Patent Publication Number: US-2023142199-A1

Title: Monitoring camera video sharing system and monitoring camera video sharing method

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2021-181104 filed on Nov. 5, 2021, the contents of which are incorporated herein by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to a monitoring camera video sharing system and a monitoring camera video sharing method. 
     BACKGROUND ART 
     Patent Literature 1 discloses a system including a monitoring camera that communicates with an external terminal, and an image management server that communicates with the external terminal and the monitoring camera. When image data of a monitoring camera belonging to a group to which the monitoring camera belongs is requested from the external terminal, the image management server transmits, to the external terminal, an electronic file that includes connection information for acquiring the image data of the monitoring camera belonging to the group. The connection information is, for example, link information such as a uniform resource locator (URL) of the image data. 
     CITATION LIST 
     Patent Literature 
     
         
         Patent Literature 1: JP2016-116125A 
       
    
     SUMMARY OF INVENTION 
     In a configuration described in Patent Literature 1, if the external terminal requests image data from a monitoring camera belonging to a group and does not acquire connection information (in other words, information of a right to acquire image data of another monitoring camera belonging to the group) to be acquired in response to the request, the external terminal cannot acquire image data of a series of monitoring cameras belonging to the group. Therefore, in an environment in which a plurality of monitoring cameras are disposed, a problem arises that not only corresponding connection information is required in order to acquire image data of each of the monitoring cameras, but also an administrator side makes a mistake in setting when setting a right for each monitoring camera. Therefore, it is difficult to efficiently share, with the external terminal, the image data of the monitoring camera belonging to the group, and there is room for improvement. 
     The present disclosure has been made in view of the above circumstances in the related art, and an object of the present disclosure is to provide a monitoring camera video sharing system and a monitoring camera video sharing method that improve efficiency of data sharing of a video of at least one monitoring camera. 
     The present disclosure provides a monitoring camera video sharing system including: one or more user terminals configured to enable viewing of video data of each of a plurality of monitoring cameras disposed in a target facility; and a server configured to store access permission data that includes at least first user information and monitoring camera information. The first user information includes an access right to the video data of each of the monitoring cameras, and the monitoring camera information indicates information of at least one selected monitoring camera selected by an operation of the user terminal based on the first user information. The server is configured to update the access permission data by adding an access right to the video data of the selected monitoring camera to second user information based on sharing processing of the access permission data to the second user information, and set the video data of the selected monitoring camera linked to the access permission data and specified by the monitoring camera information such that the video data of the selected monitoring camera is accessible by the user terminal based on the second user information. The sharing processing is performed by the operation of the user terminal based on the first user information. 
     The present disclosure also provides a monitoring camera video sharing method including: storing, in a server, access permission data that includes at least first user information and monitoring camera information, the first user information including an access right to video data of each of a plurality of monitoring cameras disposed in a target facility, and the monitoring camera information indicating information of at least one selected monitoring camera selected by an operation of a user terminal based on the first user information; updating the access permission data by adding an access right to the video data of the selected monitoring camera to second user information based on sharing processing of the access permission data to the second user information, the sharing processing being performed by the operation of the user terminal based on the first user information; and setting the video data of the selected monitoring camera linked to the access permission data and specified by the monitoring camera information such that the video data of the selected monitoring camera is accessible by the user terminal based on the second user information. 
     These comprehensive or specific aspects may be implemented by a system, a device, a method, an integrated circuit, a computer program, or a recording medium, or may be implemented by any combination of the system, the device, the method, the integrated circuit, the computer program, and the recording medium. 
     According to the present disclosure, it is possible to improve efficiency of data sharing of a video of at least one monitoring camera. 
     Further advantages and effects of an aspect of the present disclosure will become apparent from the description and the drawings. These advantages and/or effects are respectively provided by features described in several embodiments, the description, and the drawings, and it is not necessary to provide all of the advantages and/or effects in order to obtain one or more identical features. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a diagram showing a system configuration example of a monitoring camera system. 
         FIG.  2    is a block diagram showing hardware configuration examples of a device management server, a DB server, and a user management server. 
         FIG.  3    is a diagram showing an operation outline according to a first operation example. 
         FIG.  4    is a diagram showing an example of transition of a screen displayed on a terminal of each of users U 1  and U 2  according to the first operation example. 
         FIG.  5    is a sequence diagram showing, in time series, an operation procedure of creation processing of favorite data according to the first operation example. 
         FIG.  6    is a sequence diagram showing, in time series, an operation procedure of sharing processing of the favorite data according to the first operation example. 
         FIG.  7    is a diagram showing an operation outline according to a second operation example. 
         FIG.  8    is a diagram showing an example of transition of a screen displayed on the terminal of each of the users U 1  and U 2  according to the second operation example. 
         FIG.  9    is a sequence diagram showing, in time series, an operation procedure of creation processing of favorite data according to the second operation example. 
         FIG.  10    is a sequence diagram showing, in time series, an operation procedure of sharing processing of the favorite data according to the second operation example. 
         FIG.  11    is a diagram showing an operation outline according to a third operation example. 
         FIG.  12    is a diagram showing an example of transition of a screen displayed on the terminal of each of the users U 1  and U 2  according to the third operation example. 
         FIG.  13    is a sequence diagram showing, in time series, an operation procedure of sharing processing of favorite data according to the third operation example. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, embodiments in which a monitoring camera video sharing system and a monitoring camera video sharing method according to the present disclosure are specifically disclosed will be described in detail with reference to the drawings as appropriate. However, unnecessarily detailed description may be omitted. For example, detailed description of a well-known matter or a repeated description of substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding for those skilled in the art. The accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matters described in the claims. 
     System Configuration Example 
       FIG.  1    is a diagram showing a system configuration example of a monitoring camera system  100 . As shown in  FIG.  1   , the monitoring camera system  100  (an example of a monitoring camera video sharing system) includes at least a client terminal PC 1  (an example of a first user terminal), a DB server S 1  (an example of a server), a device management server S 2  (an example of the server), and a user management server S 3  (an example of the server). The DB server S 1 , the device management server S 2 , and the user management server S 3  are not necessarily required individually, and one or more servers having functions of the respective servers may be included. 
     The monitoring camera system  100  may further include a mobile terminal TB 1  (an example of a second user terminal) and a distribution control server S 4 . Each of the client terminal PC 1  and the mobile terminal TB 1  is connected to each of the DB server S 1 , the device management server S 2 , the user management server S 3 , and the distribution control server S 4  via a network NW 2  so that data communication can be performed therebetween. 
     The monitoring camera system  100  may further include monitoring cameras Ca 1 , Ca 2 , . . . , and a recorder RD which are disposed in a target facility (for example, a store A), and monitoring cameras Cb 1 , Cb 2 , . . . which are disposed in a target facility (for example, a store B). Each of the monitoring cameras Ca 1 , Ca 2 , . . . , the recorder RD, and the monitoring cameras Cb 1  and Cb 2  is connected to the distribution control server S 4  via a network NW 1  so that data communication can be performed therebetween. 
     Each of the networks NW 1  and NW 2  is, for example, a wireless network conforming to any one of a wireless local area network (LAN) such as Wi-Fi (registered trademark), a cellular mobile communication scheme such as 4G or 5G, Bluetooth (registered trademark), and Wireless Gigabit (WiGig), but may not be limited thereto. Each of the networks NW 1  and NW 2  may be a wired network such as a universal serial bus (USB) cable or a wired LAN. In the following description, video data captured by each of the monitoring cameras Ca 1 , Ca 2 , Cb 1 , Cb 2 , . . . includes not only the video data but also identification information of the monitoring camera that captures the video data and imaging date and time information. 
     The monitoring camera system  100  enables remote viewing (for example, viewing and listening to or playing back. The same shall apply hereinafter.) of the video data from at least one of the client terminal PC 1  and the mobile terminal TB 1  for monitoring purposes, and the video data is captured by each of the monitoring cameras Ca 1  and Ca 2  which are disposed in the target facility (for example, the store A). Similarly, the monitoring camera system  100  enables remote viewing of the video data from at least one of the client terminal PC 1  and the mobile terminal TB 1  for monitoring purposes, and the video data is captured by each of the monitoring cameras Cb 1  and Cb 2  disposed in the target facility (for example, the store B). An example of the target facility includes a store, but a facility (for example, a shopping mall and an office building) other than the store, or a plurality of stores may be regarded as one facility. 
