CN101997852A - Method and equipment for communicating next generation network and IP multimedia subsystem - Google Patents
Method and equipment for communicating next generation network and IP multimedia subsystem Download PDFInfo
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- CN101997852A CN101997852A CN2009101662821A CN200910166282A CN101997852A CN 101997852 A CN101997852 A CN 101997852A CN 2009101662821 A CN2009101662821 A CN 2009101662821A CN 200910166282 A CN200910166282 A CN 200910166282A CN 101997852 A CN101997852 A CN 101997852A
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Abstract
The invention provides a method and equipment for communicating a next generation network (NGN) and an internet protocol (IP) multimedia subsystem. The method comprises the following steps of: receiving a first session initiation protocol (SIP) message sent by a first network element, and querying a first message change rule matched with the first SIP message; and changing the first SIP message into a second SIP message meeting an SIP standard of a second network element according to the first message change rule, and sending to the second network element, wherein the first network element is a next generation network application servicer (NGN AS) and the second network element is an IP multimedia subsystem (IMS) core network, or the first network element is an IMS core network and the second network element is an NGN AS. Gateway equipment capable of modifying the SIP message is arranged between the NGN AS and the IMS core network, the SIP message is matched in the transmission process, and complete compatibility of the NGN and the IMS is realized on the basis of not modifying the NGN AS, so that the service provided by the NGN can be simultaneously suitable for fixed phones and mobile phones.
Description
Technical field
The embodiment of the invention relates to network communications technology field, relates in particular to the communication means and the equipment of a kind of next generation network and IP Multimedia System.
Background technology
Under the development trend of the network integration, traditional communication network all will develop into the integrated network with fixed network and mobile network gradually, how to realize next generation network (Next GenerationNetwork, hereinafter to be referred as NGN) the network integration become a focus of present industry research, also become the important development trend of several years communications industries of Future in China.And has employing session initiation protocol (Session Initiation Protocol, hereinafter to be referred as SIP) and with IP Multimedia System (the IP Multimedia Subsystem of the irrelevant feature of access way, hereinafter to be referred as IMS) technology, because its advantage aspect the network integration more and more is subjected to paying close attention to widely, become the developing direction of following core network gradually, become the platform of generally acknowledged multimedia, professional control and the network integration.
IMS is third generation partner plan (Third Generation Partnership, hereinafter to be referred as 3GPP) subsystem of the support IP multimedia service that proposes at the Release5 version, its core characteristics be based on Session Initiation Protocol and with the independence of access technology, therefore also require to support the SIP interface for the terminal that inserts the IMS network.And at fixed network NGN, though it is also for realizing based on Session Initiation Protocol, but because fixed network is different with the concrete business that the mobile network provides, and because the diversity of NGN system, the parts of SIP in NGN network carrying may not necessarily with the corresponding component intercommunication in the IMS network, may have some difference in realization, this just becomes and hinders the big bottleneck that NGN system and IMS network merge mutually.
Can better merge in order to make both, a plurality of technical schemes that fixed network NGN merges to IMS have been proposed in the prior art, but the implementation of prior art scheme mainly all is by revising NGN application server (Application Servicer, hereinafter to be referred as AS) finish adaptive with the IMS network, NGN AS is transformed into the operation parts that satisfy IMS, by the modification of NGN corresponding component being finished between the two adaptive.
The inventor finds in realizing process of the present invention: though the mode of this modification parts makes that NGN can be successfully and the IMS compatibility in the prior art, but this mode self is revised the NGN parts, its requirement according to the IMS network is modified as the pattern that meets IMS, thereby make NGN after having merged with IMS, but can't carry out well adaptive and compatible with other network or system, i.e. NGN that realizes in this way and the fusion of IMS, make that both mutual couplings are too strong, thereby hindered the development of other business of NGN.Therefore, how do not revising on the basis of self parts, realizing and the fusion of the low coupling of IMS network, just becoming one of research focus in the network integration technology now at the NGN network.
Summary of the invention
The embodiment of the invention provides the communication means and the equipment of a kind of next generation network and IP Multimedia System, have only and just can finish adaptive with the IMS network by self parts is made amendment in order to solve NGN network in the prior art, thereby the very flexible that causes, the mutual strong defective of coupling are to realize the complete compatibility of the low coupling of NGN system and IMS network.
The embodiment of the invention provides the communication means of a kind of next generation network and IP Multimedia System, comprising:
Receive first session initiation message that first network element sends, first message change rule of inquiry and described first session initiation message coupling from default message change regular collection;
According to described first message change rule described first session initiation message is changed to second session initiation message of the session initiation protocol standard that meets second network element, and described second session initiation message is sent to described second network element.
The embodiment of the invention provides a kind of IP multimedia service control gateway equipment, comprising:
Message change rule query unit is used to receive first session initiation message that first network element sends, and inquires about first message change rule with described first session initiation message coupling from default message change regular collection;
Message change unit, be connected with described message change rule query unit, be used for described first session initiation message being changed to second session initiation message of the session initiation protocol standard that meets second network element, and described second session initiation message is sent to described second network element according to described first message change rule.
The next generation network of the embodiment of the invention and the communication means of IP Multimedia System and equipment, by between NGN AS and IMS core net, adding the gateway device that can on-the-fly modify sip message, this gateway device can be in the transport process of sip message, after changing, the sip message that transmit leg is sent is transmitted to the recipient again, make it to meet recipient's Session Initiation Protocol standard, thereby in the process of change and forwarding, IMS and the difference of NGN on the Session Initiation Protocol standard have been shielded, need not to revise on the basis of business realizing, realized the complete compatibility of NGN and IMS, the business that makes NGN provide can be applicable in fixed line and the mobile phone simultaneously.
