Percello Ltd.

Broadcom Corporation

Ubiquisys Limited

Broadcom Semiconductors Israel Ltd.

Amir Appel

Rafy Carmon

Sharon Levy

Yoav Volloch

Stephen Whittaker

Alan Carter

A base station can observe downlink communications of neighboring base stations of neighboring cells to determine operational parameters of these neighboring base stations in a process called sniffing. The base station ceases downlink transmission and/or uplink reception and initiates downlink reception for a duration in time and/or over frequency to form a sniffing window to observe the downlink communications of the one or more neighboring base stations. The sniffing window represents an area in time and/or frequency where downlink communications are not transmitted. The base station determines operational parameters based upon the downlink communications of the one or more neighboring base stations that are observed during the sniffing window. The base station and/or the one or more neighboring base stations can adjust their respective operational parameters such that, on average, each of the base stations within the cellular network should have a substantially similar deviation in their operational parameters.

Handover in LTE using parallel sniffer

A method of improving frequency accuracy of a clock unit adapted to clock a femtocell local cellular communication home base station is provided. The method comprising: providing a local cellular communication home base station having an oscillator adapted to operate as a clock therein, wherein at least one cellular communication device is camped thereto, and wherein the at least one camped cellular communication device is further in communication with at least one neighboring cellular communication base station which is associated with an oscillator adapted to operate as a clock therein; periodically applying a derivative operator over periodically obtained local communication parameters and periodically obtained neighboring communication parameters thereby generating derivative communication parameters over time; and correcting the accuracy of the frequency of the clock in the femtocell local cellular communication home base station using the derivative communication parameters over time.

Femtocell handset assisted clock correction

An array of base band processors cooperating for sharing processing power in managing and controlling user equipment traffic in a small cellular communication base station (Femtocell). The base band processors array comprises: a master base band processor; and a plurality of slave base band processors, wherein each base band processor comprise a processing unit, a first layer engine, and communication, control and interface modules providing scalability support functionality, and wherein the processing unit and the first layer engine are arranged in cooperation to manage and control user equipment traffic in the cellular communication base station, and wherein the scalability support functionality is arranged to enable coherent and aligned cooperation between the master base band processor and the plurality of slave base band processors connected thereto. Advantageously the array of base band processors may achieve tight control over base station power consumption, increased range and adjustable number of supported users.

Scalable digital base band processor for cellular base stations

In a cellular communications network, it may be desirable for a large number of basestations to share one or a small number of scrambling codes. When a basestation identifies a desired scrambling code, which is also being used by another nearby basestation, steps are taken such that a location area update is triggered whenever a mobile communications device moves from a coverage area of the nearby basestation into a coverage area of said basestation. Further, the basestation establishes a first cell, using the desired scrambling code, and also establishes a second cell also served by the basestation, using a second scrambling code. By ensuring that mobile devices are preferentially served by the second cell, the possibility of interference with the nearby basestation is reduced.

Growing community of inventors

Kfar-Saba, Israel

Amir Appel