Abstract: Techniques and mechanisms relating to a basestation for a cellular communication system, and in particular to a method and a system for determining the location of the basestation, are disclosed. Methods are provided for use in a basestation of a mobile communications network, or in the network itself, for determining information about the position of the basestation itself, and/or for determining the position of mobile devices having a connection to the basestation. According to other aspects of the invention, there are provided basestations and network nodes for performing these methods.

Abstract: A base station for use in a mobile communications network includes a frequency synthesizer for generating signals at desired frequencies and a packet data interface for transmitting and receiving packet data signals over a wide area network. The basestation is configured to determine an elapsed time since it last synchronized the frequency synthesizer to a master device. The basestation is also configured to request synchronization packet data signals from the master device when the elapsed time exceeds a predetermined holdover period.

Abstract: Techniques and mechanisms relating to a basestation for a cellular communication system, and in particular to a method and a system for determining the location of the basestation, are disclosed. Methods are provided for use in a basestation of a mobile communications network, or in the network itself, for determining information about the position of the basestation itself, and/or for determining the position of mobile devices having a connection to the basestation. According to other aspects of the invention, there are provided basestations and network nodes for performing these methods.

Abstract: Techniques and mechanisms relating to a basestation for a cellular communication system, and in particular to a method and a system for determining the location of the basestation, are disclosed. Methods are provided for use in a basestation of a mobile communications network, or in the network itself, for determining information about the position of the basestation itself, and/or for determining the position of mobile devices having a connection to the basestation. According to other aspects of the invention, there are provided basestations and network nodes for performing these methods.

Abstract: Techniques and mechanisms relating to a basestation for a cellular communication system, and in particular to a method and a system for determining the location of the basestation, are disclosed. Methods are provided for use in a basestation of a mobile communications network, or in the network itself, for determining information about the position of the basestation itself, and/or for determining the position of mobile devices having a connection to the basestation. According to other aspects of the invention, there are provided basestations and network nodes for performing these methods.

Abstract: A base station for use in a mobile communications network may include a frequency synthesizer for generating signals at desired frequencies and a packet data interface for transmitting and receiving packet data signals over a wide area network. The basestation is adapted to determine an elapsed time since it last synchronized the frequency synthesizer to a master device. The basestation is also adapted to request synchronization packet data signals from the master device when the elapsed time exceeds a predetermined holdover period.

Abstract: A basestation, for example a femtocell basestation for use in a mobile communications network, has a frequency synthesizer, for generating signals at desired frequencies, and also has a wireless communications interface, for transmitting and receiving signals in the mobile communications network. The femtocell basestation also has a packet data interface, for transmitting and receiving packet data signals over a wide area network.

Abstract: A basestation for a cellular communication system is intended for purchase and deployment by a customer, rather than by the network operator. After installation, the position of the basestation is determined by detecting signals transmitted by neighbouring basestations. By detecting a position relative to multiple neighbouring basestations, the location of the basestation can be determined to a sufficient degree of accuracy.

Abstract: A method for synchronising a clock signal in a basestation of a wireless telecommunications system is described. The basestation has a reference clock signal and is operable to communicate with wireless mobile terminals and with a packet switched network. The method comprises detecting a radio frequency clock synchronisation signal from a wireless telecommunications network, and synchronising the reference clock signal of the basestation in dependence upon the detected radio frequency clock synchronisation signal.

Abstract: This invention relates to a method and apparatus for allocating a device address to a communication device and/or transmitting data to a communication device having a device address. A mobile communication device assigns itself a device address by performing the step of determining (301,303) the device address at least partly in response to a position of the mobile communication device. A base station (209) transmits data to the mobile communication device by performing the steps of determining (401) a target location area (211); and then transmitting (405) the data using the device address. The invention is particularly applicable to cellular communication systems.

Abstract: A packet transmission system comprising a network of one or more nodes (1) each comprising a number of inputs connected via packet switching means to a number of outputs each of which has storage means (11) associated with it in which to store a queue of packets to be outputted; characterized in that each node (1) is provided with timer means (14) to measure the time each packet spends in a queue of said storage means (11); and stamping means (12) to add to a time stamp field (TS) of each packet before it is outputted from the node, the time the packet has spent in a queue as measured by the timer means (14).

Abstract: A packet transmission system in which variable delays are compensated for by packetizing an input signal so as to produce packets at a predetermined packet frequency (3), allocating a sequence number to each packet (6), transmitting these packets over a network to an endpoint (7), and forming the packets into an output signal at the endpoint by reference to their sequence number (12) and by delaying each as necessary (9, 10) so that they are all delayed by substantially the same predetermined delay time with reference to the packet frequency. Preferably, the delay in the transmission of each packet through the network is measured by comparison of the time of arrival of the packet at the endpoint relative to a timing signal (11) synchronized with or running plesiochronously with the predetermined packet frequency.

Abstract: A system in which core information, for example in the form of a core block or blocks (C), is transmitted in a core packet (PC), and at least some enhancement information, for example, in the form of enhancement blocks (E), is transmitted in an enhancement packet (PE) which is separate from the core packet (PC) and is discardable to relieve congestion. Preferably, the core and enhancement packets have headers (H) which include a discard eligible marker (DE) to indicate whether or not the associated packet can be discarded. The enhancement blocks (E) may be distributed between the core packet and enhancement packet in accordance with congestion conditions, or the enhancement blocks may be incorporated only in the enhancement packet, and the actual number of enhancement blocks included are varied depending on congestion conditions.