     Further, when a sharing operation of favorite data (an example of access permission data) of a monitoring camera to another user (for example, a user U 2 ) is performed by the client terminal PC 1  used by a user U 1 , the monitoring camera system  100  executes sharing processing of performing setting based on the sharing operation such that the mobile terminal TB 1  designated in the sharing operation can access video data of the monitoring camera specified by the favorite data. Details of the sharing processing will be described later with reference to  FIG.  3    and subsequent accompanying drawings. 
     Each of the monitoring cameras Ca 1 , Ca 2 , . . . is disposed so as to be able to capture an image of an area to be monitored in the store A, and captures video data in which a subject (for example, a person existing in the store A, or an area to be focused on in the store A) is imaged. The captured video data may be recorded in a memory (not illustrated) in each of the monitoring cameras Ca 1 , Ca 2 , . . . , and may be transmitted to and stored in the recorder RD or directly transmitted to the distribution control server S 4  via the network NW 1 . The subject may be an element other than the person and the area described above, and the same shall apply hereinafter. 
     The recorder RD may include a storage (not illustrated), receive, from each of the monitoring cameras Ca 1 , Ca 2 , . . . , the video data of the subject captured by a respective one of the monitoring cameras Ca 1 , Ca 2 , . . . which are disposed in the store A so as to store the video data in the storage (see the above description), and intermittently or periodically transmit the video data to the distribution control server S 4 . 
     Each of the monitoring cameras Cb 1 , Cb 2 , . . . is disposed so as to be able to capture an image of an area to be monitored in the store B, and captures video data in which a subject (for example, a person existing in the store B, or an area to be focused on in the store B) is imaged. The captured video data may be recorded in a memory (not illustrated) in each of the monitoring cameras Cb 1 , Cb 2 , . . . , and may be directly transmitted to the distribution control server S 4  via the network NW 1 . In order to simplify illustration in  FIG.  1   , a configuration in which the store B does not include the recorder RD is illustrated, but the store B may include the recorder RD. 
     The client terminal PC 1  is, for example, a personal computer, and is used by the user U 1 . The client terminal PC 1  performs data communication with each of the DB server S 1 , the device management server S 2 , the user management server S 3 , and the distribution control server S 4  via the network NW 2 . In the following description, the user U 1  is a person who performs the sharing operation of the favorite data of the monitoring camera, and is a person who has an access right to the video data of the monitoring camera specified by the favorite data. The client terminal PC 1  transmits a request for the sharing processing of the favorite data of the monitoring camera to the device management server S 2  or the user management server S 3  by an operation performed by the user U 1 . 
     The mobile terminal TB 1  is, for example, a mobile phone, a smartphone, or a tablet terminal, and is used by the user U 2 . The mobile terminal TB 1  performs data communication with each of the DB server S 1 , the device management server S 2 , the user management server S 3 , and the distribution control server S 4  via the network NW 2 . In the following description, the user U 2  is a person for whom the sharing operation of the favorite data of the monitoring camera is performed, and is a person who can have, only by the sharing operation performed by the user U 1 , the access right to the video data of the monitoring camera specified by the favorite data of the user U 1 . The mobile terminal TB 1  can access, by the sharing processing (see later description) based on the operation performed by the user U 1 , the video data of the monitoring camera specified by the favorite data of the monitoring camera. 
     The DB server S 1  is implemented by, for example, a server computer, and includes a database DB that stores data of various types of setting information for each device (for example, a monitoring camera and a recorder) to be monitored by the monitoring camera system  100 , and data of various types of setting information for each user who is registered to be able to use the monitoring camera system  100  (see  FIG.  2   ). The DB server S 1  refers to the database DB, and responds with data in response to a request from the device management server S 2  or the user management server S 3 . The various types of setting information for each device are, for example, a name and an identification number of the device, a date and time when disposition (in other words, attachment) in the target facility is completed, a name of the target facility (for example, the store A) in which the device is disposed, and information of a license (for example, a license expiration date) indicating a use right for remote viewing or the like, but may not be limited thereto. The various types of setting information for each user are, for example, a name of the user, a login identification (ID) and a password which are required to be input when the user uses (in other words, logs into) the monitoring camera system  100 , an expiration date of the login ID and the password, and a right of the user (for example, a right of a store manager having the same right as that of a responsible person, a right of a store clerk having the same right as that of a general user, or an access right to video data of a monitoring camera which is provided for each monitoring camera), but may not be limited thereto. A detailed hardware configuration example of the DB server S 1  will be described later with reference to  FIG.  2   . 
     The device management server S 2  is implemented by, for example, a server computer, and executes processing of handling the various types of setting information for each device to be monitored by the monitoring camera system  100  or favorite data by data communication with the DB server S 1 . For example, when the device management server S 2  receives the favorite data (see later description) from the client terminal PC 1  or the mobile terminal TB 1 , the device management server S 2  adds the favorite data to the DB server S 1 , or instructs the DB server S 1  to change (for example, add, change, or delete) data of setting information of the monitoring camera linked to (in other words, corresponding to) the favorite data (hereinafter, referred to as “favorite linked camera data”). The DB server S 1  changes the corresponding favorite linked camera data based on the instruction. Further, the device management server S 2  requests the DB server S 1  to update the favorite linked camera data, based on an operation of the client terminal PC 1  or the mobile terminal TB 1 . Further, the device management server S 2  requests and acquires camera data specified by the favorite linked camera data (that is, the data of the setting information of the monitoring camera linked to the favorite data) from the DB server S 1  based on an operation of the client terminal PC 1  or the mobile terminal TB 1 . A detailed hardware configuration example of the device management server S 2  will be described later with reference to  FIG.  2   . 
     The user management server S 3  is implemented by, for example, a server computer, and executes processing of handling the various types of setting information for each user who is registered to be able to use the monitoring camera system  100  or favorite data by data communication with the DB server S 1 . For example, when the user management server S 3  receives, from the client terminal PC 1  or the mobile terminal TB 1 , a request for a change (for example, addition, change, or deletion) of data of setting information of a user who can access the favorite data (see later description) (hereinafter, referred to as “favorite access user data”), the user management server S 3  instructs the DB server S 1  to change the favorite access user data, based on the request. The DB server S 1  changes the corresponding favorite access user data based on the instruction. When the user management server S 3  receives a request for a change (for example, addition, change, or deletion) of data of setting information of a user who can access a monitoring camera (hereinafter, referred to as “camera access user data”) linked to the favorite data, the user management server S 3  instructs the DB server S 1  to change the camera access user data, based on the request. The DB server S 1  changes the corresponding camera access user data based on the instruction. Similarly to the device management server S 2 , when the user management server S 3  receives the favorite data (see later description) from the client terminal PC 1  or the mobile terminal TB 1 , the user management server S 3  may add the favorite data to the DB server S 1 . A detailed hardware configuration example of the user management server S 3  will be described later with reference to  FIG.  2   . 
     The distribution control server S 4  is implemented by, for example, a server computer, acquires, from the DB server S 1 , information of a license of each device (for example, the monitoring camera and the recorder) to be monitored by the monitoring camera system  100  so as to refer to the information, and determines whether viewing on the client terminal PC 1  or the mobile terminal TB 1  is permitted. When it is determined that the license of the device (for example, the monitoring camera Ca 1 ) to be determined is valid (that is, before a license expiration date elapses), the distribution control server S 4  determines that the viewing, on the client terminal PC 1  or the mobile terminal TB 1 , of the video data captured by the monitoring camera Ca 1  is permitted. On the other hand, when it is determined that the license of the device (for example, the monitoring camera Ca 1 ) to be determined is invalid (that is, after the license expiration date elapses) and the license is not updated, the distribution control server S 4  determines that viewing, on the client terminal PC 1  or the mobile terminal TB 1 , of the video data captured by the monitoring camera Ca 1  is prohibited. 
     Hardware Configuration Example 
       FIG.  2    is a block diagram showing the hardware configuration examples of the device management server S 2 , the DB server S 1 , and the user management server S 3 . Except that the DB server S 1  includes a database DB 1 , the device management server S 2 , the DB server S 1 , and the user management server S 3  have the same hardware configuration. Instead of providing the DB server S 1 , each of other servers (that is, the device management server S 2  and the user management server S 3 ) may hold the database DB 1 , and may have a function and data for managing the held database DB 1 . The device management server S 2 , the DB server S 1 , and the user management server S 3  are connected to each other by using, for example, a wired network such as a wired LAN, so as to enable data communication with each other. 