Description of drawings
Fig. 1 is the flow chart of the communication means of a kind of next generation network of the embodiment of the invention and IP Multimedia System;
Fig. 2 is the flow chart of the communication means of another kind of next generation network of the embodiment of the invention and IP Multimedia System;
Fig. 3 is the flow chart of the communication means of another next generation network of the embodiment of the invention and IP Multimedia System;
Fig. 4 is the flow chart of the communication means of another next generation network of the embodiment of the invention and IP Multimedia System;
Fig. 5 is the structural representation of a kind of IP multimedia service control gateway of embodiment of the invention equipment;
Fig. 6 is the structural representation of the another kind of IP multimedia service control gateway of embodiment of the invention equipment.
Embodiment
Further specify the technical scheme of the embodiment of the invention below in conjunction with the drawings and specific embodiments.
At present, the IMS network has become the dreamboat framework of next generation network, the platform that has been considered to the multimedia of generally acknowledging, professional control and the network integration, the fusion of fixed network NGN and IMS network has been trend of the times, but from the current level of technology, still there is certain problem in the compatible NGN of IMS network security.Because IMS is based on Session Initiation Protocol, so its network that requires to insert it also must support the SIP interface, though and the NGN network also be to realize based on Session Initiation Protocol, the content of the Session Initiation Protocol that itself and IMS network are supported is also inconsistent.For example: from the sip message that the NGN network sends, do not comprise P-Asserted-Identity field, and in IMS, comprise this field; In addition, though the sip message head field that has all has definition in NGN He among the IMS, each self-defining meaning is fully different, and many differences make the NGN network all exist certain difficulty in the process that merges with the IMS network.
The next generation network of the embodiment of the invention inserts the method and apparatus of IP Multimedia System, by offer IP multimedia service control (the IMS Service control of each application network of IMS at NGN application server and IMS core network, hereinafter to be referred as ISC) between the interface, increase an ISC gateway device, this ISC gateway device can be changed the sip message that transmits between the two according to certain sip message change rule, the sip message that a feasible wherein side sends is after the change through message change rule, the opposing party's Session Initiation Protocol standard-required be can satisfy, thereby the fusion and compatibility of two kinds of networks realized.Need to prove, the ISC interface of indication offers the unified interface of each application network of IMS for the IMS core network herein, this ISC interface is supported Session Initiation Protocol, provide a good channel for the sip application server of each network inserts the IMS network, sip application server comprises the sip application server under the NGN network and the application server of IMS core net.
Fig. 1 is the flow chart of the communication means of a kind of next generation network of the embodiment of the invention and IP Multimedia System, and as shown in Figure 1, this method comprises:
In the embodiment of the invention, first network element and second network element refer to NGN application server and IMS core net respectively, perhaps refer to IMS core net and NGN application server respectively.The ISC gateway device is by carrying out adaptive dynamically to the sip message that transmits between the two, promptly when transmitting, the sip message of transmission is changed, the sip message that a feasible wherein side sends is after the adaptive change of process, can satisfy the opposing party's Session Initiation Protocol standard-required, thereby make NGN AS to be linked in the IMS core net, realize compatibility with the IMS network by ISC interface.
At first, after the ISC gateway device receives first sip message that first network element sends, will be in default message change regular collection the message change rule of inquiry and this first sip message coupling.The set of the default message change rule of indication herein specifically is stored in the memory cell in the ISC gateway device, it perhaps is ISC gateway device self database, in this default message change regular collection, all message change rules that the sip message that transmits between NGN AS and the IMS core net is changed have been comprised.But for the first concrete sip message that the ISC gateway device receives, be not that all message change rules that comprise in this set all are applicable to this first sip message, therefore, to receiving before first sip message carries out concrete change operation, the ISC gateway device need be changed the message change rule of inquiring about in the regular collection with this first sip message coupling in message, by first sip message being carried out the extraction and the analysis of relevant information, select to change rule, thereby could change it with the message change rule that inquires with the message of this first sip message coupling.
Particularly, in embodiments of the present invention, claim the ISC gateway device from the set of default message change rule, all and message change rule first sip message coupling that finally inquires is first message change rule.For the first different sip messages, first message change rule that the ISC gateway device inquires is with different.For some first sip message, for the requirement of the Session Initiation Protocol that satisfies recipient's network, it may need the field changed more, thereby that inquire also more with first message change rule this first sip message coupling; And for some first sip message, it may need the field changed less, and it is also fewer that first message with this first sip message coupling that therefore inquires is changed regular number; And for some first sip message, the Session Initiation Protocol standard that it may need not to make amendment and just can meet the recipient, first message with this first sip message coupling that therefore inquires is changed regular number will be zero.Concrete Query Result situation is specifically relevant with the composition of the field of first sip message.
If first message change rule of first sip message that the ISC gateway device inquires and receives coupling, illustrate that this first sip message does not satisfy the standard of recipient's Session Initiation Protocol, therefore the ISC gateway device will be changed first sip message according to first message change rule that inquires, and make it to meet recipient's Session Initiation Protocol standard.Concrete change method defines in message change rule, the ISC gateway only need be followed this message change rule, successively each the message header field that does not meet recipient's Session Initiation Protocol standard in first sip message is changed, amended first sip message is sent to the recipient of this first sip message, promptly second network element gets final product again.
The embodiment of the invention provides the communication means of a kind of next generation network and IP Multimedia System, in the transport process by the sip message between NGN AS and IMS core net, after changing, the sip message that transmit leg is sent is transmitted to the recipient again, make it to meet recipient's Session Initiation Protocol standard, thereby in process, IMS and the difference of NGN on the Session Initiation Protocol standard have been shielded to the change of sip message of transmission and forwarding, need not to revise on the basis of business realizing, realized the complete compatibility of NGN and IMS, the business that makes NGN provide can be applicable to fixed line and mobile phone simultaneously.
Fig. 2 is the flow chart of the communication means of another kind of next generation network of the embodiment of the invention and IP Multimedia System, and as shown in Figure 2, this method comprises:
In the present embodiment, first network element can be NGN AS or IMS core net, and corresponding first sip message is the sip message based on the Session Initiation Protocol standard of NGN, or based on the sip message of the Session Initiation Protocol standard of IMS.
