JP2007041849A - Presence server and presence information management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cause a presence server to automatically register user presence information. <P>SOLUTION: From an SIP server 1001 that has received a message for establishing or disconnecting a session, a presence server 1002 receives a request method, a destination address (To header) and a sender address (From header), all of which are included in the message. Also, the presence server 1002 refers to a presence determination table in which presence information is previously stored in association with the request method, the destination address and the sender address; the presence server 1002 obtains the presence information associated with each piece of information received. The presence server 1002 stores the received destination address or sender address and the presence information in a presence information table and reports them to a predetermined referrer (e.g., terminal 1003b), the presence information table storing the address of the referred (e.g., terminal 1003a) of the presence information and the presence information of the referred in such a manner as to associate them with each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a presence server and a presence information management system, and in particular, in a presence information management system that manages the status of a user or a terminal, a presence server that acquires and registers the status of the user or the terminal instead of the user or the terminal. The present invention relates to a presence information management system.

  “Presence” indicates the presence or state of a person or thing, and “Presence service” notifies the presence or state of a person or thing (for example, an employee is “present” or “in a meeting”). It is a service. The concept of presence has been studied mainly by the IETF (Internet Engineering Task Force) impp (Instant Messaging and Presentation Protocol) working group (see, for example, Non-Patent Document 1), and SIP (Session Initiation Protocol). A method of transmitting and receiving presence information used has been proposed (see, for example, Non-Patent Document 2).

  FIG. 13 shows an example of the operation of the presence service. A system for presence service includes, for example, a client 6001 who wants to receive presence information notification service, a SIP server 6002 that executes communication procedures for establishing / disconnecting a session between applications, management of presence information, It includes a presence server 6003 that performs notification and a client (referenced person) client 6004 to which presence information is referred.

  In the operation of the presence service, the referrer 6001 transmits a “SUBSCRIBE” (notification reservation) message to the presence server 6003 in order to reserve the information notification of the referee 6004 (F601). Here, since the SIP server 6002 relays the SIP message, the message is once transmitted to the presence server 6003 via the SIP server 6002 (F602). The presence server 6003 returns “200 OK” as a response to the reception confirmation via the SIP server 6002 (F603, F604). In addition, the presence server 6003 transmits the presence information of the current reference person 6004 to the reference person 6001 via the SIP server 6002 by a “NOTIFY” message (F605, F606). In response to this, the referrer 6001 returns a reception confirmation response “200 OK” via the SIP server 6002 (F607, F608). The referrer and the referee are registered in the subscription table.

  When the notification reservation (F601, 602) is performed, the presence server 6003 notifies the reference person 6001 of presence information when the presence of the reference person 6004 is changed. Specifically, when the referenced person 6004 updates the presence information by operating an application or the like (F609), the presence server 6003 detects the presence information update of the referenced person 6004 and passes through the SIP server 6002. Then, the presence information is notified to the reference person 6001 by a “NOTIFY” message (F610, F611). In response to this, the referrer 6001 returns a reception confirmation response “200 OK” via the SIP server 6002 (F612, F613). The above is an operation example of the presence service.

On the other hand, in the implementation, the concept of presence is introduced in so-called IM (Instant Message), and is used as a mechanism for notifying a message to a transmission destination when a partner to send a message comes online. There are also known devices that can register presence information such as “on the phone” and “away” from the user interface of the IM client.
RFC 2778, published by IETF, February 2000 RFC 3265, published by IETF, June 2002

  In the presence service according to the prior art, it is necessary for the user to operate the client application and sequentially register the user's own state as presence information, which may be troublesome. For example, when making (or receiving) a call, it is necessary to register a presence such as during a call by operating a client application in advance. In addition, since the operation is cumbersome, there is a problem that if the user neglects the presence changing operation, the presence information itself cannot be grasped accurately, and the presence service itself cannot be realized in real time.

  In view of the above, it is an object of the present invention to allow a presence server to automatically register user presence information related to the use of an IP phone or various application servers. Another object of the present invention is to reduce the operation burden on the user. Another object of the present invention is to enable accurate presence information acquisition.

