CN101803332B - For setting up the method for calling in a communication network - Google Patents

For setting up the method for calling in a communication network Download PDF

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Publication number
CN101803332B
CN101803332B CN200880106991.4A CN200880106991A CN101803332B CN 101803332 B CN101803332 B CN 101803332B CN 200880106991 A CN200880106991 A CN 200880106991A CN 101803332 B CN101803332 B CN 101803332B
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Prior art keywords
call control
control node
media gateway
calling
list
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CN101803332A (en
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D·坎普曼
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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    • 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
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
    • 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
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1023—Media gateways
    • H04L65/103—Media gateways in the network
    • 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
    • H04L65/10—Architectures or entities
    • H04L65/1046—Call controllers; Call servers
    • 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

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Disclose a kind of for the method by selecting the media gateway that will be used for calling out to set up calling in a communication network.Described media gateway is in user face, described method comprises the negotiations process at least utilizing following steps to provide, wherein: the first call control node in chain of command sends to the second call control node in described chain of command the message identifying and be considered to the list of at least two media gateway being suitable for calling to be set up.Also disclose call control node and computer program.

Description

For setting up the method for calling in a communication network
Technical field
The present invention relates to the method for setting up calling in a communication network.It also relates to the call control node being configured to participate in setting up calling in a communication network, and relating to the computer program comprising instruction, described instruction is configured to make the method for this call control node execution for setting up calling in a communication network when performing on call control node.
Background technology
In communication network (such as communication network), calling relates in one aspect to chain of command or signaling plane usually, and relates to user face on the other hand.Chain of command or signaling plane are responsible for developing and managing the connection between two points on network.User is responsible in face transmitting user data.
User face is set up calling and comprises the node that selection is called as media gateway (MG or MGW), route or swap data will be come by this media gateway.This media gateway is the node on user face.The selection to media gateway is performed by the node being called as call control node (CCN).Call control node on a control plane.Call control node serves as Media Gateway Controller (MGC), because which media gateway they control be used for calling.Media gateway is responsible for exchangeing subscriber face data, and if be responsible for if required providing equipment in band.
The exemplary communication network comprising call control node and media gateway is the 3GPPTS23.205V7.5.0 (2007-06) being called as " list of references [1] " or " document [1] " in this article, 3rdGenerationPartnershipProject, TechnicalSpecificationGroupCoreNetworkandTerminals, Bearer-independentcircuit-switchedcorenetwork, Stage2 (Release7) (can from 3GPP, SophiaAntipolis, France obtains) middle circuit switching (CS) core network irrelevant with carrying that be that describe.Both core network one side uses of list of references [1] are all called as (such as describing in list of references [1] part 5.1.1.1) media exchange center (MSC) server and (such as describing in list of references [1] part 5.1.1.2) gateway media switching center (GMSC) server of call control node, and use (such as describing in list of references [1] part 5.1.1.3) media gateway on the other hand.GMSC server and MSC server provide Call-Control1 and mobile management function, and media gateway provides Bearer Control and transfer resource function.Media gateway can comprise flow operation function, and can perform media conversion and frame-forming protocol conversion.
Other example call Controlling vertex comprises transit switching center (TSC) and MGCF (MGCF).In the example runner of media gateway, equipment (such as media operating device) comprises code conversion machine equipment, echo canceller or tone and notification device.
Multiple call control node may be related in foundation calling.Can use call control protocol between call control node, signal call setup information, described call control protocol such as ISUP (ISDN User Part or integrated service digital network User Part), BICC (with the Call-Control1 that carrying is irrelevant) or SIP (Session initiation Protocol).When call control node selects media gateway, call control protocol can be provided, with make call control node the identifier of selected media gateway sent to another call control node (such as see reference document [1] part 6.1.1.1, wherein MGW select can based on likely from the MGW-id that node subsequently receives).Then, other call control node has for user face exchanges the chance selecting identical media gateway.The selection of media gateway has impact to the utilization of resources in node and communication network.
Therefore, expect to provide the method and the call control node that solve or partly solve the problem of selection media gateway above-mentioned, to optimize the utilization of resources.
Summary of the invention
Limit such method and call control node in the independent claim.Define favourable embodiment in the dependent claims.
In one embodiment, the method is by selecting the media gateway that will be used for calling out to set up calling in a communication network.Media gateway is in user face.The method comprises the negotiations process at least utilizing following steps to provide, in described step, the first call control node is in the control plane considered to the message of the list of at least two media gateway being suitable for (eligiblefor) calling to be set up to the second call control node transmission mark in chain of command.
In this embodiment, the first call control node sends to the second call control node and can successfully select which media gateway to set up the information of calling in a communication network about the first call control node.Be not the media gateway making the second call control node select to be used for setting up for the second call control node calling among all media gateway, but the second call control node will from the list wherein carrying out the media gateway selected from the first call control node reception.The method is selected to add constraint to the media gateway of the second call control node side.In this case, it helps to select suitable media gateway, if possible words, described suitable media gateway can be used by both first and second call control nodes usually.
Like this effective use to Internet resources is achieved to the selection of the public medium gateway for calling to be set up, because the second call control node receives the prior information about the ability of the first call control node.
Communication network can be any network for data communication in this article, such as core network in the mobile communication network, or fixing telephone communication network.Media gateway forms the node being come route or exchange data packets or stream by it.In one embodiment, communication network be circuit switched core network, the circuit switched core network irrelevant with carrying, packet-switched core network, the circuit switched core network in the circuit switched core network, GSM and the/UMTS environment that transmits for ATM and/or IP and any one in the middle circuit switched core network described of list of references [1].
Chain of command is agreement and agreement and mechanism collection, and as expansion, be implement these mechanism for developing and managing connection, such as, for providing the network node of mobile management.
User face is that agreement and agreement collect with mechanism, and as expansion, is the network node for transmitting user data of these mechanism of enforcement.In one embodiment, bearing function is implemented in user face, such as, for providing Bearer Control and transfer resource function.
Calling is the connection between at least two sides (such as calling party and callee).This connection can be established with the data of transferring voice, data, speech frame or other type any.
Call control node can be configured to perform the server computer developing and managing relevant function with media gateway node in user face.Call control node can comprise processor, memory cell and be arranged to perform to make it can perform the software of its function on call control node.In one embodiment, each in the first and second call control nodes is any one in media exchange center server, gateway media switching center server and MGCF (MGCF).
Media gateway can be configured at least for performing the server computer of transmitting user data on user face.This media gateway can comprise processing unit, memory cell and be configured to perform to make it can perform the software of its function in media gateway.
