CN100417243C - Method and system for obtaining presentation information - Google Patents

Abstract

The present invention discloses a method for acquiring presence information, comprising: a mobile terminal initiates a call to a presentity terminal; a mobile switching center that processes the call directly or indirectly sends presence information request information to a presence server, and the presence information request information includes the presentity Terminal ID, mobile terminal ID; the presence server authenticates the presence information request information according to the presence information authorization setting, and sends the presence information conforming to the presence information authorization setting through the mobile switching center or service control point as a short message or A multimedia message is returned to the mobile terminal. The invention also discloses a system for acquiring presence information, which includes a mobile terminal, a mobile switching center and a presence server. According to the present invention, a method for providing presence information to a mobile terminal through a short message or a multimedia message is provided during a call, so that even a mobile terminal without the presence terminal function can conveniently obtain the called presence information.

Description

Method and system for obtaining presentation information

technical field

The present invention relates to communication technology, in particular to a method and system for acquiring presentation information.

Background technique

Presentation service (PRESENCE SERVICE) is a communication service for collecting and distributing presentation information (PRESENCE INFORMATION). Currently, it is usually provided together with instant message service (INSTANT MESSAGE SERVICE). Of course, presentation service can also be provided separately, or with other services Such as the combination of online games. The Internet Engineering Task Force IETF, the Open Mobile Alliance OMA and other international standard organizations have preliminarily formulated the corresponding standard specifications for presentation services, which are being continuously improved. The present invention mainly uses the terminology in RFC 2778, and the one that provides the presence information to the presence service is called the presentity (PRESENTITY), and the one that requests the presentation information from the presence service is called the watcher (WATCHER). Existing presence information generally includes user name, communication address, network status information (online, offline), application status information (idle or active) and user terminal status information (available or busy). Presentation information released by the terminal.

FIG. 1 shows a system structure diagram of an existing presence service system for providing presence information, as shown in FIG. 1 . It can be seen from the figure that the existing system includes:

The presence server, and the presence terminal connected to it, the presence terminal includes two types of presentity terminal and viewer terminal. The presentity terminal includes: a presentity and a presentity user agent (PRESENCEUSER AGENT). The watcher terminal includes: watcher and watcher user agent (WATCHERUSER AGENT).

Presence information is transmitted between the presentity terminal and the presence server where the presentity or observer is located through the presence protocol (PRESENCE PROTOCOL).

The presentity user agent serves as a means for the presentity user to interact with the system, and the presentity publishes presence information to the presence server through the presentity user agent.

The watcher user agent acts as a means for the watcher user to interact with the system, and the watcher receives the presence information sent by the presence server through the watcher user agent.

Fig. 2 shows a flow chart of presenting services. The process of acquiring presentation information in the prior art will be described below with reference to FIG. 2 .

Step 201, the presentity terminal publishes presence information to the presence server;

Step 202, the observer terminal sends a request for subscribing presence information to the presence server;

Step 203, the presence server sends a subscription confirmation notification to the presentity terminal;

Step 204, the presentity terminal returns a message agreeing to subscribe to the presence information to the presence server;

Step 205, the presence server sends presence information to the watcher terminal according to the authorization rules set by the presentity terminal.

It can be known from the above prior art that the watcher user must acquire presence information through the presence terminal and the presence protocol. In this way, many users who use mobile terminals without the presence terminal function (such as mobile terminals that only support the second-generation mobile communication technology 2G at present) cannot obtain the presence information they need.

Contents of the invention

The purpose of the present invention is to provide a method and system for obtaining presence information, which can enable mobile terminals without the presence terminal function to obtain presence information.

The present invention provides a method for acquiring presentation information, including:

A. The mobile switching center receives the call initiated by the mobile terminal to the presentity terminal;

B. The mobile switching center processes the call and sends presence information request information to the presence server;

C. The presence server returns the presence information of the presentity terminal to the mobile terminal in the form of a short message or a multimedia message via the presence information intermediary device.

The step C is: the presence server authenticates the presence information request information according to the presence information authorization setting, and returns the presence information conforming to the presence information authorization setting to the mobile terminal through the presence information intermediary device after passing the authentication.

