V2x Transport Format Switching for Resource Fragmentation
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Solution Overview
Problem
In wireless communications, especially for vehicle-to-other (V2x) applications, high resource loads lead to resource fragmentation, resulting in inefficient utilization and potential collisions, which can reduce the reliability and range of V2x channels.
Innovation Solution
Implementing a method where wireless devices detect high-load situations and switch to alternative transport formats with adjusted radio parameters, such as reduced bandwidth and fewer retransmissions, to reduce resource fragmentation and improve system-level resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If Decentralized Congestion Control (DCC) algorithms are used to reduce load by increasing transmit data rate or reducing packet rate, then resource load is reduced, but spectrum fragmentation is not reduced and the number of transmissions is reduced
Solution Approach 1:
The patent applies dynamics by making the transport format adjustable based on detected resource load conditions. The system dynamically switches between different transport formats (first format for normal conditions, second format for high-load conditions) to adapt to changing spectrum conditions, thereby reducing fragmentation while maintaining reliable transmissions.
Solution Approach 2:
The patent changes physical parameters of the transport format specifically the bandwidth parameter by switching to a second transport format with reduced bandwidth when high resource load is detected. This parameter change allows better spectrum utilization and reduces fragmentation without simply reducing transmission count.
2Adaptability or versatility
If multiple wireless devices use different transport formats on the same pool of contention-based resources, then device diversity is supported, but resource fragmentation increases
Solution Approach 1:
The patent promotes homogeneity by having all wireless devices use the same transport format (second format with reduced bandwidth) when high resource load is detected. This uniformity across devices reduces resource fragmentation and improves spectrum utilization while still allowing adaptability through the conditional switching mechanism.
Solution Approach 2:
The system dynamically adjusts the transport format used by devices based on detected resource load conditions. Under normal conditions, devices can use diverse formats for adaptability; under high-load conditions, they switch to a unified format to reduce fragmentation, thus dynamically balancing diversity and uniformity.
3Ease of operation
If contention-based spectrum is used for V2x communication, then device autonomy is maintained, but resource fragmentation occurs under high user density
Solution Approach 1:
The patent implements self-service by enabling wireless devices to autonomously detect resource load conditions and independently switch between transport formats without centralized control. Each device monitors the spectrum and adjusts its own transmission parameters, maintaining device autonomy while collectively reducing resource fragmentation.
Solution Approach 2:
The system allows devices to dynamically adjust their transport format based on real-time spectrum conditions. This dynamic adaptation enables autonomous devices to self-regulate and reduce resource fragmentation without requiring centralized coordination, maintaining ease of operation while improving resource allocation stability.
Data Source
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AI summary
A method in a wireless device (110) is disclosed. The method comprises detecting (404) that a load associated with a set of radio resources allocated for vehicle-to-other (V2x) communication exceeds a load threshold, the wireless device having a first transport format for V2x transmissions. The method further comprises upon detecting that the load associated with the set of radio resources allocated for V2x communication exceeds the load threshold, selecting (408) a second transport format for use in a subsequent V2x transmission by the wireless device.