V2X Resource Allocation via Speed-Based Selection
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Solution Overview
Problem
Conventional speed estimation techniques in 3GPP systems are unreliable, particularly in vehicular communications, leading to challenges in designing a reliable and efficient system for vehicle-to-everything (V2X) communications, where the speed of vehicles affects communication resources allocation and mobility-related measurement events.
Innovation Solution
The solution involves selecting communication resources for V2X UE based on vehicle speed, using external equipment like speedometers or satellite navigation for accurate speed estimation, and configuring resource pools associated with different mobility states to optimize communication resources allocation, reducing the need for frequent handovers and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional speed estimation techniques (cell change counting) are used in 3GPP systems, then the system can operate with existing infrastructure, but the speed estimation becomes unreliable particularly in vehicular communications
Solution Approach 1:
The patent introduces an intermediary component (external speed measurement device such as speedometer or satellite navigation system) that provides accurate speed information to the communication system. This intermediary bridges the gap between the unreliable conventional cell-change-based estimation and the need for precise speed data for proper resource allocation and handover management in V2X communications.
2Reliability
If communication resources are allocated based on inaccurate speed estimation, then resource allocation can proceed without external equipment, but handover failures increase and communication reliability decreases
Solution Approach 1:
The patent applies preliminary action by obtaining accurate speed information from external equipment before performing resource allocation and handover decisions. The system proactively uses this accurate speed data to pre-configure appropriate communication resources and predict handover needs, thereby preventing handover failures and improving communication reliability before problems occur.
3Measurement precision
If accurate speed estimation using external equipment is implemented, then resource configuration accuracy improves, but the system requires additional external equipment
Solution Approach 1:
The patent leverages the universality principle by utilizing external equipment (speedometers, satellite navigation systems) that vehicles already possess for other purposes. These multi-functional devices serve dual roles: their primary function for vehicle operation and their secondary function for providing accurate speed estimation to the communication system, thereby avoiding additional dedicated hardware while improving measurement precision.
Data Source
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AI summary
A first terminal device for use with a wireless telecommunications system, the first terminal device comprising: a transceiver operable to exchange signalling with a second terminal device using communication resources from within one of a plurality of sets of communication resources, each set of communication resources being associated with a different respective range of possible speeds of the first terminal device, the association being determined in accordance with a predetermined characteristic of the sets of communication resources; and a controller operable to control the transceiver to exchange signalling with the second terminal device using communication resources from within the set of communication resources associated with the range of possible speeds of the first terminal device within which a determined speed of the first terminal device is found.