CN104010325A

CN104010325A - Trigger message delivery control method, equipment and system

Info

Publication number: CN104010325A
Application number: CN201310058341.XA
Authority: CN
Inventors: 王胡成
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-02-25
Filing date: 2013-02-25
Publication date: 2014-08-27
Anticipated expiration: 2033-02-25
Also published as: CN104010325B

Abstract

The invention discloses a trigger message delivery control method, equipment and a system. The method comprises the following steps: An MTC-IWF delivers a trigger message to a service node of UE through a T5 interface and receives a congestion control instruction and congestion duration which are returned by the service node; a congestion control timer is started according to the congestion duration; the trigger message is cached; if lifecycle is out of date before timeout of the congestion control timer, a trigger message delivery failure message is sent to an SCS/AS and the cached trigger message is deleted; and otherwise, the trigger message is delivered again through the T5 interface. As the timer which is started based on the congestion duration is maintained on the MTC-IWF and the trigger message is cached, The case that the SCS/AS triggers a large number of trigger messages or the trigger message is not delivered timely after the congestion duration disappears will not happen, and signaling overhead of a Tsp interface is also avoided. The SCS/AS no longer maintains the timer, and extra cost is also avoided.

Description

A kind of triggering message dilivery control method, equipment and system

Technical field

The present invention relates to communication technical field, relate in particular to a kind of triggering message dilivery control method, equipment and system.

Background technology

T5 is the interface between machine type communication-interconnected server (Machine Type Communications-Inter Working Function, MTC-IWF) and service node (Serving Node).On T5 interface, support equipment triggers (Device Trigger) function, it requires to use the message of the communication format (generic format) on T5 interface to encapsulate Device Trigger, by the message of generic format, make the content of Device Trigger no longer be confined to Short Message Service (Short Message Service, SMS) length of message, and can also add other information in the message of generic format, priority for example, the terms of validity etc., have good autgmentability.

The flow process of delivering Device Trigger based on T5 interface is as follows:

Step 1, MTC-IWF basis are from home signature user server (Home Subscriber Server, HSS) subscriber equipment (the User Equipment obtaining, the ability of ability UE) and core net (CN) node, determines by T5 interface and delivers Trigger message.

Wherein, the ability of UE has indicated this UE whether to support the Trigger Function of T5 interface, and the ability of CN node has indicated this CN node whether to support the Trigger Function of T5 interface.

Step 2, MTC-IWF are to the current service node of HSS inquiry UE.

Wherein, service node can but to be not limited only to be Mobility Management Entity (Mobility Management Entity, MME)/public land mobile network (Visited Public Land Mobile Network, VPLMN) Serving GPRS Support Node (Serving GPRS Support Node, SGSN).

Step 3, MTC-IWF send and comprise international mobile subscriber identity (International Mobile Subscriber Identification Number to the service node inquiring, IMSI), machine type communication-interconnected server sign (MTC-IWF ID), life cycle, the Trigger message of the information such as priority, and produce charging data record (Charging Data Record, CDR) information.

Wherein, Trigger message is the message of the generic format of above-mentioned encapsulation Device Trigger, comes from service capability server/application server (Services Capability Server, SCS/Application Server, AS).

Step 4, service node are encapsulated into Non-Access Stratum (NAS) message by the Trigger message receiving, and deliver to UE.

Step 5, UE provide the content in universal container (generic container) to corresponding application program (application).

Protocol Data Unit (Protocol Data Unit in step 6, the NAS message based on receiving, PDU), UE carries out corresponding action, for example be established to service capability server/application server (Services Capability Server, SCS/Application Server, AS) connection.

Device Trigger in step 7, UE response message, is encapsulated in response message in general Non-Access Stratum container (generic NAS container) and sends to service node.

Step 8, service node send delivery report (Delivery Report) to MTC-IWF, and whether indication Trigger message is successfully delivered to UE, if delivered unsuccessfully, can also indicate failure cause.

If step 9 delivery report indication Trigger message is not successfully delivered, and life cycle to indicate this be not disposable delivery Trigger, MTC-IWF can reach notice (reachability notification) to HSS registered UE so.If delivery report indication Trigger message is successfully delivered, MTC-IWF notification service node will transmit Trigger message again.

Wherein, if the value of life cycle is 0, this message is disposable delivery Trigger, if the value of life cycle is not 0, this message is not disposable delivery Trigger.

In order to prevent network congestion, network need to guarantee can not trigger UE under congestion scenario.So, in above-mentioned delivery flow process, when MME/SGSN transships or is congested, MME/SGSN is after receiving the Trigger message that MTC-IWF sends, be not encapsulated in NAS message and delivered to UE, but send a message to T5 interface, and to MTC-IWF indication, forbid (suppression) parameter, comprise and forbid the factor (suppression factor), forbid the duration (suppression duration) and suppression subtype.When receiving the suppression parameter that MME/SGSN sends from T5 interface, MTC-IWF thinks that Trigger message dilivery is failed, and then transship in such a way control: according to the suppression parameter receiving, carry out to trigger and forbid, thereby stop sending Trigger message to the MME/SGSN that overload occurs; With suitable cause value (caurce value), to SCS, return to failure reporting (failure report), thereby forbid that SCS/AS issues triggering message; Determine whether on the Tsp of one or more SCS interface, to carry out load and control (load control).

When MME/SGSN is during from overload (overload) state or congested (congestion) recovering state, MME/SGSN upgrades suppression parameter by T5 interface to MTC-IWF, thereby allow more Trigger message to issue, or continue to process the Trigger message from MTC-IWF.

