JP2017038252A - Transmission management system, transmission system, information processing apparatus, transmission management method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission management system which facilitates determination of a service content of a session based on transmission quality and reception quality permitted to be used by each transmission terminal participating in the session. SOLUTION: A transmission management system 50 has service identification information for identifying service contents provided to each of a plurality of transmission terminals, one or more transmission quality information corresponding to the service identification information, and one or more reception. The service management means 57 that manages the quality information, the acquisition means 55 that acquires the service identification information of each of the transmission terminals participating in the session, and the transmission terminals participating in the session based on the acquired service identification information. From the extraction means 54 for extracting the transmission quality and the reception quality available in the session and the extracted transmission quality and reception quality, the transmission quality and the reception quality used by each of the transmission terminals participating in the session are selected. It has a determination means for determining [selection diagram] FIG. 7

Description

  The present invention relates to a transmission management system, a transmission system, an information processing apparatus, a transmission management method, and a program.

  As an example of a transmission system that transmits and receives content data between a plurality of transmission terminals via a relay device, a video conference system that performs a video conference or the like via a communication network such as the Internet is known (for example, see Patent Document 1). ).

  Also, a distribution service that distributes protected media content based on an identifier stored in a movable component such as a SIM (Subscriber Identity Module) is known (for example, see Patent Document 2).

  In the transmission system, service contents such as transmission quality and reception quality permitted to be used by each transmission terminal may be stored in a recording medium such as a SIM and set in advance.

  Also, in a transmission system that transmits and receives content data via a relay device, the quality of content data may be converted by the relay device.

  In such a case, the management system that manages the session that transmits / receives content data via the relay device uses the transmission quality and reception quality information that is permitted to be used by each transmission terminal that participates in the session. It was difficult to determine the service contents.

  The embodiment of the present invention has been made in view of the above problems, and determines the service content of a session based on transmission quality and reception quality permitted to be used by each transmission terminal participating in the session. It is an object of the present invention to provide a transmission management system that makes it easy to do.

  In order to solve the above-described problem, a transmission management system according to an embodiment of the present invention is a transmission management system that manages a session for transmitting content data via a relay apparatus, and is provided to each of a plurality of transmission terminals. Service management means for managing service identification information for identifying the service content to be performed, one or more transmission quality information and one or more reception quality information corresponding to the service identification information, and participating in the session An acquisition means for acquiring the service identification information of each transmission terminal, and based on the acquired service identification information, the transmission quality and the reception quality that can be used in the session by each of the transmission terminals participating in the session. Extraction means for extracting, and transmission information for participating in the session from the extracted transmission quality and reception quality. Having said transmission quality and determination means for determining the reception quality of each terminal utilizes the.

  According to an embodiment of the present invention, a transmission management system is provided that makes it easy to determine the service content of a session based on transmission quality and reception quality that are permitted to be used by each transmission terminal participating in the session. can do.

1 is a schematic diagram of a transmission system according to an embodiment. It is the conceptual diagram which showed the transmission / reception state of the image data in a transmission system, sound data, and various management information. It is a conceptual diagram explaining the image quality of the image data which concerns on one Embodiment. It is an external view of the terminal which concerns on one Embodiment. It is a hardware block diagram of the terminal which concerns on one Embodiment. It is a hardware block diagram of the management system which concerns on one Embodiment. It is a functional lineblock diagram of a transmission system concerning one embodiment. It is a function block diagram of the service management part which concerns on one Embodiment, and a session management part. It is a function block diagram of the relay management part which concerns on one Embodiment. It is a conceptual diagram of the relay apparatus management table which concerns on one Embodiment, an authentication management table, and a terminal management table. It is a conceptual diagram of a destination list management table and a session management table according to an embodiment. It is a conceptual diagram of the service management table which concerns on one Embodiment. It is a conceptual diagram of the service priority management table which concerns on one Embodiment. It is a conceptual diagram of the service content management table which the relay apparatus which concerns on one Embodiment manages. It is a sequence diagram which shows the example of the process of the preparation stage of the transmission system which concerns on one Embodiment. It is a sequence diagram (1) which shows the example of the communication processing of the transmission system which concerns on one Embodiment. It is a sequence diagram (2) which shows the example of the communication processing of the transmission system which concerns on one Embodiment. It is a flowchart which shows the flow of the determination process of the service content which concerns on one Embodiment. It is a figure for demonstrating the determination process of the service content which concerns on one Embodiment.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

<System configuration>
FIG. 1 is a schematic diagram of a transmission system according to an embodiment. FIG. 2 is a conceptual diagram showing a state of transmission / reception of image data, sound data, and various management information in the transmission system. FIG. 3 is a conceptual diagram illustrating the image quality of image data according to an embodiment.

  The transmission system includes a data providing system for transmitting content data in one direction from one transmission terminal to the other transmission terminal via the transmission management system, information and emotions between a plurality of transmission terminals via the transmission management system, etc. A communication system that communicates with each other is included. This communication system is a system for mutually transmitting information, emotions, and the like between a plurality of communication terminals (corresponding to “transmission terminals”) via a communication management system (corresponding to “transmission management system”). Examples of the communication system include a video conference system and a video phone system.

  In the present embodiment, a video conference system as an example of a communication system, a video conference management system as an example of a communication management system, and a video conference terminal as an example of a communication terminal are assumed. In addition, a transmission system, a transmission management system, and a transmission terminal will be described. That is, the transmission terminal and the transmission management system of the present invention are not only applied to a video conference system, but also applied to a communication system or a transmission system.

  First, a transmission system 1 shown in FIG. 1 includes a plurality of transmission terminals (10aa, 10ab,...) And displays (120aa, 120ab,...) For the transmission terminals (10aa, 10ab,...). .), A plurality of relay devices (30a, 30b, 30c, 30d), a transmission management system 50, a program providing system 90, a maintenance system 100, and the like. Further, the plurality of terminal transmission terminals (10aa, 10ab,...) Perform transmission by transmission / reception of image data and sound data as an example of content data.

  In the following description, “transmission terminal” is simply expressed as “terminal”, and “transmission management system” is simply expressed as “management system”. An arbitrary terminal among the plurality of terminals (10aa, 10ab,...) Is represented as “terminal 10”. Further, an arbitrary display among a plurality of displays (120aa, 120ab,...) Is represented as “display 120”, and an arbitrary relay apparatus among the plurality of relay apparatuses (30a, 30b, 30c, 30d) is “relay apparatus”. 30 ". Furthermore, a terminal as a request source requesting the start of a video conference is represented as “request source terminal”, and a terminal as a destination (relay destination) as a request destination is represented as “destination terminal”.

  As shown in FIG. 2, in the transmission system 1, a management information session sei for transmitting and receiving various types of management information is transmitted between the request source terminal and the destination terminal via the management system 50. Established. Further, between the request source terminal and the destination terminal, four pieces of data of high resolution image data, medium resolution image data, low resolution image data, and sound data are transmitted and received via the relay device 30. Four sessions are established. Here, these four sessions are collectively shown as an image / sound data session sed. Note that the image / sound data session sed does not necessarily have to be four sessions, and may have a smaller or larger number of sessions than the four sessions.

  Here, the resolution of the image data handled in the present embodiment will be described. In this embodiment, as shown in FIG. 3A, an image that is composed of 160 pixels in the horizontal direction and 120 pixels in the vertical direction and serves as a base image is referred to as a low-resolution image. As shown in FIG. 3B, an image having 320 pixels in the horizontal direction and 240 pixels in the vertical direction is referred to as a medium resolution image. Furthermore, as shown in FIG. 3C, an image composed of 640 pixels in the horizontal direction and 480 pixels in the vertical direction is referred to as a high-resolution image.

  Among these, when passing through a narrow band path (communication path having a narrow transmission band), low-quality image data consisting only of low-resolution image data serving as a base image is relayed. When the band is relatively wide, intermediate resolution image data including low resolution image data serving as a base image and intermediate resolution image data is relayed. Further, when the bandwidth is very wide, high-quality image data composed of low-resolution image data, medium-resolution image data, and high-resolution image data serving as base image quality is relayed.

  The relay device 30 shown in FIG. 1 relays content data among a plurality of terminals 10. The management system 50 centrally manages the login authentication from the terminal 10, the management of the call status of the terminal 10, the management of the destination list, and the communication status of the relay device 30. The image of the image data may be a moving image or a still image, or both a moving image and a still image.

  A plurality of routers (70a, 70b, 70c, 70d, 70ab, 70cd) select an optimum route for image data and sound data. In the following, an arbitrary router among the routers (70a, 70b, 70c, 70d, 70ab, 70cd) is represented as “router 70”.

  The program providing system 90 includes a later-described HD (Hard Disk) 204, and stores a terminal program for causing the terminal 10 to realize various functions (or cause the terminal 10 to function as various means). Further, the program providing system 90 can transmit a terminal program to the terminal 10.

  The HD 204 of the program providing system 90 also stores a relay device program for causing the relay device 30 to realize various functions (or to cause the relay device 30 to function as various means). The relay device program can be transmitted. Further, the HD 204 of the program providing system 90 also stores a transmission management program for causing the management system 50 to realize various functions (or to cause the management system 50 to function as various means). Further, the program providing system 90 can transmit a transmission management program to the management system 50.

  The maintenance system 100 is a computer for performing maintenance, management, or maintenance of at least one of the terminal 10, the relay device 30, the management system 50, and the program providing system 90. For example, it is assumed that the maintenance system 100 is installed in the country, and the terminal 10, the relay device 30, the management system 50, or the program providing system 90 is installed outside the country. In this case, the maintenance system 100 performs maintenance such as maintenance, management, and maintenance of at least one of the terminal 10, the relay device 30, the management system 50, and the program providing system 90 remotely via the communication network 2. . Also, the maintenance system 100 manages the model number, manufacturing number, sales destination, maintenance inspection, or failure history of the terminal 10, the relay device 30, the management system 50, the program providing system 90, etc. without going through the communication network 2. Perform maintenance such as.

