WO2007131400A1

WO2007131400A1 - A method and a system for achieving presence services and the presence server

Info

Publication number: WO2007131400A1
Application number: PCT/CN2006/003286
Authority: WO
Inventors: Hongguang Guan
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-05-15
Filing date: 2006-12-05
Publication date: 2007-11-22
Also published as: CN101043394A

Abstract

A method for achieving presence services in the network communication technology field includes: the first presence server receives the subscribing request requesting to subscribe the presence information of the subscribed party which is not in the same domain from the first subscriber in the same domain; if the first presence server inquires that the presence information of the subscribed party requested to be subscribed by the first subscriber is reserved, it notifies the first subscriber of the reserved presence information of the subscribed party which is inquired. A presence server and a system for achieving presence services can decrease the redundant information interaction between the presence servers largely.

Description

Method, system and rendering service for realizing rendering service

This application claims priority to Chinese Patent Application No. 200610060831. 3, which is entitled "A Presentation Server, System and Method for Presenting Services Based on SIP", which was submitted to the Chinese Patent Office on May 15, 2006. The entire contents are incorporated herein by reference.

Technical field

The present invention relates to the field of network communication technologies, and in particular, to a method, a presentation server, and a system for implementing a presence service.

Background technique

Session Initiation Protocol SIP (Sessential Initiation Protocol) is an application layer control protocol for multimedia communication over IP networks. It is used to create, modify, and terminate session sessions attended by one or more participants. These include Internet multimedia conferencing, Internet telephony, distance education, and telemedicine. That is, all interactive two-way or multi-party multimedia communication activities on the Internet are collectively referred to as multimedia sessions. Members participating in the session can communicate by multicast, unicast networking, or a combination of the two. ,

SIP messages are encoded in text mode and fall into two categories: request messages and response messages. The request message is used by the client to activate SIP messages sent to the server according to a specific operation, including INVITE, ACK, OPTIONS, BYE, SUBSCRIBE, CANCEL and REGISTER messages. The response message is used to respond to the request message, indicating the success or failure status of the request. Different types of response messages are distinguished by status codes. For example, a response message with a status code of 200 indicates 0K.

Presence is a method of obtaining presence information (such as user status, communication capability, personal reference, etc.) in real-time according to certain access criteria according to certain access criteria, and presenting it to other users.

At present, with the popularity of the Internet, more and more people like to keep in touch with others through instant messaging, and the number of such people is increasing rapidly. In the field of mobile communications, instant messaging services are also emerging. The rich and perfect value-added service instant messaging services have become a beautiful landscape in the communications business market. Presenting in this instant Communication plays a very important role. Relying on the presence service, the instant messaging service can be based on functions such as "user multiple status settings" (such as the user setting "call", "meeting in progress", etc.), providing "subscription to other people's status information", etc. A variety of rich value-added services, providing efficient and convenient solutions for personal, business users in the office, conference, communications and other fields.

In the prior art, SIP is used to implement the Presence function, and the presentation server structure is as shown in FIG. The presence server includes a presence agent (Proxy Service Agent), a Proxy Server (Proxy Server), and a Controller (Controller), where the Presence Agent is used to accept and process the subscription request, generate and send an advertisement response; and the Proxy Server is used to forward the subscription request. Or the notification response; the Controller is used to control and coordinate the work between the modules, and the Presence Server is controlled whether the Presence Agent is enabled for processing or the Proxy Server is enabled for processing. The presence server receives the subscription request from the subscriber in the domain. If the subscriber that the Controller resolves to obtain the subscription request is the user in the domain, the Presence Agent generates and sends an advertisement response message to the subscriber, and announces the The presence information of the subscriber; if the Subscriber resolves that the subscriber of the subscription request is a non-local user, the Proxy Server forwards the subscription request to the presence server in the domain where the subscriber is located. When the Presence Server receives a NOTIFY from another domain (a message used to notify certain events), the Control led message is forwarded by the Proxy Server.

Presence can support intra-domain and inter-domain. It is relatively simple in the domain. We mainly focus on the inter-domain situation. Please refer to FIG. 2, which is a schematic diagram of a system networking for implementing a presence service. There are two domains in Figure 2, and the other 'J is Domain A and Domain B. In Domain A, there are a presence server (Presence Server) A and users User Al and User A2. In Domain B, there are a presence server (Presence Server) B and a user User B.

If User A and User A2 want to obtain the presence information (presence information) of User B, please refer to FIG. 3, which is a flowchart of a method for implementing a presence service in the prior art: D User Al sends a subscription request SUBSCRIBE message to Presence Server A. Requesting to subscribe to the presentation information of User B in the SUBSCRIBE message;

2) Presence Server A finds that the subscribed user is not a local user and finds that The user under Domain B forwards the SUBSCRIBE message sent by User A1 directly to Presence Server B. If Presence Server B agrees with User A's request, it responds with a response message 200 to User Al.