     The DB server S 1  includes a communication device  21 , a processor  22 , a memory  23 , and the database DB 1 . In the accompanying drawings, an interface is simply referred to as “IF” for convenience. 
     The communication device  21  performs data communication (that is, transmission and reception of data) with the device management server S 2  or the user management server S 3  connected via the above wired network (for example, the wired LAN) or the like. When the communication device  21  receives a request from the device management server S 2  or the user management server S 3 , the communication device  21  returns an acknowledge (hereinafter, abbreviated as “Ack”) that the processor  22  has executed to the device management server S 2  or the user management server S 3  based on the request. Processing of storing or reading data may be directly executed between the communication device  21  and the memory  23  without via the processor  22 . 
     The processor  22  is implemented by, for example, a central processing unit (CPU), a digital signal processor (DSP), a graphical processing unit (GPU), or a field programmable gate array (FPGA). The processor  22  functions as a controller that controls an overall operation of the DB server S 1 , and performs control processing of controlling an operation of each unit of the DB server S 1 , input and output processing of data to and from each unit of the DB server S 1 , calculation processing of data, and storage processing of data. The processor  22  operates in accordance with a program and data stored in the memory  23 . The processor  22  uses the memory  23  during an operation to temporarily store, in the memory  23 , data or information (including Ack) created or acquired by the processor  22 , or transmits the data or the information to the communication device  21 . A specific example of processing performed by the processor  22  will be described with reference to  FIG.  3    and the subsequent accompanying drawings. 
     The memory  23  is implemented by, for example, a random access memory (RAM) and a read only memory (ROM), and temporarily stores a program necessary for executing an operation of the DB server S 1 , and data or information created during the operation. The RAM is a work memory used during the operation of the DB server S 1 . The ROM stores and saves a program and data for controlling the DB server S 1  in advance. 
     The database DB 1  is implemented by a storage medium (for example, a flash memory, a hard disk drive (HDD), or a solid state drive (SSD)). The database DB 1  stores the data of the various types of setting information for each device (for example, the monitoring camera and the recorder) to be monitored by the monitoring camera system  100  (see the above description), the data of the various types of setting information for each user who is registered to be able to use the monitoring camera system  100  (see the above description), and various types of data related to the favorite data. 
     The various types of data related to the favorite data are, for example, the favorite data, the favorite linked camera data, the favorite access user data, and the camera access user data. 
     The favorite data is data including at least one of the favorite linked camera data, the favorite access user data, and the camera access user data. More specifically, the favorite data is data that includes setting information of the target facility (for example, the store) selected as a remote monitoring target by a user of the monitoring camera system  100  (in other words, the user who can access the favorite data), the setting information of the device (for example, the monitoring camera) disposed in the target facility (see the above description), and the setting information of the user who can access the favorite data (see the above description). 
     The favorite linked camera data is data constituting the favorite data, and is the data of the setting information of the monitoring camera (see the above description) to be viewed for monitoring by access to the favorite data. For example, when the user U 1  creates the favorite data such that the favorite data includes setting information of each of the monitoring cameras Ca 1  and Ca 2  in the store A (see  FIG.  3   ), the favorite linked camera data constituting the favorite data is the setting information (for example, a name) of each of the monitoring cameras Ca 1  and Ca 2 . 
     The favorite access user data is data constituting the favorite data, and is the data of the setting information of the user who can access the favorite data (see the above description). For example, when the user U 1  creates the favorite data so as to be able to access the favorite data (see step St 1  in  FIG.  3   ), the favorite access user data constituting the favorite data is setting information (for example, a name) of the user U 1 . Further, when the user U 1  performs the sharing operation of the favorite data so that the user U 2  can also access the favorite data (see step St 2  in  FIG.  3   ), the favorite access user data constituting the favorite data is setting information (for example, a name) of each of the users U 1  and U 2 . 
     The camera access user data is data constituting the favorite data, and is the data of the setting information of the user who can access the video data of the monitoring camera specified by the favorite linked camera data (see the above description). For example, when the user U 1  performs an operation such that the user U 2  can newly access the video data of the monitoring camera specified by the favorite linked camera data (see step St 2  in  FIG.  3   ), the DB server S 1  creates the camera access user data including the setting information of the monitoring camera and the setting information of the new user U 2 . 
     The device management server S 2  includes a communication device  31 , a processor  32 , and a memory  33 . 
     The communication device  31  performs data communication (that is, transmission and reception of data) with the DB server S 1  connected via the above wired network (for example, the wired LAN) or the like. The communication device  31  performs data communication with the client terminal PC 1  or the mobile terminal TB 1  connected via the network NW 2 . When the communication device  31  receives a request from the client terminal PC 1  or the mobile terminal TB 1 , the communication device  31  returns an acknowledge (Ack) that the processor  32  has executed with the DB server S 1  to the client terminal PC 1  or the mobile terminal TB 1  based on the request. Processing of storing or reading data may be directly executed between the communication device  31  and the memory  33  without via the processor  32 . 
     The processor  32  is implemented by, for example, a CPU, a DSP, a GPU, or an FPGA. The processor  32  functions as a controller that controls an overall operation of the device management server S 2 , and performs control processing of controlling an operation of each unit of the device management server S 2 , input and output processing of data to and from each unit of the device management server S 2 , calculation processing of data, and storage processing of data. The processor  32  operates in accordance with a program and data stored in the memory  33 . The processor  32  uses the memory  33  during an operation to temporarily store, in the memory  33 , data or information (including Ack) created or acquired by the processor  32 , or transmits the data or the information to the communication device  31 . A specific example of processing performed by the processor  32  will be described with reference to  FIG.  3    and the subsequent accompanying drawings. 
     The memory  33  is implemented by, for example, a RAM and a ROM, and temporarily stores a program necessary for executing an operation of the device management server S 2 , and data or information created during the operation. The RAM is a work memory used during the operation of the device management server S 2 . The ROM stores and saves a program and data for controlling the device management server S 2  in advance. 
     The user management server S 3  includes a communication device  41 , a processor  42 , and a memory  43 . 
     The communication device  41  performs data communication (that is, transmission and reception of data) with the DB server S 1  connected via the above wired network (for example, the wired LAN) or the like. The communication device  41  performs data communication with the client terminal PC 1  or the mobile terminal TB 1  connected via the network NW 2 . When the communication device  41  receives a request from the client terminal PC 1  or the mobile terminal TB 1 , the communication device  41  returns an acknowledge (Ack) that the processor  42  has executed with the DB server S 1  to the client terminal PC 1  or the mobile terminal TB 1  based on the request. Processing of storing or reading data may be directly executed between the communication device  41  and the memory  43  without via the processor  42 . 
     The processor  42  is implemented by, for example, a CPU, a DSP, a GPU, or an FPGA. The processor  42  functions as a controller that controls an overall operation of the user management server S 3 , and performs control processing of controlling an operation of each unit of the user management server S 3 , input and output processing of data to and from each unit of the user management server S 3 , calculation processing of data, and storage processing of data. The processor  42  operates in accordance with a program and data stored in the memory  43 . The processor  42  uses the memory  43  during an operation to temporarily store, in the memory  43 , data or information (including Ack) created or acquired by the processor  42 , or transmits the data or the information to the communication device  41 . A specific example of processing performed by the processor  42  will be described with reference to  FIG.  3    and the subsequent accompanying drawings. 
     The memory  43  is implemented by, for example, a RAM and a ROM, and temporarily stores a program necessary for executing an operation of the user management server S 3 , and data or information created during the operation. The RAM is a work memory used during the operation of the user management server S 3 . The ROM stores and saves a program and data for controlling the user management server S 3  in advance. 
     First Operation Example 
     Next, an outline of a first operation example of sharing processing of favorite data of the monitoring camera system  100  according to a first embodiment will be described with reference to  FIG.  3   .  FIG.  3    is a diagram showing an operation outline according to the first operation example. In the first operation example, favorite data Dt 1  is data common to the users U 1  and U 2  of the monitoring camera system  100 , and is not provided separately for each user. 
     As shown in  FIG.  3   , an example will be described in which, for example, the user U 1  is registered in advance as a user of the monitoring camera system  100 , and the user U 2  newly registered as a user of the monitoring camera system  100  is set to be able to access the monitoring cameras Ca 1  and Ca 2  in the store A linked to the favorite data Dt 1  created by the user U 1 . 
