JP4531593B2 - Notification device, notified device, and status notification method - Google Patents

Description

The present invention relates to an apparatus and a method for notifying a state of an apparatus or a user, and in particular, a notification for notifying a state only when the state duration, state change time, and state change history of the apparatus or user state satisfy a predetermined condition. The present invention relates to a device, a notified device, and a status notification method.

  In recent years, a presence service that can know the connection state (online / offline) of a communication partner has been put to practical use in IM (Instant Message) or the like. In addition, as a presence service in a company, a service for notifying a communication partner's presence status (present / absent) via a network is becoming widespread.

  One method for providing such a service is a SIP event notification function compliant with the SIP (Session Initiation Protocol) protocol (see Non-Patent Document 1). When implementing a presence service in a company using the SIP event notification function, a presence server is installed to manage the employee status, and when the employee status changes, the status change notification is sent to the device requesting the status notification. Send.

  FIG. 34 is a diagram showing an example of a network configuration in a presence service using a conventional SIP event notification function. Personal computers (hereinafter referred to as “PCs”) 701 to 704 are connected via an in-house LAN (Local Area Network) 710 to acquire the presence status (attended / not present) status of the user who uses the PC. Yes. The presence server device 700 manages the status of the user who uses the PCs 701 to 704, and notifies the status change request to the device that has requested the status notification when the status of the user has changed. For example, when the status of the PC 701 changes from “present” to “absent”, the PC 701 registers the status “absent” in the presence server device 700. When the PC 704 makes a status notification request for the PC 701, the presence server apparatus 100 updates the status of the PC 701 from “present” to “absent” and then changes the status to the PC 704 requesting the status notification of the PC 701. To be notified.

  A message conforming to the SIP protocol used for notification of such a state change will be described with reference to FIG. FIG. 35 is a diagram showing an example of a message flow in the presence service compliant with the SIP protocol. The PC 701 transmits a PUBLISH message describing the state of the user of the device itself to the presence server, and registers the current user state in the presence server 701. When the presence server device 700 receives the PUBLISH message and registers the state of the user of the PC 701, it returns a 200 OK response. The PC 704 transmits a SUBSCRIBE message describing the URI of the PC 701 to the presence server device 700 in order to request a status notification of the PC 701. When the presence server device 700 receives the notification request by receiving the SUBSCRIBE message, it returns a 200 OK response. Thereafter, the presence server device 700 transmits a NOTIFY message describing the state of the user of the PC 701 to the PC 704. When the PC 704 receives the NOTIFY message and acquires the status of the user of the PC 701, it returns a 200 OK response to the presence server apparatus 700. Thereafter, the PC 701 transmits a PUBLISH message to the presence server device 700 every time the state of the user of the device changes. Upon receiving the PUBLISH message from the PC 701, the presence server device 700 transmits a NOTIFY message describing the state of the PC 701 to the PC 704.

  By using the SIP event notification function in this way, a status notification service represented by a presence service can be realized. In the future, it is expected that services that notify the status of all devices connected to the network will be put to practical use. However, as the number of notification states and devices increase, an increase in processing load on the server managing the state becomes a problem, and it is necessary to reduce the load.

  As a conventional method for reducing the processing load, for example, there is an event filter proposed in the SIMPLE (SIP for Instant Messaging and Presence Leveraging Extensions) working group of the Internet Engineering Task Force (IETF). The event filter will be described with reference to FIG. FIG. 36 is a diagram showing an example of a message flow of the event filter.

  In the event filter, a NOTIFY message can be transmitted only when the user who uses the device enters a specified state. When the PC 704 transmits a SUBSCRIBE message, the condition for generating the NOTIFY message is described in the body part of the SUBSCRIBE message. In this example, a condition “notify only when the user using the PC 701 is absent” is described. In addition, although XML (Extensible Markup Language) is used for description of actual conditions, detailed description is omitted here. Upon receiving the SUBSCRIBE message, the presence server device 700 transmits a NOTIFY message describing the state of the user who uses the PC 701 to the PC 704. The first NOTIFY message transmitted after receiving the SUBSCRIBE message is transmitted even if the conditions described in the SUBSCRIBE message are not satisfied.

  After that, the presence server device 700 does not transmit the NOTIFY message when receiving the PUBLISH message for registering the state of “present”, and only sends the NOTIFY message to the PC 704 when receiving the PUBLISH message for registering the state of “absent”. Send.

As described above, since the event filter transmits the NOTIFY message only when the conditions specified by the PC 704 are satisfied, unnecessary NOTIFY message traffic is reduced, network resources can be used effectively, and the processing load related to the NOTIFY message transmission of the presence server device 700 can be reduced. Can be reduced.
Session Initiation Protocol (sip), February 24, 2005, [February 24, 2005 search], Internet <http: // www. ietf. org / html. charters / sip-charter. html>

  However, in the conventional event filter described above, only the current state of the device or the user who uses the device can be specified, and it is impossible to specify the time when the state has continued or the time when the state has changed. For this reason, for example, notification cannot be specified only when the user has been “absent” for 10 minutes or more, and an unnecessary NOTIFY message has been transmitted. In addition, it has been impossible with a conventional event filter to specify a state change history of a device or a user as a specifiable condition. For example, it is impossible to specify an event such as notification only when the state of the user's whereabouts changes from “rest room → smoking room → break room”, and an eventual NOTIFY message is transmitted.

  The present invention has been made in view of the above points, and when notifying the status of a device connected to a network, by reducing unnecessary notifications, it is possible to effectively use network resources and reduce the processing load of the presence server. It is an object of the present invention to provide a notification device, a notified device, and a state notification method that can be reduced.

  The notification device according to the first aspect of the present invention is the state duration information indicating the time during which the state issuer that can take various states as the time passes continues in the same state, and the state issuer changes the state. State change information storage means for storing state change information including at least one of state change time information indicating the changed time and change history information indicating a change history of the state issuer, and a state for setting a state change condition Whether or not the state of the issuer has changed based on the change condition setting means, the state change information stored in the state change information storage means, and the state change condition set by the state change condition setting means State change determination means for determining the state change, and when the state change determination means determines that the state of the issuer has changed, a state change that transmits a state change notification packet that notifies the state change It has a configuration and a broadcast information transmitting unit.

  With this configuration, the notification device of the present invention determines whether or not to notify the state according to the state change represented by at least one of the specified state duration, the state change time, or the change history. Since the determination can be made in more detail, unnecessary notifications can be reduced, network resources can be used effectively, and the processing load related to transmission / reception of the notification device and the notified device can be reduced.

  Further, in the notification device of the present invention, the state change information storage unit stores the state duration, the state change condition setting unit sets a state duration condition for specifying the state duration, and the state The change determination unit determines whether the state of the issuer has changed based on the state duration information stored in the state change information storage unit and the state duration condition set by the state change condition setting unit. You may have the structure which determines.

  With this configuration, the notification device of the present invention can specify the time during which the state continues as the state change condition. For example, by specifying a state change condition such as “notify only when the same duration continues for 1 minute or more” and set to notify only when the state change condition is satisfied, the state change is notified every time the state changes. There is no need. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the processing load related to transmission / reception of notification packets of the notification device and the notified device can be reduced.

  Further, in the notification device of the present invention, the state change information storage unit stores the state change time, the state change condition setting unit sets a state change time condition for designating a range of the state change time, The state change determination unit has changed the state of the issuer based on the state change time information stored in the state change information storage unit and the state change time condition set by the state change condition setting unit. It may have a configuration for determining whether or not.

  With this configuration, the notification device of the present invention can specify the time when the state changes as the state change condition. For example, when a state change condition such as “notify only when the state changes from 8 o'clock to 10 o'clock” is specified and notification is made only when the state change condition is satisfied, only the state change at the specified time is notified. This eliminates the need to notify a change in state every time the state changes. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the processing load related to transmission / reception of notification packets of the notification device and the notified device can be reduced.

  In the notification device of the present invention described above, the state change information storage unit further stores a state item representing a state of at least one state issuer and a state value of the state item, and the state change condition setting unit. Further sets a state value condition of the state item that specifies the state item and the state value of the state item, and the state change determination unit includes the state item stored in the state change information storage unit and the state item. A configuration for determining whether or not the state of the issuer has changed based on the state value information of the state item and the state item set by the state change condition setting unit and the state value condition of the state item. You may have.

  With this configuration, the notification device of the present invention specifies at least one state item and the state value of the state item in addition to the state duration time in which the state has continued or the state change time at which the state has changed as the state change condition. Is possible. For example, if a state change condition such as “notify only when the user leaves the office from 8 o'clock to 10 o'clock” is specified and notification is set only when the state change condition is met, the specified state duration or state change time is set. Only a change in a specific state can be notified, and it is not necessary to notify a change in state every time the state changes. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the processing load related to transmission / reception of notification packets of the notification device and the notified device can be reduced.

  Further, in the notification device of the present invention, the state change information storage means stores change history information representing a history of changes in the state value of at least one of the state issuer and the state item, The state change condition setting means sets a history condition for designating the state item and a change in the state value of the state item, and the state change determination means includes the state item stored in the state change information storage means and The issuance based on the change history information representing a history of change of the state value of the state item, the state item set by the state change condition setting means, and the change history condition of the state value of the state item You may have the structure which determines whether the state of the body changed.

  With this configuration, the notification device of the present invention can specify a state item and a state value change pattern of the state item as a state change condition. For example, if you specify a state change condition such as “Notify only when the user's whereabouts changed from a break room to a smoking room → a break room” and set to notify only when the state change condition is met, the specified state item Only the change of the change pattern of the state value of the state item can be notified, and it is not necessary to notify the change of the state every time the state changes. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the processing load related to transmission / reception of notification packets of the notification device and the notified device can be reduced.

  In the notification device of the present invention, the state change information storage unit stores a plurality of state change information for each of the plurality of state issuers, and the state change condition setting unit includes a plurality of each of the plurality of state issuers. A state change condition and a logical condition between the plurality of state change conditions, and the state change determination means includes the plurality of state change information stored in the state change information storage means and the state change condition setting. You may have the structure which determines whether the state of the said issuer of the said several state issuer changed based on the logical condition between the said several state change conditions set by the means.

  With this configuration, the notification device of the present invention can specify a logical condition between individual state change conditions of a plurality of state issuers as the state change condition. For example, by specifying a logical condition between individual state change conditions such as “notify only when user A's whereabouts are 10 minutes or more and user B's whereabouts are 10 minutes or more”, individual state change conditions If the notification is set only when the logical condition is satisfied, it is not necessary to notify the change of the state every time the state issuer changes. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the processing load related to transmission / reception of notification packets of the notification device and the notified device can be reduced.

  The notification device of the present invention further includes a change condition information receiving unit that receives a change condition information packet indicating the state change condition, wherein the state change condition setting unit receives the change received by the change condition information receiving unit. You may have the structure which sets the said state change condition based on a condition information packet.

  With this configuration, the notification device according to the present invention can set a state change condition from an external device, and thus can specify a more appropriate state change condition. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the load associated with the notification packet transmission / reception processing of the notification device and the notified device is reduced.

  In the notification device of the present invention, the state issuer may include the notification device, and the state change condition setting unit may set at least state change information of the notification device itself.

