WO2010031329A1

WO2010031329A1 - Method, system and device for receiving and sending instant message

Info

Publication number: WO2010031329A1
Application number: PCT/CN2009/073958
Authority: WO
Inventors: 王新勇; 朱浩鹏; 薛小潭
Original assignee: 华为技术有限公司
Priority date: 2008-09-17
Filing date: 2009-09-16
Publication date: 2010-03-25
Also published as: CN101360278A

Abstract

A method, system and device for receiving and sending instant message are provided by the embodiments of the present invention. The method includes the following steps: a mobile switching center server of a sending terminal receives the instant message from a Session Initiation Protocol (SIP) user of the sending terminal; the mobile switching center server of the sending terminal splits the instant message into a plurality of short messages, the mobile switching center server of the sending terminal sends the plurality of short messages to a mobile switching center server of a receiving terminal through a short message center so that the mobile switching center server of the receiving terminal can change a plurality of short messages into the instant message for sending to the SIP user of the receiving terminal. In the embodiments of the method, the mobile switching center server realizes that an ordinary SIP user can send and receive an ultra-long instant message in a CS network and assure the ultra-long part not lost through splitting the ultra-long instant message into a plurality of short messages for receiving and sending.

Description

Method, system and device for instant messaging

[I] This application claims the priority of the Chinese application filed on Sep. 17, 2008, with the application number 200810211304.7, entitled "A method, system and device for instant messaging", the entire contents of which are incorporated by reference. Combined in this application.

[2] Technical field

[3] The present invention relates to the field of communications technologies, and in particular, to a method, system, and device for instant messaging.

[4] Background of the invention

[5] SIP (Session Initiation Protocol) After accessing the CS (Circuit Switched Domain) network, users experience IM between SIP users.

Message, ie message) Interworking and interworking with mobile users. The current technical solutions are as follows:

[6] The instant messaging process is shown in Figure 1, which includes the following steps:

[7] Step 101, SIP user A sends an instant message to MSC Server (Mobile-services Switching)

Centre Server, Mobile Switching Center Server);

[8] Step 102, the MSC Server converts the above instant message into a short message and sends it to the SMSC (Short)

Message Service Center, Short Message Center); instant messaging is IMS (internet Protocol)

Multimedia

Subsystem, the Internet Multimedia Subsystem) The message sent and received by users in the network, and the short message is the message sent and received by the user in the CS network, and the two use different coding methods.

, the two can achieve mutual conversion.

[9] Step 103, the SMSC sends a successful response to the MSC Server;

[10] Step 104, MSC

The server converts the received SMSC's successful response into a 202 response sent to SIP User A.

[I I] The message termination process is shown in Figure 2 and includes the following steps:

[12] Step 201, the SMSC sends a short message to the MSC Server;

[13] Step 202, the MSC Server converts the short message into an instant message and sends it to the SIP user B. [14] Step 203, SIP user B sends 200 response to the MSC Server;

[15] Step 204, MSC

After receiving the 200 response message from SIP User B, the Server sends a response to the SMS to the SMSC.

[16] In the process of implementing the embodiments of the present invention, the inventors found that the following disadvantages exist in the prior art:

[17] In the prior art, after the ordinary SIP user accesses the CS network, the maximum length of the content in the instant message sent by the ordinary SIP user cannot exceed the limitation of the length of the short message after the coding domain can be allowed by the circuit domain, and the excess is exceeded. Will be discarded by the MSC Server. Therefore, MSC

The Server's limitation on the length of the short message affects the use of instant messaging by ordinary SIP users.

[18] Summary of the invention

[19] The embodiments of the present invention provide a method, system, and device for instant messaging, so that ordinary SIP users can send and receive instant messages on the CS network.

