MOBILE RADIOTELEPHONE COMMUNICATION SYSTEM

• US 3,581,013 A
• Filed: 12/19/1968
• Issued: 05/25/1971
• Est. Priority Date: 12/21/1967
• Status: Expired due to Term

• Current Assignee: Alcatel SA (Nokia Corporation)
• Original Assignee: Muller Jean Jacques
• Inventors: MULLER JEAN JACQUES
• Application Number:
  US04/785,105
• Time in Patent Office: 887 Days
• US Class Current: 455/426.1
• CPC Class Codes: H04W 36/00 Hand-off or reselection arrangements
• 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 72/563 of the wireless resources
• CPC Class Codes: H04W 84/027 providing paging services

Abstract

A mobile telephone system is provided with radio telephone and paging equipment which is serviced over a group of channels allotted to a fixed radio telephone station. The latter provides automatic communication between the customers of a public telephone ground network and mobile sets. A free channel is marked by a tone, to be taken in a telephone call. Paging call numbers directed to paging mobile sets are transmitted from the station if the required channel is free. If the channel is not free, these paging calls alternate with the radiotelephone communications. In order to more effectively use the equipment, the called paging numbers are stored and then transmitted in limited trains of numbers.

Claims

1. A mobile radiotelephone communication system enabling users of a public telephone network to communicate with users of two types of mobile units, namely, mobile radiotelephone units involving radiotelephone service and paging receiver units involving paging service, in which a telephone exchange is associated with a radiotelephone station operating over a plurality of channels and including an engagement device for these channels, the telephone exchange including registers for accepting terminating calls and recognizing those of the paging service, the system comprising:

a first channel assigned for use with paging service calls and usable for radio telephone service, a memory device for storing numbers requested by the paging service while waiting for the channel assigned to these numbers to become free;

means connecting the registers to this memory device in order to transfer to it the numbers requested by the paging service; and

means for controlling the state of availability of the channel including a priority alternating device such that after a radiotelephone service communication the channel is first offered to the paging service before being freed, and after paging service transmission, the channel is first offered to the radiotelephone service before being freed.

2. A system as claimed in claim 1, in which the register includes means for determining the kind of call and releasing terminating call connections as soon as they are recognized to be calling paging service numbers.

3. A system as claimed in claim 1, in which the paging service numbers stored in the memory device are transmitted in limited groups.

4. A system as claimed in claim 1, in which the length of radiotelephone service communications over a channel used by the paging service is limited.

5. A system as claimed in claim 1, in which, means are provided in the engagement device for the channels to cause a terminating radiotelepHone service call to wait (instead of refusing it) when there is no channel free for this service, and when a channel is busied in transmitting a limited group of paging service calls, to pass the waiting call after the limited group.

6. A system as claimed in claim 1, in which the paging service comprises several sections of paging receiver units, assigned respectively to several channels, and the memory device is provided with discriminating means for addressing the requested numbers to their assigned channels.

7. A system as claimed in claim 6, in which the memory device can deal with only one channel at a time, and the memory device includes a selection device which serves the channels one after the other.

8. A system as claimed in claim 1 for covering an extended area (or distance) by means of a plurality of differentiated stations operating on different groups of channels, in which the paging receiver units have built-in tuning to a given channel in any group;

or they are built tuned to these channels.

9. A system as claimed in claim 8, in which the paging receiver units are shared among several channels in each different group.

10. A system as claimed in claim 8, in which a service channel is used for terminating radiotelephone service calls in all of the different stations.