CN1421103A - Method for providing IP telephony with qualicy of service using end-to-end PSVP signaling - Google Patents

Method for providing IP telephony with qualicy of service using end-to-end PSVP signaling Download PDF

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Publication number
CN1421103A
CN1421103A CN00818083A CN00818083A CN1421103A CN 1421103 A CN1421103 A CN 1421103A CN 00818083 A CN00818083 A CN 00818083A CN 00818083 A CN00818083 A CN 00818083A CN 1421103 A CN1421103 A CN 1421103A
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qos
sip
server
strategy
message
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S·R·多诺万
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Verizon Business Global LLC
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MCI Worldcom Inc
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    • 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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Computer Hardware Design (AREA)
  • Computer Security & Cryptography (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)
  • Communication Control (AREA)

Abstract

The present invention discloses a method whereby the separate protocols: session initiation protocol SIP, resource reservation protocol RSVP, common open policy service COPS, and open settlement protocol OSP are used together to setup, maintain, and teardown Internet communications having an acceptable QoS. This process is accomplished by dynamically establishing RSVP policy based on SIP telephony requests to provide IP communications with QoS accross the Internet.

Description

Utilize end-to-end resource to preserve protocol signaling provides service quality to internet-protocol telephony method
The present invention relates generally to the IP communications field, more particularly, relate to and utilize end-to-end resource to preserve agreement (RSVP) signaling provides service quality (QoS) to Internet Protocol (IP) phone method.
The Internet society just develops by the direction that the internet carries out towards the interpersonal messaging that angel's form of ownership is arranged.Video broadcasting, wireless radio transmission, computer data and telephone system will be incorporated into a kind of medium and be sent to all over the world and imperceptible any mass loss.
Yet, have a feasibility commercial, such as the IP communication of IP phone and other IP communication service needs are equal to or higher than the service quality (QoS) that current digital circuit-switched network provides.This is in all IP network and need end-to-end QoS in the entire I P trunk of transport service between network endways.Although QoS can use, it also needs to use Internet resources, and therefore, if support to authorize and payment in the territory that communication takes place, then the service provider will need only guaranteed qos.
Various protocols and the various aspects of serving process IP to communicate by letter have been developed.For example, developed session initiation protocol (SIP) for call setup; For authorizing and operation report has been developed open settlement protocol (OSP); Develop universal external for the policy deployment in the network components and contracted policy service (COPS); For having developed resource, network settings QoS endways preserves agreement (RSVP); For being set, RSVP startup QoS developed subnetwork bandwidth manager in 802.x form LAN; For being set, the QoS service class developed Differentiated Services (DiffServ) in the IP trunk.
In order to finish call on the internet, three things will take place at least.The first, must point out called; The second, must set up the connection between the caller; At last, must aim at conversation and reserve the resource that is connected to caller.For this reason, SIP is responsible for setting up session, and RSVP is responsible for subscribing the required resource of calling.
Communication provides QoS to IP to stride the internet, and this requires the common mode of the use of call setup, mandate and QoS.Though developed above-mentioned each agreement in detail, as how consistent mode stride the internet and use together on each agreement, current also do not have a reported method.In addition, call out for the voice and video based on SIP on the internet, also the method for not reporting of dynamically setting up qos policy.
Therefore, an object of the present invention is to provide a kind of method, be used to utilize end-to-end RSVP signaling to provide QoS to IP phone, this method can provide acceptable QoS in the IP communication period of striding the internet.
