Method and system for facilitating timing of base stations...

Details Method and system for facilitating timing of base stations... Method and system for facilitating timing of base stations...

H - Electricity

04

W

H04W 56/00 (2009.01) H04W 36/00 (2009.01) H04W 48/16 (2009.01) H04W 36/18 (2009.01) G01S 5/06 (2006.01) G01S 5/10 (2006.01)

Patent

CA 2603277

A method for estimating relative timing of base stations in an asynchronous mobile communications system comprises receiving at a first mobile station first and second downlink signals transmitted by first and second base stations; transmitting an uplink signal from the first mobile station to the first and second base stations; and calculating estimated relative time difference between the time bases of the first and second base stations using receive times at the first and second base stations of said uplink signal, transmit times of the first and second downlink signals, and a time difference at the first mobile station between a receive time of the second downlink signal and the transmit time of said uplink signal to account for propagation delays between first and second mobile stations.

Une méthode pour estimer la synchronisation relative de stations de base dans un système de communication mobile asynchrone comprend la réception à une première station mobile d'un premier et d'un deuxième signaux de liaison descendante transmis par la première et la deuxième stations de base; la transmission d'un signal de liaison ascendante de la première station mobile à la première et à la deuxième stations de base; le calcul de la différence de synchronisation relative estimée entre les bases de synchronisation de la première et de la deuxième stations de base en ayant recours aux temps de réception dudit signal de liaison ascendante à la première et à la deuxième stations de base, aux temps de transmission du premier et du deuxième signaux de liaison descendante, et à la différence de synchronisation à la première station mobile entre le temps de réception du deuxième signal de liaison descendante et le temps de transmission dudit signal de liaison ascendante afin de tenir compte du temps de propagation entre la première et la deuxième stations mobiles.

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