In presetting message change regular collection, all message change rules of formulating at the Session Initiation Protocol difference between NGN network and the IMS network have been comprised, for each message change rule, all define the attribute of the direction that comes into force, promptly this message change rule should come into force when the IMS network sends sip message at the NGN network, still come into force when the NGN network sends sip message at the IMS network, perhaps all come into force for both direction.Therefore, the ISC gateway is after receiving first sip message, to at first select the message change rule of the change direction coupling of all and this first sip message according to the sending direction of first sip message, promptly from as the corresponding embodiment of Fig. 1 filter out in the set of default message change rule and the unmatched message change of the change direction of this first sip message regular.In the present embodiment, claim to obtain through this selection, with all message change rules of the sending direction coupling of first sip message be second message change rule, promptly pass through the query manipulation this time of ISC gateway device, the set of the message that obtains change rule is the set of second message change rule.
Particularly, each bar message change rule of storing in the set of default message change rule can define this attribute that its change direction is represented in a sign position.For instance, can be defined as: when the value of this sign position was 0, it was effective to represent this message change rule the IMS network to be sent to the change of sip message of NGN network; When the value of this sign position was 1, it was effective to represent this message change rule the NGN network to be sent to the change of sip message of ISM network; And when the value of this sign position is 2, represent this message change rule all effective for the change of the sip message of both direction.The implication of each numerical value representative can be provided with arbitrarily as required, is not limited to above-mentioned a kind of form.
Particularly, in the present embodiment, the ISC gateway device will extract the source address information of the sender address of representing this first sip message from first sip message after receiving first sip message, this source address information is discerned, determined the sending direction of first sip message.This source address information is that sip message is before being sent by NGN AS or IMS core net, be encapsulated in information in the sip message together in company with the flesh and blood of sip message, be specially the address of the transmit leg of sip message, in the present embodiment, specifically refer to the address of NGN network or the address of IMS network.Because the ISC gateway device is arranged between NGN network and the IMS network, therefore if the source address information of extracting from first sip message this moment is specially the address of NGN network, the sending direction that then can determine this first sip message is the NGN network to IMS network, on the contrary, if this moment, the source address information extracted from first sip message was specially the address of IMS network, the sending direction that then can determine this first sip message for the IMS network to the NGN network.
After the ISC gateway device has been determined the sending direction of first sip message, promptly determined the change direction that need are changed this first sip message, thereby can be according to the change direction of determining, all message of selecting to match from default message change regular collection are changed rule, obtain the set of second message change rule.For example, when the source address information that extracts from first sip message when the ISC gateway device is the address of IMS, to select allly from default message change regular collection, the value of the sign position of representative change direction attribute is the set that 0 or 2 message change rule is formed second message change rule; And the source address information that extracts from first sip message when the ISC gateway device is when being the address of NGN, to select allly from default message change regular collection, the value of the sign position of representative change direction attribute is the set that 1 or 2 message change rule is formed second message change rule.
For each sip message, its message format is followed Session Initiation Protocol, be changeless, comprise begin column, message header and three parts of message body, begin column has wherein partly comprised the requesting method information of sip message, has represented each sip message specifically to belong to which kind of SIP requesting method; The message header part has then comprised one or more message header fields, and each message header field all is divided into a field name and field value two parts; The message body part then is the entity content part of this sip message, is made up of continuous binary numeral.
For different networks, the difference of the Session Initiation Protocol layer that it is followed is mainly derived from the difference of each message header field of sip message, therefore, in embodiments of the present invention, what message change rule was primarily aimed at is the change of each message header field of sip message, be all concrete corresponding message header field of each message change rule, and, all have corresponding message change rule to support its change for the sip message head field that each there are differences in NGN network and IMS network.And according to analysis to the difference of the Session Initiation Protocol of IMS network and NGN network, be not that each the message header field that comprises in the sip message of transmission between the two all needs change, therefore before the ISC gateway device is changed the sip message that receives, need judge each message header field that this sip message comprises, judge whether it needs the operation of changing.In the present embodiment, can realize the operation of concrete judgement by the one or more effective terms of definition in message change rule.In message change rule definition effective term, specifically certain the message header field to sip message or sip message limits, when having only the message header field of sip message self or sip message to satisfy the effective term that limits in the message change rule, this message change rule is only the message change rule with this sip message coupling.
Therefore, the ISC gateway device is in the judgement of first sip message that receives being changed direction, filter out and the unmatched message change of the change direction of first sip message rule, obtain after the set of second message change, also need whether the effective term of all second message change rule set up and judge, from the set of second message change rule, filter out invalid second message change of effective term rule, all message change rules that obtain at last are first message change rule, and the effective term of first all message change rule is to be satisfied with first sip message that receives.
Particularly, in all message change rules, all defined effective term, comprising first effective term, be used for the SIP requesting method of sip message is limited, be specially limit this message change rule institute at be the change that belongs to the sip message of which kind of SIP requesting method, promptly define in this first effective term this message change regular at the requesting method of sip message be the SIP requesting method of an appointment.Because in Session Initiation Protocol, defined six kinds of SIP requesting methods of sip message altogether, and for the sip message of different SIP requesting methods, the ISC gateway device is different to its change.Therefore, in the present embodiment, to first sip message that receives, the ISC gateway device is after the set that inquires second message change rule, should from this first sip message, extract requesting method information, whether the requesting method of judging first sip message conforms to the SIP requesting method of appointment in first effective term of second message change rule, judge promptly whether first sip message satisfies first effective term of each second message change rule, and filter out thus in the set of the second change message rule and unmatched second message change of the requesting method information of first sip message rule.Particularly, this first effective term can be defined as the form of the expression formula that is similar to " [[method]]～equl～INVITE ", and the meaning of this expression formula is: the SIP requesting method of first sip message is " INVITE ".If the effective term of a certain second message change rule is this qualified expression, and the requesting method information that the ISC gateway device extracts from first sip message does not satisfy this conditional expression, the ISC gateway device is thought that then this second message change is regular and is not suitable for first sip message that receives, promptly with first sip message and do not match, then should be with this second message change redundant rule elimination from the set of second message change rule.