  An object of the present invention is to allow a presence server to automatically register an appropriate presence based on session information of a user client and an application server and without a presence setting operation by the user simply by using a network application. It is another object of the present invention to accurately grasp presence without omission of registration by a user.

  In order to achieve the above object, in the present invention, for example, a presence server collects session information (for example, SIP protocol) between a user client and an application server flowing through the network or a client of a connection partner, and collected session information. Are provided with a function for matching the presence status for each combination of item values and a function for setting one or a plurality of presences for one matching pattern.

  The above session information collection function refers to all information (for example, packets in an IP network) that flows through the network like network monitoring software, and only collects session information related to presence server subscribers. It can be carried out. Alternatively, in a SIP network, session management, such as session establishment / disconnection, is performed by the SIP server. Therefore, the SIP server may notify the presence server of session information upon session establishment / disconnection.

  The above-mentioned matching between session information and presence defines in advance the relationship between the contents of a specific information item extracted from a session setting packet including session information (for example, an INVITE message for a SIP message) and presence information to be registered. The presence server includes a presence determination table having a plurality of entries. In addition, when the presence server receives a session setting request packet from the client to the specific application server, the presence server refers to the presence determination table to search for presence information corresponding to information included in the received packet, and stores the presence information in the presence information table. sign up.

  Even with the same matching pattern, the function that can set one or a plurality of presences for the above one matching pattern and the granularity determination table that associates the referenced person, the referee, the presence item, and the granularity preset by the referenced person. It is possible to specify the granularity of presence information to be notified for each referrer. For example, it is possible to notify the close person of more detailed information, and to the other person, notify the rough information. For example, a close person (or a terminal set as granularity A) is notified of the presence of “participating in a chat room with a photo theme”, and a person who is not (or a terminal set as granularity B) is notified. The presence of “chatting” can be notified.

For example, the present invention provides at least two communication applications that establish a session, a presence management device that manages the status of any one of the applications, a device that operates the communication application, and a communication that connects the presence management device. In a network system with a line,
The presence management device includes:
A table for mapping session setting information for establishing a session of the communication application from the network, and a combination of each element value included in the acquired session setting information and presence information indicating the state of the communication application; And a means for searching the mapping table upon detection of a change in session state based on session setting information of the communication application, and a means for registering the search result as presence information.

According to the first solution of the present invention,
A session management server that manages a session between client terminals or between a client terminal and an application server, manages presence information indicating the status of the client terminal and application server, and notifies the presence information to a predetermined client terminal and application server A presence server in a communication system comprising a presence server for
A request method or a session name, a destination identification information, and a transmission source identification information representing the purpose of a request in a message for establishing or disconnecting a session transmitted / received between the client terminals or between the client terminal and the application server; A presence determination table in which presence information indicating the state of the terminal or server is stored in advance, corresponding to session information including:
A presence information table in which identification information of the client terminal or the application server and presence information of the client terminal or the application server are stored correspondingly;
A processing unit for identifying presence information based on predetermined information from the session management server and registering the presence information in the presence information table;
The processor is
Receiving a notification request including identification information of the client terminal or the application server of the referred person to whom presence information is referred from the client terminal or the application server of the reference person;
From the session management server that has received the message for establishing or disconnecting the session, the request method or the session name included in the message, the destination identification information, and the session information including the transmission source identification information are received,
Based on the received request method or session information including the session name, transmission destination identification information and transmission source identification information, refer to the presence determination table to obtain corresponding presence information;
Corresponding received destination identification information or source identification information and the acquired presence information are stored in the presence information table,
The presence server for notifying the presence information to the client terminal or the application server of the referrer who has received the notification request including the transmission destination identification information or the transmission source identification information is provided.