  With this configuration, the notification device of the present invention can specify the state of the notification device itself as a state change condition, and can specify a more complicated state change condition. As a result, notification can be made at an appropriate timing, network resources can be used effectively, and the load associated with the notification packet transmission / reception processing of the notification device and the notified device can be reduced.

  In the notification device of the present invention, the state change notification information transmitting means may have a configuration for transmitting the state change notification packet in conformity with a SIP (Session Initiation Protocol) protocol.

  With this configuration, the notification device of the present invention can specify the state change condition even when using the event notification function compliant with the SIP protocol, so that the network resource can be used effectively, and the notification device and the notified device can be used. The load related to the transmission / reception processing of the notification packet is reduced.

  The notified device of the second invention is connected via a network to a notification device that notifies the state of a state issuer that can take various states as time passes, and from the notification device to the state issuer The status information receiving means for receiving the status notification packet indicating the status, the status duration indicating the time that the status issuer continues the same status, and the time when the status issuer changes the status And a change condition transmitting means for transmitting a change condition information packet for notifying a state change condition for setting at least one of a change history representing a change history of the state issuer and a change history of the state issuer. It has the structure which receives the said state of a state issuer.

  With this configuration, the notified device according to the present invention can specify the state change condition based on at least one of the state duration, the time when the state changes, or the state change history. In addition, the notified device that receives the notification packet can receive the notification of the state at a timing desired by the user, and the application of the notified device can be easily developed.

  Moreover, the notified apparatus of this invention WHEREIN: The said change condition transmission means may have the structure which transmits the change condition information packet which designates the said state continuation time.

  With this configuration, the notified device of the present invention can specify the time during which the state has continued as the state change condition. For example, if you specify a state change condition such as “notify only when it continues for one minute or longer” and set to notify only when the state change condition is met, a change in state is notified each time the state changes. Since it is not necessary to receive the notification, it is possible to remove the notification in a state that is not required by the notified device, and the notified device that receives the notification packet can receive the notification of the state at a timing desired by the user. Can be easily developed.

  Moreover, the notified apparatus of this invention WHEREIN: The said change condition transmission means may have the structure which transmits the change condition information packet which designates the said state change time.

  With this configuration, the notified device of the present invention can specify the time when the state changes as the state change condition. For example, when a state change condition such as “notify only when the state changes from 8 o'clock to 10 o'clock” is specified and notification is set only when the state change condition is satisfied, the state change is changed every time the state changes. Since it is not necessary to receive notifications, notifications in a state not required by the notified device can be removed, and the notified device receiving the notification packet can receive the notification of the state at a timing desired by the user. Notification device applications can be easily developed.

  Further, in the notified device of the present invention, the change condition transmitting means further transmits a change condition information packet specifying a state item indicating the state of at least one state issuer and a state value of the state item. You may have.

  With this configuration, the notified device of the present invention specifies at least one state item and the state value of the state item in addition to the state duration time in which the state has continued or the state change time in which the state has changed as the state change condition. It becomes possible. For example, if a state change condition such as “notify only when the user leaves the office from 8 o'clock to 10 o'clock” is specified and notification is set only when the state change condition is met, the specified state duration or state change time is set. It is possible to receive notification only for a specific state change, and it is not necessary to be notified of a state change every time the state changes. The notified device that receives the notification packet can receive a notification of the state at a timing desired by the user, and an application of the notified device can be easily developed.

  Further, in the notified device of the present invention, the change condition transmitting means transmits at least one state item of the state issuer and a change condition information packet specifying a change in the state value of the state item. You may have.

  With this configuration, the notified device of the present invention can specify a state item and a change pattern of the state value of the state item as the state change condition. For example, if you specify a state change condition such as “Notify only when the user's whereabouts changed from a break room to a smoking room → a break room” and set to notify only when the state change condition is met, the specified state item It is possible to receive notification of only the change in the state value change pattern of the state item, and it is not necessary to be notified of the state change every time the state changes. The notified device that receives the notification packet can be notified of the state at a timing desired by the user, and an application of the notified device can be easily developed.

  In the notified device of the present invention, the change condition transmitting means transmits a plurality of state change conditions for each of the plurality of state issuers and a change condition information packet for designating a logical condition between the plurality of state change conditions. You may have a structure.

  With this configuration, the notified device of the present invention can specify a logical condition between individual state change conditions of a plurality of state issuers as the state change condition. For example, by specifying a logical condition between individual state change conditions such as “notify only when user A's whereabouts are 10 minutes or more and user B's whereabouts are 10 minutes or more”, individual state change conditions If it is set to receive notification only when the logical condition of is satisfied, it is not necessary to receive notification of a state change every time the state of each state issuer changes. The notified device that receives the notification packet can be notified of the state at a timing desired by the user, and an application of the notified device can be easily developed.

  Moreover, the notified apparatus of this invention WHEREIN: The said change condition transmission means may have the structure which transmits the change condition information packet which designates the state change condition of the said notification apparatus at least.

  With this configuration, the notified device of the present invention can specify the state of the notification device itself as a state change condition, and can specify a more complicated state change condition. As a result, notification can be made at an appropriate timing, network resources can be used effectively, and a load related to notification packet transmission / reception processing is reduced.

  In the notified device of the present invention, the change condition transmitting means may have a configuration for transmitting the change condition information packet in conformity with a SIP (Session Initiation Protocol) protocol.

  With this configuration, the notified device of the present invention can specify a state change condition even when using an event notification function compliant with the SIP protocol, so that network resources can be used effectively and notification packet transmission / reception processing can be performed. The load involved is reduced.

  The notification method according to the third aspect of the invention is a state duration information indicating a time during which a state issuer capable of taking various states according to the passage of time continues in the same state, and the state issuer changes the state. State change information storing step for storing state change information including at least one of state change time information indicating the changed time and change history information indicating a change history of the state issuer;

  Based on the state change condition setting step for setting the state change condition, the state change information stored in the state change information storage step, and the state change condition set in the state change condition setting step, State change determination step for determining whether or not the state has changed, and state change for transmitting a state change notification packet for notifying the state change when the state change determination step determines that the state of the issuer has changed. A notification packet transmission step.

  With this configuration, the notification method of the present invention notifies whether or not the state is notified in accordance with the state change represented by at least one of the specified state duration, the state change time, or the state change history. Therefore, unnecessary notifications can be reduced, network resources can be used effectively, and processing load related to transmission / reception of the notification device and the notified device can be reduced.

  Further, in the notification method of the present invention, the state change information storing step stores the state duration, and the state change condition setting step sets a state duration condition for designating the state duration, and the state The change determination step determines whether the state of the issuer has changed based on the state duration information stored in the state change information storage step and the state duration condition set in the state change condition setting step. You may have the structure which determines.

  With this configuration, the notification method of the present invention can specify the time during which the state continues as the state change condition. For example, by specifying a state change condition such as “notify only when the same duration continues for 1 minute or more” and set to notify only when the state change condition is satisfied, the state change is notified every time the state changes. There is no need. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the processing load related to transmission / reception of notification packets of the notification device and the notified device can be reduced.

  In the notification method of the present invention, the state change information storing step stores the state change time, and the state change condition setting step sets a state change time condition for designating a range of the state change time, In the state change determination step, the state of the issuer has changed based on the state change time information stored in the state change information storage step and the state change time condition set in the state change condition setting step. It may have a configuration for determining whether or not.

  With this configuration, the notification method of the present invention can specify the time when the state changes as the state change condition. For example, when a state change condition such as “notify only when the state changes from 8 o'clock to 10 o'clock” is specified and notification is made only when the state change condition is satisfied, only the state change at the specified time is notified. This eliminates the need to notify a change in state every time the state changes. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the processing load related to transmission / reception of notification packets of the notification device and the notified device can be reduced.

  In the notification method of the present invention, the state change information storing step further stores a state item representing a state of at least one state issuer and a state value of the state item, and the state change condition setting step further includes A state value condition of the state item that specifies the state item and the state value of the state item is set, and the state change determination step includes the state item and the state item stored in the state change information storage step And determining whether or not the status of the issuer has changed based on the status item set in the status change condition setting step and the status value condition of the status item. May be.

  With this configuration, the notification method of the present invention designates at least one state item and the state value of the state item in addition to the state duration time during which the state has continued or the state change time at which the state has changed as the state change condition. Is possible. For example, if a state change condition such as “notify only when the user leaves the office from 8 o'clock to 10 o'clock” is specified and notification is set only when the state change condition is met, the specified state duration or state change time is set. Only a change in a specific state can be notified, and it is not necessary to notify a change in state every time the state changes. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the processing load related to transmission / reception of notification packets of the notification device and the notified device can be reduced.

  Further, in the notification method of the present invention, the state change information storage step stores at least one state item of the state issuer and change history information representing a change history of the state value of the state item, The state change condition setting step sets a history condition for designating the state item and a change in the state value of the state item, and the state change determination step includes the state item stored in the state change information storage step. The issuance based on the change history information representing a history of change of the state value of the state item, the state item set by the state change condition setting step, and the change history condition of the state value of the state item You may have the structure which determines whether the state of the body changed.

  With this configuration, the notification method of the present invention can specify the state item and the change pattern of the state value of the state item as the state change condition. For example, if you specify a state change condition such as “Notify only when the user's whereabouts changed from a break room to a smoking room → a break room” and set to notify only when the state change condition is met, the specified state item Only the change of the change pattern of the state value of the state item can be notified, and it is not necessary to notify the change of the state every time the state changes. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the processing load related to transmission / reception of notification packets of the notification device and the notified device can be reduced.

  In the notification method of the present invention, the state change information storing step stores a plurality of state change information for each of the plurality of state issuers, and the state change condition setting step includes a plurality of each of the plurality of state issuers. State change conditions and logical conditions between the plurality of state change conditions are set, and the state change determination step includes the plurality of state change information stored in the state change information storage step and the state change condition setting. You may have the structure which determines whether the state of the said issuer of the said several state issuer changed based on the logical condition between these state change conditions set by the step.

  With this configuration, the notification method of the present invention can specify a logical condition between individual state change conditions of a plurality of state issuers as the state change condition. For example, by specifying a logical condition between individual state change conditions such as “notify only when user A's whereabouts are 10 minutes or more and user B's whereabouts are 10 minutes or more”, individual state change conditions If the notification is set only when the logical condition is satisfied, it is not necessary to notify the change of the state every time the state issuer changes. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the processing load related to transmission / reception of notification packets of the notification device and the notified device can be reduced.

  The notification method of the present invention further includes a change condition information packet receiving step for receiving a change condition information packet indicating the state change condition, wherein the state change condition setting step is received by the change condition information packet receiving step. You may have the structure which sets the said state change condition based on the said change condition information packet.

  With this configuration, the notification method of the present invention can set a state change condition from an external device, so that a more appropriate state change condition can be specified. As a result, unnecessary notifications are reduced, network resources can be used effectively, and the load associated with the notification packet transmission / reception processing of the notification device and the notified device is reduced.

  In the notification method of the present invention, the state issuer may include a state notification device, and the state change condition setting step may be configured to set at least state change information of the state notification device itself.

  With this configuration, the notification method of the present invention can specify the state of the notification device itself as a state change condition, and can specify a more complicated state change condition. As a result, notification can be made at an appropriate timing, network resources can be used effectively, and the load associated with the notification packet transmission / reception processing of the notification device and the notified device can be reduced.