     (St 1 ) The user U 1  is set to be able to remotely view video data of each of monitoring cameras (for example, four monitoring cameras Ca 1 , Ca 2 , Ca 3 , and Ca 4 ) disposed in the store A. That is, setting information (for example, a right) of the user U 1  includes a right to access the video data of each of the monitoring cameras Ca 1 , Ca 2 , Ca 3 , and Ca 4  disposed in the store A, the client terminal PC 1  used by the user U 1  is an example of a user terminal which is permitted to log into the monitoring camera system  100  as the user U 1  by the setting information (for example, a login ID and a password) of the user U 1 , and the same shall apply hereinafter. The client terminal PC 1  creates, by an operation performed by the user U 1 , the favorite data Dt 1  including data of the setting information of each of the monitoring cameras Ca 1  and Ca 2  in the store A. The favorite data Dt 1  is data that acts as a right to access the video data of each of the monitoring cameras Ca 1  and Ca 2  (an example of a selected monitoring camera) in the store A selected by the user U 1 . Creation of the favorite data Dt 1  has been described here, and the client terminal PC 1  can also edit or delete the favorite data Dt 1  by an operation performed by the user U 1 . 
     (St 2 ) The client terminal PC 1  executes, by the sharing operation performed by the user U 1 , the sharing processing of sharing the favorite data Dt 1  created in step St 1  to the user U 2 . The mobile terminal TB 1  used by the user U 2  is an example which is permitted to log into the monitoring camera system  100  as the user U 2  by setting information (for example, a login ID and a password) of the user U 2 , and the same shall apply hereinafter. As a result, the mobile terminal TB 1  used by the user U 2  can acquire the favorite data Dt 1 , can access the video data of each of the monitoring cameras Ca 1  and Ca 2  in the store A specified by the favorite data Dt 1 , and enables remote viewing. 
     (St 3 ) The user U 2  is set to be able to remotely view the video data of each of the monitoring cameras Ca 1  and Ca 2  disposed in the store A by sharing the favorite data Dt 1 . The mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) can edit or delete the favorite data Dt 1  by an operation performed by the user U 2 . 
       FIG.  4    is a diagram showing an example of transition of a screen displayed on a terminal of each of the users U 1  and U 2  according to the first operation example. In  FIG.  4   , the monitoring camera is simply abbreviated as a camera. 
     In an initial state Cn 11  of the client terminal PC 1  corresponding to step St 1  in  FIG.  3   , the client terminal PC 1  which is used by the user U 1  (that is, which is permitted to log in as the user U 1  based on the setting information of the user U 1 ) displays, on a camera list screen WD 1 , thumbnails Thm 1 , Thm 2 , Thm 3 , and Thm 4  each indicating that the video data of a respective one of the monitoring cameras Ca 1 , Ca 2 , Ca 3 , and Ca 4  disposed in the store A can be remotely viewed. Further, in response to the creation of the favorite data Dt 1 , the client terminal PC 1  displays, on a favorite screen WD 2 , thumbnails Thm 1   f  and Thm 2   f  each indicating contents of the favorite data Dt 1  (for example, indicating that the video data of a respective one of the monitoring cameras Ca 1  and Ca 2  disposed in the store A can be remotely viewed). 
     On the other hand, in an initial state Cn 21  of the mobile terminal TB 1  corresponding to step St 1  in  FIG.  3   , since it is before the sharing processing of the favorite data Dt 1  is executed and no monitoring camera accessible by the mobile terminal TB 1  is set, the mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) displays a camera list screen WD 3  and a favorite screen WD 4  on each of which no thumbnail of a monitoring camera is displayed. 
     For example, it is assumed that correspondingly to step St 2  in  FIG.  3   , the user U 1  performs the sharing operation of sharing the favorite data Dt 1  to the user U 2  (St 11 ). 
     In a state Cn 22  of the mobile terminal TB 1 , the mobile terminal TB 1  can access the favorite data Dt 1  (in other words, access the video data of each of the monitoring cameras Ca 1  and Ca 2  disposed in the store A) by the sharing processing (see  FIG.  6   ) based on the sharing operation of the favorite data Dt 1  in step St 11 . Therefore, the mobile terminal TB 1  displays and updates, on the camera list screen WD 3 , the thumbnails Thm 1  and Thm 2  each indicating that the video data of a respective one of the monitoring cameras Ca 1  and Ca 2  disposed in the store A can be remotely viewed. Further, the mobile terminal TB 1  displays and updates, on the favorite screen WD 4 , the thumbnails Thm 1   f  and Thm 2   f  each indicating the contents of the favorite data Dt 1  (for example, indicating that the video data of a respective one of the monitoring cameras Ca 1  and Ca 2  disposed in the store A can be remotely viewed). 
     For example, it is assumed that correspondingly to step St 3  in  FIG.  3   , the user U 2  performs an editing operation of the favorite data Dt 1  (for example, a deletion operation of the monitoring camera Ca 2 ) (St 12 ). Deletion of the monitoring camera Ca 2  corresponds to, for example, deletion of data of the setting information of the monitoring camera Ca 2  in the favorite linked camera data constituting the favorite data Dt 1 . 
     In a state Cn 23  of the mobile terminal TB 1 , the mobile terminal TB 1  deletes the thumbnail Thm 2   f  on the favorite screen WD 4  by the editing operation of the favorite data Dt 1  in step St 12 , thereby displaying and updating the favorite screen WD 4 . By the displaying and updating, only the thumbnail Thm 1   f  of the monitoring camera Ca 1  is displayed on the favorite screen WD 4 . Further, the mobile terminal TB 1  transmits, to the device management server S 2 , a notification (deletion notification) that the monitoring camera Ca 2  in the favorite data Dt 1  is deleted in step St 12  (St 13 ). When the device management server S 2  receives the deletion notification, the device management server S 2  transfers the deletion notification to the client terminal PC 1 , and transmits, to the DB server S 1 , an instruction to delete the data of the setting information of the monitoring camera Ca 2  from the favorite linked camera data constituting the favorite data Dt 1 . The DB server S 1  deletes, based on the instruction from the device management server S 2 , the data of the setting information of the monitoring camera Ca 2  from the favorite linked camera data constituting the favorite data Dt 1 . 
     In a state Cn 12  of the client terminal PC 1 , when the client terminal PC 1  receives the deletion notification from the device management server S 2 , the client terminal PC 1  displays and updates the favorite screen WD 2  by deleting the thumbnail Thm 2   f  on the favorite screen WD 2  in the initial state Cn 11 . 
       FIG.  5    is a sequence diagram showing, in time series, an operation procedure of creation processing of the favorite data according to the first operation example.  FIG.  6    is a sequence diagram showing, in time series, an operation procedure of the sharing processing of the favorite data according to the first operation example. In description of  FIGS.  5  and  6   , processing performed by each server is mainly executed by a processor included in the server. In the description of  FIG.  6   , the same processing as those in the description of  FIG.  5    are denoted by the same step numbers, description thereof will be simplified or omitted, and different contents will be described. 
     In  FIG.  5   , by an operation performed by the user U 1 , the client terminal PC 1  displays a favorite screen (St 21 ), and selects the monitoring cameras Ca 1  and Ca 2  disposed in the store A so as to create the favorite data that acts as the right to access the video data of each of the selected monitoring cameras Ca 1  and Ca 2  (St 22 ). The client terminal PC 1  requests the device management server S 2  to add the favorite data of the store A created in step St 22  (St 23 ). In accordance with the request in step St 23 , the device management server S 2  instructs the DB server S 1  to add the favorite data of the store A created in step St 22  (St 24 ). In accordance with the instruction, the DB server S 1  adds the favorite data of the store A to the database DB 1 . Ack that addition of the favorite data of the store A to the database DB 1  is completed is returned to the device management server S 2 . 
     Based on reception of the Ack from the DB server S 1 , the device management server S 2  instructs the DB server S 1  to add the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2  to the favorite linked camera data constituting the favorite data of the store A (St 25 ). In accordance with the instruction, the DB server S 1  adds, to the database DB 1 , favorite linked camera data Dt 2  to which the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2  is added, in order to constitute (create) the favorite data of the store A. Ack that addition of the favorite linked camera data Dt 2  to the database DB 1  is completed is returned to the device management server S 2  and the client terminal PC 1 . 
