CN1287738A - Service capable network - Google Patents

Abstract

A service capable telecommunications network is described. The network permits a communications network user, user agent or another network simplified access (to/from user or adjacent network) to network communication services (14). The network is based on a clear separation of transported payload information, network-based communications enhancing and enabling services, and physical network transport. The functions, functional layers (18, 20) and coupling of both functions and functional layers enable a simplified choice of and access to communication services to best meet user requirements. The network also simplifies design and construction of network components, simplifies scaling of the network for numbers of users served and types of information carried and allows flexible placement of functions in the physical network components.

Description

Service capable network

Technical field

The present invention relates to communication network, particularly a kind of novel high-performance service network, it is designed to the communication service demand that satisfies modern day user, and makes communication service have the chance of expansion.

Background of invention

Communication network uses a model in history always and agreement is built as instructing.Along with the introducing of new network, perhaps legacy network develops for the demand that adapts to new terminal use, equipment and application (application), and network model and agreement are increased sharply in the past few years.The surge of network model is verified in integrated network of the height of monolithic and networking component structure.Function and product for the target complex of terminal use, equipment or application is developed under the situation of not carrying out many-sided transformation or rebuilding fully, almost all are difficult for to another extension of network without exception.New network can not be utilized as former network and function and the agreement developed, because the integrated design of monolithic can not move grows.Existing network provides limited services selection, and available selection often is difficult to obtain.For existing network increases function, need carry out complicated improvement to existing function.Do these and improve the required time, incompatible with the emulative business environment of communicating by letter of modern times, in this environment, the speed of market development greatly affects total income.

With the telephone service of building a whole world is the modern voice communication network of core, grows up at twentieth century.Now, the revolution of communication is carried out, and the multimedia application service that provides to exist everywhere is provided for it, and modern network need have the network configuration of interaction capabilities, needs data network as the past computer.What extensively admitted is that Networking Solutions ﹠ provisioned need be considered edge device and the content service that function existing at present or that developing constantly strengthens.

People have recognized this needs, and be devoted to the planned network structure, purpose provides the multimedia service that exists everywhere, and for example, communication information network configuration association (TINA-C) formulated the file of ' service system 5.0 versions ' by name on June 16th, 1997.This TINA-C structure is from a guideline, and this guideline is from the analysis to market, industry and megatrend.The crucial trend of analyzing in structural design comprises: to the network configuration layering, the application and service logic is moved on to outside the transmission node, telecommunication technology is positioned higher levels of entity; In the environment of a plurality of participants, how tame provider, provide telecommunication service; And the user of communication service selects.This TINA-C structure is considered as three macroscopic view layers to network, wherein sets an intermediate distribution process environment, and uses distributed treatment (ODP) environment that is similar to the opening of objective management group (OMG) definition.By transmission unit is carried out abstract description with being connected, this TINA-C structure is set forth transmission unit and is connected with technological standpoint independently.It also comprises the notion of communication agent, is used for making communication service and user's request in intermediate layer and the transport layer to be complementary.Communication can be carried out between network similar, xenogenesis, and as the part of resource partitioning layer, changes at network edge.Be called as this adaptive conversion and be one and can can't help the automated procedure that the user selects.

Multimedia communication Tribune, nineteen ninety-five has proposed another network configuration in the paper of a piece " reference configuration modelling technique standard " by name.The purpose of this article is for distributing the required integrated service of multimedia application that a framework is provided.Its core is about the structural model aspect, and this structural model supports multimedia communication to use, as multimedia conferencing and MMS (Multimedia Message Service).Basic technology is not main core, and this MMCF structural framing comprises many domain logics, and they provide a series of service and function corresponding.This is divided in and solves complicated communication issue between the Distributed Application process.Each territory is to be undertaken by an open interface that is called as application programming interfaces (API) by the function of other field visit (access).This open interface the shielding of each territory outside the characteristic of the function in other territories and service.Therefore, the technical specification in territory can be according to developing technology upgrading, and does not directly have influence on the technical specification in other territories.In this model, there is manager's entity, relevant with application, middleware, media apparatus and domain transmission, manage the information flow that sends/receive and be assigned to the terminal use by network.

This MMCF reference configuration model comprises user's presentation layer, an application domain layer, a middleware domain layer, and a low layer that is divided into media apparatus territory part and domain transmission part.Provide application programming interfaces to carry out communication between the layer between every layer in four layers.Communication with progressively downwards, the mode that progressively makes progress handles, wherein direct communication can only occur between adjacent layer.Therefore, no matter how simple user's request is, user's application will be crossed over relevant layer and be begun a communication session (session).This has caused the complicated of network configuration and has increased cost, reduced efficient.

Therefore the service capable network that needs a kind of layering, can insert (access) corresponding layer from the edge of network or from adjacent layer, to guarantee the satisfying communication requirement of different user colony and to allow the effectively required flexibility of interworking between homogeneous networks.Also there is a kind of demand in network to layering, and promptly layer wherein can be used as self independent entity and is used, and is had by different commercial entity.

Purpose of the present invention

The purpose of this invention is to provide a service capable network based on the hierarchical network model, in the hierarchical network model, each functional layer by Chu Xi ground separately.

Further purpose of the present invention provides a service capable network model, wherein act on behalf of that representative of consumer is used or adjacent networks is sought acceptable service as required.

Further purpose of the present invention provides a service capable network, wherein reacts the primitive of the communication requirement that repeats of nature, is used to provide simple network interface, develops the providing capability of network.

Further purpose of the present invention provides a service capable network, and wherein network function is divided into the function irrelevant with transmission path, the function relevant with transmission path and (the in direct line of path) function in the direct line in path.

Further purpose of the present invention provides a service capable network, wherein the expression of content adaptation transform coding content format and transmit two aspects or wherein in a certain respect, do not need its implication of detail knowledge.

Further purpose of the present invention provides a service capable network, wherein, and when entering or during deviated from network, transfer (conditioning) is provided at the two-way changing between the expression.

Further purpose of the present invention provides a service capable network, wherein acts on behalf of by primitive and obtains user's service and the policy information of communicate by letter, and be that ISP of communication session selection is individual with these information.

Further purpose of the present invention provides a service capable network, wherein acts on behalf of the client, by content and link information create primitive, increases adjusting, to use the agency.

Further purpose of the present invention provides a service capable network, and wherein the agency can be the coupling agency or consult the agency.

Further purpose of the present invention provides a service capable network, and wherein directory service allows user and device to follow the trail of to user that move, interim and that fix service is provided.Summary of the invention

The invention provides a high performance service communication network 10, provide communication between information source and receiver, this network comprises first logical layer 14 and second logical layer 16 that nodal function is provided that network function is provided, and its characteristics are:

First logical network network layer 14 is divided into the service 18 of multinode, this service can or be used the adjacent access to netwoks of first group of primitive 22 by user 54, user agent 56, this primitive allows with first logical network layer function mutual, with beginning and the service of control multinode;

Second logical layer 16 is divided into node service 20, this service can or use the adjacent networks of second group of primitive 24 to visit by user, user agent, first logical network layer multinode service, this primitive allows the function reciprocation in second logical layer, with beginning and control communication path, and support transfer function; And first and second logical layer have the layer structure of a recurrence.

First and second logical layer according to service capable network of the present invention (SCN) are hereinafter referred to as " enhancement service layer " and " preliminary service layer ".This enhancing and preliminary service layer have recurrence layer structure.As employed " network layer structure of recurrence " in this article, the meaning is that the function between logical layer is duplicated in the real network, and this duplicates and is limited in the scope, needs to be suitable for the difference in functionality in the corresponding network layer in this scope.The function of this SCN further is divided into and the irrelevant function of transmission path; The function relevant with transmission path; With the function in the direct line in path.Communication service is divided into the various functions relevant with the path, has enlarged flexibility and can adapt to the proprietorial diversity of network layer.Function further is divided into relevant two classifications relevant with non-edge in edge.Successful division allows independently professionally to develop and operate around function aspects, if desired.

