Communication resource management device
A communication resource management device changes the transfer rate of a first control channel related to a first mobile terminal according to a communication condition. The device determines whether there is a frequency band for which it is not determined whether the frequency band is to be used in a predetermined time period based on a current transfer rate of a second control channel related to a second mobile terminal and an amount of data to be transmitted in the second control channel; and allocates, to the first mobile terminal, at least a part of the frequency band for the second control channel with respect to the second mobile terminal in a predetermined period of time. The device changes the transfer rate in the first control channel while maintaining the total frequency band for plural control channels related to plural mobile terminals at a constant value.
1. A method for receiving signals by a mobile terminal used in a mobile communication system having a communication resource managing device managing transmission bands for a plurality of control channels concerning a plurality of mobile terminals including the mobile terminal, the method comprising:
receiving, by the mobile terminal, a control signal that is transmitted by using a first control channel of the plurality of control channels; and
receiving, by the mobile terminal, the control signal that is transmitted by using a second control channel of the plurality of control channels without any prior signal transmission notifying the mobile terminal, wherein
the second control channel has not been used for transmitting the control signal for the mobile terminal a previous time,
the second control channel is transmitted according to a predetermined period,
the second control channel is used for transmitting the control signal for the mobile terminal, which second control channel has been used for transmitting a separate control signal for another mobile terminal of the plurality of mobile terminals at a timing, at a subsequent timing according to the predetermined period, and
an availability of the second control channel for transmitting the control signal for the mobile terminal is determined based on a current transfer rate of the second control channel and an amount of data accumulated for actual transmission in the second control channel.