  By the way, the terminals (10aa, 10ab, 10ac,...), The relay device 30a, and the router 70a are communicably connected via the LAN 2a. The terminals (10ba, 10bb, 10bc,...), The relay device 30b, and the router 70b are communicably connected via a LAN 2b. The LAN 2a and the LAN 2b are communicably connected by a dedicated line 2ab including a router 70ab, and are constructed in a predetermined area A. For example, the region A is Japan, and the LAN 2a is constructed in a business office in Tokyo. In addition, the region B is China, and the LAN 2b is built in a Chinese office.

  On the other hand, the terminals (10ca, 10cb, 10cc,...), The relay device 30c, and the router 70c are communicably connected via a LAN 2c. The terminal 10d (a, 10db, 10dc,...), The relay device 30d, and the router 70d are communicably connected via a LAN 2d. The LAN 2c and the LAN 2d are communicably connected via a dedicated line 2cd including the router 70cd, and are constructed in a predetermined area B. For example, the region C is the United States of America, and the LAN 2c is built in an office in the United States. In addition, the region D is Europe, and the LAN 2d is built in a European office. Each router (70a, 70b, 70c, 70d) is connected to be communicable via the Internet 2i.

  In addition, the management system 50 and the program providing system 90 are communicably connected to the terminal 10 and the relay device 30 via the Internet 2i. The management system 50 and the program providing system 90 may be installed in the region A, the region B, the region C, or the region D, or may be installed in a region other than these.

  In the present embodiment, the LAN 2a, the LAN 2b, the Internet 2i, the LAN 2c, and the LAN 2d are included in the communication network 2 of the present embodiment. The communication network 2 may include a portion where not only wired communication but also wireless communication such as a wireless LAN or a wireless PAN (Personal Area Network) is performed.

  Further, in FIG. 1, four sets of numbers shown below each terminal 10, each relay device 30, management system 50, each router 70, and program providing system 90 are simplified IP addresses in general IPv4. Is shown. For example, the IP address of the terminal 10aa is “1.2.1.3”. In addition, IPv6 may be used instead of IPv4, but in order to simplify the description, description will be made using IPv4.

  In addition, each terminal 10 is not only a call between a plurality of business establishments or a call between different rooms in the same business establishment, but a call within the same room or a call between the outdoors and indoors or outdoors and outdoors. May be used. When each terminal 10 is used outdoors, for example, a public wireless communication such as a mobile phone communication network or a public wireless LAN is used.

<Hardware configuration>
Next, the hardware configuration of this embodiment will be described.

(Appearance of terminal)
FIG. 4 is an external view of the terminal 10 according to the present embodiment. As shown in FIG. 4, the terminal 10 includes a housing 1100, an arm 1200, and a camera housing 1300. Among these, the front wall surface 1110 of the housing 1100 is provided with an air intake surface formed by a plurality of air intake holes, and the rear wall surface 1120 of the housing 1100 is provided with an air exhaust surface formed with a plurality of air exhaust holes. 1121 is provided. Thereby, the driving of the cooling fan built in the housing 1100 takes in outside air in front of the terminal 10 through the intake surface provided on the front side wall surface 1110 of the housing 1100, and the terminal 10 of the terminal 10 through the exhaust surface 1121. It is possible to exhaust backward. A sound collecting hole 1131 is formed in the right side wall surface 1130 of the housing 1100, and sounds such as sound, sound, noise, and heartbeat can be collected by a built-in microphone 114 described later.

  An operation panel 1150 is formed on the right wall surface 1130 side of the housing 1100. The operation panel 1150 is provided with a plurality of operation buttons (108a to 108e) described later, a power switch 109 described later, and an alarm lamp 119 described later. Further, the operation panel 1150 is formed with a sound output surface 1151 formed by a plurality of sound output holes through which an output sound from a built-in speaker 115 described later passes.

  Further, a housing 1160 as a recess for housing the arm 1200 and the camera housing 1300 is formed on the left wall surface 1140 side of the housing 1100. The right side wall surface 1130 of the housing 1100 is provided with a plurality of connection ports (1132a to 1132c) for electrically connecting cables to an external device connection I / F 118 described later. On the other hand, the left wall surface 1140 of the housing 1100 is provided with a connection port (not shown) for electrically connecting the cable 120c for the display 120 to an external device connection I / F 118 described later.

  In the following description, when an arbitrary operation button is indicated among the operation buttons (108a to 108e), "operation button 108" is used, and an arbitrary connection port is indicated among the connection ports (1132a to 1132c). In this case, “connection port 1132” is used.

  Next, the arm 1200 is attached to the housing 1100 via a torque hinge 1210, and the arm 1200 is configured to be able to rotate in the vertical direction with respect to the housing 1100 within a tilt angle θ1 of 135 degrees. ing. FIG. 4 shows a state where the tilt angle θ1 is 90 degrees. The camera housing 1300 is provided with a built-in camera 112 described later, and can capture images of users, documents, rooms, and the like. A torque hinge 1310 is formed in the camera housing 1300. The camera housing 1300 is attached to the arm 1200 via a torque hinge 1310. The camera housing 1300 is attached to the arm 1200 via a torque hinge 1310. The camera housing 1300 has a pan angle θ2 of ± 180 degrees and a tilt angle θ3 of ± 45 degrees, with the state shown in FIG. 4 being 0 degrees with respect to the arm 1200. The range is configured to be rotatable in the vertical and horizontal directions.

  Note that the external view of FIG. 4 is merely an example and is not limited to this external view. For example, the terminal 10 may be a general-purpose PC, a smartphone, or a tablet terminal. The camera and microphone are not necessarily built-in and may be externally attached. Further, since the management system 50 has the same appearance as that of a general server computer, description of the appearance is omitted.

(Device hardware configuration)
FIG. 5 is a hardware configuration diagram of the terminal 10 according to this embodiment of the present invention. The terminal 10 includes a general computer configuration, for example, a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, a flash memory 104, and an SSD (Solid State Drive). 105. Further, the terminal 10 includes a media drive 107, operation buttons 108, a power switch 109, a network I / F (Interface) 111, a camera 112, an image sensor I / F 113, a microphone 114, a speaker 115, and a sound input / output I / F 116. Have. Further, the terminal 10 includes a display I / F 117, an external device I / F 118, a bus 110, and the like.

  The CPU 101 is an arithmetic device that implements each function provided in the terminal 10 by reading a program and data from the ROM 102, the flash memory 104, and the like and executing processing. The ROM 102 is a nonvolatile memory that stores in advance a program used to start the CPU 101 such as an IPL (Initial Program Loader). The RAM 103 is a volatile memory used as a work area for the CPU 101.

  The flash memory 104 is a storage device that stores, for example, an OS (Operating System), application programs, and various data. The SSD 105 controls reading and writing of various data with respect to the flash memory 104 according to the control of the CPU 101. The media drive 107 controls reading or writing (storage) of data with respect to the recording medium 106 such as a memory card, for example.

  The operation button 108 is an input device that receives an input operation of a user of the terminal 10. The power switch 109 is a switch for switching on / off the power of the terminal 10. The network I / F 111 is a communication interface for performing data transmission using the communication network 2.

  The camera 112 includes an image sensor for imaging a subject in accordance with the control of the CPU 101. The imaging element I / F 113 controls imaging by the camera 112 and converts the captured data into predetermined image data. The microphone 114 converts the collected sound into an electrical signal. The speaker 115 converts the sound signal into sound and outputs the sound. The sound input / output I / F 116 controls sound input / output through the microphone 114 and the speaker 115.

  The display I / F 117 transmits image data to the external display 120 under the control of the CPU 101. The external device I / F 118 is an interface for connecting various external devices. The bus 110 is commonly connected to the above-described components, and transmits an address signal, a data signal, various control signals, and the like.

  The display 120 is a display unit configured by a liquid crystal or an organic EL that displays an image of a subject, an operation icon, and the like. The display 120 is connected to the display I / F 117 by a cable 120c. The cable 120c may be an analog RGB (VGA) signal cable or a component video cable.

  The camera 112 includes a lens and a solid-state image sensor that converts light into electric charges and digitizes a subject image (video). As the solid-state image sensor, a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device) is used. Etc. are used.

  External devices such as an external camera, an external microphone, and an external speaker can be connected to the external device connection I / F 118 by a USB (Universal Serial Bus) cable or the like. When an external camera is connected, the external camera is driven in preference to the built-in camera 112 under the control of the CPU 101. Similarly, when an external microphone is connected or when an external speaker is connected, each of the external microphones and the built-in speaker 115 is given priority over the internal microphone 114 and the internal speaker 115 according to the control of the CPU 101. An external speaker is driven.

  The recording medium 106 is, for example, a recording medium such as various memory cards or a SIM (Subscriber Identity Module) card. The recording medium 106 is detachable from the terminal 10.

  Further, the program for the terminal 10 may be recorded in a computer-readable recording medium such as the recording medium 106 and distributed as a file in an installable or executable format. Further, the program for the terminal 10 may be stored in the flash memory 104, or may be stored in advance in the ROM 102, for example.

(Hardware configuration of management system)
FIG. 6 is a hardware configuration diagram of a management system according to an embodiment. The management system 50 has a general computer hardware configuration, and includes, for example, a CPU 201, ROM 202, RAM 203, HD 204, HDD (Hard Disk Drive) 205, media drive 207, and display 208. The management system 50 includes a network I / F 209, a keyboard 211, a mouse 212, an optical drive 214, a bus 210, and the like.

