WO2001035604A2 - METHOD FOR PROVIDING IP TELEPHONY WITH QoS USING END-TO-END RSVP SIGNALING - Google Patents
METHOD FOR PROVIDING IP TELEPHONY WITH QoS USING END-TO-END RSVP SIGNALING Download PDFInfo
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- WO2001035604A2 WO2001035604A2 PCT/US2000/030446 US0030446W WO0135604A2 WO 2001035604 A2 WO2001035604 A2 WO 2001035604A2 US 0030446 W US0030446 W US 0030446W WO 0135604 A2 WO0135604 A2 WO 0135604A2
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- WIPO (PCT)
- Prior art keywords
- policy
- sip
- qos
- server
- client
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
- H04L63/104—Grouping of entities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/15—Flow control; Congestion control in relation to multipoint traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2408—Traffic characterised by specific attributes, e.g. priority or QoS for supporting different services, e.g. a differentiated services [DiffServ] type of service
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/72—Admission control; Resource allocation using reservation actions during connection setup
- H04L47/724—Admission control; Resource allocation using reservation actions during connection setup at intermediate nodes, e.g. resource reservation protocol [RSVP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/801—Real time traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/805—QOS or priority aware
-
- 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
- H04L65/1069—Session establishment or de-establishment
-
- 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
- H04L65/1104—Session initiation protocol [SIP]
-
- 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
- H04L65/80—Responding to QoS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
- H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
- H04M7/1275—Methods and means to improve the telephone service quality, e.g. reservation, prioritisation or admission control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
- H04Q3/0025—Provisions for signalling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13034—A/D conversion, code compression/expansion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13166—Fault prevention
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13204—Protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13348—Channel/line reservation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13389—LAN, internet
Definitions
- the present inv ention relates generally to the field ot IP communication, and more particularly to a method tor providing Internet Protocol (IP) telephony with quality ot service
- IP Internet Protocol
- IP communications such as IP telephony and other IP communication services will require a quality of service (QoS) equal to or better than that currently available on digital circuit switched networks
- QoS quality of service
- Session Initiation Protocol was developed for call setup.
- Open Settlement Protocol (OSP) was developed for authorization and usage reporting, common Outsourcing Policy Service (COPS) was developed for policy deployment in network elements.
- RSVP Resource Reservation Protocol
- SBM Subnet Bandwidth manager
- DiffServ Differentiated Services
- a method for implementing IP telephone with QoS using end-to-end RSVP signaling that comprises the transfer of a unique sequence of messages prior to, during, and after IP communications. The sequence is not arbitrary as the parameters communicated in a previous message may be used in the follow-up messages. While the message exchanges for the protocols listed above are well documented and understood when each is used in isolation, this is not the case when they are used together.
- the present invention discloses a method whereby the separate protocols are used together to setup, maintain, and teardown Internet communications having an acceptable
- QoS This is accomplished by dynamically establishing RSVP policy based on SIP telephony requests. While the present invention focuses on the use of RSVP for end-to-end signaling of QoS reservations, the concepts can also be extended for use with any end-to-end reservation protocol. In addition, the same concept also applies to dynamically establishing Dif Serv policy based on SIP telephony requests wherein the policy is provisioned on a real time basis to the router (PUSH) instead of the router querying for the policy on a real time basis (PULL.)
- PUSH real time basis
- FIG. 1 is a schematic view of a reference model of IP telephony communication
- FIG. 2 is a call flow diagram illustrating a call setup request, authorization and policy installation in accordance with the present invention
- FIG. 3 is a call flow diagram illustrating a QoS setup and completion of the IP telephone call in accordance with the present invention:
- FIG. 4 is a call flow diagram illustrating an RSVP teardown signaling and release of
- FIG. 5 is a call flow diagram illustrating a QoS usage reporting to a clea ⁇ nghouse in accordance with the present invention
- FIG. 6 is a call flow diagram illustrating a call teardown with background usage update in accordance with the present invention.
- FIG. 7 is a call flow diagram illustrating a call teardown with real-time usage update in accordance with the present invention.
- FIG. 1 shows a schematic diagram of a reference model for IP communication of the telephony type.
