Abstract: The present invention relates to communication via a series of bidirectional frames. A communication device is configured to communicate according to a protocol in which data is communicated via a series of frames, and every frame comprises: a downlink portion for transmissions by the communication device, said downlink portion comprising a control portion; and an uplink portion for transmissions to the communication device; and the duration of each frame is greater than one second.

Abstract: A method for synchronising a receiving device with a transmitting device in a wireless communication network comprising forming a synchronisation sequence that has a frequency spectrum comprising peaks at multiple discrete fundamental frequencies, a signal power of the synchronisation sequence being concentrated at those frequencies, and transmitting said synchronisation sequence from the transmitting device to the receiving device.

Abstract: A method for determining the location of a communication terminal in a network comprising a plurality of communication devices, each configured to communicate with at least one terminal, the method comprising instructing the terminal whose location is to be determined to handover from a communication device to which it is currently attached to another communication device in the network.

Abstract: A communication terminal for receiving a communication service from a network that is configured to provide communication services to terminals via a plurality of communication devices, the terminal being configured to receive a communication service from a communication device, receive, from that communication device, a request that it handover from that communication service to another provided by the network and decide, responsive to that request, whether or not to handover from that communication service to another provided by the network.

Abstract: A communications network comprising: multiple base stations, each capable of communicating wirelessly with one or more wireless terminals; and a network core communicatively coupled to the base stations, the network core comprising: a data cache to which base stations can write data received from terminals, accessible from outside the network core in such a way that users external to the network core can write data to the data cache at times that are not scheduled by the network core; and a network controller capable of controlling the operation of the base stations, the network controller being configured to schedule the propagation to the terminals of data stored in the data cache by allocating base station transmission bandwidth for the transmission of the data to one or more of the terminals.

Abstract: A communication device that forms part of a network comprising a plurality of cells, each comprising a communication device configured to communicate with at least one terminal via a frequency hopping sequence associated with its respective cell, the communication device being configured to, responsive to a determination that there are an insufficient number of frequencies available to provide frequency hopping sequences for it and the communication devices in its neighbouring cells that are sufficiently distinct from each other, share the insufficient number of frequencies with of those communication devices on a time division basis.