In one embodiment, if call control node is known media gateway and can order media gateway be worked in calling to be set up, then this media gateway is considered to the calling that is suitable for be set up by call control node.
In one embodiment, the message of identification list comprises the identifier of this list, wherein store list itself on the position of energy called Controlling vertex access.In one embodiment, the message of identification list comprises the identifier of the media gateway in list.These two embodiments are not exclusive and can be in conjunction with.In other words, this message can comprise the clear and definite identifier of at least one media gateway and be stored in the identifier of the list outside message, to make the list of this message identifier of result at least two media gateway.
The media gateway the method achieved between call control node consults (i.e. the negotiation of public medium gateway), such as, apply wherein and forward carrying foundation.Forwarding carrying foundation is that the one wherein setting up carrying in the direction (namely from calling party to callee) identical with calling on user face is arranged.The selection of common media gateway node improves the utilization of resources in network.The method can be applied to existing agreement, such as standard BICC or Session Initiation Protocol, and any impact can not be had on it.
In one embodiment, the first call control node sends the message of the list of mark at least two media gateway to the second call control node in the forward direction.This direction is the direction established call connection.
By in the upper message sending this list of mark of direction (namely from calling party to callee), provide the efficiency utilization to Internet resources when setting up calling.Message that is that use in the existing protocol for connecting and that send in the forward direction can be used to transmission list or identify the identifier of this list.
In one embodiment, utilize following steps to provide negotiations process further, in described step, the second call control node is from the first call control node receipt message.Then this second call control node removes from the list by received message identifier the media gateway that this second call control node can not select for this calling.Then this second call control node selects the media gateway that will be used for calling to be set up from this list, and sends the message of the media gateway selected by mark to this first call control node.
In this embodiment, this second call control node considers the constraint being applicable to the first call control node.This is by considering that the first call control node thinks that the list of the media gateway being suitable for calling to be set up has come.This second call control node also considers himself constraint.This can not select to have come for the media gateway of this calling by removing this Section Point from the list by received message identifier.
Second call control node is after the constraint and the constraint of himself of consideration first call control node, if likely it just selects the media gateway that will be used for calling to be set up from list.Then it back send the message of the media gateway selected by mark to the first call control node.Then, this first call control node can select the identical media gateway for calling to be set up, the media gateway of namely having been decided through consultation by the first and second call control nodes.
This embodiment offers the effective enforcement for minimizing the number for the media gateway of calling out, to make to use Internet resources efficiently.
In this embodiment, this second call control node removes from the list by received message identifier the media gateway that this second call control node can not select for this calling, and selects the media gateway that will be used for calling to be set up from this list.But such removing step may cause sky list.If so, can not select from this list.But this process can continue according to mode below.This second call control node selects media gateway according to its local restriction, and sends the message of the media gateway selected by mark to the first call control node.First call control node identifies the list that selected media gateway does not belong to original transmitted, and selects media gateway from the list of this original transmitted.This situation can not cause the first and second nodes to use public medium gateway.
In one embodiment, utilize following steps to provide negotiations process, in described step, the first call control node receives the message of the media gateway selected by mark.When receiving described message, the selected media gateway identifier that described first call control node is used in received message completes or has attempted calling to be set up.This provide the efficiency utilization to Internet resources.Use the instruction of such as list of references [1], it will be understood to those of skill in the art that and how to use media gateway identifier to come or attempted calling.
In one embodiment, utilize following steps to provide negotiations process further, in described step, the 3rd call control node receives the message sent to the second call control node by the first call control node.Therefore 3rd call control node is called as MidCall Controlling vertex.As mentioned above, this message identifier first call control node thinks the list of at least two media gateway being suitable for calling to be set up.When receiving this message, described 3rd call control node removes from the list by received message identifier the media gateway that it can not select for this calling.Then, it forwards the message of this list of mark to the second call control node, namely identifies the message of list that may revise, from the list of this amendment, removed the media gateway that the 3rd call control node can not be selected for being called out.In other words, from the 3rd node to the list identified in the message that Section Point forwards be the first list thinking the media gateway being suitable for calling to be set up together with the 3rd node.
This embodiment makes it possible to the constraint considering MidCall Controlling vertex (i.e. the 3rd call control node) when selecting the media gateway for calling to be set up further.
The process of the 3rd call control node may produce the unmodified list (when the 3rd call control node thinks that all media gateway of list are all applicable to) being retained as former state (asreceived), produce with amendment form keep but the modified list of non-NULL (the 3rd call control node think some media gateway be applicable to and in the unaccommodated situation of other media gateway), or empty list (under all media gateway are all considered to unaccommodated situation).If the third situation (obtaining empty list), then may there is situation below.3rd call control node can create new list, and starts new media gateway negotiation to call control node (such as to the second call control node) subsequently.In this case, not the first list thinking the media gateway being suitable for calling to be set up together with the 3rd node from the 3rd node to the list identified in the message that Section Point forwards, and only thought the list of the media gateway be applicable to by the 3rd node.Alternatively (still in a third case), 3rd call control node can select media gateway according to its local restriction, and to this second call control node send this selected media gateway is designated by by the 3rd and second call control node use proposed by the message of public medium gateway.In another interchangeable mode (still in a third case), the 3rd call control node the second call control node can be asked to select media gateway according to its local restriction and send this selected media gateway is designated by by the 3rd and second call control node use proposed by the message of public medium gateway.
This embodiment is applied to the MidCall Controlling vertex with the ability controlling media gateway.The signaling plane node (such as calling out conciliation (mediation) node) not controlling media gateway should not participate in media gateway and consult, should not disturb and to consult and only should when not from forwarding messages when this list removing entry.
In one embodiment, utilize following steps to provide negotiations process further, in described step, the 3rd call control node receives the message of the media gateway selected by mark from the second call control node.Then, the 3rd call control node selects the media gateway identified in the received message as the media gateway that will be used for calling to be set up.Then 3rd call control node forwards the message of the media gateway selected by mark to the first call control node.
This embodiment makes it possible to order MidCall Controlling vertex and uses the media gateway selected by the second call control node.
The invention still further relates to the method by selecting the media gateway that will be used for calling out to participate in setting up in a communication network calling performed by each call control node in chain of command.That is, the present invention relates to the method performed in the following manner: the first call control node sends the message that mark is considered to the list of at least two media gateway being suitable for calling to be set up at first.The method also relates to a kind of method, and the second call control node receives mark is thought the list of at least two media gateway being suitable for calling to be set up message by the first call control node in the method; The media gateway that will be used for calling to be set up is selected from this list; And the message of the media gateway selected by mark is back sent to the first call control node.The invention still further relates to the method performed in the following manner: the message being forwarded the above-mentioned list of mark by the 3rd call control node (i.e. MidCall Controlling vertex) on the direction of the second call control node, or the message forwarding the media gateway selected by mark on the direction of the first call control node.
