GB2254521A - Pstn/pcn switching arrangement - Google Patents

Pstn/pcn switching arrangement Download PDF

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Publication number
GB2254521A
GB2254521A GB9106982A GB9106982A GB2254521A GB 2254521 A GB2254521 A GB 2254521A GB 9106982 A GB9106982 A GB 9106982A GB 9106982 A GB9106982 A GB 9106982A GB 2254521 A GB2254521 A GB 2254521A
Authority
GB
United Kingdom
Prior art keywords
network
pcn
pstn
public
digital main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9106982A
Other versions
GB9106982D0 (en
Inventor
Geoffrey Andrew Tooke
Charles Richard Stubbs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telent Technologies Services Ltd
GPT Ltd
Original Assignee
Telent Technologies Services Ltd
GPT Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telent Technologies Services Ltd, GPT Ltd filed Critical Telent Technologies Services Ltd
Priority to GB9106982A priority Critical patent/GB2254521A/en
Publication of GB9106982D0 publication Critical patent/GB9106982D0/en
Priority to EP19920907403 priority patent/EP0532726A1/en
Priority to PCT/GB1992/000599 priority patent/WO1992017986A2/en
Priority to JP92507170A priority patent/JPH05507838A/en
Priority to AU14695/92A priority patent/AU1469592A/en
Publication of GB2254521A publication Critical patent/GB2254521A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0435—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A public switched telephone network comprises a plurality of digital main switching units each including a gateway mobile switching centre for a public communications network. Also, a digital main switching unit for a public switched telephone network includes a gateway mobile switching centre for a public communications network.

Description

PSTN/PCN SWITCHING ARRANGEMENT The present invention relates to Public Communications Networks (PCNs). These networks provide a mobile communications service to a user carrying a low-powerd handset called a Mobile Station (MS).
According to the present invention there is provided a public switched telephone network comprising a plurality of digital main switching units each including a gateway mobile switching centre for a public communications network.
Each digital main switching unit is connectable to at least one mobile switching centre of a public communications network.
According to the present invention there is further provided a digital main switching unit for a public switched telephone network including a gateway mobile switching centre for a public communications network.
The present invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 shows a typical Public Communications Network interfaced to a Public Switched Telephone Network (PSTN); Figure 2 shows a Public Communication Network interfaced to a Public Switched Telephone Network in accordance with the present invention.
Referring to Figure 1, which shows a known version of a PCN/PSTN system, the PCN comprises a number of Base Station Systems (BSSs) limited to Mobile Switching Centres (MSCs). Each MSC has an associated Visited Location Register (VLR). A VLR contains information about PCN registered users who have been identified as being within the geographical area served by one of the BSS connected to the associated MSC. It is necessary for the user's Mobile Station (MS) to be switched "on" for the identification to take place.
One or more MSC's in a PCN are interfaced to the PSTN via a Gateway Mobile Switching Centre connected to Digital Main Switching Unit (DMSU) otherwise known as a Trunk Exchange. The functionality and interfaces of the GMSC are defined by the European standards body Groupe Speciale Mobile (GSM).
Additionally, each PCN has a Home Location Register (HLR), which contains information about all registered users of the PCN, including their current location if known, obtained from the VLRs.
This location information will identify the MSC serving the user's current location.
A PSTN user making a telephone call to a PCN registered user will dial the Mobile Subscriber Integrated Services Digital Network (MSISDN) number of that user. The call is routed via a Local Exchange (LE) to the DMSU.
From routing tables located in the DMSU it can be determined that the call is destined for a registered user of the PCN. The DMSU interrogates the HLR with a Send Routing Information (SRI) request. The HLR responds with a current Roaming Number (RN) for the called user or an indication that there is no current location information for the user (i.e. the user is not within range of a BSS or that the MS is switched 'off').
The RN is used by the interrogating DMSU to determine which GMSC and MSC serve the called user's current location. The call is then routed through the PSTN trunk network to the DMSU and GMSC which serve the called user's MSC.
Consequently, the PSTN operator provides the trunk network for the PCN operator, who avoids the large capital investment to set up its own separate trunk network.
Referring now to Figure 2, according to the present invention, there is shown an arrangement where the functionality of the PSTN DMSU and the PCN GMSC are combined in one physical unit, DMSU/GMSC, within the PSTN network. As a result the two logically separate networks share the same physical infrastructure. The PCN operator does not need to install its own GMSCs, and the functionality is provided by the PSTN operator on selected DMSUs.
While the invention has been described with particular reference to certain embodiments, neither the illustrated embodiment nor the terminology employed in describing them is intended to define the invention, which is intended to be limited only by the scope of the appended claims.

