EP1142422A1 - Systeme de communication configurable a possibilites basees sur le protocole internet (ip) - Google Patents

Systeme de communication configurable a possibilites basees sur le protocole internet (ip)

Info

Publication number
EP1142422A1
EP1142422A1 EP99967499A EP99967499A EP1142422A1 EP 1142422 A1 EP1142422 A1 EP 1142422A1 EP 99967499 A EP99967499 A EP 99967499A EP 99967499 A EP99967499 A EP 99967499A EP 1142422 A1 EP1142422 A1 EP 1142422A1
Authority
EP
European Patent Office
Prior art keywords
cell
cells
service
mobile station
capabilities
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Withdrawn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
EP99967499A
Other languages
German (de)
English (en)
Inventor
Subhankar Ray
Eric Valentine
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.)
Ericsson Inc
Original Assignee
Ericsson Inc
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 Ericsson Inc filed Critical Ericsson Inc
Publication of EP1142422A1 publication Critical patent/EP1142422A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols

Definitions

  • the present invention relates generally to communication systems, and, more particularly, to a system and method for configuring the method of communication in a wireless communication system having Internet Protocol (IP) based capabilities.
  • IP Internet Protocol
  • Mobile wireless communication is becoming increasingly important for providing safety, convenience, improved productivity, and simple conversational pleasure.
  • One prominent mobile wireless communication option is cellular communication.
  • Cellular phones for instance, can be found in cars, briefcases, purses and even pockets.
  • a mobile station In a mobile cellular telecommunications system, a mobile station normally communicates with the base station corresponding to the cell area in which the mobile station is located. There are circumstances, however, under which communication with the mobile station changes from one cell within the telecommunications network to another.
  • a first situation is a handover operation in which the a mobile station roams into another cell while in a telephone call or other transaction. In order to choose a best cell for use by the roaming mobile station, signal strength measurements of cell signal transmissions are performed by the roaming mobile station.
  • a second situation in which communication with a mobile station or terminal changes from one cell to another is a part of the Idle Mode procedures of the terminal/mobile station.
  • This process by which a terminal chooses which cell to utilize, is referred to as "camping on” a cell.
  • the process includes location updating so that the serving mobile switching center (MS C) and corresponding visitor location register (NLR) maintain the approximate location ofthe terminal.
  • the "camping on” process may, for example, occur when aterminal is powered up .
  • the camping process may also occur when a terminal is not engaged in a telephone call but is moving around and monitoring the transmission quality ofthe different cells. In the event the terminal changes location areas while monitoring the quality ofthe cell transmissions, the terminal will perform a location update.
  • cellular wireless networks For cellular phone system providers to offer cellular phone users new services, cellular wireless networks must be upgraded. To this end, there exist and/or are planned wireless telecommunication networks which are capable of providing both standard GSM services and IP based services and/or applications.
  • One advantage provided by such networks is that they are backwards compatible. In other words, the network provides both GSM services and IP applications, such as VoIP, to terminals which are capable of accessing IP based applications while at the same time maintaining conventional GSM wireless communication services for terminals which cannot utilize IP applications, such as due to limitations ofthe terminal itself.
  • VoIP voice over IP
  • NoIP over the current Internet, for example, can provide acceptable voice communications at a greatly reduced cost to the user, when compared to traditional mobile telephone tolls.
  • the above-described wireless network is not without its shortcomings. For instance, if a caller wishes to make a call in a wireless network having a VoIP application, a circuit switched call is transmitted from the corresponding Base Station System to the Mobile Switching Center (MSC), which is then sent along a trunk from the MSC to a gateway connected to an Internet Service Provider (ISP) .
  • the gateway converts the call from a circuit switched voice call to a packet switched call for transmission on the Internet.
  • ISP Internet Service Provider
  • the NoIP call nonetheless utilizes circuit switch transmission resources in handling the call . Accordingly, there is a need for placing the point at which access is made to the Internet closer to the terminal and/or mobile station within the mobile communications network.
  • One approach is to place an interface for accessing the Internet within the Base Station Controllers (BSC) so that the switching circuitry ofthe network is substantially bypassed when an IP based application is provided to a mobile station user.
  • BSC Base Station Controllers
  • some ofthe cells in the network may be capable of providing IP based applications and/or communications, such as NoIP, in addition to conventional GSM based communication.
  • a call placed by a terminal and/or mobile station served by these cells, for example, is capable of being transported over/through the Internet so as to incur a relatively inexpensive toll. Because not every BSC in the mobile network will typically possess the capability to provide IP based services and/or applications to mobile stations served thereby, there exists a need for ensuring that terminals requesting an IP based service are satisfactorily and cost effectively served.