In existing method, MTC-IWF is from MME/SGSN receives the congested information of MME/SGSN (being the above-mentioned parameter of forbidding), to think Trigger message dilivery failure, and need to be reported in the congested duration (can according to forbid duration determine) to SCS/AS, can not send descending Trigger.By SCS/AS, according to the congested duration receiving, safeguard timer, before timer expiry, no longer issue Trigger message.This by easily cause SCS/AS after congested duration disappears a large amount of descending Trigger(of burst for example SCS/AS send at once the Trigger message of all buffer memorys), or cause SCS/AS can not deliver in time descending Trigger(for example after congested duration disappears, SCS/AS slowly sends the Trigger message of buffer memory).In addition, by SCS/AS side, safeguard timer, and retransmit descending Trigger after the congested duration disappears, also increased the signaling burden of Tsp interface.And SCS/AS do not know will be transmitted by which MME/SGSN by other Trigger outside the Trigger message of congested MME/SGSN refusal, so SCS/AS safeguards timer for each UE, increased SCS/AS expense.

Summary of the invention

The object of this invention is to provide a kind of triggering message dilivery control method and equipment, to solve under service node congestion situation, Trigger message dilivery causes SCS/AS expense to increase, and after the congested duration disappears, happen suddenly a large amount of descending Trigger or descending Trigger delivery problem not in time.

The object of the invention is to be achieved through the following technical solutions:

A triggering message dilivery control method, comprising:

Machine type communication-interconnected server is delivered the triggering message from service capability server/application server by T5 interface to the service node of subscriber equipment, receives congestion control indication and congested duration that described service node returns;

Described machine type communication-interconnected server starts congestion control timer according to the described congested duration;

Described in described machine type communication-interconnected server buffer memory, trigger message;

If before described congestion control timer expiry, the life cycle of described triggering message is expired, described machine type communication-interconnected server sends and triggers message dilivery failed message to described service capability server/application server, and the described triggering message of deleting buffer memory;

If the life cycle of described triggering message is not out of date, described congestion control timer expiry, described machine type communication-interconnected server is delivered described triggering message by T5 interface again to sending described congestion control indication and the service node of congested duration;

If the life cycle of described triggering message is not out of date, and described congestion control timer is not overtime, know that the current service node of described subscriber equipment changes, described machine type communication-interconnected server is delivered described triggering message by T5 interface to the service node after changing.

Machine type communication-interconnected server, comprising:

Trigger message dilivery module, for delivering the triggering message from service capability server/application server by T5 interface to the service node of subscriber equipment;

Congested indication receiver module, congestion control indication and the congested duration for receiving described service node, returned;

Timer maintenance module, for starting timer according to the described congested duration;

Trigger message buffering module, for described in buffer memory, trigger message;

Trigger message dilivery control module, if for before described congestion control timer expiry, the life cycle of described triggering message is expired, and to described service capability server/application server, send and trigger message dilivery failed message, and the described triggering message of deleting buffer memory; If the life cycle of described triggering message is not out of date, described congestion control timer expiry, controls described triggering message dilivery module and to sending described congestion control indication and the service node of congested duration, again delivers described triggering message by T5 interface; If the life cycle of described triggering message is not out of date, and described congestion control timer is not overtime, know that the current service node of described subscriber equipment changes, control described triggering message dilivery module and to the service node after changing, deliver described triggering message by T5 interface.

A triggering message dilivery control system, comprising: the service node of machine type communication-interconnected server, service capability server/application server and subscriber equipment;

Described service capability server/application server is used for, and to described machine type communication-interconnected server, issues the triggering message for described subscriber equipment;

Described machine type communication-interconnected server is used for, and by T5 interface, to the service node of described subscriber equipment, delivers described triggering message;

The service node of described subscriber equipment is used for, and after receiving described triggering message, to described machine type communication-interconnected server, returns to congestion control indication and congested duration;

Described machine type communication-interconnected server also for:

According to described congested duration startup congestion control timer;

Described in buffer memory, trigger message;

If before described congestion control timer expiry, the life cycle of described triggering message is expired, to described service capability server/application server, send and trigger message dilivery failed message, and the described triggering message of deleting buffer memory;

If the life cycle of described triggering message is not out of date, described congestion control timer expiry, delivers described triggering message by T5 interface again to sending described congestion control indication and the service node of congested duration;

If the life cycle of described triggering message is not out of date, and described congestion control timer is not overtime, knows that the current service node of described subscriber equipment changes, and by T5 interface, to the service node after changing, delivers described triggering message.

The technical scheme that the embodiment of the present invention provides, machine type communication-interconnected server is after the congestion control indication and congested duration that receive service node, according to congested duration startup timer, and the unaccepted triggering message of buffer memory, according to the duration of the life cycle of this triggering message, timer and in this life cycle term of validity the service node of subscriber equipment whether change, trigger the delivery of message and control.Owing to safeguarding the timer starting based on the congested duration on machine type communication-interconnected server, and buffer memory triggering message, but not on service capability server/application server, safeguard that this timer and buffer memory trigger message.Therefore, after just there will not be congested duration to disappear, the burst of service capability server/application server is a large amount of to be triggered message or triggers message dilivery situations not in time, has also avoided the signaling burden of extra Tsp interface.Service capability server/application server is no longer safeguarded timer, has also just avoided extra expense.

Accompanying drawing explanation

The triggering message dilivery control method flow chart that Fig. 1 provides for the embodiment of the present invention;

The first that Fig. 2 provides for the embodiment of the present invention triggers message dilivery method Signalling exchange figure;

The second that Fig. 3 provides for the embodiment of the present invention triggers message dilivery method Signalling exchange figure;

The third triggering message dilivery method Signalling exchange figure that Fig. 4 provides for the embodiment of the present invention;

The MTC-IWF structural representation that Fig. 5 provides for the embodiment of the present invention.

Embodiment

The technical scheme that the embodiment of the present invention provides, MTC-IWF is after the congestion control indication and congested duration that receive service node, according to congested duration startup congestion control timer, and the unaccepted triggering message of buffer memory.If before described congestion control timer expiry, the life cycle of described triggering message is expired, described MTC-IWF sends and triggers message dilivery failed message to described SCS/AS, and the described triggering message of deleting buffer memory; If the life cycle of described triggering message is not out of date, described congestion control timer expiry, described MTC-IWF delivers described triggering message by T5 interface again to sending described congestion control indication and the service node of congested duration; If the life cycle of described triggering message is not out of date, and described congestion control timer is not overtime, knows that the current service node of described UE changes, and described MTC-IWF delivers described triggering message by T5 interface to the service node after changing.Owing to safeguarding the timer starting based on the congested duration on MTC-IWF, and buffer memory triggering message, but not on SCS/AS, safeguard that this timer and buffer memory trigger message.Therefore, after just there will not be congested duration to disappear, SCS/AS burst is a large amount of to be triggered message or triggers message dilivery situations not in time, has also avoided the signaling burden of extra Tsp interface.SCS/AS no longer safeguards timer, has also just avoided extra expense.