The step B is: when the mobile switching center processes the call, it first reports the call to the service control point, and then the service control point sends the presence information request to the presence server.

The presence information intermediary device is a mobile switching center, and the presence server returning the presence information of the presentity terminal to the mobile terminal in step C further includes: the presence server first sends the presence information to the mobile switching center, and the mobile switching center then sent to the mobile terminal.

The mobile switching center sends the presence information to the mobile terminal in the form of short message or multimedia message.

The presence information intermediary device is a service control point, and the step C in which the presence server returns the presence information of the presentity terminal to the mobile terminal further includes: the presence server first sends the presence information to the service control point, and the service control point then sent to the mobile terminal.

The service control point sends the presence information to the mobile terminal in the form of short message or multimedia message.

The step B is: the mobile switching center processes the call, judges whether the status information of the presentity terminal is idle, and if it is idle, proceeds according to the normal call flow; otherwise, sends the presence information request information to the presence server.

The mobile switching center reports the call to the SCP when processing the call. The SCP obtains the state information of the presentity terminal before requesting the roaming number of the presentity terminal to the HLR, and judges whether the state information of the presentity terminal is idle. If it is idle, the normal call is made. Otherwise, the SCP sends the presence information request information to the presence server.

The present invention also provides a system for acquiring presentation information, including:

a mobile terminal, configured to initiate a call to the presentity terminal and receive presence information;

The mobile switching center is used to process the call initiated by the mobile terminal, send the presence information request information to the presence server, receive the presence information returned by the presence server, and send the received presence information to the mobile terminal in the form of short message or multimedia message;

The presence server is configured to store the presence information issued by the presentity terminal, and send the presence information of the presentity terminal to the mobile switching center.

The mobile switching center also includes:

a presence information acquisition unit, configured to send presence information request information to the presence server when the mobile switching center receives a call from the mobile terminal, and receive presence information returned by the presence server;

The presence information sending unit is configured to send the received presence information to the mobile terminal in the form of a short message or a multimedia message.

The present invention also provides a system for acquiring presentation information, including:

a mobile terminal, configured to initiate a call to the presentity terminal and receive presence information;

The mobile switching center is used to report to the service control point when receiving a call from the mobile terminal, receive the presence information sent by the service control point, and send the received presence information to the mobile terminal in the form of a short message or a multimedia message;

The service control point is used to process the call reported by the mobile switching center, send the presence information request information to the presence server, receive the presence information returned by the presence server, and send the received presence information to the mobile switching center;

The presence server is configured to store the presence information issued by the presentity terminal, and send the presence information of the presentity terminal to the service control point.

The present invention also provides a system for acquiring presentation information. When the presentation information of a presentity changes, the system includes:

a mobile terminal, configured to initiate a call to the presentity terminal and receive presence information;

The mobile switching center is used to report to the service control point when receiving a call from the mobile terminal;

The service control point is used to process the call reported by the mobile switching center, send presence information request information to the presence server, receive the presence information returned by the presence server, and send the received presence information to the mobile terminal in the form of short message or multimedia message ;

The presence server is configured to store the presence information issued by the presentity terminal, and send the presence information of the presentity terminal to the service control point.

The service control points also include:

a presence information acquisition unit, configured to send presence information request information to the presence server, and receive presence information returned by the presence server;

The presence information sending unit is used to send the received presence information to the mobile terminal in the form of short message or multimedia message.

The present invention also provides a method for acquiring presentation information, the method comprising the steps of:

D. The presence server sends the presence information to the presence information intermediary device;

E. The presence information intermediary device sends the received presence information to the mobile terminal in the form of a short message or a multimedia message.

The presence information intermediary device is any combination of the following devices: mobile switching center, service control point, short message center, multimedia message center, and application server.

Before step D, filter conditions for the mobile terminal to receive presence information are set, and in step D, the presence server sends the presence information to the presence information intermediary device according to the filter conditions.

