Multicast Routing for V2X Data Packet Transmission
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Solution Overview
Problem
Current V2X communication systems face challenges in achieving high reliability and low latency due to the limited range of direct communication between terminals using single-hop links, which is insufficient for meeting the requirements of modern communication standards like 5G NR.
Innovation Solution
A multicast routing method is introduced into cellular wireless communication networks, allowing multi-hop transmission without the need for maintaining routing information, enhancing data receiving reliability and extending communication range by utilizing multiple forwarding nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single-hop direct communication is used between terminals, then communication simplicity is maintained, but communication distance is limited and reliability is insufficient
Solution Approach 1:
The patent introduces forwarding nodes as intermediaries to relay data packets between source and destination nodes. These forwarding nodes receive data packets, determine whether to forward them based on destination node information in the packet headers, and transmit to appropriate next-hop nodes. This intermediary mechanism extends communication distance and improves reliability without requiring complex pre-established routing tables, as routing decisions are made autonomously based on information carried in the data packets themselves.
2Length of stationary object
If multi-hop transmission is implemented to extend communication range, then communication distance is improved, but transmission reliability and latency requirements become harder to meet
Solution Approach 1:
The patent incorporates destination node information (such as destination address or identifier) directly into the data packet headers before transmission. This preliminary action allows forwarding nodes to make immediate routing decisions upon receiving packets, without needing to query routing tables or perform complex lookups. This pre-packaging of routing information significantly reduces processing latency and improves transmission reliability, enabling multi-hop communication to meet stringent 5G requirements for ultra-low latency and high reliability.
3Ease of operation
If routing information is maintained in the network, then precise packet forwarding is achieved, but system complexity and memory requirements increase
Solution Approach 1:
The patent extracts routing information from the network infrastructure and embeds it directly into the data packet headers. Instead of maintaining routing tables in forwarding nodes, the destination node information travels with each packet throughout its journey. This extraction approach eliminates the need for complex routing information management and memory storage in network devices, while still enabling accurate packet forwarding decisions at each hop based on the embedded destination information.
Data Source
AI summary
Embodiments of this application provide a wireless communication method and apparatus. The method includes: receiving, by at least two forwarding nodes, a first data packet from a source node, where the first data packet includes service data, forwarding node set information of the first data packet, and destination node information; and a forwarding node set of the first data packet includes the at least two forwarding nodes, and the destination node information is used to identify a destination node set and/or a destination node; and sending, by at least one forwarding node in the at least two forwarding nodes, a second data packet, where the second data packet includes the service data, forwarding node set information of the second data packet, and the destination node information.