CN101997852B - 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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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 present invention relates to network communications technology field, relates in particular to 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 it is paid close attention to more and more widely in the advantage aspect the network integration, become gradually the developing direction of following core network, become the platform of generally acknowledged multimedia, Service 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 the terminal for access IMS network also requires to support the SIP interface.And for fixed network NGN, although it is also for realizing based on Session Initiation Protocol, but because fixed network is different from the concrete business that the mobile network provides, and the diversity due to the NGN system, the parts of SIP in NGN network carrying may not necessarily with the IMS network in the corresponding component intercommunication, may have some difference in realization, this just becomes and hinders the large 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 prior art, but the implementation of prior art scheme is all mainly by revising NGN application server (Application Servicer, hereinafter to be referred as AS) complete adaptive with the IMS network, NGN AS is transformed into the operation parts that satisfy IMS, by the modification of NGN corresponding component being completed between the two adaptive.
The inventor finds in realizing process of the present invention: although in prior art, the mode of this modification parts makes NGN can be successfully compatible with IMS, 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, the NGN that namely realizes in this way and the fusion of IMS, make both mutual couplings too strong, thereby hindered the development of other business of NGN.Therefore, how do not revising on the basis of self parts at the NGN network, realizing the fusion with the low coupling of IMS network, just becoming one of study hotspot in Network Convergence Technology now.
Summary of the invention
The embodiment of the present invention provides communication means and the equipment of a kind of next generation network and IP Multimedia System, only have and just can complete adaptive with the IMS network by self parts is modified in order to solve NGN network in 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 present invention provides the communication means of a kind of next generation network and IP Multimedia System, comprising:
Receive the first session initiation message that the first network element sends, the first message change rule of inquiry and described the first session initiation message coupling from default message change regular collection;
According to described the first message change rule, described the first session initiation message is changed to the second session initiation message of the session initiation protocol standard that meets the second network element, and described the second session initiation message is sent to described the second network element.
The embodiment of the present invention provides a kind of IP multimedia service to control gateway device, comprising:
Message change rule query unit is used for receiving the first session initiation message that the first network element sends, and inquiry is changed rule with the first message of described the first session initiation message coupling from the message change regular collection of presetting;
The message changing unit, be connected with described message change rule query unit, be used for according to described the first message change rule, described the first session initiation message being changed to the second session initiation message of the session initiation protocol standard that meets the second network element, and described the second session initiation message is sent to described the second network element.
the next generation network of the embodiment of the present invention and the communication means of IP Multimedia System and equipment, by add the gateway device that capable of dynamic is revised sip message between NGN AS and IMS core net, this gateway device can be in the transport process of sip message, after being changed, the sip message of transmit leg transmission is transmitted to again the recipient, make it to meet recipient's Session Initiation Protocol standard, thereby IMS and the difference of NGN on the Session Initiation Protocol standard have been shielded in the process of change and forwarding, need not to revise on the basis of business realizing, realized the complete compatibility of NGN and IMS, make the business that NGN provides to be applicable to simultaneously in fixed line and mobile phone.
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 present invention and IP Multimedia System;
Fig. 2 is the flow chart of the communication means of the another kind of next generation network of the embodiment of the present 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 present 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 present invention and IP Multimedia System;
Fig. 5 is the structural representation that a kind of IP multimedia service of the embodiment of the present invention is controlled gateway device;
Fig. 6 is the structural representation that the another kind of IP multimedia service of the embodiment of the present invention is controlled gateway device.
