CN101111004B - Short message routing method and apparatus based on MAP protocol - Google Patents
Short message routing method and apparatus based on MAP protocol Download PDFInfo
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- CN101111004B CN101111004B CN2007101479051A CN200710147905A CN101111004B CN 101111004 B CN101111004 B CN 101111004B CN 2007101479051 A CN2007101479051 A CN 2007101479051A CN 200710147905 A CN200710147905 A CN 200710147905A CN 101111004 B CN101111004 B CN 101111004B
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Abstract
The present invention discloses a short message routing method based on the MAP protocol. The present invention comprises the following procedure: an operation maintenance module transfers rules for the signaling processing module disposition route; and when the signaling processing module detects that all the service processing modules of the local short message center are ineffective, and the signaling processing module transfers short messages to the signaling processing module of the corresponding short message center in a MAP protocol form according to target short message center address in the route transferring rules. The short message routing device of the present invention based on the MAP protocol comprises a plurality of signaling processing modules, a service possessing module, a SMPP protocol agent module, and an operation maintenance module. The progress of the system service processing capability load sharing diversification can be obtained through the method of the present invention, the particular short message is accomplished by the short message center equipped particularly, the system processing efficiency is enhanced, the stability and the security of the system processing are strengthened, and the equipment expenditure under the condition of unequal resources is saved.
Description
Technical field
The present invention relates to the field of mobile communication of various mobile communcations systems such as GSM, 3G, relate to the method and apparatus of the short message route in the field of mobile communication particularly.
Background technology
Along with being extensive use of of short message service, the disposal ability of short-message system is being improved constantly, and in actual motion, the short message telephone traffic comes and go: usual telephone traffic may be seldom, but to just sharply surge festivals or holidays; Some short message service center's traffic carrying capacity is few, and some short message service center's traffic carrying capacity is many; And short message service center also has the danger of system crash once in a while.How reasonable, effective resource allocation reaches system stability, safety, trouble-free operation, the focal issue that has just become each tame operator to pay close attention to.
Current, each operator generally adopts improves that interstitial content reaches the purpose that the whole system disposal ability promotes in node processing ability and the increase system.But this scheme still can not effectively be taken precautions against the disaster risk of short message center system collapse.
1. when certain short message service center delivered overload under some special sight, the traffic messages that continues can not in time be loaded to divide was downloaded to other idle relatively short message service center; 2. because the message communication of self-defined (non-standard) is adopted in each system equipment merchant short message service center inside, short message service center of different system equipment vendor can not directly share the overload telephone traffic of other short message service center; 3. for some special short message, may need the particular arrangement and the processing of short message service center, particular arrangement is all done by all short message service centers and processing requirements is unrealistic, at this moment need to specify wherein a cover to do particular arrangement and processing requirements separately, but can't accomplish at the MAP Signaling Layer the identification of these special short messages.
Summary of the invention
Make the present invention according to the problems referred to above, for this reason, the object of the present invention is to provide short message routing method based on MAP.
According to the short message routing method based on MAP of the present invention, may further comprise the steps: operating maintenance module is a signaling processing module configuration routing forwarding rule; And detect all Service Processing Modules of local short message service center when invalid when signaling processing module, signaling processing module is forwarded to short message the signaling processing module of corresponding short message service center according to the target SMS service center address in the routing forwarding rule with MAP.
In the method, the routing forwarding rule comprises with calling number establishment routing table, unites the establishment routing table with called number establishment routing table and with calling number and called number.
According to another short message routing method based on MAP of the present invention, may further comprise the steps: operating maintenance module is a Service Processing Module configuration routing forwarding rule; Service Processing Module is checked whether overload of short message service center; If short message service center's overload then according to the routing forwarding rule, judges whether short message needs to carry out route; And carry out route if desired, short message is transmitted.
In the method, short message is transmitted comprised: Service Processing Module sends to short message and target SMS service center address the signaling processing module of local short message service center; And signaling processing module is forwarded to short message the signaling processing module of corresponding short message service center with MAP according to the target SMS service center address.
In addition, in the method, also comprise: if not overload of short message service center is then carried out authentication to short message.