[20] The embodiment of the present invention provides a method for instant messaging, including the following steps:

[21] The sender mobile switching center server receives the instant message from the sender session initial protocol SIP user

[22] The sender mobile switching center server splits the instant message into a plurality of short messages, where each short message of the plurality of short messages carries a short message serial number information indication;

[23] The sender mobile switching center server sends the multiple short messages to the receiving mobile switching center server through the short message center, where the receiving mobile switching center server receives the multiple short messages. Then, according to the short message sequence number information, the multiple short messages are converted into instant messages and sent to the receiving SIP user.

[24] The embodiment of the present invention further provides a system for instant messaging, including a mobile switching center server, a short message center, and a receiving mobile switching center server, where:

[25] the sender mobile switching center server is configured to receive an instant message from the sender SIP user, split the instant message into a plurality of short messages, and send the multiple short messages to the a short message center, wherein each of the plurality of short messages carries a short message serial number information indication;

[26] the short message center is configured to receive multiple short messages sent by the sender mobile switching center server, and forward the multiple short messages to the receiving mobile switching center server;

[27] the receiving mobile switching center server, configured to receive the multiple short messages, according to the short message The sequence number information indicates that the multiple short messages are converted into instant messages and sent to the receiving SIP user.

[28] The embodiment of the present invention further provides a sender mobile switching center server, including:

[29] a receiving module, configured to receive an instant message from a SIP user at the sending end;

[30] a splitting module, configured to split the instant message received by the receiving module into a plurality of short messages, each short message of the plurality of short messages carrying a short message serial number information indication;

[31] The sending module is configured to send the multiple short messages obtained by the splitting module to the receiving mobile switching center server.

An embodiment of the present invention further provides a receiving mobile switching center server, including:

[33] a receiving module, configured to receive, by the sending mobile switching center server, a plurality of short messages, where each short message of the plurality of short messages carries a short message serial number information indication;

[34] The sending module is configured to send, according to the short message sequence number information, a plurality of short messages received by the receiving module into instant messages to be sent to the receiving SIP user.

[35] In the embodiment of the present invention, the mobile switching center server performs transceiving by splitting the long-length instant message into multiple short messages, so that the ordinary SIP user can send and receive the ultra-long instant message on the CS network, and can Ensure that the long part is not lost.

[36] BRIEF DESCRIPTION OF THE DRAWINGS

[37] FIG. 1 is a flow chart of a method for a message originating process in the prior art;

[38] FIG. 2 is a flow chart of a method for ending a message termination process in the prior art;

3 is a flowchart of a method for sending and receiving a message in an embodiment of the present invention;

4 is a flowchart of a method for sending and receiving a message in an embodiment of the present invention;

FIG. 5 is a structural diagram of a system for receiving and receiving a message according to an embodiment of the present invention; FIG.

6 is a structural diagram of a server of a mobile switching center in a transmitting end according to an embodiment of the present invention;

7 is a structural diagram of a receiving mobile switching center server in an embodiment of the present invention.

[44] Mode for carrying out the invention

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. . All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. [46] The embodiment of the present invention provides a method for instant messaging, as shown in FIG. 3, including the following steps: [47] Step 301, the sending end MSC Server receives an instant message from a SIP user at the sending end;

[48] Step 302, the sender MSC

The server splits the instant message into a plurality of short messages, where each short message of the plurality of short messages carries a short message serial number information indication;

[49] Step 303, sender MSC

The server sends the multiple short messages to the receiving end MSC through the short message center.

Server, where the receiving end MSC

After receiving the multiple short messages, the server converts the multiple short messages into instant messages and sends them to the receiving SIP user.

[50] In an embodiment of the invention, MSC

Server splits and sends long messages to multiple short messages for sending and receiving, so that ordinary SIP users can be in C.

The S network sends and receives super long and short messages, and can ensure that the long part is not lost.

[51] The specific process of the method for sending and receiving messages, which is also provided by the embodiment of the present invention, as shown in FIG. 4, includes the following steps:

[52] Step 401: SIP user A initiates an instant message to the sending end MSC Server.

