ROHC Controller for WiMAX Service Flow Compression
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Solution Overview
Problem
Wireless data networks face challenges in minimizing deployment costs and data transmission delays due to the need for extensive cable infrastructure and suboptimal air link performance for multimedia-rich data transmissions in WiMAX systems.
Innovation Solution
A robust header compression (ROHC) controller is implemented in WiMAX wireless communication systems to dynamically manage and compress service flows based on Quality of Service (QoS) profiles, optimizing air link channel allocation and feedback strategies for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extensive cable infrastructure is deployed for backhaul access, then network coverage and connectivity are improved, but deployment costs and complexity increase significantly
Solution Approach 1:
The patent combines multiple service flows with the same QoS profile into a single shared airlink channel, reducing the number of separate channels needed and simplifying the overall network infrastructure requirements
Solution Approach 2:
The patent creates a universal ROHC channel that can serve multiple service flows simultaneously, making the channel multi-functional and reducing the need for dedicated infrastructure for each service flow
2Reliability
If multiple dedicated airlink service flow channels are allocated for each service flow, then service quality and reliability are improved, but airlink resource utilization and throughput decrease
Solution Approach 1:
The patent merges multiple service flows into a single shared ROHC channel, allowing better utilization of airlink resources while maintaining service quality through the ROHC compression mechanism
Solution Approach 2:
The patent changes the parameter of channel allocation from dedicated one-to-one mapping to shared many-to-one mapping, improving resource utilization while maintaining service quality through QoS-based channel selection
3Ease of operation
If conventional header formats are used without compression, then protocol compatibility and simplicity are maintained, but overhead increases and airlink efficiency decreases
Solution Approach 1:
The patent applies ROHC compression to change the parameter of header size, reducing overhead significantly while maintaining protocol compatibility through standardized ROHC profiles for common protocols like RTP, RTCP, UDP, and IP
Solution Approach 2:
The patent uses reference to previously transmitted header information (copying common fields) to reduce redundant data transmission, achieving compression while maintaining the ability to reconstruct original headers at the receiver
4Productivity
If ROHC compression is applied to service flows, then overhead is reduced and airlink efficiency is improved, but system complexity and negotiation overhead increase
Solution Approach 1:
The patent performs capability negotiation and channel allocation in advance during service flow setup, so that ROHC compression can be applied without adding complexity during actual data transmission
Solution Approach 2:
The patent introduces a ROHC channel as an intermediary layer between the service flow and the airlink, managing compression functionality centrally and reducing the complexity burden on individual network elements
Data Source
AI summary
A robust header compression (ROHC) controller provides for service flow processing of a ROHC channel in a WiMAX wireless communication system. The ROHC controller controls the negotiations of the MS ROHC capabilities during its registration and the negotiations of the ROHC channel parameters during ROHC enabled service flow setup; the MS ROHC capabilities including ROHC compression and decompression capabilities and ROHC channel and feedback strategies; the channel parameter negotiation covers the ROHC profile set and feedback channel information in addition to the 16e/12D standard. The ROHC controller receives a service flow request for a ROHC enabled service flow, wherein the request includes a QoS profile.