Mobility Protocol Selection in Mobile Communication Systems
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Solution Overview
Problem
In the 3GPP mobile communication system, the lack of efficient protocol management for mobility between different access systems and networks leads to increased failure rates in IP tunnel setup and unnecessary resource waste due to mismatched mobility protocols between terminals and networks.
Innovation Solution
A method where a network node receives information about mobility protocols supported by both the terminal and itself, determines the appropriate protocol for IP tunnel setup, and notifies the terminal, allowing for flexible protocol selection and management to optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple mobility protocols are supported for different access systems, then adaptability and versatility are improved, but device complexity and protocol management difficulty increase
Solution Approach 1:
The terminal performs preliminary actions by determining its supported mobility protocols in advance before accessing the network. The terminal includes this protocol support information in its access request message to the network node, allowing the network to pre-configure appropriate protocol handling and avoid complex runtime protocol negotiation and mismatch issues.
2Ease of operation
If protocol matching is not performed, then ease of operation is improved, but reliability of IP tunnel setup deteriorates due to mismatched protocols
Solution Approach 1:
The network node receives feedback from the terminal about its supported mobility protocols through the access request message. The network node uses this feedback to determine the appropriate mobility protocol and configure the IP tunnel accordingly, ensuring protocol matching between terminal and network while maintaining simple operation through automated protocol selection.
3Adaptability or versatility
If unnecessary protocol negotiation is performed, then adaptability is improved, but loss of time and energy consumption increase
Solution Approach 1:
The terminal performs preliminary action by determining and declaring its supported mobility protocols before network access. This eliminates the need for time-consuming runtime protocol negotiation between terminal and network, as the protocol selection is already made and communicated in advance through the access request message.
4Device complexity
If protocol information is not exchanged, then device complexity is reduced, but loss of information occurs leading to protocol mismatches
Solution Approach 1:
The terminal performs preliminary action by determining its supported mobility protocols and including this information in the access request message sent to the network node. This preliminary information exchange prevents protocol mismatch issues during IP tunnel setup while maintaining minimal complexity by using existing message structures.
Data Source
AI summary
Disclosed is a method for selecting and managing a mobility protocol between a network and a terminal in a mobile communication system. When the terminal is to setup an IP tunnel for data transmission/reception with the network supporting a plurality of mobility protocols, firstly, the terminal is configured to transmit a list of terminal-supported mobility protocols and/or its preference information (e.g., information about mobility protocol preferred by the terminal) to the network, and secondly, the network is configured to determine (select) a mobility protocol of an IP tunnel for data transmission/reception with the terminal based on the information, thereby enhancing an efficiency of the resource when the IP tunnel is setup between the terminal and the network.