Further, for each message change rule, in its defined effective term except comprising first effective term, can also comprise second effective term, be used for the message header field of sip message is limited, be specially the message header field of sip message or numerical value or the character string that the message body field should comprise its appointment.And this situation is applied in: at the difference of Session Initiation Protocol between IMS network and the NGN network, a certain message header field in the sip message is only when having comprised a certain specific numerical value or character string, just need be modified, like this, then need in corresponding message change rule, define second effective term of representing this message header field to comprise the character string (or numerical value) of a certain appointment with this message header field.
Particularly, in the present embodiment, if certain second message is changed in the regular effective term except comprising one first effective term, when also comprising one second effective term, the ISC gateway device is in inquiry first message change process of rule from the set of second message change rule, satisfy this first effective term even determine first sip message that receives, second effective term that also needs whether first sip message to be satisfied this second message change rule is judged.The detailed process of this judgement is: the ISC gateway device is from the message header field corresponding with this second message change rule of first sip message, read out a certain variate-value, judge whether this variate-value comprises the character string of appointment in second effective term (or numerical value), judge promptly whether first sip message satisfies this second effective term of this second message change rule, if do not satisfy, illustrate that then this second message change rule does not match with first sip message, then should be with its deletion from the set of second message change rule.
Need to prove in addition, not necessarily must comprise second effective term in the message change rule, if for a certain message header field in the sip message, between IMS network and NGN network, all there are differences, then in corresponding message change rule, can not need to define second effective term with this message header field.
Thus, in the present embodiment, after the ISC gateway device obtains the set of second message change rule in inquiry, effective term according to second message change rule, can inquire first message change rule with first sip message coupling from all second message change rules, the effective term of this first message change rule is to be satisfied with first sip message that the ISC gateway device receives.And the ISC gateway device through twice query manipulation after, from the set of default message change rule, filtered out all and the unmatched message change of first sip message rule, selected the message change rule that obtains just regular at last for real first message change that meets first sip message and can be used for first sip message is changed.In the embodiment of the invention, first message change rule can be one, also be can many, and second message is changed rule can be one, can also be many.
Need to prove in addition, not necessarily must comprise second effective term in the message change rule, if for a certain message header field in the sip message, between IMS network and NGN network, all there are differences, then in corresponding message change rule, can not need to define second effective term with this message header field.
Thus, the ISC gateway device through twice query manipulation after, from the set of default message change rule, filtered out all and the unmatched message change of first sip message rule, selected the message change rule that obtains just regular at last for real first message change that meets first sip message and can be used for first sip message is changed.
If the ISC gateway device inquires first message change rule with first sip message coupling, will be according to the operational order of first message that inquires change rule, the message header field or the message body field of first sip message corresponding with the message first place that defines in this first message change rule are changed.Particularly, all define concrete operational order in each message change rule, be used to indicate of the concrete change operation of ISC gateway device to first sip message, and in each message change rule also definition the message first place is arranged, be used for indicating the ISC gateway device to which message header field of first sip message that receives to change, or should change the message body field according to this message change rule according to this message change rule.Need to prove, because in Session Initiation Protocol, the message body name that the message body field of sip message is not corresponding, therefore, can be whole message body Field Definition one message body name in advance, be about to the message body field and regard the combination of self-defining message body name and message body value (this message body value part is the content of real message body field) as, accordingly, the message first place that defines in the message change rule at the message body field also should be self-defining message body name, thus, just can realize change to the message body field of sip message.
Particularly, the operational order that defines in the message change rule comprises read operation, retouching operation, increase operation and deletion action, and for different operations, the concrete change step to first sip message that the ISC gateway device is carried out is also different.In the time of below will instructing to corresponding each different operating of ISC gateway device, the operation that should carry out is described in detail, and only the change to the message header field is described at the ISC gateway device in following explanation, change for the message body field, just need a self-defined message body name, other part is without any difference.
When the operational order of definition is read operation, the ISC gateway device does not need first sip message is carried out concrete change, and some or several variablees that its need extract according to the From Template that defines in the message change rule in the field value of corresponding message header field get final product.From Template herein is meant and defines in the message change rule, meets the template of form of the Session Initiation Protocol regulation of transmit leg network, is the ISC gateway device extracts variable time institute foundation in the field of the corresponding message from first sip message template.The ISC gateway device carries out the extraction of variable in strict accordance with the From Template in the message change rule, may comprise numerical value or character string in the variable that extracts;
Need to prove, the ISC gateway device is not the change that is intended to it to the read operation of first sip message, the purpose of such message change rule is to extract the value that a part needs from certain message header field of first sip message, form a variable, thus make the ISC gateway device can after message change rule in can use this variable.For example: with the effective term of this variable as another message change rule, have only after having comprised a certain numerical value or character string in this variable, this message change rule just comes into force; Perhaps, extract this variable and be used for change another message header field.Concrete can be provided with in message change rule as required.
When the operational order of definition is retouching operation, the ISC gateway device will be according to the From Template in this message change rule, from a field value of the corresponding message header field of this message change rule, extract one or more variablees, then according to the purpose template in this message change rule, a new field value that the set of variables of needs is synthesized this message header field, and in the process of extracting variable and union variable, should carry out in strict accordance with the form that defines in From Template and the purpose template.Purpose template herein is meant and defines in the message change rule, the template of form that meets the Session Initiation Protocol regulation of recipient's network, be the template of ISC gateway device in the new message header field time institute foundation that generates first sip message, the ISC gateway device will generate the final value of message header field according to this template.
When the operational order of definition is operated for increasing, this message change rule is intended to increase a message header field in first sip message, at this moment, the ISC gateway device will generate the corresponding new message header field in message first place with this message change rule according to the purpose template in this message change rule.Refer to that particularly a field value of the new information head field of synthetic this message header field of set of variables that extracts in other the message change rule with needs is perhaps with the field value of appointment in the purpose template field value as the new message header field that increases.Promptly change in the rule for the message that increases operation at operational order, the From Template part can define, and it is empty template that From Template can also be set.
