GB2268359A - Mobile radio systems. - Google Patents

Mobile radio systems. Download PDF

Info

Publication number
GB2268359A
GB2268359A GB9213373A GB9213373A GB2268359A GB 2268359 A GB2268359 A GB 2268359A GB 9213373 A GB9213373 A GB 9213373A GB 9213373 A GB9213373 A GB 9213373A GB 2268359 A GB2268359 A GB 2268359A
Authority
GB
United Kingdom
Prior art keywords
interface unit
network interface
mobile
call
network
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.)
Granted
Application number
GB9213373A
Other versions
GB2268359B (en
GB9213373D0 (en
Inventor
Michael John Mctiffin
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.)
Roke Manor Research Ltd
Original Assignee
Roke Manor Research 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 Roke Manor Research Ltd filed Critical Roke Manor Research Ltd
Priority to GB9213373A priority Critical patent/GB2268359B/en
Priority to GB9214572A priority patent/GB2268360B/en
Publication of GB9213373D0 publication Critical patent/GB9213373D0/en
Priority to DE69324409T priority patent/DE69324409T2/en
Priority to EP93108303A priority patent/EP0577959B1/en
Priority to DE69333494T priority patent/DE69333494T2/en
Priority to EP93108309A priority patent/EP0577960B1/en
Priority to US08/077,434 priority patent/US5359603A/en
Priority to FI932899A priority patent/FI932899A/en
Priority to FI932900A priority patent/FI932900A/en
Priority to NO932303A priority patent/NO932303L/en
Priority to NO932304A priority patent/NO932304L/en
Priority to JP15341993A priority patent/JPH0698370A/en
Priority to JP15341793A priority patent/JPH0677989A/en
Publication of GB2268359A publication Critical patent/GB2268359A/en
Application granted granted Critical
Publication of GB2268359B publication Critical patent/GB2268359B/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • 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
    • H04Q11/0478—Provisions for broadband connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5603—Access techniques
    • H04L2012/5604—Medium of transmission, e.g. fibre, cable, radio
    • H04L2012/5607—Radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5614—User Network Interface
    • H04L2012/5615—Network termination, e.g. NT1, NT2, PBX
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5614—User Network Interface
    • H04L2012/5616—Terminal equipment, e.g. codecs, synch.