[53] Step 402, sender MSC Server

After receiving the instant message, the SIP user access is processed, including authentication, legal check, and termination of the instant message, and the instant message is converted into a short message, and the specific conversion process includes:

[54] sender MSC

The server splits the content of the message into multiple short messages according to the short message length limit, and adds a short message serial number information indication to the multiple short messages, and the indication can be passed through UDH (User Data

Head, user data header) is added in the form of a peer, the sender MSC

The server also sets the flag of the status report request of the last one of the plurality of short messages to be valid, and sets the flag of the status report request of the other short messages of the plurality of short messages to be invalid.

[55] Specifically, MSC

After receiving the super long message from the SIP user, the server needs to complete the following processing:

[56] <1> Code conversion; [57] <2> splitting the encoded long and short message into multiple short messages according to the short message length limit;

[58] <3> Convert multiple short messages after splitting into short messages TP (Transport

Layer, transport layer) content.

[59] The following three procedures are explained separately:

[60] <1> Code Conversion:

[61] MSC

Server parses the long message content of the long message, and judges that it is all single-byte code, which is ASCII (A merican Standard Code for Information Interchange) 吋 (uniform encoding of UTF-8) ASCII), converts the long message content to GSM (Globa 1 System for Mobile

Communications, Global System for Mobile Communications) 7BIT encoding, you can also use 8BIT encoding. The short message is converted into a corresponding circuit domain coding mode.

[62] MSC

The Server parses the content of the long message, and judges that it is a multi-byte code, and converts the long message content into the UCS2 code mode.

[63] <2>

Splitting the encoded long-short message into multiple short messages according to the short message length limitation of the circuit domain; [64] One of the ways is: using the short message content length limit allowed by different coding modes of the circuit domain as The maximum length of the short message content after splitting, for example, for GSM

In the 7BIT encoding mode, the length of the long and short message content allowed is 140 bytes, and 140 bytes is taken as the maximum unit length of the split short message content. Since the short message sequence number information indicates that 6 bytes need to be occupied by the UDH header, the content of the super long and short messages can be divided into multiples according to 134 bytes, and the last short message after the split is the length of the original super long and short message content. The remainder after splitting into several 134-byte short messages may be less than 134 bytes. For the UCS2 encoding mode, the length of the long message content allowed is greater than 138 bytes (the remaining 2 bytes are needed to append the size of the UCS2 encoding BO M (Byte Order)

Mark, endian indication)), the content of the super long and short messages can be split according to 132 bytes, the remaining 6 bytes are used for UDH padding of the TP layer, and 2 bytes are used for BOM indication padding. Which BOM can be used The big endian indicates that the BOM indication is appended at the head of the content and occupies 2 bytes.

[65] 上述 Using the above split method, the maximum short message length limit allowed by the circuit domain is utilized as the maximum length of the split short message content, which can make the number of short messages after splitting less, so that Sending the split short message can occupy less system resources and save transmission time, and it is also convenient for the network side or terminal user to parse or read the short message.

[66] Of course, the following splitting methods can also be used: The network side presets the maximum length of the split short message corresponding to different encoding modes (the maximum value is only required to ensure that the short message can be allowed in different coding modes of the circuit domain) The content length limit can be, according to the maximum length of the short message after the split and the length of the encoded long and short message, the coded short message is split.

[67] There is also a splitting method, which uniformly splits the super long and short messages according to the length of the encoded long and short message (to ensure that the length of the split short message is not greater than the corresponding allowable for different encoding and decoding modes) The length of the short message can be limited, so that the length of each split short message is relatively uniform. This splitting method ensures that a short message with a relatively uniform length is obtained, which conforms to the reading habits of some users.

[68] <3> Conversion of split long message to TP layer:

[69] In the conversion process, the split long message is added with a UDH (User Data Head) containing the short message sequence number information, and the sender MSC

The server sets the flag of the status report request of the last short message of the plurality of short messages to be valid.