  The CPU 201 is an arithmetic device that implements each function included in the management system 50 by reading a program or data stored in the ROM 202, the HD 204, or the like and executing the processing. The ROM 202 is a non-volatile memory that stores in advance a program used to start the CPU 201 such as an IPL. The RAM 203 is a volatile memory used as a work area for the CPU 201.

  The HD 204 is a storage device that stores, for example, an OS, a program such as an application program, and various types of data. The HDD 205 controls reading or writing of various data with respect to the HD 204 according to the control of the CPU 201. The display 208 is a display device that displays various types of information such as a cursor, menu, window, character, or image.

  The network I / F 209 is a communication interface for performing data communication using the communication network 2. The keyboard 211 is an example of an input device for accepting input operations such as characters, numerical values, and various instructions by the user. The mouse 212 is an example of a pointing device that receives operations such as selection and execution of various instructions by a user, selection of a processing target, movement of a cursor, and the like.

  The media drive 207 controls reading and writing (storage) of data with respect to the recording medium 206 such as a memory card, for example. The optical drive 214 controls reading or writing of data with respect to various optical disks 213 as an example of a removable recording medium. The bus 210 electrically connects the above-described components and transmits an address signal, a data signal, various control signals, and the like.

  Note that the hardware configuration of the computer is just an example. For example, the display 208, the keyboard 211, the mouse 212, and the like may be externally attached to the outside of the management system 50.

  The program for the management system 50 is a file in an installable or executable format, and is recorded on a computer-readable recording medium such as the recording medium 206 or the optical disk 213 for distribution. May be. The program for the management system 50 described above may be stored in the HD 204 or may be stored in the ROM 202 in advance.

  Further, since the relay device 30 has the same hardware configuration as that of the management system 50, the description thereof is omitted. However, a program for the relay device 30 for controlling the relay device 30 is recorded in the HD 204. Also in this case, the relay device program is a file in an installable or executable format, and is recorded on a computer-readable recording medium such as the recording medium 206 or the optical disk 213 and distributed. good. The program for the relay device 30 may be stored in the HD 204 or may be stored in the ROM 202 in advance.

  Further, since the program providing system 90 and the maintenance system 100 have the same hardware configuration as the management system 50, the description thereof is omitted. However, a program for the program providing system 90 for controlling the program providing system 90 is recorded in the HD 204. Also in this case, the program for the program providing system 90 is a file in an installable format or an executable format, and is recorded on a computer-readable recording medium such as the recording medium 206 or the optical disk 213 for distribution. Anyway. The program for the program providing system 90 may be stored in the HD 204 or may be stored in the ROM 202 in advance.

<Functional configuration>
Next, the functional configuration of the transmission system 1 will be described.

  FIG. 7 is a functional configuration diagram of a transmission system according to an embodiment. In FIG. 7, the transmission system 1 is connected so that the terminal 10, the relay device 30, and the management system 50 can perform data communication via the communication network 2. Further, the program providing system 90 shown in FIG. 1 is not directly related to the video conference communication, and thus is omitted in FIG.

(Functional configuration of terminal)
The terminal 10 includes a transmission / reception unit 11, an operation input reception unit 12, a communication control unit 13, an imaging unit 14, a sound input unit 15 a, a sound output unit 15 b, a display control unit 16, and a storage / readout unit 17. Each of these units is a function realized by any one of the constituent elements shown in FIG. 5 operating according to a command from the CPU 101 in accordance with the program for the terminal 10 expanded from the flash memory 104 onto the RAM 103. Or a functioning means. Further, the terminal 10 has a storage unit 1000 realized by the RAM 103 shown in FIG. 5 and the flash memory 104 shown in FIG. Furthermore, a recording medium 1010 realized by the recording medium 106 shown in FIG. 5 is inserted into the terminal 10, and various data are read or written by the storage / reading unit 17.

(Functional configuration of terminal)
Next, each functional configuration of the terminal 10 will be described in detail. In the following, in describing each functional configuration of the terminal 10, among the components illustrated in FIG. 5, a relationship with main components for realizing each functional configuration of the terminal 10 will also be described. .

  The transmission / reception unit 11 is realized by a command from the CPU 101 shown in FIG. 5 and a network I / F 111 shown in FIG. Or information). The transmission / reception unit 11 starts receiving state information indicating the state of each terminal as a destination candidate from the management system 50 before starting a call with a desired destination terminal. This status information includes not only the operating status of each terminal 10 (online or offline status) but also details such as whether it is possible to make a call, whether it is in a call, or being away from the office when online. State.

  The operation input receiving unit 12 is realized by a command from the CPU 101 shown in FIG. 5 and the operation buttons 108 and the power switch 109 shown in FIG. 5 and receives various inputs by the user. For example, when the user turns on the power switch 109 shown in FIG. 5, the operation input accepting unit 12 shown in FIG. 7 accepts the power on and controls the power off.

  The communication control unit (communication control means) 13 is realized by a command from the CPU 101 shown in FIG. The communication control unit 13 receives, for example, the login request information indicating that the login is requested from the transmission / reception unit 11 to the management system 50 via the communication network 2 and the current time of the request source terminal. Automatically send IP address. When the user turns off the power switch 109 from the on state, the operation input accepting unit 12 turns off the power after the transmission / reception unit 11 transmits state information indicating that the power is off to the management system 50. Thereby, the management system 50 side can grasp that the terminal 10 has been turned off from being turned on.

  In addition, the communication control unit 13 performs various communication controls such as establishment and disconnection of a communication session for transmitting / receiving content data to / from another terminal 10 via the relay device 30. The communication control unit 13 according to the present embodiment transmits the session control information (for example, start request information, start response information, and the like described later) transmitted to the management system 50 together with the service ID of the terminal 10. The service ID is an example of service identification information that identifies the service content provided to each terminal 10.

  The imaging unit 14 is configured to execute predetermined commands from the CPU 101 illustrated in FIG. 5 and imaging data obtained by imaging the subject, which is realized by the camera 112 and the imaging device I / F 113 illustrated in FIG. 5. Converted to image (video) data and output.

  The sound input unit 15a is realized by the instruction from the CPU 101 shown in FIG. 5 and the voice input / output I / F 116 shown in FIG. 5, and the user's voice is converted into a voice signal by the microphone 114. Thereafter, the audio signal is converted into predetermined sound data and output. The sound output unit 15b is realized by the command from the CPU 101 shown in FIG. 5 and the voice input / output I / F 116 shown in FIG. 5, and converts the sound data into a voice signal and outputs it to the speaker. Then, sound is output from the speaker 115.

  The display control unit 16 is realized by a command from the CPU 101 shown in FIG. 5 and the display I / F 117 shown in FIG. In addition, the display control unit 16 performs control for transmitting the received image data to the display 120. In addition, the display control unit 16 can transmit information on the destination list received from the management system 50 to the display 120 and cause the display 120 to display the destination list.

  The storage / reading unit (reading unit) 17 is realized by the instruction from the CPU 101 shown in FIG. 5 and the SSD 105 shown in FIG. 5, or realized by the instruction from the CPU 101. The storage / reading unit 17 performs a process of storing various data in the storage unit 1000 and reading out various data stored in the storage unit 1000. The storage unit 1000 stores a terminal ID (Identification) for identifying the terminal 10, a password, and the like. Furthermore, the storage unit 1000 overwrites and stores image data and sound data received when a call is made with the destination terminal. Among these, an image is displayed on the display 120 by the image data before being overwritten, and sound is output from the speaker 115 by the sound data before being overwritten.

  Further, the storage / reading unit 17 reads the service ID from the recording medium 1010 on which the service ID (service identification information) for identifying the service provided to the terminal 10 is recorded. The recording medium 1010 on which the service ID is recorded may be a readable / writable recording medium such as a memory card, for example, or a recording on a SIM card or the like on which user contract information is recorded. It may be a medium.

  When the recording medium 1010 is a SIM card, the service ID may be SIM identification information related to the user's contract information, or information related to service contents stored separately from the SIM identification information. There may be.

  Further, the terminal 10 may be one that uses SIM identification information recorded in the recording medium 1010 as a terminal ID instead of the terminal ID recorded in the storage unit 1000.

  Note that the terminal ID, the relay device ID, and the service ID described later in this embodiment are a language, characters, symbols, or various signs used to uniquely identify the terminal 10, the relay device 30, and the service contents, respectively. An example of identification information such as The terminal ID and the relay device ID service ID may be identification information in which at least two of the language, characters, symbols, and various indicia are combined.

  Further, instead of the terminal ID, a user ID for identifying the user of the terminal 10 may be used.

(Functional configuration of management system)
The management system 50 includes a transmission / reception unit 51, a terminal authentication unit 52, a terminal state management unit 53, a terminal extraction unit 54, a terminal state acquisition unit 55, a session management unit 56, a service management unit 57, a storage / reading unit 58, and the like. doing. Each of these units is a function realized by any one of the constituent elements shown in FIG. 6 being operated by a command from the CPU 201 according to the program for the management system 50 expanded on the RAM 203 from the HD 204 or It is a means to function. Further, the management system 50 includes a storage unit 5000 realized by the HD 204 or the like shown in FIG.

(Functional configuration of the management system)
Next, each functional configuration of the management system 50 will be described in detail. In the following, in describing each functional configuration of the management system 50, among the components shown in FIG. 6, the relationship with the main components for realizing each functional configuration of the management system 50 is also described. explain.

  The transmission / reception unit 51 is executed by the command from the CPU 201 shown in FIG. 6 and the network I / F 209 shown in FIG. Or information).

  The terminal authentication unit 52 is realized by a command from the CPU 201 shown in FIG. For example, the terminal authentication unit 52 determines whether the combination of the terminal ID and the password included in the login request information received via the transmission / reception unit 51 is included in the authentication management DB (Database) 5002. Thus, the terminal 10 is authenticated.

