CN101917745A - The system, equipment and the method that are used for the capability negotiation of communication network - Google Patents

The system, equipment and the method that are used for the capability negotiation of communication network Download PDF

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CN101917745A
CN101917745A CN2010101570358A CN201010157035A CN101917745A CN 101917745 A CN101917745 A CN 101917745A CN 2010101570358 A CN2010101570358 A CN 2010101570358A CN 201010157035 A CN201010157035 A CN 201010157035A CN 101917745 A CN101917745 A CN 101917745A
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preference
ability
medium gateway
signalling point
node
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CN101917745B (en
Inventor
L·格拉夫
M·霍利斯
P·霍利斯
N·迪基克
D·德尼科罗
S·特里尔
C·格罗维斯
S·拉姆斯特伦
I·赖蒂纳
L·卡里
J·诺格拉-罗德里格茨
B·丁勒
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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Priority claimed from GB9911441A external-priority patent/GB2350257A/en
Priority claimed from GB9914654A external-priority patent/GB2351414A/en
Priority claimed from GB9914700A external-priority patent/GB2351416B/en
Priority claimed from GB9915366A external-priority patent/GB2352127A/en
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of CN101917745A publication Critical patent/CN101917745A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
    • H04M7/0072—Speech codec negotiation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/06—Arrangements for interconnection between switching centres using auxiliary connections for control or supervision, e.g. where the auxiliary connection is a signalling system number 7 link
    • H04M7/063—Arrangements for interconnection between switching centres using auxiliary connections for control or supervision, e.g. where the auxiliary connection is a signalling system number 7 link where the telephone network is a network other than PSTN/ISDN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0478—Provisions for broadband connections
    • 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
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    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
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    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5603—Access techniques
    • H04L2012/5604—Medium of transmission, e.g. fibre, cable, radio
    • H04L2012/5607—Radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
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    • H04L12/56—Packet switching systems
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    • H04L2012/5634—In-call negotiation
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    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
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    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
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    • H04L2012/5652—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly
    • H04L2012/5653—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly using the ATM adaptation layer [AAL]
    • H04L2012/5656—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly using the ATM adaptation layer [AAL] using the AAL2
    • H—ELECTRICITY
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    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5671—Support of voice
    • 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
    • H04L69/24—Negotiation of communication capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2281—Call monitoring, e.g. for law enforcement purposes; Call tracing; Detection or prevention of malicious calls
    • H—ELECTRICITY
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    • 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
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    • H04Q2213/13098—Mobile subscriber
    • H—ELECTRICITY
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    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13176—Common channel signaling, CCS7
    • H—ELECTRICITY
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    • H04Q2213/13196—Connection circuit/link/trunk/junction, bridge, router, gateway
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13209—ISDN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1329—Asynchronous transfer mode, ATM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13339—Ciphering, encryption, security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13345—Intelligent networks, SCP
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1338—Inter-exchange connection
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/02—Inter-networking arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/24—Interfaces between hierarchically similar devices between backbone network devices

Abstract

A kind of method of consultation call ability between the signalling point in telecommunication system.This method is included on the call control layer and sends an ability preference or preference priority inventory from the signalling point that starts to terminating signalling point or signaling transfer point.The preference that signalling point sends over if terminating signalling point or signaling transfer point are accepted to start just sends first ability from terminating signalling point or signaling transfer point to the signalling point that starts and accepts message on call control layer.

Description

The system, equipment and the method that are used for the capability negotiation of communication network
The application Chinese patent application No.00810481.6 of the same name that to be applicant Ellison Telephone Co., Ltd submit on May 9th, 2000 divides an application.
Technical field
The present invention relates to the capability negotiation method in the communication network, especially but not necessarily relate to the negotiation of suitable audio coder ﹠ decoder (codec).
Background technology
The communication network of today depends on Signaling System 7(SS-7) (SS7) to a great extent, it is connected as controlling call and handles in the network basis of signaling information transmission between the signalling point.Generally, one or more application of given signalling point will utilize SS7 to follow the peer application of other signalling point to communicate by letter with User Part with User Part.The example of User Part has ISUP (ISDNYong Hubufen) and TUP (Telephone User Part), and the example of applying portion has INAP (intelligent network application part) and MAP (MAP).Tradition SS7 protocol stack comprises message transfer part MTP1, MTP2 and MTP3, and it formats signaling message for the transmission on the physical layer, also will realize various routing functions.
In communication network, substitute traditional Signaling System Number 7 in that the Telecoms people are very interesting with non-standard (just Telecoms is non-traditional) signaling transmission mechanism.Do like this is in order to raise the efficiency, to save cost.People have considered much to utilize Internet Protocol (IP) network command transmitting information between signalling point.The advantage of ip network is that they utilize transfer resource fully by utilizing packet switching, and owing to this technology has obtained being extensive use of, so cost relatively low (comparing with the special communication technology).Also interesting other transmission technology mechanism that adopts of people comprises AAL1/2/5, FR or the like.
In communication network, be used to set up the ISUP standard that is connected with controlling call and be closely connected, can't directly it be used for other non-standard transmission technology, for example internet protocol negotiation AAL2 with Signaling System 7(SS-7).Like this, the several normal structures that comprise ITU-T, ETSI and ANSI are being considered the signaling protocol standard of controlling call at present, and it is irrelevant with these transmission mechanisms.It can be regarded as from this agreement and separate, only follow by carrying person's controlled function of user plane data foundation " pipeline " parameter and transmit between node, they are transmission mechanism special uses.The New Deal that is called with the irrelevant calling control (TICC) of transmission has kept CCF, for example is the business (for example calling transfer) that the calling between given caller and the callee activates, and the Route Selection of whole user plane data.
Separate the new network architecture that obtains and produced an open interface on calling and carrying person's key-course between controlling call entity and carrying person's controlled entity, these entities are called medium gateway controller and medium gateway respectively.Later on this open interface is called X-CP, its example has the MEGACO work of IETF and H.248 working of ITU seminar 16 (SG16).