According to the second solution of the present invention,
A session management server for managing a session between client terminals or between a client terminal and an application server;
A presence server for managing presence information indicating the state of the client terminal and the application server, and notifying the presence information to a predetermined client terminal and application server,
The presence server
A request method or a session name, a destination identification information, and a transmission source identification information representing the purpose of a request in a message for establishing or disconnecting a session transmitted / received between the client terminals or between the client terminal and the application server; Corresponding to the session information including the presence determination table in which presence information indicating the state of the client terminal or the application server is stored in advance,
A presence information table in which identification information of the client terminal or the application server and presence information of the terminal or the server are stored correspondingly;
A processing unit for identifying presence information based on predetermined information from the session management server and registering the presence information in the presence information table;
The session management server receives a message for establishing or disconnecting a session, and transmits session information including a request method or a session name, transmission destination identification information, and transmission source identification information included in the message to the presence server. And
The presence server
Receiving a notification request including identification information of the client terminal or the application server of the referred person to whom presence information is referred from the client terminal or the application server of the reference person;
Receiving session information including a request method or a session name, destination identification information, and transmission source identification information included in the message from the session management server that has received the message for establishing or disconnecting a session;
Based on the received request method or session information including the session name, transmission destination identification information and transmission source identification information, refer to the presence determination table to obtain corresponding presence information;
Corresponding received destination identification information or source identification information and the acquired presence information are stored in the presence information table,
There is provided a session information management system for notifying the presence information to the client terminal or the application server of the referrer who has received the notification request including the transmission destination identification information or the transmission source identification information.

  According to the present invention, the presence server can automatically register the user's presence information related to the use of the IP phone and various application servers. Further, according to the present invention, it is possible to reduce the operation burden on the user. Further, according to the present invention, accurate presence information can be acquired.

  According to the present invention, the presence server can automatically register an appropriate presence from the session information of the user client and the application server without any user operation only by using the network application by the user. Further, according to the present invention, there is an effect that the presence can be accurately grasped because there is no registration omission by the user.

Embodiments of the present invention will be described below with reference to the drawings.
(Hardware configuration)
FIG. 1 shows an example of a communication network system to which the SIP server (session management server) and presence server (presence information management system) of the present embodiment are applied. The communication network system provides information services to a plurality of client terminals 1003 (1003a, 1003b,...) Connected to a network 1006, a SIP server 1001 having a session management function, a presence server 1002, and a client terminal 1003. One or a plurality of application servers 1004 are provided.

  As the application server 1004, for example, a movie distribution server 1004 a that distributes movies to clients, a chat server 1004 b for chatting between a plurality of clients, network game servers 1004 d to f that can participate together with friends over a network, a plurality And a TV conference server 1004c that supports a TV conference between other clients. In addition to these, an appropriate application server may be included, or some of the above may be included. Here, the character string shown in parentheses accompanying each device in FIG. 1 indicates an address (SIP-URI) used in the SIP protocol. Connection (session setting) between each client terminal 1003 and the application server 1004 is performed via the SIP server 1001.

  The referee and the referrer of the presence information may be a client terminal or an application server depending on the service. For example, if you want to know the status of the communication partner with whom you want to communicate, the partner client terminal is the referenced person, and in an information distribution service that delivers parking space availability in real time, the application server Become. Although the SIP server and the presence server are described separately here, an integrated configuration may be used.

  FIG. 2 is a block diagram of the presence server 1002. The presence server 1002 includes a network interface 2001 for connecting to the network 1006, a processor (CPU) 2002, and a memory 2006. Furthermore, a storage device 2007 (for example, a large-capacity storage device such as a large-capacity memory or a hard disk) that stores other data files may be included. In this embodiment, the capacity is large, but this capacity is not limited. The memory 2003 stores various programs 2003 executed by the processor 2002, a presence determination table 2004, a granularity determination table 2005, a presence information table 2009, and a subscription table 2010. The configuration of each table will be described in detail later.

  The program 2003 of the memory 2006 includes, for example, a session information acquisition processing routine, a presence matching processing routine, a presence information registration processing routine, a presence information notification routine, a subscription management routine, a SIP protocol processing as programs related to the present embodiment. A routine is provided. The processing of each routine will be described later.

