Relay-Assisted Network Coding for Obstructed V2X Links
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing vehicle-to-everything (V2X) communications, particularly in scenarios where direct communication links are obstructed or overloaded, leading to reduced data transmission reliability and increased latency.
Innovation Solution
Implementing network coding assisted by a relay device to encode and decode V2X communications, allowing UEs to transmit encoded packets to a relay, which then forwards them to the intended recipient, enhancing data transmission efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct communication links are used in V2X scenarios, then communication simplicity is maintained, but data transmission reliability deteriorates when links are obstructed or overloaded
Solution Approach 1:
The patent introduces a relay device as an intermediary node between source UEs and destination UEs. The relay receives encoded packets from source UEs, performs additional network coding operations, and forwards the coded packets to destinations. This intermediary approach improves transmission reliability by providing alternative transmission paths when direct links are obstructed or overloaded, while the relay device manages the added complexity through systematic encoding and forwarding procedures.
2Reliability
If traditional retransmission protocols are used, then data transmission reliability is improved, but latency increases due to multiple transmission rounds
Solution Approach 1:
The patent applies preliminary action by pre-generating multiple encoded packets at the source UE before transmission using network coding. Instead of waiting for retransmission requests, the source UE encodes the original data into multiple coded packets in advance and transmits them simultaneously or in sequence. The relay device similarly performs preliminary encoding on received packets before forwarding. This approach ensures that sufficient coded packets are available at the destination without requiring multiple transmission rounds, thereby reducing latency while maintaining reliability.
3Productivity
If network coding is implemented without relay assistance, then data transmission efficiency is improved, but communication coverage deteriorates in obstructed scenarios
Solution Approach 1:
The patent extends the communication dimension by introducing a relay-assisted transmission path in addition to direct source-destination links. The relay device operates as an intermediate dimension in the communication topology, receiving packets from source UEs and forwarding coded packets to destination UEs. This dimensional extension allows the system to maintain high data transmission efficiency through network coding while simultaneously improving communication coverage by providing alternative paths when direct links are obstructed, effectively adding spatial redundancy to the transmission system.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to another UE, a set of encoded packets associated with a vehicle-to-everything (V2X) communication, wherein the set of encoded packets are generated according to a network coding scheme, transmit, to a relay device, the set of encoded packets associated with the V2X communication, and receive, from the relay device, an acknowledgment message based at least in part on transmitting, to the relay device, the set of encoded packets associated with the V2X communication. Numerous other aspects are provided.