In addition, in the method, short message is carried out authentication comprise: Service Processing Module receives short message from signaling processing module, extracts calling number and called number from short message, and calling number and called number are carried out authentication.
In addition, in the method, also comprise: if authentication by and judge described short message is that particular service is handled short message, then according to the routing forwarding rule, judges whether short message needs to carry out route, and according to judged result short message is sent.Do not need to carry out route if judge short message, then Service Processing Module sends to the signaling processing module of local short message service center in the mode of load sharing with short message, and sends to user terminal by No.7 nation-wide Network.Need carry out route if judge short message, then Service Processing Module sends to the signaling processing module of local short message service center with short message and target SMS service center address, and signaling processing module is forwarded to short message the signaling processing module of corresponding short message service center with MAP according to the target SMS service center address.
In addition, in the method, also comprise:,, judge whether short message needs to carry out route then according to the routing forwarding rule if descend the short-message sending failure first; And if judge that short message does not need to carry out route, then Service Processing Module sends short message once more by No.7 nation-wide Network to user terminal, otherwise short message is transmitted.
In addition, in the method, short message transmitted comprise: Service Processing Module sends to short message and target SMS service center address the signaling processing module of local short message service center; And signaling processing module is forwarded to short message the signaling processing module of corresponding short message service center with MAP according to the target SMS service center address.
In addition, in the method, the routing forwarding rule comprises with calling number establishment routing table, with called number establishment routing table, unites the establishment routing table, works out routing table and work out routing table with special field in the message to issue failure code first with calling number and called number.
According to the short message route device based on MAP of the present invention, comprise: a plurality of signaling processing modules, link to each other and interconnection each other with Signalling Transfer Point, be used for carrying out the mutual of short message with MAP and No.7 nation-wide Network, handle short message, and the short message between a plurality of signaling processing module is transmitted; Service Processing Module is used for carrying out alternately with signaling processing module and SMPP agency by agreement module, and storage is also transmitted short message; SMPP agency by agreement module is connected Service Processing Module with outside Short Message Entity, be used for short message is carried out SMPP agreement or MAP conversion; And operating maintenance module, be used to signaling processing module and Service Processing Module configuration routing rule and other short message service center's service parameter.
By method and apparatus of the present invention, obtained the diversified progress of system business disposal ability load load sharing, short message service center by particular arrangement finishes to special short message, improved the efficient of system handles, strengthen stability, the fail safe of system handles, saved the equipment expense under the unequal situation of resource.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 shows the flow chart based on the short message routing method of MAP according to the embodiment of the invention;
Fig. 2 shows according to another embodiment of the present invention the flow chart based on the short message routing method of MAP;
Fig. 3 shows the structure chart based on the short message route device of MAP according to the embodiment of the invention;
Fig. 4 shows the position view of short message service center in network based on MAP short message route technology according to the embodiment of the invention;
Fig. 5 shows the flow chart according to the routing forwarding under all Service Processing Module failure conditions in the short message service center of the embodiment of the invention;
Fig. 6 shows the flow chart according to the routing forwarding under Service Processing Module system of the short message service center overload situation of the embodiment of the invention;
Fig. 7 shows the routing forwarding flow chart under specific characteristic short message (as long message, special prefix caller short message, the called short message of the special prefix etc.) prerequisite of having according to the embodiment of the invention; And
Fig. 8 shows the flow chart that issues the short message routing forwarding under the failure scenarios first according to the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Fig. 1 shows the flow chart based on the short message routing method of MAP according to the embodiment of the invention.As shown in Figure 1, may further comprise the steps: step S102, operating maintenance module is a signaling processing module configuration routing forwarding rule; And step S104, when signaling processing module detects all Service Processing Modules of local short message service center when invalid, signaling processing module is forwarded to short message the signaling processing module of corresponding short message service center according to the target SMS service center address in the routing forwarding rule with MAP.
In the method, the routing forwarding rule comprises with calling number establishment routing table, unites the establishment routing table with called number establishment routing table and with calling number and called number.