When the operational order of definition is deletion action, the ISC gateway device will directly be deleted the corresponding message header field of this message change rule.
More than four kinds of operational orders comprised all situations that first sip message is changed, the ISC gateway is after changing first sip message according to all first message change rules that inquire, with obtaining meeting the sip message of recipient's Session Initiation Protocol standard, be referred to as second sip message
After the change of first sip message that first network element sends through the ISC gateway device, the new sip message that obtains is second sip message, this second sip message is the sip message that meets the Session Initiation Protocol standard of second network element, the ISC gateway device sends to second network element with this second sip message, has then finished all operating processes to the change and the forwarding of first sip message.
The next generation network of the embodiment of the invention and the communication means of IP Multimedia System, in the transport process by the sip message between NGNAS and IMS core net, various information according to the sip message that receives are inquired about the message change rule that matches, and according to the message change rule that inquires, mode by template configuration is changed each message header field of sip message, and the sip message after will changing is transmitted to recipient's network, IMS and the difference of NGN on the Session Initiation Protocol standard between parts in repeating process, have been shielded, need not to revise on the basis of business realizing, realized the complete compatibility of NGN and IMS, the business that makes NGN provide can be applicable to fixed line and mobile phone simultaneously.
Further, to the choosing of message change rule, and to the operation of the change of sip message, the message that the ISC gateway can be adopted change rule definition is following form according to ISC gateway device in the foregoing description:
Rule name | direction | operation | message header | From Template | the purpose template | the effective term expression formula
In above-mentioned form, message to be changed rule be divided into seven parts, each part has all been represented specific implication, and its specific effect is arranged, wherein:
Rule name partly is a self-defining character string arbitrarily, can think name to message change rule, for example, it can be " rule1 ", " rule2 " etc., the effect of rule name part is to be all unified identification titles of message change rule definition, so that the ISC gateway device is to the identification of such message change rule;
Direction partly represent this message change rule at the change direction, promptly this message change rule is at the change defined rule of IMS network to the sip message of NGN network transmission, still at the defined rule of change of the sip message of opposite sending direction, it can be defined as one group of numerical value.For example, this part can be defined as: " 0:ims-〉ngn comes into force; 1:ngn-〉ims comes into force; The 2:all both direction all comes into force ", the effect of direction part is to make the change direction of ISC gateway device according to every message change rule definition, the message change rule of the sip message of the change of selecting to suit the requirements;
Operation part is represented the concrete change operation of this message change rule to sip message, comprises and read, revise, increase or delete four kinds that it can be defined as one group of character or one group of concrete numerical value, the operation that different characters or numerical value are corresponding different.For example, it can be defined as: " R: read; M: revise; A: increase; D: deletion ".The effect of operation part is to make the ISC gateway device in the process that first sip message is changed, and can carry out different change operations to the message header field of sip message according to the different definition of operation part;
Message header partly defined this message change rule at the field name of message header field, a because message header field of a concrete corresponding sip message of message change rule, therefore at the ISC gateway device in the process that sip message is changed, need that to assign to understand this message change rule be change at which message header field by reading message header, operate thereby could carry out concrete change to this message header field.Particularly, this message header is divided into a field name of each concrete message header field, for example " Request-Uri ", " Route ", " From " etc.Need to prove in addition, if need make amendment to the message body field of sip message, then need to be the self-defined message body name of message body field, and change in the rule at the message of message body field change accordingly, this part then is self-defining message body name;
From Template partly is a template of the corresponding message header field of first sip message being extracted variate-value time institute foundation, the ISC gateway device will be according to this template, the part value of extracting corresponding message header field or message body field is as variable, specifically refer to from a field value of message header field, extract part value, perhaps from the message body field, extract part value as variable.For a field value part of message header field, it also includes different intervals and meets except comprising a plurality of numerical value between each numerical value, for example "; ", ": ", "+" etc.; therefore; the From Template part must be according to the needs of change; the form that in the Session Initiation Protocol of transmit leg, defines according to this message header field; identify each variate-value accordingly; thus make the ISC gateway device when extracting each variable, only extract numerical part, perhaps extract together with space character;
For example, suppose that the regular From Template of certain message change partly is＜sip:[[tr1]]: [[tr2]]; [[tr3]], wherein, " [[" is the beginning label of the variable of extraction, "]] " is for extracting the end mark of variable, if a field value of the message header field of this From Template correspondence is＜sip:192.168.246.171:5060; Lr 〉, therefore, strictly the variable that extracts according to From Template is: [[tr1]]=192.168.246.171, [[tr2]]=5060, [[tr3]]=lr 〉, thereby make when extracting three variablees, removed the symbol ": " between first variable and second variable according to this From Template, and removed symbol between second variable and the 3rd variable "; ".
The purpose template part is the template in a field value time institute foundation of the message header field that generates new sip message, and the ISC gateway device will generate the final value of message header field or message body field according to this template.With the same in the From Template, in the purpose template, also can between each variable, add new interval and meet, with the form of stipulating in the Session Initiation Protocol that meets the recipient according to the actual needs;
For example, suppose extract three variablees [[tr1]], [[tr2]] and [[tr3]] according to a last From Template after, the purpose template part of this message change rule is＜sip:[[tr1]]: [[ru2]]; [[tr3]], wherein, [[tr1]] and [[tr3]] variable for extracting according to From Template is respectively [[tr1]]=192.168.246.171, [[tr3]]=lr 〉, and [[ru2]] is according to another message change rule, extracts from another message header field and obtains variable, and its value is: [[ru2]]=8092, so, according to the purpose template, will obtain a final field value of this message header field, for＜sip:192.168.246.171:8092; Lr 〉.