     Based on reception of the Ack from the DB server S 1 , the client terminal PC 1  requests the user management server S 3  to add data of the setting information of the user U 1  to the favorite access user data constituting the favorite data of the store A (St 26 ). In accordance with the request in step St 26 , the user management server S 3  instructs the DB server S 1  to add the data of the setting information of the user U 1  to the favorite access user data constituting the favorite data of the store A (St 27 ). In accordance with the instruction, the DB server S 1  adds, to the database DB 1 , favorite access user data Dt 3  to which the data of the setting information of the user U 1  is added, in order to constitute the favorite data of the store A. Ack that addition of the favorite access user data Dt 3  to the database DB 1  is completed is returned to the user management server S 3  and the client terminal PC 1 . As a result, the client terminal PC 1  completes registration, in the database DB 1 , of the favorite data that acts as the right to access the video data of each of the monitoring cameras Ca 1  and Ca 2  disposed in the store A. 
     In  FIG.  6   , by the operation performed by the user U 1 , the client terminal PC 1  executes the sharing operation on the favorite screen (see  FIG.  5   ) displayed in step St 21  (St 31 ), and the sharing operation is to share, to the user U 2 , the favorite data that acts as the right to access the video data of each of the monitoring cameras Ca 1  and Ca 2  disposed in the store A. The client terminal PC 1  requests the device management server S 2  to acquire device data (that is, the data of the setting information of the device) linked to the favorite data which is a target of the sharing operation executed in step St 31  (St 32 ). In accordance with the request in step St 32 , the device management server S 2  instructs the DB server S 1  to request the favorite linked camera data constituting the favorite data which is the target of the sharing operation (St 33 ). In accordance with the instruction, the DB server S 1  returns, to the device management server S 2 , the favorite linked camera data (that is, the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2 ) constituting the favorite data of the store A (St 34 ). Ack that returning of the favorite linked camera data (that is, the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2 ) constituting the favorite data of the store A is completed is returned to the client terminal PC 1 . 
     Based on reception of the Ack from the device management server S 2 , the client terminal PC 1  requests the user management server S 3  to add an access right of a user (specifically, the user U 2 ) to the favorite data of the store A (St 35 ). In accordance with the request in step St 35 , the user management server S 3  instructs the DB server S 1  to add data of the setting information of the user U 2  to the camera access user data indicating that the user U 2  has an access right to the video data of each of all the monitoring cameras Ca 1  and Ca 2  registered in the favorite data of the store A (St 36 ). In accordance with the instruction, the DB server S 1  adds, to the database DB 1 , camera access user data Dt 4  to which the data of the setting information of the user U 2  is added, in order to constitute the favorite data of the store A. Ack that addition of the camera access user data Dt 4  to the database DB 1  is completed is returned to the user management server S 3 , and the camera access user data Dt 4  indicates that the user U 2  has the right to access the video data of each of the monitoring cameras Ca 1  and Ca 2 . Further, in response to reception of the Ack from the DB server S 1 , the user management server S 3  instructs the DB server S 1  to add the data of the setting information of the user U 2  to the favorite access user data constituting the favorite data of the store A (St 37 ). In accordance with the instruction, the DB server S 1  adds, to the database DB 1 , favorite access user data Dt 5  to which the data of the setting information of the user U 2  is added, in order to constitute the favorite data of the store A. Ack that addition of the favorite access user data Dt 5  to the database DB 1  is completed is returned to the user management server S 3  and the client terminal PC 1 . As a result, by the sharing operation performed by the client terminal PC 1  which is used by the user U 1  (that is, which is permitted to log in as the user U 1  based on the setting information of the user U 1 ), the mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) is set to be able to access the video data of each of the monitoring cameras Ca 1  and Ca 2  disposed in the store A, so that these pieces of video data can be viewed remotely. 
     Second Operation Example 
     Next, an outline of a second operation example of sharing processing of favorite data of the monitoring camera system  100  according to the first embodiment will be described with reference to  FIG.  7   .  FIG.  7    is a diagram showing an operation outline according to the second operation example. In the second operation example, favorite data Dt 1   a  and Dt 1   a ( 1 ) are data which are created individually for the users U 1  and U 2  of the monitoring camera system  100 , respectively. 
     As shown in  FIG.  7   , an example will be described in which, for example, the user U 1  is registered in advance as the user of the monitoring camera system  100 , and the user U 2  newly registered as the user of the monitoring camera system  100  is set to be able to access the monitoring cameras Ca 1  and Ca 2  in the store A linked to the favorite data Dt 1   a  created by the user U 1 . 
     (St 1   a ) The user U 1  is set to be able to remotely view the video data of each of the monitoring cameras (for example, the four monitoring cameras Ca 1 , Ca 2 , Ca 3 , and Ca 4 ) disposed in the store A. The client terminal PC 1  which is used by the user U 1  (that is, which is permitted to log in as the user U 1  based on the setting information of the user U 1 ) creates, by an operation performed by the user U 1 , the favorite data Dt 1   a  including the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2  in the store A. The favorite data Dt 1   a  is data that acts as a right to access the video data of each of the monitoring cameras Ca 1  and Ca 2  (the example of the selected monitoring camera) in the store A selected by the user U 1 . Creation of the favorite data Dt 1   a  has been described here, and the client terminal PC 1  can also edit or delete the favorite data Dt 1   a  by an operation performed by the user U 1 . 
     (St 2   a ) The client terminal PC 1  executes, by the sharing operation performed by the user U 1 , the sharing processing of sharing the favorite data Dt 1  a created in step St 1   a  to the user U 2 . As a result, the mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) can acquire the favorite data Dt 1   a ( 1 ) that is data substantially the same as the favorite data Dt 1   a , can access the video data of each of the monitoring cameras Ca 1  and Ca 2  in the store A specified by the favorite data Dt 1   a ( 1 ), and enables remote viewing. 
     (St 3   a ) The user U 2  is set to be able to remotely view the video data of each of the monitoring cameras Ca 1  and Ca 2  disposed in the store A by acquiring the favorite data Dt 1   a ( 1 ). The mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) can independently edit or delete the favorite data Dt 1   a ( 1 ) regardless of the favorite data Dt 1   a  of the user U 1  by an operation performed by the user U 2 . 
       FIG.  8    is a diagram showing an example of transition of a screen displayed on the terminal of each of the users U 1  and U 2  according to the second operation example. In  FIG.  8   , the monitoring camera is simply abbreviated as the camera. In description of  FIG.  8   , the same elements as those in  FIG.  4    are denoted by the same reference numerals, description thereof will be simplified or omitted, and different contents will be described. 
     In the initial state Cn 11  of the client terminal PC 1  corresponding to step St 1   a  in  FIG.  7   , the client terminal PC 1  which is used by the user U 1  (that is, which is permitted to log in as the user U 1  based on the setting information of the user U 1 ) displays, on the camera list screen WD 1 , the thumbnails Thm 1 , Thm 2 , Thm 3 , and Thm 4  each indicating that the video data of a respective one of the monitoring cameras Ca 1 , Ca 2 , Ca 3 , and Ca 4  disposed in the store A can be remotely viewed. Further, in response to the creation of the favorite data Dt 1   a , the client terminal PC 1  displays, on the favorite screen WD 2 , the thumbnails Thm 1   f  and Thm 2   f  each indicating contents of the favorite data Dt 1   a  (for example, indicating that the video data of a respective one of the monitoring cameras Ca 1  and Ca 2  disposed in the store A can be remotely viewed). 
     On the other hand, in the initial state Cn 21  of the mobile terminal TB 1  corresponding to step St 1   a  in  FIG.  7   , since it is before the sharing processing of the favorite data Dt 1   a  is executed and no monitoring camera accessible by the mobile terminal TB 1  is set, the mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) displays the camera list screen WD 3  and the favorite screen WD 4  on each of which no thumbnail of the monitoring camera is displayed. 
     For example, it is assumed that correspondingly to step St 2   a  in  FIG.  7   , the user U 1  performs the sharing operation of sharing the favorite data Dt 1   a  to the user U 2  (St 11 ). 
     In the state Cn 22  of the mobile terminal TB 1 , by the sharing processing (see  FIG.  10   ) based on the sharing operation of the favorite data Dt 1   a  in step St 11 , the mobile terminal TB 1  acquires the favorite data Dt 1   a ( 1 ) that is the data substantially the same as the favorite data Dt 1   a , and can access the favorite data Dt 1   a ( 1 ) (in other words, access the video data of each of the monitoring cameras Ca 1  and Ca 2  disposed in the store A). Therefore, the mobile terminal TB 1  displays and updates, on a camera list screen WD 3   a , thumbnails Thm 1   a  and Thm 2   a  each indicating that the video data of a respective one of the monitoring cameras Ca 1  and Ca 2  disposed in the store A can be remotely viewed. Further, the mobile terminal TB 1  displays and updates, on a favorite screen WD 4   a , thumbnails Thm 1   fa  and Thm 2   fa  each indicating contents of the favorite data Dt 1   a ( 1 ) (for example, indicating that the video data of a respective one of the monitoring cameras Ca 1  and Ca 2  disposed in the store A can be remotely viewed). 
