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

Abstract

As a session mobility that moves the session held between the switch source device and the communication partner to a switch destination device other than the switch source device, the switch source device transmits the media data related to the session by multicast or broadcast before device switching The transferred media data is received by the switching destination candidate device, so that the switching destination determining device determined at the time of device switching performs output of the media data instead of the switching source device. As a result, the switching time from the switching source device to the switching destination device can be increased so that the user does not notice it.

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

[0056] However, in the technique of the document "Simures Service Service 実现のためのモバイルマルチメデイアラミドルウエエア", from the start of the reception of the media data at the selected switch destination device, the media data is started to the output unit of the switch destination device. It takes several hundreds of milliseconds to output the 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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