- the reference model has been chosen to represent many instances found in IP telephony or other types of IP communications. It is not. however, an exhaustive model, but rather serves the purpose of defining the message exchange between networks and network elements.
- the reference model of FIG. 1 has two types of clients: 1 ) at least one analog or digital phone 1 10. I l l that connects to the IP network via a circuit switched network 100,
- IP telephony gateways 135.
- IP client such as an IP phone 1 15 or various types ot computers 130
- IP phones 1 15 and computers 130 are considered clients for SIP call setup and RSVP signaling for network resources.
- ISPs 120. 121 provide access to an IP backbone 190 while the local exchange earner (LEC) for circuit switched telephony and the p ⁇ vate branch exchange (PBX) provide access to the IPSs 100, 101.
- LEC local exchange earner
- PBX p ⁇ vate branch exchange
- the physical connections between the ISPs. PBXs. and the IP telephony gateways can be any suitable media. In general, most of the Internet traffic travels over fiber optic cable, coax cable and twisted pair wire.
- Policy servers 140. 141. and 142 use COPS for policy deployment in their respective elements. COPS is a query and response protocol that can be used to exchange policy information between a policy server and its clients.
- policy refers to a combination of rules defining c ⁇ te ⁇ a for network resource access and usage.
- COPS RSVP capable routers R and R+. 160 and 170. are similarly situated in their respective networks to route network traffic SIP proxy servers (SPS) 150. 151 act as policy enforcement points (PEP) to autho ⁇ ze calls requested by SIP clients 1 10. I l l , 1 15 and 130
- a Clea ⁇ ng House server (CH) 180 serves several functions pertinent to call setup with QoS
- cleanng house server 180 acts as a trust broker between a large number of network providers, an optional gateway location service for IP telephony, an autho ⁇ zation for QoS (similar to credit card authorization in commerce), a collector of usage reports, and as a means of settlement between service providers. All of the above network elements operate together to setup, maintain and close a telephone conversation on the Internet Each network element responds to a unique set of messages and commands. While the message exchanges for the protocols listed above are well documented and understood separately, when used together with all of the network elements, this is not the case.
- FIG. 2 there is shown a call flow diagram illustrating a call setup request, authorization and policy installation according to the present invention.
- the call setup request, authorization and policy installation occur as follows:
- SIP phone 1 15 initiates a session by sending an SIP INVITE message 1 to proxy server SIP 1 150 and requests QoS SIP 1 150 then sends a COPS REQ AAA (authentication, autho ⁇ zation. and accounting) message 2 to local / client policy server POL1 140 Upon receipt of message 2.
- local policy server POL1 140 sends an OSP autho ⁇ zation request authentication request AUTHREQ message 3 to clearing house server CH 180.
- Clea ⁇ ng house server CH 180 responds by sending an OSP Authonzation response AUTHRSP message 4 back to POL 1 140.
- AUTHRSP message 4 includes an authorization token for use with call setup
- POL 1 140 next sends a COPS DEC (decision) install message 5 to SIP 1 150 with the autho ⁇ zation token embedded in the message.
- SIP1 150 requests call setup with remote SIP2 by generating an SIP INVITE message 6 requesting QoS and sending message 6 to SIP2 152.
- SIP2 152 Upon receipt of INVITE message 6.
- SIP2 152 issues COPS REQ AAA message 7 to policy server 2 POL2 141.
- Message 7 also contains the authorization token.
- Messages 8, 9 and 10 are identical to messages 3, 4, and 5 but performed at the remote end.
- SIP2 152 then invites GWY 136 by sending an SIP INVITE message 1 1 that requests QoS. GWY 136 answers with an SIP 183 message 12 and echos that QoS is required.
- a SIP 183 message signifies session progress.
- SIP2 152 signals policy server POL2 using a COPS REQ LDP (local decision policy) request message 13.
- POL2 141 provisions policy for use by local policy control in edge router R2 161 and SIP2 152 by sending a COPS DEC install message 14 to R2 161 and receiving a COPS RPT (report) message 15 from R2 161 when the installation is successful
- POL2 141 sends a COPS DEC install message 16 to SIP2 152 to install the policy in SIP2 151.