     For example, it is assumed that correspondingly to step St 3   a  in  FIG.  7   , the user U 2  performs an editing operation of the favorite data Dt 1   a ( 1 ) (for example, the deletion operation of the monitoring camera Ca 2 ) (St 12 ). Deletion of the monitoring camera Ca 2  corresponds to, for example, deletion of the data of the setting information of the monitoring camera Ca 2  in the favorite linked camera data constituting the favorite data Dt 1   a ( 1 ). 
     In the state Cn 23  of the mobile terminal TB 1 , the mobile terminal TB 1  deletes the thumbnail Thm 2   fa  on the favorite screen WD 4   a  by the editing operation of the favorite data Dt 1   a ( 1 ) in step St 12 , thereby displaying and updating the favorite screen WD 4   a . By the displaying and updating, only the thumbnail Thm 1   fa  of the monitoring camera Ca 1  is displayed on the favorite screen WD 4   a . Further, the mobile terminal TB 1  transmits, to the device management server S 2 , a notification (deletion notification) that the monitoring camera Ca 2  in the favorite data Dt 1   a ( 1 ) is deleted in step St 12  (St 13 ). When the device management server S 2  receives the deletion notification, the device management server S 2  transfers the deletion notification to the client terminal PC 1 , and transmits, to the DB server S 1 , an instruction to delete the data of the setting information of the monitoring camera Ca 2  from the favorite linked camera data constituting the favorite data Dt 1   a ( 1 ). The DB server S 1  deletes, based on the instruction from the device management server S 2 , the data of the setting information of the monitoring camera Ca 2  from the favorite linked camera data constituting the favorite data Dt 1   a ( 1 ). 
     In the state Cn 12  of the client terminal PC 1 , even when the client terminal PC 1  receives the deletion notification from the device management server S 2 , the client terminal PC 1  continues to display the same favorite screen WD 2  as the favorite screen WD 2  in the initial state Cn 11  without updating display on the favorite screen WD 2  in the initial state Cn 11 . It is because, in the second operation example as described above, the favorite data Dt 1   a  of the user U 1  and the favorite data Dt 1   a ( 1 ) of the user U 2  are separately created so that editing of one favorite data does not affect contents of the other favorite data. 
       FIG.  9    is a sequence diagram showing, in time series, an operation procedure of creation processing of the favorite data according to the second operation example.  FIG.  10    is a sequence diagram showing, in time series, an operation procedure of the sharing processing of the favorite data according to the second operation example. In description of  FIGS.  9  and  10   , processing performed by each server is mainly executed by the processor included in the server. In the description of  FIGS.  9  and  10   , the same processing as those in the description of  FIG.  5    are denoted by the same step numbers, description thereof will be simplified or omitted, and different contents will be described. 
     In  FIG.  9   , the client terminal PC 1  requests the user management server S 3  to add the favorite data of the store A created by the user U 1  in step St 22  (St 41 ). In accordance with the request in step St 41 , the user management server S 3  instructs the DB server S 1  to add the favorite data of the store A created by the user U 1  in step St 22  (St 42 ). In accordance with the instruction, the DB server S 1  adds, to the database DB 1 , the favorite data Dt 1   a  of the store A created by the user U 1 . Ack that addition of the favorite data of the store A created by the user U 1  to the database DB 1  is completed is returned to the user management server S 3  and the client terminal PC 1 . 
     Based on reception of the Ack from the DB server S 1 , the client terminal PC 1  requests the device management server S 2  to add the favorite linked camera data constituting the favorite data of the store A created by the user U 1  (St 43 ). The request includes the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2  specified by the favorite data Dt 1   a  of the store A. In accordance with the request in step St 43 , the device management server S 2  instructs the DB server S 1  to add the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2  to the favorite linked camera data constituting the favorite data of the store A created by the user U 1  (St 25 ). In accordance with the instruction, the DB server S 1  adds, to the database DB 1 , favorite linked camera data Dt 2   a  to which the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2  included in the request in step St 43  is added, in order to constitute (create) the favorite data of the store A. Ack that addition of the favorite linked camera data Dt 2   a  to the database DB 1  is completed is returned to the device management server S 2  and the client terminal PC 1 . As a result, the client terminal PC 1  completes registration, in the database DB 1 , of the favorite data of the user U 1  that acts as the right to access the video data of each of the monitoring cameras Ca 1  and Ca 2  disposed in the store A. 
     In  FIG.  10   , the client terminal PC 1  requests the device management server S 2  to add favorite data that is data substantially the same as the favorite data which is created by the user U 1  and which is the target of the sharing operation executed in step St 31  (St 51 ). The request includes data of various types of setting information constituting the favorite data Dt 1   a  of the store A. In accordance with the request in step St 51 , the device management server S 2  instructs the DB server S 1  to request the favorite linked camera data constituting the favorite data which is created by the user U 1  and which is a sharing source (St 52 ). In accordance with the instruction, the DB server S 1  returns, to the device management server S 2 , the favorite linked camera data (that is, the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2 ) constituting the favorite data created by the user U 1  (St 53 ). Ack that returning of the favorite linked camera data (that is, the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2 ) constituting the favorite data created by the user U 1  is completed is returned to the client terminal PC 1 . 
     Based on reception of the Ack from the device management server S 2 , the client terminal PC 1  requests the user management server S 3  to add the favorite data of the store A created by the user U 2 , and to grant the access right to the video data of each of all the monitoring cameras Ca 1  and Ca 2  registered in the favorite data which is created by the user U 1  and which is the sharing source (St 54 ), and the favorite data of the store A is data substantially the same as the favorite data which is created by the user U 1  and which is the sharing source. In accordance with the request in step St 54 , the user management server S 3  instructs the DB server S 1  to add the favorite data of the store A created by the user U 2  (St 55 ). In accordance with the instruction, the DB server S 1  adds, to the database DB 1 , the favorite data Dt 1   a ( 1 ) of the store A created by the user U 2 . Ack that addition, to the database DB 1 , of the favorite data Dt 1   a ( 1 ) of the store A created by the user U 2  is completed is returned from the DB server S 1  to the user management server S 3 . 
     Based on reception of the Ack from the DB server S 1 , the user management server S 3  instructs the DB server S 1  to add the data of the setting information of the user U 2  to the camera access user data (St 56 ) in order to constitute the favorite data Dt 1   a ( 1 ) of the store A created by the user U 2 , and the camera access user data indicates that the access right to the video data of each of the monitoring cameras Ca 1  and Ca 2  is granted to the user U 2 . In accordance with the instruction, the DB server S 1  adds, to the database DB 1 , camera access user data Dt 4   a  to which the data of the setting information of the user U 2  is added, in order to constitute the favorite data Dt 1   a ( 1 ) of the store A created by the user U 2 . Ack that addition of the camera access user data Dt 4   a  to the database DB 1  is completed is returned to the user management server S 3  and the client terminal PC 1 , and the camera access user data Dt 4   a  indicates that the user U 2  has the right to access the video data of each of the monitoring cameras Ca 1  and Ca 2 . 
     Further, based on reception of the Ack from the user management server S 3 , the client terminal PC 1  requests the device management server S 2  to update the favorite linked camera data constituting the favorite data Dt 1   a (i) of the store A created by the user U 2  (St 57 ). In accordance with the request in step St 57 , the device management server S 2  instructs the DB server S 1  to add the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2  to the favorite linked camera data constituting the favorite data Dt 1   a ( 1 ) of the store A created by the user U 2  (St 58 ). In accordance with the instruction, the DB server S 1  adds, to the database DB 1 , the favorite linked camera data Dt 2   a  to which the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2  is added, in order to constitute the favorite data Dt 1   a ( 1 ) of the store A created by the user U 2 . Ack that addition of the favorite linked camera data Dt 2   a  to the database DB 1  is completed is returned to the device management server S 2  and the client terminal PC 1 . As a result, by the sharing operation performed by the client terminal PC 1  which is used by the user U 1  (that is, which is permitted to log in as the user U 1  based on the setting information of the user U 1 ), the mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) can create the favorite data Dt 1   a ( 1 ) for the user U 2  separate from the favorite data Dt 1   a  created by the user U 1 , and is set to be able to access the video data of each of the monitoring cameras Ca 1  and Ca 2  disposed in the store Aby the favorite data Dt 1   a ( 1 ), so that these pieces of video data can be viewed remotely. 