3) Presence Server B sends an advertisement message NOTIFY to Presence Server A, and contains the presence information of User B in the NOTFIY message.

4) Presence Server A forwards the NOTIFY message to User Al.

5) User A2 sends a SUBSCRIBE message to Presence Server A, and requests subscription of User B's presence information in the SUBSCRIBE message.

⁶ ) Similarly, Presence Server A simply forwards the SUBSCRIBE message to Presence Server B. If Presence Server B agrees with User A2's request, it responds with a response message 200 to User A2.

7) Presence Server B sends the IFY to Presence Server A, and contains the presentation information of User B in the Philip FIY message.

8) Presence Server A forwards the NOTIFY message to User A2.

Presence Server B receives a subscription request (and it agrees) to establish a subscription session with the originator of the subscription request. Since then, because Presence Server A only forwards the subscription request, the originator of the subscription request is still subscriber. Specifically, in this example, User Al sent a subscription request to Presence Server B, and User B also sent a subscription request to Presence Server B. Therefore, Presence Server B will each according to jtb and User Al and User A2. Establish a subscription session service for User B.

Thereafter, if the User B presentation information changes (ie, updates), User B can know the new presence information of User B through some methods (such as sending PUBLISH message M Presence Server B. Further, Presence Server B is based on the two established. User B subscribes to the session service and sends two notification messages NOTIFY carrying User B's new message to Presence Server A. One of the NOTIFYs is forwarded to User Al by Presence Server A, and one is forwarded to the User by Presence Server A. A2. Then, User Al and User A2 can know the new presentation information after User B is updated.

It can be seen from the above information interaction process of implementing the presentation service that as long as one of the domains A The subscriber sends a subscription request for User B. After forwarding through Presence Server A, as long as Presence Server B agrees, a subscription session service is established between Presence Server B and the subscriber. Therefore, if multiple subscribers request to subscribe to the presence information of the same subscriber in the local domain, Presence Server B will establish multiple subscription session services for User B accordingly.

The subscription session service established between the subscribers in the domain where the Presence Server B and the Presence Server A are located must be forwarded through the Presence Server A. Therefore, there is a large number of messages between the Presence Server B and the Presence Server A for each subscription session. transfer. However, in fact, when the subscribers in the multiple subscription session services are the same, the advertisement message (the presence information of the subscriber) that Presence Server B responds in the multiple subscription session services is generally the same, and thus the Presence Server A The forwarded advertisement messages are generally the same. It can be seen that in the existing technical solutions for implementing the presence service, there is a large amount of redundant announcement message transmission between the Presence Server A and the Presence Server B. Further, if the subscriber's presence information changes, and the subscriber's new presence information is to be advertised to multiple subscribers, the instantaneous amount of messages between Presence Server B and Presence Server A will be large.

Summary of the invention

The technical problem solved by the present invention is to provide a method, system and a presence server for implementing a presence service, and reducing information interaction between presentation server redundancy in a presence service system.

The object of the invention is achieved by the following technical solutions:

An embodiment of the present invention provides a method for implementing a presence service, where the method includes: receiving, by a first presence server, a subscription request from a first subscriber in the domain, requesting subscription of subscription information of a subscriber that is not in the domain; The presence server queries to the subscriber presence information stored with the subscription subscribed by the first subscriber; the queried saved subscriber presence information is advertised to the first subscriber.

An embodiment of the present invention further provides a presence server, including a subscription request receiving unit, and a query unit and a presence information obtaining unit, and the subscription request receiving unit is configured to receive, Responding to the subscription request from the subscribers in the domain and parsing whether the subscriber is an out-of-domain user; the query unit is configured to query the subscription request receiving unit to parse the subscriber subscribed by the first subscriber to be a non-local user Whether to save the subscriber's presence information requested by the first subscriber; the presence information acquisition unit is configured to query the query unit

After the work, the saved subscriber presence information is advertised to the first subscriber through the subscription request accepting unit.

Embodiments of the present invention also provide a system for implementing a presence service, including at least two presence servers as described above.

In the technical solution provided by the embodiment of the present invention, when the first presence server receives the subscription request from the first subscriber in the domain 0, and requests to subscribe to the presence information of the subscriber in the local domain; if the first presence server queries The retained subscriber presence information that is subscribed to by the first subscriber is saved, and the queried saved subscriber presence information is advertised to the first subscriber. It can be seen that, in the case that the first presence server has saved the subscriber presence information, even if another user subsequently subscribes to the subscriber's presence information, the first presentation server does not need to be the second. The server establishes a subscription session service for the subscriber. Therefore, with the technical solution provided by the embodiment of the present invention, there is no case where a plurality of subscription session services for the same subscriber are established in the existing presentation service implementation technical solution, and the amount of redundant messages transmitted between the servers is presented. decrease very much.