The present invention also further provides a kind of and provide service method in the communication network of a layering, and this network has first logical layer (14) and second logical layer (16) that nodal function is provided that network function is provided, and its characteristics are:

In first logical layer 14, provide with the function 26 of path independence and with the path relevant function 28, comprise navigation and ability interoperability of high-level network edge with the function 26 of path independence, this function is by implementing service and the abstract method of network, and the function 28 relevant with the path comprises that the use path-level is abstract and finish end-to-end communication service; And

Provide nodal function in second logical layer 16, this function comprises path control and node support function, and it allows terminal use, user agent, adjacent network and serves 18, use node communication path in first logical layer 14.

For simplify and the function of two service layers between interactivity, the user uses or adjacent network can use the agency to isolate the service of listing to provide, this service provides the communication requirement that can satisfy them.After a communication session was set up, the agency finished the each several part of an electronic contract, and this contract preferably offers the user by user oriented ISP and uses.The dialogue of this electronic contract supervisory communications, and ensure to the ISP (include lotus transmission and other the relevant services loaded with, as regulating or effectively load with the conversion of data, the ISP) with repayment.

This SCN also supports that move, interim and fixing user and device by using directory service, and the file of directory service storage user and device allows user or device in the network to be positioned.

Brief description of the drawings

Now, explain the present invention by way of example, and with reference to following accompanying drawing, wherein:

Fig. 1 is the schematic diagram that is divided into the high performance service communication network of each layer according to the present invention;

Fig. 2 be one show how communication service further is divided into the service of enhancement service and primary communication and and intercommunication primitive make the schematic diagram of information exchange between corresponding layer;

Fig. 3 is a schematic diagram that function is divided in strengthening communications service layer and primary communication layer, shows function and how further to be divided into and the function of path independence, function and the function in path direct line relevant with the path;

Fig. 4 represents the communications service layer structure of enhancement service sublayer and preliminary service sublayer;

Fig. 5 a is the embodiment table that the function division of enhancement service sublayer is shown;

Fig. 5 b is the embodiment table that the function division of preliminary service sublayer is shown;

Fig. 6 is the schematic diagram of explanation communication service interlayer interface structure;

Fig. 7 is the exemplary schematic diagram of the intercommunication primitive that uses in service capable network;

Fig. 8 shows the schematic diagram that uses intercommunication primitive in the service capable network;

Fig. 9 is to use the schematic diagram of the layer interface structure in service capable network;

Figure 10 is the exemplary functional schematic of a coupling agency in service capable network;

Figure 11 is in service capable network, a negotiation property agency's exemplary functional schematic;

Figure 12 is a schematic diagram of setting up the process of an electronic contract in service capable network;

Figure 13 illustrates inhomogeneous dialogue in the service capable network;

Figure 14 illustrates the multi-form of the communication session used in the service capable network;

Figure 15 is the master pattern of act of agency in the service capable network;

Figure 16 is an example that is used for the user folder and the device file of route in the service capable network;

Figure 17 is the schematic diagram that catalogue is used and file uses in the service capable network;

Figure 18 is the schematic diagram of network topology that is used for illustrating the calling procedure of service capable network;

Figure 19 a-19f is the procedure chart of calling out, and is used for illustrating an exemplary calling procedure of communication session in service capable network;

Figure 20 is a connection example table that shows the calling procedure that has illustrated in Figure 19 a-19f.

The detailed description of most preferred embodiment

The invention provides one based on the network model of layering and the service capable network of principle (SCN), clear and definite division is arranged between the functional layer in this network.Fig. 1 explanation is the functional stratification among the SCN10 according to the present invention, and the layer of SCN comprises:

The user's application function that is called content layer 12, it produces the Payload information of Network Transmission;

A communications service layer 14 that provides by this network; With

It is made up of physical transport layer 16 transmission node hardware and interconnecting link such as optical fiber link, is used for transmitting the Payload that content layer 12 produces.

Include content layer 12 although this SCN10 is schematically illustrated as, service layer 14 and physical transport layer 16 The present invention be more particularly directed to the interface between this service layer 14 and service layer and application layer.

Fig. 2 shows the division of communications service layer 14, and it is divided into enhancing communication service 18 and primary communication service 20.Strengthen communication service 18 and finish the communication increment by SCN 10.Primary communication is served the physical transfer of the Payload of 20 control content layers, 12 generation.Enhancing and primary communication service layer can be by being called as the interface message scheme accessed (access) that strengthens intercommunication primitive 22 and primary communication primitive 24.This enhancing communications service layer 18 is the main core of SCN10 of the present invention with primary communication service layer 20 with relevant primitive together.The division of function

In SCN 10, in order to enlarge flexibility, communication service 14 further is divided into various functions.The function that Fig. 3 explanation is relevant with the path is divided.In order to concentrate the service logic of common network scope to greatest extent, and consider the influence of restriction to upgrading service, development and convenience, be necessary network function is divided into and the irrelevant function 26 of transmission path, with the function 30 in the direct line of transmission path correlation function 28 and path.In addition, some controlled function needn't depend on some special path technique, and can irrespectively distribute with node and path element.Recognize the different ownership that adapt to issuable network layer, this division must be carried out.

By this way the function of Hua Fening also can divide into groups or be categorized as relevant with the edge and with two irrelevant classifications of edge.This classification is a kind of function in the network, rather than a kind of location in network.

Successful division allows independently professional around functional character development and running.Therefore, must consider ownership during division.Network function preferably is divided into the functional layer group, and they can be had respectively, manage and operate.Communications service layer

Communication service is an essence of the present invention, and negotiation, navigation, coordination, interoperability and the resource bundle of network range are provided for service.Fig. 4 has illustrated the composition of this one deck.This layer comprises and strengthens communication service 18 sublayers and primary communication is served 20 sublayers.The enhancement service sublayer

Enhanced service provides network function.This sublayer is divided into following a few part: Transformation Service 32, Service Management 34, directory service 36, Control on Communication 38 and agency service 40.Enhanced service is relevant with the multinode aspect of communication.Each part in the funtion part 32～40 can further be divided into the function of path independence and with the path relevant function.The function of path independence comprises the network edge that compiles, navigation and ability interoperability, and these abilities are by service and the abstract method realization of network.Allow service to use that path-level is abstract finishes end-to-end communicating by letter with per-path functionality.Transformation Service 32 and agency service 40 are illustrated in the function of edge center classification, and other funtion part such as Service Management 34, directory service 36 and Control on Communication 38 are non-edge center.

Exemplary as follows with function path independence in each part: Transformation Service 32 comprises that necessary content format transforms, so that different user and different user agency can interoperability.Service Management 34 provide user, device, application identification and with the getting in touch of the service of their agreements.Basic transmission or more complicated predefined special service can be called for individual consumer or group user.An example of group user service is VPN (virtual private network) VPN.Directory service 36 needs the automatic compiling of name, addressing, location and the route topological information of network range, also needs to provide transfer algorithm translating between the expression that different sub-network uses.Control on Communication 38 except for appointing the configuration of calling to provide life cycle and the service control, also provides predefined communicate configuration, as those multicastings or the required configuration of VPN.Support connection-oriented and connectionless communication information and dialogue mode.Agency service 40 makes the terminal use can select service in enhanced service sublayer 18.

