RADIO COMMUNICATION SYSTEM, BASE STATION, AND CONTROL METHOD THEREOF

摘要

A radio communication system 1 according to an embodiment comprises: a pico cell base station PeNB provided in a communication area of a macro cell base station MeNB and having transmission power lower than transmission power of the macro cell base station MeNB. A resource division ratio is determined with respect to radio resources to be usable as a PDSCH, indicating a ratio of macro cell unusable PDSCH resources and macro cell usable PDSCH resources. The radio resources are assigned to a radio terminal connected to the macro cell base station MeNB, out of the macro cell usable PDSCH resources determined according to the determined resource division ratio. The resource division ratio is determined according to expected throughputs of each of cell edge terminals of the macro cell base station MeNB and the pico cell base station PeNB.

主权项

1. A radio communication system comprising a first base station and a second base station, wherein a radio frame of the radio communication system includes plural subframes, each subframe is formed by two consecutive time slots, each subframe includes plural resource blocks in frequency domain, and each resource block is formed by plural subcarriers,
the first base station comprising: a controller that determines a subframe arrangement formed by at least one first subframe and at least one second subframe in which transmission power of the first base station is limited to low compared with the at least one first subframe, and sets the subframe arrangement to the first base station, when a cell coverage of the second base station is extended; and a receiver that receives information on resource block use rate in the second base station, from the second base station, wherein the controller modifies the subframe arrangement at least based on the information on resource block use rate.