Mobile communication system
AssigneeSony Corporation
InventorKatsutoshi Itoh
Life of this patent
Estimating the term…
Abstract
A communication system to which can be applied site diversity. In this site diversity, different transmitting stations are not synchronized with one another, and signals from plural transmitting stations are received simultaneously. The timing shift produced when signals from plural transmitting stations are received simultaneously is received by a receiving side (S101). When the timing shift has exceeded the allowable range, the communication with the transmitting station is transiently halted (S102 to S106) and, after adjusting the timing on the transmitting side, communication is re-started (S107 to S112) so that the signal reception timings from different base stations will be within an allowable range at all times.
Claims9
A mobile communication system exploiting the site diversity in which signals transmitted asynchronously from a plurality of base stations, controlled by a control station, are received simultaneously by a mobile terminal, wherein
- the base station includes transmission means for transmitting, slot by slot, transmission data comprised of information data and a pilot signal time-multiplexed with respect to said information data, and controlling means for controlling the transmission power of said transmission means based on the reception quality information sent from said mobile terminal;
- said mobile terminal generating the reception quality information based solely on the first pilot signal received to communicate the so generated information to said base station and to the control station.
A mobile communication system exploiting the site diversity in which signals transmitted asynchronously from a plurality of base stations, controlled by a control station, are received simultaneously by a mobile terminal, wherein
- the base station includes transmission means for transmitting, slot by slot, transmission data comprised of information data and a pilot signal time-multiplexed with respect to said information data, and controlling means for controlling the transmission power of said transmission means based on the reception quality information sent from said mobile terminal;
- said mobile terminal including reception quality information transmission means for transmitting, at the next slot, the reception signal intensity information, calculated on synthesizing signals received from the plural base stations.
A mobile communication system exploiting the site diversity in which signals transmitted asynchronously from a plurality of base stations, which are controlled by a control station and which transmit, slot by slot, information data and a pilot signal time-multiplexed with respect to said information data, are received simultaneously by a mobile terminal, wherein
- said mobile terminal includes unusual timing information transmission means for measuring the time difference between the transmission timing and an oncoming signal from each base station, and for notifying, when said time difference has exceeded an allowable range, the information specifying the base station, for which the time difference has exceeded the allowable range, to said base station and to the control station, along with said time difference, as unusual timing information;
- said control station including controlling means for transmitting the setting information to said mobile terminal through each base station and for controlling each base station to control site diversity;
- said control station sending the setting information, from which the base station said mobile terminal has become unable to receive has been excluded, based on said unusual timing information, to said mobile terminal through the base station said mobile terminal is able to receive.
A mobile communication system exploiting the site diversity in which signals transmitted asynchronously from a plurality of base stations, which are controlled by a control station and which transmit, slot by slot, information data and a pilot signal time-multiplexed with respect to said information data, are received simultaneously by a mobile terminal, wherein
- said mobile terminal includes transmission means for measuring the time difference between the transmission timing and the oncoming signal from each base station and for transmitting the measurement report information including each reception signal level and the timing information, along with the information specifying each base station receiving the signals, to said base station and to the control station, and communication control means for performing communication control corresponding to the setting information sent from the control station through said base station;
- said control station including controlling means for sending the setting information through each base station to said mobile terminal based on said measurement report information and for controlling each base station for controlling the site diversity;
- said mobile terminal determining that the base station for which the time difference between the transmission timing and the oncoming signal timing has exceeded the allowable range is unreceivable, and notifies to the control station, by said measurement report information, that the base station for which the time difference has exceeded the allowable range is to be removed from the setting information;
- said control station sending the setting information, from which the base station that cannot be received by said mobile terminal has been removed, through said base station receivable by said mobile terminal to said mobile terminal, based on said measurement report information.
Dependencies are inferred from the claim text.