CA2608660A1 - Method and system using a conference bridge for handoff of a multi-mode mobile station - Google Patents

Method and system using a conference bridge for handoff of a multi-mode mobile station Download PDF

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Publication number
CA2608660A1
CA2608660A1 CA002608660A CA2608660A CA2608660A1 CA 2608660 A1 CA2608660 A1 CA 2608660A1 CA 002608660 A CA002608660 A CA 002608660A CA 2608660 A CA2608660 A CA 2608660A CA 2608660 A1 CA2608660 A1 CA 2608660A1
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Canada
Prior art keywords
mobile station
given
mode mobile
conference bridge
call
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Granted
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CA002608660A
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French (fr)
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CA2608660C (en
Inventor
John M. Everson
Jason R. Delker
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Sprint Spectrum LLC
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Individual
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H04L65/403—Arrangements for multi-party communication, e.g. for conferences
    • H04L65/4038—Arrangements for multi-party communication, e.g. for conferences with floor control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/42229—Personal communication services, i.e. services related to one subscriber independent of his terminal and/or location
    • H04M3/42246—Personal communication services, i.e. services related to one subscriber independent of his terminal and/or location where the subscriber uses a multi-mode terminal which moves and accesses different networks with at least one network having a wireline access including cordless PBX
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1446—Reselecting a network or an air interface over a different radio air interface technology wherein at least one of the networks is unlicensed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection

Abstract

A multi-mode mobile station includes a first interface for wireless communication with a wireless local area network (WLAN) and a second interface for wireless communication with a wireless wide area network (WWAN). The multi-mode mobile station is associated with a particular conference bridge, through which all calls to and from the multi-mode mobile station are routed. For example, when a call involving the multi-mode mobile is established via the WLAN, the call includes a WLAN call leg that extends from the conference bridge to the multi-mode mobile station via the WLAN. To effect a handoff during the call, a WWAN call leg is established between the multi-mode mobile station and the conference bridge via the WWAN. The conference bridge bridges the WLAN and WWAN call legs. To complete the handoff, the multi-mode mobile station drops the WLAN call leg and continues the call using the WWAN call leg.

Claims (20)

1. A method for effecting a handoff of a multi-mode mobile station from a first wireless network to a second wireless network, said multi-mode mobile station having a first interface for wireless communication with said first wireless network and a second interface for wireless communication with said second wireless network, said method comprising:

receiving a call request that requests establishment of a call between said multi-mode mobile station and an endpoint;

in response to said call request, establishing a first call leg between a conference bridge and said multi-mode mobile station via said first wireless network;

receiving a handoff request;

in response to said handoff request, establishing a second call leg between said conference bridge and said multi-mode mobile station via said second wireless network, said conference bridge bridging said first and second call legs; and dropping said first call leg.
2. The method of claim 1, wherein said call request originates from said multi-mode mobile station.
3. The method of claim 1, wherein said call request originates from said endpoint.
4. The method of claim 1, wherein said first wireless network is a wireless local area network (WLAN) and said second wireless network is a wireless wide area network (WWAN).
5. The method of claim 4, wherein said first call leg extends from said conference bridge to said multi-mode mobile station via a packet-switched network and said second call leg extends from said conference bridge to said multi-mode mobile station via said packet-switched network, a media gateway, and a circuit-switched network.
6. The method of claim 1, wherein said first wireless network is a wireless local area network (WWAN) and said second wireless network is a wireless wide area network (WLAN).
7. The method of claim 6, wherein said first call leg extends from said conference bridge to said multi-mode mobile station via a packet-switched network, a media gateway, and a circuit-switched network, and said second call leg extends from said conference bridge to said multi-mode mobile station via a packet-switched network.
8. The method of claim 1, further comprising:

said multi-mode mobile station transmitting said handoff request via said second wireless network.
9. The method of claim 8, wherein said handoff request is a request to originate a call to a predetermined handoff number.
10. A method for communicating with multi-mode mobile stations that can communicate with at least a first wireless network and a second wireless network, said method comprising:

associating each one of a plurality of said multi-mode mobile stations with a particular one of a plurality of conference bridges;