Fig. 2 shows according to another embodiment of the present invention the flow chart based on the short message routing method of MAP.As shown in Figure 2, may further comprise the steps: step S202, operating maintenance module is a Service Processing Module configuration routing forwarding rule; Step S204, Service Processing Module check whether overload of short message service center; Step S206 is if short message service center's overload then according to the routing forwarding rule, judges whether short message needs to carry out route; And step S208, carry out route if desired, short message is transmitted.
In the method, short message is transmitted comprised: Service Processing Module sends to short message and target SMS service center address the signaling processing module of local short message service center; And signaling processing module is forwarded to short message the signaling processing module of corresponding short message service center with MAP according to the target SMS service center address.
In addition, in the method, also comprise: if not overload of short message service center is then carried out authentication to short message.
In addition, in the method, short message is carried out authentication comprise: Service Processing Module receives short message from signaling processing module, extracts calling number and called number from short message, and calling number and called number are carried out authentication.
In addition, in the method, also comprise: if authentication by and judge described short message is that particular service is handled short message, then according to the routing forwarding rule, judges whether short message needs to carry out route, and according to judged result short message is sent.Do not need to carry out route if judge short message, then Service Processing Module sends to the signaling processing module of local short message service center in the mode of load sharing with short message, and sends to user terminal by No.7 nation-wide Network.Need carry out route if judge short message, then Service Processing Module sends to the signaling processing module of local short message service center with short message and target SMS service center address, and signaling processing module is forwarded to short message the signaling processing module of corresponding short message service center with MAP according to the target SMS service center address.
In addition, in the method, also comprise:,, judge whether short message needs to carry out route then according to the routing forwarding rule if descend the short-message sending failure first; And if judge that short message does not need to carry out route, then Service Processing Module sends short message once more by No.7 nation-wide Network to user terminal, otherwise short message is transmitted.
In addition, in the method, short message transmitted comprise: Service Processing Module sends to short message and target SMS service center address the signaling processing module of local short message service center; And signaling processing module is forwarded to short message the signaling processing module of corresponding short message service center with MAP according to the target SMS service center address.
In addition, in the method, the routing forwarding rule comprises with calling number establishment routing table, with called number establishment routing table, unites the establishment routing table, works out routing table and work out routing table with special field in the message to issue failure code first with calling number and called number.
Fig. 3 shows the structure chart based on the short message route device of MAP according to the embodiment of the invention.As shown in Figure 3, comprising: a plurality of signaling processing modules, link to each other and interconnection each other with Signalling Transfer Point (HSTP), be used for carrying out the mutual of short message with MAP and No.7 nation-wide Network, handle short message, and the short message between a plurality of signaling processing module is transmitted; Service Processing Module is used for carrying out alternately with signaling processing module and SMPP agency by agreement module, and storage is also transmitted short message; SMPP agency by agreement module is connected Service Processing Module with outside Short Message Entity (ESME), be used for short message is carried out SMPP agreement or MAP conversion; And operating maintenance module, be used to signaling processing module and Service Processing Module configuration routing rule and other short message service center's service parameter.
Signaling processing module: link to each other with the Signalling Transfer Point in the network, be used for receiving, handle short message and it is transmitted to the Service Processing Module of short message service center with internal agreement from No.7 nation-wide Network; Receive simultaneously, handle following short-message sending, simultaneously result is transmitted to No.7 nation-wide Network with the MAP form from Service Processing Module.
Service Processing Module: receive short message from signaling processing module, and store, transmit short message; When needed, short message is transmitted to SMPP agency by agreement module by the SMPP agreement.
SMPP agency by agreement module: link to each other with ESME with the Service Processing Module of short message service center, the short message that ESME is worked the SMPP protocol format of exhaling is transmitted to Service Processing Module by internal form and handles, and the while sends to ESME to the message of the internal form that the service processor module forwards is come by the SMPP protocol format.
Operating maintenance module: configuration routing rule and other short message service center's service parameter.
Support is carried out the prerequisite that short message transmits based on the short message service center of MAP short message route technology and is comprised:
When (1) all Service Processing Modules all lost efficacy in the short message service center;
(2) during the short message center system overload;
When (3) short message first dispatching is failed;
(4) (such as long message) during the service needed special processing.