0 BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic diagram of a specific structure of a presentation server in the prior art; FIG. 2 is a schematic diagram of a system networking for implementing a presence service;

3 is a flow chart of a method for implementing a presence service in the prior art;

4 is a schematic diagram of a specific structure of a presentation server according to the present invention; FIG. 5 is a flow chart of information interaction of a first embodiment of a present invention; FIG. Interaction Flowchart; FIG. 7 is a structural block diagram of a preferred embodiment of a presence server in the present invention.

detailed description

Throughout the specification, the preferred embodiment and examples shown should be considered as examples of the invention. Without restrictions.

Please refer to FIG. 4 , which is a schematic diagram of a specific structure of a server Presence Server according to the present invention. The Presence Server includes the following modules: Presence Agent, Proxy Server, Watcher Agent, and Controller. The Presence Agent is used to accept and process subscription requests, generate and send notification responses, and the Proxy Server is used to forward subscription requests or advertise responses. Obtaining the presence information of the user in the non-local domain, providing the presence information to the Presence Agent, determining whether the presence information of the subscriber in the non-local domain has been saved; the Controller is used to control and coordinate the work between the modules, and the Control Presence Server is enabled. The Presence Agent processes it or processes it with the Proxy Server.

After the Presence Server receives the subscription request from the subscribers in the domain, it performs different processes according to different conditions:

(1) requesting to subscribe to the presence information of the subscribers in the non-local domain, and the Controller resolves the subscribers who obtain the subscription request to be non-local users. If the Watcher Agent queries the presence information of the subscriber, the presence information is sent to the Presence Agent.

The Presence Agent generates and sends an advertisement response message to the subscriber, and announces the presence information of the subscriber.

(2) When the Controller parses the subscriber whose subscription request is the user in the domain, the Presence Agent generates and sends an advertisement response message to the subscriber to announce the presence information of the subscriber.

(3) requesting to subscribe to the presence information of the subscribers in the non-local domain, and the Controller resolves the subscribers who obtain the subscription request to be non-local users. If the Watcher Agent does not query the presence information of the subscriber, the Watcher Agent sends a subscription request to the Presence Server of the domain in which the subscriber is located, requesting subscription of the presence information of the subscriber. The presence information of the subscriber is saved in a storage medium.

When the Watcher Agent sends a subscription request to the Presence Server of the domain in which the subscriber is located, the subscription request is created by the Presence Server in the domain where the subscriber is subscribed, or the subscription request from the subscriber is forwarded.

When the Presence Server receives the notification response message, if the Controller determines that it is ί

-7- In response to the subscription request sent in the domain, the Watcher Agent sends the presence information obtained by parsing the notification response message to the Presence Agent, and the Presence Agent generates and sends the notification response message to the subscriber who issues the subscription request; otherwise, the Proxy Server forwards the notification. Response message.

5 The Presence Server according to the embodiment of the present invention includes a Watcher Agent. According to the foregoing description of the Watcher Agent, the internal structure can be directly inferred. The Watcher Agent includes at least a query unit and a presentation information acquisition unit. The query unit is configured to query whether the subscribed subscription requested by the first subscriber is saved.

^{The first} information is presented by the subscription request receiving unit to notify the first subscriber after the query unit successfully queries the saved subscriber presence information. It should be noted that the saved subscriber information is not limited to being inside the present server, but may also be located externally, such as other storage servers, as long as the server storing the subscriber information can be queried and extracted by the present server. Just fine. Preferably, the watcher agent further includes a service establishing unit, configured to create a new subscription session service between the present presence server and the second presence server after the query unit query is not successful, and The Presence Agent is informed of the subscriber's presence information. In turn, the Presence Agent responds to the subscriber.

It should be noted that the internal structure of the presentation server provided in this embodiment only gives a feasible specific structure division manner, and those skilled in the art should be able to realize that the components can be re-created as needed. Combining or splitting a component, these structural logical adjustments do not affect the overall technical solution of the present invention server. For example, the Presence Agent and the Controller can be combined to form a subscription request accepting unit. The function of the subscription request receiving unit is equivalent to the Presence Agent + Controller; for example, the Watcher Agent and the Proxy 5 Server are combined.

In addition, it should be noted that if all the rendering servers on the network are equipped with a Watcher Agent, the rendering server does not need to do simple forwarding, so it is presented.

'Proxy Server can no longer be set up in the server. Of course, if Proxy Server is retained, it can be better compatible with existing rendering servers (ie no Watcher). The agent server and the existing presence server according to the embodiments of the present invention can implement interworking.