In the embodiment of the present invention, for the overdue while of life cycle of above-mentioned triggering message, the situation that the timing of congestion control timer is overtime, according to configuration in advance, MTC-IWF can send the described triggering message that triggers message dilivery failed message and delete buffer memory to described SCS/AS, or MTC-IWF also can deliver described triggering message to sending described congestion control indication and the service node of congested duration again by T5 interface.

Below in conjunction with accompanying drawing, the technical scheme that the embodiment of the present invention is provided is elaborated.

A kind of triggering message dilivery control method that the invention process provides, its implementation as shown in Figure 1, specifically comprises following operation:

Step 100, MTC-IWF deliver the triggering message from SCS/AS by T5 interface to the service node of UE.

In the embodiment of the present invention, service node can but to be not limited only to be MME/SGSN.

If the service node of UE, in overload or congestion state, after receiving this triggering message, can return to refuse information to MTC-IWF, in this refuse information, carry congestion control indication and congested duration.

Wherein, congestion control indication can but to be not limited only to be above-mentioned suppression factor, suppression subtype etc., the congested duration can but to be not limited only to be above-mentioned suppression duration.

Step 110, MT reconnaissance C-IWF receive congestion control indication and the congested duration that service node returns.

Step 120, MT reconnaissance C-IWF start congestion control timer according to this congested duration.

In the embodiment of the present invention, the timing time of the congestion control timer starting according to congested duration can be indicated duration of this congested duration, can be also indicated duration of this congested duration and pre-configured triggering message transmission time delay sum.

Step 130, the above-mentioned unaccepted triggering message of MT reconnaissance C-IWF buffer memory.

If before congestion control timer expiry, the life cycle that triggers message is expired, and execution step 140, MT reconnaissance C-IWF send and trigger message dilivery failed message to above-mentioned SCS/AS, and the above-mentioned triggering message of deleting buffer memory.

If it is not out of date to trigger the life cycle of message, congestion control timer expiry, execution step 150, MT reconnaissance C-IWF deliver above-mentioned triggering message by T5 interface again to sending congestion control indication and the service node of congested duration.

If it is not out of date to trigger the life cycle of message, and congestion control timer is not overtime, knows that the current service node of this UE changes, execution step 160, MT reconnaissance C-IWF are delivered above-mentioned triggering message by T5 interface to the service node after changing.

It should be pointed out that the sequential between above-mentioned steps 120 and step 130 is definite according to specific implementation, do not have strict sequential relationship.

In the embodiment of the present invention, to triggering the monitoring of message life cycle, can realize by timer timing.Concrete, at MTC-IWF, receive after this triggering message, according to the life cycle of carrying in message, start corresponding timer.

It is multiple that MTC-IWF knows that implementation that whether the current service node of UE changes has, and below by several preferred embodiments, describes.

In order to know whether the current service node of UE changes, receive congestion control indication that service node returns and after the congested duration, MTC-IWF can send notification request message to the HSS of UE, and the service node that this notification request message is used to indicate after this HSS changes this UE is notified to MTC-IWF.

Accordingly, in HSS side, after receiving this notification request message, the associated preservation sign of this UE is, the sign of this MTC-IWF and notice sign.After HSS knows that the current service node of UE changes, inquiry is local, and whether association is preserved the sign of this UE, the sign of MTC-IWF and notice sign.Relevant these identification informations of preserving only, the service node after the indicated MTC-IWF notice UE of sign of the MTC-IWF just preserving to association changes.

MTC-IWF sends on the basis of notification request message to the HSS of UE, and in a kind of preferred embodiment, if before congestion control timer expiry, the life cycle that triggers message is expired, and MTC-IWF sends cancellation notice request message to the HSS of this UE; If it is not out of date to trigger the life cycle of message, congestion control timer expiry, MTC-IWF sends cancellation notice request message to the HSS of this UE.In the embodiment of the present invention, this cancellation notice request message is used to indicate HSS and to this MTC-IWF, does not notify the service node after described UE changes.

Accordingly, in HSS side, receive cancellation notice request message or after MTC-IWF notifies the service node after this UE changes, delete the associated sign of this UE of preserving, the sign of this MTC-IWF and notice sign.

Based on this preferred embodiment, a kind of delivering method of T5 triggering message as shown in Figure 2, specifically comprises following operation:

Step 200, MTC-IWF receive by Tsp interface the descending Trigger message that SCS/AS sends.

In the embodiment of the present invention, from the descending Trigger message of SCS/AS referred to as Trigger message.

Step 210, MTC-IWF, according to the outside sign (external ID) of the UE carrying in Trigger message, inquire about serving MME/SGSN of this UE to the HSS of this UE.

Concrete, HSS, according to the outside sign of this UE, inquires about the IMSI of this UE, and then inquires about the MME/SGSN of this UE and inform MTC-IWF according to the IMSI of this UE.

Step 220, MTC-IWF by T5 interface to the MME/SGSN(MME/SGSN inquiring ₁) deliver above-mentioned Trigger message.

Step 230, above-mentioned MME/SGSN ₁to MTC-IWF, return to refuse information, in this refuse information, carry congestion control indication and congested duration (duration time).

Step 240, MTC-IWF start congestion control timer (timer1) according to duration time.

In this embodiment, suppose that the timing time of timer1 is duration time.

Step 250, the unaccepted Trigger message of MTC-IWF buffer memory.

Step 260, MTC send notification request message to the HSS of this UE.

It should be pointed out that between above-mentioned steps 240～260 and there is no strict sequential relationship, with specific implementation, be as the criterion.