Description

2268359 MOBILE RADIO SYSTEMS The present invention relates to mobile radio
asynchronous -.transmission mode (ATM) systems.
In mobile systems it is important that the radio spectrum is used efficiently. Known techniques by which this efficiency can be improved require the mobile terminals to frequently change the base station or base stations to which they are affiliated (ie through which they communicate). This -can impose stringent requirements on switching times in the fixed network infrastructure if breaks in communication due to reaffiliation are to be kept short.
Typically, the network part of a mobile system consists of base stations connected to a mobile network interface unit (A4NW). The AINX is the point of interconnection between the mobile network and the fixed network for as long as a call is being handled by one of the base stations in its area of responsibility.
In networks which use or handle ATM data, the data transmitted in such networks is sub-divided into small packets of data, known as cells. The cells consist of 48 octets of user data and 5 octets of header information.
An aim of the present invention is to provide an asynchronous transmission mode ATM system in which the network within such a system is not required to take any action to support mobility of a mobile terminal within the area controlled by a mobile network interface unit.
According to the present invention there is provided an asynchronous transmission mode (ATM) system adapted for use with mobile terminals, the system comprising a mobile network interface unit connected to a network, a plurality of base stations connected to the network, and at least one mobile terminal arranged to -communicate with the base stations over a radio link, the network being arranged to connect the mobile network interface unit and the base stations, said connections being defined by a virtual path identifier, characterised in that a unique virtual channel identifier is allocated at call set up, by the mobile network interface unit, for identifying a call associated with a mobile terminal which is being handled within an area controlled by the mobile network interface unit, the virtual channel identifier being placed in a virtual channel identifier field of ATM cells carrying user data associated with the call.
An embodiment of the present invention will now be described with reference to the accompanying drawings, in which:
FIGURE 1 shows a virtual path across an ATM network and the virtual channels within the virtual path; and, FIGURE 2 shows an ATM system and the transmission paths between a mobile terminal and a mobile network interface unit.
Referring to Figure 1, an AIM network 2 is shown having a virtual path 4 across the network. The virtual path comprises a number of virtual channels 6. The user data from individual transmission logical bursts is transported over the ATM network in one or more ATM cells. The data transported includes all types of information passing between the user and the network, including speech data. Each ATM cell includes a header which contains control information including the virtual path identifier (VPI) and the virtual -g- channel identifier (VCI). The virtual path identifier and the virtual channel identifier are held within fields. The two fields are used to route the cells across the ATM network. The VPI is used to define a logical virtual path between two points in the network and in general there will be no direct physical connection between these two points. A virtual path will contain logical channels and the VG value defines individual logic channels within the virtual path. The WI only has significance within the virtual path and the same WI value may be re-used on other virtual paths. The switching node that routes on the basis of the VPI will never need to examine the WI field. The foregoing description represents the standard operation of an ATM network in accordance with CCITT Recommendations, eg,
1. 121 Broadband Aspects of ISDN; 1. 150 Broadband ATM Functional Characteristics CCITT Blue Book; 1. 211 Overall Network Aspects and Functions, ISDN User Network Interfaces; 1. 321 B-ISDN Protocol Reference Model and its Applications; 1. 361 B-ISDN ATM Layer Specification.
An explanation of the basic principles of ATM switching is given in a book entitled "Asynchronous Transfer Mode Solution for Broadband ISDN" by Martin de Prycker, published by Enis Horwood 1991. ISBN 0-13-053513.3.
The present invention as defined with reference to Figure 2, redefines the VC1 so that it identifies the call and gives that call global significance within the area of a particular mobile network interface unit As already stated, switching nodes which route on the basis of the VPI field do not examine the VC field, and therefore this use of the VC field does not conflict with normal ATM network operation.
The connections between the mobile network interface unit 8 and the base stations 10a and 10b are re-defined by the VPI. The call within the whole mobile network interface unit area is represented by the VC which has global significance across all such M's. Each call in progress has a unique VC allocated by the mobile network interface unit 8 at the time the call is set up. The mobile network interface unit 8 can then identify the cell relating to a particular call by reference to the VC alone.
The network is configured so that the mobile network interface unit 8 has a virtual path to each of the base stations 10a and 10b. In Figure 2, a virtual path designated VPIA is shown connected to base station 10a, and a virtual path designated VPIB is shown connecting to base station 10b. These designations apply at the mobile network interface unit 8. Within the ATM network 2 the VPI may be translated resulting in different values being used at the base stations. Regardless of the values which are used they relate to the same virtual path.
At the time the call to or from a mobile terminal 12 is set up, the call is allocated an unique VC which is placed in the VC field of all ATM cells carrying user data associated with that call from the particular base station 10a or 10b to the mobile network interface unit 8, and from the mobile interface network unit 8 to the particular base station 10i or 10b. ' lle same VC will generally be used in both directions of transmission, but this is not essential. In Figure 2, call X is allocated channel identifier WIX.
When the mobile terminal 12 is affiliated to a particular base station 10a or 10b the user data is transmitted across the network using the VPI associated with the connection from that base station to the mobile network interface unit, and the M allocated at the time of call set up. When the mobile terminal 12 is affiliated to base station 10a, the path identifier VPIA and channel identifier MX are used, and when the mobile terminal 12 is affiliated to base station 10b, the path identifier VPIB and the channel identifier. YCIX are used.
It will be seen from the above that no action is required by the ATM network to support mobility of the mobile terminal 12 within the area of the mobile network interface unit 8. Frequent and rapid reaffiliation of the mobile terminal is therefore possible, enabling a macrodiversity to be readily supported.
It will readily be appreciated by those skilled in the art, that while the above embodiment is described with reference to an ATM network, the invention is not limited thereto, the network could comprise dedicated lines by way of which ATM type data is transmitted.

Claims (3)