- SIP2 152 When policy is provisioned in the remote end, SIP2 152 sends a SIP 183 message 17 to SIP 1 150 which signifies a positive call progression on the remote end. Messages 18 - 21 are identical to messages 13 - 16 and provision policy in edge router R 1 160 and SIP 1 150 Finally. SIP 1 150 informs SIP client phone 1 15 of the call progress by sending SIP 183 message 22
- FIG 3. there is shown a call flow diagram illustrating QoS setup, resource reservation and completion of the IP telephone call according to the present invention
- the QoS setup and completion of the IP telephone call occur as follows
- SIP client 1 15 requests network resources for QoS using RSVP At the edge router. QoS tor the flow is enforced per the local policy control The specific policy by the SIP outsourced request; b) Remote edge router R2 161 install QoS in remote Local Area Network (LAN) using SBM and informs Rl 160, the LAN comp ⁇ ses at least one SIP client device; c) R 1 160 installs QoS in LAN using SBM; d) LAN QoS reservation is confirmed end-to-end in one direction.
- LAN Local Area Network
- RSVP PATH message is an operation sent by the sender to the receiver requesting a resen ation It follows the same route that the data flow ot the rese ation will follow The request tor resources is sent directly to edge router Rl 160
- edge router Rl 161 rather than require edge router Rl 161 to request a policy decision from policy server POL1 In this manner.
- QoS is installed directly in Rl 160 and decisions concerning policy are enforced per the local policy control Recall that the specific policy for the flow was pro ⁇ lsioned previously by the SIP outsourced request
- Edge router R 1 160 forwards message 23 to remote edge router R2 161 as message 24
- Edge router R2 161 installs QoS in the local area network LAN using the SBM by sending RSVP PATH message 25
- the PATH message request recourse reservation GWY 136 informs edge router R 1 160 of the installation by sending RSVP RES V message 26 to edge router Rl 160 RSVP RESV messages reserves resources along the paths between each
- an SIP 200 OK message 41 is sent from GWY 136 to SIP2 152. modified and sent to SIP 1 150 as message 42 and delivered to SIP client 1 15 as message 43
- the acknowledgment is orchestrated by sending a SIP ACK message 44 from client 1 15 to SIP 1 150
- the message is modified and sent to SIP2 152 as message 45
- SIP ACK message 46 is sent from SIP2 152 to GWY 136
- FIG 4. there is shown a call flow diagram illustrating RSVP teardown signaling and the release of QoS resources
- the message exchange is described in detail in FIG. 4.
- the teardown is initiated when SIP client phone 1 15 sends an RSVP PATHTEAR message 401 to router Rl 160.
- PATHTEAR messages request teardown of reserved resources.
- PATHTEAR message 401 is then propagated to remote router R2 161 as message 402 and terminates at gateway GWY 136 as message 403.
- the PATHTEAR message is sent by a sender toward a receiver and indicates that data flow is terminated.
- Router Rl 160 then issues an accounting report message 404 to policy server POL1 140.
- a PATHTEAR message 405 is generated and sent to SIP phone client 1 15, and a RESVTEAR message 406 is sent to router R2 161 and GWY 136.
- RESVTEAR messages actually remove reserved resources.
- Router R2 then issues an accounting report message 407 to policy server POL2 141.
- R2 issues a PATHTEAR message 408 to router Rl 160 and SIP phone client 1 15. and issues a RESVTEAR message 409 to GWY 136.
- RSVP is uninstalled and QoS resources are released. The call can continue, but it is no longer guaranteed resource reservation for QoS purposes.
- FIG. 5 there is shown a call flow diagram illustrating a generic QoS usage reporting to a clearinghouse.
- clearing house server CH 180 has several functions including, among others, acting as a collector of usage reports, and acting as a means of settlement between sen'ice providers.