  In the notification method of the present invention, the state change notification packet transmission step may have a configuration for transmitting the state change notification packet in conformity with a SIP protocol.

  With this configuration, the notification method of the present invention can specify the state change condition even when the event notification function compliant with the SIP protocol is used. Therefore, the network resource can be used effectively, and the notification device and the notified device can be used. The load related to the transmission / reception processing of the notification packet is reduced.

  The present invention reduces the unnecessary notification when notifying the status of a device connected to the network, thereby effectively using network resources and reducing the processing burden on the notification device and the notified device. A device, a notified device, and a status notification method can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)

  FIG. 1 is a block diagram illustrating a configuration of a network system to which a notification device and a notified device according to the first embodiment are applied.

  In FIG. 1, the network system includes a presence server device 100, an outside worker terminal 101, an office worker terminal 102, and an administrator terminal 103. The presence server device 100, an outside worker terminal 101, and an office worker terminal 102 are provided. The administrator terminal 103 is connected to each other via the network 110. The outside worker terminal 101 is a device operated by the user 121, such as a mobile phone or a personal digital assistance (hereinafter referred to as “PDA”), and the in-house worker terminal 102 is a device operated by the user 122, such as a PC. Whenever the status of the user 121 changes, the outside worker terminal 101 notifies the presence server device 100 of status information and registers the status of each user whenever the status of the user 122 changes. . The administrator terminal 103 is a device such as a PC that is operated by the user 130, has made a status notification request to the presence server device 100 in advance, and the presence server device 100 is a user of the office worker terminal 101 and the office worker terminal 102. 121 and user 122 status notifications are received. The presence server device 100 holds the statuses of the users 121 and 122 of the external worker terminal 101 and the internal worker terminal 102 based on the state information received from the external worker terminal 101 and the internal worker terminal 102, and The statuses of the users 121 and 122 of the worker terminal 101 and the office worker terminal 102 are notified.

  In the present embodiment, it is assumed that the user 130 inputs and sets a state change condition for specifying a state duration when making a state notification request to the presence server apparatus 100. As an example, a state change condition of “notify only when the same state continues for 1 minute or longer” is set, and the presence server apparatus 100 is in a state where the user status of the external worker terminal 101 or the internal worker terminal 102 is the same for 1 minute or longer. A case will be described in which status notification is sent to the administrator terminal 103 only when the process is continued.

  First, the message flow of the present embodiment will be described with reference to FIG. In this embodiment, communication is performed by applying the SIP protocol as an example, and all signals are transmitted and received in packets, but communication is performed by applying the Hyper Text Transfer Protocol (HTTP) protocol and other protocols. Obviously, the signal format may be different depending on the protocol to be applied. The same applies to the description after the second embodiment. In FIG. 2, the 200 OK response description for the PUBLISH message and the NOTIFY message is omitted for simplification, but a 200 OK response is actually returned for each message. It goes without saying that the same applies to the diagrams representing the message flow in FIG. The outside worker terminal 101 and the inside worker terminal 102 transmit a PUBLISH message to the presence server apparatus 100, and notify and register the states of the users 121 and 122 in advance.

  The user 130 sets a state change condition “notify only when the same state continues for 1 minute or more” to the presence server apparatus 100, and the URI of the administrator terminal 103 “sip: 103 @ Set "example.com".

  The outside worker terminal 101 and the inside worker terminal 102 transmit a PUBLISH message to the presence server device 100 every time the state of each of the users 121 and 122 changes. Upon receiving the PUBLISH message, the presence server device 100 starts a timer corresponding to the state duration described in the state change condition, and ends the timer after the time corresponding to the specified state duration has elapsed. If the state has not changed afterwards, it is determined that the state duration specified by the state change condition has been exceeded, and a NOTIFY message is transmitted to the administrator terminal 103.

  Here, returning to FIG. 1, a detailed description of this embodiment will be given.

  The outside worker terminal 101 and the inside worker terminal 102 notify at least one state item representing the state of the user and the state value of the state item.

  The outside worker terminal 101 represents the state of the user 101 by a state item meaning the current position “place”, for example. This status item “place” has status values such as “desk” and “1F_meeting” representing a living room or a first-floor meeting room, and “moving” representing moving. As a detection method of the current position, that is, the state item “place”, an RFID (Radio Frequency Identification) tag is mounted on the office worker terminal 101 and an RFID receiver is installed in a living room or a conference room. Various methods are conceivable, such as a method for detecting the state of a place, and when the office worker terminal 101 is powered off.

  The in-house worker terminal 102 is a device such as a PC installed in the user 122's room. The state of the user 122 means a presence state of “presence” indicating, for example, whether the in-house worker terminal 102 is currently used. Expressed as an item. This status item “presence” has two status values “open / closed” representing “present / absent”. In order to detect the presence status, that is, the status item “presence”, various methods such as “absent” when the screen saver of the office worker terminal 102 is activated and “attended” otherwise can be assumed.

  Note that the state items and their state values described here are only examples, and other state items and state values such as a radio wave intensity state and a network connection state may be included.

  When the status of each user changes, the external worker terminal 101 and the internal worker terminal 102 transmit a PUBLISH message to the presence server device 100 to register the state. Note that the address of the presence server apparatus 100 may be set in advance for each device, or may be acquired using other methods. As a state registration method, for example, when registering a state in which the presence of the office worker terminal 102 is present, the text “sip: 102@example.com; presence =” open ”is described in the body part of the PUBLISH message. It is possible. The text representing the state may be in XML or another format, and may be described in the header part instead of the body part. For status registration, other messages or protocols other than SIP may be used without using the PUBLISH message.

  When the administrator terminal 103 receives the NOTIFY message from the presence server apparatus 100, the administrator terminal 103 displays the information on the screen and informs the user 130 of the status of the user 121 and the user 122.

  The presence server device 100 holds the state change condition input from the user 130, and the administrator terminal only when the state change conditions of the user 121 and 122 of the outside worker terminal 101 and the office worker terminal 102 satisfy the set state change condition. A NOTIFY message is transmitted to 103. Details of the device configuration and operation of the presence server device 100 will be described later.

  The network 110 may be an in-house LAN, but may be other networks such as a home network or the Internet in addition to the in-house LAN.

  Next, the configuration and operation of the presence server apparatus 100 will be described in detail with reference to FIG. 3 and FIG. The presence server device 100 constitutes a notification device. For the sake of simplification, description of the operation of the 200 OK response to each message will be omitted, but it is assumed that there is a 200 OK response transmission / reception operation for all messages.

  First, the configuration of the presence server device 100 will be described. FIG. 3 is a block diagram showing a configuration of the presence server apparatus 100 in the present embodiment. As shown in FIG. 3, the presence server device 100 includes a control unit 201 that controls the operation of all the components that make up the presence server device 100, and URIs and states of all the devices that the presence server device 100 manages. A state management database 202 to be stored, a state change condition holding unit 203 for storing a state change condition and a notification destination URI, a message generation unit 204 for generating a signal including a notification destination URI and state information, an outside worker terminal 101, an office worker A communication unit 205 that transmits and receives signals to and from external devices such as the administrator terminal 102 and the administrator terminal 103, a screen output unit 206 that outputs information to a screen (not shown) of the presence server apparatus 100, and information input from the screen And an input receiving unit 207. The screen output unit 206 and the input reception unit 207 may be configured with a touch panel, for example.

  In the present embodiment, the input receiving unit 207 inputs the state change condition and the notification destination URI. The state change condition holding unit 203 stores the input state change condition. The input receiving unit 207 and the state change condition holding unit 203 constitute a state change condition setting unit.

  The state management database 202 stores state change information of the user 121 and the user 122 based on the state information of the user 121 and the user 122 from the outside worker terminal 101 and the office worker terminal 102 received via the communication unit 205. And constitutes state change information storage means.

  The control unit 201 compares the state change information stored in the state change condition storage unit 203 with the state change information stored in the state management database 202 and the state change information stored in the state change condition holding unit 203. In addition, it is determined whether or not the states of the user 121 and the user 122 have changed beyond a predetermined degree, and constitutes a state change determination means.

  Further, the communication unit 205 is configured to transmit a NOTIFY message including state information to the administrator terminal 103 when the control unit 201 determines that the user's state has changed beyond a predetermined level. A change notification information transmitting unit is configured.

  Next, an operation executed when the presence server apparatus 100 sets the state change condition will be described with reference to FIGS. FIG. 4 is a flowchart showing an operation executed when the presence server apparatus 100 according to the present embodiment sets a state change condition.

  First, the control unit 201 sends an instruction to display a screen for inputting a state change condition and a notification destination URI to the screen output unit 206 to display the input screen (S1), and waits for an input from the user 130 (S2). When the state change condition and the notification destination URI are input from the user 130 via the input receiving unit 207, the information is sent from the input receiving unit 207 to the control unit 201 (S3). Here, it is assumed that the state duration is set as the state change condition. Specifically, it is assumed that a condition “notify only when the same state continues for 1 minute or more” is input, and the URI of the administrator terminal 103 is input as a notification destination URI. As a method of inputting the state change condition and the notification destination URI, various methods such as selecting an appropriate condition or URI from a plurality of preset state change conditions and the notification destination URI can be assumed.

  The control unit 201 converts the input state change condition into a predetermined format (S4). Here, the format is converted to “Continuing_time> = 1 min”. The format of the state change condition may be other formats such as XML.

  The control unit 201 stores the state change condition and the notification destination URI in the state change condition holding unit 203 (S5). Here, “Continuing_time> = 1 min” is stored as the state change condition, and “sip: 103@examle.com”, which is the URI of the administrator terminal 103, is stored as the notification destination URI. Note that the state change condition holding unit 203 can store a plurality of state change conditions and a notification destination URI. Details of the data structure stored in the state change condition holding unit 203 will be described later. In the present embodiment, the state change condition is set via the input receiving unit 207, but the user 130 operates the administrator terminal 103 without using the input receiving unit 207, and the presence server device 100. It goes without saying that a change condition information packet having state change condition and notification destination URI information may be transmitted to the communication unit 205 and set. A method in which the administrator terminal 103 communicates with the presence server apparatus 100 via the communication unit 205 to input and set the state change condition and the notification destination URI will be described later in the sixth embodiment.

  The operation executed after the presence server device 100 receives the PUBLISH message will be described with reference to FIGS. FIG. 5 is a flowchart showing an operation performed by the presence server apparatus 100 according to the present embodiment after receiving the PUBLISH message.

  First, the communication unit 205 receives a PUBLISH message from the external worker terminal 101 or the internal worker terminal 102 (S101), and sends the received PUBLISH message to the control unit 201 (S102). The control unit 201 stores the user status information described in the PUBLISH message in the status management database 202 (S103). For example, when a state of “sip: 102@example.com: presence =“ open ”” indicating that the user 122 of the office worker terminal 102 is present is described in the PUBLISH message, the office worker terminal 102 is displayed. The state value of the URI state item “presence” “sip: 102@example.com” to be designated is changed to “open”. Details of the structure of data stored in the state management database 202 will be described later.

