Video conference system, band control method, conference control device, video conference terminal device and recording medium recording program

• US 20100165072A1
• Filed: 12/22/2009
• Published: 07/01/2010
• Est. Priority Date: 12/29/2008
• Status: Active Grant

• Current Assignee: Brother Kogyo Kabushiki Kaisha
• Original Assignee: Brother Kogyo Kabushiki Kaisha
• Inventors: Oike, Kenji
• Granted Patent: US 8,416,280 B2
• Time in Patent Office: Days
• US Class Current: 348/14.90
• CPC Class Codes: H04L 12/1822 Conducting the conference, e.g. admission, detection, selection or grouping of participants, correlating users to one or more conference sessions, prioritising transmission
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/2416 Real-time traffic
• CPC Class Codes: H04L 47/38 by adapting coding or compression rate
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/762 triggered by the network
• CPC Class Codes: H04L 47/801 Real time traffic
• CPC Class Codes: H04L 47/806 Broadcast or multicast traffic
• CPC Class Codes: H04L 47/808 User-type aware
• CPC Class Codes: H04L 47/822 Collecting or measuring resource availability data
• CPC Class Codes: H04L 47/828 Allocation of resources per group of connections, e.g. per group of users
• CPC Class Codes: H04N 7/152 Multipoint control units therefor

Abstract

A conference control device includes: a communication processing unit which performs transmission/reception processing of conference information containing voice information and image information between the conference control device and a plurality of video conference terminal devices through a network; an information collecting unit which collects information on connection paths between the conference control device and the respective video conference terminal devices; a grouping unit which sorts the plurality of video conference terminal devices into a plurality of groups based on information on the connection paths collected by the information collecting unit; a band monitoring unit which monitors a use band of the communication processing unit in accordance with every group; and a bandwidth control unit which is, when the group having the use band of less than a predetermined value is detected by the band monitoring unit, controls the bandwidth of the video conference terminal devices belonging to the group.

Claims

1. A conference control device comprising:

a communication processing unit which is configured to perform transmission/reception processing of conference information containing voice information and image information between the conference control device and a plurality of video conference terminal devices through a network;

an information collecting unit which is configured to collect information on connection paths between the conference control device and the respective video conference terminal devices;

a grouping unit which is configured to sort the plurality of video conference terminal devices into a plurality of groups based on information on the connection paths collected by the information collecting unit;

a band monitoring unit which is configured to monitor a use band of the communication processing unit in accordance with every group; and

a bandwidth control unit which is configured to, when the presence of the group having the use band of less than a predetermined value is detected by the band monitoring unit, control the bandwidth of the video conference terminal devices which belong to the group.

2. The conference control device according to claim 1, wherein the conference control device further includes a priority memory unit which is configured to store priority in allocating the bandwidths to the respective video conference terminal devices, and

the bandwidth control unit is configured to allocate a small bandwidth to the video conference terminal device with low priority stored in the priority memory unit compared to a bandwidth of the video conference terminal device with high priority stored in the priority memory unit.

3. The conference control device according to claim 1, wherein the conference control device includes a priority decision unit which is configured to decide priority in allocating the bandwidths to the respective video conference terminal devices, and

the bandwidth control unit is configured to allocate a small bandwidth to the video conference terminal device with low priority decided by the priority decision unit compared to a bandwidth of the video conference terminal device with high priority decided by the priority decision unit.

4. The conference control device according to claim 3, wherein the priority decision unit is configured to decide the priority such that the larger a speech amount made by the user in the video conference terminal device, the higher the priority becomes based on voice information acquired from the respective video conference terminal devices through the communication processing unit.

5. The conference control device according to claim 3, wherein the conference information contains information on usages of the respective video conference terminal devices in the conference, and

the priority decision unit is configured to decide the priority of the respective video conference terminal device corresponding to the information on the usages acquired from the video conference terminal devices by the communication processing unit.

6. The conference control device according to claim 3, wherein the conference information contains information on the degree of importance of users of the respective video conference terminal devices in the conference, and

the priority decision unit is configured to decide the priority of the respective video conference terminal devices corresponding to the degree of importance of the users in the conference acquired from the video conference terminal devices by the communication processing unit.