And setting the flag of the status report request of the other short messages in the plurality of short messages to be invalid. The status report request is the TP SRR of the short message (Transport Layer Status Report

Request, transport layer status report request) parameter, if the TP is in a short message

The SRR parameter is set to be valid. After receiving the short message, the SMSC will send a receipt to the sending SIP user. If the TP is in a short message

The SRR parameter is set to be invalid, and the SMS will not send a receipt to the sending SIP user after receiving the short message.

[70] Step 403: The sending end MSC Server sends the converted multiple short messages to the SMSC.

[71] Step 404: After receiving the foregoing multiple short messages, the SMSC generates an immediate message returning policy according to the identifier bits of the status report request of the multiple short messages, that is, after waiting for the last one of the multiple short messages to be sent successfully.

, then return a short message receipt to SIP User A. [72] Step 405: The SMSC sends the multiple short messages to the receiving end MSC Ser _Ver .

[73] Step 406, receiving end MSC

The server determines the user type of the receiving end. If the receiving end user is a mobile user, the multiple short messages are sent to the mobile user. If the receiving end user is the SIP user B, the process proceeds to step 407.

[74] Step 407, Receiver MSC

The server converts multiple short messages into instant messages, and sends the instant messages to the SIP user B; the receiving end M

SC

Server can convert multiple short messages into multiple instant messages, or combine multiple short messages into one instant message.

[75] Converting to multiple instant messages can avoid the long interval between multiple short messages sent by the SMSC. If all the split short messages are collected and then combined into one and sent to SIP user B, the user cannot吋 Received a message, so the receiving end MSC

After receiving any one of the multiple short messages, the server may generate a prompt message sequence number according to the short message carrying the short message sequence number information, and then add the message to the immediate message header, and then send the message to the receiving device. End SIP user.

[76] Consolidating into one instant message is consistent with the user's reading habits.

[77] Step 408: After receiving the foregoing instant message, the SIP user B may identify the split instant message by using the immediate message sequence number indication, and return a success response message to the SMSC.

[78] Step 409: The SMSC receives the successful response, and according to the immediate message returning policy, after receiving the last successful response corresponding to the message, the instant message receipt is generated.

[79] Step 410: The SMSC sends the instant message receipt to the SIP user A through the sending end MSC Server.

[80] The beneficial effects brought by the technical solutions of the embodiments of the present invention are as follows:

[81] 1. Provided MSC

Server converts long-length and instant-message messages into multiple short-message messages, so that ordinary SIP terminals that do not support automatic packet splitting and long-length instant messaging can send and receive long-length and instant messages on the CS network, and can guarantee long-length messages. Part is not lost.

[82] 2. Providing MSC

_Server multiple splitting methods, using the maximum short message length limit allowed by the circuit domain as the split The maximum length of the short message content can make the number of short messages after splitting less, so that sending the split short message can occupy less system resources and save transmission time, and the network is also convenient. The side or end user parses or reads the short message; the uniform split mode ensures that the split message after the split is more uniform, which is consistent with the reading habits of some users.

[83] 3. Provided MSC

The method of adding a message sequence number to the header of multiple instant messages by the server solves the problem of poor performance of sending multiple instant messages.

[84] 4, receiving end MSC

Server converts multiple short messages into multiple instant messages, which can avoid the long interval between multiple short messages sent by SMSC. If all the short messages are collected, they are merged into one and sent to SIP users.

B, the user cannot receive the message; the receiving end MSC

Server can also convert multiple short messages into one instant message, which is in line with the user's reading habits.

[85] 5, the receiving end MSC Server converts multiple short messages into multiple instant messages, and also provides MSC

Server flexible control of the message receipt function method, solves the problem that SIP users send a single message to receive multiple transmission status reports.