According to the present invention, the present invention provides a method and system for acquiring presence information, so that the presence server can send presence information to the mobile terminal in the form of short message or multimedia message through the presence information intermediary device, so that even the mobile terminal without the presence terminal function can The mobile terminal can conveniently obtain the presence information.

Description of drawings

FIG. 1 shows a network diagram of presenting services in the prior art;

Fig. 2 shows a flow chart of realizing the presentation service in the prior art;

FIG. 3 shows a flow chart of obtaining presentation information in the present invention;

Fig. 4 shows a flow chart of obtaining presence information through authorization settings in the present invention;

Fig. 5 shows another flow chart of obtaining presentation information in the present invention;

Fig. 6 shows another flow chart of obtaining presentation information in the present invention;

Fig. 7 shows another flow chart of obtaining presentation information in the present invention;

Fig. 8 shows a flow chart of actively providing presence information to a mobile terminal in the present invention.

Detailed ways

In order to make it easier for those skilled in the art to understand and realize the present invention, the embodiments of the present invention are described in conjunction with the accompanying drawings.

The invention discloses a method for acquiring presence information. A mobile terminal calls a presentity terminal that releases presence information, and a mobile switching center directly or indirectly sends presence information request information to a presence server. The presence server sets the presence information according to the presence information set by the presentity terminal. The authorization setting returns the presence information issued by the presentity terminal, and the mobile terminal receives the above presence information through a short message or a multimedia message. FIG. 3 shows a basic flowchart of obtaining presence information by a mobile terminal according to the present invention. The method for obtaining presence information will be described in detail below with reference to FIG. 3 .

Step 301. Before obtaining the presence information, the presentity terminal sets the authorization setting of the presence information, that is, sets who can obtain the presence information of what scope.

Presence information authorization setting is a pre-established presence information publishing policy of the presentity terminal. The presence information authorization setting includes an authorization list and an authorization scope. The authorization list indicates which terminals can obtain presence information, and the authorization scope indicates the release of presence information. The presence server determines which mobile terminals can provide which presence information of the presentity terminal according to the presence information authorization setting.

Authorization settings can be configured using Extensible Markup Language XML, for example, the sub-element contained in the "identity" element can be used to specify the authorized mobile terminal identity:

<identity>

<id entity="13048907033"/>

<id entity="13760463639"/>

</identity>

The above indicates that the mobile terminal IDs, that is, the mobile terminals with the phone numbers "13048907033" and "13760463639" are authorized to obtain the presence information of the presentity, and there may be multiple mobile terminal IDs to form an authorization list. Similarly, some control elements can be used in the "content" element to limit which presentation information to provide, that is, the scope of authorization, such as:

<content>

<provide-place-is>true</provide-place-is>

<provide-mood>true</provide-mood>

</content>

As indicated above, the scope of authorization is to provide location information and mood information in the presence information. The authorization list and authorization scope can be used in combination, that is, the authorization scope is correspondingly set for an authorization list. In order to provide different content presentation information to different people more precisely, multiple "rule" elements can be used in a presentity's authorization setting file, where each "rule" element includes an "identity" and "content" element , so that it can control the presentation information of different content provided to different authorization lists.

As shown in FIG. 4 , the process of deciding to publish presence information by using the presence information authorization setting is described below. In step 401, the presence server obtains the presence information authorization setting of the called presentity terminal; in step 402, the presence server judges whether the presence information of the calling mobile terminal is provided according to the authorization setting, and if so, executes step 404 : Provide the presence information of the presentity terminal, otherwise, perform step 403: return, prompting that there is no presence information of the presentity terminal.

Step 302, the mobile terminal initiates a call to the presentity terminal.

Step 303, the calling end office MSC (Mobile Switching Center) requests the home location register HLR to obtain the roaming number of the presentity terminal.

Step 304, the HLR returns the roaming number of the presentity terminal to the calling end office MSC.

Step 305: The calling end office MSC calls the presence terminal according to the roaming number, and at the same time sends presence information request information to the presence server. The presence information request information includes a presentity terminal identifier and a mobile terminal identifier.

