Session Mobility Control Server for Seamless DVB-H to Cellular Handover
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Solution Overview
Problem
Current mobile communication devices, such as DVB-H devices, do not support session mobility of multimedia content across different wireless networks, resulting in disruption of content delivery when moving out of the DVB-H network coverage area.
Innovation Solution
A control server or session controller manages the transfer of multimedia content between DVB-H and cellular data networks, enabling seamless session mobility by buffering and rerouting content based on communication session control information from the mobile device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multimedia content is delivered via DVB-H network, then content delivery efficiency is improved, but session continuity deteriorates when moving out of coverage area
Solution Approach 1:
The patent introduces a mobility management entity (MME) and network controller as intermediary components that coordinate between DVB-H and cellular networks. The MME receives session transfer requests from mobile devices, determines target networks, and orchestrates the handover process, enabling seamless session continuity across network boundaries while maintaining efficient content delivery.
Solution Approach 2:
The system dynamically selects between DVB-H and cellular networks based on real-time device location and network availability. The mobile device and network controller continuously monitor coverage areas and automatically switch delivery networks, making the content delivery system adaptive to changing environmental conditions while maintaining session continuity.
2Adaptability or versatility
If session transfer between networks is enabled, then session mobility is improved, but system complexity increases
Solution Approach 1:
The mobility management entity and network controller are designed as universal components that handle multiple functions: session transfer coordination, network selection, handover management, and interoperability between different network types. This multi-functionality reduces the need for separate specialized systems for each network type, thereby managing complexity while enabling broad session mobility.
3Ease of operation
If seamless handover is implemented, then user experience is improved, but network coordination overhead increases
Solution Approach 1:
The system performs preliminary actions by pre-establishing session parameters and preparing target network resources before actual handover occurs. The MME proactively manages session state information and coordinates with potential target networks in advance, reducing the time and overhead required during the actual seamless handover execution.
Data Source
AI summary
A method, device and system for providing communication session mobility of multimedia content delivered to a mobile communication device, such as a Digital Video Broadcasting-Handheld (DVB-H) mobile video device. For example, multimedia content delivered to a mobile communication device via a DVB-H network can be transferred seamlessly to a cellular data network. Session mobility is provided using a control server or session controller configured to manage and facilitate the transfer of the content delivery. The control server manages the transfer in response to receiving appropriate communication session control information from the mobile communication device. The control server can be a network element coupled to or contained within the network that couples a multimedia content source to one or more wireless control points that communicate with the end user mobile communication device. Alternatively, the control server can be partially or completely included or contained within the multimedia content provider.