V2X Resource Element Sharing for Congestion Control
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Solution Overview
Problem
In V2X communications, the resource pool congestion, spectrum scarcity, and high latency issues due to vehicle density and resource allocation challenges lead to unreliable transmissions, with existing congestion control methods failing to adequately address these problems.
Innovation Solution
A method where a first device shares at least one resource element within a wireless communication network through device-to-device communication, indicating its availability for other devices to utilize, thereby optimizing resource allocation and reducing congestion and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices use distributed sensing-based schemes for autonomous resource selection in NR V2X sidelink mode 2, then device reliability is improved in remote areas with low or no cellular coverage, but resource pool congestion and spectrum scarcity worsen due to vehicle density and resource allocation challenges
Solution Approach 1:
The patent implements self-service by enabling devices to autonomously share their allocated resource elements with other devices without requiring network intervention. The first device automatically identifies unused resource elements from its allocated set and makes them available to second devices through direct device-to-device communication, allowing the system to self-regulate resource distribution in response to congestion conditions
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting resource allocation parameters based on congestion levels. When resource pool congestion is detected, the system modifies the availability status of resource elements from exclusively allocated to shareable, thereby changing the resource distribution parameters to adapt to varying traffic conditions and vehicle density
2Device complexity
If existing congestion control methods implement selective transmissions through data packet dropping or pre-emption mechanisms, then resource allocation is simplified, but latency and reliability worsen for concerned vehicular devices
Solution Approach 1:
The patent inverts the traditional congestion control approach by instead of dropping packets or preempting transmissions, it enables resource sharing where devices can obtain additional resources from other devices' allocated pools. This reverse approach transforms the problem from resource contention to resource collaboration, improving reliability without requiring complex packet management mechanisms
3Manufacturing precision
If devices perform complete resource selection procedures to obtain allocated radio resources, then resource allocation accuracy is improved, but transmission latency increases due to the time required for resource sensing and selection
Solution Approach 1:
The patent applies preliminary action by pre-allocating resource elements to devices and then making unused portions available for sharing before other devices need them. The first device prepares and advertises available resource elements in advance, allowing second devices to immediately utilize these pre-prepared resources without performing complete resource selection procedures, thereby reducing latency while maintaining allocation accuracy
Data Source
AI summary
A method implemented by a first device to share at least one resource element within a wireless communication network, the resource element belonging to a first set of radio resources allocated to the first device within a resource pool, the first device using a device-to-device communication within the wireless communication network, and wherein the first device emits, through the device-to-device communication, an indication that the resource element is available for sharing.