Another object of the present invention provides a kind of method, is used on the internet to call out based on the voice and video of SIP dynamically to set up qos policy.
Another object of the present invention provides a kind of method, is used to utilize end-to-end RSVP signaling to provide QoS to IP phone, and this method is effectively used Internet resources and is easy to and realizes.
For realizing these purposes, a kind of method is provided, be used to utilize end-to-end RSVP signaling to provide QoS, before this method is included in IP communication, transmit unique message sequence in the IP communication period and in IP communication back to IP phone.Because the parameter that transmits in the message of front can be used in message subsequently, therefore described sequence is not arbitrarily.Though top listed agreement has a lot of file specifications and is understood when using separately.But situation is different when they use together.
The invention discloses a kind of method, use different agreements to set up, keep and dismantle thus simultaneously and have the Internet traffic that to accept QoS.This can be by dynamically setting up the RSVP strategy and finish according to the SIP phone request.Though the present invention concentrates on the use of the RSVP of the end-to-end signaling that QoS subscribes, this notion also can be expanded and be used for any end-to-end reservation protocol.In addition, identical notion also is applicable to based on the SIP phone request dynamically sets up the DiffServ strategy, wherein said strategy is to offer router (PUSH) on the basis in real time, rather than is offering the router (PULL) of inquiring about described strategy on the basis in real time.
By the detailed description of considering below in conjunction with accompanying drawing, these and other objects of the present invention and characteristic will become obviously, in the accompanying drawing:
Fig. 1 is the schematic diagram of the reference model of IP phone communication;
Fig. 2 is the call flow diagram that explanation is provided with according to setup requests of the present invention, mandate and strategy;
Fig. 3 is that explanation is according to the QoS foundation of IP phone calling of the present invention and the call flow diagram of finishing;
Fig. 4 is the call flow diagram that explanation discharges according to RSVP dismounting signaling of the present invention and QoS resource;
Fig. 5 is that explanation is according to the call flow diagram that uses to the QoS of switching center (clearinghouse) report of the present invention;
Fig. 6 is that explanation is according to the call flow diagram with calling dismounting of background use renewal of the present invention; And
Fig. 7 is that explanation is according to the call flow diagram with calling dismounting of real-time use renewal of the present invention.
Referring now to accompanying drawing, wherein similarly reference character in several views representation class like or identical parts.Fig. 1 illustrates the schematic diagram of reference model of the IP communication of phone type.Select this reference model to represent many situations in IP phone or other type i P communication.But it is not exhaustive model, just is used for the message between define grid and the network components.
The reference model of Fig. 1 has two types client: at least one the analog or digital phone 110,111 that 1) is connected to IP network by circuit-switched network 100,101 (PBX) and IP phone gateway (GWY) 135,136; And 2) such as at least one IP client of IP phone 115 or all kinds computer 130.Herein, IP phone gateway 135,136, IP phone 115 and computer 130 all are considered as the client of SIP call setup and Internet resources RSVP signaling.
The access that ISP (ISP) 120,121 provides IP trunk 190, and LEC local exchange carrier of circuit exchanging telephone (LEC) and private branch exchange (PBX) provide the access to IPS 100,101.Physical connection between ISP, PBX and the IP phone gateway can be any suitable medium.Usually, most internet services transmit by optical cable, coaxial cable and twisted-pair feeder.Strategic server 140,141 and 142 is used for the policy deployment of its respective element with COPS.COPS is inquiry and response protocol, is used in exchanging policy information between strategic server and its client.The principle combinations of adopted network resource accession and usage criteria specified in term " strategy ".In addition, router R and the R+ 160,170 with COPS RSVP ability is arranged in its corresponding network equally so that Route Selection is carried out in Network.Sip proxy server (SPS) 150,151 is authorized the calling of SIP client 110,111,115 and 130 requests as policy enforcement point (PEP).