After step 270, the notified request message of HSS, the associated preservation sign of this UE is, the sign of this MTC-IWF and notice sign.

Before if timer1 is overtime, (life time) is expired for the life cycle of above-mentioned unaccepted Trigger message, execution step 280, MTC-IWF send and trigger message dilivery failed message to above-mentioned SCS/AS, delete the above-mentioned Trigger message of buffer memory, and send cancellation notice request message to the HSS of this UE.

It should be pointed out that MTC-IWF sends and triggers message dilivery failed message to SCS/AS, the Trigger message of deleting buffer memory, and there is no strict sequential relationship between the HSS transmission cancellation notice request message of UE, with specific implementation, be as the criterion.

Step 290, HSS receive after cancellation notice request message, delete the associated sign of this UE of preserving, the sign of this MTC-IWF and notice sign.

If the life cycle of above-mentioned unaccepted Trigger message is not out of date, timer1 is overtime, and execution step 2100, MTC-IWF pass through T5 interface to MME/SGSN ₁again deliver above-mentioned triggering message, to the HSS transmission cancellation notice request message of UE.

It should be pointed out that MTC-IWF passes through T5 interface to MME/SGSN ₁again deliver above-mentioned triggering message, and there is no strict sequential relationship between the HSS transmission cancellation notice request message of UE, with specific implementation, be as the criterion.

In this case, execution step 2110, HSS receive after cancellation notice request message, delete the associated sign of this UE of preserving, the sign of this MTC-IWF and notice sign.

Step 2120, HSS know that the MME/SGSN of this UE current service changes, find that the sign of this UE is preserved in local association, the sign of this MTC-IWF and notice sign, to this MTC-IWF, notify the MME/SGSN(MME/SGSN2 after changing), and delete the sign of this UE, the sign of this MTC-IWF of associated preservation and notify sign.

If the life cycle of above-mentioned unaccepted Trigger message is not out of date, and timer1 is not overtime, receives the MME/SGSN notice after this UE changes, and execution step 2130, MTC-IWF pass through T5 interface to MME/SGSN ₂deliver above-mentioned Trigger message.

In order to know whether the current service node of UE changes, receive congestion control indication that service node returns and after the congested duration, MTC-IWF can also send to the HSS of UE the notification request message of the life cycle of carrying above-mentioned unaccepted triggering message, and the service node that this notification request message is used to indicate after this HSS changes this UE in the life cycle of this triggering message is notified to MTC-IWF.

MTC-IWF sends on the basis of the notification request message of carrying the life cycle that triggers message to the HSS of UE, in a kind of preferred embodiment, by HSS side, safeguard notice timer (timer2), and control and delete the associated sign of UE of preserving, the sign of MTC-IWF and notice sign according to this timer2.Concrete, after reception notification request message, HSS also starts timer2 according to the life cycle of carrying in notification request message; During timer2 timing, if know that the current MME/SGSN of above-mentioned UE changes, after the MME/SGSN after changing to above-mentioned MTC-IWF notice, stop timer2, and delete the associated sign of this UE of preserving, the sign of this MTC-IWF and notice sign; After timer2 is overtime, delete the associated sign of this UE of preserving, the sign of this MTC-IWF and notice sign.

Based on this preferred embodiment, the delivering method of another kind of T5 triggering message as shown in Figure 3, specifically comprises following operation:

Step 300, MTC-IWF receive by Tsp interface the descending Trigger message that SCS/AS sends.

Step 310, MTC-IWF, according to the external ID of the UE carrying in Trigger message, inquire about serving MME/SGSN of this UE to the HSS of this UE.

Concrete, HSS, according to the external ID of this UE, inquires about the IMSI of this UE, and then inquires about the MME/SGSN of this UE and inform MTC-IWF according to the IMSI of this UE.

Step 320, MTC-IWF by T5 interface to the MME/SGSN(MME/SGSN inquiring ₁) deliver above-mentioned Trigger message.

Step 330, above-mentioned MME/SGSN ₁to MTC-IWF, return to refuse information, in this refuse information, carry congestion control indication and congested duration (duration time).

Step 340, MTC-IWF start congestion control timer (timer1) according to duration time.

In this embodiment, suppose that the timing time of timer1 is duration time.

Step 350, the unaccepted Trigger message of MTC-IWF buffer memory.

Step 360, MTC send the notification request message of the life cycle of carrying above-mentioned unaccepted Trigger message to the HSS of this UE.

It should be pointed out that between above-mentioned steps 340～360 and there is no strict sequential relationship, with specific implementation, be as the criterion.

After step 370, the notified request message of HSS, the sign of this UE is preserved in association, the sign of this MTC-IWF and notice sign, and according to the life cycle initiate notification timer (timer2) carrying in notification request message.

Preferably, the timing duration of timer2 is the value of life cycle.

Before if timer1 is overtime, (life time) is expired for the life cycle of above-mentioned unaccepted Trigger message, and execution step 380, MTC-IWF send and trigger message dilivery failed message to above-mentioned SCS/AS, the above-mentioned Trigger message of deleting buffer memory.

It should be pointed out that MTC-IWF sends and triggers message dilivery failed message to SCS/AS, and there is no strict sequential relationship between the Trigger message of deletion buffer memory, with specific implementation, be as the criterion.

In this case, overtime as timer2, step 390, HSS delete the associated sign of this UE of preserving, the sign of this MTC-IWF and notice sign.

If the life cycle of above-mentioned unaccepted Trigger message is not out of date, timer1 is overtime, and execution step 3100, MTC-IWF pass through T5 interface to MME/SGSN ₁again deliver above-mentioned triggering message.

In this case, overtime as timer2, step 3110, HSS delete the associated sign of this UE of preserving, the sign of this MTC-IWF and notice sign.

In another kind of situation, step 3120, HSS know that the MME/SGSN of this UE current service changes, find that the sign of this UE is preserved in local association, the sign of this MTC-IWF and notice sign, MME/SGSN(MME/SGSN2 after changing to this MTC-IWF notice), delete the associated sign of this UE of preserving, the sign of this MTC-IWF and notice identify, and stop timer2.