Traditional fixed telephone network adopts pulse code modulation to come the transmission user panel data, for example the speech between the network node, fax etc.On the other hand, modern Cellular Networks usually adopts one or more encoder/decoder (being called " codec ") to come the compressed voice signal, transmits effectively by air interface and in cellular network inside.When between two networks (perhaps terminal) of supporting different or multiple audio coder ﹠ decoder (codec), having call to connect, can between these terminals, hold consultation to determine to adopt suitable codec.If do not carry out this negotiation, just need just convert another speech coding in the enterprising line code conversion of the interface of these networks from a kind of phonetic code.Consider that from resource view code conversion is of a high price, it can reduce voice quality significantly, increases the processing time delay.Therefore codec negotiation is a best choice.
Except codec negotiation, in conventional telecommunication network, usually need hold consultation at other function and parameter.For example, may need security capabilities is held consultation, for example between the node of communication network or terminal, carry out voice encryption and data encryption.
Summary of the invention
On the one hand, the invention provides a kind of between the signalling point of telecommunication system the method for consultation call ability, calling control wherein and carrying person's key-course are by independently agreement control, signalling point is by notice carrying person key-course, selection to described call control layer ability is made a response, if this selection has influence on carrying person's layer, this method comprises:
On call control layer, send an ability preference or preference priority inventory to terminating signalling point or signaling transfer point from the signalling point that starts; With
The preference that signalling point sends if terminating signalling point or signaling transfer point are accepted to start, just on call control layer from the approval of terminating signalling point or signaling transfer point to the signalling point resettability that starts.Obviously in some cases, for example terminating signalling point or the signaling transfer point ability first-selection (perhaps first-selected inventory) that signalling point sends of not accepting to start just may not can send any message of accepting, and two points all adopt the acquiescence ability in this case.Perhaps, a default message explanation can be sent and default codec will be adopted.If the codec that can not find both sides to accept, so under specific situation, will be because network be incompatible abandoned call.
The present invention is particularly suitable for consulting between the signaling forward node audio coder ﹠ decoder (codec) ability in different telecommunication networks.For example, in the Japan Telecom Co. Ltd network, can utilize the present invention to consult to adopt VSELP, PSI-CELP or mu-law encoding, wherein mu-law encoding method is the acquiescence coding method.But the present invention also can be used in other ability of negotiation, comprises security capabilities (for example voice encryption and data encryption).
The agreement that is used for holding consultation can be TICC, or certain agreement that also adopts on this one deck of CC, just user plane capability negotiation agreement.
To control these layers be that signalling point is controlled this one deck calling out selective power on this one deck of control, if this selection has influence on this one deck of carrying person by control carrying person under the situation by independent agreement control calling out control and carrying person.If suitable, can on the carrying person's layer between carrying person's exchange point, send notice subsequently, allow to set up suitable carrying person's layer resource.
Signalling point or signaling transfer point be medium gateway controller preferably.Particularly, medium gateway controller communicates with one or more gateway in carrying person's key-course.
Though support the specific option of carrying person's key-course on call control layer, call control layer there is no need to know on carrying person's key-course whether can obtain those selections.Therefore, when terminating signalling point or signaling transfer point were received capability option or option priority inventory, call control layer was held consultation with carrying person's key-course, determines the ability that carrying person's key-course can obtain.Particularly, this negotiation is to carry out between the medium gateway of the medium gateway controller of call control layer and carrying person's key-course.
Wherein preference priority inventory sends to a medium gateway controller from the signalling point that starts, and controller preferably can be revised this inventory, deletes it and knows the relevant unsupported option of medium gateway.The inventory that control channel will be revised subsequently sends to the medium gateway, and the medium gateway is then selected the option of the limit priority that the medium gateway during this time can support.Gateway can keep the essential resource of this option then, and tells medium gateway controller with this preference.Medium gateway controller can be subsequently beamed back first ability to the medium gateway controller that starts and is accepted message.
A second aspect of the present invention provides a kind of signalling point, be used for telecommunication system in another one signalling point consultation call ability, calling control wherein and carrying person's key-course are by the control of agreement independently, this signalling point comprises:
The call control department branch, be used on call control layer to terminating signalling point or signaling transfer point transmitting capacity preference or preference priority inventory and
Be used for receiving on call control layer the approval of terminating signalling point or signaling transfer point ability, the preference that signalling point sends if terminating signalling point or signaling transfer point acceptance are started is with regard to the approval of transmitting capacity; With
If the selection to the call control layer ability has influence on carrying person's layer, by notice carrying person key-course, the interface controller that the selection of described call control layer ability is made a response.
A third aspect of the present invention provides a kind of medium gateway controller of telecommunication system, and calling control wherein and carrying person's key-course are by independently agreement control, and this medium gateway controller comprises:
The call control department branch is used for from a reciprocity medium gateway controller receiving ability preference or preference priority inventory, and ability preference wherein or preference priority inventory are relevant with the connection that will set up in telecommunication system;
Controller is used to follow with the related medium gateway of medium gateway controller communicate, with the validity of the preference determining to be received at the medium gateway; And
Described call control department branch is configured to according in the determined validity of medium gateway ability preference approval message be returned described reciprocity medium gateway controller.
Fourth aspect the invention provides a kind of medium gateway of telecommunication system, and calling control wherein and carrying person's key-course are by independently agreement control, and this gateway comprises:
Carrying person's control section is used for from medium gateway controller receiving ability preference or preference priority inventory, and wherein said ability preference or preference priority inventory are relevant with the connection that will set up in telecommunication system, and are used for
Select preference according to validity at the preference of medium gateway; With
Interface controller is used to send selected preference to medium gateway controller.