Step 306, the presence server queries the presence information authorization setting of the presentity terminal according to the presence information request information.

Step 307, the presence server returns the presence information to the MSC according to the presence information authorization setting.

Step 308, the MSC sends the presence information carried by the short message to the mobile terminal.

In fact, usually when the called presentity terminal is busy, powered off, out of service area, or has no answer, it cannot communicate with the calling user. At this time, the calling party needs to obtain the presence information of the presentity terminal. Therefore, in the above step 305, the MSC of the calling end office may continue the normal call process without sending a presence information request to the presence server when receiving the status information of the called party as being idle after calling the presence terminal according to the roaming number. information; and the presence information request information is sent to the presence server only when the status information of the called party is busy, power off, out of service area, no response, etc.

According to the present invention, in the intelligent network, the presence information can also be obtained through the SCP (Service Control Point), as shown in FIG. 5 , the process for the mobile terminal to obtain the presence information is as follows.

Step 501. Before acquiring presence information, the presentity terminal sets presence information authorization settings. The presence information authorization setting is basically the same as that described above, and its description is omitted here.

Step 502, the mobile terminal initiates a call to the presentity terminal.

Step 503, the MSC of the calling end office reports the call to the SCP.

Step 504, the SCP requests the HLR for the roaming number of the presentity terminal.

Step 505, the HLR returns the roaming number of the presentity terminal to the SCP.

In step 506, the SCP instructs the calling end office MSC to call the presence terminal according to the roaming number, and at the same time, the SCP sends presence information request information to the presence server.

Step 507, the presence server queries the presence information authorization setting of the presentity terminal according to the presence information request information.

Step 508, the presence server returns the presence information to the SCP according to the presence information authorization setting.

Step 509, the SCP returns the presence information to the MSC.

Step 510, the MSC sends the presence information carried by the short message to the mobile terminal.

According to the present invention, after obtaining the presence information through the SCP (service control point) in the intelligent network, the SCP can directly send the presence information to the mobile terminal, as shown in FIG. 6 , the process for the mobile terminal to obtain the presence information is as follows.

Step 601. Before acquiring the presence information, the presentity terminal sets the presence information authorization setting. The presence information authorization setting is basically the same as that described above, and its description is omitted here.

Step 602, the mobile terminal initiates a call to the presentity terminal.

Step 603, the MSC of the calling end office reports the call to the SCP.

Step 604, the SCP requests the HLR for the roaming number of the presentity terminal.

Step 605, the HLR returns the roaming number of the presentity terminal to the SCP.

Step 606, the SCP instructs the calling end office MSC to call the presence terminal according to the roaming number, and meanwhile the SCP sends presence information request information to the presence server.

Step 607, the presence server queries the presence information authorization setting of the presentity terminal according to the presence information request information.

Step 608, the presence server returns the presence information to the SCP according to the presence information authorization setting.

Step 609, the SCP sends the presence information carried in the short message to the mobile terminal.

Also in the above two intelligent network embodiments, it is considered that the calling party needs to obtain the caller only when the called presentity terminal is busy, powered off, not in the service area, and has no answer, and cannot communicate with the calling user. Presence information of the presentity terminal. Therefore, in the above step 506 or 606, when the SCP receives the status information of the called party as idle, it can continue the normal call process without sending the presence information request information to the presence server; and when the status information of the called party is busy, The presence information request information is sent to the presence server only when the machine is turned off, not in the service area, or there is no response. In order to save signaling interaction and improve the efficiency of the system to process calls, it is also possible to obtain the status information of the presentity terminal before the SCP requests the roaming number of the presentity terminal from the HLR, and decide whether to send presence information request information to the presence server according to whether the status information is idle , as shown in Figure 7, the specific steps are as follows:

Step 701. Before obtaining the presence information, the presentity terminal sets the presence information authorization setting.

Step 702, the mobile terminal initiates a call to the presentity terminal.

Step 703, the MSC of the calling end office reports the call to the SCP.

Step 704, the SCP sends an arbitrary time query to the HLR to which the called user belongs, and the HLR sends a request for providing user information to the called end office after receiving it, and the called end office pages the presentity terminal, and sends the current state of the presence terminal Sent to HLR.

