Relay Resource Allocation for Reliable Low-Latency V2X Communication
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Solution Overview
Problem
Current wireless communication technologies face challenges in ensuring reliable and low-latency communication for vehicles due to half-duplex communication and unstable transmission channels, particularly in fast-moving environments, leading to difficulties in decoding messages and maintaining handshaking.
Innovation Solution
Implementing an apparatus that allocates additional resources for message forwarding and prioritizes critical messages by evaluating priority levels, allowing for decentralized message forwarding and resource allocation to enhance reliability and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If vehicles transmit simultaneously on the same time, then communication speed is improved, but decoding reliability deteriorates due to half-duplex communication limitations
Solution Approach 1:
The patent introduces a relay node as an intermediary between two vehicles that wish to communicate simultaneously. The relay receives signals from both vehicles and forwards them to the intended destinations, enabling simultaneous transmission without direct interference between the vehicles. This mediator approach resolves the half-duplex limitation while maintaining decoding reliability.
2Productivity
If resource elements are allocated for own communication, then communication efficiency is improved, but reliability of forwarded messages deteriorates
Solution Approach 1:
The patent segments the resource elements into two distinct sets: first resource elements allocated for the apparatus's own communication and second resource elements allocated for forwarding received signals. This segmentation ensures that the apparatus can efficiently use resources for its own transmissions while simultaneously dedicating resources to relay functionality, thereby maintaining both communication efficiency and message forwarding reliability.
3Reliability
If additional resource elements are allocated for forwarding, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic resource allocation where the base station assigns resource elements based on the operational mode of the apparatus. When in relay mode, additional second resource elements are allocated; when in normal communication mode, only first resource elements are allocated. This dynamic adjustment allows the system to maintain high reliability when needed while avoiding unnecessary complexity during normal operation.
Data Source
AI summary
An apparatus configured to operate in a wireless communication network by generating and transmitting a first wireless signal using a resource element allocated to the apparatus is configured to receive a second wireless signal and to determine that the second wireless signal is to be forwarded within the wireless communication network. The apparatus is configured to transmit a third wireless signal based on the second wireless signal instead of the first wireless signal using the allocated resource element of the wireless communication network.