Abstract: A mobile station (4) in a satellite mobile telephone system predicts when it will move into another cell on the basis of one set of broadcast information thereby reducing the overall processing burden. The mobile station (4) can predict with a useful degree of certainty which broadcast control channel (BOCH) frequencies it should listen on when it wakes up on the basis of a stored map of the relative positions of cells. The broadcast information is valid for a predetermined time interval. Upon waking up, the mobile station (4) determines present time within the predetermined time interval and uses the broadcast information as well as the present time within the predetermined time interval to predict the time at which the mobile telephone will leave the cell.

Abstract: A mobile station (4) in a satellite mobile telephone system predicts when it will move into another cell on the basis of one set of broadcast information thereby reducing the overall processing burden. The mobile station (4) can predict with a useful degree of certainty which broadcast control channel (BCCH) frequencies it should listen on when it wakes up on the basis of a stored map of the relative positions of cells. The broadcast information includes information about the current cell's (40) shape (V1, V2, V3, V4, V5, V6) and translational (T) and rotational (R) motion.

Abstract: A method of reusing frequency bands between base stations of a terrestrial mobile communications network and a satellite communications network, comprising allocating the frequency bands using integrated resource management and other mitigation techniques in a such a way as to minimise interference between both the systems, thus making optimum usage of valuable frequency spectrum.

Abstract: A method of reusing frequency bands between base stations of a terrestrial mobile communications network and a satellite communications network, comprising allocating the frequency bands using integrated resource management and other mitigation techniques in a such a way as to minimise interference between both the systems, thus making optimum usage of valuable frequency spectrum.

Abstract: A method of reusing frequency bands between base stations of a terrestrial mobile communications network and a satellite communications network, comprising allocating the frequency bands using integrated resource management and other mitigation techniques in a such a way as to minimise interference between both the systems, thus making optimum usage of valuable frequency spectrum.

Abstract: A mobile station (4) in a satellite mobile telephone system predicts when it will move into another cell on the basis of one set of broadcast information thereby reducing the overall processing burden. The mobile station (4) can predict with a useful degree of certainty which broadcast control channel (BCCH) frequencies it should listen on when it wakes up on the basis of a stored map of the relative positions of cells. The broadcast information includes information about the current cell's (40) shape (V1, V2, V3, V4, V5, V6) and translational (T) and rotational (R) motion.

Abstract: A mobile station (4) in a satellite mobile telephone system predicts when it will move into another cell on the basis of one set of broadcast information thereby reducing the overall processing burden. The mobile station (4) can predict with a useful degree of certainty which broadcast control channel (BCCH) frequencies it should listen on when it wakes up on the basis of a stored map of the relative positions of cells. The broadcast information includes information about the current cell's (40) shape (V1, V2, V3, V4, V5, V6) and translational (T) and rotational (R) motion.

Abstract: A method of reusing frequency bands between base stations of a terrestrial mobile communications network and a satellite communications network, comprising allocating the frequency bands using integrated resource management and other mitigation techniques in a such a way as to minimize interference between both the systems, thus making optimum usage of valuable frequency spectrum.

Abstract: A mobile station (4) in a satellite mobile telephone system predicts when it will move into another cell on the basis of one set of broadcast information thereby reducing the overall processing burden. The mobile station (4) can predict with a useful degree of certainty which broadcast control channel (BCCH) frequencies it should listen on when it wakes up on the basis of a stored map of the relative positions of cells. The broadcast information includes information about the current cell's (40) shape (V1, V2, V3, V4, V5, V6) and translational (T) and rotational (R) motion.

Abstract: In a communication system, a base station (1) transmits to a mobile station (5) in different channels. One channel is relayed to the mobile station (5) by a first satellite (3) and the other is relayed by a second satellite (4). The mobile unit (5) compares the qualities of the signals relayed by the satellites (3, 4) and transmits back to the base station (1) using the satellite (3,4) providing the best quality signals. The use of satellite links is not essential. The system has the advantages of diversity communication without increasing power demand at the mobile station.

Abstract: Internet access is provided to passengers in a vehicle such as an aircraft through a proxy server (10) which has access terminals (T1-n) for passengers' lap top computers or personal organisers (UT1-n). The proxy server (10) can be connected through a satellite link (2, 3) to a ground-based land station (5) connected to the Internet. In order to minimise use of the wireless link (2, 3), the proxy server, whilst the aircraft is in transit, is loaded with most frequently used web pages from a ground-based server (15), connected through terminals (14, 16) and a wired link (13). The downloaded web pages may be selected according to the destination of the journey. E-mail messages produced by the passengers may be temporarily stored until the aircraft lands and then downloaded to the server (15) for onward transmission.

Abstract: A mobile station in a satellite mobile telephone system predicts when it will move into another cell on the basis of one set of broadcast information thereby reducing the overall processing burden. The mobile station can predict with a useful degree of certainty which broadcast control channel (BCCH) frequencies it should listen on when it wakes up on the basis of a stored map of the relative positions of cells. The broadcast information includes information about the current cell's shape and translational and rotational motion.

Abstract: In a telephone system providing a voice mail service, a subscriber's voice mail follows the subscriber as he moves. In, for example, a satellite mobile telephone system, a subscriber may roam over wide areas. As he does so he registers sequentially with different satellite access nodes. These nodes may be on different continents. When the subscriber registers with a new satellite access node, the contents of his previous voice mailbox are transferred to a new voice mail box at the new satellite access node. The subscriber's home location register record and the visitor location register record, at the new node, are updated with the number of the new voice mailbox, so that new voice mail can be routed to the correct mailbox.