  • the present invention overcomes shortcomings in existing communication systems and satisfies a significant need for a communication system having improved methods for accessing the system's IP based capabilities.
  • a mobile communications network such as, for example, a Public Land Mobile Network (PLMN), divided into a number of cells which communicate with at least one MSC via a number ofbase stations.
  • At least one base station is capable of accessing an IP based application, such as VoIP by including a transcoder to convert a voice call transmitted by a terminal into a packet switched call for transport over the Internet.
  • IP based application such as VoIP
  • the cells associated with each base station transmit their service capabilities, including its IP-based capabilities, so that a terminal receiving the transmission is aware ofthe service capabilities of its present cell and neighboring cells.
  • each terminal in the mobile communications network transmits its own capabilities, such as being IP capable, to the network. In this way, both the network and each terminal can be apprised of each other's capabilities so that decisions pertaining to providing service-related activities, such as transporting a telephone call, are effectively carried out.
  • the present invention further includes each terminal possessing an interface and necessary circuitry to facilitate the user in selecting a cell preference from among cells which only support GSM-related services and cells which support both GSM-related services and
  • the interface may allow the user to prefer cells which support NoIP for transporting telephone calls placed by the user's mobile station over the Internet.
  • the system selects a cell for providing a service to the terminal, such as transporting a telephone call placed thereby, based in part upon the service-related capabilities of cells in the immediate area of the terminal and upon the selected cell preference.
  • the present communications system suitably matches its available services to the user's service preferences.
  • Figure 1 is a block diagram of a telecommunications system according to the present invention
  • Figure 2 is a block diagram of a terminal according to the present invention
  • Figure 3 is a flow chart illustrating a handover operation in association with the present invention
  • Figure 4 is a flow chart illustrating a cell reassignment operation in association with the present invention
  • Figure 5 is a flow chart illustrating a location update operation in association with the present invention.
  • Mobile communications network 2 may preferably include a plurality of interconnected MSCs 4, each of which communicates with one or more base station controllers (BSC) 5.
  • BSC base station controllers
  • BTS 5 communicates with at least one base transceiver station (BTS) 6.
  • BTS base transceiver station
  • a single BTS 6 serves one or more cells in mobile communications network 2.
  • MSCs 4, BSCs 5 and BTSs 6 are known in the art and will not be described herein for reasons of simplicity.
  • One or more BSCs 5 of mobile communications network 2 may be capable of accessing IP network 3 in order to provide one or more IP applications to subscribers of the mobile communications network 2.
  • a BSC 5 may, for example, have access to IP network 3 using one or more Internet Service Providers (ISP) 7.
  • ISP Internet Service Providers
  • One IP application which a B SC 5 preferably accesses and is capable of providing to subscribers of mobile communications network 2 is VoIP, which provides acceptable voice communications at a greatly reduced subscriber cost, as explained above.
  • the BSCs 5 which are capable of providing NoIP to subscribers ofthe mobile communications network 2 include a transcoder unit 8 or other device which converts a circuit switched (GSM) voice call to a packet switched call for transport over the Internet.
  • GSM circuit switched
  • transcoder unit 8 By including transcoder unit 8 within aBSC 5, aVoIP telephone call placed by a terminal 9, such as a mobile station, bypasses the switching circuitry (MSCs 4) of mobile communications network 2. It is understood that a cell may be capable of accessing a number of IP based applications in addition to VoIP through its corresponding B SC 5. For instance, a cell in mobile communications network 2 may be capable of accessing an H.323 based multimedia application.
  • the present invention allows subscribers of mobile communications network 2 to more effectively access communication services provided by mobile communications network 2 and IP network 3. It is understood that not every BSC 5 may be capable of accessing IP network 3. It is also understood that a BSC 5 which may be capable of accessing IP network 3 may typically be capable of accessing a limited number of IP applications. For instance, an IP capable BSC 5 may utilize a specific ISP 7 in accessing IP network 3. Due to the fact that BSCs of mobile communications network 2 and thus the cells corresponding thereto provide different IP applications and/or possess different IP based capabilities, the present invention allows a subscriber of mobile communications network 2 to select preferred capabilities for a cell to possess in order to communicate therewith.
  • the present invention allows a subscriber to identify a preference for a cell/B S C which supports particular IP based applications with which the subscriber may communicate.