  FIG. 3 shows a block diagram of the SIP server 1001. The SIP server 1001 includes a network interface 3001 for connecting to the network 1006, a processor (CPU) 3002, and a memory 3004 that stores various programs 3003 executed by the processor 3002. Furthermore, a large-capacity storage device 3005 (for example, a large-capacity storage device such as a large-capacity memory or a hard disk) that stores other data files may be provided. In this embodiment, the capacity is large, but this capacity is not limited. In the program 3003, a session information notification processing routine and a SIP protocol processing routine are prepared as programs related to the present embodiment. The processing of each routine will be described later.

  One of the features of the present embodiment is that when the connection request session setting packet (INVITE message) is received and the session is established, the SIP server 1001 notifies the presence server 1002 of the information of the connection request session setting packet. The presence server 1002 searches the presence determination table 2004 in the apparatus using the information of the connection request packet as a key, and automatically registers presence information in the presence information table 2009 according to the state of the user session. It is in. That is, even if the client 1003 does not intentionally update presence, the presence server 1002 can automatically register presence.

  Another feature of the present embodiment is that when the disconnection request session setting packet (BYE message) is received and the session is disconnected, the SIP server 1001 uses the presence information of the connection request session setting packet as the presence information. The server 1002 is notified, and the presence server 1002 searches the presence determination table 2004 in the apparatus by using the information of the disconnection request packet as a key, so that presence information corresponding to the state of the user session is stored in the presence information table 2009. It is to register automatically.

(data format)
FIG. 4 is a diagram illustrating an example of an INVITE message that is one of connection request session setting packets. The SIP message including the INVITE message includes a start line 8001 indicating the type of SIP message (Request-Method, here INVITE) and a destination (Request-URI), and a transmission source (From, transmission source identification information, transmission source address). , A header field 8002 including information such as a destination (To or transmission destination identification information, transmission destination address), route information (Via), and a body 8004 storing other information. A blank line 8003 is also included. The INVITE message is a message that is transmitted and received when setting a session, for example. SDP (Session Description Protocol) is applied to the body for the description of the SIP session. The SDP includes information about the session such as the session name (s), connection information (c), and media type (m).

  FIG. 5 shows an example of a session information notification packet (or message) that the SIP server 1001 notifies the presence server 1002. The session information notification packet includes a start line 9001, a header field 9002, and a body 9004. A blank line 9003 is also included. In this embodiment, a REGISTER message is used to notify the body 9004 of the presence server 1002 including, for example, the connection request session setting packet (INVITE message) 8005 described above. In this embodiment, notification by SIP message (REGISTER message) is given as an example. However, for the purpose of notification of session information, if the session information can be notified, an original format, procedure, etc. that are not standardized are used. May be.

  FIG. 6 shows an example of a subscription table 2010 provided in the presence server 1002. The subscription table 2010 includes identification information 11002 of a referrer (a user who wants to receive a notification service) who has made a notification reservation (FIG. 6: F601, 602) and an identification of a referee (a user whose presence information is referred to). The relationship with the information 11001 is stored in advance in association with it. For example, the referred person and the reference person are registered based on the information of the SUBSCRIBE method. For example, the referred person is the From message of the Subscribe message, and the reference person is the To or the Request URI of the Subscribe message. For example, SIP-URI (see FIG. 1) can be used as the identification information. For example, upon completion of a series of reservation notification procedures (F601 to 608) as shown in FIG. 13, the subscription management routine in the program 2003 of the presence server 1002 receives the notification reservation (F601, 602) and the reference. The identification information of the referrer is registered in the subscription table 2010. For example, the presence server 1002 registers the identification information of the reference person and the identification information of the reference person included in the SUBSCRIBE message in the subscription table 2010. In addition to these, the subscription table 2010 can include information on the valid time 11003 of the reservation notification. However, since this is information for satisfying, for example, the SIP specification, description thereof is omitted here.

  When the presence information is updated (corresponding to F609 in FIG. 13 and automatically updated in the present embodiment), for example, the presence information notification routine in the program 2003 of the presence server 1002 identifies a user whose presence information has been updated. The reference person 11001 of the subscription table 2010 is searched for the key, the reference person 11002 to be notified of the presence information by the corresponding reference person 11002 is specified, and the updated reference person's presence information is given to the reference person 11002. Notification (corresponding to F610 and F611 in FIG. 13).