If the life cycle of above-mentioned unaccepted Trigger message is not out of date, and timer1 is not overtime, receives the MME/SGSN notice after this UE changes, and execution step 3130, MTC-IWF pass through T5 interface to MME/SGSN ₂deliver above-mentioned Trigger message.

In order to make MTC-IWF know whether the current service node of UE changes, above-mentioned transmission congestion control indication and the service node of congested duration can also be after receiving triggering message, the associated sign of this UE and the sign of this MTC-IWF of preserving; The service node current as this UE changes, and sends congestion control indication, with the service node of congested duration, the sign of this UE of associated preservation and the sign of this MTC-IWF sent to the service node after variation; The sign of this UE and the sign of this MTC-IWF that service node after variation is preserved according to association, send and obtain message for the triggering of this UE to MTC-IWF.Accordingly, the life cycle of above-mentioned unaccepted triggering message is not out of date, if MTC-IWF obtains message according to the triggering of the service node from after changing, knows that the current service node of this UE changes, and MTC-IWF stops congestion control timer.

Based on this preferred embodiment, the delivering method of another kind of T5 triggering message as shown in Figure 4, specifically comprises following operation:

Step 400, MTC-IWF receive by Tsp interface the descending Trigger message that SCS/AS sends.

Step 410, MTC-IWF, according to the external ID of the UE carrying in Trigger message, inquire about serving MME/SGSN of this UE to the HSS of this UE.

Step 420, MTC-IWF by T5 interface to the MME/SGSN(MME/SGSN inquiring ₁) deliver above-mentioned Trigger message.

Step 430, above-mentioned MME/SGSN ₁to MTC-IWF, return to refuse information, and the associated sign of this UE and the sign of this MTC-IWF of preserving, congestion control indication and congested duration (duration time) in this refuse information, carried.

Step 440, MTC-IWF start congestion control timer (timer1) according to duration time.

In this embodiment, suppose that the timing time of timer1 is duration time.

Step 450, the unaccepted Trigger message of MTC-IWF buffer memory.

It should be pointed out that between above-mentioned steps 440～450 and there is no strict sequential relationship, with specific implementation, be as the criterion.

Before if timer1 is overtime, (life time) is expired for the life cycle of above-mentioned unaccepted Trigger message, and execution step 460, MTC-IWF send and trigger message dilivery failed message to above-mentioned SCS/AS, the above-mentioned Trigger message of deleting buffer memory.

If the life cycle of above-mentioned unaccepted Trigger message is not out of date, timer1 is overtime, and execution step 470, MTC-IWF pass through T5 interface to MME/SGSN ₁again deliver above-mentioned triggering message.

If the MME/SGSN of UE current service changes, perform step 480, MME/SGSN ₁the sign of this UE and the sign of this MTC-IWF that association is preserved send to the MME/SGSN(MME/SGSN after variation ₂).

Step 490, MME/SGSN ₂to MTC-IWF, send to trigger and obtain message.

Wherein, it can be that Trigger obtains message that message is obtained in this triggering, is used to indicate MTC-IWF and in response message, carries above-mentioned Trigger message.It can also be to ask the message that again triggers that message is obtained in this triggering, is used to indicate MTC-IWF and again sends Trigger message.

If the life cycle of above-mentioned unaccepted Trigger message is not out of date, and timer1 is not overtime, receives MME/SGSN ₂message is obtained in the triggering sending, and performs step 4100, passes through T5 interface to MME/SGSN ₂deliver above-mentioned Trigger message, and stop timer1.

Due to reasons such as the Trigger of SCS/AS recall, in MTC-IWF, the Trigger message of buffer memory may be deleted.Therefore, the specific implementation of step 4100 can be: MTC-IWF searches this locality and whether is cached with MME/SGSN ₂the Trigger message of request; If be cached with requested Trigger message, and what receive is that Trigger obtains message, and MTC-IWF carries this Trigger message in response message, and stops timer1; If be cached with requested Trigger message, and what receive is to ask the message that again triggers, and MTC_IWF initiates Trigger message to MME/SGSN, and stops timer1; If there is no requested Trigger message in buffer memory, MTC-IWF indicates in response message does not have Trigger message.

Step 4110, MME/SGSN ₂delete the associated sign of this UE and the sign of this MTC-IWF of preserving.

It should be pointed out that in order to make MTC-IWF know that whether the current service node of UE changes, and is not limited only to the implementation that the various embodiments described above of the present invention provide.For example, can also be HSS after the service node of knowing UE changes, the service node after initiatively changing to MTC-IWF notice.

Based on above-mentioned either method embodiment, in timer timing time, if MTC-IWF receives the triggering message that mails to congested service node, can be with reference to the implementation of step 130 ~ 160.Concrete:

During the timing of congestion control timer, MTC-IWF receives triggering message, and the current service node of object UE of determining the triggering message receiving in congestion control timer timing time is the described congestion control indication of described transmission and the service node of congested duration;

The triggering message of receiving during the timing of congestion control timer described in described MTC-IWF buffer memory;

If before described congestion control timer expiry, the life cycle of the triggering message of receiving during the timing of described congestion control timer is expired, described MTC-IWF sends and triggers message dilivery failed message to SCS/AS, and deletes the triggering message of receiving during the described congestion control timer timing of buffer memory;

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, described congestion control timer expiry, described MTC-IWF delivers to sending described congestion control indication and the service node of congested duration the triggering message of receiving during the timing of described congestion control timer by T5 interface again;

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, and described congestion control timer is not overtime, know that the current service node of described UE changes, described MTC-IWF delivers to the service node after changing the triggering message of receiving during the timing of described congestion control timer by T5 interface.

In the embodiment of the present invention, MTC-IWF substitutes SCS/AS and safeguards timer, and SCS/AS side may no longer be safeguarded timer, and, within the congested duration, SCS/AS still may send and trigger message to congested service node.At this moment, can, by above-mentioned processing procedure, by MTC-IWF, be controlled the delivery that triggers message.