  The terminal state management unit 53 is realized by a command from the CPU 201 shown in FIG. 6 and manages the operating state of the request source terminal that has requested login. The terminal status management unit 53 stores and manages the destination management DB 5003 in association with the destination name, the operating status, the reception date and time of request information, and the IP address of the request source terminal for each terminal ID. Further, the terminal state management unit 53 switches the terminal 10 from the on state to the off state of the power switch 109 of the terminal 10, so that the terminal state management unit 53 is connected to the terminal state based on the state information indicating that the power is turned off. The operation state indicating online of the management DB 5003 is changed to offline. The terminal management DB 5003 will be described later.

  The terminal extraction unit 54 is realized by a command from the CPU 201 shown in FIG. The terminal extraction unit 54 searches the destination list management DB 5004 using the terminal ID of the request source terminal that requested the login as a key, and extracts the terminal ID of the destination terminal that can communicate with the request source terminal. Further, the terminal extraction unit 54 searches the destination list management DB 5004 using the terminal ID of the request source terminal that has requested the login as a key, and other requests that register the terminal ID of the request source terminal as candidates for the destination terminal. The terminal ID of the original terminal is also extracted.

  The terminal state acquisition unit 55 is realized by a command from the CPU 201 shown in FIG. The terminal status acquisition unit 55 searches the terminal management DB 5003 described above using the destination terminal candidate terminal ID extracted by the terminal extraction unit 54 as a search key, and operates for each terminal ID extracted by the terminal extraction unit 54. Is read. Thereby, the terminal state acquisition unit 55 can acquire the operating state of the candidate destination terminal that can make a call with the request source terminal that has requested the login. Further, the terminal state acquisition unit 55 searches the terminal management DB 5003 described above using the terminal ID extracted by the terminal extraction unit 54 as a search key, and also acquires the operating state of the request source terminal that requested the login. The destination list management DB 5004 will be described later.

  The session management unit 56 is realized by a command from the CPU 201 shown in FIG. 6, and includes, for example, a session control unit 56a and a session information management unit 56b as shown in FIG.

  FIG. 8 is a functional configuration diagram of a service management unit and a session management unit according to an embodiment.

  In FIG. 8, a session control unit (session control means) 56a controls a session managed by the management system 50, for example, a session such as a remote conference and content distribution. The session control includes, for example, control for establishing a session, control for causing the terminal 10 to participate in the established session, control for disconnecting the session, generation of a session ID, and the like.

  The session information management unit 56b associates the request source terminal ID of the terminal 10 that requested the start of the session and the destination terminal ID of the destination terminal 10 with the session management DB 5005 in association with the session ID generated by the session control unit 56a. Remember and manage. The session management DB 5005 will be described later.

  The service management unit 57 in FIG. 7 is realized by a command from the CPU 201 shown in FIG. 6, and for example, as shown in FIG. 8, a service information management unit 57a, a service ID acquisition unit 57b, and a service content extraction unit 57c. , And a service content determination unit 57d.

  In FIG. 8, the service information management unit (service information management means) 57a stores a service ID for identifying the service content provided to each of the plurality of terminals 10 and the service content corresponding to each service ID in the service management DB 5006. Remember and manage.

  The service content of the terminal 10 includes, for example, one or more transmission quality information indicating the quality of content data transmitted by the terminal 10 and one or more reception quality indicating the quality of content data received by the terminal 10. This information is included.

  The service information management unit 57a associates the service ID with the service content corresponding to the service ID in accordance with, for example, an operation by the administrator of the management system 50 or request information from another information processing apparatus or the like. And stored in the service management DB 5006. The service management DB 5006 will be described later.

  The service ID acquisition unit (acquisition means) 57b acquires the service ID of each terminal 10 participating in the session. For example, the service ID acquisition unit 57b acquires messages such as start request information and start response information received from each of the terminals 10 participating in the session from the session control unit 56a, and acquires a service ID included in the acquired information. (Extract.

  As another example, the service ID acquisition unit 57b acquires the identification information (terminal ID) of the terminal 10 from the information received from each of the terminals 10, and stores the terminal ID and the service ID in association with each other in advance. For example, the service ID may be acquired from the service ID.

  The service ID will be described later.

  The service content extraction unit (extraction means) 57c extracts the service content that each terminal 10 can use in a session based on the service content corresponding to the service ID of each terminal 10 acquired by the service ID acquisition unit 57b.

  Preferably, the service content extraction unit 57c includes the transmission quality of the terminal 10 participating in the session in one or more pieces of transmission quality information corresponding to the service ID of the terminal 10 and also participates in the session. So that the received quality is equal to or better than the received quality. In addition, the service content extraction unit 57c includes the reception quality of the terminal 10 participating in the session in one or more pieces of reception quality information corresponding to the service ID of the terminal 10, and the other terminal 10 participating in the session. Extraction is performed so as to be equal to or lower than the transmission quality.

  As will be described later, in this embodiment, the terminal 10 transmits content data to the relay device 30, and the relay device 30 transmits the content data received from the terminal 10 to other terminals 10 participating in the session. This is because it is converted into the corresponding quality and delivered. In general, when converting low-quality image data into high-quality images, the image quality deteriorates and the processing load increases. Therefore, in the present embodiment, the service contents (transmission quality and reception quality) of each terminal 10 are extracted so that the quality conversion by the relay device 30 does not change the quality or lower the quality.

  The service content determination unit 57d (determination means) determines the service content of each terminal 10 participating in the session based on the service content (transmission quality and reception quality) of each terminal 10 extracted by the service content extraction unit 57c. . For example, when there are a plurality of transmission quality or reception quality candidates that can be used by the terminal 10 extracted by the service content extraction unit 57c, the service content determination unit 57d selects one service content of the terminal 10 from the candidates ( Transmission quality, reception quality, etc.).

  Preferably, the service content determination unit 57d is associated with each service ID, based on a service priority management DB (service priority information) 5007 in which content prioritized for each quality item of transmission quality or reception quality is stored in advance. The service content of each terminal 10 is determined. The service priority management DB 5007 will be described later.

  Preferably, the quality of the content data includes quality items such as the frame rate, bit rate, resolution, image quality, or color depth of the image data. Preferably, the quality of the content data includes a quality item such as a sampling rate, a bit rate, or a quantization bit number of sound (audio) data.

  Returning to FIG. 7, the description of the functional configuration of the management system 50 will be continued.

  The storage / reading unit 58 of the management system 50 is realized by the command from the CPU 201 and the HDD 205 shown in FIG. 6 or by the command from the CPU 201. The storage / reading unit 58 stores various data to the storage unit 5000 and reads various data from the storage unit 5000. The storage / reading unit 58 may store various data in an external device (for example, a storage server) connected via the communication network 2 or the like.

<Functional configuration of relay device>
The relay device 30 includes a transmission / reception unit (transfer unit) 31, a quality change unit 32, a relay management unit 33, and a storage / reading unit 34. Each of these units functions or functions realized by any one of the constituent elements shown in FIG. 6 operating according to a command from the CPU 201 according to the relay device program expanded from the HD 204 onto the RAM 203. Means. The relay device 30 includes a storage unit 3000 configured by the RAM 203 illustrated in FIG. 6 and / or the HD 204 illustrated in FIG.

(Each functional configuration of the relay device)
Next, each functional configuration of the relay device 30 will be described. In the following, in describing each functional configuration of the relay device 30, among the components illustrated in FIG. 6, the relationship with the main components for realizing each functional configuration of the relay device 30 is also described. explain.

  The transmission / reception unit (transfer unit) 31 is realized by a command from the CPU 201 shown in FIG. 6 and the network I / F 209 shown in FIG. Sends and receives various data (or information) with the system. In addition, the transmission / reception unit 31 also serves as a transfer unit, and in accordance with instructions from the relay management unit 33, the content data (image data, sound data, etc.) received from the terminal 10 participating in the session is added to the session. Transfer (relay) to the terminal 10.

  The quality changing unit 32 is realized by a command from the CPU 201 shown in FIG. The quality changing unit 32 changes (converts) the quality of the content data transferred by the transmission / reception unit 31 in accordance with an instruction from the relay management unit 33.

  The relay management unit 33 is realized by a command from the CPU 201 illustrated in FIG. 6 and includes, for example, a service content management unit 33a, a quality setting unit 33b, and a relay control unit 33c as illustrated in FIG.

  FIG. 9 is a functional configuration diagram of the relay management unit according to the embodiment.

  The service content management unit 33a stores the session information received from the management system 50 via the transmission / reception unit 31 in the service content management DB 3001 for management. The service content management DB 3001 will be described later.

  When the session is started, the quality setting unit 33b sets the communication quality conversion (change) content of the quality changing unit 32 based on the session information stored in the service content management DB 3001.

  The relay control unit 33 c controls content data transfer (relay) processing by the transmission / reception unit (transfer unit) 31. For example, the relay control unit 33c instructs the transmission / reception unit (transfer unit) 31 on the transfer destination of the content data received from each terminal 10 participating in the session.

  With the above configuration, the quality changing unit 32 of the relay device 30 changes the quality of the content data transferred by the transmission / reception unit (transfer unit) 31 based on the session information managed by the service content management unit 33a. Send to the specified forwarding destination.

  The relay device 30 according to the present embodiment receives the content data transmitted from the terminal 10 participating in the session, converts the received content data into the reception quality of the other terminal 10 participating in the session, and transfers it. At this time, if the quality of the content data at the transfer destination is the same as the quality of the content data received from the transfer source, the relay device 30 may perform transfer without converting the quality of the content data.

  The storage / reading unit 34 is realized by the instruction from the CPU 201 and the HDD 205 shown in FIG. 6, and performs processing for storing various data in the storage unit 3000 and processing for reading various data stored in the storage unit 3000. Do.

<Example of information managed by the management system>
Here, each management DB stored in the storage unit 5000 of the management system 50 will be described.