The invention still further relates to the call control node itself being configured to run in the operation of said method.The invention still further relates to the computer program comprising instruction, this instruction is configured to make this call control node perform above-mentioned any one method or its part when performing on call control node.
Accompanying drawing explanation
By reference to the accompanying drawings embodiments of the invention will be described now, wherein:
Fig. 1 and Fig. 2 schematically illustrates two example call and sets up scene to help to understand problems more solved by the invention;
Fig. 3 a and 3b respectively illustrates method according to an embodiment of the invention and network configuration, and wherein the first call control node is set up in the process of calling and sent message to the second call control node in communication network;
Fig. 4 a and 4b respectively illustrates method according to an embodiment of the invention and network configuration, wherein the first call control node sends message to the second call control node, and described second call control node receives this message, processes this message and back sends message to described first call control node;
Fig. 5 a and 5b respectively illustrates method according to an embodiment of the invention and network configuration, wherein the first call control node sends message to the second call control node, described second call control node receives this message, processes this message and back sends message to described first call control node, and then described first call control node receives this message and completes or attempted calling;
Fig. 6 a and 6b respectively illustrates method according to an embodiment of the invention and network configuration, and wherein the first call control node and MidCall Controlling vertex participate in setting up calling in a communication network;
Fig. 7 a and 7b respectively illustrates method according to an embodiment of the invention and network configuration, and wherein first, second, and third call control node participates in setting up calling in a communication network;
Fig. 8 a and 8b respectively illustrates method according to an embodiment of the invention and network configuration, and wherein first, middle and the second call control node participates in setting up calling in a communication network;
Fig. 9 illustrates three call control nodes that calling is set up in participation according to an embodiment of the invention in a communication network; And
Figure 10 a, 10b, 11,12a and 12b illustrate call control node according to an embodiment of the invention.
Embodiment
In conjunction with specific embodiment, the present invention will be described now.It should be noted that three specific embodiments are used for providing good understanding for those skilled in the art, but be not intended to limit the scope of the invention by any way, scope of the present invention is defined by the following claims.
Fig. 1 schematically shows example call and sets up scene to help to understand some potential problems of the present invention.
Illustrated scene be applicable to call (movement or fixing) or more generally telecommunications connect, and use forwarding loading establishing process.Herein, the carrying pointing to callee from calling party is set up.In this graphic left-hand side, illustrate (calling party and calling party side) radio access network of making a start (RAN such as represents the GERAN of GSMEDGE radio access network).At this graphic right-hand side, illustrate (callee and callee side) long haul radio access network (RAN, such as GERAN).
In the part that front call control node CNN-1 and follow-on-call Controlling vertex CNN-2 is chain of command, and each controls a media gateway node (being media gateway node MG-1 and media gateway node MG-2 respectively) respectively and exchanges for user face.Set up to realize forwarding carrying, first follow-on-call Controlling vertex CCN-2 selects media gateway (MG) and then back to sending media gateway identifier and carrying address information at front call control node CNN-1.Then select media gateway at front call control node CNN-1 and initiate loading establishing process.
More particularly, Fig. 1 illustrates and uses the forwarding carrying of Bearer Independent Call Control Protocol exemplarily property call control protocol to set up principle behind, to help to understand some potential problems of the present invention.Cause the step of call establishment as follows:
(1) initial addressed messages (IAM) is sent to follow-on-call Controlling vertex CNN-2 to provide call setup information from front call control node CNN-1.This step by with by corral around Reference numeral 1 and mark the arrow diagramming that " IAM<> " be associated.
(2) follow-on-call Controlling vertex CNN-2 selects media gateway node (being media gateway node MG-2) herein, and takies the media gateway resource for connection end point.This step by with by corral around Reference numeral 2 and mark the arrow diagramming that " selecting MG resource " be associated.
(3) identifier (i.e. BCU-ID2) of media gateway MG-2 is oppositely sent at front call control node CCN-1 from follow-on-call Controlling vertex CCN-2.This step by with by corral around Reference numeral 3 and mark the arrow diagramming that " APM (BCU-ID2) " be associated.
(4) select media gateway node MG-1 at front call control node CCN-1, and take the media gateway resource for connection end point.This step by with by corral around Reference numeral 4 and mark the arrow diagramming that " selecting MG resource " be associated.
(5) triggered the beginning of loading establishing process by media gateway MG-1 at front call control node CCN-1.This step by with by corral around Reference numeral 5 and mark the arrow diagramming that " setting up carrying in the forward direction " be associated.When Internet protocol (IP) is used as user face host-host protocol and BICC is used as call control protocol, carrying sets up message via call control node CCN-1 and CCN-2 by tunnel transmission (tunnel) (not illustrating in FIG).
In fact, there is following situation continually: follow-on-call Controlling vertex CCN-2 is not knowing to have the chance selected from multiple media gateway node collection when selecting which media gateway node in front call control node CCN-1.Therefore, do not exist the media gateway node selected in follow-on-call Controlling vertex CCN-2 also can in front call control node CCN-1 by the guarantee selected.If do not select public medium gateway node MG at front call control node CCN-1 and follow-on-call Controlling vertex CCN-2, then may obtain the user face route of unnecessary length.This causes effectively to use Internet resources.
Fig. 2 illustrates the exemplary cases that of can occur is possible.Illustrated exemplary cases helps to understand some potential problems of the present invention in more detail.In this case, suppose before calling can be routed to destination network (such as public switched telephone network (PSTN)), such as because intelligent network (IN) intercommunication, follow-on-call Controlling vertex CCN-2 must play notice (such as see reference document [1] part 14.1.1).At the end of call setup, relate to the media gateway node MG at three website places in a call.
In fig. 2, dotted line describes signaling or chain of command transfer of data.Solid line (plainline) describes user plane data transfer.
Cause the step setting up calling as follows:
(1) by set up message from mobile terminal (illustrating in the radio access network RAN on graphic left-hand side) be sent in website 1 at front call control node CCN-1.Website is the physical location that wherein have accumulated the function be associated with one or more node.This step by with by corral around Reference numeral 1 and mark the arrow diagramming that " setting up () " be associated.
(2) BICCIAM message is sent at front call control node CCN-1 to the follow-on-call Controlling vertex CCN-2 in website 2.This step by with by corral around Reference numeral 2 and mark the arrow diagramming that " IAM () " be associated.
