Switching source device, switching destination device, high-speed device switching system, and signaling method

Abstract

There is provided a session mobility for moving a session held between a switching source device and a communication partner to a switching destination device other than the switching source device. The switching source device transmits medium data associated with the session by multicast or broadcast prior to device switching and a switching destination candidate device receives the medium data transmitted, so that a switching destination confirmed device determined upon device switching outputs the medium data in place of the switching source device. Thus, it is possible to increase the switching speed from a switching source device to a switching destination device to such an extent that a user cannot perceive the time required for switching.

Description

technical field [0001] The present invention relates to a handover source device, a handover destination device, a high-speed device handover system, and a signaling method used therein for realizing session mobility in communication technology and media transmission technology in an IP network. Background technique [0002] In recent years, in addition to optical fiber and ADSL in fixed networks, spot wireless technologies such as WLAN and ad hoc networks have become popular in mobile networks. And, in all places, a ubiquitous network environment with network connectivity will also become a reality. In addition, even in the field of communication terminals, devices with various capabilities represented by network home appliances and public and personal dual-use terminals are being developed. Therefore, realization of various access networks in a ubiquitous network environment and seamless services that enable continuous services by freely switching devices with various cap...

AI Technical Summary

Problems solved by technology

[0055] However, in the technique of the document "Simures Service Service 実现のためのモバルィルルチメディアミドルウェェア", from the start of the reception of the media data at the selected switching destination device, to the output unit of the switching destination device It takes several hundreds of milliseconds to output the media data (step S1905 to step S1909), and the seamless service cannot be fully realized.

And, in order to avoid delay, the sending unit of the switching source device sends according to the amount of media data newly received by the receiving unit (step S1810). The media data of cannot be transferred to the switching destination device

Therefore, since the output unit of the switching destination device cannot output the amount of media data, a gap occurs in the output media data, and as a result, it becomes discontinuous output.

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