receiving a call request that requests establishment of a call between an endpoint and a given one of said plurality of multi-mode mobile stations;

in response to said call request, identifying a given conference bridge, from among said plurality of conference bridges, that is associated with said given multi-mode mobile station;
and establishing said call through said given conference bridge.
11. The method of claim 10, wherein associating each one of a plurality of said multi-mode mobile stations with a particular one of a plurality of conference bridges comprises:

defining a plurality of conference bridge identifiers, wherein each one of said conference bridge identifiers corresponds to a particular one of said plurality of conference bridges;

assigning to each one said plurality of multi-mode mobile stations a unique conference bridge identifier from among said plurality of conference bridge identifiers;
and storing for each one of said plurality of multi-mode mobile stations an association between a-mobile station identifier of said multi-mode mobile station and its conference bridge identifier.
12. The method of claim 11, wherein said call request identifies said given multi-mode mobile station by a given mobile station identifier.
13. The method of claim 12, wherein identifying a given conference bridge, from among said plurality of conference bridges, that is associated with said given multi-mode mobile station comprises:

determining which conference bridge identifier, from among said plurality of conference bridge identifiers, is associated with said given mobile station identifier of said given multi-mode mobile station, to obtain a given conference bridge identifier; and determining which conference bridge, from among said plurality of conference bridges, corresponds to said given conference bridge identifier.
14. The method of claim 13, wherein establishing said call through said given conference bridge comprises:

establishing a first call leg between said given conference bridge and said given multi-mode mobile station via said first wireless network.
15. The method of claim 14, further comprising:

receiving a handoff request that includes said given mobile station identifier of said given multi-mode mobile station.
16. The method of claim 15, further comprising, in response to said handoff request:

identifying said given conference bridge identifier from said given mobile station identifier;

identifying said given conference bridge from said given conference bridge identifier;
and establishing a second call leg between said given conference bridge and said given multi-mode mobile station via said second wireless network, said given conference bridge bridging said first and second call legs.
17. The method of claim 14, further comprising:

said given multi-mode mobile station detecting that said first call leg has been dropped and responsively transmitting a call re-establishment request that includes said given mobile station identifier of said given multi-mode mobile station;

identifying said given conference bridge identifier from said given mobile station identifier;

identifying said given conference bridge from said given conference bridge identifier;
and re-establishing said first call leg between said given conference bridge and said given multi-mode mobile station via either of said first and second wireless networks.
18. A system for providing wireless telecommunications for a plurality of multi-mode mobile stations, comprising:

a first wireless network;

a second wireless network;

a plurality of conference bridges communicatively coupled to said first and second wireless networks;

a database that associates each one of said plurality of multi-mode mobile stations with a particular one of said plurality of conference bridges; and a call control system communicatively coupled to said database and to said plurality of conference bridges, wherein said call control system selectively routes calls to and from said multi-mode mobile stations through their associated conference bridges.
19. The system of claim 18, wherein said plurality of conference bridges is provided by at least one media server.
20. The system of claim 19, wherein said at least one media server is communicatively coupled to said first wireless network via a packet-switched network and is communicatively coupled to said second wireless network via said packet-switched network, a media gateway, and a circuit-switched network.
CA2608660A 2005-05-26 2006-05-08 Method and system using a conference bridge for handoff of a multi-mode mobile station Active CA2608660C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11/138,180 US7466991B2 (en) 2005-05-26 2005-05-26 Method and system using a conference bridge for handoff of a multi-mode mobile station
US11/138,180 2005-05-26
PCT/US2006/017737 WO2006127255A1 (en) 2005-05-26 2006-05-08 Method and system using a conference bridge for handoff of a multi-mode mobile station

Publications (2)

Publication Number Publication Date
CA2608660A1 true CA2608660A1 (en) 2006-11-30
CA2608660C CA2608660C (en) 2011-11-01

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US (1) US7466991B2 (en)
CA (1) CA2608660C (en)
MX (1) MX2007014508A (en)
WO (1) WO2006127255A1 (en)

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WO2006127255A1 (en) 2006-11-30

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