The forwarding of short message is mainly carried out in support according to the following rule based on the short message service center of MAP short message route technology:
(1) ANumber scheme: with calling number establishment routing table;
(2) BNumber scheme: with called number establishment routing table;
(3) A-BNumber scheme: unite the establishment routing table with the calling and called number;
(4) FDA scheme: to issue failure code establishment routing table first;
(5) LongSM scheme: with special field establishment routing table in the message.
This route technology is supported to transmit (configurable) to the poll of other short message service center simultaneously.
Wherein, hardware module partly comprises: each overlaps short message service center's configuration signal processing module at least, Service Processing Module, SMPP agency by agreement module, each one of operating maintenance module.
Fig. 4 shows the position view of short message service center in network based on MAP short message route technology according to the embodiment of the invention.As shown in Figure 4, short message center system is by two covers or overlap short message service center more and form, and each short message service center is connected between a plurality of Signalling Transfer Points (HSTP) and outside Short Message Entity (ESME) in the network, and each short message service center also can be directly interconnected.In two net biplanes two cover short message service center, emerging short-message system ZTE SC (1) not only is connected and a plurality of Signalling Transfer Points (HSTP1 and HSTP2) and a plurality of ESME with ZTE SC (2) promptly, also direct interconnection between the two, even can also other short message service center of direct interconnection (Other SC).
Support comprises the following module based on the short message service center of MAP short message route technology: signaling processing module (IW/GMSC), Service Processing Module (Serv), SMPP agency by agreement module (SMPP Agent), operating maintenance module etc. (OMM), each intermodule all adopt Fast Ethernet to carry out communication.
Fig. 5 shows the flow chart according to the routing forwarding under all Service Processing Module failure conditions in the short message service center of the embodiment of the invention.As shown in Figure 5:
Be signaling processing module configuration short message routing configuration table at first: to guarantee and Service Processing Module that this signaling processing module is direct-connected short message route under the fault prerequisite all by operating maintenance module.The routing configuration table can be according to A-BNumber scheme, ANumber scheme, BNumber arrangements.
When signaling processing module receives the short message that Signalling Transfer Point sends in the network, check and all direct-connected Service Processing Modules own;
If the Service Processing Module operating state is normal, then short message original calling is arrived one of them Service Processing Module (the normal prerequisite of operating state) according to the load sharing principle, this works the process of exhaling and finishes;
If Service Processing Module is fault all, check configuration: whether need short message is forwarded to other short message service center;
If do not need to transmit, then short message original calling failure, this works the process of exhaling and finishes;
If need to transmit, then check routing configuration table (order is according to A-BNumber scheme, ANumber scheme, BNumber scheme matched rule), obtain the target SMS service center address that this short message need be transmitted;
If obtain the failure of target SMS service center address, then short message original calling failure, this works the process of exhaling and finishes;
If obtain the success of target SMS service center address, then this short message directly is transmitted to target short message service center (signaling processing module) by the MAP form, this works the process of exhaling and finishes.
Fig. 6 shows the flow chart according to the routing forwarding under Service Processing Module system of the short message service center overload situation of the embodiment of the invention.As shown in Figure 6:
By operating maintenance module is Service Processing Module configuration short message routing configuration table: the short message route of Service Processing Module under system's overload situation.The routing configuration table can be according to arrangements such as LSM, A-BNumber, ANumber, BNumber.
When Service Processing Module received the short message that signaling processing module sends over, the check system load condition was if overload is checked configuration: whether need short message is forwarded to other short message service center;
If do not need to transmit, then locally handle rising to call for and asking of short message, this process finishes;
If need to transmit, check routing configuration table (order is checked according to LSM scheme, A-BNumber scheme, ANumber scheme, BNumber scheme), obtain the target SMS service center address that this short message need be transmitted;
If obtain target SMS service center address failure, then locally handle rising to call for and asking of short message, this works the process of exhaling and finishes;
If obtain target SMS service center address success, then the signaling processing module of this this short message service center of SMS terminal call, and the target SMS service center address that need transmit of indication signaling processing module;
Signaling processing module directly is transmitted to target short message service center (signaling processing module) to this short message by the MAP form, and this works the process of exhaling and finishes.