  FIG. 10 is a conceptual diagram of a relay device management table, an authentication management table, and a terminal management table according to an embodiment.

(Relay device management table)
The relay device management DB 5001 stored in the storage unit 5000 of the management system 50 includes, for example, a relay device management table 1001 as shown in FIG. In this relay device management table 1001, for each relay device ID of each relay device 30, the operating status of each relay device 30, the reception date and time of the operating status, the IP address of each relay device 30, and the maximum data transmission of each relay device 30 The speed (Mbps) and the like are managed in association with each other. For example, in the relay device management table 1001 shown in FIG. 10A, it is indicated that the relay device 30a having the relay device ID “111a” is online (ON line). In addition, it is indicated that the date and time when the management system 50 receives the operation state is “13:00 on April 10, 20xx”. Further, in the relay device management table 1001, the IP address of the relay device 30a is “1.2.1.2”, and the maximum data transmission rate in the relay device 30a is “100 Mbps”. ing.

(Authentication management table)
Further, the authentication management DB 5002 stored in the storage unit 5000 of the management system 50 includes, for example, an authentication management table 1002 as shown in FIG. In the authentication management table 1002, each terminal ID of the terminal 10 managed by the management system 50 and the password of each terminal 10 are managed in association with each other. For example, in the authentication management table 1002 shown in FIG. 10B, the password of the terminal 10 whose terminal ID is “01aa” is “aaa”.

(Terminal management table)
Furthermore, the terminal management DB 5003 stored in the storage unit 5000 of the management system 50 includes, for example, a terminal management table 1003 as shown in FIG. In this terminal management table 1003, for each terminal ID of each terminal 10, the destination name when each terminal 10 is the destination, the operating state of each terminal 10, and the reception date and time when the login request information described later was received by the management system 50. , And the IP address of the terminal 10 are managed in association with each other. For example, in the terminal management table 1003 shown in FIG. 10C, the terminal 10 with the terminal ID “01aa” has the terminal name “Japan Tokyo Office AA terminal” and the operation state is “online (communicable)”. ) ". Further, the terminal 10 with the terminal ID “01aa” has the date and time when the login request information is received by the management system 50 “13:40 on April 10, 20xx” and the IP address “1.2.1”. .3 ".

  FIG. 11 is a conceptual diagram of a destination list management table and a session management table according to an embodiment.

(Destination list management table)
The destination list management DB 5004 stored in the storage unit 5000 of the management system 50 includes, for example, a destination list management table 1101 as shown in FIG. In the destination list management table 1101, the terminal ID of the destination terminal registered as a destination terminal candidate with respect to the request source terminal ID that is the terminal ID of the request source terminal that requests the start of communication (transmission) in the video conference. Are managed in association with each other. For example, in the destination list management table 1101 shown in FIG. 11A, a destination terminal candidate that can request the start of communication from a request source terminal whose terminal ID is “01ab” is a terminal ID “ These terminals are “01aa”, “01ca”, and “01cb”. This destination terminal candidate is updated by being added or deleted in response to a request for addition or deletion from an arbitrary request source terminal to the management system 50.

(Session management table)
The session management DB 5005 stored in the storage unit 5000 of the management system 50 includes, for example, a session management table 1102 as shown in FIG. The session management table 1102 includes, for each session ID, which is session identification information, the relay device ID of the relay device 30 used for relay, the terminal ID of the request source terminal, the terminal ID of the destination terminal, and the delay time (ms). And the reception date and time when the delay time is received are managed. For example, in the session management table 1102 shown in FIG. 11B, the session with the session ID “se3” is performed between the request source terminal ID “01bb” and the destination communication “01da”. It is shown. Further, it is indicated that the session with the session ID “se3” is started at “20xx / 4/10 13:20” via the relay device with the relay device ID “111a”.

(Service management table)
FIG. 12 is a conceptual diagram of a service management table according to an embodiment.

  The service management DB 5006 stored in the storage unit 5000 of the management system 50 includes, for example, a service management table 1201 as shown in FIG. In this service management table 1201, a plurality of service IDs, one or more pieces of transmission quality information and one or more pieces of reception quality information corresponding to each service ID are stored in association with each other.

  The service ID is an example of service identification information for identifying the service content provided to each of the plurality of terminals 10 (or users of the plurality of terminals 10) managed by the management system 50.

  The quality item is information indicating one or more transmission quality information provided to the terminal 10 (or the user of the terminal 10) and one or more reception quality information regarding the quality item.

  The information indicating the transmission quality and the information indicating the reception quality include quality items such as the frame rate, bit rate, image quality, resolution, or color depth of the image data transmitted by the terminal 10, for example. The example of the service management table 1201 illustrated in FIG. 12 includes quality items such as a reception frame rate, a transmission frame rate, a reception image quality, and a transmission image quality.

  The frame rate indicates the number of frames of an image processed per unit time, and is expressed, for example, in units of fps (frame per second). The received image quality is represented by the low resolution, medium resolution, high resolution, etc. described with reference to FIG.

  The larger the fps value, the smoother the movement of the image (moving image), but the amount of data to be transmitted increases. The received image quality is higher in the medium resolution than in the low resolution, but the amount of data to be transmitted is also increased. Therefore, when the available communication band is limited, the frame rate may decrease when the medium resolution is selected with emphasis on image quality, and the image quality may decrease when the fps value is increased with emphasis on motion.

  In addition, the information indicating the transmission quality and the information indicating the reception quality include quality items such as a sampling rate, a bit rate, or a quantization bit number of sound data transmitted by the terminal 10, for example. In the example of the service management table 1201 shown in FIG. 12, quality items such as a reception sampling rate and a transmission sampling rate are included.

  The sampling rate indicates the number of times of sampling of sound per unit time, and is represented by a sampling frequency, for example. The higher the sampling frequency, the better the sound quality.

  Note that the information specifying the communication quality included in the service content may include information indicating an encoding method. For example, when the terminal 10 can process an image by selecting a plurality of encoding methods (H.264 / AVC, H.264 / SVC, H.265, etc.), the service content included in the service management table 1201 The information including may be information that specifies an encoding method.

  The contents of the service management table 1201 are information set in advance by an administrator of the management system 50, a service provider, or the like.

(Service priority management table)
FIG. 13 is a conceptual diagram of a service priority management table according to an embodiment.

  The service priority management DB (service priority information) 5007 stored in the storage unit 5000 of the management system 50 includes, for example, a service priority management table 1301 as shown in FIG. The service priority management table 1301 stores in advance information indicating the priority contents for each quality item of transmission quality and reception quality in association with each service ID.

  In the example of FIG. 13, the service ID “sv901” indicates that when there are a plurality of transmission frame rate options, the higher frame rate is selected with priority. The service ID “sv902” indicates that when there are a plurality of transmission frame rate options, the lower frame rate is preferentially selected. Similarly, the contents of priority quality are shown for other quality items.

  When there are a plurality of service contents extracted by the service content extraction unit 57c, the service content determination unit 57d of the management system 50 uses the service priority management DB 5007 to narrow down (decide) the service content of one session. Do.

<Example of information managed by relay device>
(Service content management table)
FIG. 14 is a conceptual diagram of a service content management table managed by the relay device according to the embodiment. The service content management DB 3001 stored in the storage unit 3000 of the relay device 30 includes, for example, a service content management table 1401 as shown in FIG. The service content management table 1401 stores the service content for each session notified from the management system 50 in association with the session ID which is identification information of each session. For example, as shown in FIG. 14, the service content includes a terminal ID that is identification information of each terminal 10, transmission quality (for example, transmission frame rate) of each terminal ID, reception quality (for example, reception frame rate), and the like. Information is stored.

<Process flow>
Next, a processing flow of the transmission management method in the transmission system 1 will be described.

(Preparation process)
FIG. 15 is a sequence diagram illustrating an example of processing in a preparation stage of the transmission system according to the first embodiment. Here, as an example, processing in the preparation stage before the session is started by the terminal 10A, the terminal 10B, and the terminal 10C will be described. In the following description, it is assumed that the terminal ID of the terminal 10A is “01aa”, the terminal ID of the terminal 10B is “01ba”, and the terminal ID of the terminal 10C is “01db”. In FIG. 15, it is assumed that various types of management information are transmitted and received through the management information session sei shown in FIG.

  First, when the user of the terminal 10A, which is a request source terminal, turns on the power switch 109 shown in FIG. 5, the operation input accepting unit 12 shown in FIG. Is turned on (step S21). Then, the communication control unit 13 transmits login request information for requesting login from the transmission / reception unit 11 to the management system 50 via the communication network 2 when the power is turned on (step S22). Note that the login request information is transmitted when the power switch 109 is turned on, for example, and may be transmitted when the user operates the operation button 108 or the like.

  Further, the login request information includes a terminal ID (request source terminal ID) and a password for identifying the terminal 10A as the request source. These terminal ID and password are information read from the storage unit 1000 via the storage / readout unit 17, for example. Alternatively, the terminal ID and password may be recorded on the recording medium 1010 and read from the recording medium 1010. Further, when the login request information is transmitted from the terminal 10A to the management system 50, the management system 50 that is the reception side can grasp the IP address of the terminal 10A that is the transmission side.

  Next, the terminal authentication unit 52 of the management system 50 searches the authentication management table 1002 using the terminal ID and password included in the login request information received via the transmission / reception unit 51 as search keys. The terminal authentication unit 52 performs terminal authentication depending on whether or not the combination of the terminal ID and password included in the login request information received from the terminal 10A is included in the authentication management table 1002 (step S23).