Inventive concept based on same with method, the embodiment of the present invention also provides a kind of MTC-IWF, and its structure as shown in Figure 5, specifically comprises:

Trigger message dilivery module 501, for delivering the triggering message from service capability server/application server by T5 interface to the service node of subscriber equipment;

Congested indication receiver module 502, congestion control indication and the congested duration for receiving described service node, returned;

Timer maintenance module 503, for starting timer according to the described congested duration;

Trigger message buffering module 504, for described in buffer memory, trigger message;

Trigger message dilivery control module 505, if for before described congestion control timer expiry, the life cycle of described triggering message is expired, and to described service capability server/application server, send and trigger message dilivery failed message, and the described triggering message of deleting buffer memory; If the life cycle of described triggering message is not out of date, described congestion control timer expiry, controls described triggering message dilivery module 501 and to sending described congestion control indication and the service node of congested duration, again delivers described triggering message by T5 interface; If the life cycle of described triggering message is not out of date, and described congestion control timer is not overtime, know that the current service node of described subscriber equipment changes, control described triggering message dilivery module 501 and to the service node after changing, deliver described triggering message by T5 interface.

Preferably, congested indication receiver module 502 receives congestion control indication that described service node returns and after the congested duration, described triggering message dilivery control module 505 also for:

Home signature user server to described subscriber equipment sends notification request message, and the service node that described notification request message is used to indicate after described home signature user server changes described subscriber equipment is notified to described machine type communication-interconnected server.

And then, if before described congestion control timer expiry, the life cycle of described triggering message is expired, described triggering message dilivery control module 505 can also be for: the home signature user server to described subscriber equipment sends cancellation notice request message, and described cancellation notice request message is used to indicate described home signature user server and to described machine type communication-interconnected server, does not notify the service node after described subscriber equipment changes; If the life cycle of described triggering message is not out of date, described congestion control timer expiry, described triggering message dilivery control module 505 can also be for: the home signature user server to described subscriber equipment sends cancellation notice request message, and described cancellation notice request message is used to indicate described home signature user server and to described machine type communication-interconnected server, does not notify the service node after described subscriber equipment changes.

To the home signature user server of described subscriber equipment, send the notification request message of the life cycle of carrying described triggering message, the service node that described notification request message is used to indicate after described home signature user server changes described subscriber equipment in the life cycle of described triggering message is notified to described machine type communication-interconnected server.

Preferably, described life cycle is not out of date, and described congestion control timer is not overtime, described triggering message dilivery control module 505 is obtained message according to the triggering of the service node from after changing, know that the current service node of described subscriber equipment changes, described triggering message dilivery control module 505 also for:

Notify described timer maintenance module 503 to stop described congestion control timer.

On above-mentioned arbitrary equipment embodiment basis, preferably, during the timing of described congestion control timer, described triggering message dilivery control module 505 also for:

Receive triggering message, the current service node of target UE of determining the triggering message receiving in described timer timing time is the described congestion control indication of described transmission and the service node of congested duration;

Notify the triggering message of receiving during the timing of congestion control timer described in described message buffering module 504 buffer memorys;

If before described congestion control timer expiry, the life cycle of the triggering message of receiving during the timing of described congestion control timer is expired, to service capability server/application server, send and trigger message dilivery failed message, and delete the triggering message of receiving during the described congestion control timer timing of buffer memory;

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, described congestion control timer expiry, controls described triggering message dilivery module 501 and to sending described congestion control indication and the service node of congested duration, again delivers the triggering message of receiving during the timing of described congestion control timer by T5 interface;

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, and described congestion control timer is not overtime, know that the current service node of described subscriber equipment changes, control described triggering message dilivery module 501 and to the service node after changing, deliver the triggering message of receiving during the timing of described congestion control timer by T5 interface.

Design based on identical with method, the embodiment of the present invention also provides a kind of triggering message dilivery control system, comprising: the service node of MTC-IWF, SCS/AS and UE.

SCS/AS is used for, and to described MTC-IWF, issues the triggering message for described UE;

Described MTC-IWF is used for, and by T5 interface, to the service node of described UE, delivers described triggering message;

The service node of described UE is used for, and after receiving described triggering message, to described MTC-IWF, returns to congestion control indication and congested duration;

Described MTC-IWF also for:

According to described congested duration startup congestion control timer;

Described in buffer memory, trigger message;

If before described congestion control timer expiry, the life cycle of described triggering message is expired, to described SCS/AS, send and trigger message dilivery failed message, and the described triggering message of deleting buffer memory;

If the life cycle of described triggering message is not out of date, and described congestion control timer is not overtime, knows that the current service node of described UE changes, and by T5 interface, to the service node after changing, delivers described triggering message.

Preferably, the system that the embodiment of the present invention provides also comprises the HSS of described UE;

Receive congestion control indication that described service node returns and after the congested duration, described MTC-IWF also for, HSS to described UE sends notification request message, and the service node that described notification request message is used to indicate after described HSS changes described UE is notified to described MTC-IWF;

Described HSS is used for, and receives described notification request message, according to described notification request message, by the sign of the sign of described UE and described MTC-IWF and the associated preservation of notice sign.

And then described HSS can also be for:

Know that the current service node of described UE changes, find the associated sign of described UE of preserving, the sign of described MTC-IWF and notice sign are notified the service node after changing to described MTC-IWF.

If before described congestion control timer expiry, the life cycle of described triggering message is expired, described MTC-IWF can also be for:

HSS to described UE sends cancellation notice request message, and described cancellation notice request message is used to indicate described HSS and to described MTC-IWF, does not notify the service node after described UE changes;

If described life cycle is not out of date, described congestion control timer expiry, described MTC-IWF also for:

Described HSS also for:

Receive described cancellation notice request message or notify after the service node after described UE changes to described MTC-IWF, deleting the associated sign of described UE of preserving, the sign of described MTC-IWF and notice sign.