The 5th aspect the invention provides a kind of method of independently calling out control and carrying person's control protocol agreement protocol option of utilizing between first, second and the 3rd node in communication network, this method comprises:
Send first call control message of the specified protocol option of supporting by described first node to Section Point from first node;
Send second call control message of the specified protocol option of supporting by described first node and Section Point to the 3rd node from Section Point; With
From the protocol option of appointment second control messages, select a protocol option.
From the protocol option of second control messages appointment, select the step of a protocol option to finish by the 3rd node.
Each call control message can comprise with a relevant priority of each specified protocol option.
First node can be an origination node.The 3rd node can be an end-node.
This method can also comprise the step whether the carrying person's layer between definite first and second node influenced by described selection step after selecting step, if this carrying person's layer is affected, just take measures to revise the parameter of carrying person's layer between first node and second node.
This method can also comprise whether carrying person's layer of judging between second node and the 3rd node is subjected to the influence of described selection step, if this carrying person's layer is affected, just take measures to revise the parameter of carrying person's layer between second node and the 3rd node.
The 6th aspect the invention provides a kind of method that audio call connects of setting up in telecommunication system, call control protocol wherein is independent of transmission mechanism, and this method comprises:
Consult first audio coder ﹠ decoder (codec) between the signalling point and the first terminating signalling point starting of described system;
Connect starting between the signalling point and the first terminating signalling point on transmission mechanism, to set up to call out according to described first audio coder ﹠ decoder (codec);
Between the first terminating signalling point and second new terminating signalling point, consult second different audio coder ﹠ decoder (codec) subsequently;
Notify the signalling point that starts with second audio coder ﹠ decoder (codec); With
In the foundation calling connection between signalling point and the described second terminating signalling point of starting, wherein said first starts signalling point as middle signalling point, and wherein supports described second audio coder ﹠ decoder (codec) just to revise the calling connection of mentioning at first if desired;
Obviously the connection of starting between signalling point and the original terminating signalling point by modification reflects new codec, and embodiment of the present invention can successfully be set up to call out between different terminating signalling points and connect.Last end-to-end connection is to set up by the connection between original terminating signalling point and new terminating signalling point on the new codec basis.This back connection is to set up after first connection is modified, though not necessarily will be like this.
Obviously, method of the present invention can only be used to start speech coding codec negotiation decision between terminating signalling point and the final terminating signalling point is not adopted under the situation of first audio coder ﹠ decoder (codec).If the result is first audio coder ﹠ decoder (codec), just there is no need to revise original connection.
Notify the step of the signalling point that starts of second audio coder ﹠ decoder (codec) to preferably include from the terminating signalling point that starts to suitable calling control (CC) message of signalling point transmission that starts.This call control message can be a modify request messages.
Call control protocol preferably is independent of calling control (TICC) agreement of transmission.
The present invention can be used in and improves existing communication network, for example based on the mobile network of GSM, DAMPS, PDC or the like, also can be used for following network, for example UMTS.
The 7th aspect the invention provides the telecommunication system that a kind of call control protocol is independent of transmission mechanism, and this system comprises:
The call control department branch, be used for consulting first audio coder ﹠ decoder (codec) between signalling point and first terminating signalling point, and be used for according to described first audio coder ﹠ decoder (codec) in the foundation calling connection on transmission mechanism between the signalling point and the first terminating signalling point of starting starting of system;
The call control department branch is used for consulting second different audio coder ﹠ decoder (codec) subsequently between the first terminating signalling point and second new terminating signalling point;
Be used for notifying the signalling point that starts with second audio coder ﹠ decoder (codec); With
Be used in the foundation calling connection between the signalling point and the second terminating signalling point of starting, wherein said first starts signalling point as middle signalling point, and wherein supports described second audio coder ﹠ decoder (codec) just to revise the calling connection of mentioning at first if desired.
Eight aspect the invention provides a kind of signalling point of communication network, and call control protocol wherein is independent of transmission mechanism, and this signalling point comprises:
The call control department branch is used for consulting first audio coder ﹠ decoder (codec) with the first terminating signalling point;
Be used for according to described first audio coder ﹠ decoder (codec) in the foundation calling connection on transmission mechanism between signalling point and first terminating signalling point of starting;
Be used to receive second audio coder ﹠ decoder (codec) of between the described first terminating signalling point and second new terminating signalling point, consulting notice and
Supporting described second audio coder ﹠ decoder (codec) just to revise the described calling that first is mentioned if desired connects.
The 9th aspect, the invention provides a kind of method that connects of calling out of between first and second mobile telephone networks, setting up, these two mobile telephone networks have at least one to comprise a radio access network part no tandem equipment in addition that is positioned at the mobile network, call control protocol wherein is independent of carrying person's transmission mechanism, and this method may further comprise the steps:
Do not have between the tandem equipment in one of mobile network's described no tandem equipment and other mobile network's equity and to hold consultation, to determine suitable audio coder ﹠ decoder (codec); With
By sending call control message with the described radio access network of the advisory of determined audio coder ﹠ decoder (codec) from relevant no tandem equipment.
Such situation may occur, that is exactly the radio access network part outside the mobile network, and each mobile network comprises a no tandem job (TFO) device.But, not necessarily must be like this, one in the middle of these mobile networks can have a no tandem equipment in radio access network.
These two mobile telephone networks can be connected to each other by a PSTN.Preferably this negotiation is to utilize the optimizer in codec mismatch solution and the no tandem work agreement to realize, no tandem work message wherein utilizes in-band signalling to send.
Described or each the no tandem equipment that preferably is positioned at radio access network outside all is positioned at a gateway mobile switching centre (GMSC), and it for example provides an interface between PSTN and the external network the mobile network.
The present invention is particularly suitable for setting up to call out between the user connecting, and one in the middle of them is the mobile subscriber of Universal Mobile Telecommunications System (UMTS) network.In this case, radio access network is a UMTS terrestrial radio access network (UTRAN) network (UTRAN) preferably, and the no tandem equipment of this network then is positioned at the edge of this UMTS core network.