  When the terminal authentication unit 52 determines that the login request is from the terminal 10 </ b> A having a valid usage right, the terminal state management unit 53 stores the terminal ID “01aa” of the terminal 10 </ b> A recorded in the terminal management table 1003. Change the operating status of to "Online (communicable)". At this time, the terminal state management unit 53 updates the reception date and time, and updates the IP address of the terminal 10 as necessary (step S24). Accordingly, the terminal management table 1003 includes the terminal ID “01aa” of the terminal 10A, the operation state “online (communicable)”, the reception date and time “20xx.4.1.10: 40”, and the IP address “10aa” of the terminal 10aa. "1.2.1.3" is managed in association with each other.

  Then, the transmission / reception unit 51 of the management system 50 transmits the authentication result information indicating the authentication result obtained by the terminal authentication unit 52 to the terminal 10A that is the request source terminal that has requested the login via the communication network 2. (Step S25). Here, a case where the terminal authentication unit 52 determines that the terminal has a valid use authority will be described below.

  The terminal extraction unit 54 of the management system 50 searches the destination list management table 1101 using the terminal ID “01aa” of the request source terminal (terminal 10A) that requested the login as a search key. As a result, the terminal extraction unit 54 extracts the terminal IDs of candidate destination terminals that can communicate with the request source terminal (terminal 10A) (step S26). Here, as an example, “01ab”, “01ba”, and “01db” are extracted as the terminal IDs of the destination terminals corresponding to the terminal ID “01aa” of the request source terminal (terminal 10A).

  Next, the terminal state acquisition unit 55 searches the terminal management table 1003 using the terminal IDs (“01ab”, “01ba”, “01db”) of the destination terminal candidates extracted by the terminal extraction unit 54 as search keys. To do. Thereby, each operation state of terminal ID ("01ab", "01ba", "01db") is acquired by reading an operation state for every terminal ID extracted by the terminal extraction part 54 (step S27).

  Next, the transmission / reception unit 51 sends the destination state information including the operation states of the destination terminal candidate terminal IDs (“01ab”, “01ba”, “01db”) to the request source terminal (terminal 10A). Transmit (step S28). As a result, the request source terminal (terminal 10A) grasps the current operating states of the terminal IDs (“01ab”, “01ba”, “01db”) of the destination terminal candidates of the request source terminal (terminal 10A). can do.

  Furthermore, the terminal extraction unit 54 of the management system 50 searches the destination list management table 1101 using the terminal ID “01aa” of the request source terminal (terminal 10A) that requested the login as a search key. As a result, the terminal extraction unit 54 extracts another request source terminal ID in which the terminal ID “01aa” of the request source terminal (terminal 10A) is registered as a destination terminal candidate (step S29). In the destination list management table 1101 shown in FIG. 11A, the terminal IDs of the other request source terminals to be extracted are “01ab”, “01ba”, and “01db”.

  Next, the terminal state acquisition unit 55 of the management system 50 searches the terminal management table 1003 using the terminal ID “01aa” of the request source terminal (terminal 10A) that has made the login request as a search key. Thereby, the terminal state acquisition unit 55 acquires the operating state of the request source terminal (terminal 10A) that has requested the login (step S30).

  Then, the transmission / reception unit 51 sets the operation state to “online (communicable)” in the terminal management table 1003 among the terminal IDs (“01ab”, “01ba”, “01db”) extracted in step S29. Terminal IDs (“01ba”, “01db”) are extracted. Further, the transmission / reception unit 51 sends the terminal ID “01aa” of the requesting terminal (terminal 10A) and the operation state “online (terminal 10) to the terminals 10B and 10C corresponding to the extracted terminal IDs (“ 01ba ”and“ 01db ”). Destination state information including "communicable" is transmitted (steps S31-1, 2).

  When the transmission / reception unit 51 transmits the destination status information to the terminals 10B and 10C, the IP address of the terminal managed in the terminal management table 1003 is set based on each terminal ID (“01ba”, “01db”). refer. As a result, the terminal ID “01aa” of the request source terminal (terminal 10A) and the operation status are respectively transmitted to the destination terminals (terminals 10B and 10C) that can communicate with the request source terminal (terminal 10A) that requested the login. Can communicate “online (communicable)”.

  On the other hand, in the other terminals 10 as well, for example, when the user turns on the power switch 109 shown in FIG. 5, the operation input receiving unit 12 shown in FIG. And the same processing as the processing in steps S22 to S31-1, 2 is performed.

(Communication processing)
16 and 17 are sequence diagrams illustrating an example of communication processing of the transmission system according to an embodiment. 16 and 17, it is assumed that various types of management information are transmitted and received through the management information session sei shown in FIG. Here, an example in which content data is transmitted between the terminal 10A and the terminal 10B will be described.

  In step S1601, upon receiving the selection operation of the destination terminal (terminal 10B) by the user of the terminal 10A, the terminal 10A transmits start request information requesting the management system 50 to start a session (step S1602). This start request information includes information such as the request source terminal ID of the terminal 10A that is the request source terminal, the destination terminal ID of the terminal 10B that is the destination terminal, and the service ID of the terminal 10A. Further, the start request information includes the IP address (request source IP address) of the terminal 10A.

  In step S1603, the terminal state management unit 53 of the management system 50 that has received the start request information from the terminal 10A, based on the terminal ID “01aa” of the request source terminal (terminal 10A) included in the start request information. Update. For example, the terminal state management unit 53 changes the operation state information corresponding to the terminal ID “01aa” of the terminal 10A to “online (during communication)” and updates the reception date information.

  In step S1604, the service ID acquisition unit 57b of the management system 50 extracts the service ID included in the start request information received from the terminal 10A.

  In step S1605, the service information management unit 57a of the management system 50 acquires the service content corresponding to the service ID of the terminal 10A acquired by the service ID acquisition unit 57a from the service management DB 5006. For example, the service information management unit 57a acquires service content information such as transmission quality and reception quality corresponding to the service ID of the terminal 10A from the service management table 1201 of FIG.

  In step S1606, the session control unit 56a of the management system 50 transmits start request information for requesting the start of the session to the terminal 10B that is the destination terminal. The start request information includes, for example, the request source terminal ID of the terminal 10A that is the request source terminal.

  In step S <b> 1607, the terminal 10 </ b> B that has received the start request information from the management system 50 transmits start response information to the management system 50. This start response information includes, for example, information such as the destination terminal ID of the terminal 10B and the service ID.

  In step S1608, the terminal state management unit 53 of the management system 50 that has received the start response information from the terminal 10B updates the terminal management DB 5003 based on the terminal ID “01ba” of the terminal 10B included in the start response information. For example, the terminal state management unit 53 changes the operation state information corresponding to the terminal ID “01ba” of the terminal 10B to “online (during communication)” and updates the reception date information.

  In step S1609, the service ID acquisition unit 57b of the management system 50 extracts the service ID included in the start response information received from the terminal 10B.

  In step S1610, the service information management unit 57a of the management system 50 acquires the service content corresponding to the service ID of the terminal 10B acquired by the service ID acquisition unit 57a from the service management DB 5006. For example, the service information management unit 57a acquires service content information such as transmission quality and reception quality corresponding to the service ID of the terminal 10B from the service management table 1201 of FIG.

  Note that, when content data is transmitted between three or more terminals 10, the management system 50 executes, for example, the processes of steps S 1706 to S 1709 for the third and subsequent terminals 10, and the service of each terminal 10. Service contents corresponding to the ID and terminal capability information are acquired.

  In step S1611, the service content extraction unit 57c and the service content determination unit 57d determine the service content of the session based on the service content of each terminal 10 acquired in steps S1605 and S1610 and the service priority management DB 5007. . A method for determining the service content of the session will be described later with reference to FIGS.

  In step S1612, the session control unit 56a of the management system 50 creates a session ID that is identification information for identifying a session.

  In step S1613, the session information management unit 56b records the created session ID in the session management DB 5005 in association with the request source terminal ID (terminal ID of the terminal 10A) and the destination terminal ID (terminal ID of the terminal 10B). To do.

  Next, the description of the communication process of the transmission system 1 will be continued with reference to FIG.

  In step S <b> 1614, the session control unit 56 a of the management system 50 transmits session information to the relay device 30. The session information includes, for example, the service ID such as the session ID created in step S1612 and the transmission quality and reception quality of the terminals 10A and 10B determined in step S1611.

  In step S1615, the service content management unit 33a of the relay device 30 that has received the session information transmitted from the management system 50 stores the service content of each terminal 10 included in the received session information in the service content management DB 3001, to manage.

  In step S <b> 1616, the quality setting unit 33 b of the relay device 30 sets the quality changing unit 32 of the relay device 30 based on the service content of each terminal 10 stored in the service content management DB 3001. Thereby, the quality changing unit 32 automatically converts the quality of the content transferred by the transmitting / receiving unit (transfer unit) 31 to each of the terminals 10A to 10C according to the quality stored in the service content management table 1401.

  In step S1617a, the session control unit 56a of the management system 50 transmits start instruction information for instructing the terminal 10A to start a session. Similarly, in step S1617b, the session control unit 56a of the management system 50 transmits start instruction information that instructs the terminal 10B to start a session. These start instruction information includes a session ID, which is identification information of the session, and service content information such as transmission quality and reception quality of each terminal 10.

  In step S1618a, the communication control unit 13 of the terminal 10A sets service contents (transmission quality and reception quality) included in the received start instruction information, and establishes a communication session (session sed) with the relay device 30. (Step S1619a). Similarly, in step S1618b, the communication control unit 13 of the terminal 10B sets the service content (transmission quality and reception quality) included in the received start instruction information, and communicates with the relay device 30 (session sed). Is established (step S1619b).

  Through the above processing, the terminals 10A and 10B can participate in the same communication session via the relay device 30 and transmit content data such as image data and sound data to each other.

  For example, the session established in FIGS. 16 and 17 is the session ID “se001” in the service content management table 1401 shown in FIG. 14, the terminal ID of the terminal 10A is “01aa”, and the terminal ID of the terminal 10B is “01ab”. The following explanation will be given.