  FIG. 7 shows an example of the presence determination table 2004 provided in the presence server 1002. The presence determination table 2004 has a plurality of entries in which associations between the contents (session information) 4001 of the SIP message issued by the client terminal and the application server and the presence 4002 are defined in advance. The content 4001 of the SIP message includes a plurality of information items necessary for specifying presence, for example, a request method (request identifier) 4005 indicating the type of the SIP message, a request URI 4006, a transmission destination address (To) 4007, a transmission source An address (FROM) 4008 and a session name (S) 4009 are included. Other information 4010 may be included, or an appropriate item among the above-described information items may be included. The presence 4002 includes presence information 4003 (4003a, 4003b) for each granularity and a presence ID 4004.

  The presence ID is a predetermined identifier that makes the presence item unique. In the present embodiment, for example, presence ID “003” indicates presence indicating the usage status of the user's video conference system, and presence ID “005” indicates presence indicating the usage status of the network game.

  Note that “*” in the presence determination table 2004 shown in FIG. 7 indicates a wild card. In the example of the entry 4011, when the request method 4005 is “INVITE”, the request URI 4006 and the destination address 4007 are “conf@abc.com”, and the session name 4009 is “conf”, Regardless of the source address 4008, “TV conference” is registered for both granularities 1 and 2 as presence information whose presence ID is 003 in the presence information table 2009. This is the case, for example, when a connection request is made from the client 1003 to the TV conference server 1004c. On the other hand, the example of the entry 4012 corresponds to a case where a connection request is made from the TV conference server 1004c to the client 1003 when the conference is convened.

  In the example of the entry 4016, if the request method is “INVITE” and the session name 4009 is “voice”, “calling” is registered in the presence information table 2009 regardless of other items. This corresponds to a case where direct communication is performed between terminals without using a server, such as an IP phone. However, the IP telephone session name is assigned in advance, for example, “voice”.

  Entries 4013 and 4014 are examples in which presence information differs for each granularity. The granularity indicates the resolution of actualization of presence information. In granularity 1, the presence of the referenced user is, for example, “in online game”, but in granularity 2, for example, “participating in online game A” or the like, and more specific information can be notified.

  The entry 4015 is an example of matching priority. The presence determination table can be searched and determined from, for example, the upper row (upper row in the figure) of the table, and the higher the priority is, the higher the priority is. The entries 4013 to 4015 will be specifically described as an example. When a certain client connects to the game server “game_b@abc.com”, an entry 4014 whose destination (To) is “game_b@abc.com” is a search result. It becomes. On the other hand, when the client connects to the game server “game_z@abc.com”, there is no entry whose destination (To) corresponds to “game_z@abc.com”, and the wild card entry 4015 is the search result. By using the priority in this way, a default presence can be registered in the case of non-applicability (in this example, a game server that is not registered in the presence determination table).

  FIG. 8 shows an example of the presence information table 2009 provided in the presence server 1002. The presence information table 2009 is a table in which presence information of the presence owner 10001 is registered for each presence ID corresponding to the identification information 10001 of the presence owner (referenced person). For example, SIP-URI can be used as the identification information of the presence owner. The presence information includes, for example, presence information 10002 with granularity 1 and presence information 10003 with granularity 2 for each presence ID.

FIG. 9 shows an example of the configuration of the granularity determination table provided in the presence server.
In the granularity determination table 2005, for example, the identification information of the referred person, the identification information of the reference person, and the granularity for each presence ID are stored in association with each other. For example, it is stored in advance how much granularity (in this example, either granularity 1 or granularity 2) the referee provides the presence information to the reference. For example, the granularity of information that the referenced person makes public for each presence ID to the referring person can be set by registering the granularity in advance in the granularity determination table 2005 by the referenced person. In the example illustrated in FIG. 9, the referred person (user_a@abc.com) notifies the reference person (user_b@abc.com) of the presence information of granularity 1 for the presence ID “003”, and the presence ID Also for “005”, presence information of granularity 1 is notified. On the other hand, the referee (user_a@abc.com) notifies the reference information (user_c@abc.com) of presence information of granularity 1 for the presence ID “003” and the presence ID “005”. The presence information of granularity 2 is notified. The particle size is not limited to two stages of particle size 1 and particle size 2, and may be an appropriate number.

