France Telecom

Orange Personal Communications Services Limited

Orange Personal Communciations Services Ltd.

Martin Stubbs

Timothy Haysom

Anila Jacob

Philip Reynolds

Voice and/or image data packets are transferred by a packet handler between user stations in a GSM-type mobile communications system using a General Packet Radio Service (GPRS) data link. Control data for controlling a call is stored in a data store accessible by the packet handler. The control data identifies call participants and the identity of a participant who has currently seized the call. A mobile station capable of video conferencing is operable in a half-duplex video conferencing mode, in which intermittent transmission of video data is controlled by depression of a transmit button.

Dynamic allocation of radio resources in a packet switched communications-system

A public mobile communications network is configured in accordance with an established protocol which includes a private network portion to which only a selected set of mobile stations have access. The selected set of mobile stations has a private network identity code which is different from a public network identity code. A base transceiver station of the private network portion broadcasts the private network identity code on its broadcast control channel. A mobile switching center prevents public subscriber mobile stations from registering via the private network portion, while the private subscriber mobile stations are allowed to register over the entire network.

Mobile communications system having a cellular communications network comprising a public network portion and a private network portion using a common radio interface protocol

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Bristol, United Kingdom

Martin Stubbs