Network Infrastructure Sidelink Resource Allocation
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Solution Overview
Problem
The coexistence of IEEE 802.11P and LTE-V2X technologies in the same non-licensed frequency range leads to performance deterioration for both technologies, posing a threat to the future of ITS-G5 systems.
Innovation Solution
A procedure for operating a network infrastructure-based network unit involves dividing roadside network units into two disjoint groups, assigning sidelink resources in the non-licensed frequency range to one group and in the licensed frequency range to the other, thereby managing resource distribution and minimizing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If roadside network units use the same unlicensed frequency range for sidelink communications, then resource utilization is simplified, but collision probability increases and reliability deteriorates
Solution Approach 1:
The patent divides the network infrastructure side network unit's served roadside network units into two disjoint groups (first group and second group). The first group uses sidelink resources in the unlicensed frequency range, while the second group uses sidelink resources in the licensed frequency range. This segmentation separates the traffic streams, reducing collision probability between different roadside network units and improving overall communication reliability.
2Productivity
If all sidelink resources are allocated in the unlicensed frequency range, then spectrum efficiency is improved, but performance deteriorates due to interference from non-infrastructure network units
Solution Approach 1:
The patent applies different frequency range qualities to different groups of roadside network units. The first group (experiencing interference from non-infrastructure units) receives sidelink resources in the unlicensed frequency range, while the second group (requiring higher reliability) receives sidelink resources in the licensed frequency range. This local differentiation of resource quality optimizes both spectrum efficiency and communication reliability based on specific operational conditions.
Data Source
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AI summary
A method for operating a network infrastructure-side network unit of a cell-based wireless communication network is proposed.The procedure comprises determining (204) a first scheduling grant message, wherein the first scheduling grant message comprises an allocation of at least one sidelink resource of the first sidelink channel to the street-side network unit; transmitting (206) the first scheduling grant message on a downlink channel to the street-side network unit; receiving (208) an indication that the allocated sidelink resource of the first sidelink channel is occupied on the uplink channel from the street-side network unit; determining (210) a second scheduling grant message, wherein the second scheduling grant message comprises an allocation of at least one sidelink resource of a second sidelink channel in a licensed frequency range to the street-side network unit; and sending (212) the second scheduling grant message on the downlink channel to the street-side network unit.