Switching center's server (CH) 180 provides QoS to several functions relevant with call setup.Specifically, switching center's server 180 is as a kind of clearing form between mandate (being similar to the credit card authorization in the commerce), operation report gatherer and the service provider of the trust broker between a large amount of network providers, the optional gateway location service of IP phone, QoS.All above-mentioned network componentses are operated together, to set up, to safeguard and the telephone relation of end on the internet.Each network components responds unique one group of message and order.
Though the message of above listed agreement has a lot of file specifications respectively and understood, when using with the all-network parts, situation is just different.
With reference to Fig. 2, the explanation of the call flow diagram of Fig. 2 is provided with according to setup requests of the present invention, mandate and strategy.Usually, setup requests, mandate and strategy are provided with in the following manner and take place:
A) SIP client's (phone) 115 sets up to 150 requests of SIP1 acting server and calls out;
B) SIP1 150 checks local policy server POL1 140;
C) local policy server POL1 140 checks with the server CH of switching center 180;
D) SIP1 150 sets up to long-range SIP2 152 requests and calls out;
E) SIP2 151 checks local policy server POL2 141;
F) local policy server POL2 141 checks with the server CH180 of switching center;
G) remote policy server POL2 provides strategy to use for local policy control in edge router R2 161 and SIP2 152;
H) if normal, local SIP1 150 obtains sure call progress form from long-range SIP2 152;
I) POL1 140 provides local policy in edge router R1 160 and acting server SIP1 150; And
J) SIP1 150 notifies phone 115 with call progress.
The real messages sequence belongs to several agreements: SIP, OSP, COPS, RSVP and SBM.Described sequence is described in detail in Fig. 2.
SIP phone 115 starts session and asks QoS by SIP INVITE 1 being sent to acting server SIP1150.Subsequently, SIP1 150 sends to this locality/customer strategy server POL1 140 with COPS REQ AAA (authentication, mandate and record keeping) message 2.After receiving message 2, local policy server POL1 140 sends to the server CH of switching center 180 with OSP authorization requests authentication request AUTHREQ message 3.The server CH of switching center 180 responds by OSP authorization response AUTHRSP message 4 is sent back to POL1 140.AUTHRSP message 4 comprises the authorization token that uses for call setup.
Then COPS DEC (judgement) is set up message 5 sends to SIP1 150 to POL1 140, and embeds authorization token in this message.SIP1 150 sends to SIP2 152 by the SIPINVITE message 6 of generation request QoS and with message 6, and request is set up calling with long-range SIP2.After receiving INVITE 6, SIP2 152 is dealt into strategic server 2 POL2 141 to COPS REQ AAA message 7.Message 7 also comprises authorization token.Message 8,9 is identical with message 3,4 and 5 with 10, but carries out at far-end.
Subsequently, SIP2 152 invites GWY 136 by sending the SIP INVITE 11 of request QoS.GWY 136 usefulness SIP 183 message 12 are replied and are replied and need QoS.SIP183 message is represented session progress.SIP2 152 utilizes COPS REQ LDP (local mode decision scheme) request message 13, sends signal to strategic server POL2.Message 14 sends to R2 161 and receive COPS RPT (report) message 15 from R2 161 when setting up successfully by COPS DEC is set up, and POL2 141 provides strategy to use for local policy control in edge router R2 161 and SIP2 152.POL2 141 sets up message 16 to COPS DEC and sends to SIP2 152, to set up strategy in SIP2 151.When far-end provided strategy, SIP2152 sent to SIP1 150 to SIP 183 message 7, the sure call progress of expression far-end.Message 18-21 is identical with message 13-16, and strategy is provided in edge router R1 and SIP1 150.At last, SIP1 150 is by sending SIP 183 message 22, call progress notice SIP customer phone 115.
At this moment, SIP, OSP and COPS agreement are used to set up call request, and calling is authorized and for the call setup strategy.Yet have such possibility: though utilize SIP successfully to set up calling, because the resource limit of just finding behind the call setup, calling will be subjected to being lower than acceptable quality.As described below, the present invention has solved this problem by dynamically setting up qos policy for calling out based on the voice and video of SIP.
