CN101646138B - Short message signaling time-sequence correcting device and method - Google Patents
Short message signaling time-sequence correcting device and method Download PDFInfo
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- CN101646138B CN101646138B CN200910161923A CN200910161923A CN101646138B CN 101646138 B CN101646138 B CN 101646138B CN 200910161923 A CN200910161923 A CN 200910161923A CN 200910161923 A CN200910161923 A CN 200910161923A CN 101646138 B CN101646138 B CN 101646138B
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Abstract
The invention relates to an initial signaling time-sequence correcting method, comprising the following steps: a collection and recording step: at least three initial short-message signalings among network elements are collected, all the short-message signalings are connected, and short-message signaling generation time among the network elements is recorded; a time-sequence correcting step: each short-message signaling matched with presetting initial standard is used as an initial standard signaling, and the same logic sequence is set, other short-message signalings corresponding to the two network elements are adjusted according to the recorded short-message signaling generation time, so as to keep the time interval of the short-message signaling and the initial standard signaling to be not changed. The method and the device realize the collection of sequence disorder of the short-message signalings.
Description
Technical field
The present invention relates to the communications field, short message signaling time-sequence correcting device and method in especially a kind of signaling monitoring system.
Background technology
Signaling network is introduced
The transmission of any practical application information transmission of some control informations that invariably accompanies between the communication apparatus, they are according to set communications protocol work, with The information security, be sent to the destination reliably, efficiently.These information are called Protocol Control Information in computer network, and in telecommunications network, are called signaling (Signal).English data is also often used " Signalling " (signaling procedure) speech, but most of Chinese technology data is only used " signaling " speech, and promptly " signaling " not only comprises " Signal " but also comprise " Signalling " double implication.
Signaling is divided into two types of subscriber signaling and interoffice signalings by its purposes.The former acts between the switch of subscriber terminal equipment (like telephone set) and telephone office, and the latter acts between two switches with the trunk line connection.
Interoffice signaling divides Channel Associated Signaling and Common Channel Signaling two big classes, and the former utilizes the interoffice junction circuit to transmit signaling (being that voiceband user transmits on identical circuit with signaling); Passage that The latter is independent or circuit transmit signaling.No.7 signalling system (Signalling System No.7 is called for short Signaling System Number 7 or SS7) is a kind of digital common channel signalling of interoffice.
Utilize No.7 signalling system between MSC, STP, sms center, to transmit short message signaling in the GSM network, have short message content in the short message signaling, be note be handed down to the user must be through flow process.
GSM note flow process is introduced
The basic procedure of mobile originating short message
For mobile phone, mobile originating short message and Mobile-Terminated Short Message are two processes fully independently, and the short message of mobile originating begins from the mobile phone connecting system, till receiving the transmission success that short message service center sends.Mobile phone sends to MSC (mobile switching centre, Mobile Switching Center) with note, and MSC is according to the identification number of the short message service center of carrying in the note; Through STP (Signalling Transfer Point; Signal transfer point) note is submitted to IWMSC (InterWorking MSC, intercommunication mobile switching centre), submit SC (short message service center to by IWMSC; Short Message Center), the flow chart of mobile originating short message is as shown in Figure 1.Wherein, LSTP representes Low Level Signaling Transfer Point LSTP, and English full name is low signal transfer point, and HSTP representes HSTP High Signaling Transport Point, and English full name is high signal transfer point.
The basic procedure of Mobile-Terminated Short Message
The called process of the process of Mobile-Terminated Short Message and mobile subscriber is similar; Short message service center sends to SMS-GMSC (Short Message Service Gateway) with the short message of receiving; SMS-GMSC obtains to HLR (attaching position register, Home location register) and is the necessary routing iinformation that sends SMS message, and then note is sent to the MSC (mobile switching centre at note recipient place; Mobile Switching Center), by MSC short message is sent to mobile phone.Whole process comprises and sending routing information, and paging inserts and page response; Authentication ciphering; Short message transmits, and accepts the result to short message service center's report at last, and this result send HLR and SC respectively through SMS_GMSC; By the SC loopback short message user that starts, the flow chart of Mobile-Terminated Short Message is as shown in Figure 2.