It is as follows to divide exemplary per-path functionality at each: Transformation Service 32 comprises that the edge, path regulates and act on behalf of the client.The adjusting of edge, path comprises that control is adaptive, message produces, makes external system and the required message translation of enhancement service layer 18 interworking.Act on behalf of client adaptive nonuniformity conventional external system such as PSTN POTS, make them can utilize the performance of enhancement service layer 18.Service Management 34 comprises service configuration, account number and tactical management.Network management is another kind of service, though be the service of a special permission, it comes down to by contract automatically to carry out, and is just As described in detail below.Directory service 36 comprises Route Selection and the interactivity of equipment and service in communication path is decomposed.Control on Communication 38 provides path dialogue behavioral mechanism.Agency service 40 can select to have the selection of the end-to-end communication path of suitable service quality, and strengthens the sublayer offering after the details of the treaty assembling.Fig. 5 a has provided the exemplary functionality in each part of enhancement service layer 18.The preliminary service sublayer

Preliminary service sublayer 20 provides nodal function, allows terminal use, user agent, adjacent networks and enhancement service layer 18, uses the node communication path.Preliminary service comprises path control and node support function.As shown in Figure 4, function is divided into following classification: Transformation Service 42, management service 44, transmission service 46, Connection Service 48, QoS service 50 and agency service 52.

Exemplary Node Controller based on function in each classification is as follows: Transformation Service 42 comprises the form and the protocol conversion of path-level, and primary layer as mentioned below is acted on behalf of the client.Management service 44 comprises to be provided, policy definition, maintenance, safety and charging.Transmission service 46 comprise call with control bandwidth share, bandwidth, division, handover and concentrate.Connection Service 48 comprises node session and message management and uses QoS service 50 to select local port and route.QOS service 50 needs tactical management and safety management and binding resource to satisfy qos requirement.It is abstract that the general QoS of a cover is carried out in QoS service 50, allow terminal use, user agent, enhancement service 18 or adjacent network by a series of different transmission technologys, begin, safeguard and stop communication path, agency service 52 comprises selects primary resources to satisfy QoS and policy goals, and is preliminary service sublayer 20 assembling electronic contract details.

Physical function exemplary in the node is as follows: Transformation Service 42 comprises regulatory function such as bit stream form and flow process control.Management service 44 comprises that hardware element activates.Transmission service 46 comprises port termination, exchange and bit carrying.Connection Service 48 comprises encrypted physical.QoS service 50 needs path monitoring and uses control.Fig. 5 b has illustrated the division of exemplary function in primary communication service layer 20.

Have only this preliminary service layer 20 to comprise real function in the direct line in path, therefore bundle or be based upon in the network node.All other function all is preferably on the association service device in enhancement service layer 18 and the preliminary service layer 20 and implements.Server is divided the ownership standard that depends mainly on.

Terminal use, application and the agency of user software, and adjacent network can insert individually among (access) this SCN 10 enhancement service layer 18 or preliminary service layer 20 each.The network of adjacency inserts these identical layers of departure with the relation of equity in a layer.Terminal use, application or user agent to be also can inserting these layers in top-down storehouse mode, and enhancement service layer 18 as the gateway that arrives preliminary service layer 20.In fact, the service in enhancement service layer 18 can produce primary communication primitive 22, and the terminal use needn't be directly acquainted with their foundation, and serves as enhancement service layer 18 representative of consumer.

Fig. 6 has illustrated relation between enhancement service layer 18 and the preliminary service layer 20 and their interface and has been divided into the relation that edge built-in function relevant and the irrelevant service in edge is divided.The layer interface structure will be called in the back in the part of " interlayer interface structure " and further discuss.Intercommunication primitive

The user uses, and uses to strengthen intercommunication primitive 22 Fig. 2 interaction in content layer 12 and enhancement service layer 18.Strengthening communications service layer 18 and primary communication service layer uses primary communication primitive 24 to interact.Fig. 6 shows intercommunication primitive 22,24 and how to pass a layer border and communicate so that and layer limbic function and and limbic function between layer in interact.Fig. 7 has showed the example of enhancement mode and primary communication primitive 22,24.Example shown in Figure 7 is exemplary rather than detailed.

Strengthening intercommunication primitive 22 is that some are abstract, and it allows the network of user, user agent or adjacency and this SCN 10 to interact, for many different contents begin, safeguard and the communication service that terminates.Strengthen intercommunication primitive 22 and comprise the elementary instruction that sends to network, and the subsequent response of returning by network, so that can talk with the enhancement service layer function.Basic communication behavior formulated in this primitive, can obtain more complicated service thus.

Primary communication primitive 24 is similar abstract, and it allows preliminary service layer 20 interaction of network with the network of the function of user, user agent, enhancing communications service layer 18 or adjacency.The primary communication service conversely, is carried out general purpose grade or service quality primitive, by any different transmission technology, allows the network service to begin, keep and the communication path that terminates.The network service is not aware of transmission technology.

The grammer that intercommunication primitive 22,24 uses the user generally can discern.Primitive has comprised user network control information exchange semantics, comprises a user and supplier's policy information, and the b communication service is selected, and the c content adaptation is selected and d service quality is selected.Different primitive message is used in strengthening communications service layer 18 and primary communication service layer 20, also uses between the difference in functionality of layer 18 and 20.

Intercommunication primitive is necessary simply, use is easy, and will concisely and will limit to a number or amount to a great extent.Their form does not resemble the software language instruction, primitive comprises " instruction code " part, they and then are one or a string parameter, need use simple, easy, because will be used by the different user group of software application and graphical user interface (GUI) designer.And they will realize inquiring and answering of basic voice communication service that SCN 10 provides, can be used for constituting more complicated communications applications by terminal use or third party ISP.Because the connection between network layer must be designed to revisable with separating layer ownership.This primitive 22,24 must be implemented easily, and open to different aspects.Fig. 8 terminal use 54, user agent 56 are described and use 58 how can with one act on behalf of client 60 and carry out interface, acting on behalf of the client may directly reside in the end user terminal, or, may reside in a network entity, and as an agency " harbour " in the situation that can select user agent 56.Primitive 22,24 is explained by acting on behalf of client 60.Conversely, act on behalf of client 60, do not express interaction with the acting server that resides on the webserver.The terminal of SCN 10 compatibilities can directly be held the agency.The layer interface structure

Transformation Service 32,42 and agency service 40,52 provide to enter or to leave the network edge function that strengthens communications service layer 18 and primary communication service layer 20.Agency service allows this SCN 10 to provide services selection in each network layer enhancing and preliminary service layer.And this SCN 10 is designed to be supported in each layer, concerns at the ad eundem between the ISP and between the technology.Because each layer all is relatively independently.As can being had, be managed and be runed respectively, provide at network edge and to select and simple interface, similar structure is used as agency service 40,52 and Transformation Service 32,42 in each layer, regulate qualification, adaptive and act on behalf of the client.Strengthen communications service layer 18 and primary communication service layer 20, therefore, comprise the macrostructure of identical recurrence in fact.And then in each layer, some function element of this structure can be built to identical.But, be used in particular algorithm in the individual layers and/or data with difference, because every layer of service that provides depends on the physical structure of supporting equivalent layer.Fig. 9 has illustrated the structure of layer interface.Fig. 6 content layer user, user agent, adjacent layer and how to interact with enhancing and primary layer in abutting connection with network use this structure.Transformation Service

Transformation Service comprises content adaptation 62, acts on behalf of client 64 and regulates 66.

Content adaptation 62 can be used primitive 22,24 to provide or apply for.Content adaptation is changed both or one of them of the expression aspect of encoded content form and transmission aspect, and does not need its implication of detail knowledge.The purpose of this function provides a kind of network service, and it allows different user's sets, user agent or uses interworking.Content adaptation 62 comprises the bi-directional conversion of message transmission between two sides.Content adaptation 62 is different with application gateway, and content must be translated so that allow different entities interworking in the application gateway.

Act on behalf of client 64 by set up primitive 22,24 by content and link information, increase and regulate 66, to allow to use agency service 40,52.When using agency service 40,52, this SCN 10 is designed to have top performance price ratio, what running was efficient and the user responds.Acting on behalf of client 64 provides and makes traditional application, device and network be suitable for method with SCN 10 running.Acting on behalf of client 64 is special application examples, and wherein content is detected to obtain intercommunication primitive 40,52.