  The control unit 201 acquires the state change condition and the notification destination URI stored in the state change condition holding unit 203 (S104). Since the state change condition obtains “Continuing_time> = 1 min”, which means “notify only when the same state continues for 1 minute or longer”, the control unit 201 corresponds to the state duration specified by the state change condition. A timer for 1 minute, i.e. 1 minute, is started (S105). When the timer expires (S106), the current state of the device notified by the PUBLISH message is acquired from the state management database 202 (S107). Here, the state when the PUBLISH message is received is compared with the acquired current state (S108). If the state changes, the process ends without generating a NOTIFY message. If the state does not change, it is determined that the same state has been continued beyond the state duration specified in the state change condition, and state management is performed. The status information and notification destination URI of the user 122 of the office worker terminal 102 acquired from the database 202 are sent to the message generation unit 204 (S109). The message generation unit 204 describes the notification destination URI in the Request-URI, and the status of the user 122 Is generated in the body part (S110). The message generation unit 204 sends the generated NOTIFY message to the communication unit 205 (S111), and the communication unit 205 transmits the NOTIFY message to the administrator terminal 103 (S112).

  Next, the configuration and operation of the administrator terminal 103 will be described with reference to FIGS. The administrator terminal 103 constitutes a notified device.

  A configuration of the administrator terminal 103 will be described. FIG. 6 is a block diagram showing the configuration of the administrator terminal 103 in the present embodiment. As shown in FIG. 6, the administrator terminal 103 outputs information to a control unit 301 that controls the operation of all the components constituting the administrator terminal 103 and a screen (not shown) of the administrator terminal 103. A screen output unit 302 and a communication unit 303 that transmits / receives signals to / from external devices such as the presence server device 100, the outside worker terminal 101, and the office worker terminal 102 are configured.

  In the present embodiment, the communication unit 303 constitutes status information receiving means for receiving signals indicating the status of the user 121 of the outside worker terminal 101 and the user 122 of the office worker terminal 102 from the presence server device 100.

  The NOTIFY message reception operation executed by the administrator terminal 103 will be described with reference to FIGS. FIG. 7 is a flowchart of the operation executed after the administrator terminal 103 receives the NOTIFY message according to the present embodiment.

  First, the communication unit 303 receives a NOTIFY message (S201), and sends the received NOTIFY message to the control unit 301 (S202). The control unit 301 sends a command to display the state described in the NOTIFY message on the screen output unit 302, and displays the state on the screen (S203). For example, if the state described in the NOTIFY message is "sip: 101@example.com: place =" 1F_meeting "", a text message "External worker terminal 101: Place 1F meeting room" is displayed on the screen. Let Note that the form of displaying information on the screen may be an icon display or other forms. Further, in the present embodiment, the state is notified by displaying on the screen, but it goes without saying that the state may be notified by using a sound or other methods without being displayed on the screen.

  Next, messages included in the NOTIFY message in this embodiment will be described. FIG. 8 is a block diagram showing the data structure of the NOTIFY message transmitted from the presence server apparatus 100 to the administrator terminal 103 in the present embodiment. Note that the messages included in the PUBLISH message are the same as those used in normal SIP, and a description thereof will be omitted. Further, the message shown in FIG. 8 is omitted except for the parts necessary for the explanation, and the actual message has, for example, another header. The same applies to the block diagrams showing the structure of the message data described in FIG.

  As shown in FIG. 8, the URI of the administrator terminal 103 held in the notification destination URI of the state change condition holding unit 203 is described as a Request-URI. In the Event header, “presence” representing a presence event is described. In the body part, for example, the user's state “external worker terminal 101 is in the first floor conference room” acquired from the state management database 202 is described. Note that the user status may be described in the header portion using an extension header.

  Next, the structure of data stored in the state management database 202 and the state change condition holding unit 203 will be described.

  First, the structure of data stored in the state management database 202 will be described with reference to FIG. FIG. 9 is a block diagram showing the structure of data stored in the state management database 202 in the present embodiment.

  The state management database 202 is a database that holds URIs and states of all devices managed by the presence server apparatus 100, and stores device URIs, one or more state items for each device, and state values of the state items. Has been.

  In the example illustrated in FIG. 9, a device having a URI “sip: 101@example.com” has a state value “elevator” indicating an elevator for the state item “place”. This is a message that the outside worker terminal 101 is in the current position and elevator state, which means that the outside worker terminal 101 or the user 121 of the outside worker terminal 101 is currently at the elevator location. As the status item to be held, various items such as “network” indicating the connection status to the network can be considered other than the example described in FIG.

  Next, the structure of data stored in the state change condition holding unit 203 will be described with reference to FIG. FIG. 10 is a block diagram showing a data structure stored in the state change condition holding unit 203 in the present embodiment.

  The state change condition holding unit 203 stores the state change condition set by the user and the notification destination URI. A plurality of state change conditions and notification destination URIs can be stored.

  In the example shown in FIG. 10, when the state change condition “notify only when the same state continues for 1 minute or more” represented by “Continuing_time> = 1 min” is satisfied, “sip: 103@example.com ”Indicates that the administrator terminal 103 indicated by the notification destination URI is notified.

  As described above, in the present embodiment, the user 130 sets a state change condition “notify only when the same state continues for one minute or longer” to the presence server apparatus 100, and the presence server apparatus 100 changes the state. An example in which a NOTIFY message is transmitted to the administrator terminal 103 only when the condition is satisfied has been shown. As a result, unnecessary NOTIFY messages are not transmitted, network resources can be used effectively, and the load related to transmission / reception of NOTIFY messages between the presence server apparatus 100 and the administrator terminal 103 is reduced.

  Further, the administrator terminal 103 can receive a status notification at a desired timing, and the user can receive a status notification at a necessary timing.

In the present embodiment, the presence server device 100 measures the state duration of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102 and exceeds the state duration indicated by the state change condition. However, even if the administrator terminal 103 is provided with a function for measuring and determining the state duration time, it is possible to notify the state at a timing required by the user. For example, the presence server device 100 transmits a NOTIFY message to the administrator terminal 103 whenever the statuses of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102 change. The administrator terminal 103 measures the state duration from the received NOTIFY message, and when it is determined that the state duration is equal to or longer than the state duration indicated by the state change condition preset in the administrator terminal 103, the administrator terminal 103 By notifying the status, the user 130 can receive the status notification at a necessary timing. In the present embodiment, the users 121 and 122 of the external worker terminal 101 and the internal worker terminal 102 constitute a state issuer, and the change in the state of the users 121 and 122 is the subject of notification. It is also possible that the status of the office worker terminal 102 constitutes a status issuer, and the status of various people and things may be targeted for notification, such as the status change of the office worker terminal 101 and the office worker terminal 102 itself. Needless to say.
(Second Embodiment)

  The configurations of the presence server device, the administrator terminal, and the network system according to the second embodiment of the present invention are the same as the configurations of the presence server device, the administrator terminal, and the network system according to the first embodiment. The description is omitted.

  In the present embodiment, it is assumed that the user 130 inputs and sets a state change condition that specifies a state change time range in which the state has changed when making a state notification request to the presence server apparatus 100. As an example, a state change condition of “notify only when the state changes between 10 o'clock and 11 o'clock” is set, and the presence server apparatus 100 has a user status of the outside worker terminal 101 or the inside worker terminal 102 between 10 o'clock and 11 o'clock. A case will be described in which status notification is sent to the administrator terminal 103 only when the status changes to.

  First, the message flow of this embodiment will be described with reference to FIG.

  The office worker terminal 101 and the office worker terminal 102 transmit a PUBLISH message to the presence server apparatus 100 and notify and register the states of the users 121 and 122 in advance.

  The user 130 sets a state change time range as a state change condition to the presence server device 100, specifically, “notify only when the state changes between 10:00 and 11:00”, and an administrator as a notification destination URI Set “sip: 103@example.com”, which is the URI of the terminal 103.

  The outside worker terminal 101 and the inside worker terminal 102 transmit a PUBLISH message to the presence server device 100 each time the state of the users 121 and 122 changes. When the presence server device 100 receives the PUBLISH message, the presence server device 100 holds the current time as the state change time, and transmits a NOTIFY message to the administrator terminal 103 only when the state change time satisfies the state change condition.

  Next, details of operations executed by the presence server apparatus 100 will be described. Note that the device configuration and state change condition setting operation of the presence server device 100 are the same as those in the first embodiment, and a description thereof will be omitted. The apparatus configuration and operation of the administrator terminal 103 are also the same as those in the first embodiment, and a description thereof will be omitted.

  First, operations performed by the presence server apparatus 100 after receiving the PUBLISH message will be described with reference to FIGS. FIG. 12 is a flowchart showing an operation performed after the presence server device 100 according to the present embodiment receives a PUBLISH message.

  First, the communication unit 205 receives a PUBLISH message (S301), and sends the received PUBLISH message to the control unit 201 (S302). The control unit 201 stores the state described in the PUBLISH message and the current time in the state management database 202 (S303).

  For example, when a state of “sip: 102@example.com: presence =“ open ”” indicating that the user 122 of the office worker terminal 102 is present is described in the PUBLISH message, the office worker terminal 102 is displayed. The status value of the status item “presence” possessed by the specified URI “sip: 102@example.com” is changed to “open”. Further, the current time is stored in the state management database 202 as the state change time. Details of the data structure stored in the state management database 202 will be described later.

  The control unit 201 acquires the state change condition and the notification destination URI stored in the state change condition holding unit 203 (S304). Since “10:00:00 <= Changed_time <= 11: 00: 00”, which means a condition “notify only when the state changes between 10:00 and 11:00”, is acquired as the state change condition, the control unit 201 Then, it is determined whether the time when the user 122 of the office worker terminal 102 stored in the state management database 202 changes the state is within the time range specified by the state change condition acquired in step S304 (S305). If the state change time is not within the time range specified by the state change condition, the process ends without generating a NOTIFY message. When the time when the state changes falls within the time range specified by the state change condition, the state information and notification destination of the user 122 of the office worker terminal 102 described in the PUBLISH message and stored in the state management database 202 The URI is sent to the message generator 204 (S306). Note that the processes from step S307 to S309 are the same as the processes from step S110 to S112 of the first embodiment, and thus description thereof is omitted.

  Next, messages included in the NOTIFY message in this embodiment will be described. FIG. 13 is a block diagram showing the data structure of the NOTIFY message transmitted from the presence server apparatus 100 to the administrator terminal 103 in the present embodiment.

  As shown in FIG. 13, the URI of the administrator terminal 103 held in the notification destination URI of the state change condition holding unit is described as the Request-URI. In the Event header, “presence” representing a presence event is described. In the body part, for example, the state of the user acquired from the state management database 202, for example, “the office worker terminal 101 was in the first floor hall at 10:59:33 Japan time”, and the time when the state changed are described. Note that the state and the time when the state changes may be described in the header portion using an extension header.

  Next, the data structure stored in the state management database 202 will be described with reference to FIG. Note that the structure of data stored in the state change condition holding unit 203 is the same as that in the first embodiment, and a description thereof will be omitted.

  FIG. 14 is a block diagram showing the structure of data stored in the state management database 202 in this embodiment.

  The state management database 202 is a database that holds the URIs and states of all devices managed by the presence server apparatus 100. The device URI and one or more state items, state values, and times at which the state changes for each device. Is held.

  In the example described in FIG. 14, a device having a URI “sip: 101@example.com” has a state value “elevator” indicating an elevator for the state item “place”, and the state has changed. It indicates that the time has a value of “10: 58: 51 + 900” indicating that the time is 10:58:51 in Japan time. This is a message that the outside worker terminal 101 has changed the current position to the elevator at 10:58:51 in Japan time, that is, the user 121 of the outside worker terminal 101 or the outside worker terminal 101 is 10 in Japan time. It means that it moved to the place of the elevator at hour 58 minutes 51 seconds. In addition to the example described in FIG. 14, various combinations such as “network” indicating the connection state to the network are conceivable as the set of state items and state values to be held.