(3) such as because intelligent network (IN) intercommunication, follow-on-call Controlling vertex CCN-2 must play notice.This step by comprise by corral around Reference numeral 3 and the text prompt balloon of mark " CCN identifies must play notice " illustrate.
(4) follow-on-call Controlling vertex CCN-2 selects media gateway node to set up carrying (user face) and plays to notice.In this example, follow-on-call Controlling vertex CCN-2 selects the media gateway MG-3 in website 3.This step by with by corral around Reference numeral 4 and mark the arrow diagramming that " selecting MG resource and play to notice " be associated.
(5) identifier of media gateway MG-3 is oppositely sent at front call control node CCN-1 by follow-on-call Controlling vertex CCN-2.This step by with by corral around Reference numeral 5 and mark the arrow diagramming that " APM (BCU-ID3) " be associated.
(6) in this example, assuming that can not media gateway node MG-3 be selected at front call control node CCN-1.Therefore, select another media gateway node at front call control node CCN-1, such as, media gateway node MG-1 in website 1.This step by with by corral around Reference numeral 6 and mark the arrow diagramming that " selecting MG node " be associated.
(7) set up carrying between the media gateway node MG-3 in the media gateway node MG-1 in website 1 and website 3 and play and notice.This step by with by corral around Reference numeral 7 and mark and " set up and carry; MG-3 plays notice " arrow diagramming that is associated.
(8) follow-on-call Controlling vertex CCN-2 continues call setup.It identifies this calling must be routed to public switched telephone network (PSTN) illustrated on the lower right corner of Fig. 2.This step by comprise by corral around Reference numeral 8 and the mark text prompt balloon diagram that " continues call setup, route the call to PSTN ".
(9) follow-on-call Controlling vertex CCN-2 selects the media gateway node MG that user face can be connected to public switched telephone network (PSTN).Herein, follow-on-call Controlling vertex CCN-2 selects the media gateway node MG-4 in website 4.This step by with by corral around Reference numeral 9 and mark the arrow diagramming that " selecting the MG resource with PSTN intercommunication " be associated.
(10) final foundation between media gateway node MG-3 and media gateway node MG-4 carries.This step by with by corral around Reference numeral 10 and mark the arrow diagramming that " set up and carry " be associated.
Draw thus, call setup relates to three websites, i.e. website 1 (wherein positioning media gateway node MGW-1), website 3 (wherein positioning media gateway node MGW-3) and website 4 (wherein positioning media gateway node MGW-4).
Fig. 3 a and 3b respectively illustrates method according to an embodiment of the invention and network configuration.First call control node (CCN) 6 starts negotiations process S100.The part S600 of the negotiations process S100 performed by call control node 6 comprises the step of the message of the list being sent S102 mark at least two media gateway 4 (not illustrating in Fig. 3 a and 3b) by communication network 2 to the second call control node (CCN) 8.
This makes the first call control node 6 to notify, and this first call control node 6 of the second call control node 8 can select which media gateway 4 for calling to be set up.So this second call control node 8 has the chance of the list of the media gateway 4 for calling to be set up proposed by consideration.
Embodiment illustrated in Fig. 3 a and 3b, particularly including sub-embodiment, in this sub-embodiment, does not have to provide for the second call control node 8 ability making it can understand the message of the list of mark at least two media gateway.When not needing amendment first call control node 6, providing never promising its to provide and making its second call control node 8 can understanding the ability of the message of the list of mark at least two media gateway to providing seamlessly transitting of the second call control node 8 of the ability understanding such message for it.
Fig. 4 a and 4b respectively illustrates method according to an embodiment of the invention and network configuration.Negotiations process S100 comprises the part S600 performed by the first call control node 6 and part S800 performed by the second call control node 8.This first call control node 6 sends S102 by communication network 2 to the second call control node 8 and identifies the message that this first call control node 6 can select the list of at least two media gateway 4 for calling to be set up.
In the part S800 of negotiations process S100, the second call control node 8 receives S104 and identifies the first call control node 6 and think the message of list of at least two media gateway 4 being suitable for calling to be set up.This second call control node 8 can not select (one or more) media gateway for described calling from list removing S106 node 8.Then, this second call control node 8 is from may modified list select S108 will be used for the media gateway 4 of calling to be set up.Finally, this second call control node 8 sends the message of the media gateway 4 selected by S110 mark to this first call control node 6.
For step S106, statement " (one or more) media gateway " herein means a media gateway or multiple media gateway.But, if be all confirmed as selecting for calling by all media gateway of the list of this message identifier, then do not need call control node to remove media gateway identifier.Therefore, although negotiations process S100 comprises namely provide removing step S106, but as practical implementation S100, removing step S106 is optional, and verification step can be equivalent to when meeting one or more condition when unactual removing identifier.In one embodiment, negotiations process S100 comprises deterministic process (not shown), whether this deterministic process can be selected for this calling by each media gateway 4 of received message identifier for determining, and if words that no, which not selectable media gateway 4 is this deterministic process for removing.This is also applied to the step S118 described subsequently.
Fig. 5 a and 5b respectively illustrates method according to an embodiment of the invention and network configuration.As compared to Fig. 4 a with 4b, the method of Fig. 5 a and 5b and configuration additionally illustrate by the first call control node 6 receive S112 identify selected by the step of message of media gateway, and be used in received message the selected media gateway that identifies to complete S114 or to have attempted the step of calling to be set up.Fig. 5 a and 5b illustrate comprise from the first call control node 6 to the second call control node 8 and negotiations process S100 that the double-direction control face of the information that then turns back to first node 6 from Section Point 8 exchanges.
Fig. 6 a and 6b respectively illustrates method according to an embodiment of the invention and network configuration.Especially, negotiations process S100 comprises for participating in the part S600 performed by the first call control node 6 that foundation is called out and the part S700 performed by the 3rd call control node 7 or MidCall Controlling vertex.
This first call control node 6 sends to the second call control node 8 message that mark first node 6 thinks the list of at least two media gateway 4 being suitable for calling to be set up by the Part I 2a of communication network 2.When sending message to the second call control node 8, this message is transmitted via the 3rd call control node 7 receiving this message of S116.Then from list removing S118, it can not select (one or more) media gateway 4 for this calling to 3rd call control node 7.If all media gateway 4 of list are all suitable for the calling will set up by the 3rd node 7, then not from this list removing media gateway 4.Therefore, this removing step S118 is verification step.Then the 3rd node 7 forwards to the second call control node 8 message that S120 identifies the list that may be modified by the Part II 2b of communication network 2.