The tenth aspect, the invention provides a kind of equipment that connects of calling out of between first and second mobile telephone networks, setting up, described first and second mobile telephone networks have at least one to comprise the radio access network part no tandem equipment in addition that is positioned at described mobile network, and call control protocol wherein is independent of carrying person's transmission mechanism, and this equipment also comprises:
The call control department branch is used for holding consultation between one of described mobile network's no tandem equipment and other mobile network's no a tandem equipment of equity, with definite suitable audio coder ﹠ decoder (codec) and
Be used for by sending call control message, with the advisory radio access network of determined audio coder ﹠ decoder (codec) from relevant no tandem equipment.
The tenth on the one hand, the invention provides a kind of method that connects of calling out of between first and second mobile telephone networks, setting up, each of described first and second mobile telephone networks all comprises the no tandem equipment beyond the radio access network part that is positioned at described mobile network, and call control protocol wherein is independent of carrying person's transmission mechanism, described mobile network is connected to each other by a public switch telephone network, and this method may further comprise the steps:
Between two portable terminals of first and second mobile networks registration, holding consultation respectively, to determine a suitable audio coder ﹠ decoder (codec), negotiation wherein is to utilize in the radio access network part and do not have the call control protocol signaling message that exchanges between the tandem equipment accordingly and carry out, and ISUP message sends between described no tandem equipment.
For example, start some codecs that can use among the mobile network can send to the no tandem equipment of equity from the no tandem equipment of this network with an ISUP initial address message (IAM).This message can also comprise the favorite codec of the mobile network that starts in addition.The isup message that sends in the opposite direction will illustrate the codec type that the terminating portable terminal is selected subsequently.For this negotiation procedure can be realized, need to revise the ISUP standard.
The 12 aspect, the invention provides a kind of equipment that connects of calling out of between first and second mobile telephone networks, setting up, each of described first and second mobile telephone networks all comprises the no tandem equipment beyond the radio access network part that is positioned at the mobile network, call control protocol wherein is independent of carrying person's transmission mechanism, described mobile network is connected to each other by a public switch telephone network, and this equipment comprises:
The call control department branch, be used between two portable terminals of first and second mobile networks registration, holding consultation respectively, to determine a suitable audio coder ﹠ decoder (codec), negotiation wherein is to utilize in the radio access network part and do not have the call control protocol signaling message that exchanges between the tandem equipment accordingly and carry out, negotiation wherein is to utilize radio access network part and do not have the call control protocol signaling message that exchanges between the tandem equipment accordingly and carry out, and the message of ISUP sends between described no tandem equipment.
Description of drawings
Fig. 1 illustrates a plurality of signalling points in the communication network; With
Fig. 2 (situation A) illustrates the signaling flow between the signalling point shown in Figure 1 in first embodiment of the present invention;
Fig. 2 (case B) illustrates the signaling flow between the signalling point shown in Figure 1 in second embodiment of the present invention;
Fig. 3 is the communication network that comprises medium gateway controller and medium gateway;
Fig. 4 is a flow chart that is used for the general ability negotiations process of network shown in Figure 3;
Fig. 5 illustrates the signaling flow of the intermediate node that negotiations process relates between origination node and the end-node;
Fig. 6 illustrates other one group of signaling flow of an intermediate node that relates in the process of holding consultation between origination node and the end-node;
Fig. 7 illustrates the telecommunication system of Known designs;
Fig. 8 illustrates a telecommunication system;
Fig. 9 illustrates that the codec negotiation process relates in the system shown in Figure 8, first group of signal in first embodiment of the present invention; With
Figure 10 illustrates second group of signal that the codec negotiation process relates in the system shown in Figure 8 in second embodiment of the present invention.
Embodiment
A part of communication network that drawn in Fig. 1, it comprises two signalling points, is called node A and C later on.These two nodes may be telephone exchanges for example, and they may belong to same Virtual network operator, also can belong to heterogeneous networks operator.In this example, node A is the origination node that calling party's (not drawing) connects, the end-node that on behalf of the callee, node C connect.Each signalling point comprises that all one is called out control (CC) part and carrying person's control (BC) part, that is to say, calls out control and carrying person's controlled function and is separated into two independently protocol layers.Call control department divides formation a call control layer, and it is responsible for calling transfer and other Route Selection and controlled function.Carrying person's control section is responsible for setting up pipeline at carrying person's control section, and definite carrying person's control section is used for the size of the pipeline of transmission user panel data.
Consider carrying person's key-course now, it comprises carrying person's network, and it can be a for example ip network.In this ip network, one or more carrying person's exchange point is arranged, though the such point (Node B) that only drawn among Fig. 1.For ip network, these carrying person's exchange points will be the Internet Protocol routers.Obviously, if carrying person's network is an ATM or AAL2 network, carrying person's exchange point will be ATM or AAL2 switch respectively so.
If the calling party sends calling, for example by picking up his phone, just (calling party just) receives information to the signalling point node A that starts from the source at call control layer, and carrying person's resource requirement is described.The signalling point that starts on the basis of source information and/or signalling point and home network ability thereof is determined must be with an option inventory of terminating signalling point node C negotiation.
Node A lists possible selection subsequently in the message of dividing to call control department, it wishes to utilize this message to consult a concrete ability (the node C among Fig. 1).This message illustrates the preference degree of each option.
Node C utilizes node A to select the best option that its supports for the priority of each option appointment in this inventory, that is to say, if its support node A has shown the another one option in the inventory of liking more, node A does not just select this option.Node C tells which option node A has chosen.
If this negotiation result can influence carrying person's articulamentum, just must take adequate measures at carrying person's layer, change negotiation result.This is finished by carrying person's control protocol.Two kinds of situations might occur: forward bearer person revises (the situation A in the picture) or (case B among Fig. 2) revised to carrying person in the back.