Signaling among Fig. 1 and Fig. 2 all is to use the MAP signaling of Signaling System Number 7 net to transmit
GSM short message signaling monitoring system is introduced
GSM short message signaling monitoring system is the system of short message signaling between each network element of monitoring, can each section note be carried out association through this system, and presents the order that each network element signaling produces.
The problem that produces during the monitoring of GSM short message signaling
The signaling process model of normal note is as shown in Figure 3, but that reasons such as, transmission delay inconsistent owing to time synchronized between different network elements can produce signaling is out of order, and the out of order model of signaling is as shown in Figure 4.
In existing each short message signaling monitoring product, all do not have out of order problem settling time, this signaling that just causes showing takes place out of order.The out of order measure of existing solution signaling is to improve timing tracking accuracy, but can not change the influence of propagation delay time, and improving timing tracking accuracy simultaneously needs more accurate clock source.These all can not fundamentally solve the out of order problem of signaling.
Summary of the invention
The technical problem that the present invention will solve provides a kind of short message signaling time-sequence correcting method and apparatus, to realize the out of order correction of short message signaling.
For solving the problems of the technologies described above, the present invention also provides a kind of short message signaling time-sequence correcting device, and said device comprises acquisition and recording module and the sequential correction module that is connected, wherein:
Said acquisition and recording module is used to gather the short message signaling between at least three network elements, and each section short message signaling is carried out association, writes down each network element short message signaling generation time, and said short message signaling comprises the short message signaling that starts;
Said time-sequence correcting module; Be used for carrying out time-sequence correcting to each network element short message signaling of origination process; Specifically will with each short message signaling of the preset benchmark coupling that starts as starting reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of said acquisition and recording module records, make itself and the said time interval of starting between the reference signaling constant.
Further, the short message signaling of said acquisition and recording module records comprises the termination short message signaling; Said time-sequence correcting module; Also be used for carrying out time-sequence correcting to each network element termination short message signaling of termination process; Specifically will with each short message signaling of the preset first termination benchmark coupling as the first termination reference signaling and be set to identical logical order; Will with each short message signaling of the preset second termination benchmark coupling as the second termination reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of said acquisition and recording module records, make the time interval between itself and the first termination reference signaling or the second termination reference signaling constant.
Further, when the termination short message signaling between network element is carried out time-sequence correcting, when the first termination reference signaling is only arranged between the network element as reference signaling, as benchmark other short message signalings are carried out time-sequence correcting with the first termination reference signaling; When the second termination reference signaling is only arranged between the network element as reference signaling, as benchmark other short message signalings are carried out time-sequence correcting with the second termination reference signaling; When the existing first termination reference signaling has the second termination reference signaling as reference signaling again between network element; Other short message signalings before the second termination reference signaling are that benchmark carries out time-sequence correcting with the first termination reference signaling, and other short message signalings after the second termination reference signaling are that benchmark carries out time-sequence correcting with the second termination reference signaling.
Further, the said reference signaling that starts is MAP-FORWARD-SMS; The said first termination reference signaling is SEND-ROUTING-INFO-FOR-SMS, and the said second termination reference signaling is MAP-FORWARD-SMS.
Further, said device also comprises the display module that is connected with said time-sequence correcting module, is used to show the signaling logic order after said time-sequence correcting module is corrected.
For solving above technical problem, the present invention also provides a kind of signaling time-sequence correcting method that starts, and this method comprises:
The acquisition and recording step is gathered the short message signaling that starts between at least three network elements, and each section short message signaling is carried out association, writes down each network element short message signaling generation time;
The time-sequence correcting step; Will with each short message signaling of the preset benchmark coupling that starts as starting reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of record, make itself and the said time interval of starting between the reference signaling constant.
Further, the said reference signaling that starts is MAP-FORWARD-SMS.
For solving above technical problem, the present invention also provides a kind of termination signaling time-sequence correcting method, and this method comprises:
The acquisition and recording step is gathered the termination short message signaling between at least three network elements, and each section short message signaling is carried out association, writes down each network element short message signaling generation time;
The time-sequence correcting step: will with each short message signaling of the preset first termination benchmark coupling as the first termination reference signaling and be set to identical logical order; Will with each short message signaling of the preset second termination benchmark coupling as the second termination reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of record, make it constant with the time interval that the first termination reference signaling or second terminates between the reference signaling.