Embodiment
Further illustrate the technical scheme of the embodiment of the present 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 multimedia, Service control and the network integration of generally acknowledging, 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 some problems in the compatible NGN of IMS network security.Based on Session Initiation Protocol, so it requires its network of access also must support the SIP interface due to IMS, although and the NGN network be also 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: do not comprise P-Asserted-Identity field from the sip message that the NGN network sends, and comprise this field in IMS; In addition, although some sip message head fields have definition in NGN He in 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 method and apparatus of the next generation network access IP Multimedia System of the embodiment of the present invention, control (IMS Service control by the IP multimedia service that offers each application network of IMS at NGN application server and IMS core network, hereinafter to be referred as ISC) between 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, make the sip message of wherein side's transmission after the change through message change rule, can satisfy the opposing party's Session Initiation Protocol standard-required, thereby the fusion that realizes two kinds of networks is with compatible.Need to prove, the ISC interface of indication is the unified interface that the IMS core network offers each application network of IMS herein, this ISC interface is supported Session Initiation Protocol, for the sip application server of each network access IMS network provides a good channel, sip application server comprises 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 present invention and IP Multimedia System, and as shown in Figure 1, this method comprises:
Step 100 receives the first session initiation message that the first network element sends, and inquires about the first message change rule with the first session initiation message coupling from default message change regular collection;
In the embodiment of the present invention, the first network element and the second network element refer to respectively NGN application server and IMS core net, perhaps refer to respectively IMS core net and NGN application server.The ISC gateway device is undertaken adaptive dynamically by the sip message to transmission between both, namely when forwarding, the sip message of transmission is changed, make the sip message of wherein side's transmission 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 by ISC interface, realize the compatibility with the IMS network.
At first, receive the first sip message of the first network element transmission when the ISC gateway device after, will inquire about the message change rule of mating with this first sip message in default message change regular collection.The set of the default message change rule of indication herein specifically is stored in a memory cell in the ISC gateway device, it is perhaps the database of ISC gateway device self, in this default message change regular collection, all message change rules that the sip message that transmits between NGN AS and 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 the first sip message carries out concrete change operation, the ISC gateway device need to be changed the message change rule of inquiring about in regular collection with this first sip message coupling in message, by the first sip message being carried out extraction and the analysis of relevant information, select the message change rule with this first sip message coupling, thereby could change it with the message change rule that inquires.
Particularly, in embodiments of the present invention, claim the ISC gateway device from the set of default message change rule, all message change rules with the first sip message coupling that finally inquire are the first message change rule.For the first different sip messages, the first message change rule that the ISC gateway device inquires is with different.For some the 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 the first message change rule this first sip message coupling; And for some the first sip message, it may need the field changed less, and is that therefore inquire also fewer with the first message change fuzzy rules this first sip message coupling; And for some the first sip message, the Session Initiation Protocol standard that it may need not to modify and just can meet the recipient, it will be zero that the first message with this first sip message coupling that therefore inquires is changed fuzzy rules.Concrete Query Result situation is specifically relevant with the composition of the field of the first sip message.
Step 101 changes to the second session initiation message of the session initiation protocol standard that meets the second network element according to the first message change rule with the first session initiation message, and the second session initiation message is sent to the second network element.
If the ISC gateway device inquires the first message change rule with the first sip message coupling that receives, 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 the first sip message according to the 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 the first sip message is changed, amended the first sip message is sent to the recipient of this first sip message, namely the second network element gets final product again.
the embodiment of the present invention provides the communication means of a kind of next generation network and IP Multimedia System, in transport process by the sip message between NGN AS and IMS core net, after being changed, the sip message of transmit leg transmission is transmitted to again the recipient, make it to meet recipient's Session Initiation Protocol standard, thereby IMS and the difference of NGN on the Session Initiation Protocol standard have been shielded in the process 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, make the business that NGN provides to be applicable to simultaneously fixed line and mobile phone.
Fig. 2 is the flow chart of the communication means of the another kind of next generation network of the embodiment of the present invention and IP Multimedia System, and as shown in Figure 2, this method comprises:
In the present embodiment, the first network element can be NGN AS or IMS core net, and corresponding the 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 for the Session Initiation Protocol difference between NGN network and IMS network have been comprised, for each message change rule, all define the attribute of the direction that comes into force, namely this message change rule should come into force when the IMS network sends sip message at the NGN network, or 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 the 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 the first sip message, namely filter out in the set of default message change rule from embodiment as corresponding in Fig. 1 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 the first sip message be the second message change rule, namely pass through this time query manipulation of ISC gateway device, the set of the message that obtains change rule is the set of the second message change rule.
