Reverse-Path Packet Routing Without Return Path Overhead
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Solution Overview
Problem
Existing packet transmission methods incur inefficiency due to the inclusion of return path information in forward packets, increasing packet length and affecting transmission reliability.
Innovation Solution
A method where network devices obtain return path information based on forward path information within the packet, allowing for co-routing of forward and return paths without including return path data in the forward packet, thereby reducing packet length and improving transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If return path information is included in forward packets to ensure co-routed paths, then path routing reliability is improved, but packet length increases and transmission efficiency deteriorates
Solution Approach 1:
The patent extracts the return path information from the forward packet by having the destination device generate the return path information locally based on the received forward path information, rather than including it in the forward packet. This eliminates the harmful factor (excessive packet length) while preserving the useful function (ensuring co-routed paths through destination device generation of return path info).
Solution Approach 2:
The destination device acts as an intermediary that receives forward path information, processes it to generate return path information, and uses it to send return packets. This intermediary approach allows the system to achieve co-routed paths without burdening the forward packet with return path data, thus resolving the contradiction between reliability and packet length.
2Adaptability or versatility
If return path information is included in forward packets to enable co-routed paths, then path co-routing is improved, but packet transmission efficiency deteriorates
Solution Approach 1:
The patent removes the return path information from the forward packet structure, extracting only the necessary forward path information and allowing the destination device to independently generate the return path information. This extraction eliminates the bottleneck that reduced transmission efficiency while preserving the co-routing capability through the destination device's processing function.
Solution Approach 2:
The destination device performs self-service by generating its own return path information based on the received forward path information, without requiring the forward packet to carry pre-computed return path data. This self-service mechanism enables co-routed paths while maintaining high packet transmission efficiency, as packets only carry essential forward path information.
3Measurement precision
If forward packets carry both forward and return path information, then path detection accuracy is improved, but data transmission speed deteriorates
Solution Approach 1:
The patent extracts return path information generation from the forward packet, placing it in the destination device's processing function. The forward packet carries only forward path information, which reduces the amount of data to transmit and improves speed, while the destination device's processing capability ensures path detection accuracy is maintained through local generation of return path information.
Data Source
AI summary
A packet sending method and a device are provided, to improve packet transmission efficiency. The method includes: A first network device receives a first packet from a second network device, where the first packet includes information about a first forwarding path, and the first forwarding path is a forwarding path for sending the first packet from the second network device to the first network device. The first network device obtains information about a second forwarding path based on the information about the first forwarding path, where the second forwarding path is a reverse path of the first forwarding path. The first network device sends a second packet to the second network device through the second forwarding path, where the second packet carries the information about the second forwarding path.