EP0595786A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Colocated cellular radiotelephone systems
Assignee: Motorola Solutions Inc
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Filing: 1988-07-18
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Granted: —
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Expires: 2008-07-18
Abstract
Abstract An existing cellular system (X-system 102) is interconnected with another cellular system (M-system 101) via inter-office trunks (150) to add additional switching capacity for providing telephone coverage to mobiles located throughout their common coverage area. X-system (102) includes a control terminal (120) coupled by data and voice lines to base sites (121-124) and by out trunks to a telephone central office (110). M-system (101) includes a control terminal (420) coupled by data and voice lines to base sites (411-415) and by in trunks and out trunks to the telephone central office (110). M-system base sites (411-414) are colocated with corresponding existing X-system base sites (121-124). Paging/access channels are assigned to M-system base sites (411-414) for processing all incoming originations from mobiles and paging mobiles for all outgoing originations. Access-only channels are assigned to X-system base sites (121-124) for processing mobile originations transferred to X-system (102) by a directed retry message from M-system (101). M-system (101) shares the mobile origination traffic with X-system (102) by sending a directed retry message to a percentage of the originating mobiles.
Inventors
- 👤 Morton Stern
- 👤 James M. Williams
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:56
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/14; H04W16/02; H04W16/06; H04W28/00; H04W28/16; H04W64/00; H04W68/00; H04W72/00; H04W72/04; H04W74/00; H04W84/00; H04W84/02; H04W84/04; H04W84/042; H04W84/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
310 words
A method of processing radiotelephone calls in at least first and second radiotelephone systems and a central office for providing telephone service to radiotelephones located in a geographical area, said geographical area divided into a plurality of cells, each cell assigned a plurality of voice channels, a paging channel and/or at least an access channel utilizing radio channels which differ from those radio channels assigned to adjoining cells, said first radiotelephone system including a plurality of out trunks, a plurality of inter-office trunks and a plurality of fixed site radio apparatus each located in a different cell for communicating with said radiotelephones, and said second radiotelephone system including a plurality of in trunks, a plurality of out trunks, a plurality of inter-office trunks and a plurality of fixed site radio apparatus each located in a different cell for communicating with said radiotelephones, said method characterized by the steps of: coupling out trunks of said first radiotelephone system to the central office; coupling in trunks and out trunks of said second radiotelephone system to the central office; coupling inter-office trunks of said first radiotelephone system to inter-office trunks of said second radiotelephone system; locating each fixed site radio apparatus of said second radiotelephone system with the fixed site radio apparatus of said first radiotelephone system in the same cell; assigning for each cell at least one access channel and at least one of the plurality of voice channels for the cell to the fixed site radio apparatus of said first radiotelephone system located in the cell, and at least one paging channel and at least one of the plurality of voice channels for the cell to the fixed site radio apparatus of said second radiotelephone system located in the cell; and directing a predetermined percentage of telephone calls originated by radiotelephones from said second radiotelephone system to said first radiotelephone system.
Claim 2
Dependent Claim
42 words
The method according to claim 1, wherein new cells are added for expanding the geographical area, and characterized in that said locating step further includes the step of locating fixed site radio apparatus of said second radiotelephone system in each new cell.
Claim 3
Dependent Claim
77 words
The method according to claim 1, wherein each originating radiotelephone sends a dialed telephone number and characterized in that said directing step further includes, at said first radiotelephone system, the steps of: receiving a request for a voice channel from an originating radiotelephone; assigning a voice channel to said originating radiotelephone; and terminating said originating radiotelephone to an available one of the out trunks of said first radiotelephone system or inter-office trunks of said first radiotelephone system.
Claim 4
Dependent Claim
26 words
The method according to claim 1, characterized in that said directing step further includes the step of sending a directed retry message to said originating radiotelephone.
Claim 5
Dependent Claim
40 words
The method according to claim 1, further including the steps of: receiving a telephone number of a radiotelephone from one of said in trunks; and paging the radiotelephone having the received telephone number on the paging channels of each cell.
Claim 6
Dependent Claim
75 words
The method according to claim 1, wherein said radiotelephones transmit a page response message in response to receiving a paging message, and said paging step includes the step of sending a paging message to the radiotelephone having the received telephone number, said method further including the steps of: receiving a page response message from said paged radiotelephone; and sending a voice channel assignment message to said paged radiotelephone if a page response message is received.
Claim 7
Dependent Claim
252 words
A communications system coupled to a central office for processing radiotelephone calls, comprising, in combination: first and second radiotelephone systems for providing telephone service to radiotelephones located in geographical area, said geographical area divided into a plurality of cells, each cell assigned a plurality of voice channels, a paging channel and/or an access channel utilizing radio channels which differ from those radio channels assigned to adjoining cells; said first radiotelephone system including: a plurality of inter-office trunks; and a plurality of fixed site radio apparatus each located in a different cell for communicating with said radiotelephones, each fixed site radio apparatus of said first radiotelephone system being assigned at least one access channel and at least two of the plurality of voice channels for the cell in which it is located; CHARACTERIZED IN THAT said second radiotelephone system including; a plurality of in trunks and a plurality of out trunks coupled to the central office; a plurality of inter-office trunks coupled to inter-office trunks of said first radiotelephone system; and a plurality of fixed site radio apparatus each located in a different cell for communicating with said radiotelephones, each fixed site radio apparatus of said second radio telephone system being assigned at least one paging channel and at least two of the plurality of voice channels for the cell in which it is located, and each fixed site radio apparatus of said first radiotelephone system being located with the fixed site radio apparatus of said second radiotelephone system in the same cell.
References Cited (Backward Citations)
No citation records indexed.
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