As similarly with reference to figure 3a and 3b explain, in Fig. 6 a and 6b, illustrated embodiment is particularly including sub-embodiment, in this sub-embodiment, not for the second call control node 8 provides the ability making it can understand the message of the list of mark at least two media gateway.When not needing amendment first call control node 6 and the 3rd call control node 7 (both all prepares the process S100 that holds consultation), provide from disable (non-enabled) second call control node 8 seamlessly transitting to enable (enabled) node 8.
Fig. 7 a and 7b respectively illustrates method according to an embodiment of the invention and network configuration.In this embodiment, the negotiations process S100 part S800 that comprises the part S600 performed by the first call control node 6, the part S700 performed by the 3rd call control node 7 and performed by the second call control node 8.
That is, the first call control node 6 via the 3rd call control node 7 to send message with particular reference to the mode illustrated in Fig. 6 a and 6b to the second call control node 8.For the sake of clarity, do not illustrate in figure 7 a in the forward direction by the transition of the 3rd call control node 7, and only represented by three point " ... " coming.As explained above, this message identifier is thought the list of at least two media gateway 4 being suitable for calling to be set up together with the 3rd node 7 by first node 6.Second call control node 8 received S104 and this list for the treatment of S 106, S108 before the message back sending the media gateway 4 selected by S110 mark to the first call control node 6.When Section Point 8 sends the message of the media gateway 4 selected by mark to first node 6, transmit this message via the 3rd call control node 7.3rd node 7 receives the message of the media gateway 4 selected by S122 mark.3rd call control node selects S124 to be the media gateway 4 that will be used for calling to be set up the media gateway 4 identified by the message sent from Section Point 8.Then, this message of S126 is forwarded to the first call control node 6.
Fig. 8 a and 8b respectively illustrates method according to an embodiment of the invention and network configuration.Fig. 8 b particularly show a series of exemplary media gateway 4.
The method comprises protocol procedures S100, it part S800 comprising the part S600 performed by the first call control node 6, the part S700 performed by the 3rd call control node 7 and performed by the second call control node 8.Each call control node (i.e. the first call control node 6, second call control node 8 and the 3rd call control node 7) participates in setting up this calling by their respective part S600, S700 and S800 performing negotiations process S100.
In more detail, the first call control node 6 sends the message that S102 mark is considered to be suitable for the list of at least two media gateway 4 of calling to be set up.This message sends S102 by first node 6 on the part 2a of communication network 2.The message sent from first node 6 to the second call control node 8 is received S116 by the 3rd call control node 7.3rd node 7 from by received message identifier list remove S118 it can not select for this calling (one or more) media gateway 4 (as explained above, if all media gateway can be selected, then do not remove media gateway).Then it forwards to the second call control node 8 message that S120 identifies the list that may be modified.This message sends S120 by the 3rd node 7 on the part 2b of communication network 2.
Second call control node 8 receives S104 message via the 3rd call control node 7 from the first call control node 6.Section Point 8 from by received message identifier list remove S106 it can not select for this calling (one or more) media gateway 4 (as explained above, if all media gateway can also be selected at this one-phase, then do not remove media gateway).Then it selects S108 will be used for the media gateway 4 of calling to be set up from this list.Then second call control node 8 sends the message of the media gateway 4 selected by S110 mark to the first call control node 6.This message sends S110 by Section Point 8 on the part 2b of communication network 2.
When the second call control node 8 sends the message of the media gateway 4 selected by mark to the first call control node 6, first this message received by the 3rd call control node 7.3rd node 7 receives the message of the media gateway 4 selected by S122 mark, and selects S124 to be the media gateway that will be used for calling to be set up the media gateway 4 identified in the received message.Then, it forwards the message of the media gateway 4 selected by S126 mark to the first call control node 6.This message sends on the part 2a of communication network 2.
First call control node 6 receives the message of media gateway 4 selected by S112 mark, and is used in the selected media gateway 4 that identifies in received message to complete S114 or to have attempted calling to be set up.
Therefore, can by considering to set up this calling to the constraint of first, second, and third call control node 6,8,7.Although Fig. 8 a and 8b illustrates the embodiment wherein using a MidCall Controlling vertex 7, more than one MidCall Controlling vertex can participate in setting up calling.First MidCall Controlling vertex (path wherein between the first and second call control nodes 6,8 does not exist MidCall Controlling vertex) or additional MidCall Controlling vertex (path wherein between the first and second call control nodes 6,8 has existed one or more MidCall Controlling vertex) can at any time be added in communication network 2, and do not need amendment first or second call control node (or any MidCall Controlling vertex existed, if any).
When using herein, word in the statement such as " sending message to destination node " etc. " to " to be not precluded within before arriving destination node message by one or more transition of intermediate node.Although send message to destination node, do not get rid of this message does not arrive destination node situation because of any reason (such as communication failure).Word equally, the statement of such as " from source node receipt message " etc. " from " to be not precluded between source node message transfer and the step receiving this message message by one or more transition of intermediate node.
Fig. 9 illustrates method according to an embodiment of the invention.
This embodiment of the present invention is provided in the process of holding consultation between call control node and the media gateway node that can use in a call.This negotiations process S100 provides the chance of deciding through consultation public medium gateway node for one or more follow-up call control node.The resource that such selection improves in network uses.
The call control node 6 sending call setup message (IAM in such as BICC) in the forward direction adds the list being suitable at least two media gateway node 4 of this calling to this message.
Any follow-up call control node 7,8 can not select the media gateway node 4 for this calling from list removing call control node 7,8.If they can both be selected, then do not remove media gateway node 4.The call control node not controlling any media gateway (node is reconciled in such as calling) also transmits this list pellucidly.
The call control node such as must setting up user face because playing notice selects media gateway node from the negotiation list of media gateway node.Send the identifier of selected media gateway node 4 in backward direction, to provide the chance selecting identical media gateway node 4 to follow-on-call Controlling vertex 6,7.
More specifically, Fig. 9 illustrates media gateway node selection or consults.
As the replacement of the list to transmission media gateway node identifier, the identifier for a group media gateway node 4 can also be sent.When intermediate node 7 is wanted from this list removing identifier BCU-ID, it must select the new identifier of the list of the identifier BCU-ID representing this amendment, and wherein described identifier BCU-ID is actually the identifier for a group media gateway node 4 in this case.
In one embodiment, method of the present invention goes for follow-on-call Controlling vertex 4 when first selecting media gateway node 4, such as, using in the BICC forwarding loading establishing process.For with reference in the following discussion of figure 9, forward carrying foundation assuming that use.