When entering or leave this SCN 10, regulate 66 bi-directional conversion that provide between the expression.Adjusting 66 is separate content information clearly, and they may will pass network pellucidly.Regulate and also comprise signal and transport protocol conversion and information flow formal transformation.Regulatory function can find in each enhancing and primary layer.Condition restriction itself does not need to use the agency.Agency service

The agency obtains user's service and policy information, communicates by primitive 22,24, and seeks coupling according to ISP's service and strategy.If find a coupling, then act on behalf of their searching and fill in a contract in the scope in detail, continue the initiation communication service then.According to their scope, the agency can directly be mated the service, resource and the strategy execution that provide, perhaps holds consultation to obtain an optional contract option based on customer requirements.The interface function example

Use the example of interface structure to list in table 1 and table 2.

Table 1 Transformation Service for example

Adaptive	Strengthen	G.711	Go/come	G.723
	Elementary	PCM	Go/come	IP
	Act on behalf of the client	Strengthen	The PSTN speech	Go/come	The IP speech
Elementary		PCM	Go/come	IP
Adjusting-signal		Strengthen	ISUP	Go/come	BISUP
Transmission	Elementary	TDM	Go/come	ATM

Table 2 agency service for example

Network layer	Agent Type	Service component	The strategy composition	Translation
						Come	Go
				Strengthen	Service	VPN	Price	Enhancement layer atom language	Enhancement service
Elementary	Resource	QoS	Price	Primary layer primitive	Preliminary service

Agency's type

Figure 10 illustrates a coupling agency's 68 method of operation.Coupling agency 68 can be constructed to or mate for the primitive 22,24 of each submission returns single node argument ISP, perhaps, selectively, for user or user use further screening and select this coupling agency can return with a scope in providing of being complementary of argument, these arguments define in primitive 22,24.Do not hold consultation with providing of just returning of network.

Figure 11 illustrates a method of operation of consulting the agency, and it is also referred to as " interests agency " 70.Consulting agency's 70 primitive 22,24 that can be configured to for each submission for one, is the coupling in the argument scope, holds consultation.Potentially, will allow compromise knowledge, and make and consulting and their consequent according between the scope of the primitive argument of submitting to some.That allows is compromise, can use the submission network by terminal use or user, as the producible compromise interests primitive argument of definition.

These the two kinds differences of agency between 68,70 can be expressed as follows: a coupling agency 68 seeks " only " according to rule fixing or that determine, and one consulted agency 70 according to finding, uncertain external environment condition determine one only.Coupling agency 68 and negotiation agency 70 are interactively with terminal use, application or user agent.

Another more intelligent agency classification is to differentiate the agency not in diagram.The resolution agency is suitable for being identified in priority and the whole ownership goal that indivedual terminal uses are gone up in communication, and or best the providing of a possibility is provided out in a series of abilities that provide, perhaps determine a peer-to-peer services and the assembling that is connected that possibility is best.Both provide more ability and value to this resolution agency for coupling or negotiation functionality.

This coupling agency's 68 as indicated above main function is to accept the input such as the intercommunication primitive of user's service request, is directly sent or is found a coupling through an application or user agent and by searching the Service Properties that the ISP lists by the user.The scope of searching searches that algorithm and result filter by user and supplier's the common decision of strategy.Act on behalf of 68,70 then and can respond the user in many ways.Coupling agency 68 algorithm is preferably implemented by one of following approach.● this coupling agency 68 can return supplier's tabulation, and this supplier has with the user to be asked

Refinement is providing of coupling really.The responsibility that is the user is then selected one by the attribute that provides

(may pass through index number) is provided, makes network go out to send to set up a service conversation thus.● the tabulation that provides of asking approximate match with the user, the user's can be provided this coupling agency 68

Responsibility is to select a supplier from the tabulation of approaching coupling.● this coupling agency 68 can return the result of " not finding coupling ", and the meaning is not have

An enough approaching coupling can be considered an optional object.

Some attributes of the primitive argument of composition in service request are the ability of user's needs or the strategy that the user wishes.Conversely, the ability and the strategy of these services that will provide with the ISP are complementary.Notice that a complete set of ability and strategy allow the ISP that difference is arranged in many aspects.

If the agency fails to find a coupling, then service does not start.Figure 12 has listed service and policy elements and how has been used for obtaining a suitable service agreement in that strengthen and elementary communications service layer by the agency.

Provide selection in case make, agency 68,70 gives dialogue control control and is used for setting up dialogue and monitors.The failure of a dialogue, no matter what reason, the recovery of inner dialogue is impossible therefrom, perhaps outside the clause of contract, can trigger one and turn back to agency 68,70, therefore can use another service to provide.

The agency only becomes at the service establishment stage or with a user or user agent's negotiation again and occurs (and activation) in case of necessity.In addition, after dialogue was opened beginning and service monitoring and is given to service session control, agency 68,70 was in disconnection or inactive state.If serv-fail, the destroyed or middle dialogue change of client requests of contract, the agency can be aroused as described above.Electronic contract

Owing in communication service, having different providing, user to begin the requirement service level agreement and can dynamically consulting with performance-relevant paying.Present network does not provide the dynamic subscriber's network contract based on the optimization and automatic selection of communication service.Agency 68,70 in SCN10 selects to meet the communication service of terminal use or user agent's demand, and obtains the service agreement of " electronic contract " 72 (Figure 12) mode.This SCN10 also uses electronic contract that network is provided and safeguards automation.

The each several part of electronic contract is to finish by the single agency 68,70 who is stored in enhancing and primary communication service layer 18,20.Strengthen with primary communication service layer in, electronic contract 72 can be shared in the network element of equality, obtains to cross over a plurality of network providers' service performance end to end.Complete electronic contract 72 comprises all service items and policy protocol.

Electronic contract 72 is represented a terminal point, at this all to give the correlative detail of user service and resource known, therefore, be included in the network other and put unavailable important relation information.Figure 12 illustrates that how agency 68,70 generates service and policy protocol details the each several part of whole electronic contract 72.

Offering user's electronic contract 72 by service-oriented supplier's client, is in the end-to-end transfer of service or set of service, in the result of a series of sub-contracts of each Provider Interface.Electronic contract 72 can be that fix or dynamic (as negotiable).Each sub-contract service supplier preserves a his that part of contract, and the contract that portion duplicates is sent to client towards the supplier, so that be included in the contract of composition.

The details of electronic contract is a data object.User towards the supplier is responsible for preserving a data object, the whole service contract that its representative and user sign.The set of intercommunication primitive 18,20 allows user's request, confirms or obtain the state of contract.Further, this ISP can notify the modification in user's contract.These operations provide the basis of an intercommunication primitive subclass relevant especially with electronic contract (72).

Use open distributed treatment technology, user oriented ISP can obtain all sub-contract parts about an electronic contract 72, is used for being organized in the contract target of an integral body.The open distribution process of OMG CORBA provides the ability of a this feature.Identical distribution process model can be applied to agent functionality itself, and making agency 68,70 obtain service provides.

Terminal use's dispatch list is by the data that are included in the combination contract, and the service recorder that is produced, safeguarded by Service Management by service session control generates.The independent subdivision of electronic contract 72, it is relevant with sub-contract service supplier, forms the basis of solution between the supplier.The third party also can use whole contract object, and purpose is the hard copy (as the service of chargeing is provided) that produces dispatch list.Communication session control

Before describing dialogue control, provide the general introduction of a dialogue earlier.As everyone knows, a dialogue can be used for: ● the end-to-end communication between leading subscriber (as video conference call) ● the logical resource that management of dialogs is relevant, for example need to be used for to charge and the different topological diagrams (as multicasting) that are connected ● manage other and must join resource (as translating) in the network ● manage one " calling " required different physical resource (as ATM, IP, wireless) ● the physical resource (as ATM) of a special transmission of management

The dialog model that SCN (10) uses comprises each of these uses.

