GB2307827A - Providing Packet Data to a Mobile Communications System - Google Patents

Providing Packet Data to a Mobile Communications System Download PDF

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Publication number
GB2307827A
GB2307827A GB9524585A GB9524585A GB2307827A GB 2307827 A GB2307827 A GB 2307827A GB 9524585 A GB9524585 A GB 9524585A GB 9524585 A GB9524585 A GB 9524585A GB 2307827 A GB2307827 A GB 2307827A
Authority
GB
United Kingdom
Prior art keywords
mobile
packet
packet data
network
switching centre
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Withdrawn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
GB9524585A
Other versions
GB9524585D0 (en
Inventor
Kenneth Richardson
Ian Sayers
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to GB9524585A priority Critical patent/GB2307827A/en
Publication of GB9524585D0 publication Critical patent/GB9524585D0/en
Priority to PCT/GB1996/002962 priority patent/WO1997021313A1/en
Publication of GB2307827A publication Critical patent/GB2307827A/en
Withdrawn legal-status Critical Current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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/30—Peripheral units, e.g. input or output ports
    • H04L49/3081—ATM peripheral units, e.g. policing, insertion or extraction
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Landscapes

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

Abstract

Packet data is routed from a packet data network to a mobile suscriber served by a mobile switching centre 14 by providing the packet with a temporary address whereby the packet is forwarded to the mobile switching centre and providing the packet on arrival at the mobile switching centre with the address of the mobile terminal 10.

Description

MOBILE COMMUNICATIONS SYSTEM This invention relates to mobile communications systems and in particular to the provision of packet data services in a mobile system.
Mobile telephone networks were originally developed to provide voice services to customers. However, customers are now demanding access to many of the services, including packet data services, that are provided on the conventional wired network. It is of course difficult to determine the precise location of a mobile user who is free to roam throughout the mobile service area. There is thus a problem of routing traffic from the conventional fixed networks to the mobile subscriber. In the normal circuit switched network this problem is addressed by using the call forward facility to direct a mobile terminated call to the mobile switching centre (MSC) serving the subscriber. In a fixed packet data network however, this call forwarding facility is not provided and thus the support of dynamic routing to mobile customers can be difficult and costly.
The object of the invention is to minimise or to overcome this disadvantage.
According to the invention there is provided a method of routing packet data from a packet data network to a mobile network subscriber served by a mobile switching centre, the method including providing the packet with a temporary address whereby the packet is routed via the mobile network to the mobile switching centre, and providing the packet on arrival at the mobile switching centre with the address of the mobile terminal whereby the packet is routed from the mobile switching centre to the terminal.
The mobile terminal address may be a data network number or a roaming data number.
Embodiments of the invention will now be described with reference to the accompanying drawings in which the single figure is a schematic design of a mobile telecommunications network supporting both voice and packet data services.
Referring to the drawing, the mobile system include an array of cells 11 each served by a respective base station 12 providing communication with subscriber terminals 10 currently located in that cell. A number of base stations are controlled by a base station controller 13 which in turn is coupled to a mobile switching centre (MSC) 14. The MSC incorporates a database or visitors location register (VLR) 15 containing information on the cellular location of mobile terminals 10 currently in the service area of that MSC.
Information on all system mobiles 10 is stored in a central database or home location register (HLR) 16 which may be accessed by the MSC to update the VLR whenever a mobile terminal enters the service area of the MSC.
The MSC provides a coupling between the mobile system and fixed networks, e.g. a PSTN 17 and a fixed packet data network 18 whereby mobile terminals 10 may access these networks.
In the mobile network, each subscriber terminal 10 is allocated a public data network number commonly referred to as the X.121 number. In one embodiment of our arrangement, the home location register 16 includes a facility for translating this X.121 number into the subscriber's international mobile station identity (IMSI). This provides a common initial point of contact with the packet data network and the administration of network resources is simplified by concentrating the information into a single entity.
In a second embodiment, a roaming data call number is employed for each subscriber terminal in this arrangement, the user's data call number terminates packet call data at the home location register 16. This data is then forwarded by the HLR for delivery to the user. To ensure routing of the data packet to the correct MSC 14 for delivery to the mobile terminal 10, the HLR changes the current address associated with the packet into a roaming data number that is then used to address the MSC currently serving the mobile terminal. This number is fixed in the network and routes the packet from the HLR to the serving MSC which is then responsible for forwarding the packet on the radio link with the mobile terminal's correct address. The mobile terminal 10 which is listening to the radio link can then recognise its own address and extract the data packet. Any response by the mobile can use its own address. Alternatively, a semi-permanent association may be made for the duration of the data transfer

Claims (6)

  1. CLAIMS: 1. A method of routing packet data from a packet data network to a mobile network subscriber served by a mobile switching centre, the method including providing the packet with a temporary address whereby the packet is routed via the mobile network to the mobile switching centre, and providing the packet on arrival at the mobile switching centre with the address of the mobile terminal whereby the packet is routed from the mobile switching centre to the terminal.
  2. 2. A method as claimed in claim 1, wherein each subscriber is allocated a respective data network number.
  3. 3. A method as claimed in claim 2, wherein a subscriber data network number is translated into the corresponding international mobile station identity.
  4. 4. A method as claimed in claim 1, wherein each subscriber terminal is allocated a roaming data number.
  5. 5. A method of routing packet data from a packet data network to a mobile subscriber substantially as described herein with reference to and as shown in the accompanying drawings.
  6. 6. A communications network substantially as described herein with reference to and as shown in the accompanying drawings.
GB9524585A 1995-12-01 1995-12-01 Providing Packet Data to a Mobile Communications System Withdrawn GB2307827A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9524585A GB2307827A (en) 1995-12-01 1995-12-01 Providing Packet Data to a Mobile Communications System
PCT/GB1996/002962 WO1997021313A1 (en) 1995-12-01 1996-11-29 Mobile packet data communications system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9524585A GB2307827A (en) 1995-12-01 1995-12-01 Providing Packet Data to a Mobile Communications System

Publications (2)

Publication Number Publication Date
GB9524585D0 GB9524585D0 (en) 1996-01-31
GB2307827A true GB2307827A (en) 1997-06-04

Family

ID=10784758

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9524585A Withdrawn GB2307827A (en) 1995-12-01 1995-12-01 Providing Packet Data to a Mobile Communications System

Country Status (1)

Country Link
GB (1) GB2307827A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995016330A1 (en) * 1993-12-10 1995-06-15 Telefonaktiebolaget Lm Ericsson Apparatuses and mobile stations for providing packet data communication in digital tdma cellular systems

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995016330A1 (en) * 1993-12-10 1995-06-15 Telefonaktiebolaget Lm Ericsson Apparatuses and mobile stations for providing packet data communication in digital tdma cellular systems

Also Published As

Publication number Publication date
GB9524585D0 (en) 1996-01-31

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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)