An example of the ability that can hold consultation in order to last method is a codec capabilities.Generally speaking, all be to convert speech coding to PCM in radio access network, because this is unique phonetic matrix that the conventional fixed telephone network allows.But because conversion can destroy voice quality significantly, so some cellular standards (for example GSM, PDC) have been specified avoided the method changed when connecting between two compatible terminals (two GSM terminals that for example have identical codec).Because most current portable terminals are supported several codecs, so these methods also adopt the codec negotiation mode, but it has some important disadvantages with general negotiation mechanism comparison given here.
Audio coder ﹠ decoder (codec) or be closely connected (in PDC with mobile environment, codec is a service of MAP (MAP) agreement) or it the use of hardware and transfer resource is not optimized (in GSM, codec negotiation is the part of no tandem work agreement).Be always voice and connect distribution two code converters (TRAU) and a 64kbps channel, and no matter in fact whether change).At present, different mobile standards solve this problem with different modes, and before this without any solution.
The another one ability example that may need to hold consultation is security capabilities (voice encryption, data encryption or the like).People are very interested in this in public telecommunication network, and the foreseeable future more can be like this.But the protection user plane information has several different methods.Adopt multiple encryption algorithms and DEA at present, and many new algorithms occurred.Therefore, need to consult the mode of security capabilities in public telecommunication network, the present invention just can provide this mode.
More than describe and related to carrying person's key-course and call control layer.Fig. 3 illustrates to have the telecommunication system that control and carrying person's key-course are called out in division in further detail.This call control layer comprises a plurality of medium gateway controllers (MGC_A, MGC_B and MGC_C), and carrying person's key-course then comprises a plurality of medium gateways (MG_1～MG_6).First medium gateway (MG_1 MG_6) provides carrying person to connect on an AAL2 network, and second medium gateway (MG_2 MG_5) then provides a carrying person to connect on an ip network.(MG_3 MG_4) provides carrying person to connect on a STM network to the 3rd medium gateway.As can be seen from Figure 3, each medium gateway controller all is used for by two or three medium gateways of open interface control (X-CP_1～X-CP_3).
As mentioned above, capability negotiation carries out at call control layer, just carries out between medium gateway controller.In addition, X-CP offers device is controlled their medium gateway controller medium gateway support for medium gateways " notice " ability and option (for example ability equals compressed voice, and option equals the codec inventory).Whether X-CP also generator makes the medium gateway can carry out capability negotiation, thereby the assurance ability selects to be not only the ability based on the gateway appointment, also current available based on these abilities.If can not use, the medium gateway just might not have the resource support, and it follows medium gateway controller to consult the option that obtains.For example, medium gateway controller need provide the intelligent network service for calling, and it need be with interior notice.If medium gateway controller is selected a codec in person on the basis of the codec that the medium gateway is supported, the medium gateway just might can't obtain a TRAU for such codec at present.So the medium gateway can be refused this connection, causes dropped calls.
How to address this problem in order illustrating, to consider that medium gateway controller receives to connect first from a reciprocity medium gateway controller to set up this situation of message, this first message comprise with the relevant option inventory of concrete ability that can consult.The medium gateway controller that receives message is read the inventory of receiving, and deletes it and know the unsupported option of this medium gateway from this inventory.This medium gateway controller sends to the medium gateway by the option inventory that the X-CP interface will be revised subsequently.
The medium gateway that receives message is selected the current option with limit priority that can support of this gateway.What of this option resource needed of support the medium gateway adjust subsequently, and by the X_CP interface this selection is sent to medium gateway controller.Receive after the selected option that medium gateway controller is told above-described reciprocity medium gateway controller with this selection.
Above-described general ability negotiations process will further be illustrated with reference to flow process shown in Figure 4 below.
In some countries, local government all requires operator to allow monitored call according to law.In order to support Lawful Interception, operator all needs freely to visit the user plane data (actual speech or other data that so-called " pipeline " transmits on this one deck of carrying person just) of each calling in their networks usually.Introduced after the TICC, can come transmission user panel data (for example ATM, IP or the like) with multiple technologies, they support the user plane data that transmission is encrypted.Therefore, unless the Lawful Interception point can be determined the security feature and codec (Code And Decode) characteristic of user plane data, otherwise just can not monitored call.Therefore, codec and encryption (safety) algorithm that each BC part (two BC node between) of calling is used need be known by operator.
On the other hand, the translation of security algorithm and code conversion meeting reduce the service quality of calling significantly and bring extra delay.So, need to reduce the quantity of end-to-end code changeover point of (if possible just avoiding) each calling and the quantity of security algorithm transfer point.
A kind of method that addresses this problem is described below with reference to operating sequence shown in Figure 5.The call control department of node A (see figure 1) divides and sends that message is to the call control department branch of Node B first, and it comprises the column selection item that node A supports, also has the priority of each option.Though this method is particularly suitable for TICC, it is that it also can be used in independently agreement protocol, and this represents with abbreviation UPCN (User Part capability negotiation) in Fig. 5.
Next the call control department of Node B divides and to send that message is to the call control department branch of node C first, and it comprises the column selection item that node A and Node B are all supported, and the priority of each option.So node C selects the option with limit priority that its supports, and return first message and give Node B, comprising the option of choosing.Node B then sends the message option that explanation is chosen to node A first.
Fig. 5 illustrates two kinds of operating sequences, is designated as situation A and case B.In situation A, if the call control layer that carrying person's layer is described in the above is subjected to consulting influence, node A just takes adequate measures at carrying person's layer.For example, node A may need to change the size of supporting the needed pipeline of selected option.Next send BC message first from node A to Node B, parameters needed is described.Node B receives and analyzes the option of choosing, if carrying person's layer is subjected to this negotiation influence, just takes adequate measures at carrying person's layer.Send BC message first from Node B to node C then, carrying person's layer parameters needed between Node B and the node C is described.