The name of node 4, list and other entry is obtained from Fig. 1.
Be called as originating call Controlling vertex CCN herein orgthe call control node CCN of 6 (they correspond to the first call control node 6 described before) org6 start media gateway node consults or selects, and is configured to the step that performs below:
Step (1): originating call Controlling vertex CCN org6 structures can be used to the list of the identifier of media gateway (MG) node setting up calling.This list is called as BCU-IDlist herein org.This by with by corral around Reference numeral 1 and mark and " construct the list (BCU-IDlist of the identifier be associated with the MG node being applicable to call out org) " the text prompt balloon that is associated diagram.This list is added to the call setup message being sent to next call control node (CCN).This by with by corral around Reference numeral 2 and mark " IAM (BCU-IDlist org) " arrow diagramming that is associated.This next call control node is MidCall Controlling vertex CCN tranor stop (terminating) call control node CCN term.
Step (2): as by with by corral around Reference numeral 9 and mark " APM (BCU-ID back-2) " illustrated in the arrow that is associated, as originating call Controlling vertex CCN org6 when receiving reverse message, then:
Step (2.1): if this message comprises media gateway node identifier BCU-ID back-2, then originating call Controlling vertex CCN orgwhether 6 these identifiers of checking are at original list BCU-IDlist org) middle appointment.
Step (2.1.1): if specify received identifier in original list, then originating call Controlling vertex CCN org6 select this media gateway node 4 for call setup.This by with by corral around Reference numeral 10 and mark " if BCU-ID backat BCU-IDlist orgin be sent out, accept this BCU-ID back" be associated text prompt balloon diagram.
Step (2.1.2): otherwise, originating call Controlling vertex CCN org6 from original list BCU-IDlist orgfor call setup selects any media gateway node 4.
Step (2.2): if this message does not comprise media gateway node identifier, then originating call Controlling vertex CCN org6 from original list BCU-IDlist orgfor call setup selects any one media gateway node 4.In one embodiment, do not allow to receive the reverse message without media gateway identifier, and this can cause setting up unsuccessfully.
Such as, if Bearer Independent Call Control Protocol is used as call control protocol, then list BCU-IDlist orgbe added to initial addressed messages (IAM) message.Received identifier BCU-ID is received in confirmation PATH (APM) message back.
In one embodiment, the list of the call control node (calling reconcile node, not shown) not controlling media gateway node transmission medium gateway node identifier pellucidly.
Call transmission is set up message but the call control node of the media gateway node for calling out must be selected to be called as MidCall Controlling vertex CCN trans(it corresponds to the 3rd call control node 7 as mentioned above).Such call control node 7 performs step below:
Step (1): MidCall Controlling vertex CCN trans7 receipt of call set up message (initial addressed messages (IAM) message in such as BICC).This by with by corral around Reference numeral 2 and mark " IAM (BCU-IDlist org) " arrow diagramming that is associated.
Step (1.1): if this message comprises the list BCU-IDlist of media gateway node identifier org, then MidCall Controlling vertex CCN trans7 perform step below:
Step (1.1.1): MidCall Controlling vertex CCN trans7 remove the identifier BCU-ID of any the unknown from list.If all media gateway node identifier BCU-ID are known, then do not remove any identifier.
Step (1.1.2): MidCall Controlling vertex CCN trans7 from this list removing with can not by this MidCall Controlling vertex CCN transthe 7 any identifier BCU-ID be associated for the media gateway node 4 of calling out.If all media gateway node identifier BCU-ID can be used, then do not remove any identifier.
Step (1.1.1) and step (1.1.2) by with by corral around Reference numeral 3 and mark and " remove the identifier of any the unknown.Removing any identifier of being associated with the MG node not being suitable for this calling " the text prompt balloon that is associated illustrates.
Step (1.1.3): MidCall Controlling vertex CCN trans7 according to the remaining list BCU-IDlist of mode process below trans:
Step (1.1.3.1): if be left at least one element, then MidCall Controlling vertex CCN in the list trans7 are being sent to the call setup message IAM repeating list BCU-IDlist of follow-on-call Controlling vertex trans.This by with by corral around Reference numeral 4 and mark " IAM (BCU-IDlist trans) " arrow diagramming that is associated.
Step (1.1.3.2): if this list is empty, then MidCall Controlling vertex CCN trans7 media gateway node starting to point to follow-on-call Controlling vertex are consulted.As for originating call Controlling vertex CCN orgdescribed is such, this MidCall Controlling vertex CCN trans7 construct and send BCU-ID list.In other words, this MidCall Controlling vertex CCN in this case trans7 serve as originating call Controlling vertex CCN org.
Step (1.2): if the call setup message received does not comprise the list BCU-IDlist of media gateway node identifier org, then as originating call Controlling vertex CCN orgdescribed by 6, this MidCall Controlling vertex CCN trans7 start media gateway node consults.In other words, equally in this case, this MidCall Controlling vertex CCN trans7 show to seem with it be originating call Controlling vertex CCN org.
Step (2): as by with by corral around Reference numeral 7 and mark " APM (BCU-ID back-1) " illustrated in the arrow that is associated, as this MidCall Controlling vertex CCN trans7 when receiving reverse message, and it performs step below:
Step (2.1): if this message comprises media gateway node identifier BCU-ID back-1, then MidCall Controlling vertex CCN translist (the BCU-IDlist whether 7 these identifiers of checking are forwarding before trans) in be designated.
Step (2.1.1): if the list BCU-ID list forwarded transin specify received identifier, then this MidCall Controlling vertex CCN trans7 is call setup selection media gateway node 4.This by with by corral around Reference numeral 8 and mark " if BCU-ID backat BCU-IDlist orgin be sent out, accept this BCU-ID back" be associated text prompt balloon diagram.
Step (2.1.2): otherwise, this MidCall Controlling vertex CCN trans7 for call setup selection is at the list BCU-IDlist of the media gateway sent before transin any one media gateway node 4 of listing.In one embodiment, this is also applied to the situation that the media gateway wherein returned is the element in list BCU-IDlist-tran, and perform step 2.1.1, but it can not select this media gateway (namely taking period existence mistake in media gateway) because of some reasons.
Step (2.2): if reverse message does not comprise media gateway node identifier,
Step (2.2.1): this MidCall Controlling vertex CCN trans7 select the list BCU-ID " st that sending before for call setup transin any media gateway node 4 of listing.
In one embodiment, if reverse message does not identify media gateway, then this call setup failure (namely can not successfully complete).
Step (2.3): the BCU-ID transmitting selected media gateway node in backward direction, as by with by corral around Reference numeral 9 and mark " APM (BCU-ID back-2) " arrow diagramming that is associated.
