EP0583137A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Architecture for a cellular wireless telecommunication system
Assignee: AT&T Inc
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Filing: 1993-08-05
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Granted: —
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Expires: 2013-08-05
Abstract
Abstract This invention relates to a method and apparatus for offering wireless telecommunication service. A switch such as an automatic Private Branch Exchange (PBX) (30), equipped to communicate with Integrated Services Digital Network (ISDN) station sends ISDN signaling messages to and receives ISDN signaling messages from a protocol converter (20). The protocol converter, which also communicates with a wireless cell site (10), converts messages between the ISDN protocol and a protocol for communicating with the wireless cell site. The cell site sets up wireless connections to a mobile station (1), essentially in its prior art mode, and the PBX (30) sets up connections to the cell site (10) essentially in its prior art ISDN station control mode. The system can also hand off calls from one cell site to another connected (via 47) to the same PBX, using the protocol converter to generate and distribute the locate request messages. The system can further process roamers by allowing them to register locally and by directly connecting intra-system traffic to such roamers.
Inventors
- 👤 James Joseph Fuentes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 17:42
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/02; H04W84/10; H04W84/16; H04M; H04M3/00; H04M3/42; H04M3/42229; H04M3/54; H04M2203/00; H04M2203/10; H04M2203/1091; H04M7/00; H04Q; H04Q2213/00; H04Q2213/13098; H04Q2213/13173; H04Q2213/13175; H04Q2213/13298; H04W88/00; H04W88/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
159 words
A wireless telecommunication system, comprising: a telecommunication switching system (switch); a wireless cell site; and protocol conversion means for converting between a cell site control protocol, said cell site control protocol for signaling to and receiving signals from a wireless cell site, and an out-of-band telephone station control (OTSC) protocol; said switch connected to said cell site by a plurality of communication links; said switch connected to said cell site by data link means via said protocol conversion means; wherein said switch sends OTSC protocol signaling messages to said protocol conversion means, and said protocol conversion means converts said OTSC protocol signaling messages to cell site control protocol messages for transmission to said cell site, for controlling said cell site; wherein said cell site sends cell site control protocol signaling messages to said protocol conversion means, and said protocol conversion means converts said cell site control protocol signaling messages to OTSC protocol signaling messages for transmission to said switch.
Claim 2
Dependent Claim
168 words
A wireless telecommunication system, comprising: an automated Private Branch Exchange (PBX); a wireless cell site; and protocol conversion means for converting between a cell site control protocol, said cell site control protocol for signaling to and receiving signals from a wireless cell site, and an Integrated Services Digital Network (ISDN) protocol for signaling to and receiving signals from ISDN stations; said PBX connected to said cell site by a plurality of communication links; said PBX connected to said cell site by data link means via said protocol conversion means; wherein said PBX sends and receives ISDN signaling messages to said protocol conversion means, and said protocol conversion means converts said ISDN signaling messages to cell site control messages for transmission to said cell site, for controlling said cell site; wherein said cell site sends cell site control protocol signaling messages to said protocol conversion means, and said protocol conversion means converts said cell site control protocol signaling messages to OTSC protocol signaling messages for transmission to said PBX.
Claim 3
Dependent Claim
39 words
The system of claim 2 wherein said plurality of communication links comprises B-channels of an ISDN Primary Rate Interface (PRI) and the data link means between said PBX and said protocol conversion means is a D-channel of said PRI.
Claim 4
Dependent Claim
25 words
The system of claim 2 further comprising: land based customer lines connected to said PBX for communicating with mobile stations served by said cell site.
Claim 5
Dependent Claim
22 words
The system of claim 2 wherein said PBX is connectable via a central office switching system to a public switched telephone network.
Claim 6
Dependent Claim
36 words
The system of claim 2 wherein said PBX is connectable to another PBX, said another PBX for serving another cell site, wherein subscribers connectable to said PBX are connectable to subscribers connectable to said other PBX.
Claim 7
Independent Claim
63 words
A method of paging a station served by a wireless cell site, comprising: receiving an incoming call at a telecommunication switch (switch); transmitting from said switch to a protocol converter an Integrated Services Digital Network (ISDN) set-up message; converting in said protocol converter said set-up message to a paging message; and transmitting said paging message from said protocol converter to said cell site.
Claim 8
Dependent Claim
15 words
The method of claim 7 wherein said switch is an automatic Private Branch Exchange (PBX).
Claim 9
Dependent Claim
20 words
The method of claim 7 wherein said ISDN message is sent over a D-channel of a Primary Rate Interface (PRI).