Further, in the said time-sequence correcting step,, then as benchmark other short message signalings are carried out time-sequence correcting with the first termination reference signaling if the first termination reference signaling is only arranged during between the network element as reference signaling; When if the second termination reference signaling is only arranged between the network element as reference signaling, then as benchmark other short message signalings are carried out time-sequence correcting with the second termination reference signaling; When if the existing first termination reference signaling has the second termination reference signaling as reference signaling again between the network element; Then other short message signalings before the second termination reference signaling are that benchmark carries out time-sequence correcting with the first termination reference signaling, and other short message signalings after the second termination reference signaling are that benchmark carries out time-sequence correcting with the second termination reference signaling.
Further, the said first termination reference signaling is SEND-ROUTING-INFO-FOR-SMS, and the said second termination reference signaling is MAP-FORWARD-SMS.
Short message signaling time-sequence correcting method and apparatus of the present invention is through with reference signaling and be set to identical logical order; And according to the record the short message signaling generation time adjust other short message signalings between corresponding two network elements; Make the time interval between itself and the reference signaling constant; The present invention has realized the out of order correction of signaling, and technology is simple, and cost is lower.
Description of drawings
Fig. 1 is the flow chart of mobile originating short message.
Fig. 2 is the flow chart of Mobile-Terminated Short Message.
Fig. 3 is the signaling process model sketch map of normal note.
Fig. 4 is the out of order model sketch map of signaling process.
Fig. 5 is under the normal condition, and signaling cooperates the model sketch map between each network element.
Fig. 6 is that signaling cooperates the model sketch map between each network element after adopting the inventive method to carry out time-sequence correcting.
Fig. 7 is the out of order model sketch map of the short message signaling that starts that application example one of the present invention is gathered.
Fig. 8 is the short message signaling model sketch map that starts after application example one of the present invention is corrected.
Fig. 9 is the out of order model sketch map of termination short message signaling that application example two of the present invention is gathered.
Figure 10 is the termination short message signaling model sketch map after application example two of the present invention is corrected.
Embodiment
Short message signaling time-sequence correcting method of the present invention can be carried out time-sequence correcting to start short message signaling and termination short message signaling, and wherein, the short message signaling time-sequence correcting method that starts comprises:
The acquisition and recording step is gathered the short message signaling that starts between at least three network elements, and each section short message signaling is carried out association, writes down each network element short message signaling generation time;
The time-sequence correcting step; Will with each short message signaling of the preset benchmark coupling that starts as starting reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of record, make itself and the said time interval of starting between the reference signaling constant.
Termination signaling time-sequence correcting method comprises:
The acquisition and recording step is gathered the termination short message signaling between network element at least, and each section short message signaling is carried out association, writes down each network element short message signaling generation time;
The time-sequence correcting step: will with each short message signaling of the preset first termination benchmark coupling as the first termination reference signaling and be set to identical logical order; Will with each short message signaling of the preset second termination benchmark coupling as the second termination reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of record, make it constant with the time interval that the first termination reference signaling or second terminates between the reference signaling.
Under the normal condition; It is as shown in Figure 5 that signaling cooperates model between each network element; After adopting above method to carry out time-sequence correcting; Signaling cooperation model is as shown in Figure 6 between each network element, and signaling cooperates near truth between each network element after employing the inventive method is corrected, and can satisfy signaling cooperation graphical display use by least cost.
The said network element of the present invention refers to sms center (SC), Short Message Service Gateway (SMS-GMSC), intercommunication mobile switching centre (IWMSC), HSTP High Signaling Transport Point (HSTP), Low Level Signaling Transfer Point LSTP (LSTP), attaching position register (HLR) or mobile switching centre (MSC).The present invention refers to that the interoffice common channel signalling between the above network element promptly is the SS7 signaling.
