Header Compression State Transfer in Mobile Hand-offs
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Solution Overview
Problem
Mobile communications networks face inefficiencies in transferring state information during hand-offs, leading to potential packet loss and compression issues as the number of mobile nodes increases, disrupting seamless communication.
Innovation Solution
A system and method for efficient state transfer in mobile networks, specifically by updating and transferring header compression state information from one network element to another during hand-offs, ensuring seamless operation by using Minimal Headers and maintaining the most recently acknowledged compression state, allowing for optimal compression efficiency without starting from scratch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If state information is transferred during hand-off in traditional mobile networks, then communication continuity is maintained, but processing efficiency deteriorates and packet loss increases as the number of mobile nodes grows
Solution Approach 1:
The patent extracts only the essential header compression state information from the complete state data during hand-off, transferring only the minimal necessary parameters (such as compression context identifiers and reference values) rather than the entire state. This extraction approach maintains communication continuity while significantly reducing processing overhead and improving hand-off efficiency in networks with many mobile nodes.
Solution Approach 2:
The system performs preliminary state preparation by pre-computing and caching header compression states at the source base station before hand-off occurs. When hand-off is triggered, the pre-prepared state information is quickly transferred to the target base station, eliminating the need for complex real-time state computation during the hand-off process itself, thus improving processing efficiency while ensuring reliability.
2Reliability
If complete state information is transferred during hand-off, then seamless communication is achieved, but network scalability deteriorates due to increased processing overhead
Solution Approach 1:
The patent applies extraction by identifying and transferring only the critical header compression state parameters rather than complete state information. This includes extracting compression context identifiers, reference values, and essential compression parameters while omitting redundant data. This approach enables seamless communication to be maintained while reducing the processing overhead sufficiently to support network scalability as mobile node density increases.
3Device complexity
If header compression state is not transferred during hand-off, then processing complexity is reduced, but packet loss occurs and compression efficiency is lost
Solution Approach 1:
The system performs preliminary preparation of header compression state information at the source base station before hand-off occurs. The compression state is pre-computed, validated, and formatted for efficient transfer. When hand-off occurs, this pre-prepared state is quickly transferred to the target base station, ensuring that packet loss is prevented and compression efficiency is maintained without requiring complex real-time state computation during the hand-off process.
Solution Approach 2:
The patent uses copying by creating a transferable representation of the header compression state that can be efficiently replicated and transferred between base stations. Instead of transferring the entire compression state machinery, the system creates a compact copy of the essential state parameters that can be quickly instantiated at the target base station, reducing processing complexity while preventing packet loss through accurate state replication.
Data Source
AI summary
A system and method for efficient state transfer in mobile networks provides improved performance by providing seamless transfer of updated reference state information across network access points during mobile node hand-off. This state transfer processing may be used in an Internet Protocol (IP) network and may include seamless transfer of header compression state.