Motorola Corporation

Rorie O'Neill

Walter Featherstone

Maya Benson

Davood Molkdar

Stephen Aftelak

Jonathan Wallington

An apparatus and method of generating downlink power information for a multi-sector base transceiver site in which power can be shared between existing amplifiers includes a first step of gathering (S) downlink power information for each sector. When the total power required by the sectors is less than the total power available from the base transceiver site, a next step includes modifying (S) the information to pre-empt traffic loading such that a more heavily loaded sector will be disproportionately allocated more power than a less heavily loaded sector. A next step includes forwarding (S, S) the information to controllers of the base transceiver site. A next step includes determining a loading of each sector using thresholds to determine an overload in sectors depending on the information, wherein the power to each sector is adjusted disproportional to the degree with which the sector is loaded.

Radio resource management

A method of allocating timeslots between uplink and downlink communication in a cellular communication system () is described. The method comprises: for consecutive time division multiplex access, TDMA, frames comprising the timeslots, allocating a first selection of the timeslots to uplink communication in each of a plurality of cells () and allocating a second selection of the timeslots to downlink communiction in each of the plurality of cells (); and, when the number of timeslots of each frame to be allocated to uplink communication rather than downlink is different for different cells (), varying the allocation of at least some of the uplink and downlink timeslots in a random or pseudo-random sequence in each cell ().

Allocation of timeslots in a cellular communication system

Communication systems employing subchannel communication such as OFDM or multicode CDMA have a disadvantage of power variation of the transmitted signal. The present invention provides reduced power variation without compromising performance or bandwidth. Information symbols to be transmitted on the individual subchannel are fed to encoders which map the information symbols into channel symbols by increasing their order. The encoding in response to a forward error correction scheme and includes selection between redundant symbol values to reduce power variation. Preferably the encoder includes a trellis coder jointly encoding the symbols and a compensation data set to reduce power variation.

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Swindon, United Kingdom

Rorie O'Neill