The above is only a specific embodiment structure of the present invention server. After the embodiments of the method for implementing the present invention are introduced, a more general internal block diagram of the present invention server is also given. The relationship between the more general structural block diagram and the specific structure of this embodiment will be pointed out.

A SIP-based presentation service system, as shown in FIG. 1, the system includes: at least one Presence Server, the Presence Server includes at least one user in the domain, and actually, there may be multiple Presence Servers; the at least one Presence Server Receiving and updating the presence information for the subscription of the presence service; the user subscribes to the presence service to the Presence Server; the Presence Server within the domain of the subscriber receives a subscription request from the user's presence service, requesting to subscribe to a subscriber other than the domain Presenting information, if the Presence Server in the domain of the subscriber saves the presence information of the subscriber, the Presence Server directly advertises the presence information of the respondent to the subscriber; otherwise, the Presence Server in the domain of the subscriber is in the domain of the subscriber. Presence Server sends a subscription request, which is in the domain of the subscriber

Presence Server sends an advertisement response to Presence in the domain of the subscriber

Server.

If the Presence Server in the domain where the subscriber is located receives the subscription request from the Presence Server in the domain of the subscriber, or the presence information of the subscriber changes, the Presence Server in the domain where the subscriber is located advertises the presence to the Presence Server in the domain of the subscriber. The subscriber's current presence information, the presence server in the subscriber's domain advertises the presence information to all subscribers subscribing to the information. A subscription request is a Presence Server creation or generation in the subscriber's domain, or a subscription request from a subscriber.

Please refer to FIG. 5 , which is a schematic diagram of an information interaction process of a first embodiment of a SIP-based presentation service method according to the present invention. The first embodiment is still described by taking the networking situation of FIG. 1 as an example: Presence Server A and User Al, User A2 in Domain A, Presence Server B and User B in Domain B; User Al and User A2 To get the presentation information of User B. The information interaction process of the first embodiment of the SIP-based presentation service method provided by the present invention includes the following steps:

1) User Al sends a subscription request SUBSCRIBE message to Presence Server A, requesting to subscribe to the online information of user User B in Doma in B;

2) Presence Server A finds that the subscribed user is not a local user, is

The user in Domain B, then, Presence Server A queries whether the online information of user User B is saved, and is not queried;

3) Presence Server A sends a subscription request to Presence Server B. The SUBSCRIBE message requests to subscribe to the presence information of User B. The SUBSCRIBE message may be Presence Server A re-created according to the received SUBSCRIBE or directly use the received SUBSCRIBE message;

4) Presence Server B uses the IFY notification response to inform Presence Server A of the presence information of User B, and Presence Server A saves the presentation information of User B.

In the existing method for presenting the service, Presence Server B establishes a subscription session service with the originator of the subscription request based on the subscription request, and Presence Server A simply forwards the subscription request of User Al and User A2, so the actual establishment is performed. The two subscription sessions for User B are still between User Al and Presence Server B and User A2 and Presence Server B.

However, the content according to the above embodiment of the present invention can be directly inferred, in Presence

After Server A receives the subscription request from User Al, Presence Server A is equivalent to interrupting the subscription request (instead of simple forwarding in the prior art scheme), and then generates a new subscription request and sends it to Presence Server B. The new subscription request contains the information that the subscriber is User B. Therefore, the subscription session service for User B established according to the new subscription request is between Presence Server A and Presence Server B. In other words, through the execution of steps 3 and 4, a subscription session service for User B is established between Presence Server A and Presence Server B.

5) Presence Server A sends NOTIFY to User Al to inform User B of the online status. According to the concept of subscription session business, it can be directly inferred, based on User Al The subscription request sent by Presence Server A establishes a subscription session service between User A1 and Presence Server A, so when Presence Server A learns the presence information (such as online status) of User B, it will notify it. User Al.

6) User A2 sends a subscription request SUBSCRIBE message to Presence Server 5 A, which is also a request to subscribe to User B's presence information.

7) Presence Server A finds that the subscribed user is not the local user. Presence Server A queries whether the online information of user User B is saved. It can be found that Presence Server B sends NOTIFY directly to User A2 to inform User B of the presence information.

0 8 ) When User B changes the rendering information, it passes some methods (such as sending

PUBLISH message) enables Presence Server B to get the latest presentation information. Presence Server B then learns from the query record that Presence Server A has sent a subscription request to it. Therefore, it sends a NOTIFY message to Presence Server A to inform User B that the presence information has changed, and then Presence Server A goes to User Al5 and User A2 respectively. Send a NOTIFY message to inform User B of the current presence information.

9) In the above embodiment, if the subscriber is in the same domain as the subscriber, the Presence Server processes the SUBSCRIBE message according to the conventional manner, and therefore will not be described again.