  As described above, in the present embodiment, the user 130 sets a state change condition “notify only when the state changes between 10 o'clock and 11 o'clock” to the presence server apparatus 100, and the presence server apparatus 100 An example is shown in which a NOTIFY message is transmitted to the administrator terminal 103 only when the change condition is satisfied. As a result, unnecessary NOTIFY messages are not transmitted, network resources can be used effectively, and the load related to transmission / reception of NOTIFY messages between the presence server apparatus 100 and the administrator terminal 103 is reduced.

In the present embodiment, the presence server device 100 holds the state change times of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102, and these are within the time range indicated by the state change condition. Although the NOTIFY message was sent when it was determined that the administrator terminal 103 had the functions of holding the state change time and determining the state change condition, the user can be notified of the status at the required timing. It becomes. For example, the presence server device 100 transmits a NOTIFY message to the administrator terminal 103 whenever the statuses of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102 change. The administrator terminal 103 holds the state change time of the received NOTIFY message, and if it is determined that it is within the time range indicated by the state change condition preset in the administrator terminal 103, the administrator terminal 103 By notifying the status to the user, the user can receive the status notification at a necessary timing. In the present embodiment, the users 121 and 122 of the external worker terminal 101 and the internal worker terminal 102 constitute a state issuer, and the change in the state of the users 121 and 122 is the subject of notification. It is also possible that the status of the office worker terminal 102 constitutes a status issuer, and the status of various people and things may be targeted for notification, such as the status change of the office worker terminal 101 and the office worker terminal 102 itself. Needless to say.
(Third embodiment)

  The configurations of the presence server device, the administrator terminal, and the network system according to the third embodiment of the present invention are the same as the configurations of the presence server device, the administrator terminal, and the network system according to the first embodiment. The description is omitted.

  In the present embodiment, when the user 130 makes a status notification request to the presence server apparatus 100, the user 130 inputs at least one status item, a status value of the status item, and a status change condition that specifies a status change time range. And set it. As an example, a state change condition of “notify only when the location of the outside worker terminal 101 becomes a first floor conference room between 10:00 and 12:00” is set, and the presence server device 100 determines the state of the user 121 of the outside worker terminal 101. The case where state notification is performed only when the place becomes the first floor conference room between 10:00 and 12:00 will be described.

  First, the message flow of this embodiment will be described with reference to FIG.

  The office worker terminal 101 and the office worker terminal 102 transmit a PUBLISH message to the presence server apparatus 100, and notify and register the states of the users 121 and 122 in advance.

  The user 130 sends to the presence server apparatus 100 at least one status item of the device, a status value of the status item, and a status change time range as a status change condition, specifically, “the location of the outside worker terminal 101 is 10 “Notify only when IF conference room is set between 12:00” and “sip: 103@example.com”, which is the URI of the administrator terminal 103, is set as the notification destination URI.

  The outside worker terminal 101 and the inside worker terminal 102 transmit a PUBLISH message to the presence server device 100 each time the state of the users 121 and 122 changes. When the presence server device 100 receives the PUBLISH message, the presence server device 100 holds the state item, state value, and state change time of the device or user, and only when the state item, state value, and state change time satisfy the state change condition, In response, a NOTIFY message is sent.

  Next, details of operations executed by the presence server apparatus 100 will be described. Note that the device configuration and state change condition setting operation of the presence server device 100 are the same as those in the first embodiment, and a description thereof will be omitted. The apparatus configuration and operation of the administrator terminal 103 are also the same as those in the first embodiment, and a description thereof will be omitted. Further, since the data structure of the NOTIFY message message to be transmitted is the same as that of the second embodiment, description thereof is omitted.

  First, the operation performed after the presence server device 100 receives the PUBLISH message will be described with reference to FIGS. FIG. 16 is a flowchart showing an operation executed after the presence server device 100 according to the present embodiment receives a PUBLISH message.

  Here, the processes from step S401 to S405 are the same as the processes from step S301 to S305 of the second embodiment, and thus description thereof is omitted.

  In step S305, if the state change time is within the time range described in the state change condition, the state item of the external worker terminal 101 described in the PUBLISH message and stored in the state management database 202 and the state item It is determined whether or not the status value matches the status item described in the status change condition and the status value of the status item (S406). If not, exit without generating a NOTIFY message. If they match, the process proceeds to step S407, and a NOTIFY message is generated and transmitted. Note that the processes from step S407 to S410 are the same as the processes from step S306 to S309 of the second embodiment, and thus description thereof is omitted.

  As described above, in the present embodiment, the user 130 sets the state change condition “notify only when the location of the outside worker terminal 101 becomes an IF conference room between 10:00 and 12:00” to the presence server apparatus 100. In the example, the presence server apparatus 100 transmits the NOTIFY message to the administrator terminal 103 only when the state change condition is satisfied. As a result, unnecessary NOTIFY messages are not transmitted, network resources can be used effectively, and the load related to transmission / reception of NOTIFY messages between the presence server apparatus 100 and the administrator terminal 103 is reduced.

In the present embodiment, the presence server device 100 holds the state change time, the state item and the state value of the state item for the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102, and the state change condition is set as the state change condition. When it is determined that the condition is satisfied, the NOTIFY message is transmitted. However, the administrator terminal 103 has a function of holding the state change time, the state item and the state value of the state item, and determining the state change condition. In addition, it is possible to notify the status at a timing required by the user. For example, the presence server device 100 transmits a NOTIFY message to the administrator terminal 103 whenever the statuses of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102 change. When the administrator terminal 103 holds the state change time, the state item, and the state value of the state item of the received NOTIFY message, and it is determined that the state change condition set in advance in the administrator terminal 103 is satisfied By notifying the user of the state, the user can receive the state notification at a necessary timing. Furthermore, in this embodiment, the state change time, the state item, and the state value of the state item are specified as the state change condition, but the present invention is not limited to this. Various state change conditions can be specified, such as state duration, one or more state items and their state values, or state duration, state change time, one or more state items and their combination. Is possible. In the present embodiment, the users 121 and 122 of the external worker terminal 101 and the internal worker terminal 102 constitute a state issuer, and the change in the state of the users 121 and 122 is the subject of notification. It is also possible that the status of various people and things may be the subject of notification, such as the status of the in-house worker terminal 102 and the change of the status of the external worker terminal 101 and the in-house worker terminal 102 itself being the subject of notification. Needless to say.
(Fourth embodiment)

  The configurations of the presence server device, the administrator terminal, and the network system according to the fourth embodiment of the present invention are the same as the configurations of the presence server device, the administrator terminal, and the network system according to the first embodiment. The description is omitted.

  In the present embodiment, when the user 130 makes a status notification request to the presence server apparatus 100, the user 130 inputs and sets a status change condition that specifies at least one status item and a status value change history of the status item. It shall be. As an example, a state change condition of “notify only when the location of the user 121 of the outside worker terminal 101 changes from a rest room to a smoking room → a rest room” is set, and the presence server device 100 only satisfies the state change condition. An example of status notification will be shown.

  First, the message flow of this embodiment will be described with reference to FIG.

  The office worker terminal 101 and the office worker terminal 102 transmit a PUBLISH message to the presence server apparatus 100 and notify and register the states of the users 121 and 122 in advance. Each time the presence server apparatus 100 receives a PUBLISH message, the presence server apparatus 100 updates the history of state changes that it holds.

  The user 130 sets “notify only when the location of the outside worker terminal 101 changes from the break room → the smoking room → the break room” to the presence server apparatus 100 as the state change condition, and the administrator terminal as the notification destination URI “Sip: 103@example.com” which is the URI of 103 is set in advance.

  The outside worker terminal 101 and the inside worker terminal 102 transmit a PUBLISH message to the presence server device 100 each time the state of the users 121 and 122 changes. Each time the presence server device 100 receives a PUBLISH message, it updates the history of the state and state change time, and transmits a NOTIFY message to the administrator terminal 103 only when the state change history of the user 121 satisfies the state change condition. .

  Next, details of operations executed by the presence server apparatus 100 will be described. Note that the device configuration and state change condition setting operation of the presence server device 100 are the same as those in the first embodiment, and a description thereof will be omitted. The apparatus configuration and operation of the administrator terminal 103 are also the same as those in the first embodiment, and a description thereof will be omitted.

  First, the operation executed after the presence server device 100 receives the PUBLISH message will be described with reference to FIGS. FIG. 18 is a flowchart showing an operation executed after the presence server device 100 according to the present embodiment receives a PUBLISH message.

  First, the communication unit 205 receives a PUBLISH message (S501), and sends the received PUBLISH message to the control unit 201 (S502). The control unit 201 stores the state described in the PUBLISH message in the state management database 202 (S503). At this time, the state management database 202 holds at least one state item and a change history of the state value of the state item, and updates the change history with the state described in the PUBLISH message as the latest state value.

  For example, if the state of “sip: 102@example.com: presence =" open "” indicating that the user 122 of the office worker terminal 102 is present is described in the PUBLISH message, it is updated to the latest state. And the already held state is updated as the past state. The data structure stored in the state management database 202 will be described later.

  The control unit 201 acquires the state change condition and the notification destination URI stored in the state change condition holding unit 203 (S504), and acquires the state history of the user 121 specified by the state change condition from the state management database 202. (S505). Here, it is determined whether or not the acquired change history of the user 121 satisfies the condition of the change history specified by the state change condition (S506). If the change history condition is not satisfied, the process ends without generating a NOTIFY message. If the change history condition is satisfied, the process proceeds to step S507, where a NOTIFY message is generated and transmitted. In addition, since the process from step S507 to S510 is the same as the process from step S306 to S309 of 2nd Embodiment, description is abbreviate | omitted.

  Next, the NOTIFY message in this embodiment will be described.

  FIG. 19 is a block diagram showing a data structure of a NOTIFY message transmitted from the presence server apparatus 100 to the administrator terminal 103 in the present embodiment.

  The URI of the administrator terminal 103 held in the notification destination URI of the state change condition holding unit is described as the Request-URI. In the Event header, “Time-Filter” representing an event related to time change is described. The body part describes the state acquired from the state management database 202 and the history of the time when the state changed. The state and the history of the time when the state has changed may be described in the header portion using an extension header.

  Next, the structure of data stored in the state management database 202 will be described. The structure of data stored in the state change condition holding unit 203 is the same as the structure of data stored in the state change condition holding unit 203 in the first embodiment described with reference to FIG. Description is omitted.

  FIG. 20 is a block diagram showing the structure of data stored in the state management database 202 in the present embodiment.

  The state management database 202 is a database that holds URIs and states of all devices managed by the presence server apparatus 100. The device URI, one or more state items for each device, state values and states of the state items A change history is stored for each time when the change occurs.

  In the example shown in FIG. 20, a device having a URI “sip: 101@example.com” has a state value “rest_room” indicating a rest room for the state item “place”, and the state change time Indicates that it has a value of "10:58:51 +900" indicating that it is 10:58:51 in Japan time, and there are multiple status items, status values of the status items, and status change time history Hold. In FIG. 19, the history change information of the change history of the three states is saved as the change history. However, the number of history changes of the history change information to be saved may be more or less. Only the history change information of the change history of the state changed within a certain time may be stored.

