Ubiquisys Limited

Cisco Technology, Inc.

Discovision Associates

Peter Keevill

Richard Byrne

William Franks

Andrea Giustina

Rajesh S Pazhyannur

James Paul Seymour

Thomas Foxcroft

Raymond Yuk Chor Kwan

Jonathan Parker

Matthew James Collins

David Huw Davies

John Matthew Nolan

Dawood Alam

Justin Gordon Johnstone

Patrick Georges Venceslas Charriere

William Frank

Cristavao Da Silva

An LAA-LTE wireless device obtains data to be transmitted in subframes over a shared spectrum. The wireless device transmits a reservation message over the shared spectrum. The reservation message indicates that an initial synchronization message will be retransmitted a specified number of times at specified intervals, such as with a predetermined number of subframes between each retransmitted synchronization message. The wireless device transmits the initial synchronization message over the shared spectrum.

Synchronization of licensed assisted access long term evolution (LAA-LTE) over shared spectrum

A wireless device accesses a shared spectrum equitably in a self-organizing manner by determining success indices and adjusting courtesy parameters. The wireless device transmits wireless transmissions in a frame subframe structure over a shared spectrum, each of the subframes bounded by subframe boundaries at predetermined time intervals. The success index represents a measure of success in transmitting wireless transmissions in the shared spectrum. The wireless device performs a clear channel assessment to determine whether the shared spectrum is available at the end of the clear channel assessment time interval. The wireless device determines a gap interval between the end of the clear channel assessment time interval and the next subframe boundary and transmits the success index during the gap interval.

Preamble-based channel reservation and self-organized fairness mechanisms for long term evolution (LTE) over shared spectrum

A basestation for a cellular wireless communications network is able to configure itself for operation in the network, by selecting appropriate operating frequencies (in the case of GSM network) or scrambling codes (in the case of a UMTS network), and appropriate transmit powers. This makes it practical for a large number of such basestations to be deployed in a network, within customers' premises, without requiring network intervention in each case.

Self-configuring cellular basestation

This invention relates to a cellular basestation, and in particular to a basestation for a cellular communications network, that can conveniently be used to provide a cellular service, for example within a home or office.

Local area cellular basestation

A basestationprovides coverage for voice and data services within a building using GSM/GPRS and UMTS interfaces within existing networks, allowing use of existing mobile phones. The basestation also provides flexible interfacing to the network operator's core networkvia the Unlicensed Mobile Access (UMA) standards as opposed to the usual Iub (UMTS) or Abis (GSM) interfaces used by conventional cellular basestations. Backhaul from the basestation units is achieved through the use of Digital Subscriber Line (DSL) connections over fixed telephone lines. This approach enables low-cost transport of data and voice using VoIP.

A basestation for cellular wireless communications network is able to configure itself for the operation in the network, by selecting appropriate operating frequencies (in the case of a GSM network) or scrambling codes (in the case of a UMTS network), and appropriate transmit powers. This makes it practical for a large number of such basestations to be deployed in a network, within customers' premises, without requiring network intervention in each case.

A method of managing registration requests from unauthorized user equipments in a cellular communications network includes monitoring such further registration requests and maintaining a count of the total number of registration requests from said user equipment. Based on the counted number of unsuccessful registration requests, different mechanisms can be used to reject the registration request.

Management of unauthorized user equipments in a femto base station environment

A base station for a cellular wireless communications network has a first interface, enabling connection with a remote communications device using a cellular wireless communications protocol in the cellular wireless communications network. The base station also has a second interface, enabling connection over a wide area network, and a third interface, enabling connection over a local area network. Software enables communication over the wide area network between a remote communications device, connected to the first interface, and a core network of the cellular wireless communications network. Software can also enable the remote communications device to communicate with a device in the local area network, or with a server in the wide area network, without using the core network of the cellular wireless communications network.

The invention provides a single chip implementation of a digital receiver for multicarrier signals that are transmitted by orthogonal frequency division multiplexing. Improved channel estimation and correction circuitry are provided. The receiver has highly accurate sampling rate control and frequency control circuitry. BCH decoding of tps data carriers is achieved with minimal resources with an arrangement that includes a small Galois field multiplier. An improved FFT window synchronization circuit is coupled to the resampling circuit for locating the boundary of the guard interval transmitted with the active frame of the signal. A real-time pipelined FFT processor is operationally associated with the FFT window synchronization circuit and operates with reduced memory requirements.

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Bath, United Kingdom

Peter Keevill