Fig. 7 shows the routing forwarding flow chart under specific characteristic short message (as long message, special prefix caller short message, the called short message of the special prefix etc.) prerequisite of having according to the embodiment of the invention.As shown in Figure 7:
By operating maintenance module is Service Processing Module configuration short message routing configuration table: Service Processing Module is to short message route with route characteristics-as to the route of long message, to route with particular prefix caller, to having called route of particular prefix or the like.The routing configuration table can be according to arrangements such as LSM, A-BNumber, ANumber, BNumber.
When Service Processing Module receives the short message that signaling processing module sends over, though system not overload or overload but message be not forwarded, then continue authentication (as number section authentication, but the authentication of not chargeing) to calling and called;
If failed authentication, this message calling request failure is returned wrong rising and is exhaled response, and this process finishes;
If authentication is passed through, check configuration: whether need short message is forwarded to other short message service center;
If do not need to transmit, then locally handle rising to call for and asking of short message, this process finishes;
Transmit if need, check routing configuration table (order is checked according to LSM scheme, A-BNumber scheme, ANumber scheme, BNumber scheme), see whether current short message satisfies routing rule, from the rule that satisfies condition, obtain the target SMS service center address that this short message need be transmitted;
If obtain target SMS service center address failure, then locally handle rising to call for and asking of short message, this works the process of exhaling and finishes;
If obtain target SMS service center address success, then the signaling processing module of this this short message service center of SMS terminal call, and the target SMS service center address that need transmit of indication signaling processing module;
Signaling processing module directly is transmitted to target short message service center (signaling processing module) to this short message by the MAP form, and this works the process of exhaling and finishes.
Fig. 8 shows the flow chart that issues the short message routing forwarding under the failure scenarios first according to the embodiment of the invention.As shown in Figure 8:
By operating maintenance module is Service Processing Module configuration short message routing configuration table: Service Processing Module is to issuing the short message route of failure first.The routing configuration table is according to the FDA arrangements.
When Service Processing Module receives the MT response of signaling processing module, check configuration if issue failure first: whether need short message is forwarded to other short message service center;
If do not need to transmit, exhale response then local end of handling short message, and this process finishes;
If need to transmit, check routing configuration table (FDA scheme), obtain the target SMS service center address that this short message need be transmitted;
If obtain the failure of target SMS service center address, exhale response then local end of handling short message, this works the process of exhaling and finishes;
If obtain target SMS service center address success, then the signaling processing module of this this short message service center of SMS terminal call, and the target SMS service center address that need transmit of indication signaling processing module;
Signaling processing module directly is transmitted to target short message service center (signaling processing module) to this short message by the MAP form, and this works the process of exhaling and finishes.
Table 1, table 2, table 3 are that routing rule disposes simple description list.
Table 1
| Rule index | The rule classification | Caller prefix/error code | Called prefix |
| 1 | Long | X | X | |
| 2 | ANumber | 861397 | X | |
| 3 | ANumber | 861384 | X | |
| 3 | BNumber | X | 861382 | |
| 4 | BNumber | X | 861389 | |
| 5 | A_BNumber | 861384 | 861392 | |
| 6 | A_BNumber | 861390 | 861380 | |
| 7 | FDA | 1 | X | |
| 8 | FDA | 2 | X |
Table 2
| Rule index | The rule classification | The caller prefix | Called prefix |
| 9 | ANumber | 861377 | X |
| 10 | ANumber | 861374 | X |
| 11 | BNumber | X | 861372 |
| 12 | BNumber | X | 861379 |
| 13 | A_BNumber | 861374 | 861372 |
| 14 | A_BNumber | 861370 | 861370 |
| 15 | Long message | X | X |
Table 3
| Rule index | Route SC1 | Route | Route SCn | ||
| 1 | 8613800210500 | 8613800250500 | 8613800100500 | ||
| 2 | 8613800210500 | X | X |
In sum, sequentially described above under the short message center system overload prerequisite, under the particular service short message prerequisite and descend routing forwarding scheme under the short-message sending failure prerequisite first.It should be appreciated by those skilled in the art that it is exemplary that three kinds of routing forwarding schemes are combined to form complete flow process by said sequence, but other combination of these three kinds of routing forwarding schemes also can realize the present invention.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the short message routing method based on MAP is characterized in that, may further comprise the steps:
Operating maintenance module is a Service Processing Module configuration routing forwarding rule;
Described Service Processing Module is checked whether overload of short message service center;
If the overload of described short message service center then according to described routing forwarding rule, judges whether short message needs to carry out route; And
Carry out route if desired, described short message is transmitted;
If not overload of described short message service center, then described short message is carried out authentication, if authentication by and judge that described short message is that particular service is handled short message, then according to described routing forwarding rule, judge whether described short message needs to carry out route, and according to judged result described short message is sent, described particular service is handled short message finish by the short message service center of particular arrangement.
