EP1186142A1 - Zuteilungsdienst für die zuteilung von clients über ein paketvermittelten netz - Google Patents

Zuteilungsdienst für die zuteilung von clients über ein paketvermittelten netz

Info

Publication number
EP1186142A1
EP1186142A1 EP00916445A EP00916445A EP1186142A1 EP 1186142 A1 EP1186142 A1 EP 1186142A1 EP 00916445 A EP00916445 A EP 00916445A EP 00916445 A EP00916445 A EP 00916445A EP 1186142 A1 EP1186142 A1 EP 1186142A1
Authority
EP
European Patent Office
Prior art keywords
dispatch
packet
group
multicast
switched 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.)
Withdrawn
Application number
EP00916445A
Other languages
English (en)
French (fr)
Other versions
EP1186142A4 (de
Inventor
Timothy J. Sherburne
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
Publication of EP1186142A1 publication Critical patent/EP1186142A1/de
Publication of EP1186142A4 publication Critical patent/EP1186142A4/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6472—Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6481—Speech, voice

Definitions

  • the present invention relates generally to communication systems and. in particular, to a method and apparatus for providing dispatch service to dispatch clients via a packet-switched network.
  • Wireless communication systems and specifically wireless dispatch systems, are known.
  • Such wireless dispatch systems provide dispatch services that allow groups of mobile users to communicate spontaneously as a group without the need for arranging a conference call.
  • each group member In today's wireless dispatch systems, each group member must carry a radio-phone device, and remain within the coverage area of the dispatch system to maintain communication with the group.
  • FIG. 1 is a block diagram depiction of a communication system in accordance with a preferred embodiment of the present invention.
  • dispatch service can be provided to dispatch clients in addition to wireless devices.
  • the present invention encompasses a method for a dispatch client to obtain dispatch service from a communication infrastructure, wherein the dispatch client is connected to the communication infrastructure via a multicast capable, packet-switched network.
  • the dispatch client receives via a designated multicast group on the multicast capable, packet-switched network an indication that a dispatch group is active on a multicast group.
  • the dispatch client " receives via the multicast group a packet containing voice information corresponding to the dispatch group.
  • the dispatch client generates a voice signal corresponding to the dispatch group using the packet.
  • the present invention encompasses a network dispatch manager apparatus.
  • the network dispatch manager apparatus comprises a wireless communication system interface that receives a voice signal corresponding to a dispatch group.
  • communication system 100 comprises an "iDEN” communication system, all components of which are commercially available from “MOTOROLA”, Inc. of Schaumburg, Illinois.
  • Base sites 112 and 114 preferably comprise "iDEN” Enhanced Base Transceiver System (EBTS) sites, and dispatch controller 102 preferably comprises an
  • mobile wireless communication units 134, 136, and 138 preferably comprise “iDEN” wireless phones.
  • the packet-switched network 124 is the worldwide Internet and dispatch clients 130 and 132 comprise computer devices such as personal computers that are connected to the Internet while executing a dispatch client application program.
  • a preferred network dispatch manager comprises a computer telephony platform such as that used by the "iDEN” DAP.
  • Such computer telephony platforms comprise conventional circuitry operated and controlled by routinely developed software, such as the circuitry and software used in central processing units and network interface cards (NICs).
  • network dispatch manager 101 preferably interfaces with the Internet via interface 116, and dispatch clients 130 and 132 preferably interface with the Internet via interfaces 126 and 128, respectively
  • a wireless communication system interface 109 of the network dispatch manager 101 receives a voice signal corresponding to a dispatch group via interface 104
  • the voice signal preferably comprises speech encoded using Vector Sum Excited Linear Predicting (VSELP) compression
  • VSELP Vector Sum Excited Linear Predicting
  • the speech information corresponds to a dispatch group
  • the dispatch group may comprise any group of mobile wireless communication units and/or dispatch clients, consider, for the purpose of illustration, that the dispatch group comprises mobile wireless communication unit 134 and dispatch client 130
  • a processor 110 of the network dispatch manager 101 When a group dispatch call is established, a processor 110 of the network dispatch manager 101 preferably assigns a multicast group to the dispatch group and stores the assignment The processor 110 also instructs a packet-switched network interface 111 of the network dispatch manager 101 to broadcast information that indicates that the multicast group is currently assigned to the dispatch group using a designated multicast group on the packet-switched network 124.
  • the designated multicast group is preferably registered to by each dispatch client served by the network dispatch manager.
  • the processor 110 bundles a portion of the voice signal into a packet for transport via the packet-switched network 124.
  • a portion of the VSELP information is extracted from the voice signal and used to create an internet protocol (IP) packet.
  • IP internet protocol
  • all of the VSELP information would be packetized as such to form as many IP packets as necessary to convey the voice signal via the packet-switched network 124.
  • the voice signal may be converted to comply with the International Telecommunications Union (ITU) H.323 multimedia standard as it is reformated into IP packets.
  • ITU International Telecommunications Union