     Third Operation Example 
     Next, an outline of a third operation example of sharing processing of favorite data of the monitoring camera system  100  according to the first embodiment will be described with reference to  FIG.  11   .  FIG.  11    is a diagram showing an operation outline according to the third operation example. In the third operation example, similarly to the second operation example, the favorite data Dt 1   a  is data individually created for the user U 1  of the monitoring camera system  100 . 
     As shown in  FIG.  11   , an example will be described in which, for example, the user U 1  is registered in advance as the user of the monitoring camera system  100 , and the user U 2  newly registered as the user of the monitoring camera system  100  is set to be able to access the monitoring cameras Ca 1  and Ca 2  linked to the favorite data Dt 1   a  created by the user U 1 . That is, in the third operation example, the favorite data is not created by the user U 2 , and the data of the setting information of the monitoring camera linked to the favorite data Dt 1   a  created by the user U 1  and the data of the setting information of the user U 2  who can access the video data of the monitoring camera are registered in the database DB 1 . 
     (St 1 ) The user U 1  is set to be able to remotely view the video data of each of the monitoring cameras (for example, the four monitoring cameras Ca 1 , Ca 2 , Ca 3 , and Ca 4 ) disposed in the store A. The client terminal PC 1  which is used by the user U 1  (that is, which is permitted to log in as the user U 1  based on the setting information of the user U 1 ) creates, by the operation performed by the user U 1 , the favorite data Dt 1   a  including the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2  in the store A. The favorite data Dt 1   a  is the data that acts as the right to access the video data of each of the monitoring cameras Ca 1  and Ca 2  in the store A selected by the user U 1 . The creation of the favorite data Dt 1   a  has been described here, and the client terminal PC 1  can also edit or delete the favorite data Dt 1   a  by the operation performed by the user U 1 . 
     (St 2 ) The client terminal PC 1  executes, by the sharing operation performed by the user U 1 , the sharing processing of sharing the favorite data Dt 1   a  created in step St 1  to the user U 2 . As a result, the mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) can access the video data of each of the monitoring cameras Ca 1  and Ca 2  linked to the favorite data Dt 1   a  created by the user U 1 , and enables remote viewing. 
     (St 3 ) The user U 2  is set to be able to remotely view the video data of each of the monitoring cameras Ca 1  and Ca 2  by the sharing operation in step St 2 . The mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) enables remote viewing of the video data of each of the monitoring cameras Ca 1  and Ca 2  by an operation performed by the user U 2 . However, in the third operation example, since data of setting information of the store A is not added to the favorite data created by the user U 2  as described above, the mobile terminal TB 1  enables only remote viewing of the video data of each of the monitoring cameras Ca 1  and Ca 2 . 
       FIG.  12    is a diagram showing an example of transition of a screen displayed on the terminal of each of the users U 1  and U 2  according to the third operation example. In  FIG.  12   , the monitoring camera is simply abbreviated as the camera. In description of  FIG.  12   , the same elements as those in  FIG.  4    are denoted by the same reference numerals, description thereof will be simplified or omitted, and different contents will be described. 
     In the initial state Cn 11  of the client terminal PC 1  corresponding to step St 1  in  FIG.  11   , the client terminal PC 1  which is used by the user U 1  (that is, which is permitted to log in as the user U 1  based on the setting information of the user U 1 ) displays, on the camera list screen WD 1 , the thumbnails Thm 1 , Thm 2 , Thm 3 , and Thm 4  each indicating that the video data of a respective one of the monitoring cameras Ca 1 , Ca 2 , Ca 3 , and Ca 4  disposed in the store A can be remotely viewed. Further, in response to the creation of the favorite data Dt 1   a , the client terminal PC 1  displays, on the favorite screen WD 2 , the thumbnails Thm 1   f  and Thm 2   f  each indicating contents of the favorite data Dt 1   a  (for example, indicating that the video data of a respective one of the monitoring cameras Ca 1  and Ca 2  disposed in the store A can be remotely viewed). 
     On the other hand, in the initial state Cn 21  of the mobile terminal TB 1  corresponding to step St 1  in  FIG.  11   , since it is before the sharing processing of the favorite data Dt 1   a  is executed and no monitoring camera accessible by the mobile terminal TB 1  is set, the mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) displays the camera list screen WD 3  and the favorite screen WD 4  on each of which no thumbnail of the monitoring camera is displayed. 
     For example, it is assumed that correspondingly to step St 2  in  FIG.  11   , the user U 1  performs the sharing operation of sharing the favorite data Dt 1   a  to the user U 2  (St 11 ). 
     By the operation in step St 11 , the data of the setting information of the monitoring camera linked to the favorite data Dt 1   a  created by the user U 1 , and the data of the setting information of the user U 2  who can access the video data of the monitoring camera are registered in the database DB 1 . Therefore, in the state Cn 22  of the mobile terminal TB 1 , the mobile terminal TB 1  cannot acquire the favorite data such as the favorite data Dt 1   a  of the store A created by the user U 1 , and can access only the video data of each of the monitoring cameras Ca 1  and Ca 2 . Therefore, the mobile terminal TB 1  displays and updates, on the camera list screen WD 3   a , the thumbnails Thm 1   a  and Thm 2   a  each indicating that the video data of a respective one of the monitoring cameras Ca 1  and Ca 2  can be remotely viewed, but does not update display on the favorite screen WD 4 . 
     For example, it is assumed that the favorite data for enabling access to video data of a monitoring camera Cc 1  disposed in a store C created by the user U 2  is created by an operation performed by the user U 2  (St 14 ). 
     In the state Cn 23  of the mobile terminal TB 1 , the mobile terminal TB 1  displays and updates the thumbnail Thm 3  indicating contents of the favorite data (for example, indicating that the video data of the monitoring camera Cc 1  disposed in the store C can be remotely viewed) on the favorite screen WD 4   a  by a creation operation of the favorite data in step St 14 . In addition, the mobile terminal TB 1  transmits, to the user management server S 3 , a notification (store C creation notification) indicating that the creation of the favorite data in step St 14  is performed (see St 15  in  FIG.  12   ). The user management server S 3  performs the same processing as processing shown in  FIG.  9   , and instructs the DB server S 1  to add the favorite data created in step St 14 . Based on the instruction from the user management server S 3 , the DB server S 1  adds data of setting information of the monitoring camera Cc 1  to the favorite linked camera data constituting the favorite data. Ack that the favorite data created by the user U 2  is added to the DB server S 1  is returned to the mobile terminal TB 1 . The Ack may also be transferred to the other client terminal PC 1 . 
     In the state Cn 12  of the client terminal PC 1 , even when the client terminal PC 1  receives Ack that the favorite data created by the user U 2  is added to the DB server S 1 , the client terminal PC 1  continues to display the same favorite screen WD 2  as the favorite screen WD 2  in the initial state Cn 11  without updating the display on the favorite screen WD 2  in the initial state Cn 11 . It is because, in the third operation example as described above, the favorite data Dt 1   a  of the user U 1  and the favorite data of the user U 2  are separately created as in the second operation example so that editing of one favorite data does not affect contents of the other favorite data. 
       FIG.  13    is a sequence diagram showing, in time series, an operation procedure of the sharing processing of the favorite data according to the third operation example. In description of  FIG.  13   , processing performed by each server is mainly executed by the processor included in the server. In the description of  FIG.  13   , the same processing as those in the description of  FIG.  5    are denoted by the same step numbers, description thereof will be simplified or omitted, and different contents will be described. 