Claim 10
Independent Claim
89 words
A method of controlling wireless calls served by a telecommunications switching system and a cell site, said cell site and said telecommunications switching system communicating signaling information by exchanging signaling messages, comprising: sending first signaling messages from said cell site in a first protocol; sending second signaling messages from said telecommunications switching system in a second protocol; converting said first signaling messages to said second protocol for transmission to said telecommunications switching system; and converting said second signaling messages to said first protocol for transmission to said cell site.
Claim 11
Dependent Claim
17 words
The method of claim 10 wherein said telecommunications switching system is an automatic Private Branch Exchange (PBX).
Claim 12
Dependent Claim
249 words
A wireless telecommunications system for handing off calls from one to another of a plurality of cell sites, comprising: a telecommunications switching system (switch); a plurality of wireless cell sites; protocol conversion means for converting between a cell site control protocol, said cell site control protocol for signaling to and receiving signals from a wireless cell site in an out of band telephone station control (OTSC) protocol; said switch connected to each of said cell sites by a plurality of communication links, said switch connected to each of said cell sites by data link means via said protocol conversion means; wherein said switch sends OTSC protocol signaling messages to said protocol conversion means, and said protocol conversion means converts said OTSC protocol signaling messages to cell site control protocol messages for transmission to said cell site, for controlling said cell site; wherein said cell site sends cell site control protocol signaling messages to said protocol conversion means, and said protocol conversion means converts said cell site control protocol signaling messages to OTSC protocol signaling messages for transmission to said switch; wherein one of said wireless cell sites sends locate request messages to a plurality of said plurality of wireless cell sites via said protocol conversion means and wherein said protocol conversion means receives locate response messages from said plurality of said plurality of wireless cell sites for selection of a handoff cell site by either of said protocol conversion means or the cell site which transmitted the locate request.
Claim 13
Dependent Claim
25 words
The system of claim 12 wherein said protocol conversion means generates a plurality of locate request messages for querying said plurality of wireless cell sites.
Claim 14
Dependent Claim
220 words
A wireless telecommunication system, comprising: a telecommunication switching system (switch); a wireless cell site; and protocol conversion means for converting between a cell site control protocol, said cell site control protocol for signaling to and receiving signals from a wireless cell site, and an out-of-band telephone station control (OTSC) protocol; said switch connected to said cell site by a plurality of communication links; said switch connected to said cell site by data link means via said protocol conversion means; wherein said switch sends OTSC protocol signaling messages to said protocol conversion means, and said protocol conversion means converts said OTSC protocol signaling messages to cell site control protocol messages for transmission to said cell site, for controlling said cell site; wherein said cell site sends cell site control protocol signaling messages to said protocol conversion means, and said protocol conversion means converts said cell site control protocol signaling messages to OTSC protocol signaling messages for transmission to said switch. wherein said cell site sends a registration request to said protocol conversion means for initiating a process to determine whether said registration request represents a roamer; wherein, responsive to a determination that said registration request represents a roamer, said protocol conversation initiates a process for informing a roamer data base of a location of a station that transmitted said registration request.
Claim 15
Dependent Claim
18 words
The system of claim 14 wherein said protocol conversion means determines whether said registration request represents a roamer.
Claim 16
Dependent Claim
33 words
The system of claim 14 wherein a roamer is registered in said switch and wherein calls originating in said switch and terminating to said roamer are completed without querying said roamer data base.
Claim 17
Dependent Claim
214 words
A wireless telecommunications system for handing off calls from one to another of a plurality of cell sites, comprising: a telecommunications switching system (switch); a plurality of wireless cell sites; protocol conversion means for converting between a cell site control protocol, said cell site control protocol for signaling to and receiving signals from a wireless cell site in an out of band telephone station control (OTSC) protocol; said switch connected to each of said cell sites by a plurality of communication links, said switch connected to each of said cell sites by data link means via said protocol conversion means; wherein said switch sends OTSC protocol signaling messages to said protocol conversion means, and said protocol conversion means converts said OTSC protocol signaling messages to cell site control protocol messages for transmission to said cell site, for controlling said cell site; wherein said cell site sends cell site control protocol signaling messages to said protocol conversion means, and said protocol conversion means converts said cell site control protocol signaling messages to OTSC protocol signaling messages for transmission to said switch; wherein the combination of said cell sites and said protocol conversion means effect a handoff of a call between ones of said cell sites, using OTSC protocol signaling messages for signaling to said switch.
Claim 18
Dependent Claim
33 words
A method as claimed in claim 10 wherein said second protocol, or a system as claimed in claim 12 or 17 wherein said OTSC protocol, is an Integrated Services Digital Network (ISDN) protocol.
References Cited (Backward Citations)
No citation records indexed.
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