CLAIMS:
1. An asynchronous transmission mode (ATM) system adapted for use with mobile terminals, the system comprising a mobile network interface unit connected to an network, a plurality of base stations connected to the network, an d at least one mobile terminal arranged to communicate with the base stations over a radio link, the network being arranged to connect the mobile network interface unit and the base stations, said connections being defined by a virtual path identifier, characterised in that a unique virtual channel identifier is allocated at call set up, by the mobile network interface unit, for identifying a call associated with a mobile terminal which is being handled within an area controlled by the mobile network interface unit, the virtual channel identifier being placed in a virtual channel identifier field of ATM cells carrying user data associated with the call.
2. An asynchronous transmission mode system as claimed in claim 1, wherein the mobile network interface unit, by reference to a virtual channel identifier, identifies the cells relating to a particular call.
3. An asynchronous transmission mode system as claimed in claim 1 or claim 2, wherein the network is an ATIA networiz.
3. An asynchronous transmission mode system as claimed in claim 1 or claim 2, wherein the network is an ATM network.
4. An asynchronous transmission mode system as claimed in claim 1 or claim 2, wherein the network comprises a plurality of dedicated lines.
5. An asynchronous transmission mode system substantially as hereinbefore described with reference to Figure 2 of the accompanying drawings.
- <:E - Amendments to the claims have been filed as follows 1. An asynchronous transmission mode (ATM) system adapted for use with mobile terminals, the system comprising a mobile network interface unit connected to aynetwork, a plurality of base stations connected to the network, and at least one mobile terminal arranged to communicate with the base stations over a radio link, the network being arranged to connect the mobile network interface unit and the base stations, said connections being defined by a virtual path identifier, characterised in that a unique virtual channel identifier is allocated at set up of a call or connection, by the mobile network interface unit, for identifying a call or connection associated with a mobile terminal which is being handled within an area controlled by the mobile network interface unit, the virtual channel identifier being placed in a virtual channel identifier field of ATIA cells carrying user data associated with the call or connection.
2. An asynchronous transmission mode system as claimed in claim 1, wherein the mobile network interface unit, by reference to a virtual channel identifier, identifies the cells relating to a particular call or connection.
GB9213373A 1992-06-24 1992-06-24 Mobile radio systems Revoked GB2268359B (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
GB9213373A GB2268359B (en) 1992-06-24 1992-06-24 Mobile radio systems
GB9214572A GB2268360B (en) 1992-06-24 1992-07-09 Improvements relating to mobile radio networks
EP93108303A EP0577959B1 (en) 1992-06-24 1993-05-21 Mobile radio systems
DE69324409T DE69324409T2 (en) 1992-06-24 1993-05-21 Mobile radio systems
DE69333494T DE69333494T2 (en) 1992-06-24 1993-05-22 Improvements in relation to mobile networks
EP93108309A EP0577960B1 (en) 1992-06-24 1993-05-22 Improvements relating to mobile radio networks
US08/077,434 US5359603A (en) 1992-06-24 1993-06-17 Mobile radio systems
NO932303A NO932303L (en) 1992-06-24 1993-06-23 Improvements to mobile radio networks
FI932900A FI932900A (en) 1992-06-24 1993-06-23 MOBILE COMMUNICATIONSSYSTEM
FI932899A FI932899A (en) 1992-06-24 1993-06-23 MOBILTERMINALNAET
NO932304A NO932304L (en) 1992-06-24 1993-06-23 Mobile Radio Systems
JP15341993A JPH0698370A (en) 1992-06-24 1993-06-24 Mobile radiocommunication network
JP15341793A JPH0677989A (en) 1992-06-24 1993-06-24 Mobile radio apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9213373A GB2268359B (en) 1992-06-24 1992-06-24 Mobile radio systems

Publications (3)

Publication Number Publication Date
GB9213373D0 GB9213373D0 (en) 1992-08-05
GB2268359A true GB2268359A (en) 1994-01-05
GB2268359B GB2268359B (en) 1996-04-10

Family

ID=10717633

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9213373A Revoked GB2268359B (en) 1992-06-24 1992-06-24 Mobile radio systems
GB9214572A Expired - Fee Related GB2268360B (en) 1992-06-24 1992-07-09 Improvements relating to mobile radio networks

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB9214572A Expired - Fee Related GB2268360B (en) 1992-06-24 1992-07-09 Improvements relating to mobile radio networks

Country Status (7)

Country Link
US (1) US5359603A (en)
EP (1) EP0577959B1 (en)
JP (1) JPH0677989A (en)
DE (1) DE69324409T2 (en)
FI (1) FI932900A (en)
GB (2) GB2268359B (en)
NO (1) NO932304L (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998036612A2 (en) * 1997-02-12 1998-08-20 Nokia Telecommunications Oy Mobility and call control in an atm environment
US5905728A (en) * 1996-06-19 1999-05-18 Electronics And Telecommunications Research Institute Method of assigning connection identifier in asynchronous transfer mode switching system
US6349099B1 (en) 1997-06-13 2002-02-19 Nokia Networks Oy Connection identification in transmission system of wireless telecommunication network over ATM protocol stack
US6542501B1 (en) 1996-01-29 2003-04-01 Nokia Telecommunications Oy Speech transmission in a mobile communication network