Through the above process, it can be seen that Presence Server A saves the user B's presence information from the Presence 0 Server B for the first time, and then subscribes to User B's presence information when other users (such as User A2) subscribe to it. Presence Server A first searches for the presence of User B's presence information. If there is, Presence Server A does not need to send a subscription request to Presence Server B, but directly informs the subscription request of the saved User B. Party (such as User A2). In the existing SIP-based presence service, if multiple users (such as User Al and User A2) subscribe to the information of the same domain user (such as User B), the Presence Server A in the domain must be in the Presence of another domain. Server B sends multiple subscription requests, which in turn causes Presence Server B to reply to Presence Server A with multiple notification responses ( NOTIFY ) to inform User B of the presence information. That is, the first of the present invention is adopted. The technical solution provided by the embodiment, when multiple users request to subscribe to the presence information of the same out-of-domain user, greatly reduces the redundant message traffic between the Presence Server A and the Presence Server B compared to the existing presence service.

Further, since multiple users in domain A subscribe to the same user in domain B (such as User B), Presence Server A only sends a subscription request to domain B, and then only between Presence Server A and Presence Server B. Based on this, a session service for subscribing to User B is established. Therefore, when the subscribed User B presentation information changes, Presence Server B simply informs Presence Server A of the User B presence information update message based on its session service for subscribing to User B.

In the existing presence service, when the same situation occurs, Presence Server A needs to send multiple subscription requests to Presence Server B, and then establish multiple session services for subscription to User B between Presence Server A and Presence Server B. . Further, when User B presents the information change, Presence Server B forwards the User B's presence information update message through Presence Server A accordingly.

It can be seen that, by adopting the technical solution of the embodiment of the present invention, after the information presented by the subscribing user is changed, the traffic of the update information of the presence information between the Presence Server B and the Presence Server A is also greatly reduced, and there is basically no redundant notification. response.

In addition, between the Presence Server A and the Presence Server B, the service needs to be refreshed for each subscription session. The technical solution of the embodiment of the present invention, regardless of how many users in the domain subscribe to the presentation information of the User B, the Presence Server A subscription session service for User B will only be established between A and Presence Server B, so the resulting total refresh traffic will be reduced.

Referring to FIG. 6, the present invention provides a schematic diagram of an information interaction process for implementing a second embodiment of a presence service method. The first embodiment is still described by taking the system of FIG. 1 as an example: Presence Server A and User Al, User A2 in Domain A, Presence Server B and User B in Domain B; User Al and User A2 to obtain User The presentation information of B, and the presentation information that User B wishes to provide to User Al and User A2 is different (this is also the difference from the application environment of the first embodiment). This situation is also common in many existing instant messaging systems, for example, User B wishes to provide a presentation letter to User Al. The information is online, and the presence information that you want to provide to User A2 is not online. With the technical solution provided by the second embodiment of the present invention, in this case, the purpose of reducing information traffic between Presence Servers in different domains can also be achieved. details as follows:

1) User A1 sends a SUBSCRIBE message to Presence Server A and requests to subscribe to User B's online status in the SUBSCRIBE message.

2) Presence Server A finds that the subscribed user is not the local user but the user under Presence Server B. Presence Server A replies to the User Al subscription request.

3) Presence Server A sends a SUBSCRIBE message to Presence Server B. Subscribe to User B's online information. A list is included in the SUBSCRIBE message to indicate which users want to obtain User B's online information, and User Al is added to the list.

4) Presence Server B sends a NOTIFY message to Presence Server A, which contains the online status of User B for User Al.

5) Presence Server A sends a NOTIFY to User Al to inform User B of the online status.

6) User A2 sends a SUBSCRIBE message to Presence Server A and requests to subscribe to User B's online status in the SUBSCRIBE message.

7) Presence Server A finds that the subscribed user is not the local user but the user under Presence Server B. Presence Server A replies to the User A2 subscription request has been accepted.

8) Presence Server A sends a SUBSCRIBE subscription refresh message to Presence Server B. A list is included in the SUBSCRIBE message to indicate which users want to obtain User B's online information, and User A2 is added to the list. The SUBSCRIBE refresh message is based on the session established by SUBSCRIBE in step 3, so it can be called a subscription refresh message, and is not independent of the SUBSCRIBE session established in step 3.

9) Presence Server B sends a NOTIFY message to Presence Server A, which contains the online status of User B for User A2. It can be seen that the essence of steps 8 and 9 is to refresh the existing subscription session service about User B. Presence Server A and Presence Server B are related to User B's subscription session service, which is initially established based on User A1 subscription. Thereafter, User A2 also subscribes to User B's presence information, so the existing subscription subscription service is refreshed. Specifically, the subscriber information list is refreshed, and the User A1 and User A2 are included after the refresh, and the response notification message refreshed by the Presence Server B also includes the User B presentation information for User A2. In this way, even if the information that User B wishes to present to User A1 and User A2 is different, for example, User B is busy to User A1, and is free to User A2. It can be seen that 10 this embodiment not only satisfies the requirement of presenting information diversity, but also achieves only one subscription session service between the Presence Server A and the Presence Server B for the same subscriber, thereby greatly reducing two Represents the amount of allowed information passed between servers.

