IPv6 Header Compression for Mobile Bandwidth Efficiency
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Solution Overview
Problem
The existing Mobile IPv6 communication methods incur significant bandwidth overhead due to the use of additional headers, particularly in wireless networks, where bandwidth is limited.
Innovation Solution
The method replaces the care-of address with a home address without using additional headers by defining unused fields in the message format, allowing terminals to send binding update messages and acknowledge messages with a restoration capability flag, enabling address restoration without additional headers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional headers (home address option and type 2 routing header) are used for mobile terminal communication, then mobility support is improved, but bandwidth overhead increases
Solution Approach 1:
The patent extracts the essential mobility information (home address and care-of address) from the traditional header structure and embeds it directly into the IPv6 header's source and destination address fields. This removes the need for separate home address option and type 2 routing header, eliminating 48 bytes of overhead while preserving mobility functionality.
Solution Approach 2:
The patent merges the functionality of multiple headers (IPv6 basic header, home address option, and type 2 routing header) into a single streamlined header structure. By combining these elements, the patent reduces the total number of headers and eliminates redundant information, achieving significant bandwidth savings while maintaining mobile terminal communication capabilities.
2Reliability
If home address option and type 2 routing header are used in packet transmission, then address restoration capability is improved, but packet size increases
Solution Approach 1:
The patent extracts the address restoration capability from the bulky header structure and implements it using only the source and destination address fields in the IPv6 basic header. This eliminates the need for home address option and type 2 routing header while preserving the ability to restore home addresses at the receiving end.
Solution Approach 2:
The patent changes the parameter usage in IPv6 headers by utilizing the source and destination address fields for dual purposes: both for routing and for carrying home address information. This parameter repurposing eliminates the need for additional headers and reduces packet size while maintaining address restoration capability.
3Adaptability or versatility
If 48 byte additional header is used for mobile terminal communication, then mobility functionality is improved, but bandwidth efficiency deteriorates
Solution Approach 1:
The patent extracts mobility functionality from the 48-byte additional header structure and reimplements it using only the existing IPv6 basic header fields. This extraction eliminates the bandwidth-inefficient additional headers while preserving complete mobility functionality including home address identification and care-of address routing.
Solution Approach 2:
The patent makes the IPv6 basic header fields universal by enabling them to serve multiple functions: standard routing, mobile terminal identification, home address carrying, and care-of address routing. This multi-functionality eliminates the need for separate mobility-specific headers, improving bandwidth efficiency while maintaining full mobility functionality.
Data Source
AI summary
A communication method for using bandwidth efficiently in Internet protocol version 6 (IPv6) is provided to minimize use of header information that is added when the terminal is moved. According to the present invention, while maintaining compatibility between general terminals that conform to the mobile IPv6, bandwidth can be more efficiently used for terminals supporting functions defined in the present invention.