Patent ID: 9031593
Filing Date: 2015-05-12
Classification: H04B,H04W

Abstract:
1. A method for determining data enabling a plurality of base stations to time their transmissions to a mobile station within a timing range, the method comprising the steps of: obtaining, in the mobile station, time delays of transmissions from each of the plurality of base stations in reaching the mobile station, wherein the plurality of base stations includes a primary base station and one or more secondary base stations; determining, in the mobile station, time delay differences between the time delays and a reference time delay, wherein the reference time delay is associated with the primary base station transmission and the time delays comprise time delays of the secondary base station transmissions; transmitting the time delay differences from the mobile station to the plurality of base stations via at least one link that is specific to the mobile station in order to enable the timing of transmissions by the base stations to be corrected, wherein the mobile station transmits the time delay differences using a reference signal, and wherein the step of transmitting the time delay differences further comprises the steps of: wherein the reference signal includes a constant amplitude zero autocorrelation sequence, the adjustment factor comprises an angular adjustment factor corresponding to the determined time delay difference, and the step of applying the adjustment factor comprises shifting the reference signal for at least one secondary base station with an angle comprising the corresponding angular adjustment factor.