Step 705, the HLR sends the current state of the presentity terminal to the SCP.

Step 706, the SCP judges whether the current state of the presentity terminal is idle, and if not, executes step 707; otherwise, requests the roaming number of the presentity terminal to the HLR, performs normal call processing, and ends.

Step 707, the SCP sends the presence information request message to the presence server.

Step 708, the presence server queries the presence information authorization setting of the presentity terminal according to the presence information request information.

Step 709, the presence server returns the presence information to the SCP according to the presence information authorization setting.

Step 710, the SCP sends the presence information carried by the short message to the mobile terminal.

In addition to providing the presence information to the mobile terminal when it initiates a call, the presence information may also be actively provided to the mobile terminal, such as when the presence information of the presentity changes. Similarly, considering that the mobile terminal does not support the presence function and cannot receive presence information through the presence protocol, the presence server first sends the presence information to the presence information intermediary device, and then the presence information intermediary device sends the presence information to the mobile terminal. The presence information intermediary device may be a mobile switching center, a service control point, a short message center, a multimedia message center, an application server, and the like.

As shown in Figure 8, the following describes the process of actively providing presentation information to the mobile terminal, and the specific steps are as follows:

Step 801, the presentity terminal sets the presence information authorization setting.

Step 802, subscribe the mobile terminal to the presence information of the presentity terminal. The mobile terminal can subscribe via short message, Internet, etc., and the subscription information is stored on the presence server; the presentity terminal can also actively subscribe to the presence information for the mobile terminal. The subscription information includes a presentity terminal identifier, a mobile terminal identifier, content of subscribed presence information, and the like.

Step 803, the presentity terminal updates the presence information to the presence server.

Step 804, the presence server sends the presence information to the presence information intermediary device.

Step 805, the presence information intermediary device sends the presence information to the mobile terminal.

In fact, all the presence information of the presentity terminal does not need to be sent to the mobile terminal, and can be released selectively. Set filter conditions for the mobile terminal on the presence server to specify which presence information the mobile terminal should receive. The filter conditions can be set in XML , use the "what" element to limit which presentation information to receive, such as:

<filter uri="13048907033"><what>

<include>mood</include>

<include>status</include>

</what></filter>

As above, the filter condition "filter" set for the mobile terminal "13048907033" uses the "include" element to set the presentation information to include the attributes of mood "mood" and status "status". A "what" element can contain multiple "include". The filtering conditions are stored in the presence server, and the presence server is provided with a filtering device to filter the presence information sent to the mobile terminal according to the filtering conditions. In addition to specifying which presence information the mobile terminal will receive, the filter condition can also set which changes in the presence information need to be notified to the mobile terminal, limited by the "changed" element, such as:

<changed>mood</changed>

It means that when the "mood" attribute of the presence information changes, the presence server will immediately send the updated mood "mood" information to the mobile terminal through the presence information intermediary device. You can further use the "from" and "to" attributes to limit which specific values are changed before sending the rendering information:

<changed to="open">status</changed>

Indicates that the presence information is sent when the status "status" information becomes available "open". In this way, the mobile terminal can only receive the presence information when the transmission of some information concerned by the mobile terminal changes, such as when the mood of the user of the presentity terminal changes, or when the mobile terminal changes from being powered off to being available.

According to the XML settings of the following filter conditions, the presence server sends the presentity's mood "mood" and activity "activities" presence information to the mobile terminal through the presence information intermediary device when the "activities" transmission changes. Of course, the presentity terminal identifier (or the presentity user name corresponding to the presentity terminal identifier stored on the presence server) and the presence information will also be sent to the mobile terminal at the same time, so that the mobile terminal can identify the presence corresponding to the presence information. body.

<filter uri="13048907033">

<what>

<include>mood</include>

<include>activities</include>

</what>

<changed>activities</changed>

</filter>

In addition, according to the present invention, the presence information sent to the mobile terminal can also be carried by a multimedia message. The method for obtaining presence information when carried by a multimedia message is described below.