  In step S1620, the terminal 10A transmits the content data (image data and sound data) to the relay device 30 at the transmission frame rate “20 fps”, the transmission image quality “medium resolution”, and the transmission sampling rate “22.05 kHz”.

  In step S1621, the relay device 30 that has received the content data from the terminal 10A converts the received content data quality of the content data by the quality changing unit 32 and transfers (relays) the content data to the terminal 10B by the transmission / reception unit (transfer unit) 31. )

  For example, according to the service content management table 1401 of FIG. 14, the terminal 10B (terminal ID01ab) can receive the 20 fps image transmitted from the terminal 10A (terminal ID01aa) as it is. Further, the terminal 10B can receive the sound data of the sampling rate 22.05 kHz transmitted from the terminal 10A as it is. On the other hand, since the reception image quality of the terminal 10B is “low resolution”, the image from the terminal 10A cannot be received as it is. In this case, the relay device 30 converts the “medium resolution” image received from the terminal 10A into a “low resolution” image, and transmits the converted image data to the terminal 10B (step S1622).

  Similarly, in step S <b> 1623, the terminal 10 </ b> B transmits the content data to the relay device at the transmission frame rate “30 fps”, the transmission image quality “medium resolution”, and the transmission sampling rate “22.05 kHz”.

  In step S1624, the relay device 30 that has received the content data from the terminal 10B converts the quality of the received content data by the quality changing unit 32, and transfers (relays) the content data to the terminal 10A by the transmission / reception unit (transfer unit) 31. )

  For example, according to the service content management table 1401 of FIG. 14, the terminal 10A (terminal ID01aa) can receive the 30 fps image transmitted from the terminal 10B (terminal ID01ab) as it is. Further, the terminal 10B can receive the sound data of the sampling rate 22.05 kHz transmitted by the terminal 10A as it is. On the other hand, since the reception image quality of the terminal 10A is “low resolution”, the image from the terminal 10B cannot be received as it is. In this case, the relay device 30 converts the “medium resolution” image received from the terminal 10B into a “low resolution” image, and transmits the converted image data to the terminal 10A (step S1625).

  Through the above processing, according to the transmission system 1 according to the present embodiment, in the transmission system 1 that transmits content data via the relay device 30, the service content of the session according to the service content of the terminal 10 is easily determined. Will be able to.

<Service content decision processing>
Here, the service content determination process of the session will be described. This process corresponds to step S1611 in FIG. Here, the case where the number of terminals 10 is three will be described. However, even if the number of terminals 10 is two or more, the same processing can be performed.

  FIG. 18 is a flowchart illustrating a flow of service content determination processing according to an embodiment.

  In step S1801, the service ID acquisition unit 57b of the management system 50 acquires the service ID of each terminal 10 participating in the session. This process corresponds to, for example, the processes in steps S1604 and S1609 in FIG. When the number of terminals 10 is three, the service ID acquisition unit 57b executes the processes of steps S1606 to S1609 in FIG. 16 for the third terminal 10, for example.

  In step S1802, the service information management unit 57a of the management system 50 acquires service content information such as transmission quality and reception quality corresponding to the service ID of each terminal 10 from the service management table 1201 included in the service management DB 5006. To do. This process corresponds to, for example, the processes in steps S1605 and S1610 in FIG.

  In step S1803, the service content extraction unit 57c of the management system 50 uses the transmission quality and reception that each terminal 10 can use in the session based on the transmission quality and reception quality corresponding to the acquired service ID of each terminal 10. Extract quality.

FIG. 19 is a diagram for explaining service content determination processing according to an embodiment. For example, as illustrated in FIG. 19, the terminals 10 participating in the session are assumed to be a terminal 10A, a terminal 10B, and a terminal 10C. Further, each terminal 10A for obtaining herein, 10B, 10C respectively _S A transmission _quality, S B, and _{S C,} reception quality of each _{R A,} R B, and _{R C.}

In this case, the service content extraction unit 57c transmits the transmission qualities S _A , S _B , S _C , and the reception quality R _{A of} each terminal 10A, 10B, 10C so as to satisfy the following expressions (1) to (4). R _B and R _C are obtained respectively.

For example, let C _rSA , C _rSB , and C _rSC be a discrete set indicating the reception quality of receivable content data based on the service IDs of the terminals 10A, 10B, and 10C. Similarly, let C _sSA , C _sSB , and C _sSC be a discrete set indicating the transmission quality of content data that can be transmitted based on the service IDs of the terminals 10A, 10B, and 10C. One element of these discrete sets corresponds to, for example, one row of the service management table 1201 shown in FIG.

For example, if the service ID of the terminal 10A is “sv901”, the elements of _CrSA include “reception frame rate 30 fps”, “reception frame rate 20 fps”, “reception image quality medium resolution”, “reception image quality low resolution”, “ “Reception sampling rate 44.1 kHz”, “Reception sampling rate 22.05 kHz” and the like are included. The elements of C _sSA include “transmission frame rate 20 fps”, “transmission frame rate 10 fps”, “transmission image quality medium resolution”, “transmission image quality low resolution”, “transmission sampling rate 44.1 kHz”, “transmission sampling rate”. 22.05 kHz "and the like are included.

The service content extraction unit 57c extracts the transmission qualities S _A , S _B , and S _C of the terminals 10A, 10B, and 10C participating in the session so as to be elements of the discrete sets C _sSA , C _sSB , and C _sSC , respectively. To do. This is expressed by the following equation (1).

これは、例えば、端末１０Ａの送信品質Ｓ_Ａを、端末１０ＡのサービスＩＤに対応する１つ以上の送信品質のいずれかを満たすように抽出することに相当する。

This corresponds to, for example, to extract transmit quality S _A terminal 10A, so as to satisfy any one or more of the transmission quality corresponding to the service ID of the terminal 10A.

In addition, the service content extraction unit 57c makes the reception qualities R _A , R _B , and R _C of the terminals 10A, 10B, and 10C participating in the session become elements of the discrete sets C _rSA , C _rSB , and C _rSC , respectively. To extract. This is expressed by the following equation (2).

これは、例えば、端末１０Ａの受信品質Ｒ_Ａを、端末１０ＡのサービスＩＤに対応する１つ以上の受信品質のいずれかを満たすように抽出することを示している。

This indicates, for example, that the reception quality _RA of the terminal 10A is extracted so as to satisfy one of the one or more reception qualities corresponding to the service ID of the terminal 10A.

Furthermore, service contents extracting unit 57c, each terminal 10A that join the session, 10B, 10C transmission quality _S A _of, S B, and _{S C,} respectively, the reception quality of other terminals 10 participating in the session equal to or more than the Extract as follows. This is expressed by the following equation (3).

例えば、図１９において、端末１０Ａは、コンテンツデータを送信品質Ｓ_Ａで中継装置３０に送信し、中継装置３０は、端末１０Ａから受信したコンテンツデータを、受信品質Ｒ_Ｂで端末１０Ｂに、受信品質Ｒ_Ｃで端末１０Ｃに転送するものとする。この場合、端末１０Ａの送信品質Ｓ_Ａは、端末１０Ｂの受信品質Ｒ_Ｂ、端末１０Ｃの受信品質Ｒ_Ｃと同等以上の品質となるように抽出することが望ましい。これは、端末１０Ａの送信品質Ｓ_Ａが、端末１０Ｂの受信品質Ｒ_Ｂ、端末１０Ｃの受信品質Ｒ_Ｃよりも低くなると、画質が劣化したり、中継装置３０の負荷が重くなる等の問題が発生するためである。

For example, in FIG. 19, the terminal 10A transmits the content data to the relay device 30 in the transmission quality _{S A,} the relay device 30, the content data received from the terminal 10A, the terminal 10B by the reception quality _{R B,} reception quality It is assumed that the data is transferred to the terminal 10C by _RC . In this case, transmission quality _{S A} of the terminal 10A, the reception quality _{R B} terminal 10B, it is desirable to extract as the reception quality _{R C} equal to or higher than the quality of a terminal 10C. This transmission quality _{S A} terminal 10A is, reception quality _{R B} terminal 10B, becomes lower than the reception quality _{R C} terminal 10C, or the image quality is degraded, the problem that the load of the relay device 30 is heavy This is because it occurs.

Furthermore, the service content extraction unit 57c has the reception qualities R _A , R _B , and R _C of the terminals 10A, 10B, and 10C participating in the session equivalent to the transmission qualities of the other terminals 10 that transmit content. Extract as follows. This is expressed by the following formula (4).

例えば、図１９において、端末１０Ｂはコンテンツデータを送信品質Ｓ_Ｂで中継装置３０に送信し、端末１０Ｃはコンテンツデータを送信品質Ｓ_Ｃで中継装置３０に送信するものとする。また、中継装置３０は、端末１０Ｂ、１０Ｃから受信したコンテンツデータを、受信品質Ｒ_Ａで端末１０Ａに転送するものとする。この場合、端末１０Ａの受信品質Ｒ_Ａは、端末１０Ｂの送信品質Ｓ_Ｂ、端末１０Ｃの送信品質Ｓ_Ｃと同等以下の品質となるように抽出することが望ましい。これは、端末１０Ａの受信品質Ｒ_Ａが、端末１０Ｂの送信品質Ｓ_Ｂ、端末１０Ｃの送信品質Ｓ_Ｃよりも高くなると、画質が劣化したり、中継装置３０の負荷が重くなる等の問題が発生するためである。

For example, in FIG. 19, the terminal 10B transmits the content data to the relay device 30 in the transmission quality _{S B,} the terminal 10C is assumed to be transmitted to the relay device 30 a content data transmission quality _{S C.} Further, it is assumed that the relay device 30 transfers the content data received from the terminals 10B and 10C to the terminal 10A with the reception quality _RA . In this case, the reception quality _{R A} of the terminal 10A, transmission quality _{S B} of the terminal 10B, it is desirable to extract so that transmission quality _{S C} equal to or less than the quality of a terminal 10C. This reception quality _{R A} of the terminal 10A, transmission quality _{S B} of the terminal 10B, becomes higher than the transmission quality _{S C} terminal 10C, or the image quality is degraded, the problem that the load of the relay device 30 is heavy This is because it occurs.