Referring now to Fig. 3, the call flow diagram of Fig. 3 illustrates QoS foundation, the resource reservation of calling out according to IP phone of the present invention and finishes.Usually, the QoS of IP phone calling sets up and finishes in the following manner and takes place:
A) SIP client 115 utilizes the Internet resources of RSVP request QoS.On edge router, the QoS of flow process is implemented by local policy control.SIP contracts the outside request specific policy is provided;
B) remote edge router R2 161 utilizes SBM to set up QoS in remote lan (LAN), and notice R1 160, and this LAN comprises at least one SIP customer set up;
C) R1 160 utilizes SBM to set up QoS in LAN;
D) end-to-end in one direction affirmation LAN QoS subscribes;
E) identical message in the repeating step (a)-(d) on opposite direction;
F) call progress is confirmed to be " ring " and is replied;
G) set up two-way RTP (real time transport protocol) stream; And
H) each side can greet and carry out telephone relation.
Now sequence is described in detail.Continuation is with reference to figure 3.Message 23-31 sets up from caller to called call flow, and message 32-40 sets up from being called into the call flow of caller.At last, message 41-46 confirms call progress and replys described affirmation.
SIP customer phone 115 starts the request to Internet resources by RSVP PATH message is sent to edge router R1160.RSVP PATH message is the operation that transmitter sends to the request reservation of receiver.The route that it is followed is identical with the route of following with the data flow of reservation.Resource request directly is sent to edge router R1 160, rather than requires edge router R1 151 to adjudicate to strategic server POL1 request strategy.Like this, directly in R1 160, set up QoS, and the judgement corresponding strategies is implemented by local policy control.Remember that the specific policy of flow process is before contracted request by the SIP outside and provided.
Edge router R1 160 is forwarded to remote edge router R2 161 with message 23 as message 24.Edge router R2 161 utilizes SBM to set up QoS in local area network (LAN) LAN by sending RSVP PATH message 25.PATH message request resource reservation.GWY 136 is by sending to edge router R1 160 to RSVP RESV message 26, with described foundation notice edge router R1 160.RSVP RESV subscribe messages is along the resource in the path between each device.This message is forwarded to edge router R1 160 with the form of message 27.Subsequently, edge router R1 160 utilizes SBM to begin to set up QoS in LAN by sending RSVP RESV message 28.Subsequently, utilize RSVP RESV- CONF message 29,30 and 31, end-to-end in one direction affirmation LAN QoS subscribes.Utilize the message format identical to set up the resource reservation of QoS in the other direction with forward.Specifically, message 32-34 is corresponding with message 23, and message 35-37 is corresponding with message 26, and message 38-40 is corresponding with message 29.
At last, call progress is confirmed to be " ring ", and this affirmation is replied.For finishing this operation, SIP 200 OK message 41 are sent to SIP2 152 from GWY 136, and are modified, and are sent to SIP1 150 as message 42, and are sent to SIP client 115 as message 43.By being sent to SIP1 150 from client 115, SIP ACK message 44 organizes described replying.Described message is modified and is sent to SIP2 152 as message 45.At last, SIP ACK message 46 is sent to GWY 136 from SIP2 152.
After receiving ACK message 46, two-way rtp streaming is established, and each side can begin to carry out telephone relation, and QoS is by the resource reservation support.
With reference to Fig. 4, the release of the call flow diagram of Fig. 4 explanation RSVP dismounting signaling and QoS resource.After call setup and RSVP had set up, arbitrary user can send signaling to RSVP, to discharge the QoS resource and to dismantle QoS.Though media business (call) can continue by network, no longer guarantee resource reservation for the QoS purpose.Usually, message takes place in the following manner:
A) client sends PATHTEAR message.PATHTEAR propagates into remote gateway 136;
B) in local lan, unload QoS by edge router R1160;
C) this locality of strategy deletion report of keeping accounts offers strategic server POL1 by edge router R1 160, and this is reported in when needing real-time operation report and also is used.
D) dismounting of RSVP path is arrived remote gateway 136 by signalisation;
E) long-range record keeping report offers strategic server POL2 by edge router R2 162;
F) in remote lan, discharge the QoS resource; And
G) edge router R2 offers strategic server POL2 with long-range record keeping report.