- Usage by SIP client phone 1 15 is first reported by policy server POL1 140 to clea ⁇ ng house server CH 180 in message 501 and then confirmed in message 502
- Remote usage is similarly reported by policy server POL2 141 to clearing house server CH 180 in message 503 and confirmed in message 506
- FIG 6. there is shown a call flow diagram illustrating a call teardown with background usage update
- the users Upon completion of the phone call, the users exchange parting words and hang up the phone This event triggers the release of network resources and may initiate the generation of usage reports for subsequent billing
- the usage reports can be generated either independent of the call and QoS teardown (FIG 6) or contemporaneously with the call and QoS teardown (FIG 7)
- the latter option can support the instantaneous settlement ot charges but adds OSP usage reporting messages to the teardown message exchange
- the call teardown is initiated when SIP client phone 1 15 sends a SIP BYE message 601 to SIPl 150
- the message is propagated to GWY 136 in the forms of messages 602 and
- SIPs 150 sends a 200 OK message 604 to SIP Client 1 15 confirming the BYE message
- SIP 1 150 then issues a COPS REQ noLDP (remove local decision policy) message 605 and removes the local decision policy from the LAN and router Rl 160 with a COPS DEC
- a usage report RPT message 607 is generated and sent to policy sen er POL 1 POL 1 140 sends a COPS DEC message 608 to SIP 1 150 and removes the policy from SIPl 150 RSVP path teardown is signaled to remote gateway 136 from router Rl 160 using RSVP PATHTEAR message 609 Resources are released and path teardown is signaled using RSVP RESVTEAR message 610 and RSVP PATHTEAR message 61 1.
- Message 612 removes network resources and is similar to message 610
- Messages 613 and 614 are a SIP 200 OK message indicating success and are sent from GWY 136 to SIP2 152 and forwarded to SIPl 150.
- Messages 615 - 622 accomplish the same tasks as messages 605 - 612 but occur at the remote router R2 161.
- SIP 200 OK message 23 indicates success.
- the report messages 607 and 617 are later used for billing to settle accounts.
- Usage reporting may also happen in real time. Referring to FIG. 7, there is shown usage accounting in real time. The process is identical to FIG. 6 with the addition of steps 701 and 702 on the client side and steps 703 and 704 on the remote side.
- Message 701 is an OSP ⁇ Usage Ind ⁇ cat ⁇ on> message and indicates message ID, duration and destination in addition to other parameters.
- Message 702 is an OSP ⁇ Usage Confirmat ⁇ on> message and confirms the information previously supplied.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR0015350-8A BR0015350A (en) | 1999-11-05 | 2000-11-06 | Method of providing ip telephony with qos using end-to-end rsvp signaling |
AU13613/01A AU776055B2 (en) | 1999-11-05 | 2000-11-06 | Method for providing IP telephony with QoS using end-to-end RSVP signaling |
CA002390168A CA2390168A1 (en) | 1999-11-05 | 2000-11-06 | Method for providing ip telephony with qos using end-to-end rsvp signaling |
JP2001537227A JP2003514446A (en) | 1999-11-05 | 2000-11-06 | Method for providing IP telephone with QoS using RSVP communication between terminals |
EP00975584A EP1230806A4 (en) | 1999-11-05 | 2000-11-06 | METHOD FOR PROVIDING IP TELEPHONY WITH QoS USING END-TO-END RSVP SIGNALING |
MXPA02004490A MXPA02004490A (en) | 1999-11-05 | 2000-11-06 | METHOD FOR PROVIDING IP TELEPHONY WITH QoS USING END-TO-END RSVP SIGNALING. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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US16391399P | 1999-11-05 | 1999-11-05 | |
US60/163,913 | 1999-11-05 | ||
US43679499A | 1999-11-08 | 1999-11-08 | |
US09/436,794 | 1999-11-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001035604A2 true WO2001035604A2 (en) | 2001-05-17 |
WO2001035604A3 WO2001035604A3 (en) | 2002-01-24 |
Family