  When the referred person connects a session with the game server (game_a@abc.com) (for example, presence ID 005), in the example of FIG. 9, the referenced person (user_a@abc.com) is referred to as the reference person (user_b @ abc). .Com) is notified of presence ID “005” with “granularity 1”, while reference user (user_c@abc.com) is notified of presence ID “005” with “granularity 2”. . Therefore, the presence of “in online game” is notified to the reference person (user_b@abc.com), and the presence of “participating in online game A” is notified to the reference person (user_c@abc.com).

  FIG. 10 shows an example of the operation procedure of the present embodiment. In this example, SIP is used as the session connection protocol. In SIP, an INVITE message is used to establish a session. Coordination between terminals is performed in the procedure from F701 to F708, and a session is established according to the result. Note that F701 to F708 can be the same procedure as a predetermined procedure defined by a protocol, for example. In the case of audio and video, audio data and video data are transmitted and received by RTP (Real-time Transport Protocol, RFC1889).

  Upon establishment of a session by transmitting an FACK of F708, the SIP server 1001 (for example, a session information processing routine) sends a session information notification packet 9007 including session information to the presence server 1002 (including information on the INVITE packet 8005 of F701). Are communicated (F709). The presence server 1002 searches the presence determination table 2004 using the session information received from the SIP server 1001 as a key, and registers presence information.

FIG. 11 is a flowchart of the presence information registration process.
First, when the presence server 1002 (for example, the CPU 2002, and so on) receives the session information notification packet 9007 from the SIP server 1001 (S101), for example, the session information acquisition processing routine starts from the body portion 9004 of the session information notification packet 9007. Information corresponding to the items 4005 to 4010 in the presence determination table 2004 is extracted (S103). In the example of FIG. 5, first, the session information acquisition processing routine starts with a request method (Request-Method; INVITE) and a request URI (Request-URI; sip: game_a@abc.com) from the body 9004 of the session information notification packet 9007. ), Destination address 9005 (To; game_a <sip: game_a@abc.com>), source address 9006 (From; user_a <sip: user_a@abc.com>), and session name (s; Game) And extract.

  Next, the presence matching processing routine refers to the presence determination table 2004 and searches for an entry corresponding to each piece of extracted information. In the example of the packet in FIG. Also, the presence information 4002 of the corresponding entry (for example, presence information 4003a and b for each granularity, presence ID 4004) is acquired (S105). In the packet example of FIG. 5, “online game” is acquired from the entry 4013 as presence information of granularity 1, “participating in online game A” as presence information of granularity 2, and “005” is acquired as a presence ID.

  Next, the presence server registers presence information in the presence information table 2009 (S107). For example, first, the presence information registration processing routine refers to the presence owner 10001 in the presence information table 2009 and establishes the connection source of the established session (FROM header 9006 in the session information notification packet 9007) or the connection destination (session information 9007). An entry matching the TO header 9005) is searched. In the example of the packet in FIG. 5, the From header is user_a @ abc. com, entry 10004 corresponds.

  The presence information registration processing routine registers the acquired presence information 4003 in the presence ID field that matches the presence ID 4004 acquired by the presence matching processing routine for the corresponding entry. For example, the presence information “online game” of the acquired granularity 1 is registered in the granularity 1 of the presence ID = 005 of the corresponding entry 10004, and the acquired presence information of the granularity 2 is registered in the granularity 2 of the presence ID = 005. Register “participating in online game A”. FIG. 8 shows the state of the table after registration. Further, presence information may be registered in an entry in which the To header and the presence owner 10001 match in the same manner as described above, or presence information may be registered for each of the From header and the To header.

  In this way, when the presence server 1002 receives the session information notification packet 9007 from the SIP server 1001, the presence information table 2009 is automatically updated, and the updated information is provided to the reference by the following processing.