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05219124A (en) * 1991-09-10 1993-08-27 Philips Gloeilampenfab:Nv Mobile radio set
JPH09504659A (en) * 1993-06-16 1997-05-06 コム ２１， インコーポレイテッド． Multi-protocol personal communication system
JPH0746248A (en) * 1993-07-30 1995-02-14 Toshiba Corp Radio communication system
FI97517C (en) * 1993-09-06 1996-12-27 Nokia Mobile Phones Ltd Packet data transmission in a digital cellular network
US5473602A (en) * 1994-03-04 1995-12-05 Nova-Net Communications, Inc. Wireless radio packet switching network
GB2288950B (en) * 1994-04-23 1998-03-04 Roke Manor Research Improvements in or relating to mobile communication ATM networks
US5694546A (en) 1994-05-31 1997-12-02 Reisman; Richard R. System for automatic unattended electronic information transport between a server and a client by a vendor provided transport software with a manifest list
US5633868A (en) * 1994-10-17 1997-05-27 Lucent Technologies Inc. Virtual circuit management in cellular telecommunications
FI945223A (en) 1994-11-07 1996-05-08 Nokia Telecommunications Oy Cellular radio system and base station
US6006069A (en) * 1994-11-28 1999-12-21 Bosch Telecom Gmbh Point-to-multipoint communications system
ES2244959T3 (en) * 1995-02-06 2005-12-16 Alcatel CELL SWITCHING NETWORK.
CN1085473C (en) * 1995-03-01 2002-05-22 诺基亚流动电话有限公司 Data transmission in radio telephone net work
US5533026A (en) * 1995-03-06 1996-07-02 International Business Machines Corporation Communication system including method and apparatus for maintaining communications with a mobile terminal
GB2298765B (en) * 1995-03-07 1999-03-24 Roke Manor Research Improvements in or relating to mobile telecommunications networks
JP3612105B2 (en) 1995-03-13 2005-01-19 株式会社東芝 ATM communication system and process migration method in ATM communication system
US5784362A (en) * 1995-04-17 1998-07-21 Telefonaktiebolaget Lm Ericsson Temporary frame identification for ARQ in a reservation-slotted-ALOHA type of protocol
US6112056A (en) 1995-06-07 2000-08-29 Cisco Systems, Inc. Low power, short range point-to-multipoint communications system
US5623495A (en) * 1995-06-15 1997-04-22 Lucent Technologies Inc. Portable base station architecture for an AD-HOC ATM lan
US5757783A (en) * 1995-06-15 1998-05-26 Lucent Technologies Inc. Method and apparatus for routing ATM cells in an AD-ATM LAN
FI101763B1 (en) * 1995-12-01 1998-08-14 Nokia Mobile Phones Ltd The retention of the transported information composition between base station switches
FI102132B1 (en) 1995-12-01 1998-10-15 Nokia Mobile Phones Ltd Use of the ATM cell's title field in radio-mediated ATM communication
US5691981A (en) * 1996-01-11 1997-11-25 Motorola, Inc. Method and apparatus for providing roaming instructions to data communication receivers
FI102654B (en) * 1996-02-22 1999-01-15 Nokia Mobile Phones Ltd Method of replacing base station in a radio extension of the ATM network
US5907542A (en) * 1996-04-15 1999-05-25 Ascom Tech Ag Dynamic assignment of signalling virtual channels for wireless ATM systems
US5787077A (en) * 1996-06-04 1998-07-28 Ascom Tech Ag Dynamic connection mapping in wireless ATM systems
FR2750283B1 (en) * 1996-06-20 1998-07-31 Quinquis Jean Paul LOCAL MOBILE ACCESS NETWORK PROVIDED WITH MEANS FOR MANAGING RESOURCES IN SUCH A NETWORK
US5884064A (en) * 1996-09-04 1999-03-16 Lucent Technologies Inc. System for emulating a virtual path in an ATM network
US6064649A (en) * 1997-01-31 2000-05-16 Nec Usa, Inc. Network interface card for wireless asynchronous transfer mode networks
JP3575225B2 (en) * 1997-05-19 2004-10-13 株式会社日立製作所 Packet switch, packet switching network, and packet switching method
FI105436B (en) * 1998-02-11 2000-08-15 Nokia Networks Oy Method of switching data communication channel in a mobile communication system
AU6497698A (en) 1998-02-16 1999-08-30 Nokia Telecommunications Oy Method and system for performing handover in a mobile communication system
FI110987B (en) 1998-03-31 2003-04-30 Nokia Corp Method of connecting data transfer streams
JP3092600B2 (en) * 1998-09-11 2000-09-25 日本電気株式会社 Mobile communication method and mobile communication system
KR20030069671A (en) * 2002-02-22 2003-08-27 삼성전자주식회사 Apparatus and method for transmitting cell in a telecommunication system
US8611919B2 (en) 2002-05-23 2013-12-17 Wounder Gmbh., Llc System, method, and computer program product for providing location based services and mobile e-commerce
US10489449B2 (en) 2002-05-23 2019-11-26 Gula Consulting Limited Liability Company Computer accepting voice input and/or generating audible output

