Patent ID: 7813756
Filing Date: 2010-10-12
Classification: H04W

Abstract:
1. A mobile communication system, comprising a base station having a predetermined communicable area and a user equipment which communicates with said base station if the user equipment belongs to said communicable area, said base station and said user equipment communicating with each other via a common channel commonly used by multiple user equipments and a dedicated channel individually set for each user equipment, said user equipment performing transmission power control for causing a transmission power in said base station to change based on a reception quality of a data transfer channel in the dedicated channel, wherein said user equipment comprises: common channel reception quality measurement means which measures a reception quality of a channel in which a predetermined code is continuously transmitted, among said common channel; stand-alone state detection means which detects whether or not there is a stand-alone communication state in which the data transfer channel in the dedicated channel has not been set and control information is transmitted and received only via a control channel in the dedicated channel; and stand-alone-period transmission power control means which, if said stand-alone communication state has been detected by said stand-alone state detection means, performs transmission power control corresponding to the common channel for causing the transmission power in said base station to change based on the reception quality of the common channel measured by said common channel reception quality measurement means, and wherein said base station changes the transmission power of the dedicated channel with respect to said user equipment, depending on the transmission power control performed by said user equipment.