  The presence server 1002 detects the start or end of an application (service) as an update of presence information, and notifies presence information to a reference person (for example, user_b, user_c) (F711 to F718). user_b and user_c can be registered in advance in the subscription table 2010 by transmitting SUBSCRIBE to user_a in advance.

FIG. 12 is a flowchart of the presence information notification process.
First, in response to detection of presence information update (S201), the presence information notification routine of the presence server 1002 acquires presence information about the user from the presence information table 2009 (S203). For example, in the presence information notification routine, the presence owner identification information 10001 (for example, user_a@abc.com) and the presence ID (for example, user_a@abc.com) of the presence information table 2009 are updated. , 005) and presence information of granularity 1 and granularity 2 (for example, during online game or participating in online game A).

  Next, the presence information notification routine searches the subscription table 2010 and acquires a presence notification target (a reference person corresponding to the referred person whose presence information has been updated) (S205). For example, the presence information notification routine searches the reference table column of the subscription table 2010 using the acquired presence owner identification information as a key, and acquires a corresponding reference (for example, user_b@abc.com). .

  Next, the presence information notification routine searches the granularity determination table 2005 using the referred person (or the acquired presence owner identification information), the reference person, and the acquired presence ID as keys, and the corresponding granularity (for example, In the example of FIG. 9, the granularity 1) is determined (S207). The presence information notification routine transmits the acquired granularity presence information (for example, during an online game) from the already acquired presence information to a reference person (for example, the client terminal 1003b) by attaching it to the “NOTIFY” message (for example, the client terminal 1003b). S209, corresponding to FIGS. 10F711 and F712).

  On the other hand, the client terminal 1003b transmits 200 OK to the presence server 1002 via the SIP server 1001. If the client terminal 1003c is a referrer, a NOTIFY message is transmitted to the client 1003c as described above (F715 to F718).

  In this example, the session establishment trigger is F708, but reception of “200 OK” of F705 or “INVITE” of F701 may be triggered by the service operation method or the like. As a modification of the present invention, instead of the SIP server 1001 notifying the presence server 1002 of the session information, the presence server 1002 monitors the network packet and acquires only the subscriber session information by filtering. You may do it.

  The present invention can be used, for example, in a communication system that notifies or manages the status of a user or a terminal.

The figure which shows an example of a structure of the communication network system to which this invention is applied. 1 is a block diagram of a presence server according to the present invention. The block diagram of the SIP server by this invention. An example of the message format of a connection request session setting packet. An example of the message format of a session information notification packet. An example of the structure of the subscription table with which a presence server is provided. An example of the structure of the presence determination table with which a presence server is provided. An example of the structure of the presence information table with which a presence server is provided. An example of the structure of the granularity determination table with which a presence server is provided. An example of the presence registration sequence by this invention. The flowchart of a presence information registration process. The flowchart of a process of presence information notification. The figure which shows the basic operation | movement sequence of presence service.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1001 ... SIP server 1002 ... Presence server 1003 ... Client 1004 ... Application server 1006 ... Network 2004 ... Presence judgment table 2005 ... Granularity judgment table 2009 ... Presence information table 2010 ... Subscription tables 2001, 3001 ... Network interface 2002, 3002 ... CPU
2003, 3003 ... Program 2006, 3004 ... Memory 2007, 3005 ... Mass storage device

Claims (7)