The call control node stopping media gateway node negotiation is called as end call Controlling vertex CCN term8 (they correspond to the second call control node 8 as previously described), it performs step below:
Step (1): this end call Controlling vertex CCN term8 receipt of call set up message (initial addressed messages (IAM) message in such as BICC).This by with by corral around Reference numeral 4 and mark " IAM (BCU-IDlist tran) " arrow diagramming that is associated.
Step (1.1): if this message comprises the list of media gateway node identifier, then this end call Controlling vertex CCN term8 perform step below:
Step (1.1.1): this end call Controlling vertex CCN term8 remove the media gateway node identifier BCU-ID of any the unknown from this list.If all media gateway identifier BCU-ID are known, then do not remove any identifier.
Step (1.1.2): this end call Controlling vertex CCN term8 remove from this list any media gateway node identifier BCU-ID be associated with the media gateway node 4 that can not be used for calling out.If all media gateway node identifier BCU-ID can be used, then do not remove any identifier.
Step (1.1.1) and step (1.1.2) by with by corral around Reference numeral 5 and mark and " remove the identifier of any the unknown.Removing any identifier of being associated with the MG node not being suitable for this calling " the text prompt balloon that is associated illustrates.
Step (1.1.3): this end call Controlling vertex CCN term8 according to mode process remaining list BCU-ID list below trans:
Step (1.1.3.1): if be left at least one element, then end call Controlling vertex CCN in the list term8 select in them, and use the media gateway node 4 be associated to set up user face.This by with by corral around Reference numeral 6 and mark " from remaining list (BCU-IDlist term) select any MG " the text prompt balloon that is associated diagram.
Step (1.1.3.2): if this list is empty, then this end call Controlling vertex CCN term8 select any media gateway node 4 being applicable to this calling.
Step (1.1.4): this end call Controlling vertex CCN termbCU-ID (the BCU-ID of the media gateway node selected by 8 reverse transmissions back-1).This by with by corral around Reference numeral 7 and mark " APM (BCU-ID back-1) " arrow that is associated illustrates.
Step (1.2): if the call setup message received does not comprise the list of media gateway node identifier, then this end call Controlling vertex CCN tern8 select any media gateway node being applicable to this calling.
In one embodiment, as the replacement of the list to transmission media gateway identifier BCU-ID, the identifier BCU-ID being used for a group or a group media gateway node is sent mGG.This group or this group of media gateway can be defined in other somewhere.In other words, in this embodiment, media gateway group identification is the placeholder of the list for the media gateway defined in other somewhere.This meaning:
A) definition will known for each media gateway in call control node;
B) when each media gateway in media gateway group belongs to (in a) definition) media gateway group known in call control node, there are one or more definition of media gateway group; And
C) each media gateway group has the group identification be associated.
This media gateway group can be called as clearly defined media gateway group (MGG).
Such as, let as assume that and define media gateway MGw-1, MGw-2, MGw-3...MGw-7 in call control node.Then, such as can be defined as follows media gateway group:
MGG-1＝{MGw-1，MGw-2，MGw-3}；
MGG-2={MGw-1, MGw-4, MGw-5}; And
MGG-3＝{MGw-5，MGw-6}.
Such media gateway node can be consulted to be incorporated in BICC according to mode below.If BICC is used as call control protocol, then utilizes and define identifier BCU-ID with definition for the data format that the BCU-ID (5 eight bit bytes) of Bearer Independent Call Control Protocol is identical mGG.When without any amendment, this value can be transmitted by standard BICC message.Do not know that any node of this value must ignore this parameter (BICC standard).At support BCU-ID mGGuse node in, this value is counted as the identifier for one group of media gateway node, and perform media gateway node consult.
Figure 10 a illustrates call control node according to an embodiment of the invention.Be called as herein and make a start or the call control node of the first call control node 6 is configured to participate in setting up calling in the communication network 2, and participate in the media gateway 4 consulting to be used for this calling.This call control node 6 is configured to operate in the control plane and comprises another call control node 8 (not shown in figure loa) of being configured in this chain of command and sends the transmitter 62 that mark is considered to be suitable for the message of the list of at least two media gateway 4 of calling to be set up.
Figure 10 b illustrates call control node according to an embodiment of the invention.Except comprising with reference to except the transmitter 62 described by figure 10a, this call control node 6 also comprises: receiver 64, and it is configured for the message of the media gateway 4 received selected by mark; And completer (completor) 66, it is configured to be used in the selected media gateway 4 identified in received message and has come or attempted calling to be set up.
Figure 11 illustrates call control node according to an embodiment of the invention.This call control node is called as termination or the second call control node 8 herein.It is configured to participate in setting up calling in the communication network 2.This end call Controlling vertex 8 is configured to operate in the control plane, and comprises receiver 82, remover (remover) 84, selector 86 and transmitter 88.This receiver 82 is configured to the message receiving the list of mark at least two media gateway 4 from another call control node 6 or 7 (not illustrating in fig. 11) chain of command.This remover 84 is configured to remove from the list by received message identifier the media gateway 4 that call control node 8 can not select for this calling.This selector 86 is configured to the media gateway selecting to be used for calling to be set up from list.This transmitter 88 is configured to the message sending the media gateway 4 selected by mark to other call control node 6 or 7.
Figure 12 a illustrates call control node according to an embodiment of the invention.This call control node is called as centre or the 3rd call control node 7 herein.This call control node 7 comprises receiver 72, remover 73 and transponder 74.This receiver 72 is configured to receive the message sent to other call control node 8 (not illustrating in Figure 12 a) of second in this chain of command or another MidCall Controlling vertex 7 (not illustrating in Figure 12 a) from other call control node 6 (not illustrating in Figure 12 a) of first chain of command or another MidCall Controlling vertex 7 (not illustrating in Figure 12 a), the wherein list of this message identifier at least two media gateway.This remover 73 is configured to remove from the list by received message identifier the media gateway 4 that call control node 7 can not be selected for this calling.If all media gateway can be selected, then from this list, do not remove media gateway identifier.If can select an only media gateway from this list, then this list remains next element.If can not select media gateway from this list, then this list is empty, and can create new media gateway list based on the constraint of this call control node 7.Finally, this transponder 74 is configured to the message forwarding this list of mark to second other call control node 8.