  As described above, in this embodiment, the user 130 notifies the presence server device 100 of the state change condition “notify only when the location of the outside worker terminal 101 changes from the rest room to the smoking room to the rest room”. In the example, the presence server apparatus 100 transmits the NOTIFY message to the administrator terminal 103 only when the state change history of the user 121 of the office worker terminal 101 satisfies the state change condition. As a result, unnecessary NOTIFY messages are not transmitted, network resources can be used effectively, and the load related to transmission / reception of NOTIFY messages between the presence server apparatus 100 and the administrator terminal 103 is reduced.

In the present embodiment, if the presence server device 100 holds the state change history of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102 and it is determined that the condition change condition is satisfied, NOTIFY Although the message has been transmitted, even if the administrator terminal 103 has functions for holding the state change history and determining the state change condition, it is possible to notify the state at a timing required by the user. For example, the presence server device 100 transmits a NOTIFY message to the administrator terminal 103 whenever the statuses of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102 change. The administrator terminal 103 holds the state change history of the received NOTIFY message, and notifies the user of the state when it is determined that the condition change condition preset in the administrator terminal 103 is satisfied. Thus, the user can receive a status notification at a necessary timing. Furthermore, in the present embodiment, the state change time, the state item, and history information of the state value of the state item are specified as the state change condition, but the present invention is not limited to this. Various state changes such as state duration, history information of one or more status items and status values of the status items, or status duration, status change time, combinations of one or more status items and history information of the status items It is possible to specify conditions. In the present embodiment, the users 121 and 122 of the external worker terminal 101 and the internal worker terminal 102 constitute a state issuer, and the change in the state of the users 121 and 122 is the subject of notification. It goes without saying that the status of the office worker terminal 102 constitutes the status issuer, and the status of the status of the office worker terminal 101 and the office worker terminal 102 itself may be the subject of notification. Yes.
(Fifth embodiment)

  The configurations of the presence server device, the administrator terminal, and the network system according to the fifth embodiment of the present invention are the same as the configurations of the presence server device, the administrator terminal, and the network system according to the first embodiment. The description is omitted.

  In the present embodiment, when the user 130 makes a status notification request to the presence server apparatus 100, a plurality of individual state change conditions individually corresponding to a plurality of devices or users, and the plurality of individual state change conditions. It is assumed that the entire state change condition that specifies the logical condition is input and set. As an example, the logical product between the individual state change condition of the user 121 of the external worker terminal 101 and the individual state change condition of the user 122 of the internal worker terminal 102 is “the location of the user 121 of the external worker terminal 101 is in the room. A logical condition “notify only when a certain state continues for 10 minutes or more and the presence state of the user 122 of the office worker terminal 102 is present for 10 minutes or more is set as an overall state change condition. In the presence server device 100, the state where the user 121 of the outside worker terminal 101 is in the room continues for 10 minutes or more, and the presence state of the user 122 of the office worker terminal 102 remains present for more than 10 minutes. A case will be described in which status notification is performed only in the case of having been performed.

  First, the message flow of this embodiment will be described with reference to FIG.

  The office worker terminal 101 and the office worker terminal 102 transmit a PUBLISH message to the presence server apparatus 100, and register the states of the users 121 and 122 in advance, respectively.

  The user 130 states to the presence server device 100 as a state change condition that “the location of the user 121 of the outside worker terminal 101 is in the room for 10 minutes or more and the presence state of the user 122 of the office worker terminal 102 is “Notify only when the user is present for 10 minutes or more” is set, and “sip: 103@example.com” that is the URI of the administrator terminal 103 is set as the notification destination URI.

  The outside worker terminal 101 and the inside worker terminal 102 transmit a PUBLISH message to the presence server device 100 each time the state of the users 121 and 122 changes. When the presence server device 100 receives the PUBLISH message, it sets a timer for the time described in each individual state change condition, and when the state of one device or user has not changed after the timer ends, the other device Alternatively, the user's status history is referred to, and the NOTIFY message is transmitted to the administrator terminal 103 only when the other device or user status also satisfies the corresponding individual status change condition.

  Next, details of operations executed by the presence server apparatus 100 will be described. Note that the device configuration and state change condition setting operation of the presence server device 100 are the same as those in the fourth embodiment, and thus description thereof is omitted. Further, since the device configuration and operation of the administrator terminal 103 are the same as those in the first embodiment, description thereof will be omitted.

  First, operations performed by the presence server device 100 after receiving the PUBLISH message will be described with reference to FIGS. FIG. 22 is a flowchart showing the operation executed after the presence server device 100 according to the present embodiment receives the PUBLISH message.

  Here, the processes from step S601 to S604 are the same as the processes from step S501 to S504 of the fourth embodiment, and thus description thereof is omitted. The control unit 201 starts a timer for the state duration described in each individual state change condition acquired in step S604 (S605). When the timer expires (S606), the state of one device or user described in the PUBLISH message is acquired from the state management database 202 (S607), and it is determined whether the state has changed (S608). If the status has changed, exit without generating a NOTIFY message. If the state has not changed, it is determined that the state duration specified by the individual state change condition for the device or user has been exceeded, and the process proceeds to step S609. Thereafter, the history of the other device or user described in the state change condition is acquired from the state management database 202 (S609), the state duration is calculated from the acquired state history, and the other device or user is calculated. It is determined whether or not the individual state change condition regarding the state exceeds the specified state duration (S610). If not, exit without generating a NOTIFY message. If exceeded, it is determined that all the state change conditions, that is, the logical conditions between the specified individual state change conditions are satisfied, and the process proceeds to step S611 to generate and transmit a NOTIFY message. In this embodiment, an example in which a NOTIFY message is transmitted only when all individual state change conditions are satisfied as a logical condition between a plurality of individual state change conditions (AND condition) is described. As a logical condition between state change conditions, it is possible to send a NOTIFY message only when one or more individual state change conditions are satisfied (OR condition) or not satisfied (NOT condition). It goes without saying that other logical conditions may be used. Further, the processes from step S611 to S614 are the same as the processes from step S306 to S309 of the second embodiment, and thus description thereof is omitted.

  Next, the NOTIFY message message in this embodiment will be described.

  FIG. 23 is a block diagram showing the data structure of the NOTIFY message transmitted from the presence server apparatus 100 to the administrator terminal 103 in the present embodiment.

  The URI of the administrator terminal 103 held in the notification destination URI of the state change condition holding unit is described as the Request-URI. In the Event header, “Time-Filter” representing an event related to the time state change of the state is described. In the body part, the states of a plurality of devices or users acquired from the state management database 202, that is, the states of the users 121 and 122 of the outside worker terminal 101 and the inside worker terminal 102, and the time when the state changed are described. Note that the state and the time when the state changes may be described in the header portion using an extension header.

  As described above, in the present embodiment, the user 130 sends a message to the presence server apparatus 100 that “the location of the user 121 of the outside worker terminal 101 is in the room for 10 minutes or more and the inside worker terminal 102 A logical condition between the individual state change conditions “notify only when the presence state of the user 122 is present for 10 minutes or longer” is set, and the presence server device 100 determines whether the presence state of the individual state change condition is An example in which a NOTIFY message is transmitted to the administrator terminal 103 only when the logical condition is satisfied has been shown. As a result, unnecessary NOTIFY messages are not transmitted, network resources can be used effectively, and the load related to transmission / reception of NOTIFY messages between the presence server apparatus 100 and the administrator terminal 103 is reduced.

In the present embodiment, the presence server device 100 holds the state change history and the state duration of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102, and it is determined that the condition change condition is satisfied. If the administrator terminal 103 has the functions of holding the state change history and the state duration and determining the state change condition, the user can be notified of the state at a necessary timing. It becomes possible. For example, the presence server device 100 transmits a NOTIFY message to the administrator terminal 103 whenever the statuses of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102 change. The administrator terminal 103 stores the state change history and state duration of the received NOTIFY message, and if it is determined that the condition change condition preset in the administrator terminal 103 is satisfied, the administrator terminal 103 By performing the notification, the user can receive a status notification at a necessary timing. In the present embodiment, the users 121 and 122 of the external worker terminal 101 and the internal worker terminal 102 constitute a state issuer, and the change in the state of the users 121 and 122 is the subject of notification. Of course, the office worker terminal 102 constitutes a status issuer, and the status of the outside worker terminal 101 and the office worker terminal 102 itself may be subject to notification, and various people and things may be targeted. .
(Sixth embodiment)

  The configuration of the presence server device, the administrator terminal, and the network system according to the sixth embodiment of the present invention includes an administrator terminal 113 and a presence server device 400 instead of the administrator terminal 103 and the presence server device 100. The description of the same configuration and the same processing is omitted.

  In the present embodiment, when the administrator terminal 113 makes a status notification request to the presence server device 400, the administrator terminal 113 does not input from the screen of the presence server device 400, but transmits a SUBSCRIBE message describing the status change condition. It shall be. As an example, the administrator terminal 113 transmits a SUBSCRIBE message describing a state change condition “notify only when the same state continues for 1 minute or longer”, and the presence server device 400 changes the state change described in the received SUBSCRIBE message. A case will be described where conditions are set and state notification is performed only when the state change condition is satisfied.

  First, the message flow of this embodiment will be described with reference to FIG. The office worker terminal 101 and the office worker terminal 102 transmit a PUBLISH message to the presence server device 400 and register the states of the users 121 and 122 in advance. The administrator terminal 113 transmits a SUBSCRIBE message describing the state change condition and the notification destination URI to the presence server device 400. Here, “notify only when the same state continues for one minute or longer” is described as the state change condition, and “sip: 103@example.com”, which is the URI of the administrator terminal 113, is described as the notification destination URI. . When the presence server device 400 receives the SUBSCRIBE message, the presence server device 400 holds the state change condition and the notification destination URI described therein.

  The outside worker terminal 101 and the inside worker terminal 102 transmit a PUBLISH message to the presence server device 400 whenever the states of the users 121 and 122 change, respectively. Upon receiving the PUBLISH message, the presence server device 400 sets a timer for the time described in the state change condition, and transmits a NOTIFY message to the administrator terminal 113 only when the state has not changed after the timer expires.

  First, the configuration of the administrator terminal 113 and the operation executed when the administrator terminal 113 transmits a SUBSCRIBE message will be described with reference to FIGS. 25 and 26. FIG. FIG. 25 is a block diagram showing a configuration of administrator terminal 113 in the present embodiment, and FIG. 26 is a flowchart showing operations executed when administrator terminal 113 in the present embodiment transmits a SUBSCRIBE message. .

  A configuration of the administrator terminal 113 will be described. As shown in FIG. 25, the administrator terminal 113 outputs information to a control unit 401 that controls the operation of all the components constituting the administrator terminal 113 and a screen (not shown) of the administrator terminal 113. Screen output unit 402, input receiving unit 403 for inputting information input from the screen, message generating unit 404 for generating a signal including a notification destination URI and status information, presence server device 400, office worker terminal 101, office worker terminal The communication unit 405 transmits and receives signals to and from an external device such as 102. The screen output unit 402 and the input reception unit 403 may be configured with a touch panel, for example.

