WO2000072489A1 - Method for changing communication in a communication system, and communication system therefor - Google Patents

Method for changing communication in a communication system, and communication system therefor Download PDF

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Publication number
WO2000072489A1
WO2000072489A1 PCT/US2000/010525 US0010525W WO0072489A1 WO 2000072489 A1 WO2000072489 A1 WO 2000072489A1 US 0010525 W US0010525 W US 0010525W WO 0072489 A1 WO0072489 A1 WO 0072489A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
link
communication
station controller
communication system
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.)
Ceased
Application number
PCT/US2000/010525
Other languages
English (en)
French (fr)
Inventor
Stephen Lee Spear
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Priority to EP00923518A priority Critical patent/EP1183805B1/en
Priority to JP2000620773A priority patent/JP2003500983A/ja
Priority to DE60031977T priority patent/DE60031977T2/de
Publication of WO2000072489A1 publication Critical patent/WO2000072489A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node

Definitions

  • the invention relates generally to communication systems, and more particularly to a method for changing a communication path in a communication system.
  • a mobile station communicates with a mobile switching center via a base station subsystem.
  • the base station subsystem typically includes a of base station controller that is coupled to a transcoder.
  • the transcoder is coupled to the mobile switching center.
  • the mobile station may, at times, need to be handed over from its serving base station subsystem to a different target base station subsystem.
  • the target base station subsystem initiates the handover. If there is a problem with the signaling links between the base station controller and the mobile switching center, the call might be dropped. This is true even if the base station subsystems are capable of communicating with the mobile station.
  • the potential for valid traffic channels with a loss of signaling is growing with the separation of traffic signals from control signals.
  • the concept of keeping the handover within the base station subsystem solves a part of the problem, but not completely.
  • the loss of the signaling links could still cause the call to drop, even if the original base station controller is no longer involved with the call.
  • the call can be moved from one base station subsystem to another, but the call is not enabled from the base station subsystems, but rather from the core network.
  • a means to request the transfer of the call from one unit to another would require standardization in order to manage traffic in the access network. Connecting a base transceiver station to multiple base station controllers for redundancy to accommodate the failure of a base station controller solves the redundancy problem.
  • existing calls would drop due to the inability to inform the mobile switching center that the calls are still up but have been moved to a different base station subsystem.
  • FIG. 1 depicts a communication system in accordance with the preferred embodiment of the present invention.
  • FIG. 2 depicts a flow chart depicting preferred operation of the present invention.
  • the present invention provides a method for changing connection in a communication system.
  • the communication system includes a base station subsystem and a mobile switching center.
  • a communication is established between a mobile station and the mobile switching center.
  • the communication travels to the mobile switching center via a first link that includes a first base station controller. If it is determined that the first link is no longer the preferred link, such as when the link goes down or is inoperable, the communication is changed to a second link.
  • the second link is routed via a second base station controller located within the base station subsystem.
  • FIG. 1 a communication system 100 in accordance with the preferred embodiment of the present invention is depicted.
  • Communication system 100 is preferably a packet network utilizing an Internet Protocol (IP), but can alternately be any communication system that includes a base transceiver station in communication with multiple base station controllers. Communication system 100 can also include a hub or a common packet network.
  • IP Internet Protocol
  • Communication system 100 includes a base station subsystem (BSS) 102.
  • BSS base station subsystem
  • communication system 100 includes multiple base station subsystems coupled to MSC 120, but only one is depicted for clarity.
  • a link couples the two BSSs.
  • Such a system preferably includes an inter- BSS link coupling the first base station subsystem and the second base station subsystem.
  • BSS 102 preferably includes base transceiver station (BTS) 104, first base station controller (BSC) 106, second base station controller 107, first transcoder 108, and second transcoder 109.
  • BTS 104 is connected to first BSC 106 and to second BSC 107.
  • First BSC 106 is connected to first transcoder 108 and also to second transcoder 109.
  • Second BSC 107 is connected to first transcoder 108 and also to second transcoder 109.