10) Presence Server A sends a NOTIFY to User A2 to inform User B of the 15-wire status.

11) User B changes the online status. It enables Presence Server B to get a new online status by some means (such as sending a PUBLISH message).

12) Presence Server B sends an IFY message to Presence Server A. In the NOTIFY message, User B online 0 information for users User A1 and User A2 is included. Presence Server A then sends a NOTIFY message to User Al and User A2 to inform User B of the online status.

According to the information interaction process of the embodiment, since a list of subscription requesters is added to the SUBSCRIBE message, the Presence Server A only needs to send the presence information to the Presence Server B when there is another user in the domain A subscribing to the presence information of the User B. This 5 pre-SUBSCRIBE refresh message, and refresh the subscriber list in it to join User A2.

Furthermore, between Presence Server A and Presence Server B, only a session service for subscribing to User B is established, instead of creating a plurality of session services for subscribing to User B as in the existing presence service, so it is presented in User B. Information When a change occurs or is refreshed based on the session service, the message traffic between the Presence Server A and the Presence Server B is greatly reduced.

The first embodiment and the second embodiment of the present invention are implemented by the above-described present invention. It can be concluded that in the present invention, only one subscription session service can be established between two different domain servers with respect to the same subscribed 5 readers. . The specific implementation is summarized as follows:

First, the first presence server receives a subscription request from the first subscriber in the domain, requesting subscription of the presence information of the subscribers that are not in the domain. Then, if the first presence server queries the subscriber presence information saved by the first subscriber to subscribe, the queried retained subscriber presence information is advertised to the first subscriber. If the first presentation server queries that the subscriber presence information is not saved by the first subscriber, there are two preferred implementation methods:

(1) if the first presence server queries that the first subscriber has not saved

'reading the subscriber's presence information, establishing a subscription session service with respect to the subscriber between the first presence server and the second presence server of the domain in which the subscriber is located; 5 (2) if the first A presence server query does not save the subscriber presence information requested by the first subscriber, and there is no subscription for the subscriber between the first presence server and the second presence server of the domain in which the subscriber is located a session service; establishing a subscription session service with respect to the subscriber between the first presence server and a second presence server of the domain in which the subscriber is located.

0: (1) or (2), preferably, the specific process of establishing a subscription session service between the first presence server and the second presence server for the subscriber includes: the first presence server is based on receiving The first subscriber's subscription request creation generates a second subscription request, the second subscription request message includes at least subscriber information; the first presence server sends the second subscription request to the second presence server; The Presentation 5 server receives the subscriber presence information of the second presence server response.

After establishing the subscription session service of the subscriber, the first presence server obtains the subscriber presence information requested by the first subscriber from the established subscription session service and saves the information; The subscriber presents information to the first subscriber. It should be noted that the first presence server will be known to be subscribed to. The presence information is stored inside or outside the present rendering server.

If the implementation described in (2) is adopted, the first presence server queries the subscriber presence information that is not saved by the first subscriber, and the first presence server and the subscriber's domain are located. If there is already a subscription session service for the subscriber between the second presence servers, then the already existing subscription session service for the subscriber is refreshed, and the refreshed subscription session service is The subscriber information involved includes the first subscriber; and, in turn, the first presence server obtains the subscriber presence information requested by the first subscriber from the refreshed subscription session service, and advertises to the first subscriber.

Further, if the presence information of the subsequent subscriber is changed, that is, the second presentation service learns that the subscription information of the subscriber changes, the second presence server is first based on the already existing subscription session service for the subscriber. The presence server advertises the new presence information of the subscriber; then, the first presence server advertises the subscriber's new presence information to the subscriber.

Based on the same inventive concept as the method for realizing the presentation service of the present invention described above, the present invention also provides a structural block diagram of a preferred embodiment of the presentation server, as shown in FIG. The present embodiment presentation server includes a subscription request accepting unit 71, a query unit 72, a presence information acquiring unit 73, and a service establishing unit 74. The internal structure of the presentation server will be further explained below in conjunction with the working principle of the presentation server. The query unit 72 includes at least a first query subunit 721, and preferably a second query subunit 722. Correspondingly, the presentation information obtaining unit 73 includes at least a first presence information obtaining subunit 731, and preferably, a second presentation information acquiring subunit 732.