Several dissimilar dialogues are arranged, and every kind of dialogue has different abilities, the different layer of every kind of dialogue in network, and it is extremely important to understand this point.If the management of communication service will be divided into manageable unit, then must safeguard the division clearly of these dialogues.

There are many different types of dialogues and dialogue management person to be included among this SCN10.But, the perhaps any dialogue in the application layer 12 (as Fig. 1) or the manager of dialogue in this SCN10 ignores and resides in.Figure 13 is the sketch plan of the different types of dialogue in this SCN10.Enhancement service layer 18 comprises two " logic " dialogue, i.e. one " service session " and one " being connected dialogue ".Preliminary service layer 20 comprises one and connects dialogue 78, in turn, monitors the local network dialogue, and this dialogue belongs to the single ISP that an end to end communication path is provided.In this SCN10, enhancement layer service session 74 is the owners on supervising the network basis, and it produces and connects dialogue 76, in turn, connects dialogue 78.

This SCN10 also provides connection-oriented and connectionless communication service.Connection-oriented service, with those service class that provide at Time Division Multiplexing telephone network and ATM(Asynchronous Transfer Mode) network at present seemingly.Connectionless service is applied in the system based on message at present, and as the network of internet protocol-based (IP), it uses User Datagram Protoco (UDP) (UDP).This SCN10 comprises the notion of " minimum dialogue ", and it is to communicating by letter service and charging that supervision is relevant based on UDP/IP and TCP/IP.Figure 14 provides and has been used for the sketch plan that two kinds of forms herein of SCN10 connect dialogue.Selection between the connectionless dialog model of the connection-oriented and lightweight of operating weight level, by the argument of primitive 22,24 (as, QoS, expense and network availability) decision.

If use multiple spot to connect dialogue 78, then connecting dialogue 76 is the basis of connection management in enhancement service layer 18, for this SCN10 sufficiently supports service, this service needs to participate in many ways, in an application request each exchanges data flow in many ways, be connected with the individual channel of a point-to-point and compare, more common is that network must support one to connect topology.Term " dialogue " therefore is used for representing one " n road multichannel articulation set ".Recognize that this point is very important, the individual channel that does not resemble point-to-point connects, and definition dialogue in such a way is so that independent dialogue can be the example in any one different connection is arranged.So allow in a dialogue, to arrange any amount of participant, and each can be in any amount of independent data flow, go or from their terminal.In addition, and do not require each participant with identical data flow, spread out of or receive in their terminal.For example, in the calling of sound and combination image, some participants may not have the ability of transmission image, and therefore, they only add at the phonological component of this calling.Therefore, the dialogue in this SCN10 is the Anknupfungskeregriff of a broad sense, can represent a connection topology of not limitting kind.

In each case, dialogue is used to use with one or more terminal uses and is connected, in this terminal that is applied in the terminal use or the network components, or among both, operation.Viewpoint in view of the above, service and resource that service session 74 management are provided by network.One of this service is a communication path.Connect dialogue 76 these paths of management, and used or other enhancement service layer function use, satisfy the demand of their connection managements by the terminal use.Service session 74 is talked with 76 both common logics of controlling in the Connection Service device that resides in SCN10 with being connected.

After the selection that service provides was made, agency 68,70 transferred control to dialogue and controls engage in the dialogue foundation and supervision.The failure of a dialogue, no matter any reason, irrecoverable maybe should the recovery of inner thus dialogue can be triggered one as described above and turn back to the agency outside contract terms, therefore can use another service to provide.Figure 15 explanation is talked with behavior model by the public agency of 68,70 supposition of the agency among all SCN10.

An exception of a public agent operation model described here can be found in the low-level sources agency of preliminary service/transport layer.These agencies are not to find the sort of agency that the demand that satisfies the user is provided.But these agencies obtain distributed resources provides transmission, and is sightless for the user.In this application, they are not described.Directory service and file

By using aspect (or user) file 80 and device file folder 82 as shown in Figure 16, terminal and user allow to move in SCN10.These files the 80, the 82nd, identification user and equipment, and their characteristic or the S/W data object of attribute are described.

Two folders the 80, the 82nd of setting a file interconnect.A user can have several communication equipments.Relevant device type and number of devices are listed in a user folder 80, and as the pointer that points to family device file folder 82.In turn, device file folder 82 has ownership property, the user of the equipment that this Attribute Recognition has, and an equipment can have a more than owner.This attribute is as a return pointer that turns back to user folder 80.

User folder 80 comprises a series of person identifier, wherein have e-mail address, unified resource location (UKLs), telephone number (E.164 address), private network address (as NSAP ' s), distribute to a user's similar sign with other, user folder 80 can also comprise some additional information, and these information can be included in but the feature or service, the feature active state etc. that are not limited to be scheduled to.

Device file folder 82 comprises device attribute and points to the pointer current and network port that this equipment joins.This port can relatively be fixed, and for example for catv terminal, maybe can be temporary transient, as for wireless terminal.This SCN10 supposes that any equipment can temporarily receive on any port.Equipment also can connect by more permanent " logic " address.(, be a fixed network telephone number for example, in the behind of most portable No. 800 serial telephone numbers.In some cases, address and telephone number are same.)

Figure 17 provides an example that uses catalogue and file, wherein allows wireless and wired mobility in service capable network.

From user folder 80 and device file folder 82, service session control can reach object-oriented with preferential selection with the user capability coupling and communicate by letter.With each user-dependent customer-side (party) and device file folder, allow service session to be controlled at and dispose object-oriented, as can a to work communication protocol between the different interaction users.Can set up user folder 80 for the entity of the logic except that real crowd, notice that this point is very important.The user agent for example, can have aspect file 80) therefore this SCN10 can be for implementing provide the agency future of the S/W that moves, and this agency can representative of consumer roams in network and executes the task.In network, this agency will have logic " harbour " port, and it can be taken as port real, physics and treat equally, to allow the reception and the forwarding of message.Exemplary calling procedure

Figure 18 has illustrated in SCN10, is used for the network topology of multimedia call process.

The user of the multimedia PC84 that moves a multimedia conferencing application, wish to insert this SCN10 and set up a meeting.Multimedia PC84 has a SCN " little " to act on behalf of client 86, for enhancement service layer and the preliminary service layer that is linked among this SCN10 provides API.Content application (using as multimedia conferencing) is used and is strengthened and primary communication primitive 22,24, and agency and SCN10 by each layer join.Primitive string shown in Figure 19 a is an enhancement layer primitive 22, and shown in those Figure 19 d is primary layer primitive 24.The user of multimedia PC84, to wish to communicate via middle (ATM) network and first user 88 and second user in another (TDM) network in same (IP) network, atm network also provides multimedia bridge joint service 92.Multimedia PC84 can provide the video conference of using standard H.261 and use the G.723 audio conferencing of standard.First user's PC88 can provide H.261 video and G.723 audio frequency.User 90 has the voice call of a standard, and it meets G.711 standard, and this standard is used for traditional telephone exchange in the TDM network.By a Network Access Point (NAP) 94, legacy network is with the atm network interface of SCN10 compatibility.This NAP94 acts on behalf of client 64 for voice call provides a SCN.In NAP94, act on behalf of client 64 and can from transmission, isolate voice content and telephone signaling up hill and dale, so that need in SCN10, not be verified in information transmitted.In addition, act on behalf of client 64, can shine upon telephone signaling in primitive 22,24, use the notion of some enhancings among this SCN10.(if phone is the promoter of meeting, then act on behalf of client 64 and use the relevant primitive of agency, but in this example, phone is an addressee, therefore is not described in the use of primitive on that terminal).In SCN10 the transmission separate up hill and dale with content, be meant in acting on behalf of client 64, traditional terminal signaling must " be conditioned " or map in the control signal of this SCN10.CCS7 in this example, is assumed to be the control signaling, other, control signaling protocol newly developed is being just under development, especially interact and at other signaling at agency's one network.The proxy signaling converter can be designed so that with CCS7 (the perhaps transmission decoupling signaling protocol of other current use).In this specific example, the multimedia bridge service 92 that provides in atm network is used for setting up multimedia conferencing.Multimedia bridge service 92 can be provided by collection network 96 operators or third party.The multimedia bridge service 92 that obtains by the enhancement layer service broker, for video H.261 and G.711 audio signal bridge joint is provided.Because two PC84,88 in the IP station network use the G.723 audio frequency of high compression, Network Access Point 94 must be accessed, by means of between the PC of two IP network and multimedia bridge service 92 voice being connected application adapter, so PC can use multimedia bridge service 92.

