Data Flow Mobility Using Flow Identification Information
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Solution Overview
Problem
Current wireless communication technologies inadequately address the selective handover of data flows between access networks of different technology types and do not effectively define or manage data flows during handovers.
Innovation Solution
A wireless transmit/receive unit (WTRU) is equipped with a processor to determine data flow transfers between access networks based on mobility policy information, using Flow Identification Information (FII) to request and execute the transfer of data flows between different access networks, with a mobility function that updates and transmits mobility policy information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data flows are transferred between heterogeneous access networks, then network mobility and adaptability are improved, but device complexity and management difficulty increase
Solution Approach 1:
The patent segments data flow management by introducing Flow Identification Information (FII) that uniquely identifies individual data flows. This allows the system to manage specific data flows independently rather than treating all traffic as a single entity, enabling selective handover of individual flows between heterogeneous access networks while maintaining overall system simplicity.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of a mobility management entity that uses FII to mediate data flow handovers. This intermediary coordinates the transfer between different access networks (e.g., Wi-Fi and cellular), handling the complexity of heterogeneous network management centrally while keeping individual network interfaces relatively simple.
2Measurement precision
If Flow Identification Information is used to manage data flows, then data flow management precision is improved, but information processing overhead increases
Solution Approach 1:
The patent creates Flow Identification Information (FII) as a universal identifier that can represent any data flow regardless of its source, destination, or type. This multi-functional identifier consolidates multiple identification parameters into a single element, enabling precise data flow tracking while minimizing the amount of signaling information required.
Solution Approach 2:
The patent transforms complex data flow identification requirements into a simplified parameter structure where FII serves as the primary identification parameter. By changing from multiple separate identification parameters to a single unified FII parameter, the system achieves precise flow identification with reduced information overhead.
Data Source
AI summary
A wireless transmit/receive unit (WTRU) may communicate using a data flow that is defined according to flow identification information (FII). The WTRU may participate in the transfer of the data flow between access networks of diverse radio access technologies. The WTRU may communicate with a mobility function to obtain access network and mobility policy information. The mobility function may be, for example, an Access Network Discovery Function (ANDSF). The mobility policy information may describe the conditions by which the transfer of data flows between access networks may be permitted.