Particularly, each message change rule of storing in the set of default message change rule can define this attribute that a flag represents its change direction.For instance, can be defined as: when the value of this flag is 0, represent that this message change rule sends to the change of sip message of NGN network to the IMS network effective; When the value of this flag is 1, represent that this message change rule sends to the change of sip message of ISM network to the NGN network effective; And when the value of this flag is 2, represent that this message change rule is all effective for the change of the sip message of both direction.The implication of each numerical value representative can arrange 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 that represents this first sip message from the first sip message after receiving the first sip message, this source address information is identified, determined the sending direction of the 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 together information in sip message 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 IMS network, if the source address information of therefore extracting from the first sip message this moment is specially the address of NGN network, the sending direction that can determine this first sip message is the NGN network to IMS network, on the contrary, if the source address information of extracting from the first sip message this moment is specially the address of IMS network, the sending direction that can determine this first sip message is that the IMS network is to the NGN network.
After the ISC gateway device has been determined the sending direction of the first sip message, namely 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 the second message change rule.For example, when the source address information that extracts from the 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 flag of representative change direction attribute is the set that 0 or 2 message change rule forms the second message change rule; And the source address information that extracts from the 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 flag of representative change direction attribute is the set that 1 or 2 message change rule forms the second message change rule.
For each sip message, its message format is followed Session Initiation Protocol, 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 which kind of SIP requesting method each sip message specifically belongs to; The message header part has comprised one or more message header fields, and each message header field is divided into a field name and field value two parts; The message body part is the entity content part of this sip message, is comprised 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, message change rule mainly for be the change of each message header field of sip message, be the concrete corresponding message header field of each message change rule, and for the sip message head field that each there are differences in NGN network and IMS network, have corresponding message change rule to support its change.And according to the 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 needs change, therefore before the ISC gateway device is changed the sip message that receives, need to each message header field that this sip message comprises be judged, judge whether it needs the operation of changing.In the present embodiment, can realize by the one or more effective terms of definition in message change rule the operation of concrete judgement.In message change rule definition effective term, specifically certain message header field of sip message or sip message limited, when only having the message header field of sip message self or sip message to satisfy the effective term that limits in message change rule, this message change rule is only the message change rule with this sip message coupling.
therefore, the ISC gateway device is being changed the judgement of direction to the first sip message that receives, filter out and the unmatched message change of the change direction of the first sip message rule, after obtaining the set of the second message change, also need whether the effective term of the second all message change rules is set up and judge, filter out invalid the second message change rule of effective term from the set of the second message change rule, all message change rules that obtain at last are the first message change rule, and the effective term of all the first message change rules is to be satisfied with the first sip message of receiving.
Particularly, in all message change rules, all defined effective term, comprising the first effective term, be used for the SIP requesting method of sip message is limited, be specially limit this message change rule institute for be the change that belongs to the sip message of which kind of SIP requesting method, namely define in this first effective term this message change regular for the requesting method of sip message be the SIP requesting method of an appointment.Due in Session Initiation Protocol, defined altogether six kinds of SIP requesting methods of sip message, 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 the first sip message that receives, the ISC gateway device is after the set that inquires the second message change rule, should extract requesting method information from this first sip message, whether the requesting method that judges the first sip message conforms to the SIP requesting method of appointment in the first effective term of the second message change rule, judge namely whether the first sip message satisfies the first effective term of each the second message change rule, and filter out thus in the set of the second change message rule and unmatched the second message change rule of the requesting method information of the first sip message.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 the first sip message is " INVITE ".If the effective term of a certain the second message change rule is this qualified expression, and the requesting method information that the ISC gateway device extracts from the first sip message does not satisfy this conditional expression, the ISC gateway device is thought that this second message change is regular and is not suitable for the first sip message that receives, namely do not mate with the first sip message, should be with this second message change redundant rule elimination from the set of the second message change rule.
Further, for each message change rule, in its defined effective term except comprising the first effective term, can also comprise the 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: for the difference of Session Initiation Protocol between IMS network and NGN network, a certain message header field in sip message is only when having comprised a certain specific numerical value or character string, just need to be modified, like this, need in change rule with this message header Related fields message, define one and represent that this message header field has comprised the second effective term of the character string (or numerical value) of a certain appointment.
