Radiant Networks Plc

Plextek Limited

Intel Corporation

Bayer Cropscience Gmbh

Telensa Holdings Limited

Timothy Jackson

Philip T Hughes

James Newman

Esen Bayar

Timothy David Howe

Mehul Rasikchandra Amin

Peter Dominic Riordan

Peter Massam

Philip Alan Bowden

Stephen Field

Peter David Massam

A network includes a first transceiving station and a further transceiving station. In one arrangement the data is transmitted from the first transceiving station to the second transceiving station according to a frame structure having a payload portion for payload data and a synchronization portion for synchronization data. The frame structure is selected from candidate frame structures having differing durations of the synchronization portion, according to a data loading factor which depends on the amount of data that is required to be transmitted. The payload capacity may be optimised by reducing the duration of the synchronization portion when a large amount of data is required to be transmitted.

Method and device for selecting and transmitting variable frame formats

In the sending of data in a network from a sending node to a receiving node via a relay node, the receiving node sends a notification arranged to notify both the sending node and receiving node of receipt of data at the receiving node. Notifications acknowledge that the data has been correctly received over each individual stage of transmission, and further acknowledge to the sending node that data has been correctly transmitted over the whole transmission path and received at the receiving node. The burden on the network of sending acknowledgments is reduced while notifications of data transmission over single stages and over the whole transmission path are provided.

Data acknowledgement apparatus and method

An RF receiver comprises a signal processor arranged to perform a method of decoding data contained within a signal that comprises a set of slots, at least one said slot comprising a preamble portion and a payload portion and being transmitted at a predetermined transmission frequency. The signal processor is arranged to perform a first process to derive timing data from the preamble portion and perform a second process to extract information from the payload portion, the second process being triggered from said timing data derived from the first process. The preamble portion comprises at least a first sequence of data and a second sequence of data, and the second sequence is the inverse of the first sequence. In preferred embodiments the first process comprises identifying a transition between said first and second sequences of data and deriving said timing data from the identified transition.

Narrow band receiver

Communications apparatus has a plurality of nodes each of which is capable of communicating with plural other nodes via point-to-point wireless transmission links between the nodes. At least one of the nodes has at least one antenna that is steerable in azimuth. The antenna is arranged to transmit an electromagnetic beam that has a beam width that is narrower in azimuth than in elevation. The beam width in azimuth is less than 9&#xb0; and the beam width in elevation is less than about 15&#xb0;.

Communication apparatus, method of transmission and antenna apparatus

A communications system () includes a plurality of nodes (). Each node () has receiving means for receiving a signal transmitted by wireless transmitting means; transmitting means for wireless transmission of a signal; and, means for determining if a signal received by said node () includes information for another node () and causing a signal including said information to be transmitted by said transmitting means to another node () if said received signal includes information for another node (). Each node () has one or more substantially unidirectional point-to-point wireless transmission links (). At least some of the nodes () have plural substantially unidirectional point-to-point wireless transmission links (). Each of said links () is to one other node () only. The links () are arranged such that at least some of the nodes () are not linked only to the nearest neighbor node(s) ().

Communications system and method

A communications system () includes a plurality of nodes (). Each node () has receiving means for receiving a signal transmitted by wireless transmitting means; transmitting means for wireless transmission of a signal; and, means for determining if a signal received by said node () includes information for another node () and causing a signal including said information to be transmitted by said transmitting means to another node () if said received signal includes information for another node (). Each node () has one or more substantially unidirectional point-to-point wireless transmission links (). At least some of the nodes () have plural substantially unidirectional point-to-point wireless transmission links (). Each of said links () is to one other node only (). Each node () is arranged such that transmission or reception of a signal at any particular frequency by a node () takes place on only one link () at a time.

A communications system () includes a plurality of nodes (). Each node () has receiving means for receiving via an antenna () a signal transmitted by wireless transmitting means; transmitting means for wireless transmission of a signal via an antenna (); and, means for determining if a signal received by said node () includes information for another node () and causing a signal including said information to be transmitted by said transmitting means to another node () if said received signal includes information for another node (). Each node () has one or more substantially unidirectional point-to-point wireless transmission links (). At least some of the nodes () have plural substantially unidirectional point-to-point wireless transmission links () which share at least one of a receiver () of the receiving means and a transmitter () of the transmitting means. Each of the links () is to one other node () only. At least some of the nodes () are the origination and termination point of user traffic.

A support structure () for supporting a plurality of antennas () has a plurality of antenna supports () each for supporting at least one antenna (). Each antenna support () is supported for rotation about an axis of rotation. At least one antenna support () is selectively rotatable with respect to the or each other antenna support () such that an antenna () supported by said at least one antenna support () rotates therewith.

Support structure for antennas, transceiver apparatus and rotary coupling

Process for the preparation of 2-cyanopyridines

A communications system ( ) has a plurality of nodes ( ). Each node ( ) has a receiver ( ) for receiving a signal transmitted by wireless transmitting means and a transmitter ( ) for wireless transmission of a signal. Each code ( ) further has means for determining if a signal received by said node ( ) includes information for another node and causing a signal including said information to be transmitted by said transmitting means to another node if said signal includes information for anode node. Each node ( ) has a substantially unidirectional point-to-point wireless transmission link ( ) to at least one other node. The communications system ( ) has high spectral efficiency compared to a broadcast cellular system and allows high data transfer rates to be achieved.

Growing community of inventors

Cambridge, United Kingdom

Timothy Jackson