[86] The embodiment of the present invention further provides a system for instant messaging, as shown in FIG. 5, including: a sending end

MSC Server 501, short message center 502, and receiving end MSC Server 503, where:

[87] the transmitting end MSC

The server 501 is configured to receive the instant message from the sender SIP user, split the instant message into a plurality of short messages, and send the multiple short messages to the short message center 502, where the multiple Each short message in the short message carries a short message serial number information indication;

[88] the short message center 502 is configured to receive the sending end MSC

a plurality of short messages sent by Ser _Ver 501, and forwarding the plurality of short messages to the receiving end MSC

Server503;

[89] the receiving end MSC

The server 503 is configured to receive the multiple short messages, and convert the multiple short messages into instant messages to be sent to the receiving SIP user according to the short message sequence number information indication.

[90] wherein, the sending end MSC The Ser _Ver 501 is further configured to set an identifier of a status report request of the last one of the plurality of short messages to be valid, and set an identifier of a status report request of the other short messages of the multiple short messages to invalid;

Correspondingly, the short message center 502 is further configured to generate a prompt message returning policy according to the identifier of the status report request of the plurality of short messages, where the message returning policy includes: a status report request, that is, a short message TP SRR parameter, if the TP is in a short message

The SRR parameter is set to be invalid, and the SMS will not send a receipt to the sending SIP user after receiving the short message. Subsequently, according to the instant message returning policy, after receiving the successful response corresponding to the last instant message, the instant message return is returned to the sending SIP user.

[92] In a specific application, the foregoing sending end MSC Server 501 and receiving end MSC

Ser _Ve r 503 can be physically located in one device or in different devices, and the above changes do not affect the scope of protection of the present invention.

[93] The embodiment of the present invention provides a system for sending and receiving a short message, which is divided into multiple short messages for sending and receiving, so that ordinary SIP users can send and receive long-length instant messages on the CS network. And can guarantee that the long part is not lost.

An embodiment of the present invention further provides a transmitting end MSC.

The server, as shown in FIG. 6, includes: a receiving module 601, configured to receive a prompt message from a SIP user at the sending end; a splitting module 602, configured to split the instant message received by the receiving module 601 into multiple pieces. a short message, each of the plurality of short messages carries a short message sequence number information indication; the sending module 603 is configured to send the multiple short messages obtained by the splitting module 602 to the receiving end MSC Server

[95] The splitting module 602 includes: a first splitting unit 604, configured to: after the instant message is encoded and converted to obtain a short message, the short message length allowed by different coding modes of the circuit domain Limiting the maximum value of the length of the short message after the splitting, and obtaining a plurality of short messages of the minimum number; or, the second splitting unit _{605 is} configured to encode and convert the instant message to obtain a short message, according to the encoding The length of the converted ultra-long and short message is evenly split. The length of the split short message does not exceed the limit of the short message length allowed by the encoding mode. [96] wherein, the sending end MSC

The server further includes: an identifier bit setting module 606, configured to send, by the sending module 603, the plurality of short messages obtained by the splitting module 60 2 to the receiving end MSC

Before the server, the flag of the status report request of the last short message of the plurality of short messages is set to be valid, and the flag of the status report request of the other short messages of the plurality of short messages is set to be invalid.

[97] The embodiment of the present invention provides a transmitting end MSC by providing

Server, by splitting a long-length instant message into multiple short messages, enables ordinary SIP users to send long-length instant messages on the CS network, and can ensure that the long part is not lost.

An embodiment of the present invention further provides a receiving end MSC.

The server, as shown in FIG. 7, includes: a receiving module 701, configured to receive the MSC from the sending end.

a plurality of short messages of the server, where each of the plurality of short messages carries a short message sequence number information indication; the sending module 702 is configured to, according to the short message sequence number information, indicate that the receiving module 701 receives multiple short messages. The message is converted to an instant message sent to the receiving SIP user.

[99] The sending module 702 includes: a first sending unit 703, configured to: according to the short message sequence number information indication, convert the multiple short messages into multiple pieces, that is, send the message to the receiving end SIP user; Alternatively, the second sending unit 704 is configured to, according to the short message sequence number information indication, merge the multiple short messages into one instant message and send the message to the receiving SIP user.