7. The conference control device according to claim 1, wherein the conference control device further includes a priority setting unit which is configured to set priority corresponding to a kind of information contained in the conference information, and

the bandwidth control unit is configured to allocate a larger bandwidth to information with high priority set by the priority setting unit.

8. The conference control device according to claim 1, wherein the network is an IP network,

the information collecting unit is configured to collect IP addresses of the respective video conference terminal devices as information on the connection paths, and the grouping unit which is configured to determine a domain to which said each video conference terminal device belongs based on the IP addresses collected by the information collecting unit, and is configured to sort the video conference terminal devices which belong to the same domain into the same group.

9. The conference control device according to claim 1, wherein the network is an IP network,

the information collecting unit is configured to sequentially transmit a packet to the respective video conference terminal devices while increasing a value of TTL (Time to Live) whose numerical value is decreased corresponding to the number of routers which the packet passes, and

is configured to detect an IP address of the router present between the conference control device and said each video conference terminal device as information on the connection paths based on a response packet transmitted from the router when the TTL of the packet becomes O, and

the grouping unit allocates the respective video conference terminal devices into a plurality of groups based on the IP addresses collected by the information collecting unit.

10. The conference control device according to claim 1, wherein the bandwidth control unit is configured to control the bandwidth by changing a compression rate of the conference information.

11. A recording medium for recording a computer readable program, the program allowing the computer to execute the steps of:

performing transmission/reception processing of conference information containing voice information and image information between the computer and a plurality of video conference terminal devices through a network using a communication processing part;

collecting information on connection paths between the computer and the respective video conference terminal devices;

sorting the plurality of video conference terminal devices into a plurality of groups based on collected information on the connection paths;

monitoring a use band of the communication processing part in accordance with every group; and

controlling, when the group having the use band of less than a predetermined value is present, the bandwidth of the respective video conference terminal devices which belong to the group.

12. A band control method in a conference control device comprising the steps of:

performing transmission/reception processing of conference information containing voice information and image information between a conference control device and a plurality of video conference terminal devices through a network using a communication processing unit;

collecting information on connection paths between the conference control device and the respective video conference terminal devices;

sorting the plurality of video conference terminal devices into a plurality of groups based on collected information on the connection paths;

monitoring a use band of the communication processing unit in accordance with every group; and

controlling, when the group having the use band of less than a predetermined value is present, the bandwidth of the respective video conference terminal devices which belong to the group.

13. A video conference system comprising:

a plurality of video conference terminal devices; and

a conference control device which is connected to the video conference terminal devices through a network and is configured to control communication between the conference control device and the video conference terminal devices, wherein the conference control device comprises;

a communication processing unit which is configured to perform transmission/reception processing of conference information containing voice information and image information between the conference control device and the video conference terminal devices through a network;

an information collecting unit which is configured to collect information on connection paths between the conference control device and the respective video conference terminal devices;

a grouping unit which is configured to sort the plurality of video conference terminal devices into a plurality of groups based on information on the connection paths collected by the information collecting unit;

a band monitoring unit which is configured to monitor a use band of the communication processing unit in accordance with every group; and

a bandwidth control unit which is configured to, when the presence of the group having the use band of less than a predetermined value is detected by the band monitoring unit, control the bandwidth of the video conference terminal devices which belong to the group.

14. A video conference terminal device in a video conference system which is connected to a plurality of video conference terminal devices through a network and performs conference communication between the video conference terminal devices, the video conference terminal device comprising:

a communication processing unit which is configured to perform transmission/reception processing of conference information containing voice information and image information between the video conference terminal device which constitutes an own device and a video conference terminal device which constitutes a communication partner through the network;

an information collecting unit which collects information on connection paths between the own device and the video conference terminal device which constitutes the communication partner;

a grouping unit which is configured to sort the plurality of video conference terminal devices into a plurality of groups based on information on the connection paths collected by the information collecting unit;

a band monitoring unit which is configured to monitor a use band of the group which includes the own device out of the groups formed by grouping; and

a bandwidth control unit which is configured to, when the presence of the group having the use band of less than a predetermined value is detected by the band monitoring unit, control a bandwidth of the communication processing unit or a bandwidth of the video conference terminal devices which belong to the group to which the own device belongs.