives requests from wireless devices for direct communication resources, determines appropriate frequency allocations, and manages the assignment of resources from the second frequency set to minimize interference while maintaining deployment flexibility.
3Reliability
If all frequency spectrum is made available for direct communication, then communication availability is improved, but interference with mobile network links increases
Solution Approach 1:
The patent segments the frequency spectrum into distinct first and second frequency sets, allocating the first set for mobile network communications and the second set for direct vehicle communications. This segmentation ensures that direct communication links remain available while preventing them from interfering with mobile network operations.
Solution Approach 2:
Instead of making the entire frequency spectrum available for direct communication, the patent applies partial action by providing only a specific second frequency set for direct communications. This partial allocation ensures sufficient availability for V2X applications while deliberately limiting the spectrum portion that could cause interference with mobile networks.
Data Source
AI summary
A method is performed by a wireless mobile network to mitigate interference between communication links. A request is received for resources needed to support an application by a vehicle relative to another vehicle. The resources are configured based on the application and are used to establish a direct communication link between the vehicles. The resources are to be shared between the direct communication link and another communication link. The mobile network defines certain blanked resources that are disallowed for use to perform the application. Any remaining resources (or non-blanked resources) are allowed for use to perform the application. The blanked resources can be used by the other communication link to avoid interference with the direct communication link. The allocation of resources is communicated to the vehicle to establish the direct communication link with the other vehicle.