  • Transcoders 108 and 109 route information to and from BSCs 106 and 107.
  • Transcoder 108 is connected to first BSC 106 and also to second BSC 107.
  • First transcoder 108 is also connected to MSC 120.
  • Second transcoder 109 is connected to first BSC 106 and second BSC 107, and is also connected to MSC 120. The information is routed to MSC 120 that provides switching functions for access to a PSTN or the like.
  • communication system 100 includes a common transcoder that is coupled to a first BSS and a second BSS.
  • BSS 102 is preferably coupled to mobile switching center (MSC) 120.
  • BSS 102 communicates with a mobile station.
  • the mobile station can be a mobile unit, a remote unit, a fixed wireless terminal, or any other unit capable of sending or receiving RF communications to or from BSS 102.
  • First link 110 includes first base station controller 106 and second link 112 includes second base station controller 107.
  • Second link 112 provides an alternate path for traffic from BTS 104 to MSC 120 via second BSC 107.
  • FIG. 2 depicts a flowchart 200 depicting preferred operation of the present invention.
  • Flowchart 200 details a method for changing connection in communication system 100.
  • a communication is established (201) between mobile station and mobile switching center 120.
  • Mobile station is preferably in communication with base station subsystem 102.
  • the communication preferably travels to mobile switching center 120 via first link 110 that includes first base station controller 106.
  • the system determines (203) whether the first link 110 is no longer the preferred link. If the first link 110 is no longer the preferred link, such as when the link has gone down, the communication is changed (205) to the second link 112.
  • Second link 112 includes second base station controller 107. This preferably appears to mobile switching center 120 that the mobile station has been handed off.
  • the present invention can also include the step of sending a handover complete message from second base station controller 107 to mobile switching center 120.
  • the handover complete message alerts mobile switching center 120 that the communication has been switched from first base station controller 106 to second base station controller 107.
  • This preferably entails rerouting the communication from first link 110 to second link 112.
  • the communication can be switched such that it is routed via BSC 107 and transcoder 109.
  • the present invention can also further include the step of alerting mobile switching center 120 that the communication has changed from first link 110 to second link 112.
  • the step of alerting mobile switching center 120 is preferably accomplished by sending a handover complete message to mobile switching center 120.
  • the step of alerting mobile switching center 120 is preferably accomplished after determining that first link 110 has gone down, or in other words, is currently inoperable.
  • the step of changing the communication to second link 112 is triggered by an improvement of the network connection, particularly in that of second link 112. Additionally, the link can be changed to improve traffic balancing.
  • the communication can be changed to a third link, if it is determined that second link 112 goes down.
  • This third link preferably comprises a third base station controller distinct from the first base station controller and the second base station controller.
  • the present invention therefore provides a method for changing communication in a communication system and the communication system therefor.
  • the original communication is established within a BSS via a first link that goes through a first BSC and a first transcoder.
  • the communication is rerouted within the BSS to a second BSC via a second link.
  • the second link is from the BTS to the second BSC and then to the first transcoder. In this manner, a communication can be changed and rerouted such that the communication is continued in adverse conditions. This will look like a handover to the MSC.
  • the present invention thereby aids end users and network operators in achieving higher levels of availability. Further, the present invention reduces the number of dropped calls due to network element outages .

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/US2000/010525 1999-05-20 2000-04-19 Method for changing communication in a communication system, and communication system therefor Ceased WO2000072489A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP00923518A EP1183805B1 (en) 1999-05-20 2000-04-19 Method for changing communication in a communication system, and communication system therefor
JP2000620773A JP2003500983A (ja) 1999-05-20 2000-04-19 通信システムにおいて通信を変更する方法およびそのための通信システム。
DE60031977T DE60031977T2 (de) 1999-05-20 2000-04-19 Verfahren und änderung der nachrichtenverbindung in einem nachrichtenübertragungssystem und zugehöriges nachrichtenübertragunssystem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/315,277 US6192037B1 (en) 1999-05-20 1999-05-20 Method for changing communication in a communication system, and communication system therefor
US09/315,277 1999-05-20

Publications (1)

