Method of assigning radio communication channels to each of a plurality of mobile stations

Claim 1

A method of assigning mobile radio communication channels to a plurality of mobile stations (21, 22) and a plurality of base stations (19, 20) arranged in a service area, said base stations constituting a radio zone where the base stations are connected to the mobile stations for communication, wherein each of said base stations includes a plurality of radio communication channels used for communication between the base station and the mobile station, said radio communication channels being divided into a plurality of channel groups, each channel group having a predetermined lower limit value of a reception electric field level of a received signal, which lower limit value is necessary for communication between the mobile station and the base station, and a radio control channel used for transmission of control information at the time other than the communication time, said method is characterized by: a first step of determining whether or not a reception electric field level for communication, which is found from a reception electric field level of a reception signal of said radio control channel between the mobile station (21, 22) issuing a communication connection demand and the base station (19, 20) within the radio zone, belongs to a channel group which meets a predetermined lower limit value of the reception electric field level, thereby finding a radio communication channel to be assigned in response to the communication connection demand issued within the radio zone; a second step of determining whether or not said radio communication channel belongs to the channel group which meets the lower limit value of the reception electric field level for communication, and satisfies a threshold of the ratio of desired wave power to interference wave power (D/U) when the communication connection demand is generated; and a third step of assigning the radio communication channel determined and selected in said first and second steps to the mobile station and the base station, the commu'nication connection between which is requested.

Claim 2

A method of assigning mobile radio communication channels to a plurality of mobile stations (21, 22) and a plurality of base stations (19, 20) arranged in a service area, said base stations constituting a radio zone where the base stations are connected to the mobile stations for communication, wherein each of said base stations includes a plurality of radio communication channels used for communication between the base station and the mobile station, said radio communication channels being divided into a plurality of channel groups, each channel group having a predetermined lower limit value of a reception electric field level of a received signal, which lower limit value is necessary for communication between the mobile station and the base station, and a radio control channel used for transmission of control information at the time other than the communication time, said method is characterized by: a first step of determining whether or not a reception electric field level for communication, which is found from a reception electric field level of a reception signal of said radio control channel between the mobile station (21, 22) issuing a communication connection demand and the base station (19, 20) within the radio zone, belongs to a channel group which meets a predetermined lower limit value of the reception electric field level, thereby finding a radio communication channel to be assigned in response to the communication connection demand issued within the radio zone; a second step of determining whether or not said radio communication channel belongs to the channel group which meets the lower limit value of the reception electric field level for communication, and satisfies a threshold of the ratio of desired wave power to interference wave power (D/U) when the communication connection demand is generated; and a third step of assigning the radio communication channel determined and selected in said first and second steps to the mobile station and the base station, the commu'nication connection between which is requested.