Receive congestion control indication that described service node returns and after the congested duration, described MTC-IWF also for, to the HSS of described UE, send the notification request message of the life cycle of carrying described triggering message, the service node that described notification request message is used to indicate after described HSS changes described subscriber equipment in the life cycle of described triggering message is notified to described machine type communication-interconnected server;

Described HSS is used for, and receives described notification request message, according to described notification request message, by the sign of the sign of described UE and described MTC-IWF and the associated preservation of notice sign; According to the life cycle initiate notification timer carrying in described notification message; During the timing of described notice timer, if know that the current service node of described UE changes, after service node after changing to described MTC-IWF notice, stop described notice timer, and delete the associated sign of described UE of preserving, the sign of described MTC-IWF and notice sign; After described notice timer expiry, delete the associated sign of described UE of preserving, the sign of described MTC-IWF and notice sign.

Preferably, described life cycle is not out of date, and described congestion control timer is not overtime, and described MTC-IWF obtains message according to the triggering of the service node from after changing, know that the current service node of described UE changes, described MTC-IWF also for: stop described congestion control timer.

And then, receive after described triggering message, send the indication of described congestion control and the service node of congested duration also for, the associated preservation sign of described UE and the sign of described MTC-IWF; The service node current as described UE changes, and sends described congestion control indication, with the service node of congested duration, the sign of described UE of associated preservation and the sign of described MTC-IWF sent to the service node after variation;

Service node after described variation is used for, and the sign of described UE and the sign of described MTC-IWF of according to association, preserving send and obtain message for the triggering of described UE to described MTC-IWF.

On above-mentioned any system embodiment basis, preferably, during the timing of described congestion control timer, described MTC-IWF also for:

Receive triggering message, the current service node of object UE of determining the triggering message receiving in described timer timing time is the described congestion control indication of described transmission and the service node of congested duration;

The triggering message of receiving during the timing of congestion control timer described in buffer memory;

If before described congestion control timer expiry, the life cycle of the triggering message of receiving during the timing of described congestion control timer is expired, to SCS/AS, send and trigger message dilivery failed message, and delete the triggering message of receiving during the described congestion control timer timing of buffer memory;

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, described congestion control timer expiry, delivers to sending described congestion control indication and the service node of congested duration the triggering message of receiving during the timing of described congestion control timer by T5 interface again;

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, and described congestion control timer is not overtime, know that the current service node of described UE changes, by T5 interface, to the service node after changing, deliver the triggering message of receiving during the timing of described congestion control timer.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect completely.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame on computer or other programmable devices.

Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims

1. one kind is triggered message dilivery control method, comprise: machine type communication-interconnected server is delivered the triggering message from service capability server/application server by T5 interface to the service node of subscriber equipment, receive congestion control indication and congested duration that described service node returns, it is characterized in that, also comprise:

2. method according to claim 1, is characterized in that, receives congestion control indication that described service node returns and after the congested duration, the method also comprises:

Described machine type communication-interconnected server sends notification request message to the home signature user server of described subscriber equipment, and the service node that described notification request message is used to indicate after described home signature user server changes described subscriber equipment is notified to described machine type communication-interconnected server.

3. method according to claim 2, is characterized in that, if before described congestion control timer expiry, the life cycle of described triggering message is expired, the method also comprises:

Described machine type communication-interconnected server sends cancellation notice request message to the home signature user server of described subscriber equipment, and described cancellation notice request message is used to indicate described home signature user server and to described machine type communication-interconnected server, does not notify the service node after described subscriber equipment changes;

If the life cycle of described triggering message is not out of date, described congestion control timer expiry, the method also comprises:

Described machine type communication-interconnected server sends cancellation notice request message to the home signature user server of described subscriber equipment, and described cancellation notice request message is used to indicate described home signature user server and to described machine type communication-interconnected server, does not notify the service node after described subscriber equipment changes.

4. method according to claim 1, is characterized in that, receives congestion control indication that described service node returns and after the congested duration, the method also comprises:

Described machine type communication-interconnected server sends the notification request message of the life cycle of carrying described triggering message to the home signature user server of described subscriber equipment, the service node that described notification request message is used to indicate after described home signature user server changes described subscriber equipment in the life cycle of described triggering message is notified to described machine type communication-interconnected server.

5. method according to claim 1, it is characterized in that, the life cycle of described triggering message is not out of date, and described congestion control timer is not overtime, described machine type communication-interconnected server obtains message according to the triggering of the service node from after changing, know that the current service node of described subscriber equipment changes, the method also comprises:

Described machine type communication-interconnected server stops described congestion control timer.

6. according to the method described in claim 1 ~ 4 any one, it is characterized in that, during the timing of described congestion control timer, the method also comprises:

Described machine type communication-interconnected server is received triggering message, and the current service node of target UE of determining the triggering message receiving in described timer timing time is the described congestion control indication of described transmission and the service node of congested duration;

The triggering message of receiving during the timing of congestion control timer described in described machine type communication-interconnected server buffer memory;

If before described congestion control timer expiry, the life cycle of the triggering message of receiving during the timing of described congestion control timer is expired, described machine type communication-interconnected server sends and triggers message dilivery failed message to service capability server/application server, and deletes the triggering message of receiving during the described congestion control timer timing of buffer memory;

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, described congestion control timer expiry, described machine type communication-interconnected server delivers to sending described congestion control indication and the service node of congested duration the triggering message of receiving during the timing of described congestion control timer by T5 interface again;

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, and described congestion control timer is not overtime, know that the current service node of described subscriber equipment changes, described machine type communication-interconnected server delivers to the service node after changing the triggering message of receiving during the timing of described congestion control timer by T5 interface.

7. machine type communication-interconnected server, comprising: trigger message dilivery module, for delivering the triggering message from service capability server/application server by T5 interface to the service node of subscriber equipment; Congested indication receiver module, congestion control indication and the congested duration for receiving described service node, returned, it is characterized in that, also comprise:

8. machine type communication-interconnected server according to claim 7, is characterized in that, congested indication receiver module receives congestion control indication that described service node returns and after the congested duration, described triggering message dilivery control module also for:

9. machine type communication-interconnected server according to claim 8, is characterized in that, if before described congestion control timer expiry, the life cycle of described triggering message is expired, described triggering message dilivery control module also for:

Home signature user server to described subscriber equipment sends cancellation notice request message, and described cancellation notice request message is used to indicate described home signature user server and to described machine type communication-interconnected server, does not notify the service node after described subscriber equipment changes;

If the life cycle of described triggering message is not out of date, described congestion control timer expiry, described triggering message dilivery control module also for:

Home signature user server to described subscriber equipment sends cancellation notice request message, and described cancellation notice request message is used to indicate described home signature user server and to described machine type communication-interconnected server, does not notify the service node after described subscriber equipment changes.