  • the mobile communications network 2 utilizes the identified cell preference in selecting a cell to communicate with the subscriber's terminal 9, such as when mobile communications network 2 performs cell handover procedures or while camping-on a cell.
  • information regarding network 2 is preferably transmitted to terminal 9.
  • the information transmitted by mobile communications network 2 to a terminal 9 preferably informs terminals 9 ofthe capabilities of each cell.
  • mobile communications network 2 provides a list of services and/or applications, including IP based applications, which are accessible thereby.
  • the Broadcast Control Channel is modified to include this cell capability information.
  • a terminal 9 upon receiving the cell capability broadcast, is capable of deterrniningthe cell capabilities ofthe cell presently serving terminal 9 and its neighboring cells.
  • terminal 9 preferably includes an interface 20 which is coupled to transceiver
  • 22 preferably further displays the presently assigned cell, its capabilities, and/orthe service being provided to the subscriber.
  • terminal 9 allows for the selection or identification of a cell preference for use in assigning te ⁇ riinal 9 to a cell, such as during a handover procedure or while camping- on a cell.
  • the cell preference may be entered into terminal 9 by the subscriber using keypad
  • the cell preference maybe stored, either permanently or otherwise, on a SIM card 24 which is operatively coimectible to terminal 9.
  • a SIM card 24 which is operatively coimectible to terminal 9.
  • the present invention allows mobile communications network 2 ( Figure 1) to determine the capabilities of terminals 9 located therein.
  • a terminal 9 preferably communicates to mobile communications network 2 its IP based capabilities.
  • the information may indicate whether terminal 9 complies with a certain suite of specifications, such as H.323 or SIP.
  • Terminal capability information may be utilized by mobile communications network 2 in reaching cell assignment decisions, such as during cell handover or camping on a cell, by giving greater preference to assigning an IP capable cell to a terminal 9 which prefers communication with an IP capable cell and which itself is IP capable.
  • Specific channel types or target cells could be selected for assignment to a terminal 9 based upon the terminal capability information.
  • the IP based capabilities of a terminal 9 are added to the GSM classmark corresponding to terminal 9 for communication to mobile communications network 2.
  • the subscriber profile stored in a Home Location Register (HLR) 10, may preferably indicate whether IP support for a terminal 9 is preferred or forbidden. This profile information may be downloaded and used together with the terminal capability information in the classmark in assigning a cell to serve terminal 9.
  • HLR Home Location Register
  • terminal 9 monitors the signal strength of cells in the area thereof at step 30. In the event one or more cells whose transmissions terminal 9 measured is a preferred cell or otherwise possesses preferred communication capabilities, terminal 9 sends preferred cell capability information to mobile communications network 2 at step 31. For example, terminal 9 may send a cell preference listing to mobile communications network 2. Next, if mobile communications network 2 determines that, based upon the preferred cell information sent by terminal 9, the new cell for communicating with terminal 9 is associated with a different BSC 5, then the channel preference corresponding to the cell capability preferences is sent to the B SC 5 corresponding to the new cell at step 32. In this way, BSC 5 is aware of the preferred channel type and equipment which is needed to support it.
  • the serving MSC 4 may not know the preferred channel type corresponding to the preferred cell capability preference of terminal 9. Consequently, MSC verifies that the preferred cell capability for the best cell is possible at step 33. If the preferred cell capability preference is not possible and/or compatible, then the handover operation to the selected cell is rejected at step 34. Alternatively, if it is determined that the preferred cell capability preference is possible for the best cell, then terminal 9 is handed over thereto at step 35.
  • FIG. 4 illustrates the process for selecting a cell for terminal 9 while "camping on” a cell.
  • each base transceiver station (BTS) 6 broadcasts the IP capabilities, if any, for the cells corresponding thereto for reception by terminal 9 at step 41.
  • interface 20 interprets the cell IP capability information and displays the information on display 21 at step 42.
  • a cell capability preference may be identified at step 43. This identification may be undertaken by the subscriber manually entering the cell capability preference using terminal keypad 23 or by terminal 9 reading the cell preference from SIM card 24 connected thereto.
  • terminal 9 In the event terminal 9 has indicated to mobile communications network 2 that terminal 9 is to be camped onto a cell selected or preferred thereby, then terminal 9 is camped onto the selected cell at step 44. If the cell camped onto during step 44 is in a new location area, then a location update is performed at step 45.
  • MSC 4 receives and stores the classmark therefor at step 52.
  • the classmark may include cell capability preference information for terminal 9. If it is determined that terminal 9 is not registered with MSC 4, MSC 4 notifies the HLR 10 corresponding to terminal 9.
  • HLR 10 thereupon sends data pertaining to terminal 9 and including its cell capability preferences to MSC 4 at step 53. Thereafter, the subscriber prol-Ue for terminal 9 is stored within MSC 4 and/or its corresponding VLR at step 54.

