Patent ID: 9078204
Filing Date: 2015-07-07
Classification: H04W

Abstract:
1. A base station comprising: an obtaining unit that obtains, from another base station that communicates with a mobile device, a propagation delay amount between the other base station and the mobile device; and an instructing unit that, when a propagation delay amount between the base station and the mobile device which is based on the propagation delay amount obtained by the obtaining unit is present within a predetermined range along a forward direction of a time axis from a boundary at the beginning of a detecting window that is used in detecting a preamble sequence transmitted from the mobile device, instructs the mobile device to stop the transmission of the preamble sequence corresponding to another detecting window which lies, in a backward direction of the time axis, adjacent across the boundary at the beginning of the detecting window and that, when the propagation delay amount is present within the predetermined range along the backward direction of the time axis from a boundary at the end of the detecting window, instructs the mobile device to stop the transmission of the preamble sequence corresponding to another detecting window which lies, in the forward direction of the time axis, adjacent across the boundary at the end of the detecting window.