In Fig. 4, describe message in detail.When SIP customer phone 115 sends to router R1 160 to RSVPPATHTEAR message 401, start dismounting.The resource that the dismounting of PATHTEAR message request is subscribed.PATHTEAR message 401 propagates into remote router R2 162 as message 402 subsequently, and stops at gateway GWY 136 as message 403.PATHTEAR message is sent by sender to receiver, and the expression data flow is terminated.Router R1 160 is dealt into strategic server POL1 140 with record keeping report message 404 subsequently.Simultaneously, PATHTEAR message 405 is generated and is sent to SIP phone client 115, and RESVTEAR message 406 is sent to router R2 161 and GWY 136.In fact RESVTEAR message delete the resource of reservation.Subsequently, router R2 is dealt into strategic server POL2 141 with record keeping report message 407.At last, R2 is dealt into router R1 160 and SIP phone client 115 with PATHTEAR message 408, and RESVTEAR message 409 is dealt into GWY 136.When message finished, the unloaded and QoS resource of RSVP was released.Calling can be proceeded, but no longer guarantees resource reservation for the QoS purpose.
With reference to Fig. 5, the call flow diagram of Fig. 5 illustrates to the common Q oS of switching center operation report.Remember that as mentioned above, the server CH of switching center 180 has several functions, comprising as the operation report gatherer with as the checkout apparatus between the service provider.
The use of SIP customer phone 115 reports to the server CH of switching center 180 by strategic server POL1 140 with the form of message 501 earlier, and the form with message 502 is identified subsequently.Long-range use reports to the CH of switching center 180 by strategic server POL2 141 with the form of message 503 in a similar fashion, and is identified with the form of message 506.
More than shown in the common dismounting of resource of QoS and operation report general relevant with the Internet phone call termination.More complicated message has been shown among Fig. 6 and Fig. 7.
With reference to Fig. 6, the explanation of the call flow diagram of Fig. 6 has background and uses the calling dismounting of upgrading.After finishing call, the user say mutually not Hua and on-hook.These Event triggered Internet resources discharge, and can start the generation of the operation report that is used for making out the bill subsequently.Operation report can be independent of calling and QoS dismounting and generate (Fig. 6), or generates (Fig. 7) simultaneously with calling and QoS dismounting.The latter can support the immediately-charging clearing, but OSP operation report message is added to the dismounting message.
When SIP customer phone 115 sends to SIP1 150 with SIP BYE message 601, start and call out dismounting.This message propagates into GWY 136 with the form of message 602 and 603.SIP150 sends to SIP client 115 with 200 OK message 604, confirms BYE message 601.Subsequently, SIP1 150 sends COPS REQ noLDP (deleting local mode decision scheme) message 605, and deletes local mode decision scheme by COPS DEC Rem (COPS deletes judgement) message 606 from LAN and router R1 160.Operation report RPT message 607 is generated and is sent to strategic server POL1.POL1 140 sends to SIP1150 with COPS DEC message 608, and from SIP1 150 deletion strategies.Utilize RSVP PATHTEAR message 609, the dismounting of RSVP path is signaled to remote gateway 136 from router R1 160.Utilize RSVP RESVTEAR message 610 and RSVP PATHTEAR message 611, discharge resource and signal the path dismounting.Message 612 deletion Internet resources, and similar with message 610. Message 613 and 614 is the successful SIP 200 OK message of expression, and sends to SIP2 152 from GWY 136, and is forwarded to SIP1 150.Message 615-622 finishes the task identical with message 605-612, but takes place on remote router R2 161.At last, SIP 200OK message 23 is represented successfully.Be used to make out the bill after the report message 607 and 617 and check out.
Operation report also can take place in real time.With reference to Fig. 7, Fig. 7 illustrates real-time usage billing.Except that the step 701 of client and 702 and the step 703 and 704 of far-end, identical among this process and Fig. 6.Message 701 is OSP＜use indications〉message, except that other parameter, also point out message id, duration and destination.Message 702 is that OSP＜use is confirmed〉message, and the information that provides before confirming.
Though illustrate and described several embodiments of the present invention, be appreciated that under the situation of the spirit and scope of the present invention that in not breaking away from the appended claim book, define, can carry out many changes and modification.