Adaptation services is an edge service, and the user can ask by primitive.But service 92 of multimedia bridge and the required attribute of adapter can press from both sides by user and the device file that check is stored in ISP's catalogue, are inferred out by dialogue service control.Must use adapter in this process, because in fact be enhanced the multimedia bridge service 92 that the service broker obtains, be not to mate fully with desirable attribute.

Gateway 98 provides necessary " adjusting " in enhancing and preliminary service layer 18,20, to allow to use the network coupled of different technologies.Provide necessary and the irrelevant signaling conversion of transmission at enhancement layer gateway 98, and primary layer gateway 98 provide transport protocol conversion (IP ← → ATM, ATM ← → TDM).

Agency service software (rather than acting on behalf of the client) resides in NAP94a, and on the 94b, and acquisition ISP be sent out (posted) provides in the service of NAP94a, 94b.Usually, between two SCN, do not need NAP 94 a, 94 b, have content-transport layer separation clearly because pass the full detail transmission of two networks.Provide conversion at the SCN10 edge, permission and other are with the incompatible network junction of SCN.In any two incompatible networks, always need gateway 98.

In future, network will have the enhancing and the primary layer control logic among the Connection Service device 99a-99c of concentrating on of net for catching fish or birds scope, be separated with real transmission node.Have only closely-coupled path logic in node, to find.This separation is applied to NAP94a, 94b and gateway and node.Then, in this Walkthrough (Walk through), most of control logics reside among the Connection Service device 99a-99c.Preferably, be used to pass the path of the edge-to-edge in a single supplier field, connect control logic also in Connection Service device 99a-99c.

This Walkthrough hypothesis, in SCN10 IP station network, the agency is in NAP94a.And only act on behalf of client 86 in multimedia PC84.In the PC of SCN compatibility, the location is acted on behalf of and acted on behalf of the client also is possible.In fact this PC, comprises a NAP94.

The core of Walkthrough example is connection-oriented delivery communication path.Their dialogue foundation structure is applied in the Walkthrough.As indicated above, SCN10 also provides connectionless, message-oriented path, and relevant " dialogue ", but this connection does not illustrate.They also use primitive, but generally do not need to act on behalf of client 64, because content and transmission separate up hill and dale.In addition, be delivery signal itself, for example, agency and network control signal, and the path of setting up exists, but do not describe or explanation at this.Their foundation can be fully understood by the person skilled in the art of this area.

Walkthrough uses a concentrated dialogue controlling models (resembling a SCP), therefore, most dialogue is controlled among the Connection Service device 99a, can develop a highly distributed version, it is distributed in dialogue control and dialog logic and passes Connection Service device 99a, 99b and 99c one in a big way in.

Figure 19 a describes at the multimedia conferencing establishment stage to 19c, occurs in the order of the incident in the enhancement service layer 18.

Step in this process is as described below: 101. content application [multimedia conferencing] at multimedia PC84 comprise relevant with one

The primitive string of attribute or parameter sends a session establishment request.As shown in Figure 19 a

The primitive string, be a subclass for the primitive 22 of SCN10 definition.In addition, only mark

Gone out to be used for the enhancing intercommunication primitive 22 of enhancement service activity.Primary communication primitive 24 exists

Mark among Figure 19 f.Service session control is received in advance by catalogue 97 (Figure 17)

The file (data do not mark) that is used for the user of multimedia PC84, and understand and use

Family communication requirement and ability.102. the control of the service session among the Connection Service device 99a, identification multimedia PC84 user, and

Inquire about about multimedia PC84 user's data to security server (not marking).103. [suppose it is the part of Connection Service device 99a, PC84 holds security server to multimedia

One of row is authorized and authentication check.Multimedia PC84 is authorized to set up multimedia conferencing,

And as the meeting effector.[fail safe can be obeyed as catalogue on another server

Affair device 97 (Figure 17)] security server returns the user by authorizing and authentication result.104. dialogue service control is to LIST SERVER 97 invoked first users' of request file

Folder 88.LIST SERVER 97 takes out file 80[, and it shows that first user 88 has

H.263 video and G.723 audio capability], and for being transferred to service session control,

The result is packed.And LIST SERVER 97 sends this document and clips to service session control.105. service session control is to second invoked user's 90 of LIST SERVER 97 requests literary composition

Part folder 80.It shows that G.711 second user 90 have 106. LIST SERVER 97 takes out file 80[

Audio capability], and for being transferred to service session control, the result is packed.107. and LIST SERVER 97 transmission this document clip to service session control.108. sending a message, service session control whether decide them be willing to first user 88

Meaning is participated in this meeting.109. returning, first user 90 meets a message that shows wish.110. sending information to the second user 90, service session control decide them whether also

Be ready to participate in this meeting.111. second user 90 returns the information of an expression wish.112. by these three files [84,88 and 90], service session control is determined need be with two

Individual H.263 port, two be a port and the multimedia that is connected of port G.711 G.723

Bridge.113. service session be controlled to be two H.263 port, two G.723 port and one is G.711

Port is formulated the request of multimedia bridge, and is sent to the agency of NAP99a.Should

Request comprises the primitive attribute that the user submits to, and the primitive attribute list illustrates the expense order of contract

Mark.[annotating: H.261 and H.263 can use the interworking of QCIF form] 114. service session controllers send to the bridge request agency who is positioned at NAP99a.115. the bridge service that scan agent is listed in the NAP of all accesses provides, and returns one

Individual the most approaching coupling be provided at service session controller among the Connection Service device 99a.116. the service session controller can or send one and arrives the user near matching scheme, carries

For the selection of a bridge, this may be according to fee condition, perhaps selects one automatically

Approaching coupling.117. after bridge is selected to make, service session control find bridge connect be not one accurate

Coupling, therefore, which type of adapter service session control decision needs, and makes with selected

Bridging communication become possibility, and propose out an adapter and obtain request.System from

Moving deciding ability is used for making user's communications to oversimplify.118. the service session controller send one G.723 ← → G.711 adapter obtains message to this

Ground NAP 94a.119. local NAP 94a obtains adapter, and notifies the service session controller of its port.If 120. adapter obtains failure, service session control is returned bridge the request that provides is provided, just in case use

Family (or system) is wanted to produce an alternative bridge and is selected.If 121. adapter obtains success, service session is controlled to be selected bridge and proposes a bridge joint

Obtain request.122. service session control sends this and obtains the Connection Service device 99b that asks the control bridge, and is right

Back Connection Service device 99b inserts and obtains bridge 92.123. Connection Service device 99b will comprise port numbers and type obtain the result turn back to the service right

Words control.If 124. the trial of obtaining failure, service session control will turn back to bridge provides the request point

Select again.125. obtain success as bridge, the selected bridge of service session control notice representative provides

NAP94a, contract can be accepted.126. service session control also sends a message to Service Management, shows that contract accepts, and

And strengthen resource network bridge joint and adapter] obtain, should note, and be added to service

In the dispatch list.127. service session control can obtain and enclose necessary communication path resource now.Clothes