The presence information intermediary device such as the service control point sends the presence information to the MMSC (Multimedia Message Center) through the multimedia message interface protocol MM7, and the MMSC sends the presence information to the mobile terminal. In addition, the MMSC can judge whether the user terminal can support MMS, and perform corresponding processing according to the bearing capacity of the user terminal (such as display resolution, terminal capacity, etc.). For example, when the user terminal does not support the MMS function, the MMSC will forward the multimedia message to the e-mail box and remind the user through a short message.

Presence information sent in short messages and multimedia messages may include the presence terminal identification, status, and remarks of the presentity (such as "in a meeting"), etc. The content of the presence information can refer to the relevant standard RFC3863 of IETF, "Presence Information Data Format (PIDF)" ("Presence Information Data Format"), and RPID (Rich Presence Extensions to the Presence Information Data Format) documents, etc. The above presentation information such as "mood", "activities", and "status" are described in detail in the documents of the SIMPLE group of IETF.

The invention also discloses a system for acquiring presence information, which includes a mobile terminal, MSC (Mobile Switching Center), SCP (Service Control Point) and a presence server. The systems of the present invention are described separately below.

The mobile terminal is used to initiate a call to the presentity terminal and receive presence information.

The MSC is used to send presence information request information to the presence server or report the call to the SCP, receive the presence information sent by the presence server or the SCP, and send the received presence information to the mobile phone in the form of a short message (or multimedia message) terminal. The MSC includes: a presence information acquisition unit, configured to send presence information request information to the presence server when the mobile switching center receives a call from the mobile terminal, and receive presence information returned by the presence server; a presence information sending unit, configured to Send the received presence information to the mobile terminal in the form of message or multimedia message.

The SCP is used to process the call reported by the MSC and send the presence information request to obtain the presence information from the presence server, and send the presence information to the MSC or directly to the mobile terminal in the form of a short message (or multimedia message). The SCP includes: a presence information acquisition unit, configured to send presence information request information to the presence server, and receive presence information returned by the presence server; a presence information sending unit, configured to send the received presence information in the form of a short message or a multimedia message sent to the mobile terminal.

The presence server is configured to store the presence information of the presentity terminal, and send the presence information of the presentity terminal to a presence information intermediary device such as MSC or SCP. The presence information intermediary device may be a mobile switching center, a service control point, a short message center, a multimedia message center, an application server, etc., and the modes supported by the mobile terminal may be short messages, multimedia messages, and the like.

According to the present invention, a method and a system for acquiring presence information are provided, so that the presence server sends presence information to the mobile terminal through the presence information intermediary device in a manner supported by most mobile terminals at present, such as short message or multimedia message, so that even if it does not have A mobile terminal with a presence terminal function can conveniently obtain presence information.

Although the present invention has been described by the embodiments, those of ordinary skill in the art know that, without departing from the spirit and essence of the present invention, the present invention can have many modifications and variations, and the scope of the present invention is defined by the appended rights Requirements to limit.

Claims (17)