  • Processor 110 of the network dispatch manager 01 determines the multicast group that is assigned to the dispatch group, preferably by retrieving the assignment information stored when the multicast group was assigned to the dispatch group. Processor 110 then instructs the packet-switched network interface 111 to broadcast the packet to at least one dispatch client via the multicast capable, packet-switched network 124 using the multicast group.
  • a network dispatch manager apparatus provides dispatch service to dispatch clients.
  • FIG. 2 is a logic flow diagram 200 of steps executed by a network dispatch manager in accordance with a preferred embodiment of the present invention.
  • the logic flow begins (202) when a network dispatch manager in a communication infrastructure receives (204) registration information from a dispatch client.
  • the registration information comprises the dispatch group and indicates that the dispatch client is registering with the network dispatch manager as a member of a particular dispatch group.
  • the network dispatch manager in response to receiving the registration information, registers the dispatch client to the dispatch group with a dispatch controller in the communication infrastructure.
  • the dispatch controller which preferably performs call processing and dispatch call control functions, is thus notified of the dispatch client's registration to the dispatch group.
  • the network dispatch manager assigns (208) a multicast group to the dispatch group.
  • the network dispatch manager then broadcasts (210) information using a designated multicast group, indicating that the dispatch group is active and that the dispatch group is using the multicast group.
  • the network dispatch manager broadcasts the information to the dispatch clients registered to the designated multicast group via a multicast capable, packet-switched network.
  • the network dispatch manager receives (212) a voice signal corresponding to the dispatch group.
  • the voice signal preferably comprises encoded speech information originating from either a mobile wireless communication unit registered to the dispatch group or from a dispatch client registered to the dispatch group.
  • the network dispatch manager determines (214) the multicast group that is assigned to the dispatch group and bundles (216) a portion of the voice signal into a packet for transport.
  • the network dispatch manager then broadcasts (218) the packet to the dispatch client using the multicast group on the multicast capable, packet-switched network.
  • all dispatch clients registered to the dispatch group will receive the contents of the packet via the multicast group on the packet-switched network.
  • the voice signal a first voice signal
  • a user of a dispatch client taking part in the dispatch call may wish to speak to the dispatch group.
  • the network dispatch manager in such a scenario, would receive (220) a dispatch talk request for the dispatch group from such a dispatch client.
  • the network dispatch manager would further receive (222) a voice packet from such a dispatch client via the packet-switched network.
  • the network dispatch manager Upon receiving the voice packet, the network dispatch manager generates (223) a second voice signal, from the information contained in the voice packet, for transmission within the communication infrastructure. The second voice signal is then preferably transmitted to the mobile wireless communication units of the dispatch group via communication infrastructure transmitters Also upon receiving the voice packet, the network dispatch manager generates (224) a second voice packet from the voice information contained in the voice packet and broadcasts (226) the second voice packet to the dispatch clients of the dispatch group using the multicast group In the preferred embodiment, therefore, the speech information contained in voice packets received from a dispatch client is forwarded to the other dispatch clients of the dispatch group via the multicast group and routed through the communication infrastructure for transmission to mobile wireless communication units of the dispatch group Thus, the preferred logic flow ends (228)
  • FIG 3 is a logic flow diagram 300 of steps executed by a dispatch client in accordance with a preferred embodiment of the present invention
  • the logic flow begins (302) when the dispatch client receives (304) via a designated multicast group an indication that a dispatch group is active on a multicast group Upon receiving the indication, the dispatch client preferably registers to receive the multicast group messaging and receives (306) via the multicast group a packet containing voice information corresponding to the dispatch group Using the packet, the dispatch client then generates (308) a voice signal corresponding to the dispatch group
  • the packet comprises VSELP information that is extracted to form the voice signal, wherein the voice signal comprises VSELP encoded speech information that is converted to audio in substantially the same manner that mobile wireless communication units convert VSELP encoded speech information to audio today
  • the packet may comprise speech information encoded according other voice/multimedia standards such as the ITU
  • the dispatch client preferably transmits (310) a dispatch talk request for the dispatch group to the communication infrastructure via the multicast capable, packet-switched network
  • the dispatch client bundles (312) a portion of a second voice signal, generated from audio received by the dispatch client, into a second packet for transport via the multicast capable, packet-switched network
  • the second voice signal comprises VSELP encoded speech information that is used to create the second packet according to the internet protocol
  • the second voice signal may alternatively be converted to comply with the International Telecommunications Union (ITU) H 323 multimedia standard as it is reformated into IP packets
  • dispatch ciient transmits (314) the second packet to the communication infrastructure and the logic flow ends (316)