Claims (9)

1. the method for service quality (QoS) is provided in Internet Protocol (IP) telephone conversation between calling and called, and it may further comprise the steps:
For described caller and the described session that has between first device of IP ability transmit the IP medium;
For described described session called and that have between second device of IP ability transmits the IP medium; And
Described first device with set up IP between described second installs and be connected; And
For described telephone conversation is subscribed Internet resources.
2. the method for claim 1, it is characterized in that described first and described second device be router.
3. the method for claim 1 is characterized in that the step of described reservation Internet resources uses resource to preserve agreement (RSVP).
4. the method for claim 1 is characterized in that the step of described reservation Internet resources is further comprising the steps of:
Has first session initiation protocol (SIP) setup requests of QoS by SIP client's generation;
Described first setup requests is sent to first sip proxy server;
Generate the 2nd SIP setup requests by described first sip proxy server with QoS to second sip proxy server;
Generate Three S's IP setup requests by described second sip proxy server with QoS to the remote client;
In described second device and described second sip proxy server, provide strategy;
When in described second device and described second sip proxy server, successfully providing strategy, in described first device and described first sip proxy server, provide strategy; And
Notify described SIP client with described call progress.
5. the method for claim 1 is characterized in that further comprising the steps of:
Has the SIP setup requests of QoS by SIP client's generation;
Described first setup requests is sent to first sip proxy server;
Generate the 2nd SIP setup requests by described first sip proxy server with QoS to second sip proxy server;
Generate Three S's IP setup requests by described second sip proxy server with QoS to the remote client;
In described second device and described second sip proxy server, provide strategy by the remote policy server;
When in described second device and described second sip proxy server, successfully providing strategy, in described first device and described first sip proxy server, provide strategy by the customer strategy server; And
Notify described SIP client with described call progress.
6. method as claimed in claim 4 is characterized in that further comprising the steps of:
Utilize remote subnetwork Bandwidth Broker (SBM) and described second device in remote lan (LAN), to set up QoS;
Notify described first device described QoS foundation in the described remote lan;
Utilize client SBM and described first device in client LAN, to set up QoS;
Affirmation is also replied described call progress; And
Set up real time transport protocol (RTP) stream.
7. method as claimed in claim 6 is characterized in that may further comprise the steps:
RSVP PATHTEAR message propagation is deleted QoS with request to remote gateway in described client LAN;
Utilize described first device in client LAN, to unload QoS;
RSVP PATHTEAR message propagation is deleted QoS with request to described remote gateway in described remote lan; And
Utilize described second device in remote lan, to unload QoS.
8. method as claimed in claim 7 is characterized in that further comprising the steps of:
Generate first operation report of giving first strategic server by described first device; And
Generate second operation report of giving second strategic server by described second device, wherein said operation report is used to the purpose of keeping accounts.
9. method as claimed in claim 4 is characterized in that further comprising the steps of:
Check first strategic server to determine correct strategy, wherein said inspection is carried out by described first sip server;
Check that switching center's server is to determine correct strategy and to ask the mandate of described strategy that wherein said inspection and request are carried out by described first strategic server;
Notify described first strategic server with described correct strategy, and provide mandate for described strategy;
Check second strategic server to determine correct strategy, wherein said inspection is carried out by described second sip server;
Check described switching center server with definite correct strategy, and ask the mandate of described strategy, wherein said inspection and request are carried out by described second strategic server; And
Notify described second strategic server with described correct strategy, and provide mandate for described strategy.
CN00818083A 1999-11-05 2000-11-06 Method for providing IP telephony with qualicy of service using end-to-end PSVP signaling Pending CN1421103A (en)

Applications Claiming Priority (4)

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US16391399P 1999-11-05 1999-11-05
US60/163913 1999-11-05
US43679499A 1999-11-08 1999-11-08
US09/436,794 1999-11-08

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CA (1) CA2390168A1 (en)
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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.
CN101223730B (en) * 2005-07-15 2011-05-04 坦德伯格电信公司 Method for instant scheduling of conference calls
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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AU776055B2 (en) 2004-08-26
WO2001035604A3 (en) 2002-01-24
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CA2390168A1 (en) 2001-05-17
AU1361301A (en) 2001-06-06

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