For case B, the sequence of operation of carrying person's layer finishes at node A from node C.Node C analyzes the option of choosing, and takes adequate measures at carrying person's layer, if carrying person's layer is subjected to consulting influence.Send BC message first from node C to Node B, which parameter illustrates needs.The option that the Node B analysis is chosen, and take appropriate measures at carrying person's layer, if carrying person's layer is subjected to consulting influence.Send BC message first from Node B to node A then, all parameters that need are described.
Be understood that and can select one in situation A and case B, other situation also is fine certainly.For this reason, should be understood that agreement between node A and the Node B can be different from the agreement between Node B and the node C, for example these agreements can be respectively ATM and IP.May need to revise the parameter that carrying person's layer connects between a pair of node, and not need to revise other the parameter between the node.
Should be understood that above-described negotiations process can be also can be in calling is carried out when setting up calling.Latter event can be that for example the user wishes to start encryption in calling procedure.
This program can reduce counting in the network that needs the change general ability.Particularly, above-described method can be used in to make through the code conversion of the end-to-end calling of a plurality of CC part and counts or the conversion of security algorithm point is counted minimum.This method can be used in the calling by one or more network.
GCN mechanism comprises allows the CC node that starts comprise the priority of option inventory and they, the option that allows end-node utilize the priority of origination node explanation to select its to support.Machinery of consultation above-mentioned is useful when just holding consultation between two CC nodes.Here Jian Yi change expands to GCN mechanism the situation that plural CC node is arranged in the negotiation.That is to say, call out through belonging to a plurality of CC nodes of one or more telecom operators.This change relates to the following sequence of operation:
1. option inventory and priority data that the CC node that starts is supported it send to each node.
2. the option inventory received of the CC node analysis of process, the unsupported option of deletion is transmitted to next node with this inventory from this inventory.
3. option inventory and the priority received of terminating CC node analysis is selected the option with limit priority that its supports.
If carry out Lawful Interception, Lawful Interception point (node of just monitoring) thus the safety and the coding characteristic that can receive user plane data can monitored calls.
For the new architecture shown in Figure 1 of suggestion, call control protocol wherein is independent of transmission mechanism, and TICC is necessary for to call out and carries out codec negotiation before the user-plane transmissions connection is set up.Reason is that the amount of the needed transfer resource of support call depends on the codec of choosing for this calling (result who just depends on the codec negotiation process).In some cases, select a codec for calling out at the very start, but, must change codec in the latter half of calling out because change has taken place environment.Two kinds of situations that this situation can occur are:
1) in order automatically or on the basis of calling party's input to provide notice or call redirection to interact with Intelligent Network to the callee.Must select first codec that notice is provided.Calling transfer/redirect to an other side is used second codec then.
2) (CFNR) shifted in no-reply call, and it is a kind of so-called auxiliary activities.At first between A and B, negotiate first codec, give C with this call forward then, in the length preset time because B fails to reply.On the basis of the needs of C, need second codec.
Obvious superincumbent situation 1) and 2) in, and in other relevant situation, must on transmission mechanism, set up one according to the codec of selecting at first and call out to connect and transmit notice, tone etc.When changing codec subsequently, need to revise to call out to connect and support new codec.
Below with reference to Fig. 6, the signaling procedure of the network be used to utilize the TICC agreement is described, it can be set up end-to-end call for audio call and connects, and call source wherein is signaling node A ad initio, passes to first Node B or signalling point at first.This is called out and is passed to some other terminating signalling point node C subsequently.Here Shuo Ming process relates to the activation of intelligent network business, calling party wherein connects with an intelligent network network node at first, it is play one section message of prerecording and gives the calling party, just give last terminating signalling point then with this call-delivery, perhaps give the CFNR business, calling is transferred to a new terminating signalling point when the callee who connects with initial terminating signalling point fails answering call in this case.
This signaling sequence may further comprise the steps:
1. node A is established to the calling of Node B.For codec X is selected in this calling.
2. utilizing the transfer resource that is suitable for selected codec to set up transmission between node A and Node B connects.
3. Node B is with calling transfer/redirect to node C.Node C does not support codec X and selects codec Y.
4. Node B requesting node A selects the codec of this calling to change over codec Y from codec X.
5. if desired, the transmission of revising between node A and the Node B connects, to adapt to codec Y.Fig. 6 has illustrated at forward and has connected the both of these case of making amendment and transmitting connection in reverse modification to transmitting.
6. setting up the transmission that is suitable for codec Y between Node B and node C connects.
7.TICC set up calling (TICC ACM+TICC ANM).
TICC is based upon on the ISUP basis, so the signaling message title derives from ISUP.But ISUP does not comprise codec negotiation, does not comprise the codec update routine yet, therefore needs a new TICC message (TICC revises request/affirmation) to provide codec to revise ability.
Obviously, Fig. 6 has just illustrated the modification that node A is connected with reverse transmission to forward between the Node B, but is connected modification at forward with the transmission that oppositely also can carry out other.Also have, can also can oppositely set up the transmission connection at forward.
Mechanism described herein can be used in and set up the audio call connection between signalling point more than three or node.For example, starting between signalling point node A and the original terminating signalling point Node B and/or between original terminating signalling point Node B and last terminating signalling point node C, one or more is being arranged through node.Can also find out, can will call out from node C and further be transferred to another one signalling point (node D just).Do like this and need hold consultation, whether be suitable for node D to determine codec Y, if can not between node A and the Node B and the transmission between Node B and the node C connect and make amendment.This process just can extend to any one new node.
Traditional public switch telephone network (PSTN) is encoded to speech data with digital form, transmits with pulse-code modulation (PCM) mode.On the other hand, the digital mobile telephone network network is used more advanced coding techniques, and for example CELP and adaptive multi-rate (AMR) coding is compared with pulse-code modulation, and it can realize higher compression ratio.In many mobile networks, the Code And Decode of voice is finished in portable terminal.If call out is to carry out between two portable terminals registering in same network, just can be from end-to-end transfer encoding speech data.