ID=26860070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/030446 WO2001035604A2 (en) | 1999-11-05 | 2000-11-06 | METHOD FOR PROVIDING IP TELEPHONY WITH QoS USING END-TO-END RSVP SIGNALING |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1230806A4 (en) |
JP (1) | JP2003514446A (en) |
CN (1) | CN1421103A (en) |
AU (1) | AU776055B2 (en) |
BR (1) | BR0015350A (en) |
CA (1) | CA2390168A1 (en) |
MX (1) | MXPA02004490A (en) |
WO (1) | WO2001035604A2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1655923A2 (en) * | 2004-11-01 | 2006-05-10 | AT&T Corp. | System and method for providing quality-of-service in a local loop |
GB2435587B (en) * | 2004-12-13 | 2008-10-01 | Transnexus Inc | Method and system for securely authorizing VOIP interconnections between anonymous peers of VOIP networks |
US8370497B2 (en) | 2001-11-16 | 2013-02-05 | Nec Corporation | Method for time-synchronous data transfer |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1981278B (en) * | 2004-03-12 | 2010-11-03 | 诺基亚公司 | Method and apparatus for providing quality of service support in a wireless communications system. |
NO322831B1 (en) * | 2005-07-15 | 2006-12-11 | Tandberg Telecom As | Procedure for immediate conference call scheduling. |
CN101399826B (en) * | 2007-09-26 | 2012-09-26 | 朗讯科技公司 | Signaling management system and method for session initiation protocol |
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US6058113A (en) * | 1997-09-30 | 2000-05-02 | Lucent Technologies, Inc. | Method for enhancing resource reservation communication |
US6141686A (en) * | 1998-03-13 | 2000-10-31 | Deterministic Networks, Inc. | Client-side application-classifier gathering network-traffic statistics and application and user names using extensible-service provider plugin for policy-based network control |
US6157648A (en) * | 1997-03-06 | 2000-12-05 | Bell Atlantic Network Services, Inc. | Network session management |
-
2000
- 2000-11-06 BR BR0015350-8A patent/BR0015350A/en not_active Application Discontinuation
- 2000-11-06 EP EP00975584A patent/EP1230806A4/en not_active Withdrawn
- 2000-11-06 CA CA002390168A patent/CA2390168A1/en not_active Abandoned
- 2000-11-06 CN CN00818083A patent/CN1421103A/en active Pending
- 2000-11-06 JP JP2001537227A patent/JP2003514446A/en not_active Withdrawn
- 2000-11-06 AU AU13613/01A patent/AU776055B2/en not_active Ceased
- 2000-11-06 WO PCT/US2000/030446 patent/WO2001035604A2/en active IP Right Grant
- 2000-11-06 MX MXPA02004490A patent/MXPA02004490A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US6157648A (en) * | 1997-03-06 | 2000-12-05 | Bell Atlantic Network Services, Inc. | Network session management |
US6058113A (en) * | 1997-09-30 | 2000-05-02 | Lucent Technologies, Inc. | Method for enhancing resource reservation communication |
US6141686A (en) * | 1998-03-13 | 2000-10-31 | Deterministic Networks, Inc. | Client-side application-classifier gathering network-traffic statistics and application and user names using extensible-service provider plugin for policy-based network control |
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Cited By (4)
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US8370497B2 (en) | 2001-11-16 | 2013-02-05 | Nec Corporation | Method for time-synchronous data transfer |
EP1655923A2 (en) * | 2004-11-01 | 2006-05-10 | AT&T Corp. | System and method for providing quality-of-service in a local loop |
EP1655923A3 (en) * | 2004-11-01 | 2006-05-17 | AT&T Corp. | System and method for providing quality-of-service in a local loop |
GB2435587B (en) * | 2004-12-13 | 2008-10-01 | Transnexus Inc | Method and system for securely authorizing VOIP interconnections between anonymous peers of VOIP networks |
Also Published As
Publication number | Publication date |
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MXPA02004490A (en) | 2003-06-24 |
CN1421103A (en) | 2003-05-28 |
EP1230806A2 (en) | 2002-08-14 |
JP2003514446A (en) | 2003-04-15 |
WO2001035604A3 (en) | 2002-01-24 |
CA2390168A1 (en) | 2001-05-17 |
AU1361301A (en) | 2001-06-06 |
BR0015350A (en) | 2002-11-26 |
EP1230806A4 (en) | 2004-03-17 |
AU776055B2 (en) | 2004-08-26 |
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