Particularly, in the present embodiment, if certain second message is changed in regular effective term except comprising one first effective term, when also comprising second effective term, the ISC gateway device is in the process of inquiry the first message change rule from the set of the second message change rule, satisfy this first effective term even determine the first sip message that receives, the second effective term that also needs whether the first sip message to be satisfied this second message change rule judges.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 the first sip message, read out a certain variate-value, judge whether this variate-value comprises the character string of appointment in the second effective term (or numerical value), judge namely whether the first sip message satisfies this second effective term of this second message change rule, if do not satisfy, illustrate that this second message change rule and the first sip message do not mate, should be with its deletion from the set of the second message change rule.
Need to prove in addition, not necessarily must comprise the second effective term in message change rule, if for a certain message header field in sip message, all there are differences between IMS network and NGN network, in changing rule with this message header Related fields message, can not need to define the second effective term.
Thus, in the present embodiment, after the ISC gateway device obtains the set of the second message change rule in inquiry, effective term according to the second message change rule, can inquire the first message change rule with the first sip message coupling from all second message change rules, the effective term of this first message change rule is to be satisfied with the first sip message that the ISC gateway device receives.And the ISC gateway device through the query manipulation of twice after, from the set of default message change rule, filter out all and the first unmatched message change of sip message rule, selected at last the message change rule that obtains just regular for real the first message change that meets the first sip message and can be used for the first sip message is changed.In the embodiment of the present invention, the first message change rule can be one, be also can many, and the second message is changed rule can be one, can also be many.
Need to prove in addition, not necessarily must comprise the second effective term in message change rule, if for a certain message header field in sip message, all there are differences between IMS network and NGN network, in changing rule with this message header Related fields message, can not need to define the second effective term.
Thus, the ISC gateway device through the query manipulation of twice after, from the set of default message change rule, filter out all and the first unmatched message change of sip message rule, selected at last the message change rule that obtains just regular for real the first message change that meets the first sip message and can be used for the first sip message is changed.
If the ISC gateway device inquires the first message change rule with the first sip message coupling, will be according to the operational order of the first message change rule that inquires, 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, in each message change rule, definition has concrete operational order, be used to indicate the ISC gateway device to the concrete change operation of the first sip message, and in each message change rule also definition the message first place is arranged, being used to indicate the ISC gateway device should to which the message header field in the first sip message that receives change according to this message change rule, or should change the message body field according to this message change rule.Need to prove, due 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, also should be self-defining message body name for the message first place that defines in the message of message body field change rule, thus, just can realize change to the message body field of sip message.
Particularly, the operational order that defines in message change rule comprises read operation, retouching operation, increase operation and deletion action, and for different operations, the concrete change step to the first sip message that the ISC gateway device is carried out is also different.In the time of below will be to corresponding each different operating instruction 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 for 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 the 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 message change rule in a field value of corresponding message header field get final product.From Template herein refers to define in 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 the first sip message template.The ISC gateway device carries out the extraction of variable in strict accordance with the From Template in 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 the 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 the 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, only have 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 for the change to another message header field.Concrete can arrange 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, extract one or more variablees from a field value of message header field corresponding to this message change rule, 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 purpose template.Purpose template herein refers to define in message change rule, the template of form that meets the Session Initiation Protocol regulation of recipient's network, the ISC gateway device in the template of the new message header field time institute foundation that generates the first sip message, the ISC gateway device is according to this template, with the final value of generating messages head field.
When the operational order of definition operates for increasing, this message change rule is intended to increase a message header field in the first sip message, at this moment, the ISC gateway device will be according to the purpose template in this message change rule, generates the new message header field corresponding with this message change regular message first place.Refer to 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.Namely in operational order was changed rule for the message that increases operation, 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 message header field corresponding to this message change rule.
Above four kinds of operational orders have comprised all situations that the first sip message is changed, the ISC gateway is after changing the 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 the second sip message
After the change of the first sip message through the ISC gateway device that the first network element sends, the new sip message that obtains is the second sip message, this second sip message is the sip message that meets the Session Initiation Protocol standard of the second network element, the ISC gateway device sends to the second network element with this second sip message, has completed all operating processes to change and the forwarding of the first sip message.
the next generation network of the embodiment of the present invention and the communication means of IP Multimedia System, in transport process by the sip message between NGNAS and IMS core net, according to the various information of the sip message that receives, the message change rule that matches is inquired about, 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 changing is transmitted to recipient's network, IMS and the difference of NGN on the Session Initiation Protocol standard between parts have been shielded in repeating process, need not to revise on the basis of business realizing, realized the complete compatibility of NGN and IMS, make the business that NGN provides to be applicable to simultaneously fixed line and mobile phone.
