Patent ID: 7783295
Filing Date: 2010-08-24
Classification: H04L,H04W

Abstract:
1. A call admission control device in a mobile communication system including n mobile stations performing communications using a shared channel and m mobile stations performing communications using a dedicated channel, where n is an integer of 2 or more and m is an integer of 2 or more, the device comprising: radio channel quality acquisition means for acquiring a value indicating a radio channel quality of the n mobile stations performing communications using the shared channel; target transmission data rate setting means for setting a target transmission data rate of the n mobile stations performing communications using the shared channel; necessary transmission power calculation means for calculating necessary transmission power for the n mobile stations performing communications using the shared channel to satisfy the target transmission data rate based on the value indicating the radio channel quality of the n mobile stations performing communication using the shared channel and the target transmission data rate; initial transmission power setting means for setting initial transmission power of a mobile station which newly starts communications using a dedicated channel; dedicated channel transmission power acquisition means for acquiring transmission power of the m mobile stations performing communications using the dedicated channel; and new mobile station admission means for controlling admission of a call from a mobile station to newly start performing communications using the dedicated channel, based on a comparison result between a predetermined threshold value and a sum of: a total value of the transmission power of a common channel; the necessary transmission power for the n mobile stations performing communication using the shared channel to satisfy the target transmission data rate; the initial transmission power of the mobile station to newly start communications using the dedicated channel; and the transmission power of the m mobile stations performing communications using the dedicated channel; wherein the value indicating the radio channel quality is a data amount which is estimated from radio quality of a downlink, and a power resource and a code resource in the downlink that the data amount can be transmitted at a predetermined error rate.