Abstract

La présente invention concerne un système et un procédé destinés à un abonné d'un système de communication par mobile afin d'identifier sélectivement une préférence pour des cellules ayant une possibilité d'accès à une application IP. Le système utilise la préférence de possibilité de cellule identifiée par attribution d'une cellule à l'abonné. Le système diffuse, auprès de l'abonné, les possibilités, basées sur l'IP, de ses cellules afin de faciliter l'identification de la préférence de possibilité de cellule. Le terminal de l'abonné émet vers le système les possibilités du terminal basées sur l'IP afin de faciliter le procédé d'attribution de la cellule.
EP99967499A 1998-12-23 1999-12-21 Systeme de communication configurable a possibilites basees sur le protocole internet (ip) Withdrawn EP1142422A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US22130398A 1998-12-23 1998-12-23
US221303 1998-12-23
PCT/US1999/030569 WO2000040053A1 (fr) 1998-12-23 1999-12-21 Systeme de communication configurable a possibilites basees sur le protocole internet (ip)

Publications (1)

Publication Number Publication Date
EP1142422A1 true EP1142422A1 (fr) 2001-10-10

Family

ID=22827245

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99967499A Withdrawn EP1142422A1 (fr) 1998-12-23 1999-12-21 Systeme de communication configurable a possibilites basees sur le protocole internet (ip)

Country Status (5)

Country Link
EP (1) EP1142422A1 (fr)
JP (1) JP2002534874A (fr)
AU (1) AU2376800A (fr)
CA (1) CA2356839A1 (fr)
WO (1) WO2000040053A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4404371B2 (ja) * 2001-06-08 2010-01-27 財団法人流通システム開発センタ− Ｉｐ網を用いた通信システム
JP3936172B2 (ja) * 2001-11-08 2007-06-27 沖電気工業株式会社 交換システム
US8467792B2 (en) * 2006-06-27 2013-06-18 Qualcomm Incorporated Method and apparatus for maintaining call continuity in wireless communication
EP2449824B1 (fr) * 2009-06-30 2016-10-05 Telefonaktiebolaget LM Ericsson (publ) Traitement d'informations de capacité d'accès dans un réseau mobile
WO2018029939A1 (fr) 2016-08-12 2018-02-15 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Terminal, station de base, et procédé de communication

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353332A (en) * 1992-09-16 1994-10-04 Ericsson Ge Mobile Communications Inc. Method and apparatus for communication control in a radiotelephone system
FI106671B (fi) * 1995-03-13 2001-03-15 Nokia Mobile Phones Ltd Matkaviestinkokonaisuus, matkaviestinpäätelaite ja menetelmä yhteyden muodostamiseksi matkaviestinpäätelaitteelta
US5802469A (en) * 1995-03-29 1998-09-01 Kabushiki Kaisha Toshiba Radio communication system selectable low speed bi-directional communication and high-speed down link communication
US5845215A (en) * 1995-10-18 1998-12-01 Telefonaktiebolaget Lm Ericsson Operating mobile stations of wireless communication systems in multiple modes by external control
SE9702266L (sv) * 1997-06-13 1998-12-14 Telia Ab DECT-terminal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0040053A1 *

Also Published As

Publication number Publication date
WO2000040053A1 (fr) 2000-07-06
AU2376800A (en) 2000-07-31
JP2002534874A (ja) 2002-10-15
CA2356839A1 (fr) 2000-07-06

Similar Documents

Publication Publication Date Title
US7236784B2 (en) Method of and system for selecting a PLMN for network sharing
US6424638B1 (en) System and method for performing an inter mobile system handover using the internet telephony system
AU728172B2 (en) Mobile communications network
US5983092A (en) Method and apparatus for system selection
US6708028B1 (en) Multi-mode radio telephone
US8554219B2 (en) Method of selecting a network by a mobile apparatus
EP1175119A2 (fr) Sélection de réseau dans un système de communication mobile
US6188897B1 (en) Mobile station roaming in a multiple service provider area
KR20010072183A (ko) 최고 서비스 제공자를 선택하기 위한 지능형 로밍 방법을이용하는 이동 단말기
US20060099943A1 (en) Apparatus and method for receiving improved roaming service in a mobile terminal
CN104838699A (zh) Ran控制的wi-fi选择
US5819173A (en) Dynamically reconfigurable wireless communicator
JP2006246409A (ja) 携帯端末、通信システム、通信網選択方法、及びプログラム
US6321085B1 (en) System and method for selecting a voice service option
WO2000040053A1 (fr) Systeme de communication configurable a possibilites basees sur le protocole internet (ip)
KR19990037205A (ko) 무선 통신 시스템과, 이러한 시스템에서의 무선 이동 설비, 및 동일한 커버 영역에서 동작하는 이러한 무선 통신 시스템들로부터 한 개의 시스템을 선택하는 방법
EP1432266B1 (fr) Procédé de fonctionnement d'un service de communication de données dans un système de communication mobile
EP0948874B1 (fr) Selection dynamique de reseau sans fil offrant une fonction de service desiree
GB2369004A (en) Connecting to a PLMN having Localized Service Areas
WO1997024006A1 (fr) Renvoi automatique des appels dans un radiotelephone mobile

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010601

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: VALENTINE, ERIC

Inventor name: RAY, SUBHANKAR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ERICSSON INC.

17Q First examination report despatched

Effective date: 20070802

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20071213