If calling out is the terminal that mails to the user of " outside " network among mobile networks from the portable terminal of registering, the end-to-end transmission of coded voice data just might be not all right, and concrete condition depends on the external network that the mobile network that starts is coupled together with external network or the actual conditions (also is like this for calling out the situation that connects the externally-originated network) of all go-betweens.
Consider telecommunication system shown in Figure 7, two third generation universal mobile telecommunications system (UMTS) of wherein having drawn network 1 and 2, they are connected to each other by a traditional public switch telephone network/ISDN networks 3.In the network of universal mobile communication system 1 and 2 each all comprises the universal mobile telecommunications system terrestrial radio access network (UTRAN) 4 of network controller (RNC) 5 and base station (BTS) 6.UTRAN 5 is at portable terminal (not drawing) and call out and transmit the compressed voice data between the mobile switching centre (MSC) 7 of connection.
Lets call is derived from a user of one of network of universal mobile communication system 1, is a user of mailing to another one network of universal mobile communication system 2.Utilize corresponding process node 8 to provide connection by public switch telephone network 3 for this calling, one of them node is the gateway mobile switching centre (GMSC) of network of universal mobile communication system 1 and 2.Point out that as top public switch telephone network 3 utilizes pulse code modulation that speech data is encoded.All speech datas by public switch telephone network 3 transmission are that the form that majority of network can be understood is very important.For example, allow public switch telephone network 3 operator notice can be inserted an audio call, realize voice alert service or the like, and allow the operator of public switch telephone network 3 for the security purpose supervising connections for calling, it is necessary doing like this.Therefore data passes is given before the public switch telephone network 3, it is necessary in the gateway mobile switching centre 8 of network of universal mobile communication system 1 and 2 speech data being carried out " code conversion ", just speech data is become the pulse-code modulation form from mobile network's speech coding format conversion.Equally, the pulse-code modulation data received of gateway mobile switching centre 8 must convert suitable mobile network's speech coding form to.
The code conversion meeting consumes general mobile switching centre 8 considerable processing resources, but also can cause tangible voice quality to descend.In order to address this problem at least in part, the voice that no tandem equipment (TFO) can be introduced in the general mobile switching centre 8 connect.The speech data of output is continued to convert to the pulse-code modulation mode, " is not stolen " but the lowest order of each pulse-code modulation sample has the tandem equipment.The peculiar enough bandwidth of the ratio of stealing from channel (8kbps just) are transmitted original coded data.No tandem equipment at the terminating network of universal mobile communication system re-assemblies coded data, is transmitted to relevant UTRAN, abandons the pulse-code modulation data received (know that it is revised by public switch telephone network, for example by adding operator notification) simultaneously.In this way, no tandem work makes public switch telephone network 3 can use the pulse-code modulation data, can carry out end-to-end transmission to coded voice data effectively simultaneously.
If the middle device in public switch telephone network/integrated services digital network changes the pulse-code modulation bit stream, can detect this variation in the no tandem equipment, and " get back to " between no tandem equipment and to transmit the pulse-code modulation encoded voice, that is to say that they no longer transmit compressed speech data.
The audio coder ﹠ decoder (codec) that the mobile network can use depends on which type of network it is, might depend on that also which type of terminal is the terminal of using this network be.Obviously, the end-to-end use of single codec can only be when two networks can both use identical codec.Which type of ability the gateway mobile switching centre of supposing two mobile communications networks has up to the codec of their belonging networks, and they just can be held consultation, and find the codec that can both accept.In ETSI suggestion GSM 08.62 (version 7.0.0 announced in 1998), provided appropriate protocol.
In the sort of mobile network shown in Figure 7, attempt realizing in the no tandem work problem taking place, do not have the edge that the tandem equipment is positioned at the mobile network this time, just be positioned at UTRAN outside (traditional no tandem equipment is positioned at radio access network).For in these networks between the no tandem equipment, the codec of consulting between no tandem equipment and the radio access network comes exchange message without any way at present.
Fig. 8 has drawn one and has improved system architecture, wherein the gateway mobile switching centre of two network of universal mobile communication system combines no tandem equipment 9, and Fig. 9 then illustrates in the corresponding universal mobile telecommunications system mobile telephone network and sets up calling signaling between two nodes.
Call set up signaling in the network of universal mobile communication system is carried out calling out control (for example TICC) layer, and initial address message (IAM) starts call setup by sending first from mobile switching centre to relevant gateway mobile switching centre.This initial address message utilizes general ability (GCN) mechanism of consulting to determine to call out the number of parameters that connects.Particularly, IAM comprises an inventory of the codec that the network of universal mobile communication system that starts is supported, also comprises first-selected codec information.A codec is selected by the gateway mobile switching centre that starts from the codec inventory that sends, and tells mobile switching centre with its selection in message (codec 1 is selected).Then, connect with enough bandwidth at carrying person's layer and support the codec chosen.
In order to carry out end-to-end codec negotiation, suggestion is added GCN in the ISDN User Part to.This end-to-end codec negotiation can make end points use the possibility maximum of identical codec.If end points uses same speech coding algorithm, no tandem work just can not reduce speech quality because of unnecessary code conversion by pulse-code modulation network delivery compressed voice.So just can by make support compressed voice start and terminating network in carrying person's minimum number of needing save transmission (for example AAL2 or IP carrying person are transmitted).
How Fig. 9 explanation utilizes GCN enhancement mode isup message to transmit signaling between two network of universal mobile communication system.In the terminating network of universal mobile communication system, utilize TICC to send an IAM to mobile switching centre from gateway mobile switching centre.Mobile switching centre accepts codec 1 in this case, and reuses TICC and tell gateway mobile switching centre with this point.So, setting up carrying person's layer at the terminating network of universal mobile communication system connects.Public switch telephone network is accepted the gateway mobile switching centre that this situation is told originators with codec.Because the codec of initial suggestion is accepted, connect so there is no need in the network of universal mobile communication system that starts, to change carrying person's layer at all.If but changed codec, just must tell mobile switching centre this situation, thereby can revise the old connection of carrying person from originators gateway mobile switching centre, for example increase the bandwidth that connects.In Fig. 9, ACM finishes message at the address of having drawn, the ANM response message of having drawn.