Below in conjunction with accompanying drawing, signaling time-sequence correcting method of the present invention is described in detail:
Implementation method:
The first step: gather the MAP short message signaling between at least three network elements; Each section MAP short message signaling is carried out association; Write down each network element short message signaling generation time, and judge that short message signaling is that MO (Mobile Originated, mobile phone is initial) process signaling still is MT (Mobile Terminated; The mobile phone termination) the process signaling;
Second step: if short message signaling is the MO process signaling; Then be the reference signaling that starts with the MAP-FORWARD-SMS signaling; MAP-FORWARD-SMS signaling between each network element is set to identical logical order; Promptly show, and adjust other short message signalings between corresponding two network elements, make the time interval between itself and the said MAP-FORWARD-SMS signaling constant according to the short message signaling generation time of record in same lines.
This method is thought in MO process; MAP-FORWARD-SMS transmits between all network elements; So can this message of each section be shown in same lines as the preset benchmark that starts; Because each section (MAP section) article one signaling must be MAP-FORWARD-SMS, therefore adopt this signaling to obtain more easily synchronously again, realize the out of order correction of signaling.。
Application example one: the out of order cooperation model of the short message signaling that starts between the network element A of collection, B, C is as shown in Figure 7; It then is benchmark with MAP-FORWARD-SMS; MAP-FORWARD-SMS between the MAP-FORWARD-SMS between network element A, B and network element B, C is corrected as the identity logic order; Show in same lines, and the MAP-FORWARD-SMSACK between adjustment network element A, B, make itself and MAP-FORWARD-SMS between network element A, B keep with correction before the identical time interval; MAP-FORWARD-SMS ACK between adjustment network element B, C; Make itself and MAP-FORWARD-SMS between network element B, C keep with correct before the identical time interval, promptly the time interval constant, the cooperation model behind the time-sequence correcting is as shown in Figure 8.
The 3rd step: if short message signaling is the MT course signaling; With SEND-ROUTING-INFO-FOR-SM is the first termination benchmark; With MAP-FORWARD-SMS is the second termination benchmark, and the SEND-ROUTING-INFO-FOR-SM signaling is set to identical logical order, and MAP-FORWARD-SMS is set to identical logical order; Be that the SEND-ROUTING-INFO-FOR-SMS signaling shows in delegation, the MAP-FORWARD-SMS signaling shows in delegation; And according to the record the short message signaling generation time adjust other short message signalings between corresponding two network elements; The time interval that itself and the first termination reference signaling or second are terminated between the reference signaling is constant, can effectively solve out of order problem of time among the signaling cooperation figure like this.
Below with article one MAP signaling SEND-ROUTING-INFO-FOR-SMS as first the termination benchmark; Though the SEND-ROUTING-INFO-FOR-SMS signaling is the beginning signaling of MT course; But it is not between all network elements, to transmit; Can in the network element that the SEND-ROUTING-INFO-FOR-SMS signaling is arranged, use this message as the first termination reference signaling, and then use the MAP-FORWARD-SMS signaling to carry out synchronously as the method for the second termination reference signaling.
When the first termination reference signaling (SEND-ROUTING-INFO-FOR-SMS) is only arranged between the network element as reference signaling, as benchmark other short message signalings are carried out time-sequence correcting with the first termination reference signaling; When the second termination reference signaling (MAP-FORWARD-SMS) is only arranged between the network element as reference signaling, as benchmark other short message signalings are carried out time-sequence correcting with the second termination reference signaling; When the existing first termination reference signaling has the second termination reference signaling as reference signaling again between network element; Other short message signalings before the second termination reference signaling are that benchmark carries out time-sequence correcting with the first termination reference signaling, and other short message signalings after the second termination reference signaling are that benchmark carries out time-sequence correcting with the second termination reference signaling.
Application example two:
The out of order cooperation model of termination short message signaling between the network element A that gathers, B, C is as shown in Figure 9.