Claims (6)

1. A public switched telephone network comprising a plurality of digital main switching units each including a gateway mobile switching centre for a public communications network.
2. A network, as claimed in Claim 1, wherein at least one of the digital main switching units includes a node connected to a home location register for interrogation thereof.
3. A network as claimed in Claim 1 or 2, wherein each digital main switching unit is connectable to at least one mobile switching centre of a public communications network.
4. A public switched telephone network, substantially as hereinbefore described, with reference to and as illustrated in, Figure 2 of the accompanying drawings.
5. A digital main switching unit for a public switched telephone network including a gateway mobile switching centre for a public communications network.
6. A digital main switching unit as claimed in Claim 5 and sutstantially as hereinbefore described, with reference to and as illustrated in Figure 2 of the accompanying drawings.
GB9106982A 1991-04-03 1991-04-03 Pstn/pcn switching arrangement Withdrawn GB2254521A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB9106982A GB2254521A (en) 1991-04-03 1991-04-03 Pstn/pcn switching arrangement
EP19920907403 EP0532726A1 (en) 1991-04-03 1992-04-03 Switching arrangement for public switched telephone and public radio mobile networks
PCT/GB1992/000599 WO1992017986A2 (en) 1991-04-03 1992-04-03 Switching arrangement for public switched telephone and public radio mobile networks
JP92507170A JPH05507838A (en) 1991-04-03 1992-04-03 PSTN/PCN switching equipment
AU14695/92A AU1469592A (en) 1991-04-03 1992-04-03 Pstn/pcn switching arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9106982A GB2254521A (en) 1991-04-03 1991-04-03 Pstn/pcn switching arrangement

Publications (2)

Publication Number Publication Date
GB9106982D0 GB9106982D0 (en) 1991-05-22
GB2254521A true GB2254521A (en) 1992-10-07

Family

ID=10692586

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9106982A Withdrawn GB2254521A (en) 1991-04-03 1991-04-03 Pstn/pcn switching arrangement

Country Status (5)

Country Link
EP (1) EP0532726A1 (en)
JP (1) JPH05507838A (en)
AU (1) AU1469592A (en)
GB (1) GB2254521A (en)
WO (1) WO1992017986A2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262203A (en) * 1991-11-25 1993-06-09 Ericsson Telefon Ab L M Call routing in mobile telephone systems
WO1994005129A1 (en) * 1992-08-18 1994-03-03 Telefonaktiebolaget Lm Ericsson A communication network, method of establishing a connection, and apparatus and registration procedure in such a network
EP0649266A2 (en) * 1993-10-14 1995-04-19 Alcatel SEL Aktiengesellschaft Mobile radio network and conference arrangement therefor
DE4427072C1 (en) * 1994-08-01 1996-02-22 Deutsche Telekom Mobil Call forwarding appts. for relaying call from first communication network to second remote group telephone system (GSM)
GB2308790A (en) * 1995-12-21 1997-07-02 Daewoo Telecom Ltd Generating routing information in a mobile communication system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5901359A (en) * 1997-01-03 1999-05-04 U S West, Inc. System and method for a wireline-wireless network interface

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2638307B1 (en) * 1988-10-21 1994-06-10 Cit Alcatel SWITCHING CENTER FOR RADIOMOBILE APPLICATION

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262203A (en) * 1991-11-25 1993-06-09 Ericsson Telefon Ab L M Call routing in mobile telephone systems
US5307400A (en) * 1991-11-25 1994-04-26 Telefonaktiebolaget L M. Ericsson Call routing in mobile telephone systems
GB2262203B (en) * 1991-11-25 1995-08-09 Ericsson Telefon Ab L M Call routing in mobile telephone systems
WO1994005129A1 (en) * 1992-08-18 1994-03-03 Telefonaktiebolaget Lm Ericsson A communication network, method of establishing a connection, and apparatus and registration procedure in such a network
EP0649266A2 (en) * 1993-10-14 1995-04-19 Alcatel SEL Aktiengesellschaft Mobile radio network and conference arrangement therefor
EP0649266A3 (en) * 1993-10-14 1999-03-24 Alcatel SEL Aktiengesellschaft Mobile radio network and conference arrangement therefor
DE4427072C1 (en) * 1994-08-01 1996-02-22 Deutsche Telekom Mobil Call forwarding appts. for relaying call from first communication network to second remote group telephone system (GSM)
GB2308790A (en) * 1995-12-21 1997-07-02 Daewoo Telecom Ltd Generating routing information in a mobile communication system
US5890065A (en) * 1995-12-21 1999-03-30 Daewoo Telecom, Ltd. Routing information generation method for use in a mobile communications system
GB2308790B (en) * 1995-12-21 2001-09-05 Daewoo Telecom Ltd Routing information generation method for use in a mobile communications system

Also Published As

Publication number Publication date
AU1469592A (en) 1992-11-02
JPH05507838A (en) 1993-11-04
WO1992017986A2 (en) 1992-10-15
GB9106982D0 (en) 1991-05-22
WO1992017986A3 (en) 1992-11-26
EP0532726A1 (en) 1993-03-24

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)