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 above-described embodiment:
Rule name | direction | operation | message header | From Template | the purpose template | the effective term expression formula
In above-mentioned form, it is seven parts that message is changed regular partition, and each part has represented specific implication, and its specific effect is arranged, wherein:
Rule name is partly a self-defining character string arbitrarily, can think the 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 for the change direction, namely this message change rule is for the change defined rule of IMS network to the sip message of NGN network transmission, or for 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 ISC gateway device according to the change direction of every message change rule definition, the message change rule of the sip message of the change of selecting to suit the requirements;
Operation part represents that this message change rule to the concrete change operation of sip message, comprises and reads, revises, increases or delete four kinds, and 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 the first sip message is changed, and can according to the different definition of operation part, carry out different change operations to the message header field of sip message;
Message header partly defined this message change rule for the field name of message header field, a message header field due to 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 for 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, such as " Request-Uri ", " Route ", " From " etc.Need to prove in addition, if need to modify to the message body field of sip message, need to be the self-defined message body name of message body field, and change in rule for the message of message body field change accordingly, this part is self-defining message body name;
From Template is partly the first corresponding message header field of sip message to be extracted the template of variate-value time institute foundation, the ISC gateway device will be according to this template, extract the part value of corresponding message header field or message body field as variable, specifically refer to extract part value from a field value of message header field, perhaps extract part value as variable from the message body field.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 defines in the Session Initiation Protocol of transmit leg according to this message header field; identify accordingly each variate-value; 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 is partly＜sip:[[tr1]]: [[tr2]]; [[tr3]], wherein, " [[" is the beginning label of the variable that extracts, "]] " for extracting the end mark of variable, if a field value of message header field corresponding to this From Template is＜sip:192.168.246.171:5060; Lr 〉, therefore, the variable that strictly extracts according to From Template is: [[tr1]]=192.168.246.171, [[tr2]]=5060, [[tr3]]=lr 〉, thereby make when extracting three variablees according to this From Template, removed the symbol ": " between first variable and second variable, and removed symbol between second variable and the 3rd variable "; ".
The purpose template part is that the ISC gateway device will be according to this template, the final value of generating messages head field or message body field in the template of the field value time institute foundation of the message header field that generates new sip message.With the same in From Template, in the purpose template, also can according to the actual needs, add new interval and meet between each variable, with the form of stipulating in the Session Initiation Protocol that meets the recipient;
For example, suppose extract three variablees [[tr1]], [[tr2]] and [[tr3]] according to a upper 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 comprised 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 mate.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 receives, and the variable in this sip message " [[3]] " is when comprising the character string of " tag=", and this message is changed 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 meaning of various piece representative, choose for the message change rule of the sip message coupling that receives in the set of message change rule, and sip message is carried out complete change.And the concrete form of above-mentioned message change rule; and the specific definition of each several part; it is an execution mode of comparatively optimizing of the embodiment of the present invention; and on the basis of having realized the embodiment of the present invention; resulting extended formatting and definition to message change rule also belong to the scope that the present invention protects.
Fig. 3 is the flow chart of the communication means of another next generation network of the embodiment of the present invention and IP Multimedia System, and as shown in Figure 3, the 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 present invention.
Step 302, the ISC gateway is changed INVITE according to inquire and message change rule this INVITE coupling;
The inquiry of ISC gateway to message change rule, and be described in detail in embodiment two according to the concrete steps of the message change rule that inquires to the change of sip message, in the present embodiment, mainly illustrate the ISC gateway to the change of IMS core net to the sip message of NGN application server sending direction, and suppose that the Method type of this message is INVITE.Suppose to inquire from default message change regular collection, with the first message change rule of the 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 regular four according to above-mentioned these four message change rules of minute another name that put in order.