1. A method for obtaining presentation information, comprising: A. The mobile switching center receives the call initiated by the mobile terminal to the presentity terminal; B. The mobile switching center processes the call and sends presence information request information to the presence server; C. The presence server returns the presence information of the presentity terminal to the mobile terminal in the form of a short message or a multimedia message via the presence information intermediary device. 2. The method for obtaining presence information according to claim 1, wherein the step C is: the presence server authenticates the presence information request information according to the presence information authorization setting, and after the authentication passes, it will comply with The presence information set by the presence information authorization is returned to the mobile terminal via the presence information intermediary device. 3. The method for obtaining presence information according to claim 1, characterized in that, said step B is: when the mobile switching center handles the call, it first reports the call to the service control point, and then the service control point will present the information request sent to the rendering server. 4. The method for acquiring presence information according to claim 1, wherein the presence information intermediary device is a mobile switching center, and in the step C, the presence server returns the presence information of the presentity terminal to the mobile terminal It further includes: the presence server first sends the presence information to the mobile switching center, and the mobile switching center then sends it to the mobile terminal. 5. The method for acquiring presence information according to claim 4, wherein the mobile switching center sends the presence information to the mobile terminal in the form of a short message or a multimedia message. 6. The method for acquiring presence information according to claim 1, wherein the presence information intermediary device is a service control point, and in step C, the presence server returns the presence information of the presentity terminal to the mobile terminal It further includes: the presence server first sends the presence information to the service control point, and the service control point sends it to the mobile terminal. 7. The method for acquiring presence information according to claim 6, wherein the service control point sends the presence information to the mobile terminal in the form of a short message or a multimedia message. 8. The method for obtaining presence information according to any one of claims 1 to 7, wherein the step B is: the mobile switching center processes the call, and judges whether the status information of the presentity terminal is idle, if it is idle Then proceed according to the normal call flow; otherwise, the presence information request message is sent to the presence server. 9. The method for obtaining presence information according to claim 8, wherein the mobile switching center reports the call to the service control point when processing the call, and the service control point obtains the roaming number of the presentity terminal before requesting the home location register The state information of the presentity terminal determines whether the state information of the presentity terminal is idle, and if it is idle, it is processed according to the normal call flow; otherwise, the service control point sends the presence information request information to the presence server. 10. A system for obtaining presentation information, comprising: a mobile terminal, configured to initiate a call to the presentity terminal and receive presence information; The mobile switching center is used to process the call initiated by the mobile terminal, send the presence information request information to the presence server, receive the presence information returned by the presence server, and send the received presence information to the mobile terminal in the form of short message or multimedia message; The presence server is configured to store the presence information issued by the presentity terminal, and send the presence information of the presentity terminal to the mobile switching center. 11. system according to claim 10, is characterized in that, mobile switching center also comprises: a presence information acquisition unit, configured to send presence information request information to the presence server when the mobile switching center receives a call from the mobile terminal, and receive presence information returned by the presence server; The presence information sending unit is configured to send the received presence information to the mobile terminal in the form of a short message or a multimedia message. 12. A system for obtaining presentation information, comprising: a mobile terminal, configured to initiate a call to the presentity terminal and receive presence information; The mobile switching center is used to report to the service control point when receiving a call from the mobile terminal, receive the presence information sent by the service control point, and send the received presence information to the mobile terminal in the form of a short message or a multimedia message; The service control point is used to process the call reported by the mobile switching center, send the presence information request information to the presence server, receive the presence information returned by the presence server, and send the received presence information to the mobile switching center; The presence server is configured to store the presence information issued by the presentity terminal, and send the presence information of the presentity terminal to the service control point. 13. A system for obtaining presentation information, comprising: a mobile terminal, configured to initiate a call to the presentity terminal and receive presence information; The mobile switching center is used to report to the service control point when receiving a call from the mobile terminal; The service control point is used to process the call reported by the mobile switching center, send presence information request information to the presence server, receive the presence information returned by the presence server, and send the received presence information to the mobile terminal in the form of short message or multimedia message ; The presence server is configured to store the presence information issued by the presentity terminal, and send the presence information of the presentity terminal to the service control point. 14. The system according to claim 13, wherein the service control point also includes: a presence information acquisition unit, configured to send presence information request information to the presence server, and receive presence information returned by the presence server; The presence information sending unit is used to send the received presence information to the mobile terminal in the form of short message or multimedia message. 15. A method for obtaining presentation information, characterized in that, when the presentation information of the presentity changes, the method comprises the steps of: D. The presence server sends the presence information to the presence information intermediary device; E. The presence information intermediary device sends the received presence information to the mobile terminal in the form of a short message or a multimedia message. 16. The method for obtaining presence information according to claim 15, wherein the presence information intermediary device is any combination of the following devices: mobile switching center, service control point, short message center, multimedia message center, application server. 17. The method for obtaining presence information according to claim 15 or 16, characterized in that before step D, the filter condition for receiving the presence information by the mobile terminal is set, and in step D, the presence server sends the presence information according to the filter condition To present the information intermediary device.

Images