The subscription request accepting unit 71 is configured to receive, respond to a subscription request from a subscriber within the domain, and to resolve whether the subscriber is an out-of-domain user. The query unit 72 is informed when it resolves that a subscriber subscribed to by a subscriber (referred to as a first subscriber for convenience of the description) is a non-local user.

After entering the query unit 72, there are still two preferred implementations, which are respectively described below:

(1) First, the first query sub-unit 721 queries whether the first subscriber is saved. Subscribed subscribers requesting subscriptions present information. If the first query sub-unit 721 is successful, the first presence information acquisition sub-unit 731 is notified, and the first presence information acquisition sub-unit 731 notifies the queried saved subscriber presence information to the first through the subscription request acceptance unit. a subscriber; if the first query sub-unit 721 is unsuccessful, the service establishment unit 74 is informed. Thus, in this embodiment, it is not necessary to set the second query subunit and the second presence information acquisition subunit.

(2) First, the first query sub-unit 721 queries whether the subscriber presence information requested by the first subscriber is saved. If the first query sub-unit 721 is successful, the first presence information acquisition sub-unit 731 is notified, and the first presence information acquisition sub-unit 731 notifies the queried saved subscriber presence information to the first through the subscription request acceptance unit. a subscriber; if the first query sub-unit 721 is unsuccessful, further querying, by the second query sub-unit 722, whether there is already a presence between the first presence server and the second presence server of the domain in which the subscriber is located Subscriber's subscription session business.

Further, if the second query sub-unit 722 successfully queries, the second presence information obtaining sub-unit 732 refreshes the subscription session service already existing between the present presence server and the second presence server with respect to the subscriber. The first subscriber is not included in the subscriber information involved in the subscribed session service of the subscriber before the refresh, for example, only User Al in the list of subscriber information before the refresh, and the list of subscriber information after the refresh is included. Includes User A1 and User A2. Further, the second presence information acquisition sub-unit 732 saves the subscriber presence information learned from the subscription, and notifies the first subscriber through the subscription request accepting unit; if the second query sub-unit 722 also fails the query, the service is notified A unit 74 is established.

Then, the service establishing unit 74 establishes a subscription session service with respect to the subscriber between the present presence server and the second presence server, and notifies the subscriber information learned based on the service through the subscription request processing unit to the First subscriber. Preferably, the service establishing unit specifically includes: a second subscription request creating unit, configured to create a second subscription request according to the received subscription request of the first subscriber, where the second subscription request includes at least the subscriber information a second subscription request sending unit, configured to send the second subscription request to the second presence server; and a second subscription request response processing unit, configured to: Receiving subscriber presence information of the second presence server response. Further, preferably, the presentation service further includes an update presence information processing unit, configured to receive the new presence information of the subscriber notified from the second presence server, and notify the corresponding subscriber through the subscription request processing unit. Even if the unit does not exist, the presence server implementation of the presence service provided by the embodiment of the present invention has greatly reduced the allowable message traffic between the presence server A and the presence server B.

If at least two of the aforementioned rendering servers are included, an implementation rendering service system can be constructed. Since the presentation server inside the system has been described in detail before, it will not be described here.

The block diagram of the embodiment of the present invention presented above is shown in the figure.

A specific presentation server structure of the present invention shown in FIG. 4 is implemented. For example, the subscription request accepting unit 71 in this embodiment is split into two parts, which are respectively implemented by the Presence Agent and the Cont ro l l er. Specifically, the Presence Agent receives and responds to the subscription request from the subscriber in the domain; and whether the subscriber in the subscription request received by the Presence Ag en is resolved by the Cont ro l ler to the out-of-domain user. The query unit 72, the presence information acquisition unit 73, and the service establishment unit 74 can all be implemented by the Wa tcher Agent. As can be seen, Figure 7 is a general block diagram of a preferred embodiment of the present invention, and Figure 6 can be considered a specific implementation of the presentation server architecture of Figure 7. Those skilled in the art will appreciate that the names of the constituent units, regardless of how they are combined, split, or replaced, are within the spirit of the invention.

The various embodiments described above are illustrative of the principles of the invention. It is to be understood that the specific embodiments of the present invention are not limited thereto. Various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

Rights request

A method for implementing a presence service, the method comprising: the first presence server receiving a subscription request from a first subscriber in the domain, requesting to subscribe to presence information of a subscriber other than the local domain;

The first presence server queries the subscriber presence information saved with the subscription subscribed by the first subscriber;

The queried saved subscriber presence information is advertised to the first subscriber.

The method according to claim 1, wherein the method further comprises: the first presence server querying the subscribed presence information that is not saved by the first subscriber to subscribe to;

Establishing a subscription session service with respect to the subscriber between the first presence server and a second presence server of the domain in which the subscriber is located;

The first presence server learns, from the established subscription session service, the subscriber's subscription information requested by the first subscriber and saves the information;

The first presence server advertises the learned subscriber presence information to the first subscriber.