[100] The first sending unit 703 includes: a sequence number generating sub-unit 705, configured to generate, according to the short message sequence number information carried by the multiple short messages, a generated message sequence number; The plurality of short messages are converted into a plurality of instant messages, and the immediate message sequence numbers generated by the sequence number generating sub-unit _{705 are} added to the plurality of instant message headers.

An embodiment of the present invention provides a receiving end MSC by providing

The server sends the short message to multiple SIP messages to the receiving SIP user, so that the ordinary SI P user can receive the super long instant message on the CS network, and can ensure that the long part is not lost.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware, or can be realized by means of software plus necessary general hardware platform, the present invention. The technical solution can be embodied in the form of a software product. Stored in a computer readable storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to execute the present The methods described in the various embodiments are invented.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

[1] A method for instant messaging, characterized in that it comprises the following steps:

The sending mobile switching center server receives the instant message of the session initial protocol SIP user; the sending mobile switching center server splits the instant message into a plurality of short messages, wherein each of the multiple short messages The short message carries the short message sequence number information indication; the sender mobile switching center server sends the multiple short messages to the receiving mobile switching center server through the short message center, where the receiving mobile switching center server receives After the multiple short messages are sent, the multiple short messages are converted into instant messages according to the short message sequence number information, and sent to the receiving SIP user.

[2] The method according to claim 1, wherein the splitting the mobile switching center server splits the instant message into a plurality of short messages, including:

The instant message is encoded and converted to obtain a short message of the circuit domain coding mode, and the length of the short message after the code conversion is determined to be too long, and the instant message is split into a plurality of short messages.

[3] The method according to claim 2, wherein the splitting the instant message into a plurality of short messages comprises:

The instant message is split into a plurality of short messages according to the limitation of the short message length allowed by the circuit domain coding mode.

[4] The method according to claim 3, wherein the instant message is split into a plurality of short messages according to a limitation of a short message length that can be allowed by the converted circuit domain coding mode. The message includes:

Determining the length of the short message length allowed by the circuit domain coding mode as the maximum value of the split short message length, and obtaining a minimum number of short messages; or

The coded converted short message is evenly split, wherein the length of each short message after splitting does not exceed the limit of the short message length allowed by the converted circuit domain coding mode.

[5] The method according to claim 1, wherein the short message sequence number information is indicated in the form of a user data header UDH.

[6] The method according to claim 1, wherein the receiving mobile switching center server converts the plurality of short messages into instant messages and sends the message to the receiving end SIP user, including: The receiving mobile switching center server converts the plurality of short messages into multiple pieces of short messages according to the short message sequence number information, and sends the message to the receiving end SIP user; or the receiving end mobile switching center server according to the The short message sequence number information indicates that the multiple short messages are combined into one message, and the message is sent to the receiving SIP user.

[7] The method according to claim 6, wherein the receiving mobile switching center server converts the plurality of short messages into a plurality of instant messages according to the short message sequence number information indication, and sends the message to the receiving End SIP users include:

The receiving mobile switching center server generates a prompt message sequence number according to the short message sequence number information carried by the plurality of short messages;

The receiving mobile switching center server converts the plurality of short messages into a plurality of short messages, and adds the instant message serial number to the plurality of instant messaging headers, and the multiple instant messages are sent Send to the receiving SIP user.

[8] The method according to claim 1, wherein the splitting the mobile switching center server splits the instant message into a plurality of short messages further includes:

The sender mobile switching center server sets the flag of the status report request of the last one of the plurality of short messages to be valid, and reports the status of the request for the status of the other short messages in the multiple short messages. Set to invalid;

Correspondingly, the short message center generates a prompt message returning policy according to the identifier of the status report request of the plurality of short messages, where the message returning policy is to receive the last one of the plurality of short messages. After a successful response, the instant message receipt is returned.

