V2X Radio Resource Allocation via Orthogonal Sets
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Solution Overview
Problem
Existing resource allocation schemes for V2x communications in LTE networks suffer from low spatial reutilization, leading to inefficient use of resources and limited redeployment for other applications, due to uneven distribution of V2x traffic and interference between different groups of wireless devices.
Innovation Solution
A method where a network node allocates a pool of radio resources for V2x communication by dividing them into orthogonal sets with unique identifiers, assigning these sets based on radio-compatibility characteristics, and prioritizing the selection of resources with smaller identifiers to improve spatial reutilization and resource allocation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If distributed resource allocation algorithms are used for V2x applications, then resource allocation is simplified, but spatial reutilization is low
Solution Approach 1:
The patent segments the V2x resource pool into multiple orthogonal resource sets (first resource set, second resource set, third resource set, etc.) with different priority levels. Each resource set contains resources with specific characteristics, allowing the system to allocate different segments to different groups of wireless devices based on their interference relationships and service requirements, thereby improving spatial reutilization while maintaining allocation simplicity.
Solution Approach 2:
The patent applies local quality by assigning different resource sets to different geographical locations or different groups of wireless devices based on their specific interference conditions. Each resource set is optimized for local conditions, with higher priority resource sets allocated to devices in areas with less interference, thus improving overall spatial reutilization while keeping the allocation mechanism simple.
2Adaptability or versatility
If V2x traffic is unevenly spread over network cells, then resource allocation flexibility is improved, but resource reutilization is limited
Solution Approach 1:
The patent implements dynamic resource allocation where the network node continuously monitors the distribution of V2x traffic across network cells and dynamically adjusts the allocation of orthogonal resource sets accordingly. When traffic is unevenly distributed, the system can allocate unused or underutilized resource sets from low-traffic areas to high-traffic areas, improving resource reutilization while maintaining the flexibility to adapt to changing traffic patterns.
Solution Approach 2:
The patent employs feedback mechanisms where wireless devices report their resource utilization status and interference conditions back to the network node. Based on this feedback, the network node can reallocate orthogonal resource sets to improve spatial reutilization, dynamically adjusting resource distribution to match actual traffic demands across different cells.
3Reliability
If orthogonal resource sets are assigned based on radio-compatibility characteristics, then interference between groups is reduced, but resource fragmentation occurs
Solution Approach 1:
The patent changes the parameter of resource set identification by introducing priority levels (first, second, third resource sets) and set identifiers that encode both the orthogonality relationship and the priority information. This parameter transformation allows the system to manage fragmented resources more efficiently, as devices can selectively access resource sets based on their priority needs and interference conditions, reducing the practical impact of fragmentation while maintaining interference reduction benefits.
Data Source
AI summary
A method in a network node is disclosed. The method comprises allocating a pool of radio resources for vehicle-to-other (V2x) communication by a plurality of wireless devices, and dividing the allocated pool of radio resources for V2x communication into a plurality of orthogonal sets of radio resources, each set of radio resources having an associated set identifier comprising one of a plurality of positive integers. The method further comprises assigning one or more radio resource sets to each wireless device among the plurality of wireless devices based at least in part on a radio-compatibility characteristic, and communicating to each wireless device the assigned set of radio resources to use.