Abstract: A method (300) for carrying out a security procedure with a mobile station, where a hybrid cellular telecommunication system communicates with a mobile station (301) and the hybrid cellular telecommunication system communicates with a cellular network (308). The method is characterized in that the cellular network carries out the security procedure with the mobile station, the data related to the security procedure is transferred between the cellular network and the mobile station via the hybrid cellular telecommunication system, and the decision of triggering the security procedure of the cellular network is made outside the cellular network (309). The invention also relates to a network element (510) in the hybrid cellular telecommunication system that triggers the security procedure and to a network element (500) in the cellular network that carries out the security procedure after receiving a triggering signal.

Abstract: A frequency setting unit for a radio telecommunications network comprising a first, reference base station transmitting signals at a first frequency, and a second base station transmitting at a second frequency; the frequency control unit comprising: a radio receiver for receiving signals from the first base station; analysis apparatus for analysing the received signals to determine the first frequency; and feedback apparatus responsive to the decoding apparatus and coupled to the second base station for adjusting the second frequency with the aim of establishing a desired relationship between the second frequency and the first frequency.

Abstract: A network for communicating with a plurality of radiotelephones via respective communication channels over timeslots on a carrier, wherein the channels can operate at a first or second data rate such that a timeslot on the carrier can transmit a single communication channel operating at the first data rate or two communication channels operating at the second data rate, the network comprising a controller responsive to a predetermined condition for initiating a change in the data rate of two channels transmitted on separate timeslots from the first data rate to the second data rate.

Abstract: A communications system includes a subnetwork connected to a network. The network has a first part and a second part, with the first and second parts being connected so that a first user can communicate with a second user. The first user is able to move within the respective part of the system. The subsystem includes a gateway for permitting communications between first and second parts. The gateway includes a register for storing information associating the first and second users, and for storing information relating to the current location of the first user so that information from the second user can be directed to the first user.

Abstract: A method of transmitting voice over IP (VoIP) in a wireless telecommunications system comprising at least one wireless mobile station, a first radio access gateway and a second radio access gateway. Address information of the second radio access gateway is defined in the first radio access gateway, if a need is detected to hand over the connection of the mobile station from a base station connected to the first radio access gateway to a base station connected to the second radio access gateway. Address information of the first radio access gateway is defined in the second radio access gateway. Data addressed to and transmitted from the mobile station is transferred through the first radio access gateway and the second radio access gateway when the handover has been performed to the base station connected to the second radio access gateway.

Abstract: An access control system for a wireless telecommunications system comprising: a first base station serving a first site and operable as part of a first wireless telecommunications network; a second base station serving a second site and operable as part of a second wireless telecommunications network; the first and second telephone networks being connected together, whereby a call can be connected between the first base station and the second base station via the first wireless telecommunications network and the second wireless telecommunications network; and the access control system comprising: a data link of which use is restricted between the first network and the second network, whereby a call may be connected between the first network and the second network; and a first site link access control unit comprising a database for storing identities of wireless terminals at the second site for permitting calls to such terminals made at the first site to be routed from the first site to the second site over th

Abstract: A method of handing off a mobile station (MS B) from an internal cellular communications network to an external cellular communications network having a network controller, the method comprising: allocating at least one cell of the internal cellular network as a border cell (E); detecting the movement of said mobile station (MS B) into said border cell (E); generating an advance hand-off request in accordance with a prediction algorithm which uses a set of predetermined parameters associated with said mobile station (MS B) and determines when a hand-off is likely to be required; and responsive to said advance hand-off request setting up a communication channel in the external cellular communications network for use by said mobile station (MS B) when an actual hand-off request is made, wherein said external network and said internal network is a packet switched network.

Abstract: The invention relates to a method for informing application properties by an object exchange protocol. Properties of an application to be stored are determined as property information as a response to an addition or modification of the application in the data processing device. The property information is stored to a pre-determined storage for dynamic property information in the data processing device. The property information is retrieved from the pre-determined storage when there is a need to obtain property information for object exchange purposes for a requesting entity. The property information may be transmitted to the requesting entity by the object exchange protocol.

Abstract: A method of transmitting voice over IP (VOIP) in a wireless telecommunications system comprising at least one wireless mobile station, a first radio access gateway and a second radio access gateway. Address information of the second radio access gateway is defined in the first radio access gateway, if a need is detected to hand over the connection of the mobile station from a base station connected to the first radio access gateway to a base station connected to the second radio access gateway. Address information of the first radio access gateway is defined in the second radio access gateway. Data addressed to and transmitted from the mobile station is transferred through the first radio access gateway and the second radio access gateway when the handover has been performed to the base station connected to the second radio access gateway.

Abstract: An access control system for a wireless telecommunications system comprising: a first base station serving a first site and operable as part of a first wireless telecommunications network; a second base station serving a second site and operable as part of a second wireless telecommunications network; the first and second telephone networks being connected together, whereby a call can be connected between the first base station and the second base station via the first wireless telecommunications network and the second wireless telecommunications network; and the access control system comprising: a data link of which use is restricted between the first network and the second network, whereby a call may be connected between the first network and the second network; and a first site link access control unit comprising a database for storing identities of wireless terminals at the second site for permitting calls to such terminals made at the first site to be routed from the first site to the second site over th

Abstract: A method (400) for controlling calls to and from a mobile station reachable via a hybrid cellular telecommunication system, where said mobile station is the first endpoint of a call, is characterized in that a set of allowed location areas is defined (402). Further, the location area of another endpoint of the call is determined (407), and decision about connecting the call via the hybrid cellular telecommunication system is made (408) based at least on the location area of said other endpoint. Arrangements (600, 610) implementing the method are also presented.

Abstract: A network for communicating with a plurality of radiotelephones via respective communication channels over timeslots on a carrier, wherein the channels can operate at a first or second data rate such that a timeslot on the carrier can transmit a single communication channel operating at the first data rate or two communication channels operating at the second data rate, the network comprising a controller responsive to a predetermined condition for initiating a change in the data rate of two channels transmitted on separate timeslots from the first data rate to the second data rate.

Abstract: The invention relates to a method for the manufacture of optical couplers, comprising the steps of (a) removing the jacket material over a short distance from two or more optical fibres, (b) bringing the jacketless portions of the optical fibers in contact with each other, (c) fusing the optical fibers together within the contact area and drawing them into tapers. In order that the process would be simpler and easier to control, the method according to the invention is characterized in that the optical fibers are fused by heating them by means of an arc substantially parallel to the optical fibers. The arc is excited in a chamber confined in the direction of the radius of the fibers, and it is excited and extinguished at a low frequency so that the arc strikes at arbitrarily varying points around the fibers.