In step S1803 of FIG. 18, the service content extraction unit 57c of the management system 50 converts S _A , S _B , S _C , R _A , R _B , and R _C that satisfy the above formulas (1) to (4) into the session. The terminal 10 that participates in the process extracts the transmission quality and the reception quality that can be used in the session.

  In step S1804 of FIG. 18, the service content determination unit 57d of the management system 50 determines whether transmission quality and reception quality that can be used by each terminal 10 participating in the session have been extracted in step S1803. If there is no service content available for each terminal 10 in the session, the service content determination unit 57d moves to step S1805 and refuses to start communication. The case where there is no service content available for each terminal 10 in a session indicates that there are one or more terminals 10 from which transmission quality and reception quality available for the session are not extracted.

  On the other hand, when there is a service content that can be used by each terminal 10, the service content determination unit 57d shifts the process to step S1806.

  In step S1806, the service content determination unit 57d determines whether there is one service content that can be used by each terminal 10 extracted in step S1803. Here, for example, when the terminal 10A can use one service, the service content determination unit 57d determines the extracted service content (transmission quality and reception quality) as the service content of the terminal 10A in step S1808. To do. On the other hand, when there is not one service content that can be used by the terminal 10A (when there are a plurality of service contents), the service content determination unit 57d shifts the process to step S1907. The same applies to the other terminals 10B and 10C.

  In step S1807, the service content determination unit 57d uses the service priority management table 1301 included in the service priority management DB 5007 to extract the service content used by each terminal 10 from the available service content extracted. Determine the content. For example, the service content determination unit 57d determines the service content of the terminal A based on the information of the terminal A (service ID “sv901”) included in the service priority management table 1301 illustrated in FIG.

  For example, it is assumed that the transmission sampling rates of the terminal A extracted by the service content extraction unit 57c are two, “44.1 kHz” and “22.05 kHz”. In this case, the service content determination unit 57d prioritizes the lower sampling rate based on the service priority management table 1301, and determines “22.05 kHz” as the transmission sampling rate of the terminal A.

  Similarly, for example, it is assumed that the “reception frame rate” of the terminal A extracted by the service content extraction unit 57c is “30 fps” and “20 fps”. In this case, the service content determination unit 57d prioritizes “the higher reception frame rate” based on the service priority management table 1301, and determines “30 fps” as the reception frame rate of the terminal A.

  Through the above processing, the service content extraction unit 57c can use each terminal 10 in a session based on transmission quality information and reception quality information corresponding to service IDs of a plurality of terminals 10 participating in the session. Extract transmission quality and reception quality. Further, when there are a plurality of transmission quality and reception quality that can be used by the terminal 10 in the session, the service content determination unit 57d uses the service priority management DB 5007 to determine the transmission quality and reception quality (service content) of the terminal 10. decide.

  In addition, said Formula (1)-(4) is a suitable example, and according to a system request | requirement, a system configuration, etc., a formula can be added, deleted, or changed.

<Summary>
The transmission management system (50) according to an embodiment includes:
A transmission management system (50) for managing a session for transmitting content data via a relay device (30),
Service identification information for identifying service contents provided to each of a plurality of transmission terminals (10), and one or more transmission quality information and one or more reception quality information corresponding to the service identification information are managed. Service management means (57a) to perform,
Obtaining means (57b) for obtaining the service identification information of each of the transmission terminals (10) participating in the session;
Extraction means (57c) for extracting the transmission quality and the reception quality that can be used in the session by each of the transmission terminals (10) participating in the session based on the acquired service identification information;
Decision means (57d) for determining the transmission quality and the reception quality used by each of the transmission terminals (10) participating in the session from the extracted transmission quality and reception quality;
Have

  This provides a transmission management system (50) that makes it easy to determine the service content of a session based on transmission quality and reception quality that are permitted to be used by each transmission terminal (10) participating in the session. be able to.

  The reference numerals in the parentheses are given for ease of understanding, are merely examples, and do not limit the scope of the present invention.

[Supplement of Embodiment]
The relay device 30, the management system 50, etc. in the above embodiment may be constructed by a single computer, or may be constructed by a plurality of computers arbitrarily assigned by dividing each unit (function or means). good.

  10 and 11, the reception date and time are managed. However, the present invention is not limited to this, and at least the reception time of the reception date and time may be managed.

  Furthermore, in the above embodiment, the case of a video conference terminal has been described as an example of a transmission terminal. However, the present invention is not limited to this, and a telephone system such as an IP (Internet Protocol) telephone or an Internet telephone may be used. Moreover, a smart phone, a mobile phone, a car navigation terminal, a wearable computer, a monitoring camera, an electronic blackboard, a projector, a game machine, or an industrial device having a communication function may be used. The wearable computer includes a wristwatch, a head mounted display, and the like. Industrial equipment includes office equipment such as an MFP (Multifunction Peripheral / Printer / Product), medical equipment such as an endoscope, and agricultural equipment such as a cultivator.

  In the above embodiment, image data and sound data have been described as an example of content data. However, the present invention is not limited to this, and touch data may be used. In this case, the sense that the user touched on one terminal side is transmitted to the other terminal side. Further, the content data may be smell data. In this case, the odor (odor) on one terminal side is transmitted to the other terminal side. The content data may be at least one of image data, sound data, tactile data, and olfactory data.

1 Transmission system 10 Terminal (Transmission terminal)
13 Communication control unit (communication control means)
17 Storage / reading unit (reading means)
30 relay device 50 management system (transmission management system, information processing device)
56a Session control unit (session control means)
57a Service information management unit (service management means)
57b Service ID acquisition unit (acquisition means)
57c Service content extraction unit (extraction means)
57d Service content determination unit (determination means)
5006 Service Management DB
5007 Service priority management DB (service priority information)

JP 2008-227577 A Special table 2011-510539 gazette

Claims (10)

A transmission management system for managing a session for transmitting content data via a relay device,
Service management for managing service identification information for identifying service contents provided to each of a plurality of transmission terminals, and one or more transmission quality information and one or more reception quality information corresponding to the service identification information Means,
Obtaining means for obtaining the service identification information of each of the transmission terminals participating in the session;
Based on the acquired service identification information, an extraction unit that extracts the transmission quality and the reception quality that can be used in the session by each of the transmission terminals participating in the session;
Determining means for determining the transmission quality and the reception quality used by each of the transmission terminals participating in the session from the extracted transmission quality and reception quality;
A transmission management system. The extraction means includes
The transmission quality of one transmission terminal participating in the session is included in one or more transmission quality information corresponding to the service identification information of the one transmission terminal, and other transmission terminals participating in the session The transmission management system according to claim 1, wherein extraction is performed so as to be equal to or higher than reception quality. The extraction means includes
The reception quality of one transmission terminal participating in the session is included in one or more reception quality information corresponding to service identification information of the one transmission terminal, and other transmission terminals participating in the session The transmission management system according to claim 1 or 2, wherein extraction is performed so that the transmission quality is equal to or less than the transmission quality. The determining means includes
When there are a plurality of the extracted transmission qualities or reception qualities, the priority information is stored in advance for each quality item of the transmission quality or the reception quality in association with each service identification information. The transmission management system according to any one of claims 1 to 3, wherein the transmission quality and the reception quality used by each of the transmission terminals participating in the session are determined. The transmission quality and the reception quality are:
5. The transmission management system according to claim 1, comprising quality items of a frame rate, a bit rate, a resolution, an image quality, or a color depth of image data transmitted by the transmission terminal.   The session control means for notifying the transmission quality and the reception quality information determined by the determination means to a plurality of transmission terminals participating in the session and the relay apparatus. The transmission management system described in 1. A transmission management system according to claim 6;
A transmission terminal that participates in a session for transmitting and receiving content data via a relay device,
Reading means for reading out the service identification information from a recording medium on which service identification information for identifying service contents provided to the transmission terminal is recorded, and session control information including the read service identification information in the transmission management system Communication control means for establishing the session based on transmission quality and reception quality information notified from the transmission management system,
And a program to function as
Including transmission system. An information processing apparatus for managing a session for transmitting content data via a relay apparatus,
Service management for managing service identification information for identifying service contents provided to each of a plurality of transmission terminals, and one or more transmission quality information and one or more reception quality information corresponding to the service identification information Means,
Obtaining means for obtaining the service identification information of each of the transmission terminals participating in the session;
Based on the acquired service identification information, an extraction unit that extracts the transmission quality and the reception quality that can be used in the session by each of the transmission terminals participating in the session;
Determining means for determining the transmission quality and the reception quality used by each of the transmission terminals participating in the session from the extracted transmission quality and reception quality;
An information processing apparatus. A transmission management method by a transmission management system for managing a session for transmitting content data via a relay device,
Service identification information for identifying the service content provided to each of a plurality of transmission terminals by the transmission management system, one or more transmission quality information and one or more reception quality information corresponding to the service identification information And manage
The transmission management system is
Obtaining the service identification information of each of the transmission terminals participating in the session;
Based on the acquired service identification information, an extraction step of extracting the transmission quality and the reception quality that each of the transmission terminals participating in the session can use in the session;
A determination step of determining the transmission quality and the reception quality used by each of the transmission terminals participating in the session from the extracted transmission quality and reception quality;
Including a transmission management method.   A program for causing a computer to execute the transmission management method according to claim 9.

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