At first, can learn from the message header part of above-mentioned four message change rule, these four message change rules are respectively the changes for the message header field of a field of INVITE " From ", " P-Asserted-Identity " by name, " Contact " and " Request-Uri "; And they for the change direction be all " 0 ", namely for the change of IMS network to the NGN network; The operational order of these four message change rules is all " M " simultaneously, is namely the retouching operation to four message header fields of INVITE; In addition, its effective term is all " [[method]]～equl～INVITE ", and the requesting method name of the sip message that namely receives is called INVITE.
Particularly, can find out from the From Template of rule one, this message change rule is to extract [[f1]] and [[f2]] two variablees in a 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 can find out from the purpose template, a new field value that generates still is comprised 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 in INVITE, symbol "+" removal between the variable of a field value of the message header field of a field " From " by name.
Equally, rule two, rule three and rule four purpose also for similarly with in 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 is also the optional step in the embodiment of the present invention.
So far, the ISC gateway has just been completed once complete process to sending to the sip message of NGN application server to change and forward from the IMS core net, and the 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 present invention and IP Multimedia System, and as shown in Figure 4, the 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 present invention.
Step 402, the ISC gateway is changed INVITE according to inquire and message change rule this INVITE coupling;
In the present embodiment, mainly illustrate the ISC gateway to the change of NGN application server to the sip message of IMS core net sending direction, and suppose that the Method type of this message is INVITE.Suppose to inquire from default message change regular collection, with the first message change rule of the 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 regular five according to above-mentioned these five message change rules of minute another name that put in order.
At first, can learn from the message header part of above-mentioned five message change rule, these five message change rules are respectively the changes for the message header field of a field of INVITE " Route ", " Top-Route " by name, " Request-Uri ", " From " and " P-Asserted-Identity "; And they for the change direction be " 1 " or " 2 ", namely for the change of NGN network to IMS network, perhaps all be suitable for for both direction; Simultaneously operational orders of these five message change rules are respectively " R ", " A ", " M ", " R ", " A ", namely 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 ", it is the sip message that the requesting method name is called INVITE that is applicable to of its restriction, and the effective term that has also comprised " [[route]]～equl～" in rule two, delegate rules two is applicable to not comprise in the sip message of [[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 INVITE, the read operation of the message header field of field " Route " by name, and can find out from its From Template, this message change rule is to extract [[route]] variable in a 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, having used [[route]] variable whether this message change rule is come into force judges, when judging that [[route]] variable is for sky in the INVITE that receives, should increase the message header field of a new field " Top-Route " by name in INVITE, 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 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 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 100 Trying Temporary Response message to the ISC gateway.
Particularly, this step is also the optional step in the embodiment of the present invention.
So far, the ISC gateway has just been completed once complete process to sending to the sip message of IMS core net to change and forward from the NGN application server, 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 completed by the hardware that program command is correlated with, aforesaid program can be stored in a 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: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Fig. 5 is the structural representation that a kind of IP multimedia service of the embodiment of the present invention is controlled gateway device, and as shown in Figure 5, the ISC gateway device of the present embodiment comprises:
Message change rule query unit 1 is used for receiving the first session initiation message that the first network element sends, and inquiry is changed rule with the first message of described the first session initiation message coupling from the message change regular collection of presetting;
The first network element wherein is the NGN application server, and the second network element is the IMS core net; Perhaps, the first network element is the IMS core network, and the second network element is the NGN application server.
Wherein, the related message of the present embodiment change regular collection, NGN application server, IMS core net and related specific works process, 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 of the embodiment of the present invention is controlled gateway device, by being added between NGN application server and IMS core net, and by in the transport process of sip message, after being changed, the sip message of transmit leg transmission is transmitted to again the recipient, make it to meet recipient's Session Initiation Protocol standard, thereby IMS and the difference of NGN on the Session Initiation Protocol standard have been shielded in the process of change and forwarding, need not to revise on the basis of business realizing, realize the complete compatibility of NGN and IMS, made the business that NGN provides to be applicable to simultaneously fixed line and mobile phone.