Publication Number Publication Date
WO2000072489A1 true WO2000072489A1 (en) 2000-11-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/010525 Ceased WO2000072489A1 (en) 1999-05-20 2000-04-19 Method for changing communication in a communication system, and communication system therefor

Country Status (5)

Country Link
US (1) US6192037B1 (https=)
EP (1) EP1183805B1 (https=)
JP (1) JP2003500983A (https=)
DE (1) DE60031977T2 (https=)
WO (1) WO2000072489A1 (https=)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7420951B1 (en) 1999-11-12 2008-09-02 Nortel Networks Limited Packet-switched communications in a mobile network
US7006478B1 (en) * 2000-05-22 2006-02-28 Nortel Networks Limited Communicating over one or more paths in an interface between a base station and a system controller
US20020193105A1 (en) * 2001-06-13 2002-12-19 Olsson John Gunnar Dynamic Handling of orphan cells
US6909899B2 (en) * 2002-03-11 2005-06-21 Qualcomm, Incoporated Method and apparatus for handoff in a communication system supporting multiple service instances
AU2003247862A1 (en) * 2002-07-15 2004-02-02 Flarion Technologies, Inc. Methods and apparatus for improving resiliency of communication networks
US7929444B2 (en) * 2005-03-25 2011-04-19 Alcatel-Lucent Usa Inc. Communication nodes and methods using small routers to communicate over a backhaul facility
JP2019096195A (ja) * 2017-11-27 2019-06-20 富士ゼロックス株式会社 情報処理装置及び情報処理プログラム

Citations (5)

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Publication number Priority date Publication date Assignee Title
US5661724A (en) * 1995-12-18 1997-08-26 Ericsson Inc. Satellite diversity scheme
US5761619A (en) * 1995-03-23 1998-06-02 Telefoanktiebolaget Lm Ericsson Distributed telecommunications system
US5956641A (en) * 1998-03-30 1999-09-21 Motorola, Inc. System and method for facilitating a handoff of at least one mobile unit in a telecommunication system
US6049535A (en) * 1996-06-27 2000-04-11 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US6061565A (en) * 1996-04-02 2000-05-09 Hewlett-Packard Company Mobile radio systems

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WO1995008237A1 (en) * 1993-09-17 1995-03-23 Motorola, Inc. Method and apparatus for passing network device operations
BR9405716A (pt) * 1993-12-02 1995-12-19 Motorola Inc Processo para realizar comunicação ligada transcodificador fonte e transcodificador alvo
FI941125A7 (fi) * 1994-03-09 1995-09-10 Nokia Telecommunications Oy Matkaviestinjärjestelmä ja puhelunohjausmenetelmä
US5682416A (en) * 1995-05-09 1997-10-28 Motorola, Inc. Method and apparatus communication handover in a communication system
JPH10174144A (ja) * 1996-12-10 1998-06-26 Fujitsu Ltd 基地局収容及び収容変更方法
JPH10336721A (ja) * 1997-05-29 1998-12-18 Nippon Denki Ido Tsushin Kk 移動通信システム

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Publication number Priority date Publication date Assignee Title
US5761619A (en) * 1995-03-23 1998-06-02 Telefoanktiebolaget Lm Ericsson Distributed telecommunications system
US5661724A (en) * 1995-12-18 1997-08-26 Ericsson Inc. Satellite diversity scheme
US6061565A (en) * 1996-04-02 2000-05-09 Hewlett-Packard Company Mobile radio systems
US6049535A (en) * 1996-06-27 2000-04-11 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US5956641A (en) * 1998-03-30 1999-09-21 Motorola, Inc. System and method for facilitating a handoff of at least one mobile unit in a telecommunication system

Non-Patent Citations (1)

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Title
See also references of EP1183805A4 *

Also Published As

Publication number Publication date
DE60031977T2 (de) 2007-07-12
EP1183805B1 (en) 2006-11-22
JP2003500983A (ja) 2003-01-07
US6192037B1 (en) 2001-02-20
EP1183805A4 (en) 2004-04-28
DE60031977D1 (de) 2007-01-04
EP1183805A1 (en) 2002-03-06

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