MOBILE RADIO TELEPHONE AND PAGING SYSTEM

• US 3,564,150 A
• Filed: 06/18/1968
• Issued: 02/16/1971
• Est. Priority Date: 06/18/1968
• Status: Expired due to Term

• Current Assignee: Alcatel SA (Nokia Corporation)
• Original Assignee: Muller Jean Jacques
• Inventors: MULLER JEAN JACQUES
• Application Number:
  US04/737,963
• Time in Patent Office: 973 Days
• US Class Current: 455/450
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A public mobile radio communication system is provided for a plurality of mobile radio stations in which each mobile station includes either paging devices, or a telephone, or both. The system employs a service radio channel for sending selective calls from a fixed station to terminate at all the mobile stations. A second radio channel is marked by the fixed station for signaling from the mobile stations having telephones and the capacity to originate calls. Communication between the fixed station and a mobile telephone will employ either the second marked channel or another differently marked free channel.

Claims

1. A system for providing a radio link between a fixed radio station associated with a telephone exchange and a plurality of mobile radio stations, wherein the improvement comprises:

a fixed radio station capable of transmitting on a plurality of radio channels, a telephone receiver at each of a first group of selected mobile radio stations, a paging system at each of a second group of selected mobile radio stations, each mobile radio station being tuned to receive terminating calls over a fixed service radio channel, said fixed station providing a distinctive marking to one of said plurality of radio channels to designate an available free channel, said free channel serving as the signalling channel for the telephone equipped mobile radio stations when an originating call is made from one of them, and said free channel serving for the continuation of signalling and conversation in both originating and terminating calls to telephone equipped mobile radio stations.

2. A system according to claim l, in which:

an '"'"''"'"''"'"''"'"'originating'"'"''"'"''"'"''"'"' marking is constantly applied to mark the free channel as available for seizure by an originating call placed from a mobile station, and a '"'"''"'"''"'"''"'"'terminating'"'"''"'"''"'"''"'"' marking is applied to another free channel for the seizure of this channel by a mobile set in response to an incoming call.

3. A system according to claim 1, in which another free channel is selected, busied and marked '"'"''"'"''"'"''"'"'terminating'"'"''"'"''"'"''"'"' by the fixed station only upon the sending of a selective call directed to a mobile set.

4. A system according to claim 1, in which said markIng signal is constantly applied to the free channel to indicate the availability of the channel for seizure by the mobile unit.

5. A system according to claim 1, in which the fixed service channel is kept free of a marking signal.

6. A radiotelephone exchange as claimed in claim 1, including registers to analyze wanted numbers in terminating calls, and to control the sending of selective calls towards mobile apparatus, radiotelephone sets and warners, on a fixed service channel.

7. An exchange, according to claim 6, including means which allow the registers, which are located in the telephone exchange, to control the sending of selective calls towards warners without controlling switching in the associated fixed radio station which is coupled to said telephone exchange and to release the calling connection immediately after this sending.

8. An exchange according to claim 6, including turning priority means for selecting the channels to be marked.

9. A mobile radiotelephone station according to claim 1, comprising means to return to a condition of readiness on a fixed service channel after a communication, and means for searching for a marked channel.

10. A mobile set according to claim 9, including a signaller allowing exchanges of signals and programmed operations.