Figure 10 illustrates second embodiment of the present invention.The optimizer that this scheme depends in optional codec mismatch solution and the no tandem work agreement detects incompatible codec.When no tandem equipment detected incompatible codec, it just triggered a codec update routine and revises the codec that terminal is used.No tandem work provides the rule (just selecting which codec) that solves the codec mismatch problems.No tandem work agreement triggers the TICC signaling subsequently and revises the codec of calling out use, thereby makes the codec compatibility of two terminals.The network of universal mobile communication system that the starts codec of suggestion at first changes and can requirement revise carrying person's layer connection of setting up in two network of universal mobile communication system.
Above-described embodiment can make because the phonetic code conversion that there is no need that middle pulse-code modulation network causes is minimum, makes the optimum allocation of user plane equipment (for example code conversion unit) and/or user-plane resources (for example bandwidth) become possibility with the service layer that supports certain calling in the public telecommunication network simultaneously.
In the existing network of supporting the pulse-code modulation coded speech and new network, need to consult codec so that make the code change that there is no need in the voice path minimum.When universal mobile telecommunications system and global system for mobile communications user's the calling decline that their voice quality can not there is no need when supporting the existing pulse-code modulation core network of no tandem work.When GCN mechanism is introduced the TICC agreement, realize (APM user) with a kind of clearing method probably.
Those of skill in the art can understand and can carry out various modifications and can not depart from scope of the present invention above-described embodiment.

Claims (6)

1. signalling point, be used for telecommunication system in another one signalling point consultation call ability, calling control wherein and carrying person's key-course are by independently agreement control, this signalling point comprises:
The call control department branch, be used on call control layer to terminating signalling point or signaling transfer point transmitting capacity preference or preference priority inventory, with the approval that is used on call control layer, receiving from the ability of terminating signalling point or signaling transfer point, the preference that signalling point sends if terminating signalling point or signaling transfer point acceptance are started is with regard to the approval of transmitting capacity; And
If the selection to the call control layer ability has influence on carrying person's key-course, by notice carrying person key-course, the interface controller that the selection of the ability of described call control layer is made a response.
2. the medium gateway controller of a telecommunication system, calling control wherein and carrying person's key-course are by independently agreement control, and this medium gateway controller comprises:
The call control department branch is used for from a reciprocity medium gateway controller receiving ability preference or preference priority inventory, and wherein said ability preference or preference priority inventory are relevant with the connection that will set up on telecommunication system;
Controller, be used for and the related medium gateway of medium gateway controller communicate, with the validity of the preference determining to be received at the medium gateway; And
Described call control department branch is configured to according in the determined validity of medium gateway ability preference approval message be returned described reciprocity medium gateway controller.
3. the medium gateway of a telecommunication system, calling control wherein and carrying person's key-course are by independently agreement control, and this gateway comprises:
Carrying person's control section, be used for from medium gateway controller receiving ability preference or preference priority inventory, wherein said ability preference or preference priority inventory are relevant with the connection that will set up on telecommunication system, and are used for selecting preference according to the validity of the preference on the medium gateway; With
Interface controller is used to send selected preference to described medium gateway controller.
One kind operate signalling point be used for telecommunication system in the method for another one signalling point consultation call ability, calling control wherein and carrying person's key-course are by independently agreement control, this method comprises the following steps:
On call control layer to terminating signalling point or signaling transfer point transmitting capacity preference or preference priority inventory,
Receive the approval from the ability of terminating signalling point or signaling transfer point on call control layer, the preference that signalling point sends if terminating signalling point or signaling transfer point acceptance are started is with regard to the approval of transmitting capacity; With
If the selection to the call control layer ability has influence on carrying person's key-course,, the selection of the ability of described call control layer is made a response by notice carrying person key-course.
5. the method for the medium gateway controller of an operating telecommunication system, calling control wherein and carrying person's key-course are by independently agreement control, and this method comprises the following steps:
From a reciprocity medium gateway controller receiving ability preference or preference priority inventory, wherein said ability preference or preference priority inventory are relevant with the connection that will set up on telecommunication system;
With communicate with the related medium gateway of medium gateway controller, with the validity of the preference determining on the medium gateway, to be received; And
According in the determined validity of medium gateway, ability preference approval message is returned described reciprocity medium gateway controller.
6. the method for the medium gateway of an operating telecommunication system, calling control wherein and carrying person's key-course are by independently agreement control, and this method comprises the following steps:
From medium gateway controller receiving ability preference or preference priority inventory, wherein said ability preference or preference priority inventory are relevant with the connection that will set up on telecommunication system,
Validity according to the preference on the medium gateway is selected preference; And
Send selected preference to described medium gateway controller.
CN2010101570358A 1999-05-17 2000-05-09 Capability negotiation system, apparatus and method in a telecommunications network Expired - Lifetime CN101917745B (en)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
GB9911441A GB2350257A (en) 1999-05-17 1999-05-17 Capability negotiation in a telecommunications network
GB9911441.5 1999-05-17
GB9914654A GB2351414A (en) 1999-06-22 1999-06-22 Call set-up in a telecommunications network
GB9914654.0 1999-06-22
GB9914700.1 1999-06-23
GB9914700A GB2351416B (en) 1999-06-23 1999-06-23 Negotiating telecommunications protocol options
GB9915366.0 1999-07-02
GB9915366A GB2352127A (en) 1999-07-02 1999-07-02 Speech coding in a telecommunication system
GB9921647.5 1999-09-15
GB9921647A GB2350261A (en) 1999-05-17 1999-09-15 Capability negotiation in a telecommunications network

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