10. machine type communication-interconnected server according to claim 7, is characterized in that, congested indication receiver module receives congestion control indication that described service node returns and after the congested duration, described triggering message dilivery control module also for:

11. machine type communication-interconnected servers according to claim 7, it is characterized in that, described life cycle is not out of date, and described congestion control timer is not overtime, described triggering message dilivery control module is obtained message according to the triggering of the service node from after changing, know that the current service node of described subscriber equipment changes, described triggering message dilivery control module also for:

Notify described timer maintenance module to stop described congestion control timer.

12. according to the machine type communication-interconnected server described in claim 7 ~ 10 any one, it is characterized in that, during the timing of described congestion control timer, described triggering message dilivery control module also for:

Notify the triggering message of receiving during the timing of congestion control timer described in described message buffering module buffer memory;

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, described congestion control timer expiry, controls described triggering message dilivery module and to sending described congestion control indication and the service node of congested duration, again delivers the triggering message of receiving during the timing of described congestion control timer by T5 interface;

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, and described congestion control timer is not overtime, know that the current service node of described subscriber equipment changes, control described triggering message dilivery module and to the service node after changing, deliver the triggering message of receiving during the timing of described congestion control timer by T5 interface.

13. 1 kinds are triggered message dilivery control system, comprise: the service node of machine type communication-interconnected server, service capability server/application server and subscriber equipment, described service capability server/application server is used for, and to described machine type communication-interconnected server, issues the triggering message for described subscriber equipment; Described machine type communication-interconnected server is used for, and by T5 interface, to the service node of described subscriber equipment, delivers described triggering message; The service node of described subscriber equipment is used for, and after receiving described triggering message, to described machine type communication-interconnected server, returns to congestion control indication and congested duration, it is characterized in that, described machine type communication-interconnected server also for:

According to described congested duration startup congestion control timer;

Described in buffer memory, trigger message;

14. systems according to claim 13, is characterized in that, also comprise the home signature user server of described subscriber equipment;

Receive congestion control indication that described service node returns and after the congested duration, described machine type communication-interconnected server also for, home signature user server to described subscriber equipment sends notification request message, and the service node that described notification request message is used to indicate after described home signature user server changes described subscriber equipment is notified to described machine type communication-interconnected server;

Described home signature user server is used for, and receives described notification request message, according to described notification request message, by the sign of the sign of described subscriber equipment and described machine type communication-interconnected server and the associated preservation of notice sign.

15. systems according to claim 14, is characterized in that, described home signature user server also for:

Know that the current service node of described subscriber equipment changes, find the associated sign of described subscriber equipment of preserving, the sign of described machine type communication-interconnected server and notice sign are notified the service node after changing to described machine type communication-interconnected server.

16. systems according to claim 14, is characterized in that, if before described congestion control timer expiry, the life cycle of described triggering message is expired, described machine type communication-interconnected server also for:

If described life cycle is not out of date, described congestion control timer expiry, described machine type communication-interconnected server also for:

Described home signature user server also for:

Receive described cancellation notice request message or notify after the service node after described subscriber equipment changes to described machine type communication-interconnected server, deleting the associated sign of described subscriber equipment of preserving, the sign of described machine type communication-interconnected server and notice sign.

17. systems according to claim 13, is characterized in that, also comprise the home signature user server of described subscriber equipment;

Receive congestion control indication that described service node returns and after the congested duration, described machine type communication-interconnected server also for, to the home signature user server of described subscriber equipment, send the notification request message of the life cycle of carrying described triggering message, the service node that described notification request message is used to indicate after described home signature user server changes described subscriber equipment in the life cycle of described triggering message is notified to described machine type communication-interconnected server;

Described home signature user server is used for, and receives described notification request message; According to described notification request message, by the sign of the sign of described subscriber equipment and described machine type communication-interconnected server and the associated preservation of notice sign; According to the life cycle initiate notification timer carrying in described notification message; During the timing of described notice timer, if know that the current service node of described subscriber equipment changes, after service node after changing to described machine type communication-interconnected server notice, stop described notice timer, and delete the associated sign of described subscriber equipment of preserving, the sign of described machine type communication-interconnected server and notice sign; After described notice timer expiry, delete the associated sign of described subscriber equipment of preserving, the sign of described machine type communication-interconnected server and notice sign.

18. systems according to claim 13, it is characterized in that, described life cycle is not out of date, and described congestion control timer is not overtime, described machine type communication-interconnected server obtains message according to the triggering of the service node from after changing, know that the current service node of described subscriber equipment changes, described machine type communication-interconnected server also for: stop described congestion control timer.

19. systems according to claim 18, it is characterized in that, receive after described triggering message, send the indication of described congestion control and the service node of congested duration also for, the associated preservation sign of described subscriber equipment and the sign of described machine type communication-interconnected server; The service node current when described subscriber equipment changes, and sends described congestion control indication, with the service node of congested duration, the sign of described subscriber equipment of associated preservation and the sign of described machine type communication-interconnected server sent to the service node after variation;

Service node after described variation is used for, and the sign of described subscriber equipment and the sign of described machine type communication-interconnected server of according to association, preserving send and obtain message for the triggering of described subscriber equipment to described machine type communication-interconnected server.

20. according to the system described in claim 13 ~ 17 any one, it is characterized in that, during the timing of described congestion control timer, described machine type communication-interconnected server also for:

If the life cycle of the triggering message of receiving during the timing of described congestion control timer is not out of date, and described congestion control timer is not overtime, know that the current service node of described subscriber equipment changes, by T5 interface, to the service node after changing, deliver the triggering message of receiving during the timing of described congestion control timer.