[9] The method according to claim 8, wherein the method further comprises:

After receiving the plurality of instant messages, the receiving SIP user returns a success response message; the short message center according to the instant message returning policy, after receiving the success response message corresponding to the last instant message , return the instant message receipt to the sending SIP user.

[10] A system for instant messaging, characterized in that it comprises a mobile switching center server at the transmitting end

, a short message center and a receiving mobile switching center server, where:

The sending mobile switching center server is configured to receive a prompt message from a SIP user of the sending session initial protocol, split the instant message into a plurality of short messages, and send the multiple short messages Sending to the short message center, where each short message of the plurality of short messages carries a short message serial number information indication;

The short message center is configured to receive a plurality of short messages sent by the sending mobile switching center server, and forward the multiple short messages to the receiving mobile switching center server; and the receiving mobile switching center The server is configured to receive the multiple short messages, and convert the multiple short messages into instant messages to be sent to the receiving SIP user according to the short message sequence number information indication.

[11] The system according to claim 10, wherein the sender mobile switching center server is further configured to set an identifier of a status report request of the last one of the plurality of short messages to be valid, Setting an identifier of a status report request of the other short messages in the plurality of short messages to be invalid;

Correspondingly, the short message center is further configured to generate a prompt message returning policy according to the identifier of the status report request of the plurality of short messages, where the message returning policy is received in the plurality of short messages. After the successful response of the last one, the instant return message is returned; after receiving the last successful response corresponding to the last message, the subsequent return message is sent to the sending SIP user.

[12] A sender mobile switching center server, comprising:

a receiving module, configured to receive a prompt message from a sender session initial protocol SIP user; a splitting module, configured to split the instant message received by the receiving module into multiple short messages, where the multiple short messages are Each short message carries a short message serial number information indication;

The sending module is configured to send the multiple short messages obtained by the splitting module to the receiving mobile switching center server.

[13] The sender mobile switching center server according to claim 12, wherein the split module comprises:

a first splitting unit, configured to: after the short message of the circuit domain coding mode is obtained by encoding and converting the instant message, determining that the length of the coded converted short message is too long, and the circuit domain coding mode is The allowable short message length limit is used as the maximum value of the split short message length to obtain a minimum number of short messages; or

a second splitting unit, configured to encode and convert the instant message to obtain a circuit domain coding mode After the short message, it is determined that the length of the short message after the code conversion is too long, and the short message after the code conversion is uniformly split, wherein the length of each short message after the split does not exceed the circuit domain code The limitation of the length of the short message that the mode can allow.

[14] The sender mobile switching center server according to claim 12, wherein the device further comprises:

a flag setting module, configured to report a status report of a last one of the plurality of short messages before the sending module sends the plurality of short messages obtained by the splitting module to the receiving mobile switching center server The flag bit is set to be valid, and the flag of the status report request of the other short messages in the plurality of short messages is set to be invalid.

[15] A receiving mobile switching center server, comprising:

a receiving module, configured to receive a plurality of short messages from the mobile switching center server of the sending end, where each short message of the multiple short messages carries a short message serial number information indication;

And a sending module, configured to send, according to the short message sequence number information, a plurality of short messages received by the receiving module into instant messages to be sent to the receiving SIP user.

[16] The receiving mobile switching center server according to claim 15, wherein the sending module comprises:

a first sending unit, configured to, according to the short message sequence number information indication, convert the plurality of short messages into multiple pieces, that is, send the message to the receiving end SIP user; or

And a second sending unit, configured to send, according to the short message sequence number information indication, the plurality of short messages into one message, and send the message to the receiving SIP user.

[17] The receiving mobile switching center server according to claim 16, wherein the first sending unit comprises:

a sequence number generating sub-unit, configured to generate, according to the short message sequence number information carried in each of the plurality of short messages, the instant message sequence number;

Converting the adding subunit, converting the plurality of short messages into a plurality of instant messages, and adding the instants generated by the sequence generating subunits in the header of each of the plurality of instant messages Message sequence number.