Effective term expression formula part is made up of one or more expression formulas, be used for to the ISC gateway device provide judge this message change rule whether with the foundation of the sip message coupling that receives, when expression formula is all set up, when being its value for true, represent this message change rule and the sip message coupling that receives, otherwise do not match.For example, the effective term expression formula of supposing certain message change rule is the (﹠amp of [[method]]～equal～INVITE); ﹠amp; ([[3]]～CONTAIN～tag=), the meaning of this conditional expression is called INVITE for the requesting method name when the sip message that receive, and the variable in this sip message " [[3]] " is when comprising the character string of " tag=", this message change taking effect rules.
Seven parts by the different implications of the above-mentioned representative of definition in message change rule, the ISC gateway can be according to the concrete implication of various piece representative, in the set of message change rule, choose, and sip message is carried out complete change for the message change rule of the sip message coupling that receives.And the concrete form of above-mentioned message change rule; and the concrete definition of each several part; it is an execution mode of comparatively optimizing of the embodiment of the invention; and on the basis of having realized the embodiment of the invention; resulting extended formatting and definition to message change rule, the scope that also belongs to the present invention and protected.
Fig. 3 is the flow chart of the communication means of another next generation network of the embodiment of the invention and IP Multimedia System, and as shown in Figure 3, this method comprises:
Step 300, IMS core net send INVITE to the ISC gateway;
Step 301, ISC gateway are responded 100Trying Temporary Response message to the IMS core net;
Particularly, this step is the optional step of the embodiment of the invention.
Step 302, the ISC gateway is changed INVITE according to message change rule that inquire and this INVITE coupling;
The ISC gateway is to the inquiry of message change rule, and in embodiment two, be described in detail according to the concrete steps of the message that inquires change rule to the change of sip message, in the present embodiment, mainly illustrate the ISC gateway to of the change of IMS core net, and suppose that the Method type of this message is INVITE to the sip message of NGN application server sending direction.Suppose from default message change regular collection, to inquire, with first message change rule of first sip message coupling be that following four message are changed regular:
rule1|0|M|From|<sip：[[f1]]+[[f2]]|<sip：[[f1]][[f2]]|[[method]]～equl～INVITE；
rule1|0|M|P-Asserted-Identity|<sip：+[[psi1]]|<sip：[[psi1]]|[[method]]～equl～INVITE；
rule1|0|M|Contact|<sip：+[[c1]]|<sip：[[c1]]|[[method]]～equl～INVITE；
rule1|0|M|Request-Uri|[[ru11]]+[[ru12]]|[[ru11]][[ru12]]|[[method]]～equl～INVITE
In the present embodiment, for above-mentioned four message change rule is distinguished, in following explaining, will be rule one, rule two, rule three and rule four according to the above-mentioned branch that puts in order this four message change rules that have another name called.
At first, can learn that from the message header part of above-mentioned four message change rule these four message change rules are respectively the changes at the message header field of a field of INVITE " From ", " P-Asserted-Identity " by name, " Contact " and " Request-Uri "; And they at the change direction all be " 0 ", promptly at of the change of IMS network to the NGN network; The operational order of these four message change rules all is " M " simultaneously, promptly is the retouching operation to four message header fields of INVITE; In addition, its effective term all is " [[method]]～equl～INVITE ", and the requesting method name of the sip message that promptly receives is called INVITE.
Particularly, From Template from regular one as can be seen, this message change rule is to extract [[f1]] and [[f2]] two variablees in the field value for the message header field of field " From " by name from the beginning, and the interval of having removed simultaneously between two variablees meets "+", and from the purpose template as can be seen, a new field value that generates still is made up of variable [[f1]] and [[f2]], just meets without any the interval between two variablees in the purpose template.Therefore, the purpose of this message change rule is that with in the INVITE symbol "+" between the variable of a field value of the message header field of a field " From " by name is removed.
Equally, rule two, rule three and rule four purpose also for similarly with in the INVITE, a field is called symbol "+" removal between the variable of a field value of message header field of " P-Asserted-Identity ", " Contact " and " Request-Uri ".
Step 303, the INVITE after the ISC gateway will be changed sends to the NGN application server;
Step 304, NGN application server are responded 100Trying Temporary Response message to the ISC gateway.
Particularly, this step also is the optional step in the embodiment of the invention.
So far, the ISC gateway has just been finished the process that the once complete sip message to send to the NGN application server from the IMS core net is changed and transmitted, and operation by this change and forwarding, make the IMS network send to the sip message of NGN network, after through change, the Session Initiation Protocol standard that can meet the NGN network
Fig. 4 is the flow chart of the communication means of another next generation network of the embodiment of the invention and IP Multimedia System, and as shown in Figure 4, this method comprises:
Step 400, the NGN application server sends INVITE to the IMS core net;
Step 401, ISC gateway are responded 100Trying Temporary Response message to the NGN application server;
Particularly, this step is the optional step in the embodiment of the invention.
Step 402, the ISC gateway is changed INVITE according to message change rule that inquire and this INVITE coupling;
In the present embodiment, mainly illustrate the ISC gateway, and suppose that the Method type of this message is INVITE of the change of NGN application server to the sip message of IMS core net sending direction.Suppose from default message change regular collection, to inquire, with first message change rule of first sip message coupling be that following five message are changed regular:
rule1|2|R|Route|[[route]]|NULL|[[method]]～equl～INVITE；
rule1|1|A|Top-Route|NULL|<sip：192.168.246.136：5060；lr>|([[method]]～equl～INVITE)&&([[route]]～equl～)；
rule1|1|M|Request-Uri|sip：[[ru1]]|sip：+[[ru1]]|[[method]]～equl～INVITE；
rule1|1|R|From|<[[f11]]>[[f12]]|NULL|[[method]]～equl～INVITE；
rule1|1|A|P-Asserted-Identity|NULL|<[[f11]]>|[[method]]～equl～INVITE；
Equally, in the present embodiment, for above-mentioned five message change rule is distinguished, in following explaining, will be rule one, rule two, rule three, rule four and rule five according to the above-mentioned branch that puts in order this five message change rules that have another name called.
