Radio communication system having a base unit control for establishing wire-line connections for calls from mobile units and for displaying any wait status for such calls
First Claim
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1. A radio communication system comprising:
- a plurality of mobile units that are movable to any place, the mobile units having respective identification data; and
a base unit fixedly installed at a predetermined installation place, having a predetermined radio communication service area in the vicinity of the installation place and being connectable to a public telephone network through at least one public telephone line, the base unit being connectable through a radio channel to any one of the plurality of mobile units,wherein the mobile units are connected via a radio channel to the base unit by issuing a calling request to the base unit within the radio communication service area of the base unit so as to communicate with the public telephone network through the public telephone line,wherein the base unit comprises;
calling request receiving means for receiving a calling request when the calling request is issued from one of the mobile units within the radio communication service area of the base unit; and
connection control means for receiving a calling request when the calling request is issued from one of the mobile units within the radio communication service area of the base unit, the connection control means including registering means for, when said at least one public telephone line is idle, connecting said one mobile unit, which issued the calling request, to the public telephone network through the idle public telephone line, and for, when said at least one public telephone line is busy, registering identification data of said one mobile unit, which issued the calling request, as a mobile unit in a calling request wait state in the registering means and for transmitting wait data indicative of the wait state of calling request by said one mobile unit, andwherein each of the mobile units comprises;
calling request transmitting means for transmitting a calling request to the base unit using a calling operation;
registration changing means for transmitting a registration confirming signal to mobile units registered in the registering means and, when a response signal to the registration confirming signal is not issued from one of the registered mobile units, erasing the registration of the one registered mobile unit which does not issue the response signal;
means for transmitting a changed registration signal indicative of a new registration content as changed by the registration changing means;
display means for displaying the wait state of calling requests upon receipt of the wait data from the base unit; and
display control means for displaying the changed registration content on the display in response to the reception of the changed registration signal,wherein the connection control means responds to the registering means to establish a connection from a waiting mobile unit through the one public telephone line connected to the base unit, when the one public telephone line becomes idle upon disconnection of the one mobile unit through the base unit, andwherein the wait data comprises numerical data, and the registration changing means subtracts one from the numerical data when erasing the registration of the one registered mobile unit, the changed registration signal transmitting means transmits the numerical data subtracted by one.
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Abstract
A radio telephone system which includes a plurality of stationary base units connected to wire lines, a plurality of portable or mobile units to be coupled through spatial radio circuits to the plurality of base units, and a method of controlling the system. In the radio telephone system, users of the respective mobile units can know the busy states of the associated wire lines. When the base unit cannot accept a calling request issued from the associated mobile unit due to the busy state of the base unit, the base unit transmits to the mobile unit a data indicative of the busy state of the associated wire line to display an indication that the base unit is busy at the mobile unit.
41 Citations
11 Claims
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1. A radio communication system comprising:
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a plurality of mobile units that are movable to any place, the mobile units having respective identification data; and a base unit fixedly installed at a predetermined installation place, having a predetermined radio communication service area in the vicinity of the installation place and being connectable to a public telephone network through at least one public telephone line, the base unit being connectable through a radio channel to any one of the plurality of mobile units, wherein the mobile units are connected via a radio channel to the base unit by issuing a calling request to the base unit within the radio communication service area of the base unit so as to communicate with the public telephone network through the public telephone line, wherein the base unit comprises; calling request receiving means for receiving a calling request when the calling request is issued from one of the mobile units within the radio communication service area of the base unit; and connection control means for receiving a calling request when the calling request is issued from one of the mobile units within the radio communication service area of the base unit, the connection control means including registering means for, when said at least one public telephone line is idle, connecting said one mobile unit, which issued the calling request, to the public telephone network through the idle public telephone line, and for, when said at least one public telephone line is busy, registering identification data of said one mobile unit, which issued the calling request, as a mobile unit in a calling request wait state in the registering means and for transmitting wait data indicative of the wait state of calling request by said one mobile unit, and wherein each of the mobile units comprises; calling request transmitting means for transmitting a calling request to the base unit using a calling operation; registration changing means for transmitting a registration confirming signal to mobile units registered in the registering means and, when a response signal to the registration confirming signal is not issued from one of the registered mobile units, erasing the registration of the one registered mobile unit which does not issue the response signal; means for transmitting a changed registration signal indicative of a new registration content as changed by the registration changing means; display means for displaying the wait state of calling requests upon receipt of the wait data from the base unit; and display control means for displaying the changed registration content on the display in response to the reception of the changed registration signal, wherein the connection control means responds to the registering means to establish a connection from a waiting mobile unit through the one public telephone line connected to the base unit, when the one public telephone line becomes idle upon disconnection of the one mobile unit through the base unit, and wherein the wait data comprises numerical data, and the registration changing means subtracts one from the numerical data when erasing the registration of the one registered mobile unit, the changed registration signal transmitting means transmits the numerical data subtracted by one. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification