Transmission System Context Identification Header Compression
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Solution Overview
Problem
The communication industry faces inefficiencies due to high overhead costs in transmitting TCP/IP packets, particularly in VoIP, where the header occupies a significant portion of bandwidth, leading to wastage and inefficient use of wireless network resources.
Innovation Solution
A transmission system and method that employs a compressor, intermediate terminal, and decompressor to create and manage context identification (CID) tables, allowing for point-to-point robust header compression (ROHC) without the need for per-hop decompression and recompression, thereby optimizing bandwidth usage and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional TCP/IP header transmission is used, then complete header information is transmitted, but bandwidth is wasted and transmission efficiency is low
Solution Approach 1:
The patent extracts only the essential compression context information (CID, sequence numbers, selective field indicators) from the complete TCP/IP header, transmitting only these extracted elements through the network. The full header is reconstructed at the decompressor using the initial forwarding table and context identification mechanisms, thereby reducing bandwidth consumption while maintaining header information completeness.
2Adaptability or versatility
If traditional ROHC per-hop decompression and compression is used, then intermediate terminals can process packets, but power consumption increases and transmission time is extended
Solution Approach 1:
The patent performs preliminary compression at the source terminal before transmission, creating a compressed packet format that can be directly forwarded by intermediate terminals without decompression. The compression context is established in advance using candidate CID selection and initial forwarding tables, enabling intermediate nodes to simply relay the already-compressed data, thereby reducing their processing power consumption and transmission time.
3Loss of energy
If header compression is implemented, then bandwidth is saved, but system complexity increases due to compression and decompression processes
Solution Approach 1:
The patent creates a universal compression framework where the initial forwarding table and candidate CID selection mechanism can be applied across different network scenarios and terminal types. The compression context establishment process serves multiple functions: identifying compression opportunities, selecting appropriate CIDs, and preparing forwarding tables, thereby managing system complexity through a multi-functional approach.
4Measurement precision
If multiple candidate CIDs are maintained in forwarding tables, then compression accuracy is improved, but memory requirements and processing overhead increase
Solution Approach 1:
The patent maintains multiple candidate CIDs in the initial forwarding table to ensure accurate compression matching, but only activates and transmits the specific CID that is actually needed for the current compression context. This partial action approach ensures high compression accuracy when needed while avoiding the memory and processing overhead of maintaining and processing all candidate CIDs simultaneously in active transmission.
Data Source
AI summary
A transmission system and a transmission method are provided. The transmission system comprises a compressor, an intermediate terminal, and a decompressor. The compressor transmits an initial Internet Protocol package (IP package). The initial IP package comprised an initial forwarding table. The initial forwarding table records at least one candidate context identification (CID). The intermediate terminal receives the IP package and selects the at least one candidate CID different from an intermediate CID recorded in the intermediate terminal, so as to create an intermediate forwarding table. And, the intermediate terminal transmits an intermediate IP package. The decompressor receives the intermediate IP package. The decompressor selects the at least one candidate CID different from a decompressor CID recorded in the decompressor to be a target CID.