Multi-Access Terminal ANDSF Session Management for Mobility Delay Reduction
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Solution Overview
Problem
Current communication session management between multi-access terminals and heterogeneous access network mobility management devices often results in increased access mobility delays and service degradation due to the need for repeated secure session establishment and topology information retrieval during service sessions.
Innovation Solution
Maintaining an open communication session between the multi-access terminal and the ANDSF server throughout the service session, utilizing periodic notifications to keep the session active, thereby reducing the need for repeated secure session establishments and enabling quicker access network discovery and mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a secure communication session is established between multi-access terminal and ANDSF server during each service session, then security is ensured, but access mobility delay increases due to repeated session establishment
Solution Approach 1:
A communication session is established in advance between the multi-access terminal and the ANDSF server before the actual service session begins. This preliminary session remains open during the service session, allowing the terminal to access topology information without repeatedly establishing secure sessions, thus reducing access mobility delay while maintaining security through the pre-established secure channel
Solution Approach 2:
The communication session between the terminal and ANDSF server is maintained continuously open throughout the service session duration. This continuous session allows uninterrupted access to topology information for mobility decisions, eliminating the need for repeated session establishment and authentication processes, thereby reducing time loss during mobility operations
2Loss of information
If communication session is re-established during service session, then information freshness is improved, but service degradation occurs due to session interruption
Solution Approach 1:
The communication session with the ANDSF server is maintained continuously open throughout the service session, allowing the terminal to retrieve updated topology information without interrupting the service. This continuous connection ensures both information freshness and service quality by eliminating session establishment interruptions while enabling real-time access to network topology updates
3Reliability
If secure tunnel establishment is performed before each mobility operation, then authentication reliability is improved, but mobility speed decreases
Solution Approach 1:
Authentication and secure tunnel establishment are performed in advance before the service session begins. The established secure tunnel remains active throughout the service session, allowing the terminal to perform mobility operations without repeated authentication processes. This preliminary authentication maintains reliability while significantly improving mobility speed by eliminating repeated authentication delays
Data Source
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AI summary
The method involves maintaining a communication session (ss-com) between a multi-port terminal (T) and a device (DMRA) for management of mobility of a heterogeneous access network, during a service session (ss-S) between the multi-port terminal and a service supply device (FS). The service session is supplied to the multi-port terminal by the service supply device. The maintenance is started by a request for establishment of the service session. The communication session triggered by a request for closure of the service session, is closed. Independent claims are also included for the following: (1) a device for management of a communication session between a multi-port terminal and a device for management of mobility of a heterogeneous access network (2) a device for management of mobility of the heterogeneous access network (3) a multi-port terminal for multi-port communication.