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)
EP00916445A 1999-05-28 2000-03-16 Zuteilungsdienst für die zuteilung von clients über ein paketvermittelten netz Withdrawn EP1186142A4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US322675 1994-10-13
US32267599A 1999-05-28 1999-05-28
PCT/US2000/007034 WO2000074326A1 (en) 1999-05-28 2000-03-16 Dispatch service to dispatch clients via a packet-switched network

Publications (2)

Publication Number Publication Date
EP1186142A1 true EP1186142A1 (de) 2002-03-13
EP1186142A4 EP1186142A4 (de) 2003-04-16

Family

ID=23255930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00916445A Withdrawn EP1186142A4 (de) 1999-05-28 2000-03-16 Zuteilungsdienst für die zuteilung von clients über ein paketvermittelten netz

Country Status (4)

Country Link
EP (1) EP1186142A4 (de)
AR (1) AR029363A1 (de)
BR (1) BR0011018A (de)
WO (1) WO2000074326A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5416770A (en) * 1993-09-15 1995-05-16 Motorola, Inc. Method and apparatus for establishing dispatch audio communication in a communication system
US5761193A (en) * 1996-05-31 1998-06-02 Derango; Mario F. Method for pre-establishing communications in a wireless communication network

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2129038T3 (es) * 1992-11-27 1999-06-01 Ibm Encaminamiento a destinos multiples entre dominios.
US5825759A (en) * 1994-10-26 1998-10-20 Telefonaktiebolaget Lm Ericsson Distributing network services and resources in a mobile communications network

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5416770A (en) * 1993-09-15 1995-05-16 Motorola, Inc. Method and apparatus for establishing dispatch audio communication in a communication system
US5761193A (en) * 1996-05-31 1998-06-02 Derango; Mario F. Method for pre-establishing communications in a wireless communication network

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
See also references of WO0074326A1 *
THOM G A: "H. 323: THE MULTIMEDIA COMMUNICATIONS STANDARD FOR LOCAL AREA NETWORKS" IEEE COMMUNICATIONS MAGAZINE, IEEE SERVICE CENTER. PISCATAWAY, N.J, US, vol. 34, no. 12, 1 December 1996 (1996-12-01), pages 52-56, XP000636454 ISSN: 0163-6804 *
XYLOMENOS G ET AL: "IP multicasting for wireless mobile hosts" MILITARY COMMUNICATIONS CONFERENCE, 1996. MILCOM '96, CONFERENCE PROCEEDINGS, IEEE MCLEAN, VA, USA 21-24 OCT. 1996, NEW YORK, NY, USA,IEEE, US, 21 October 1996 (1996-10-21), pages 933-937, XP010204037 ISBN: 0-7803-3682-8 *

Also Published As

Publication number Publication date
EP1186142A4 (de) 2003-04-16
WO2000074326A1 (en) 2000-12-07
AR029363A1 (es) 2003-06-25
BR0011018A (pt) 2002-02-19

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