  First, the control unit 401 sends a command to display a screen for inputting a state change condition to the screen output unit 402 (S701), and waits for an input from the user 130 (S702). When the state change condition is input from the user 130, the information is sent from the input receiving unit 403 to the control unit 401 (S703). Here, it is assumed that a condition “notify only when the same state continues for one minute or longer” is input as the state change condition.

  The control unit 401 converts the input condition into a state change condition format (S704). Here, it is converted into a state change condition of “Continuing_time> = 1 min”.

  The control unit 401 sends the converted state change condition to the message generation unit 404 (S705), and the message generation unit 404 generates a SUBSCRIBE message describing the state change condition (S706). The message generation unit 404 sends the generated SUBSCRIBE message to the communication unit 405 (S707), and the communication unit 405 transmits the received SUBSCRIBE message to the presence server device 400 (S708). Here, the address of the presence server 400 may be set in the administrator terminal 113 in advance, or may be input from the input screen by the user. Details regarding the data of the SUBSCRIBE message will be described later.

  Next, the configuration of the presence server apparatus 400 and the SUBSCRIBE message receiving operation will be described with reference to FIGS. 27 and 28. FIG. FIG. 27 is a block diagram showing a configuration of presence server apparatus 400 in the present embodiment, and FIG. 28 is a flowchart showing operations executed when presence server apparatus 400 in the present embodiment receives a SUBSCRIBE message. . Since the operation performed after the presence server device 400 receives the PUBLISH message is the same as that in the first embodiment, the description thereof is omitted. The data structures of the state management database 502 and the state change condition holding unit 503 are also the same as those in the first embodiment, and thus the description thereof is omitted.

  First, the configuration of the presence server device 400 will be described. As shown in FIG. 27, the presence server apparatus 400 controls the control unit 501 that controls the operation of all the components constituting the presence server apparatus 400, and the URIs and states of all the devices managed by the presence server apparatus 400. A state management database 502 to be stored, a state change condition holding unit 503 for storing a state change condition and a notification destination URI, a message generation unit 504 for generating a signal including a notification destination URI and state information, an outside worker terminal 101, an in-house employee A communication unit 505 that transmits and receives signals to and from external devices such as the administrator terminal 102 and the administrator terminal 113.

  FIG. 28 is a flowchart showing an operation executed when the presence server apparatus 400 in the present embodiment receives a SUBSCRIBE message.

  First, the communication unit 505 receives a SUBSCRIBE message (S710), and sends the received SUBSCRIBE message to the control unit 501 (S711). The control unit 501 stores the state change condition and the notification destination URI described in the SUBSCRIBE message in the state change condition holding unit 503 (S712). Here, since “Continuing_time> = 1 min” is described as the state change condition, it is saved. As the notification destination URI, the URI described in the Contact header of the SUBSCRIBE message is stored.

  Thereafter, the presence server device 400 may transmit the first NOTIFY message for the SUBSCRIBE message. Since the first NOTIFY message transmission is the same as the normal SIP procedure, description thereof is omitted.

  Next, the SUBSCRIBE message message in this embodiment will be described. The details of the message included in the NOTIFY message are the same as in the first embodiment, and will not be described.

  The SUBSCRIBE message will be described with reference to FIG. FIG. 29 is a diagram showing a data structure of a SUBSCRIBE message transmitted from the administrator terminal 113 to the presence server device 400 in the present embodiment.

  In the Contact header, an arbitrary address (such as anonymous @ anywhere) preset in the administrator terminal 113 is described as a notification destination URI and a Request-URI. In the Event header, “Time-Filter” indicating a filter specifying the time change state of the device is described. State change conditions are described in the body part. The state change condition may be described in the header portion using an extension header.

  In the present embodiment, the communication unit 405 sets state information receiving means for receiving signals indicating the states of the user 121 of the outside worker terminal 101 and the user 122 of the office worker terminal 102 from the presence server device 400, and a state change condition. A change condition transmission unit is configured to transmit the change condition information packet to the presence server apparatus 400.

  The communication unit 505 constitutes a change condition information receiving unit that receives a change condition information packet transmitted from the administrator terminal 113, and the state change condition holding unit 503 is based on the change condition information packet received by the communication unit 505. State change condition setting means for storing the state change condition is configured.

  The state management database 502 stores the state change information of the user 121 and the user 122 based on the state information of the user 121 and the user 122 from the outside worker terminal 101 and the office worker terminal 102 received via the communication unit 505. And constitutes state change information storage means.

  The control unit 501 compares the state change information stored in the state change condition storage unit 503 with the state change information stored in the state change condition holding unit 503 and the state change information of the user 121 of the outside worker terminal 101 and the user 122 of the office worker terminal 102 stored in the state management database 502. In addition, it is determined whether or not the states of the user 121 and the user 122 have changed beyond a predetermined degree, and constitutes a state change determination means.

  Further, the communication unit 505 is configured to transmit a NOTIFY message including state information to the administrator terminal 113 when the control unit 501 determines that the user state has changed beyond a predetermined level. A change notification information transmitting unit is configured.

  As described above, in the present embodiment, the administrator terminal 113 transmits a SUBSCRIBE message describing the state change condition to the presence server apparatus 400, and the presence server apparatus 400 sends a NOTIFY message only when the state change condition is satisfied. An example of sending is shown. As a result, the state change condition can be specified by the administrator terminal 113, a NOTIFY message is transmitted at a more appropriate timing, an unnecessary NOTIFY message is not transmitted, and network resources can be used effectively. The load related to transmission / reception of the NOTIFY message between the presence server device 400 and the administrator terminal 113 is reduced.

In the present embodiment, the presence server device 400 measures the state durations of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102, and is determined to be equal to or longer than the state duration indicated by the state change condition. However, even if the administrator terminal 113 is provided with the function of measuring and determining the state duration time, the user can be notified of the state at a necessary timing. For example, the presence server device 400 transmits a NOTIFY message to the administrator terminal 113 every time the statuses of the users 121 and 122 of the office worker terminal 101 and the office worker terminal 102 change. The administrator terminal 113 measures the state continuation time from the received NOTIFY message, and if it is determined that the state continuation time is greater than or equal to the state continuation time indicated by the state change condition set in advance in the administrator terminal 113, the state for the user By performing the notification, the user can receive a status notification at a necessary timing. In the present embodiment, the users 121 and 122 of the external worker terminal 101 and the internal worker terminal 102 constitute a state issuer, and the change in the state of the users 121 and 122 is the subject of notification. Of course, the office worker terminal 102 constitutes a status issuer, and the status of the outside worker terminal 101 and the office worker terminal 102 itself may be subject to notification, and various people and things may be targeted. .
(Seventh embodiment)

  FIG. 30 is a block diagram illustrating the configuration of the presence server device, administrator terminal, and network system according to the seventh embodiment.

  30, the network system includes an office worker terminal 601, an outside worker terminal 602, and an administrator terminal 603, and the office worker terminal 601, the outside worker terminal 602, and the administrator terminal 603 are connected to each other via a network 610. Yes. The office worker terminal 601 is a device such as a PC that is operated by the user 621, and the worker terminal 602 is a device such as a mobile phone or a PDA that is operated by the user 622. Here, the office worker terminal 601 has a configuration similar to that of the presence server device 400 of the sixth embodiment, and further sets state change information of the office worker terminal 601 itself. That is, the state management database constituting the in-house worker terminal 601 stores the in-house worker terminal 601 itself or the state of the user 621 who operates the in-house worker terminal 601 together with the URIs and states of other devices, and constitutes the in-house worker terminal 601. The state change condition holding unit also saves the state change condition of the in-house worker terminal 601 or the user 621, and the control unit constituting the in-house worker terminal 601 stores the state of the in-house worker terminal 601 itself or the user 621 stored in the state management database. The change information is also compared with the state change condition stored in the state change condition holding unit to determine whether or not the state has changed beyond a predetermined level. The administrator terminal 603 is a device such as a PC that is operated by the user 630. Furthermore, it is assumed that the administrator terminal 603 has the same configuration as the administrator terminal 103 of the sixth embodiment. The administrator terminal 603 desires to notify the status of the users 621 and 622 of the office worker terminal 601 and the outside worker terminal 602, and sends a status notification request to either the office worker terminal 601 or the outside worker terminal 602. Here, for the office worker terminal 601, a state where “the location of the user 622 of the outside worker terminal 602 continues to be in the room for 10 minutes or more and the presence state of the user 621 of the office worker terminal 601 is present State notification request specifying a state change condition of “only when notification continues for 10 minutes or more”, the office worker terminal 601 sends a status notification request to the worker terminal 602 and the user 622 of the worker terminal 602 An example is shown in which a state is acquired and state notification is performed only when the state change condition is satisfied.

  First, the message flow of this embodiment will be described with reference to FIG.

  The administrator terminal 603 transmits a SUBSCRIBE message describing the state change condition to the office worker terminal 601. At this time, the state change condition is as follows: “The location of the user 622 of the outside worker terminal 602 continues to be in the room for 10 minutes or more, and the presence state of the user 621 of the office worker terminal 601 is open for 10 minutes or more. The following message representing the condition “notify only when continuing” is described in the SIP body part.

"Sip: 602@example.com; place =" desk ";Continuing_time> = 10min AND
sip: 601@example.com; presence = "open";Continuing_time> = 10min "

  When the office worker terminal 601 receives the SUBSCRIBE message, the office worker terminal 601 transmits a SUBSCRIBE message to the outside worker terminal 602 for requesting notification of the location state. When the outside worker terminal 602 receives the SUBSCRIBE message, the outside worker terminal 602 transmits a NOTIFY message describing the location state to the inside worker terminal 601. When the office worker terminal 601 receives a NOTIFY message from the outside worker terminal 602 or when the location of the user 621 of the office worker terminal 601 changes, a timer for the time described in the state change condition is set, and the timer When the state of the user 621 has not changed after the completion, the administrator refers to the history of the state of the other device or user described in the state change condition, and only when the state of the other device or user also satisfies the state change condition A NOTIFY message is transmitted to the terminal 603.

  Next, details of the operation of the office worker terminal 601 will be described. As for the configuration of the office worker terminal 601, the status management database constituting the office worker terminal 601 stores the status of the user 621 who operates the office worker terminal 601 itself or the office worker terminal 601 together with the URI and status of other devices. The state change condition holding unit constituting the office worker terminal 601 also saves the state change condition of the office worker terminal 601 itself or the user 621, and the control unit constituting the office worker terminal 601 stores the office work terminal 601 stored in the state management database. The state change information of the person terminal 601 itself or the user 621 is also compared with the state change condition stored in the state change condition holding unit to determine whether or not the state has changed beyond a predetermined level. Except for this point, the present embodiment is the same as the presence server device 400 of the sixth embodiment, and thus the same reference numerals are given and description thereof is omitted. Further, since the configuration and operation of the administrator terminal 603 are the same as those of the administrator terminal 103 of the sixth embodiment, the same reference numerals are given and description thereof is omitted.

  First, operations performed when the office worker terminal 601 receives a SUBSCRIBE message will be described with reference to FIGS. 27 and 32. FIG. FIG. 32 is a flowchart showing an operation executed when the office worker terminal 601 receives a SUBSCRIBE message in the present embodiment.