Be engaged in talking with control and send a request, comprise row of the port that all need connect

Table, to connecting dialogue control, it also in Connection Service device 99a, the description bag that connects

Draw together end-user port address [from file], auxiliary unit port [as bridge (

Among the ATM collection network 9b)] and adapter [in NAP94a].Connecting please

Ask, send, and comprise preliminary service primitive attribute, this attribute kit together with port

Draw together target expense, QoS lsafety level, and the interactivity that needs [FDX, HDX, wide

Broadcast, single-point transmission, multileaving etc.].128. connect dialogue control propose a series of, to send to preliminary service layer 20[activity at figure

Describe among the 19f] the communication path request.Preliminary service floor 20 returns the road about selecting

The details in footpath.These details comprise a tabulation of the connection of foundation, comprise that those pass through

The content that selected gateway 98 and enhancement service auxiliary unit are set up.If the failure 128a. the preliminary service layer connects then guides service session control to forward its termination stage to.129. preliminary service resource (communication path) assignment that is returned is to connecting dialogue.130. the preliminary service resource and a tabulation of attribute, be sent to Connection Service device 99a

In service session control.131. be used in all resources in enhancing and the preliminary service layer 18,20, all assignment arrives whole now

The dialogue of body enhancement service.132. the Service Management of a message in the Connection Service device 99a, table are sent in service session control

Bright according to the clause of acting on behalf of electronic contract 72, strengthen the resource use and begin.133. notified his connection of user 88 is set up.134. notified his connection of user 90 is set up.135. be connected with 90 the notified user of the originating user of multimedia PC84 88.

Figure 19 d (comprising 136～142) illustrates in the meetings and activities stage behavior of some major function unit.

Figure 19 e has described in the multimedia conferencing ending phase, occurs in the order of enhancement service layer incident, and the step in this process is as follows: 143. users 84 at multimedia PC stop this meeting.User 84 or by leaving application

Window perhaps sends signals in Connection Service device 99a by producing appropriate primitive

Service session control stops current multimedia conferencing.144. service session control sends a message to first user 88, notification of meetings finishes.145. service session control sends message to the second user 9), notification of meetings finishes.146. service session control is sent a release information to Connection Service device 99b, it monitors many matchmakers

Know from experience view bridge 92.In turn, Connection Service device 99b discharges bridge 92.147. service session control is sent a release message and is come release adapters to NAP99a.148. the service of service session control notification service management accounts is used and is finished, and is used for billing purpose.Meeting adjourned 149. service session control notice connects dialogue control, finishes service session then.Send a request to primary layer connection dialogue control 150. enhancement layer connects dialogue control, release

Put transmission path and relevant resource, finish to connect dialogue then.151. the preliminary service path controller discharges primary path/connection in their authority.Send a message to Service Management 152. primary layer connects dialogue control, show and use elementary clothes

The end of being engaged in is used for billing purpose, finishes connection session then.

Figure 19 f describes at the multimedia conferencing establishment stage, occurs in the incident of preliminary service layer

In proper order.153. primary layer connection dialogue control receives to connect and describes that it comprises that the end-user port address is [next

From file 80], service auxiliary unit port address [comes comfortable ATM collection network 96

In bridge 92 and the adapter in NAP94a].At the beginning of being sent out connection attribute and comprising

Level intercommunication primitive 24 and relevant parameter, parameter and communication path expense target, QoS,

Safe level and interactivity [as FDX, HDX, broadcasting, single-point transmission, multileaving etc.].

Connect dialogue control proposition path request is provided.154. the path provides request to be sent to the agency that is connected on NAP94a and the 94b, and serves end

The resident network of the auxiliary and gateway port of end subscriber, network service.155. acting on behalf of return path by each provides.This provide the attribute that comprises selected path [expense,

QoS, safety etc.].Can pass to user, user agent or should be used for providing selection 156. the path provides,

Perhaps the agency can select providing of use by connecing dialogue control.If do not exist 156a. effectively provide, or all providing all tried, and perhaps the user please

Ask and abandon, then the preliminary service layer returns a service session ending request to enhancement service

Layer.157. the connection dialogue promotion outbound path that provides of selection is provided obtains request.Obtain request 158. connect the path of an edge-to-edge of dialogue control, net in territory to each

Connection Service device 99a, 99b and 99c.159. local Connection Service device 99a-99c attempts connecting.160. local Connection Service device 99a-99c responds with the trial result who obtains.If attempt failure 161. obtain, connection dialogue control turns back to the path provides the request point.Transmit a preliminary service contract 162. connect dialogue control, receive message give NAP94a and

94b。163. connecting dialogue based on contract controls the clause notification path and obtains Service Management.164. connect the beginning that dialogue control request record primary resources is used.165. connecting [among the Connection Service device 99as] of dialogue control notice in the enhancement service layer connects

Dialogue control, the communication path request finishes.

The connection in above-mentioned Walkthrough, carried out, adaptive, bridge and adjusting conversion have been showed in Figure 20 form.Should be appreciated that in that strengthen and/or elementary communications service layer 18,20 change of network signaling protocol between network generally need be in the adjusting of inserting gateway 98 places.But for the purpose of last calling Walkthrough, number signaling system 7 is all used in all are two-layer by hypothesis, does not therefore need signaling to regulate restriction.

The industrial applicability energy

The invention provides a service capable network [SCN10)], it is divided into functional layer. Be network function that function is divided layer, reduced development time and complexity relevant when in network, introducing new function. The service that network provides is bound in the inner transmission technology traditionally. The result is that revising or increasing service needs to change many different technology, often need to carry out to each node in the legacy network modification of software and/or equipment. Providing the port service in the legacy network that uses different technologies, if not impossible, also is very difficult. This SCN10 repartitions the function of network, namely divides according to level course, again according to edge and the incompatible division of core set, so that the impact of ongoing upgrading and modification is minimum.

Network function is divided into layer, also allows the functional independence in the individual course to upgrade separately in other layer. And SCN10 has simplified the access of network service, and this strengthens intercommunication primitive 22 and 24 realizations of primary communication primitive by using, and they have reflected communication requirement nature, that repeat. Compare with the interface in being present in legacy network, intercommunication primitive 22,24 is for user application person provides more simple network interface, and purpose is the new network providing capability of exploitation.

SCN10 also is linked into and the different ISP who selects a communication requirement that can satisfy best the user and the method for network function for user, application or user agent provide. SCN10 is designed to hold the ISP of a large amount of communication networks that joins associating, and expectation is reacted with ever-increasing competition to making policies more flexibly. In addition, network function is divided into and strengthens communications service layer 18 and primary communication service layer 20, allows among the present SCN10 of providing of many new ISPs. SCN10 also allows terminal use or their agency to come dynamically to develop different services in ability and price, and these can make the different technologies that uses with those ISPs relevant.

SCN10 is also in network or pass network and be provided at transparent interoperability between fixing, roaming and mobile terminal use, equipment and the application.

Claims (33)

1. the high performance service communication network that between information source and message pick-up, can communicate by letter, this network comprises that first logical layer (14) and second logical layer (16) that nodal function is provided that network function is provided is characterized in that:

First logical network layer (14) is divided into multinode service (18), it can be by first group of primitive of the network utilisation of user (54), user agent (56) or adjacency (22) visit (access), first group of primitive is permitted and first logical network layer function interworking, begins and controls the multinode service;

Second logical layer (16) is divided into node service (20), it can be by second group of primitive of network utilisation (24) visit of user, user agent, first logical network layer multinode service or adjacency, second group of primitive allow with second logical layer in function interworking, begin and control communication path, and support transfer function; And

First and second logical layer have the layer structure of a recurrence.

2. a high performance service communication network described in claim 1, wherein first logical layer (16) is divided into the multinode service that comprises Transformation Service (32), Service Management (34), directory service (36), Control on Communication (38) and agency (40).

