Method of assigning a radio channel to a calling mobile body of mobile communication system and radio channel assigning system therefor
First Claim
1. A method of assigning a radio channel to a calling mobile body in a mobile communication system wherein the service area thereof is divided into a plurality of radio zones with adjacent zones overlapped with each other, said mobile communication system comprising a plurality of base stations installed initially to define respective radio zones, each of said base stations including a control channel commonly assigned to all base stations, a plurality of speech channels and a control unit for commonly controlling said speech channels by said control channel, said method comprising the steps of comparing the intensities of signal received by respective base stations, said signal being transmitted from the mobile body, and designating as the radio channel to said calling body an idle speech channel in the base station where said signal has been received with maximum intensity.
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Accused Products
Abstract
The service area of the system is divided into a plurality of overlapping radio zones and a mobile-system base station is installed in each zone. The mobile-system base stations are assigned with a common control channel and each station is assigned with a plurality of speech channels which are commonly controlled by the control channel. Where a mobile body originates a transmission, the intensities of signals received by respective stations which have resulted from a signal transmitted by the mobile body are compared so as to designate an idle speech channel of a station which has received a signal having the maximum intensity among mobile-system base stations including the idle speech channel.
60 Citations
17 Claims
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1. A method of assigning a radio channel to a calling mobile body in a mobile communication system wherein the service area thereof is divided into a plurality of radio zones with adjacent zones overlapped with each other, said mobile communication system comprising a plurality of base stations installed initially to define respective radio zones, each of said base stations including a control channel commonly assigned to all base stations, a plurality of speech channels and a control unit for commonly controlling said speech channels by said control channel, said method comprising the steps of comparing the intensities of signal received by respective base stations, said signal being transmitted from the mobile body, and designating as the radio channel to said calling body an idle speech channel in the base station where said signal has been received with maximum intensity.
- 2. A radio channel assigning system of a mobile communication system wherein the service area thereof is divided into a plurality of radio zones with adjacent zones overlapped with each other, said radio channel assigning system comprising a plurality of base stations installed initially to define respective radio zones, each of said base stations including at least one control channel commonly assigned to all base stations, a plurality of speech channels and a control unit for commonly controlling said speech channels by at least one common control channel, said control unit including means for comparing the intensities of signals transmitted from a mobile body and received by respective base stations and means for designating an idle speech channel of a base station which has received the signal having the maximum intensity among base stations having an idle speech channel.
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16. A radio channel assigning system of a mobile communication system wherein the service area thereof is divided into a plurality of radio zones with adjacent zones overlapped with each other, said radio channel assigning system comprising a plurality of base stations installed in respective ones of said plurality of radio zones, each of said base stations including a control channel commonly assigned to respective base stations, a plurality of speech channels, and a control unit for commonly controlling said speech channels by said control channel, said control unit including means for comparing the intensities of the signals transmitted from a mobile body and received by respective base stations, means for determining a base station which has received a signal having the maximum intensity, means for designating an idle speech channel of the base station thus determined, means for determining another base station which has received a signal having an intensity next to the maximum where there is no available idle speech channel in the first selected base station, and means for designating an idle speech channel of said another base station.
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17. A radio channel assigning system of a mobile communication system wherein the service area thereof is divided into a plurality of radio zones with adjacent zones overlapped with each other, said radio channel assigning system comprising a plurality of base stations installed in respective radio zones including a control channel commonly assigned to respective base stations, a plurality of speech channels, and a control unit for commonly controlling said speech channels by said control channel, said control unit including memory means for storing data representative of intensities of signals transmitted by a mobile body and received by respective base stations, means responsive to the data stored in said memory means for sequentially searching said base stations starting from a station which has received a signal having the maximum intensity until an idle speech channel is found.
Specification