Fig. 6 is the structural representation that the another kind of IP multimedia service of the embodiment of the present invention is controlled gateway device, and as shown in Figure 6, on the basis of a upper embodiment, further, in the present embodiment, the message in the ISC gateway device is changed rule query unit 1 and also comprised:
The first message change rule query subelement 11, be used for determining according to the source address information of described the first session initiation message the sending direction of described the first session initiation message, change from described default message and inquire about the set regular with the second message change of described sending direction coupling regular collection;
The second message change rule query subelement 12, be connected with described the first message change rule query subelement 11, be used for the effective term according to described the second message change, inquiry the first message change rule from the set of described the second message change rule is so that described the first session initiation message satisfies the effective term of described the first message change rule.
Wherein said effective term comprises the first effective term, described the first session initiation message satisfies described the first regular effective term of message change and comprises, the requesting method of described the first session initiation message should be the session setup requesting method of appointment in described the first effective term.
Further, described effective term also comprises the second effective term, described the first session initiation message satisfies described the first regular effective term of message change and comprises, the message header field of described the first session initiation message or message body field comprise numerical value or the character string of appointment in described the second effective term.
Further, in the present embodiment, the message changing 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 the first message change rule, in the message first place of described the first message change rule corresponding message header field or message body field, extract one or more variablees;
Message increases subelement 23, is used for when described operational order when increasing operation, according to the purpose template of described the first message change rule, generates with described the first message and changes new message header field corresponding to regular message first place;
Can call mutually between 4 unit of message changing 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 the present embodiment change regular collection, NGN application server, IMS core net and related specific works process, 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 of the embodiment of the present invention is controlled gateway device, by being added between NGN application server and IMS core net, and by in the transport process of sip message, according to the various information of the sip message that receives, the message change rule that matches is inquired about, 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 changing is transmitted to recipient's network, IMS and the difference of NGN on the Session Initiation Protocol standard between parts have been shielded in repeating process, need not to revise on the basis of business realizing, realized the complete compatibility of NGN and IMS, make the business that NGN provides to be applicable to simultaneously fixed line and mobile phone.
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 in a lot of situation, the former is better execution mode.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; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in 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 (8)
1. the communication means of a next generation network and IP Multimedia System, is characterized in that, comprising:
IP multimedia service is controlled the ISC gateway device and is received the first session initiation message that the first network element sends, and inquiry is changed rule with the first message of described the first session initiation message coupling from the message change regular collection of presetting;
Described ISC gateway device changes to the second session initiation message of the session initiation protocol standard that meets the second network element according to described the first message change rule with described the first session initiation message, and described the second session initiation message is sent to described the second network element;
Described the first network element is the next generation network application server, and described the second network element is the IP Multimedia System core net; Perhaps, described the first network element is the IP Multimedia System core net, and described the second network element is the next generation network application server;
Include operational order in the first message change rule, be used to indicate described ISC gateway device to the change operation of described the first session initiation message, and also include the message first place in described the first message change rule, being used to indicate described ISC gateway device should to which the message header field in described the first session initiation message that receives change according to described the first message change rule, or should change the message body field according to described the first message change rule;
Described ISC gateway device is specially according to described the first message change rule the second session initiation message that described the first session initiation message changes to the session initiation protocol standard that meets the second network element:
Described ISC gateway device is according to the operational order of described the first message change rule, and message header field or the message body field of first session initiation message corresponding with the message first place of described the first message change rule are changed;
Described ISC gateway device is according to the operational order of described the first message change rule, and message header field or the message body field of first session initiation message corresponding with the message first place of described the first message change rule are changed, and comprising:
When described operational order was read operation, described ISC gateway device was according to the From Template of described the first message change rule, in the message first place of described the first message change rule corresponding message header field or message body field, extracted one or more variablees;
When described operational order is retouching operation, described ISC gateway device is according to the From Template of described the first message change rule, in the message first place of described the first message change rule corresponding message header field or message body field, extract one or more variablees, and with the purpose template of described variable according to described the first message change rule, be combined into the new message header field corresponding with the message first place of described the first message change rule or new message body field;
When increasing operation, described ISC gateway device is according to the purpose template of described the first message change rule when described operational order, generates the new message header field corresponding with described the first message change regular message first place;
When described operational order is deletion action, the message header field deletion in described the first session initiation message that described ISC gateway device will be corresponding with the message first place of described the first message change rule.