3. a high performance service communication network described in claim 1 or 2, wherein second logical layer (18) is divided into the node service that comprises conversion (42), management service (44), transmission (46), connectivity service (48), service quality (QoS) (50) and act on behalf of (52).

4. a high performance service communication network described in claim 2 or 3 is wherein acted on behalf of (52) by guaranteeing that coupling agency (68) and negotiation agency (70) for user (54) or user agent (56) service carry out.

5. a high performance service communication network described in claim 4, wherein coupling (68) and negotiation (70) agency finish the predefined part of an electronic contract (72), after a communication session is acted on behalf of, they will present to user (54) or user agent (56).

6. a high performance service communication network described in claim 5, wherein the agency in second logical layer (16) carries out by connecting the agency, and this connections is acted on behalf of and is also finished the predetermined part of this electronic contract (72).

7. as any described high performance service communication network among the claim 2-6, wherein Transformation Service (32) comprising:

Content adaptation (62), expression of its transform coding content format and transmission aspect, and do not need to understand its implication;

Regulate (66), when entering or leaving this network, between expression, provide bi-directional conversion;

Act on behalf of client (64), increase adjusting by setting up intercommunication primitive by content and link information, purpose is to make agency service become possibility.

8. as any described high performance service communication network among the claim 2-7, wherein management service (34) is used by the data that obtain in the electronic contract (76), edits to be used for the network planning and network use statistics really is provided.

9. as any described high performance service communication network among the claim 2-8, wherein directory service (36) comprises the LIST SERVER that is used to store user's group (party) file (80) and device file folder (82), file can be removed be used for locating one with the relevant address of user (54), and the device-dependent address that has with the user or use, purpose is to allow to communicate to connect to come into force.

10. as any described high performance service communication network among the claim 2-9, wherein Control on Communication (38) comprises dialog logic, and it operates controls a communication session by this service capable network (10).

11. as any described high performance service communication network among the claim 2-10, wherein agency (40) comprises agency (68,70), it is used or receives from the network primitive of the adjacency of first group (22) from user, this primitive and parameter correlation, parameter makes the agency obtain one or more services of listing and provides, these provide and satisfy user (54) or in abutting connection with a demand for services of network, in abutting connection with network by primitive and agent communication.

12. the high performance service communication network described in claim 11, wherein agency (68,70) presents the network that all services offer user's application (58) or adjacency, allow the network of user (54) or adjacency from service provides, to select the service an of the best to provide, satisfy demand for services.

13. as any described high performance service communication network in claim 11 or 12, wherein agency (68,70) is based on one or more standards that are predetermined, can independently select a service to provide, and provide the network of presenting to user's application (58) and adjacency selected service.

14. as any described high performance service communication network among the claim 11-13, wherein the network of adjacency is by one second agency (68,70) representative, second agency passes to agency in the service capable network (10) to primitive (22).

15. as any described high performance service communication network among the claim 11-14, wherein agency (68,70) is a coupling agency (68), the service that it is listed by searching provides, select service to provide, the service of listing provides to have and the primitive (attribute that 22 relevant each argument are mated.

16. as any described high performance service communication network among the claim 11-15, wherein the agency has one to consult agency (70), it receives the primitive (22) relevant with argument from the network that a user uses (58) or an adjacency, this argument provides a scope of acceptable value at least to the agency, this acceptable value is relevant with the particular aspects that a service provides, and should consult the agency, and be suitable for providing negotiation with a service with feature in the acceptable value scope.

17. as any described high performance service communication network among the claim 2-16, wherein first logical layer (14) further be divided into the function (26) of path independence and with the path relevant function (28).

18. as a service capable network described in any claim in front, wherein second logical layer (16) further is divided into the function relevant with the path (28) and a function (30) in the direct line in path.

19. as a service capable network described in any claim in front, the wherein connectionless and connection-oriented communication session of network (10) support.

20. the high performance service communication network described in claim 19, wherein connectionless dialogue can be not have the best communication session that service quality guarantees, or have the communication session that service quality guarantees.

21. as any described high performance service communication network among the claim 6-20, wherein the ISP that faces by the user of electronic contract (72) offers user (54).

A 22. high performance service communication network described in claim 6, if wherein a communication session is crossed over more than an ISP, each ISP in communication session, preserve a subdivision of this electronic contract (72), the communication session part correlation that itself and that ISP provides.

23. one kind provides service method in the layered communication network, network has first logical layer (14) and second logical layer (16) that nodal function is provided that network function is provided, and it is characterized in that:

Path independence function (26) and per-path functionality (28) are provided in first logical layer (14), path independence function (26) comprises the edge of combination, navigation with the ability of interworking, these are implemented by service and the abstract of network, and the function (28) that the path is relevant comprises the abstract service of finishing end-to-end communication of using path-level; And

The nodal function that provides in second logical layer (16) comprises path control and node support function, allows the network of terminal use, user agent, adjacency and the service (18) in first logical layer (14) to use the node communication path.

A 24. method described in claim 23, wherein represent function conversion service (32) and agency (40) in the edge center classification with being included in of path independence merit, and the Service Management of non-edge center (34), directory service (36) and Control on Communication (38).

25. a method described in claim 24, wherein:

Transformation Service (32) comprises the essential content format conversion that makes different types of user (54) or the interactive operation of user agent (56) energy.；

Service Management (34) provides the identification of user, equipment and application, and is associated with the service contract of their signings;

Directory service (36) provides the automatic compiling of network range name, addressing, location and route topological information, and transfer algorithm also is provided, and it can be used for translating between the expression that different sub-network uses;

Control on Communication (38) provides default communicate configuration, as those configurations of multi-point or Virtual Private Network needs, in addition, also provides life cycle and service control for invoked any configuration; With

Agency service (40) makes the terminal use can select service in first network layer (14).

26. a method described in claim 24 or 25, wherein network management is a service, and it at least partial automation uses and provides management data by the data that obtain in the electronic contract (72).

27. a method described in claim 23, wherein per-path functionality comprises:

Transformation Service (32), comprise the adjusting of edge, path, being used to control adaptive, message produces and message translation, externally system and first network layer (14) and act on behalf of that interworking needs these between the service (18) among the client (64), act on behalf of the conventional external system of the adaptive unformatted of client (64), so they can utilize the service ability in first network layer;

Service Management (34), it comprises service configuration, account and tactical management;

Directory service (36), it comprises Route Selection and the interoperability resolution that is used for communication path equipment and service;

Control on Communication (38), it comprises path session activation mechanism;

Agency service (40), it can select to have the end end communication path of suitable service quality, and the assembling of electronic contract (72) details is provided for first network layer.

28. as any one described method among the claim 23-27, wherein nodal function comprises:

Transformation Service (42), it provides the regulating power as bit stream shaping and flow control;

Management service (44), it provides physical component to activate;

Transmission service (46), it provides port terminal, exchange and bit delivery;

Connection Service (48), it provides encrypted physical;

QoS serves (50), and it provides the path supervision and uses control.

A 29. method described in claim 28-29, wherein strengthen intercommunication primitive (22) and obtain and Be Controlled by using, and the function (30) in the direct line in path obtains in advance by use primary communication primitive (24) and controls with the function (26) of path independence, per-path functionality (28).

30. a method described in claim 29, wherein user agent (56) or use (68) and help terminal uses (54) (16) in first logical layer (14) and second (16) logical layer to search and select to serve.

31. a method described in claim 30, wherein user agent (56) and application (58) and agency (68), (70) interworking, agency (68), (70) representative of consumer are acted on behalf of or application obtains and the control service.

32. a method described in claim 32, wherein the agency is coupling agency (68), and it searches an immediate service coupling according to clause fixing or decision.

33. a method described in claim 32, wherein the agency consults agency (70), and it searches an immediate service coupling according to that find, inconclusive external environment condition.

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