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8910085D0 (en) * 1989-05-03 1989-06-21 British Telecomm Mobile communications system
US5195090A (en) * 1991-07-09 1993-03-16 At&T Bell Laboratories Wireless access telephone-to-telephone network interface architecture

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6542501B1 (en) 1996-01-29 2003-04-01 Nokia Telecommunications Oy Speech transmission in a mobile communication network
US5905728A (en) * 1996-06-19 1999-05-18 Electronics And Telecommunications Research Institute Method of assigning connection identifier in asynchronous transfer mode switching system
WO1998036612A2 (en) * 1997-02-12 1998-08-20 Nokia Telecommunications Oy Mobility and call control in an atm environment
WO1998036612A3 (en) * 1997-02-12 1998-10-15 Nokia Telecommunications Oy Mobility and call control in an atm environment
US6606310B1 (en) 1997-02-12 2003-08-12 Nokia Corporation Mobility and call control in an ATM environment
US6349099B1 (en) 1997-06-13 2002-02-19 Nokia Networks Oy Connection identification in transmission system of wireless telecommunication network over ATM protocol stack

Also Published As

Publication number Publication date
JPH0677989A (en) 1994-03-18
EP0577959B1 (en) 1999-04-14
FI932900A0 (en) 1993-06-23
EP0577959A1 (en) 1994-01-12
US5359603A (en) 1994-10-25
FI932900A (en) 1993-12-25
GB2268359B (en) 1996-04-10
DE69324409T2 (en) 1999-08-05
DE69324409D1 (en) 1999-05-20
GB2268360A (en) 1994-01-05
GB9213373D0 (en) 1992-08-05
NO932304D0 (en) 1993-06-23
NO932304L (en) 1993-12-27
GB2268360B (en) 1996-04-10
GB9214572D0 (en) 1992-08-19

Similar Documents

Publication Publication Date Title
US5359603A (en) Mobile radio systems
US5168498A (en) Mobile communications system
US6738381B1 (en) ATM time stamped queuing
US5777994A (en) ATM switch and intermediate system
US6504845B1 (en) Centralized queuing for ATM node
US6483838B1 (en) Combined header parameter table for ATM node
US6804246B1 (en) Asynchronous transfer mode system handling differing AAL protocols
JPH04229747A (en) Packet exchange system and packet exchange
US5914937A (en) B-ISDN access
EP1098479B1 (en) Packet switching system having self-routing switches
EP1415500B1 (en) Bandwidth efficient quality of service separation of aal2 traffic
GB2254529A (en) Connectionless switching for an atm or dqdb switch
US6597698B1 (en) Coordinated cell discharge from ATM queue
EP0995290B1 (en) Vc merging for atm switch
US6005867A (en) Time-division channel arrangement
EP0991293B1 (en) Method and system to transport narrowband calls across an ATM network
US6289019B1 (en) Device and method for switching ATM cells to groups of connections and corresponding input and output terminal functions
US5987007A (en) Manipulation of header field in ATM cell
US6859457B1 (en) Substitution call control system in ATM communication network
Cisco ATM Technology
Cisco ATM Technology
Cisco ATM Technology
CA2130865A1 (en) Switching system
US7058062B2 (en) Packet switching system having self-routing switches
Huang et al. Wireless LAN emulation over ATM networks

Legal Events

Date Code Title Description
773K Patent revoked under sect. 73(2)/1977