At first, can learn that from the message header part of above-mentioned five message change rule these five message change rules are respectively the changes at the message header field of a field of INVITE " Route ", " Top-Route " by name, " Request-Uri ", " From " and " P-Asserted-Identity "; And they at the change direction be " 1 " or " 2 ", promptly, perhaps all be suitable for for both direction at the change of NGN network to IMS network; Simultaneously operational orders of these five message change rules are respectively " R ", " A ", " M ", " R ", " A ", promptly respectively to the operation of reading, increase, revise, reading and increasing of five message header fields of INVITE; In addition, its effective term all comprises " [[method]]～equl～INVITE ", the requesting method name that is applicable to that is its qualification is called the sip message of INVITE, and the effective term that has also comprised " [[route]]～equl～" in the rule two, then delegate rules two is applicable in the sip message that does not comprise [[route]] variable, and should [[route]] variable be that rule one reads out, a complete field value of the message header field of a field " Route " by name.
Particularly, rule one is in the INVITE, the read operation of the message header field of field " Route " by name, and as can be seen from its From Template, this message change rule is to extract [[route]] variable in the field value for the message header field of field " Route " by name from the beginning, and should [[route]] variable have comprised whole field value of " Route " message header field.And in rule two, then having used [[route]] variable to come whether this message change rule come into force judges, when [[route]] variable is for sky in judging the INVITE that receives, then in INVITE, should increase the message header field of a new field " Top-Route " by name, a field value of this message header field be "＜sip:192.168.246.136:5060; Lr〉".
In addition, the purpose of rule three is with in the INVITE, and the symbol "+" before [[ru1]] variable of a field value of the message header field of a field " Request-Uri " by name is removed.
Extract [[f11]] and [[f12]] variable in the field value that regular four, regular five purpose then is the from the beginning message header field of field " From " by name, and should increase the message header field that a new field is called " P-Asserted-Identity " in INVITE, and a field value of this message header field is the value of [[f11]] variable.
Step 403, the INVITE after the ISC gateway will be changed sends to the IMS core net;
Step 404, IMS core net are responded 100Trying Temporary Response message to the ISC gateway.
Particularly, this step also is the optional step in the embodiment of the invention.
So far, the ISC gateway has just been finished the process that the once complete sip message to send to the IMS core net from the NGN application server is changed and transmitted, and change and forwarding operation by the ISC gateway, make the NGN network send to the sip message of IMS network, after through change, the Session Initiation Protocol standard that also can meet the NGN network
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Fig. 5 is the structural representation of a kind of IP multimedia service control gateway of embodiment of the invention equipment, and as shown in Figure 5, the ISC gateway device of present embodiment comprises:
Message change rule query unit 1 is used to receive first session initiation message that first network element sends, and inquires about first message change rule with described first session initiation message coupling from default message change regular collection;
First network element wherein is the NGN application server, and second network element is the IMS core net; Perhaps, first network element is the IMS core network, and second network element is the NGN application server.
Wherein, the related message of present embodiment change regular collection, NGN application server, IMS core net and the related concrete course of work, the related content that can disclose with reference to above-mentioned Fig. 3 and the related embodiment of Fig. 4 does not repeat them here.
The IP multimedia service control gateway equipment of the embodiment of the invention, by being added between NGN application server and the IMS core net, and by in the transport process of sip message, after changing, the sip message that transmit leg is sent is transmitted to the recipient again, make it to meet recipient's Session Initiation Protocol standard, thereby in the process of change and forwarding, IMS and the difference of NGN on the Session Initiation Protocol standard have been shielded, need not to revise on the basis of business realizing, realized the complete compatibility of NGN and IMS, the business that makes NGN provide can be applicable to fixed line and mobile phone simultaneously.
Fig. 6 is the structural representation of the another kind of IP multimedia service control gateway of embodiment of the invention equipment, and as shown in Figure 6, on the basis of a last embodiment, further, in the present embodiment, the message change rule query unit 1 in the ISC gateway device also comprises:
First message change rule query subelement 11, be used for determining the sending direction of described first session initiation message, from described default message change regular collection, inquire about the set of changing rule with second message of described sending direction coupling according to the source address information of described first session initiation message;
Second message change rule query subelement 12, be connected with described first message change rule query subelement 11, be used for effective term according to described second message change, inquiry first message change rule from the set of described second message change rule is so that described first session initiation message satisfies the effective term of described first message change rule.
Wherein said effective term comprises first effective term, the effective term that described first session initiation message satisfies described first message change rule comprises that the requesting method of described first session initiation message should be the session of appointment in described first effective term and initiates requesting method.
Further, described effective term also comprises second effective term, the effective term that described first session initiation message satisfies described first message change rule comprises that the message header field of described first session initiation message or message body field comprise the numerical value or the character string of appointment in described second effective term.
Further, in the present embodiment, the message change unit 2 in the ISC gateway device also comprises:
Message reads subelement 21, be used for when described operational order is read operation, according to the From Template of described first message change rule, in the message header field or message body field of the regular message first place correspondence of described first message change, extract one or more variablees;
Message increases subelement 23, is used for when described operational order is operated for increasing, and according to the purpose template of described first message change rule, generates and the regular corresponding new message header field in message first place of described first message change;
Can call mutually between 4 unit of message change unit, can message call read the content of subelement 21 such as: message modification subelement 22, perhaps message modification subelement 22 can message call increases the content of subelement 23.
Wherein, the related message of present embodiment change regular collection, NGN application server, IMS core net and the related concrete course of work, the related content that can disclose with reference to above-mentioned Fig. 3 and the related embodiment of Fig. 4 does not repeat them here.
The IP multimedia service control gateway equipment of the embodiment of the invention, by being added between NGN application server and the IMS core net, and by in the transport process of sip message, various information according to the sip message that receives are inquired about the message change rule that matches, and according to the message change rule that inquires, mode by template configuration is changed each message header field of sip message, and the sip message after will changing is transmitted to recipient's network, IMS and the difference of NGN on the Session Initiation Protocol standard between parts in repeating process, have been shielded, need not to revise on the basis of business realizing, realized the complete compatibility of NGN and IMS, the business that makes NGN provide can be applicable to fixed line and mobile phone simultaneously.