The method according to claim 2, wherein the first presence server saves the learned subscriber presence information inside or outside the present presentation server.

The method according to claim 2, wherein before the establishing the subscription session service between the first presence server and the second presence server, the method further comprises:

Determining that there is no subscription session service for the subscriber between the first presence server and the second presence server of the domain in which the subscriber is located.

The method according to claim 2, wherein the specific process of establishing a subscription session service between the first presence server and the second presence server is:

The first presence server creates a second subscription request based on the received subscription request of the first subscriber, the second subscription request message includes at least subscriber information; the first presence server sends the second subscription request to the first Second presentation server; The presence server receives the subscriber presence information of the second presence server response.

The method according to claim 1, wherein the method further comprises: if the first presence server queries the subscriber presence information that is not saved by the first subscriber, and the first There is already a subscription session service for the subscriber between the presence server and the second presence server of the domain in which the subscriber is located;

And refreshing the existing subscription session service about the subscriber, where the updated subscription information involved in the subscription session service includes a first subscriber;

The first presence server learns the subscriber presence information requested by the first subscriber from the refreshed subscription session service, and notifies the first subscriber.

The method according to any one of claims 1 to 6, wherein the method further comprises:

The second presence service learns that the presented information of the subscriber is changed;

The second presence server announces the new presence information of the subscriber to the first presence server based on the already existing subscription session service for the subscriber;

The first presence server advertises the subscriber's new presence information to the subscriber.

8. A presentation server, comprising a subscription request receiving unit, further characterized by: a query unit and a presence information acquisition unit, wherein

a subscription request receiving unit for receiving, responding to a subscription request from a subscriber in the domain, and parsing whether the subscriber is an out-of-domain user;

a query unit, configured to: when the subscription request receiving unit parses out that the subscriber requested by the first subscriber is a non-local user, query whether the subscriber presence information subscribed by the first subscriber is saved;

And a presentation information obtaining unit, configured to, after the query unit successfully queries, the advertised retained subscriber presence information is advertised to the first subscriber by the subscription request receiving unit.

The presence server according to claim 8, wherein the query unit comprises a first query sub-unit for querying whether the subscriber presence information requested by the first subscriber is saved.

10. The presence server according to claim 9, wherein the query The unit further includes a second query subunit for querying whether there is already a relationship between the first presence server and the second presence server of the domain in which the subscriber is located if the first query subunit query is unsuccessful The subscriber's subscription session service.

The presence server according to any one of claims 8 to 10, characterized in that the method further comprises:

a service establishing unit, configured to: after the query unit query is unsuccessful, create a new subscription session service between the present presence server and the second presence server, and pass the subscriber information learned based on the service The subscription request processing unit advertises to the first subscriber.

The service establishment unit according to claim 11, wherein the service establishing unit specifically includes:

And a second subscription request creating unit, configured to create a second subscription request based on the received subscription request of the first subscriber, where the second subscription request includes at least a subscriber credit.

a second subscription request sending unit, configured to send the second subscription request to the second presentation server;

The second subscription request response processing unit is configured to receive the subscriber presence information of the second presence server response.

The presentation server according to claim 10, wherein the presenting the information acquisition unit comprises:

And a first presentation information obtaining subunit, configured to notify the first subscriber by the subscribed request accepting unit by using the subscribed request receiving unit when the first query subunit query succeeds. a second presentation information acquisition subunit, configured to refresh the existing presence between the present server and the second presentation server if the first query subunit query fails and the second query subunit query succeeds Subscribing to the subscribed session service of the subscriber; and retaining the subscriber presence information learned therefrom and advertising to the first subscriber through the subscription request accepting unit.

,

14. A presentation server according to claim 8 or 9 or 10 or 13 wherein Also includes:

a service establishing unit, configured to: after the query unit query is unsuccessful, create a new subscription session service between the present presence server and the second presence server, and pass the subscriber information learned based on the service a subscription request processing unit notifying 5 the first subscriber; and

The update presentation information processing unit is configured to receive the new presence information of the subscribers notified from the second presence server and to notify the corresponding subscribers by the subscription request processing unit.

The presence server according to claim 8 or 9 or 10 or 13, wherein the subscription request receiving unit specifically includes:

Presenting a proxy Presence Agent for receiving and responding to a subscription request from a subscriber within the domain;

The controller Control ler is used to analyze whether the subscriber is an out-of-domain user in the subscription request received by the Presence Agent.

The presentation server according to claim 15, wherein the query unit and the presence information acquisition unit are disposed inside the same module.

17. A system for implementing a presence service, comprising at least two presentation servers as claimed in claim 8 or 9 or 10 or 13. 0

5