2. the communication means of next generation network according to claim 1 and IP Multimedia System, is characterized in that, the first message change rule of inquiry and described the first session initiation message coupling from default message change regular collection comprises:
Determine the sending direction of described the first session initiation message according to the source address information of described the first session initiation message, inquire about the set of changing rule with the second message of described sending direction coupling from described default message change regular collection;
According to the effective term of described the second message change rule, inquiry the first message change rule from the set of described the second message change rule is so that described the first session initiation message satisfies the effective term of described the first message change rule.
3. the communication means of next generation network according to claim 2 and IP Multimedia System, is characterized in that,
Described effective term comprises the first effective term;
Described the first session initiation message satisfies described the first regular effective term of message change and comprises, the requesting method of described the first session initiation message is the session setup requesting method of appointment in described the first effective term.
4. the communication means of next generation network according to claim 3 and IP Multimedia System, is characterized in that,
Described effective term also comprises the second effective term;
Described the first session initiation message satisfies described the first regular effective term of message change and comprises, the message header field of described the first session initiation message or message body field comprise numerical value or the character string of appointment in described the second effective term.
5. an IP multimedia service is controlled gateway device, it is characterized in that, comprising:
Message change rule query unit is used for receiving the first session initiation message that the first network element sends, and inquiry is changed rule with the first message of described the first session initiation message coupling from the message change regular collection of presetting;
The message changing unit, be connected with described message change rule query unit, be used for according to described the first message change rule, described the first session initiation message being changed to the second session initiation message of the session initiation protocol standard that meets the second network element, and described the second session initiation message is sent to described the second network element;
Described the first network element is the next generation network application server, and described the second network element is the IP Multimedia System core net; Perhaps, described the first network element is the IP Multimedia System core net, and described the second network element is the next generation network application server;
Include operational order in the first message change rule, be used to indicate the ISC gateway device to the change operation of described the first session initiation message, and also include the message first place in described the first message change rule, being used to indicate described ISC gateway device should to which the message header field in described the first session initiation message that receives change according to described the first message change rule, or should change the message body field according to described the first message change rule;
Described message changing unit also is used for the operational order according to described the first message change rule, and message header field or the message body field of first session initiation message corresponding with the message first place of described the first message change rule are changed;
Described message changing unit comprises:
Message reads subelement, be used for when described operational order is read operation, according to the From Template of described the first message change rule, in the message first place of described the first message change rule corresponding message header field or message body field, extract one or more variablees;
The message modification subelement, be used for when described operational order is retouching operation, From Template according to described the first message change rule, in the message first place of described the first message change rule corresponding message header field or message body field, extract one or more variablees, and with the purpose template of described variable according to described the first message change rule, be combined into the new message header field corresponding with the message first place of described the first message change rule or new message body field;
Message increases subelement, is used for when described operational order when increasing operation, according to the purpose template of described the first message change rule, generates with described the first message and changes new message header field corresponding to regular message first place;
Message deletion subelement is used for when described operational order during for deletion, and the message header field in described the first session initiation message that will be corresponding with the message first place of described the first message change rule is deleted.
6. IP multimedia service according to claim 5 is controlled gateway device, it is characterized in that, described message change rule query unit comprises:
The first message change rule query subelement, be used for determining according to the source address information of described the first session initiation message the sending direction of described the first session initiation message, change from described default message and inquire about the set regular with the second message change of described sending direction coupling regular collection;
The second message change rule query subelement, be connected with described the first message change rule query subelement, be used for the effective term according to described the second message change rule, inquiry the first message change rule from the set of described the second message change rule is so that described the first session initiation message satisfies the effective term of described the first message change rule.
7. IP multimedia service according to claim 6 is controlled gateway device, it is characterized in that,
Described effective term comprises the first effective term;
Described the first session initiation message satisfies described the first regular effective term of message change and comprises, the requesting method of described the first session initiation message is the session setup requesting method of appointment in described the first effective term.
8. IP multimedia service according to claim 7 is controlled gateway device, it is characterized in that,
Described effective term also comprises the second effective term;
Described the first session initiation message satisfies described the first regular effective term of message change and comprises, the message header field of described the first session initiation message or message body field comprise numerical value or the character string of appointment in described the second effective term.
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