US 4,233,473 AGranted

Comprehensive automatic mobile radio telephone system

OwnerEdward G. Frostinventor

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Abstract

In a multi-channel mobile radio telephone system with multiple base stations covering different geographical areas, mobiles may move freely from area to area and automatically originate and receive calls to and from a landswitched telephone network by direct dialing to and from anywhere in the system by means of a Roving Mobile Call System (RMCS). Mobile subscribers operating out of range of their home base stations (where they are registered for billing purposes) may originate any class of call via any base station in the system and be billed by the home base station by means of intercommunicating base stations in a Roving Mobile Ticketing System (RMTS). Provision is made for tariff sharing as necessary by participating stations. All call signalling and central signalling is performed out-of-band. Call signalling from any base station to mobiles is common to all radio channels transmitted by that station. Mobiles may be in the standby condition on any radio channel regardless of whether it is in use for communications purposes or not. Mobiles are directed to various channels for communications by the terminal equipment.

Claims8

Dependent claims

In a communications system of the type wherein movable subscriber radio receiver stations are capable of receiving coded radio transmissions indicating that a particular subscriber station is being called, wherein each of plural geographically-spaced base stations has a different plurality of subscriber stations assigned thereto and is capable of receiving calls for its assigned subscriber stations from a public telephone system and transmitting said coded radio transmissions for the called subscriber station throughout a geographic area served by that base station, a method permitting subscriber stations to be called via said coded radio transmissions when roaming outside the geographic area served by the home base station to which said subscriber stations are assigned but with a geographic area served by another remote base station, said method comprising the steps of:

(a) upon a roaming subscriber station entering a geographic area served by a remote base station, sending a registration signal to said remote base station identifying the roaming subscriber station and its home base station;
(b) in response to receiving said registration signal at said remote base station, signalling the home base station of said roaming subscriber station that the roaming subscriber station is located in the geographic area served by said remote base station;
(c) storing at said home base station, in response to said signalling from said remote base station, location data indicating that said roaming subscriber station is located in said geographic area served by said remote base station;
(d) in response to receiving a call at said home base station for said roaming subscriber station, determining from said stored location data the geographic area in which said roaming subscriber station is located and transferring said call to said remote base station serving the determined geographic area;
and
(e) at said remote base station, in response to transfer of a call thereto for said roaming subscriber station, transmitting said coded radio transmissions for said roaming subscriber station throughout the geographic area served by said remote base station.

3 more elements

In a communications system of the type wherein movable subscriber radio receiver stations are capable of receiving coded radio transmissions indicating that a particular subscriber is being called, wherein each of plural geographically-spaced stations has a different plurality of subscriber stations assigned thereto and is capable of receiving calls for its assigned subscriber stations from a public telephone system and transmitting said coded radio transmissions for the called subscriber station throughout a geographic area served by that base station, a method permitting subscriber stations to be called via coded radio transmissions when the subscriber stations are roaming outside the geographic area served by the home base station to which the called subscriber station is assigned but in a geographic area served by a remote base station to which the called subscriber station is not assigned, said method comprising the steps of:

(a) Upon a roaming subscriber station entering a geographic area served by a remote base station, sending a registration signal to said remote base station identifying the roaming subscriber station and its home base station;
(b) in response to receiving said registration signal at said remote base station, signalling said system that the roaming subscriber station is located in the geographic area served by said remote base station;
and
(c) storing in said system, in response to said signalling from said remote base station, location data indicating that said roaming subscriber station is located in said geographic area served by said remote base station.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 05/938,397Filed 31 Aug 1978 · division
Priority: 24 Mar 1977
Granted: 11 Nov 1980
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04W 4/24
Services specially adapted for wireless communication networks; Facilities therefor: accounting or billing
H04M 15/8038
Rating or billing plans; Tariff determination aspects: roaming or handoff
H04M 2215/34
Metering arrangements; Time controlling arrangements; Time indicating arrangements: roaming
H04M 2215/7442
Rating aspects, e.g. rating parameters or tariff determination apects: roaming