Cellular phone system, video-phone call control device, cellular phone and video-phone call control method

Abstract

An object of the present invention is to allow a cellular phone to establish a video-phone call even when there is an incoming video-phone call during the packet communications. The cellular phone system comprises a cellular phone and the Mobile Multimedia Switching Center (MMS). The MMS comprises a call type judgment section that judges, when a call request is made to the cellular phone, whether the call request is for a video-phone call; a communication status judgment section that judges whether the cellular phone is performing packet communications; and an adding section that adds call information to the effect that the call request is for a video-phone call to an incoming call signal in cases where the call request is for a video-phone call and packet communications are being performed. The cellular phone comprises reporting means (DCF or the like) for judging whether call information has been added to the incoming call signal when the cellular phone is performing packet communications and for reporting that there has been an incoming video-phone call and establishment means (MTF and TAF (AV) and so forth) for establishing a video-phone call by disconnecting the packet communications.

Description

technical field [0001] The invention relates to a mobile phone, a mobile communication system, a TV communication control device and a control method. Background technique [0002] Conventionally, video calls have been realized using mobile phones (see, for example, Japanese Patent Laid-Open No. 2004-221738 and Japanese Patent Laid-Open No. 2004-120056 , which are Japanese Patent Laid-Open Gazettes). When making a video call with a mobile phone, like an audio phone, a call is made from the mobile phone on the calling side to the mobile phone on the incoming side, and the incoming signal of the call is received by the mobile phone on the incoming side, and the mobile phone on the calling side A connection for TV calls is established with the mobile phone on the incoming call side. [0003] However, when making a call for a video call, when the mobile phone on the caller side is performing packet communication, the connection for the video call cannot be established and the v...

AI Technical Summary

Problems solved by technology

However, in general, in a mobile phone network, a radio bearer for packet communication and a radio bearer for video call cannot be established simultaneously for one mobile phone.

Moreover, due to the standards of mobile communication, even if the mobile phone on the incoming call side receives the incoming signal of the TV call in packet communication, it does not notify the user of the incoming call of the TV call, and does not establish the connection of the TV call, that is, rejects the TV call. call handling

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