First, the communication unit 505 receives a SUBSCRIBE message (S801), and sends the received SUBSCRIBE message to the control unit 501 (S802). The control unit 501 stores the state change condition and the notification destination URI described in the SUBSCRIBE message in the state change condition holding unit 503 (S803). Here, it is assumed that the state change condition is described as follows, and the URI of the administrator terminal 603 is described in the Contact header as the notification destination URI.
"Sip: 602@example.com; place =" desk ";Continuing_time> = 10min AND
sip: 601@example.com; presence = "open";Continuing_time> = 10min "

  Thereafter, the URI of the outside worker terminal 602 described in the state change condition and the state change condition are sent to the message generation unit 504 (S804). The message generation unit 504 generates a SUBSCRIBE message in which the received URI is described in the Request-URI (S805), and sends it to the communication unit 505 (S806). The communication unit 505 transmits a SUBSCRIBE message to the office worker terminal 602 (S807) and waits for reception of a NOTIFY message for the SUBSCRIBE message (S808).

  When the communication unit 505 receives the NOTIFY message from the outside worker terminal 602 (S809), the communication unit 505 sends the received NOTIFY message to the control unit 501 (S810). The control unit 501 saves the state described in the NOTIFY message in the state management database 502 (S811). Thereafter, the outside worker terminal 602 may transmit the first NOTIFY message for the SUBSCRIBE message.

  Next, operations performed when the office worker terminal 601 transmits a NOTIFY message will be described with reference to FIGS. 27 and 33. FIG. FIG. 33 is a flowchart showing an operation executed when the office worker terminal 601 transmits a NOTIFY message in the present embodiment.

  The communication unit 505 first receives the NOTIFY message from the outside worker terminal 602 or waits for the status of the inside worker terminal 601 itself to change (S901), receives the NOTIFY message from the outside worker terminal 602, When the state of the worker terminal 601 changes (S902), the state described in the received NOTIFY message or the changed state of the office worker terminal 601 itself is stored in the state management database 502 (S903). Here, the steps from S904 to S914 are the same as the steps from S604 to S614 in the sixth embodiment, and thus description thereof is omitted.

  The steps from S904 to S914 are also executed when the status of the office worker terminal 601 itself changes and the status stored in the status management database 502 is changed, and a NOTIFY message is generated as necessary.

  As described above, in this embodiment, the administrator terminal 603 transmits a SUBSCRIBE message describing the state change condition to the office worker terminal 601, and the office worker terminal 601 acquires the state described in the state change condition. In order to do this, an example is shown in which a SUBSCRIBE message is transmitted to the external worker terminal 602 to acquire the state, and a NOTIFY message is transmitted only when the state change condition is satisfied. As a result, even when there is no presence server device, the state change condition can be specified, network resources can be used effectively, and the load related to sending / receiving NOTIFY messages between the office worker terminal 601 and the administrator terminal 603 is reduced. . Further, by adopting the configuration as in the present embodiment, there is no need for server maintenance.

  In this embodiment, the office worker terminal 601 that executes the function of the presence server device holds the state change history and the state duration of the office worker terminal 601 and the outside worker terminal 602, which satisfy the state change condition. In this case, the NOTIFY message is transmitted to the administrator terminal 603. However, even if the administrator terminal 603 has the functions of maintaining the state change history and the state duration and determining the state change condition, the user can It is possible to notify the status at the required timing. For example, the office worker terminal 601 that executes the function of the presence server device transmits a NOTIFY message to the manager terminal 603 every time the status of the office worker terminal 601 and the outside worker terminal 602 change. The administrator terminal 603 holds the state change history and state duration of the received NOTIFY message, and when it is determined that the state change condition preset in the administrator terminal 603 is satisfied, the administrator terminal 603 gives the user 630 By notifying the status, the user 630 can receive the status notification at a necessary timing. In the present embodiment, the users 621 and 622 of the office worker terminal 601 and the outside worker terminal 602 constitute a status issuer, and the change of the state of the users 621 and 622 is targeted for notification. Needless to say, the worker terminal 602 constitutes a state issuer, and the state of various people and things may be the subject of notification, for example, a change in the state of the office worker terminal 601 or the outside worker terminal 602 itself. .

  As described above, the notification device, the notified device, and the notification method according to the present invention can effectively use network resources by reducing unnecessary notifications when notifying the state of a device connected to the network. It has the effect of reducing the processing load on the presence server, and is useful as a server load reduction method in a presence service, a device, or a user status management service.

1 is a block diagram illustrating a configuration of a network system to which a notification device and a notified device according to a first embodiment are applied. The sequence diagram which shows the message flow of the network system shown in FIG. The block diagram which shows the structure of the presence server apparatus in 1st Embodiment The flowchart which shows the operation | movement performed when the presence server apparatus in 1st Embodiment sets a state change condition The flowchart which shows the operation | movement which the presence server apparatus in 1st Embodiment performs after receiving a PUBLISH message The block diagram which shows the structure of the administrator terminal 103 in 1st Embodiment The flowchart which shows the operation | movement which the administrator terminal 103 in 1st Embodiment performs after reception of a NOTIFY message The block diagram which shows the data structure of the NOTIFY message transmitted to the administrator terminal 103 from the presence server 100 apparatus in 1st Embodiment The block diagram which shows the structure of the data preserve | saved in the state management database 202 of the presence server apparatus 100 in 1st Embodiment The block diagram which shows the structure of the data preserve | saved with the state change condition holding | maintenance part 203 of the presence server apparatus 100 in 1st Embodiment The sequence diagram which shows the message flow of the network system in 2nd Embodiment The flowchart which shows the operation | movement which the presence server apparatus 100 in 2nd Embodiment performs after receiving a PUBLISH message The block diagram which shows the data structure of the NOTIFY message transmitted to the administrator terminal 103 from the presence server apparatus 100 in 2nd Embodiment The block diagram which shows the structure of the data preserve | saved in the state management database 202 of the presence server apparatus 100 in 2nd Embodiment The sequence diagram which shows the message flow of the network system in 3rd Embodiment The flowchart which shows the operation | movement which the presence server apparatus 100 in 3rd Embodiment performs after receiving a PUBLISH message The sequence diagram which shows the message flow of the network system in 4th Embodiment The flowchart which shows the operation | movement which the presence server apparatus 100 in 4th Embodiment performs after receiving a PUBLISH message The block diagram which shows the data structure of the NOTIFY message transmitted to the administrator terminal 103 from the presence server apparatus 100 in 4th Embodiment The block diagram which shows the structure of the data preserve | saved in the state management database 202 of the presence server apparatus 100 in 4th Embodiment The sequence diagram which shows the message flow of the network system in 5th Embodiment The flowchart which shows the operation | movement which the presence server apparatus 100 in 5th Embodiment performs after receiving a PUBLISH message The block diagram which shows the data structure of the NOTIFY message transmitted to the administrator terminal 103 from the presence server apparatus 100 in 5th Embodiment The sequence diagram which shows the message flow of the network system in 6th Embodiment The block diagram which shows the structure of the administrator terminal 113 in 6th Embodiment The flowchart which shows the operation | movement performed when the administrator terminal 113 in 6th Embodiment transmits a SUBSCRIBE message A block diagram showing a configuration of a presence server device 400 according to a sixth embodiment The flowchart which shows the operation | movement performed when the presence server apparatus 400 in 6th Embodiment receives a SUBSCRIBE message The figure which shows the data structure of the SUBSCRIBE message transmitted to the presence server apparatus 400 from the administrator terminal 113 in 6th Embodiment. The block diagram which shows the structure of the network system to which the notification apparatus and notified apparatus of 7th Embodiment are applied The sequence diagram which shows the message flow of the network system in 7th Embodiment The flowchart which shows the operation | movement performed when the office worker terminal 601 in 7th Embodiment receives a SUBSCRIBE message The flowchart which shows the operation | movement performed when the office worker terminal 601 in 7th Embodiment transmits a NOTIFY message. The figure which shows an example of the network structure in the presence service using the conventional SIP event notification function The figure which shows an example of the message flow in the presence service based on the conventional SIP protocol A diagram showing an example of a message flow of a conventional event filter

Explanation of symbols

100, 400, 700 Presence server device 101, 602 Office worker terminal 102, 601 Office worker terminal 103, 113, 603 Administrator terminal 701, 702, 703, 704 Personal computer 110, 610, 710 Network (LAN)
121, 122, 130, 621, 622, 630 User 201 Presence server device control unit 202 Presence server device state management database 203 Presence server device state change condition holding unit 204 Presence server device message generation unit 205 Presence server device Communication unit 206 Screen output unit of presence server device
207 Presence server input receiving unit 301 Administrator terminal control unit 302 Administrator terminal screen output unit 303 Administrator terminal communication unit 401 Administrator terminal control unit 402 Administrator terminal screen output unit 403 Administrator terminal screen Input reception unit 404 Message generation unit 405 of the administrator terminal Communication unit 501 of the administrator terminal Control unit 502 of the presence server device State management database 503 of the presence server device State change condition holding unit 504 of the presence server device Message generation of the presence server device 505 Communication unit of presence server device

Claims (9)

Receiving means for receiving a status registration message indicating the status of the issuer from at least one issuer;
State change information storage means for storing the state registration message together with time information ;
Based on the status registration message stored in the status change information storage means, its time information, and a preset status change condition, the status has changed due to the time information between the status registration messages from the same issuer . State change determination means for determining whether or not,
If it is determined that the state of the issuer is changed by the state change determining means that the state notification message notifying the state of the issuer and a status change information transmitting means for transmitting to the notification device A presence server device . The state change condition includes a state duration, a state change time range, a state item representing the state of at least one of the issuers, a state value of the state item, or a combination thereof. The presence server device according to claim 1. The presence server apparatus according to claim 2, wherein the state registration message includes the state item and its state value. The presence server apparatus according to claim 1, wherein the status notification message includes status information corresponding to the status change condition and a time related to the status. State change condition setting means for setting the state change condition;
Change condition information receiving means for receiving a change condition information message indicating the state change condition from the notified device, wherein the state change condition setting means receives the change condition information message received by the change condition information receiving means. The presence server apparatus according to claim 1, wherein the state change condition is set based on the presence server condition. The presence server apparatus according to claim 4, wherein the state change notification information transmitting unit and the change condition information receiving unit transmit or receive each message in accordance with a SIP (Session Initiation Protocol) protocol. Receiving a status registration message indicating the status of the issuer from at least one issuer;
Storing the status registration message with time information;
Based on the stored state registration message, its time information, and a state change condition set in advance, it is determined whether or not the state has changed according to the time information between the state registration messages from the same issuer. Steps,
Transmitting a status notification message notifying the status of the issuer to the notified device when it is determined that the status of the issuer has changed;
A presence server communication method characterized by comprising: In a notified device that receives a status notification message that notifies the status of the issuer from a presence server device that registers a registration notification message indicating the status of at least one issuer via a network,
Message generating means for generating a change condition information message indicating a state change condition;
Change condition transmitting means for transmitting the generated change condition information message to the presence server device;
As a response to the change condition information message, based on the status information of the issuer, the time information received from the status notification, and the change condition information, the issue information is obtained based on time information between registration notification messages from the same issuer. State information receiving means for receiving the state notification message notified from the presence server device that has determined that the state of the body has changed ;
A device to be notified. The change condition information message includes a state duration, a state change time range, a state item indicating the state of at least one issuer and a state value of the state item, or a combination thereof. The notified device according to claim 8.

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