2. the short message routing method based on MAP according to claim 1 is characterized in that, described short message is transmitted comprise:
Described Service Processing Module sends to described short message and target SMS service center address the signaling processing module of local short message service center; And
Described signaling processing module is forwarded to described short message the signaling processing module of corresponding short message service center with described MAP according to described target SMS service center address.
3. the short message routing method based on MAP according to claim 1 is characterized in that, describedly described short message is carried out authentication comprises:
Described Service Processing Module receives short message from signaling processing module, extracts calling number and called number from described short message, and described calling number and described called number are carried out authentication.
4. the short message routing method based on MAP according to claim 1, it is characterized in that, do not need to carry out route if judge described short message, then described Service Processing Module sends to the signaling processing module of local short message service center in the mode of load sharing with described short message, and sends to user terminal by No.7 nation-wide Network.
5. the short message routing method based on MAP according to claim 1, it is characterized in that, need carry out route if judge described short message, then described Service Processing Module sends to the signaling processing module of local short message service center with described short message and target SMS service center address, and described signaling processing module is forwarded to described short message the signaling processing module of corresponding short message service center with described MAP according to described target SMS service center address.
6. according to claim 1 or 4 described short message routing methods, it is characterized in that, also comprise based on MAP:
If issue described short message failure first,, judge whether described short message needs to carry out route then according to described routing forwarding rule; And
Do not need to carry out route if judge described short message, then described Service Processing Module sends described short message once more by No.7 nation-wide Network to described user terminal, otherwise described short message is transmitted.
7. the short message routing method based on MAP according to claim 6 is characterized in that, described short message is transmitted comprise:
Described Service Processing Module sends to described short message and target SMS service center address the signaling processing module of local short message service center; And
Described signaling processing module is forwarded to described short message the signaling processing module of corresponding short message service center with described MAP according to described target SMS service center address.
8. the short message routing method based on MAP according to claim 7, it is characterized in that described routing forwarding rule comprises with calling number establishment routing table, with called number establishment routing table, unites the establishment routing table, works out routing table and work out routing table with special field in the message to issue failure code first with calling number and called number.
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| CN101695174A (en) * | 2009-10-22 | 2010-04-14 | 中兴通讯股份有限公司 | System and method for monitoring short message centre |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1419382A (en) * | 2001-11-14 | 2003-05-21 | 深圳市中兴通讯股份有限公司上海第二研究所 | Short message original calling control gateway |
| CN1527618A (en) * | 2003-03-04 | 2004-09-08 | 深圳市中兴通讯股份有限公司上海第二 | Short message center system with double-network double-plane structure |
| CN1679353A (en) * | 2002-08-26 | 2005-10-05 | Sk电信有限公司 | Method for processing address of short message service center in IMT-2000 asynchronous network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419382A (en) * | 2001-11-14 | 2003-05-21 | 深圳市中兴通讯股份有限公司上海第二研究所 | Short message original calling control gateway |
| CN1679353A (en) * | 2002-08-26 | 2005-10-05 | Sk电信有限公司 | Method for processing address of short message service center in IMT-2000 asynchronous network |
| CN1527618A (en) * | 2003-03-04 | 2004-09-08 | 深圳市中兴通讯股份有限公司上海第二 | Short message center system with double-network double-plane structure |
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