A session management server that manages a session between client terminals or between a client terminal and an application server, manages presence information indicating the status of the client terminal and application server, and notifies the presence information to a predetermined client terminal and application server A presence server in a communication system comprising a presence server for
A request method or a session name, a destination identification information, and a transmission source identification information representing the purpose of a request in a message for establishing or disconnecting a session transmitted / received between the client terminals or between the client terminal and the application server; A presence determination table in which presence information indicating the state of the terminal or server is stored in advance, corresponding to session information including:
A presence information table in which identification information of the client terminal or the application server and presence information of the client terminal or the application server are stored correspondingly;
A processing unit for identifying presence information based on predetermined information from the session management server and registering the presence information in the presence information table;
The processor is
Receiving a notification request including identification information of the client terminal or the application server of the referred person to whom presence information is referred from the client terminal or the application server of the reference person;
From the session management server that has received the message for establishing or disconnecting the session, the request method or the session name included in the message, the destination identification information, and the session information including the transmission source identification information are received,
Based on the received request method or session information including the session name, transmission destination identification information and transmission source identification information, refer to the presence determination table to obtain corresponding presence information;
Corresponding received destination identification information or source identification information and the acquired presence information are stored in the presence information table,
The presence server that notifies the presence information to the client terminal or the application server of the referrer who has received the notification request including the transmission destination identification information or the transmission source identification information. The processor is
A request method for establishing or disconnecting a session, or a session information notification packet created including a message including session information including a session name, transmission destination identification information, and transmission source identification information is received, and the request is received from the packet. Extract session information including method or session name, destination identification information and source identification information,
The presence server according to claim 1, wherein the presence determination table is acquired by referring to the presence determination table based on each extracted information. Subscription in which identification information of the client terminal or the application server as a reference to presence information and identification information of the client terminal or the application server as a referenced person to which presence information is referenced are registered correspondingly Further equipped with a table
The processor is
When presence information stored in the presence information table is updated or newly registered, the presence information and identification information of the corresponding referred person are acquired from the presence information table,
Refer to the subscription table based on the acquired identification information of the referenced person, to obtain the identification information of the corresponding reference person,
The presence server according to claim 1 or 2, wherein the presence information acquired is notified to the client terminal or the application server according to the identification information of the referrer. Corresponding to the identification information of the referred person and the identification information of the reference person, the granularity indicating the fineness of the information shown to the reference person by the referenced person further includes a granularity determination table registered in advance,
The presence information of the presence determination table includes presence information for each granularity,
The processor is
Based on the identification information of the referred person acquired from the presence information table and the identification information of the reference person acquired from the subscription table, the corresponding granularity is acquired from the granularity determination table,
The presence server according to claim 3, wherein presence information of the granularity among the presence information in the presence information table is notified to the client terminal or the application server as a reference. The presence determination table further stores a presence identifier corresponding to session information including a request method or a session name, transmission destination identification information, and transmission source identification information,
The presence information table stores presence information for each presence identifier for each identification information,
The presence server according to claim 1, wherein the granularity determination table stores a granularity for each presence identifier. The destination identification information is To header information of a SIP message,
The presence server according to claim 1, wherein the transmission source identification information is From header information of a SIP message. A session management server for managing a session between client terminals or between a client terminal and an application server;
A presence server for managing presence information indicating the state of the client terminal and the application server, and notifying the presence information to a predetermined client terminal and application server,
The presence server
A request method or a session name, a destination identification information, and a transmission source identification information representing the purpose of a request in a message for establishing or disconnecting a session transmitted / received between the client terminals or between the client terminal and the application server; Corresponding to the session information including the presence determination table in which presence information indicating the state of the client terminal or the application server is stored in advance,
A presence information table in which identification information of the client terminal or the application server and presence information of the terminal or the server are stored correspondingly;
A processing unit for identifying presence information based on predetermined information from the session management server and registering the presence information in the presence information table;
The session management server receives a message for establishing or disconnecting a session, and transmits session information including a request method or a session name, transmission destination identification information, and transmission source identification information included in the message to the presence server. And
The presence server
Receiving a notification request including identification information of the client terminal or the application server of the referred person to whom presence information is referred from the client terminal or the application server of the reference person;
Receiving session information including a request method or a session name, destination identification information, and transmission source identification information included in the message from the session management server that has received the message for establishing or disconnecting a session;
Based on the received request method or session information including the session name, transmission destination identification information and transmission source identification information, refer to the presence determination table to obtain corresponding presence information;
Corresponding received destination identification information or source identification information and the acquired presence information are stored in the presence information table,
A session information management system for notifying the presence information to the client terminal or the application server of a referrer who has received a notification request including the transmission destination identification information or the transmission source identification information.

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