Adopt following method to correct to above termination short message signaling:
SEND-ROUTING-INFO-FOR-SMS between the SEND-ROUTING-INFO-FOR-SMS between network element A, B and network element B, C is corrected as the identity logic order; Show in same lines; And the SEND-ROUTING-INFO-FOR-SMS ACK between adjustment network element A, B; Make itself and SEND-ROUTING-INFO-FOR-SMS between network element A, B keep with correct before the identical time interval; SEND-ROUTING-INFO-FOR-SMS ACK between adjustment network element B, C, make itself and SEND-ROUTING-INFO-FOR-SMS between network element B, C keep with correction before the identical time interval, promptly the time interval is constant; In addition the MAP-FORWARD-SMS between the MAP-FORWARD-SMS between network element A, B and network element B, C is corrected as the identity logic order; Show in same lines; And the MAP-FORWARD-SMS ACK between adjustment network element A, B; Make itself and MAP-FORWARD-SMS between network element A, B keep with correct before the identical time interval, the MAP-FORWARD-SMS ACK between adjustment network element B, C, make itself and MAP-FORWARD-SMS between network element B, C keep with correction before the identical time interval; Be that the time interval is constant, the cooperation model behind the time-sequence correcting is shown in figure 10.
When showing short message signaling, no longer show, but show according to the logical order synchronously according to time sequencing.
In order to realize above method, the present invention also provides a kind of short message signaling time-sequence correcting device, and said device comprises acquisition and recording module, time-sequence correcting module and the display module that connects successively, wherein:
Said acquisition and recording module is used to gather short message signaling between each network element, and each section short message signaling is carried out association, writes down each network element short message signaling generation time, and said short message signaling comprises the short message signaling that starts;
Said time-sequence correcting module; Be used for carrying out time-sequence correcting to each network element short message signaling of origination process; Specifically will with each short message signaling of the preset benchmark coupling that starts as starting reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of acquisition and recording module records, make itself and the said time interval of starting between the reference signaling constant.
The time-sequence correcting module; Also be used for carrying out time-sequence correcting to each network element termination short message signaling of termination process; Will with each short message signaling of the preset first termination benchmark coupling as the first termination reference signaling and be set to identical logical order; Will with each short message signaling of the preset second termination benchmark coupling as the second termination reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of acquisition and recording module records, make the time interval between itself and the first termination reference signaling or the second termination reference signaling constant.
When each network element termination short message signaling is carried out time-sequence correcting, when the first termination reference signaling is only arranged between the network element as reference signaling, as benchmark other short message signalings are carried out time-sequence correcting with the first termination reference signaling; When the second termination reference signaling is only arranged between the network element as reference signaling, as benchmark other short message signalings are carried out time-sequence correcting with the second termination reference signaling; When the existing first termination reference signaling has the second termination reference signaling as reference signaling again between network element; Other short message signalings before the second termination reference signaling are that benchmark carries out time-sequence correcting with the first termination reference signaling, and other short message signalings after the second termination reference signaling are that benchmark carries out time-sequence correcting with the second termination reference signaling.
The said preset benchmark that starts is the short message signaling type of between all network elements, transmitting, and is MAP-FORWARD-SMS like the said reference signaling that starts.The said first termination reference signaling is SEND-ROUTING-INFO-FOR-SMS, and the said second termination reference signaling is MAP-FORWARD-SMS.
The said network element of the present invention refers to sms center (SC), Short Message Service Gateway (SMS-GMSC), intercommunication mobile switching centre (IWMSC), HSTP High Signaling Transport Point (HSTP), Low Level Signaling Transfer Point LSTP (LSTP), attaching position register (HLR) or mobile switching centre (MSC).
Display module is used for display timing generator and corrects the signaling logic order after module is corrected.
Short message signaling time-sequence correcting method and apparatus of the present invention is through with reference signaling and be set to identical logical order; And according to the record the short message signaling generation time adjust other short message signalings between corresponding two network elements; Make the time interval between itself and the reference signaling constant; The present invention has realized the out of order correction of signaling, and technology is simple, and cost is lower.
Claims (10)
1. short message signaling time-sequence correcting device, it is characterized in that: said device comprises acquisition and recording module and the time-sequence correcting module that is connected, wherein:
Said acquisition and recording module is used to gather the short message signaling between at least three network elements, and each section short message signaling is carried out association, writes down each network element short message signaling generation time, and said short message signaling comprises the short message signaling that starts;
Said time-sequence correcting module; Be used for carrying out time-sequence correcting to each network element short message signaling of origination process; Specifically will with each short message signaling of the preset benchmark coupling that starts as starting reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of said acquisition and recording module records, make itself and the said time interval of starting between the reference signaling constant.