Through the above description of the embodiments, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential common hardware, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium that can read, floppy disk as computer, hard disk or CD etc., comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (14)
1. the communication means of next generation network and IP Multimedia System is characterized in that, comprising:
Receive first session initiation message that first network element sends, first message change rule of inquiry and described first session initiation message coupling from default message change regular collection;
According to described first message change rule described first session initiation message is changed to second session initiation message of the session initiation protocol standard that meets second network element, and described second session initiation message is sent to described second network element.
2. the communication means of next generation network according to claim 1 and IP Multimedia System is characterized in that,
Described first network element is the next generation network application server, and described second network element is the IP Multimedia System core net; Perhaps, described first network element is the IP Multimedia System core net, and described second network element is the next generation network application server.
3. the communication means of next generation network according to claim 1 and 2 and IP Multimedia System is characterized in that, first message change rule of inquiry and described first session initiation message coupling from default message change regular collection comprises:
Determine the sending direction of described first session initiation message according to the source address information of described first session initiation message, the set of inquiry and second message change rule of described sending direction coupling from described default message change regular collection;
According to the effective term of described second message change rule, inquiry first message change rule from the set of described second message change rule is so that described first session initiation message satisfies the effective term of described first message change rule.
4. the communication means of next generation network according to claim 3 and IP Multimedia System is characterized in that,
Described effective term comprises first effective term;
The effective term that described first session initiation message satisfies described first message change rule comprises that the requesting method of described first session initiation message is that requesting method is initiated in the session of appointment in described first effective term.
5. the communication means of next generation network according to claim 4 and IP Multimedia System is characterized in that,
Described effective term also comprises second effective term;
The effective term that described first session initiation message satisfies described first message change rule comprises that the message header field of described first session initiation message or message body field comprise the numerical value or the character string of appointment in described second effective term.
6. according to the communication means of claim 4 or 5 described next generation networks and IP Multimedia System, it is characterized in that, describedly second session initiation message that described first session initiation message changes to the session initiation protocol standard that meets second network element is specially according to described first message change rule:
According to the operational order of described first message change rule, the message header field or the message body field of first session initiation message corresponding with the message first place of described first message change rule are changed.
7. the communication means of next generation network according to claim 6 and IP Multimedia System, it is characterized in that, described operational order according to described first message change rule, first message is changed the message header field or the message body field of first session initiation message of regular message first place correspondence and is changed, comprising:
When described operational order is read operation,, in the message header field or message body field of the regular message first place correspondence of described first message change, extract one or more variablees according to the From Template of described first message change rule;
When described operational order is retouching operation, From Template according to described first message change rule, in the message header field or message body field of the regular message first place correspondence of described first message change, extract one or more variablees, and, be combined into new message header field corresponding or new message body field with the message first place of described first message change rule with the purpose template of described variable according to described first message change rule;
When described operational order is operated for increasing,, generate and the regular corresponding new message header field in message first place of described first message change according to the purpose template of described first message change rule;
When described operational order is deletion action, the message header field deletion in described first session initiation message that will be corresponding with the message first place of described first message change rule.
8. an IP multimedia service control gateway equipment is characterized in that, comprising:
Message change rule query unit is used to receive first session initiation message that first network element sends, and inquires about first message change rule with described first session initiation message coupling from default message change regular collection;
Message change unit, be connected with described message change rule query unit, be used for described first session initiation message being changed to second session initiation message of the session initiation protocol standard that meets second network element, and described second session initiation message is sent to described second network element according to described first message change rule.
9. IP multimedia service control gateway equipment according to claim 8 is characterized in that,
Described first network element is the next generation network application server, and described second network element is the IP Multimedia System core net; Perhaps, described first network element is the IP Multimedia System core net, and described second network element is the next generation network application server.
10. according to Claim 8 or 9 described IP multimedia service control gateway equipment, it is characterized in that described message change rule query unit comprises:
First message change rule query subelement, be used for determining the sending direction of described first session initiation message, from described default message change regular collection, inquire about the set of changing rule with second message of described sending direction coupling according to the source address information of described first session initiation message;
Second message change rule query subelement, be connected with described first message change rule query subelement, be used for effective term according to described second message change rule, inquiry first message change rule from the set of described second message change rule is so that described first session initiation message satisfies the effective term of described first message change rule.
11. IP multimedia service control gateway equipment according to claim 10 is characterized in that,
Described effective term comprises first effective term;
The effective term that described first session initiation message satisfies described first message change rule comprises that the requesting method of described first session initiation message is that requesting method is initiated in the session of appointment in described first effective term.
12. IP multimedia service control gateway equipment according to claim 11 is characterized in that,
Described effective term also comprises second effective term;
The effective term that described first session initiation message satisfies described first message change rule comprises that the message header field of described first session initiation message or message body field comprise the numerical value or the character string of appointment in described second effective term.
13. according to Claim 8 or 11 or 12 arbitrary described IP multimedia service control gateway equipment, it is characterized in that,
Described message change unit also is used for the operational order according to described first message change rule, and the message header field or the message body field of first session initiation message corresponding with the message first place of described first message change rule are changed.
14., it is characterized in that described message change unit comprises according to claim 11 or 12 described IP multimedia service control gateway equipment:
Message reads subelement, be used for when described operational order is read operation, according to the From Template of described first message change rule, in the message header field or message body field of the regular message first place correspondence of described first message change, extract one or more variablees;
The message modification subelement, be used for when described operational order is retouching operation, From Template according to described first message change rule, in the message header field or message body field of the regular message first place correspondence of described first message change, extract one or more variablees, and, be combined into new message header field corresponding or new message body field with the message first place of described first message change rule with the purpose template of described variable according to described first message change rule;
Message increases subelement, is used for when described operational order is operated for increasing, and according to the purpose template of described first message change rule, generates and the regular corresponding new message header field in message first place of described first message change;
Message deletion subelement is used for when described operational order is deletion, the message header field deletion in described first session initiation message that will be corresponding with the message first place of described first message change rule.
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