Header Compression Negotiation for Inter-System Session Transfer
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Solution Overview
Problem
There is a lack of specification regarding the application of header compression for sessions transferred across Evolved Packet System (EPS) and 5th Generation System (5GS), leading to unpredictable behavior, especially for Ethernet header compression which is not supported in EPS.
Innovation Solution
The proposed solution involves introducing new parameters and information elements (IEs) for negotiating the support and use of Ethernet header compression in EPS, allowing the User Equipment (UE) to continue using header compression parameters when transferring sessions from 5GS to EPS, and renegotiating these parameters upon inter-system changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If header compression is applied in 5GS, then data transfer efficiency is improved, but compatibility with EPS is worsened due to lack of specification for inter-system changes
Solution Approach 1:
The patent introduces new parameters and information elements (IEs) for negotiating Ethernet header compression support between UE and network during inter-system changes. These parameters enable the system to adapt header compression behavior when transitioning between 5GS and EPS, resolving the compatibility issue while maintaining efficiency benefits in 5GS.
Solution Approach 2:
The patent implements dynamic negotiation of header compression parameters during data session establishment and modification procedures. The system can adaptively enable or disable Ethernet header compression based on the current operating mode (5GS or EPS) and network capabilities, allowing flexible operation across different network environments.
2Productivity
If Ethernet header compression is introduced in 5GS, then compression efficiency is improved, but device complexity increases due to additional negotiation procedures
Solution Approach 1:
The patent reuses existing 5G core network information elements and procedures for header compression negotiation, making the new Ethernet header compression feature compatible with existing infrastructure. This approach allows the system to leverage existing protocols while adding new functionality, thereby reducing the increase in device complexity.
3Stability of the object's composition
If header compression parameters are maintained during inter-system changes, then data transfer consistency is improved, but reliability is worsened when moving to EPS which does not support Ethernet header compression
Solution Approach 1:
The patent implements feedback mechanisms where the UE and network exchange capability information during data session establishment and modification procedures. This feedback loop allows the system to detect when Ethernet header compression is not supported (e.g., when in EPS mode) and automatically adjust parameters accordingly, maintaining reliability while preserving consistency benefits.
Data Source
AI summary
In accordance an embodiment of the disclosure, a method performed by a user equipment (UE) in a wireless communication system is provided. The method may comprise: identifying an inter-system change from a first mode to a second mode, transferring a data session established in the first mode to the second mode from the first mode, determining whether the UE and a network entity in the second mode support a header compression, and initiating, based on a result of the identifying, a procedure for negotiating a header compression configuration in the transferred data session, wherein the first mode is one of N1 an mode or an S1 mode, and the second mode is the other of the N1 mode or the S1 mode.