2. device as claimed in claim 1 is characterized in that: the short message signaling of said acquisition and recording module records comprises the termination short message signaling; Said time-sequence correcting module; Also be used for carrying out time-sequence correcting to each network element termination short message signaling of termination process; Specifically will with each short message signaling of the preset first termination benchmark coupling as the first termination reference signaling and be set to identical logical order; Will with each short message signaling of the preset second termination benchmark coupling as the second termination reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of said acquisition and recording module records, make the time interval between itself and the first termination reference signaling or the second termination reference signaling constant.
3. device as claimed in claim 2; It is characterized in that: when the termination short message signaling between network element is carried out time-sequence correcting; When the first termination reference signaling is only arranged between the network element as reference signaling, as benchmark other short message signalings are carried out time-sequence correcting with the first termination reference signaling; When the second termination reference signaling is only arranged between the network element as reference signaling, as benchmark other short message signalings are carried out time-sequence correcting with the second termination reference signaling; When the existing first termination reference signaling has the second termination reference signaling as reference signaling again between network element; Other short message signalings before the second termination reference signaling are that benchmark carries out time-sequence correcting with the first termination reference signaling, and other short message signalings after the second termination reference signaling are that benchmark carries out time-sequence correcting with the second termination reference signaling.
4. like claim 2 or 3 described devices, it is characterized in that: the said reference signaling that starts is MAP-FORWARD-SMS; The said first termination reference signaling is SEND-ROUTING-INFO-FOR-SMS, and the said second termination reference signaling is MAP-FORWARD-SMS.
5. like each described device in the claim 1 to 4, it is characterized in that: said device also comprises the display module that is connected with said time-sequence correcting module, is used to show the signaling logic order after said time-sequence correcting module is corrected.
6. signaling time-sequence correcting method that starts is characterized in that this method comprises:
The acquisition and recording step is gathered the short message signaling that starts between at least three network elements, and each section short message signaling is carried out association, writes down each network element short message signaling generation time;
The time-sequence correcting step; Will with each short message signaling of the preset benchmark coupling that starts as starting reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of record, make itself and the said time interval of starting between the reference signaling constant.
7. method as claimed in claim 6 is characterized in that: the said reference signaling that starts is MAP-FORWARD-SMS.
8. termination signaling time-sequence correcting method is characterized in that this method comprises:
The acquisition and recording step is gathered the termination short message signaling between at least three network elements, and each section short message signaling is carried out association, writes down each network element short message signaling generation time;
The time-sequence correcting step: will with each short message signaling of the preset first termination benchmark coupling as the first termination reference signaling and be set to identical logical order; Will with each short message signaling of the preset second termination benchmark coupling as the second termination reference signaling and be set to identical logical order; And adjust other short message signalings between corresponding two network elements according to the short message signaling generation time of record, make it constant with the time interval that the first termination reference signaling or second terminates between the reference signaling.
9. method as claimed in claim 8 is characterized in that: in the said time-sequence correcting step, if the first termination reference signaling is only arranged during as reference signaling between the network element, then as benchmark other short message signalings are carried out time-sequence correcting with the first termination reference signaling; When if the second termination reference signaling is only arranged between the network element as reference signaling, then as benchmark other short message signalings are carried out time-sequence correcting with the second termination reference signaling; When if the existing first termination reference signaling has the second termination reference signaling as reference signaling again between the network element; Then other short message signalings before the second termination reference signaling are that benchmark carries out time-sequence correcting with the first termination reference signaling, and other short message signalings after the second termination reference signaling are that benchmark carries out time-sequence correcting with the second termination reference signaling.
10. like claim 8 or 9 described methods, it is characterized in that: the said first termination reference signaling is SEND-ROUTING-INFO-FOR-SMS, and the said second termination reference signaling is MAP-FORWARD-SMS.
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