IPv6 Router Alert Option Field for Packet Processing
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Solution Overview
Problem
The existing Internet Protocol version 6 (Ipv6) requires all routers along a communication path to read the mobile's home address in the hop-by-hop extension header, leading to a substantial reduction in network performance, as this information may not be relevant to all routers.
Innovation Solution
Incorporating a router alert option field in the hop-by-hop extension header, which is optional for routers to read, allowing only a short indication that the information is relevant to the gateway support node, thereby reducing the need for routers to read the entire hop-by-hop field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile's home address is placed in the hop-by-hop extension header, then the gateway support node can identify the appropriate bearer, but all routers along the communication path must read this information which reduces network performance
Solution Approach 1:
The patent extracts only the essential routing information (home address) from the packet data and places it in a compact format in the hop-by-hop extension header. This allows the gateway support node to identify the appropriate bearer while minimizing the processing burden on intermediate routers, as they only need to read the essential identifier rather than full packet context.
Solution Approach 2:
The hop-by-hop extension header acts as an intermediary structure that carries the mobile's home address information. This intermediary element enables the gateway support node to perform accurate bearer identification without requiring all intermediate routers to perform complex processing, thus resolving the contradiction between reliable identification and network performance.
2Loss of information
If routers read the entire hop-by-hop field, then complete information is processed, but network performance is substantially reduced due to unnecessary processing
Solution Approach 1:
The patent extracts only the essential routing information (home address) from the packet data and places it in a compact format in the hop-by-hop extension header. This allows the gateway support node to identify the appropriate bearer while minimizing the processing burden on intermediate routers, as they only need to read the essential identifier rather than full packet context.
Solution Approach 2:
The patent implements partial processing where routers perform only the minimum necessary action (reading the home address identifier) rather than processing the entire hop-by-hop field. This partial action approach maintains information completeness for the gateway support node while significantly reducing the processing overhead for intermediate routers, thereby improving network throughput.
Data Source
AI summary
An internet packet comprises a header field, the header field including a field identifying a source address of the internet packet, a field identifying the destination address of the internet packet and a next header field identifying whether an extension header follows the header and a type of the extension header. The extension header indicates a hop-by-hop option header, the hop-by-hop extension header including a router alert option header type indicating that the extension field is optional for a router to read, and a field providing information for a gateway support node of a packet radio system network. A gateway support node is thereby provided with information, which may be required for example to support a mobile internet protocol (IP). However, by providing the router alert option field, a router is not required to read the remainder of the hop-by-hop option field. As a result, a reduction in the performance of the router in routing internet packets, which may have been incurred if the router was required to read all the hop-by-hop extension field can be limited.