Patent ID: 8130812
Filing Date: 2012-03-06
Classification: H04B,H04L,H04W

Abstract:
1. A base station for a system where multiple reference signal transmission bandwidths are defined in association with system frequency bands and hierarchical reference signal bandwidths are defined for each of the reference signal transmission bandwidths such that a lower-order reference signal bandwidth lower than a highest-order reference signal bandwidth is a division of a higher-order reference signal bandwidth, the base station comprising: a storage unit configured to store reference signal bandwidth information indicating the hierarchical reference signal bandwidths for each of the system frequency bands; a reference signal transmission bandwidth broadcasting unit configured to select the reference signal bandwidth information corresponding to one of the reference signal transmission bandwidths being used by the base station from the storage unit and to broadcast the selected reference signal bandwidth information; a frequency hopping bandwidth setting unit configured to set a frequency hopping bandwidth for frequency hopping of a reference signal; a reporting unit configured to report, to a user device, the frequency hopping bandwidth and one of the reference signal bandwidths as information on an assigned reference signal transmission bandwidth; a reference signal transmission band setting unit configured to set a reference signal transmission frequency band within the frequency hopping bandwidth based on the reference signal bandwidth information broadcast by the reference signal transmission bandwidth broadcasting unit and the information on the assigned reference signal transmission bandwidth reported by the reporting unit; and a receiving unit configured to receive the reference signal to be transmitted from the user device using the reference signal transmission frequency band set by the reference signal transmission band setting unit.