     In  FIG.  13   , based on reception of Ack from the device management server S 2 , the client terminal PC 1  requests the user management server S 3  to grant the access right to the video data of each of all the monitoring cameras Ca 1  and Ca 2  registered in the favorite data created by the user U 1  (St 54   b ). In accordance with the request in step St 54   b , the user management server S 3  instructs the DB server S 1  to add the data of the setting information of the user U 2  to camera access user data Dt 4   b  for enabling access to the video data of each of the monitoring cameras Ca 1  and Ca 2  (St 56   b ). In accordance with the instruction, the DB server S 1  adds the data of the setting information of the user U 2  in the camera access user data Dt 4   b  to the database DB 1 . Ack that addition of the data of the setting information of the user U 2  in the camera access user data Dt 4   b  to the database DB 1  is completed is returned from the DB server S 1  to the user management server S 3  and the client terminal PC 1 . As a result, by the sharing operation performed by the client terminal PC 1  which is used by the user U 1  (that is, which is permitted to log in as the user U 1  based on the setting information of the user U 1 ), the mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ) cannot create the favorite data for the user U 2  separate from the favorite data Dt 1   a  created by the user U 1 , but is set to be able to access the video data of each of the monitoring cameras Ca 1  and Ca 2  registered in the favorite data Dt 1   a , so that these pieces of video data can be viewed remotely. 
     As described above, the monitoring camera system  100  according to the first embodiment includes: one or more user terminals configured to enable viewing of video data of each of a plurality of monitoring cameras disposed in a target facility; and a server configured to store access permission data that includes at least first user information and monitoring camera information. The first user information includes an access right to the video data of each of the monitoring cameras, and the monitoring camera information indicates information of at least one selected monitoring camera selected by an operation of the user terminal based on the first user information. The first user information is, for example, setting information (for example, a right of a user) for permitting the user U 1  to log in as the user of the monitoring camera system  100 . The user terminal based on the first user information is, for example, the client terminal PC 1  which is used by the user U 1  (that is, which is permitted to log in as the user U 1  based on the setting information of the user U 1 ). The target facility is, for example, the store. The selected monitoring cameras are, for example, the monitoring cameras Ca 1  and Ca 2 . The monitoring camera information is, for example, the data of the setting information of each of the monitoring cameras Ca 1  and Ca 2 . The access permission data is, for example, the favorite data. The server is, for example, the DB server S 1 , the device management server S 2 , and the user management server S 3 . The server is configured to update the access permission data by adding an access right to the video data of the selected monitoring camera to second user information based on sharing processing of the access permission data to the second user information, and set the video data of the selected monitoring camera linked to the access permission data and specified by the monitoring camera information such that the video data of the selected monitoring camera is accessible by the user terminal based on the second user information. The sharing processing is performed by the operation of the user terminal based on the first user information. The second user information is, for example, setting information (for example, a right of a user) for permitting the user U 2  to log in as the user of the monitoring camera system  100 . The user terminal based on the second user information is, for example, the mobile terminal TB 1  which is used by the user U 2  (that is, which is permitted to log in as the user U 2  based on the setting information of the user U 2 ). 
     As a result, by the sharing operation of the favorite data of the at least one monitoring camera selected by the user terminal based on the first user information, the monitoring camera system  100  can easily perform data sharing, to the user terminal based on the second user information, of the video data of the at least one monitoring camera specified by the favorite data, and can improve efficiency of data sharing. 
     The access permission data further includes facility information (for example, information of the store A) indicating information of the target facility in which the selected monitoring camera is disposed. As a result, the favorite data includes the data of the setting information of the store A selected by the user terminal based on the first user information (for example, the client terminal PC 1 ), so that it is possible to simplify confirmation of where the monitoring camera including the video data is located. 
     The access permission data is a single piece of data that is sharable by the user terminal based on the first user information and the user terminal based on the second user information. As a result, an operation of editing, adding, and deleting the contents of the favorite data by one user terminal affects use of the other user terminal, and convenience can be improved. 
     The server is configured to, after the sharing processing of the access permission data, cause a display screen to be displayed in the same screen layout on a user terminal based on the first user information and a user terminal based on the second user information. The display screen includes the video data of the selected monitoring camera linked to the access permission data and specified by the monitoring camera information, and the information of the target facility. As a result, in a form in which a preference of one user who creates the favorite data is reflected, the other user who receives the shared favorite data can view the video data of the selected monitoring camera in a screen form of the same layout. 
     The server is configured to, based on deletion processing of some selected monitoring cameras among the selected monitoring cameras linked to the access permission data and specified by the monitoring camera information, set only video data of a selected monitoring camera left after the deletion processing such that only the video data of the selected monitoring camera is accessible by each of the user terminal based on the first user information and the user terminal based on the second user information, and the deletion processing is performed by the user terminal based on the second user information. As a result, for example, the data of the setting information of the selected monitoring camera for which remote monitoring by both users is not required can be easily deleted from the favorite data by the deletion processing performed by the user terminal based on the first user information or the user terminal based on the second user information, so that maintenance of the favorite data is expected to be easy. 
     The access permission data includes first access permission data and second access permission data. The first access permission data is provided to enable at least one of creation, editing, and access performed by only a user terminal based on the first user information, and the second access permission data is provided to enable at least one of creation, editing, and access performed by only a user terminal based on the second user information. The first access permission data is the favorite data of the user U 1  created by the user U 1 . Similarly, the second access permission data is the favorite data of the user U 2  created by the user U 2 . As a result, creation, editing, or access of the favorite data is individually set for each user, so that it is possible to operate the favorite data with high degree of freedom in a form in which the preference for each user is reflected. 
     The server is configured to, after sharing processing of the first access permission data, create and store the second access permission data which is a copy of the first access permission data. As a result, the user U 2  can easily share the favorite data having the same contents as those of the favorite data of the user U 1 . 
     The server is configured to, after sharing processing of the first access permission data, cause a first display screen to be displayed on the user terminal based on the first user information, and cause a second display screen to be displayed on the user terminal based on the second user information. The first display screen includes the video data of the selected monitoring camera linked to the first access permission data and specified by the monitoring camera information, and information of the target facility. The second display screen includes the video data of the selected monitoring camera linked to the second access permission data and specified by the monitoring camera information, and the information of the target facility. The first display screen and the second display screen are formed to have the same layout. The first display screen is, for example, the favorite screen WD 2   a  of the client terminal PC 1 . The second display screen is, for example, the favorite screen WD 4   a  of the mobile terminal TB 1 . As a result, the favorite data are stored in the database DB 1  so as to be different for each user, and in the form in which the preference, for the display screen layout, of one user who creates the favorite data is reflected, the other user who receives the shared favorite data can view the video data of the selected monitoring camerain a screen form of the same display screen layout. 
     The server is configured to, based on deletion processing of some selected monitoring cameras among the selected monitoring cameras linked to the second access permission data and specified by the monitoring camera information, set video data of a selected monitoring camera left after the deletion processing such that only the video data of the selected monitoring camera is accessible by the user terminal based on the second user information, and set the video data of the selected monitoring camera specified by the first access permission data and not subject to the deletion processing such that the video data of the selected monitoring camera is accessible by the user terminal based on the first user information. The deletion processing is performed by the user terminal based on the second user information. As a result, even when the user U 2  performs, using the mobile terminal TB 1 , an operation of removing a selected monitoring camera for which monitoring is not required among the selected monitoring cameras specified by the favorite data of the user U 2  itself, a configuration of the favorite data of the other user (for example, the user U 1 ) is not affected, and the user U 1  can view, based on the favorite data linked to the user U 1 , the video data of the corresponding selected monitoring camera, in order to perform monitoring. 
     The server is configured to, after sharing processing of the first access permission data, cause a first display screen to be displayed on the user terminal based on the first user information, and cause a second display screen to be displayed on the user terminal based on the second user information. The first display screen includes the video data of the selected monitoring camera linked to the first access permission data and specified by the monitoring camera information, and information of the target facility. The second display screen includes the video data of the selected monitoring camera linked to the second access permission data and specified by the monitoring camera information. As a result, even when the favorite data of the user U 2  itself is not created, the monitoring camera system  100  can remotely view, by the favorite data of the user U 1 , the video data of the monitoring camera to be monitored, in order to perform monitoring. 
     Although various embodiments have been described above with reference to the drawings, it is needless to say that the present disclosure is not limited to such examples. It will be apparent to those skilled in the art that various changes, modifications, substitutions, additions, deletions, and equivalents can be conceived within the scope of the claims, and it should be understood that these changes, modifications, substitutions, additions, deletions, and equivalents also naturally belong to the technical scope of the present disclosure. Components in various embodiments described above may be combined freely within a range not deviating from the spirit of the invention. 
     INDUSTRIAL APPLICABILITY 
     The present disclosure is useful as a monitoring camera video sharing system and a monitoring camera video sharing method that improve efficiency of data sharing of a video of at least one monitoring camera.