Figure 12 b illustrates MidCall Controlling vertex 7, and it comprises the call control node of Figure 12 a and the function of receiver 75, selector 76 and transponder 77.This receiver 75 is configured to receive by other call control node 8 (not illustrating in Figure 12 b) of second in chain of command or the message that sent to other call control node 6 (not illustrating in Figure 12 b) of first in this chain of command or another MidCall Controlling vertex 7 (not illustrating in Figure 12 b) by another MidCall Controlling vertex 7 (not illustrating in Figure 12 a).Media gateway selected by this message identifier.This selector 76 is configured to the media gateway 4 identified in the received message to be chosen as the media gateway that will be used for calling to be set up.Finally, this transponder 77 is configured to the message forwarding the media gateway 4 selected by mark to first other call control node 6.
The physical entity comprising call control node and media gateway according to the present invention can comprise or store the computer program comprising instruction, to make, when performing described computer program on this physical entity, to perform step according to an embodiment of the invention and process.The invention still further relates to such for performing the computer program according to method of the present invention, and relate to any storage for performing the computer-readable medium of the computer program according to method of the present invention.
Herein when used term " transmitter ", " receiver ", " completer ", " remover ", " selector " and " transponder ", not with regard to how Distributed Call Controlling vertex these elements and about how rendezvous element retrains.That is, the component of unit can be distributed on different software or hardware component or for bringing in the equipment of expectation function.The element of multiple uniqueness can also be assembled with the function providing these to expect.
Any one element above-mentioned of call control node can be implemented in hardware, software, field programmable gate array (FPGA), application-specific integrated circuit (ASIC) (ASIC), firmware etc.
In other embodiments of the invention; use dispensing device, receiving system, finishing device, removing device, choice device or retransmission unit respectively; or respectively with transmitting element, receiving element, complete any one that unit, removing unit, selected cell or retransmission unit replace above-mentioned and/or claimed transmitter, receiver, completer, remover, selector and transponder, to perform the function of this transmitter, receiver, completer, remover, selector and transponder respectively.
In other embodiments of the invention, the form of the intelligible process of computer, method etc. that computer-readable instruction can be used such as to call the turn with the machine word of any kind, and/or implement any one in said process, the part of process and/or step with the form being embedded in the software on firmware, integrated circuit etc.
Although describe the present invention on the basis of the example described in detail, the example of this detailed description only for providing better understanding for those skilled in the art, and is not intended to limit the scope of the invention.More properly, scope of the present invention is defined by the appended claims.

Claims (8)

1. for the method by selecting the media gateway (4) that will be used for calling out to set up described calling in communication network (2), described media gateway (4) is in user face, described method comprises the negotiations process (S100) being at least provided with following steps, wherein:
The first call control node (6) in chain of command sends (S102) to the second call control node (8) in described chain of command and identifies the message being considered to the list of at least two media gateway (4) being suitable for calling to be set up
Wherein said negotiations process (S100) is also provided with following steps, wherein said second call control node (8)
(S104) described message is received from described first call control node (6);
The media gateway (4) that (S106) described second call control node (8) can not select for described calling is removed from the list by received message identifier;
Select (S108) that the media gateway (4) of calling to be set up will be used for from described list; And
The message of the media gateway (4) selected by (S110) mark is sent to described first call control node (6).
2. method according to claim 1, wherein sending (S102) described message by described first call control node (6) to described second call control node (8) is in the forward direction, and described direction is the direction established call connection.
3. method according to claim 1, wherein said negotiations process (S100) is also provided with following steps, wherein said first call control node (6)
Receive the message of the media gateway (4) selected by (S112) mark; And
Be used in the selected media gateway (4) identified in received message come (S114) or attempted calling to be set up.
4. method according to claim 1 and 2, wherein said negotiations process (S100) is also provided with following steps, wherein the 3rd call control node (7)
Receive the message that (S116) is sent to described second call control node (8) by described first call control node (6);
The media gateway (4) that (S118) described 3rd call control node (7) can not select for described calling is removed from the list by received message identifier; And
The message that (S120) identifies described list is forwarded to described second call control node (8).
5. what performed by the call control node (8) in chain of command participates in for the media gateway (4) that will be used for calling out by selection the method setting up described calling in communication network (2), described media gateway (4) is in user face, described method comprises the negotiations process (S800) being at least provided with following steps, wherein: described call control node (8)
The message of the list of (S104) mark at least two media gateway (4) is received from another call control node (6) described chain of command;
The media gateway (4) that (S106) described call control node (8) can not select for described calling is removed from the list by received message identifier;
Select (S108) that the media gateway (4) of calling to be set up will be used for from described list; And
The message of the media gateway (4) selected by (S110) mark is sent to described another call control node (6).
6. what performed by the call control node (7) in chain of command participates in for the media gateway (4) that will be used for calling out by selection the method setting up described calling in communication network (2), described media gateway (4) is in user face, described method comprises the negotiations process (S710) being at least provided with following steps, wherein: described call control node (7)
Receive the message that (S116) sends from other call control node of first described chain of command (6) to other call control node of second in described chain of command (8), the list of described message identifier at least two media gateway (4);
The media gateway (4) that (S118) described call control node (7) can not select for described calling is removed from the list by received message identifier; And
The message that (S120) identifies described list is forwarded to described second other call control node (8).
7. be configured to participate in communication network (2) and set up calling and consult to be used for the call control node (8) of the media gateway (4) of described calling, described media gateway (4) is in user face, and described call control node (8) is configured to operate in the control plane and comprise:
Receiver (82), it is configured to the message of the list receiving mark at least two media gateway (4) from another call control node (6) described chain of command;
Remover (84), it is configured to remove from the list by received message identifier the media gateway (4) that described call control node (8) can not select for described calling;
Selector (86), it is configured to the media gateway selecting to be used for calling to be set up from described list; And
Transmitter (88), it is configured to the message sending the media gateway (4) selected by mark to described another call control node (6).
8. be configured to participate in communication network (2) and set up calling and consult to be used for the call control node (7) of the media gateway (4) of described calling, described media gateway (4) is in user face, and described call control node (7) is configured to operate in the control plane and comprise:
Receiver (72), it is configured to receive the message sent to other call control node of second in described chain of command (8) from other call control node of first described chain of command (6), the list of described message identifier at least two media gateway (4);
Remover (73), it is configured to remove from the list by received message identifier the media gateway (4) that described call control node (7) can not select for described calling; And
Transponder (74), it is configured to the message forwarding the described list of mark to described second other call control node (8).
CN200880106991.4A 2007-09-12 2008-09-10 For setting up the method for calling in a communication network Expired - Fee Related CN101803332B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US97170407P 2007-09-12 2007-09-12
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PCT/EP2008/061975 WO2009034098A1 (en) 2007-09-12 2008-09-10 Method for establishing a call in a communication network

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