Local area-networked system having intelligent traffic control and efficient bandwidth management

• US 7,529,263 B1
• Filed: 01/16/2003
• Issued: 05/05/2009
• Est. Priority Date: 01/19/2002
• Status: Expired due to Fees

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Ucentric Systems, Inc. (Motorola Solutions, Inc.)
• Inventors: Zhang, Jinyou, Vasilevsky, Alexander D., Ruszczyk, Chester, Sparrell, Carlton J.
• Primary Examiner(s): MARCELO, MELVIN C
• Application Number:
  US10/345,870
• Time in Patent Office: 2,301 Days
• Field of Search: 370/422, 370/229, 370/395.41, 370/395.42, 370/395.43, 370/230, 370/230.1, 370/445, 370/437, 709/203
• US Class Current: 370/437
• CPC Class Codes: H04L 12/2834 Switching of information between an external network and a home network access arrangements H04L12/2856
• CPC Class Codes: H04L 12/2838 Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths adaptations of television systems for transmission by electric cable for domestic distribution H04N7/106; hybrid transport H04L12/6418; home network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 2012/2849 Audio/video appliances
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/13 in a LAN segment, e.g. ring or bus
• CPC Class Codes: H04L 47/2475 for supporting traffic characterised by the type of applications
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A centralized interactive TV recording and reproduction system linking several “Quality of Service” (QoS) reproduction and control units (such as television and audio reproduction receivers), as well as high bandwidth non-QoS legacy devices such as PCs, via a Home Area Network (HAN) to a centralized media server, has novel traffic control to prevent non-QoS devices from establishing and maintaining high-bandwidth network connections during the real-time transmission of media (video and/or audio) information from the media server to the QoS devices. In the preferred embodiment, the media server also contains a gateway device for connecting the HAN to a Wide Area Network, Metropolitan Area Network, and/or the Internet, and the media server also receives video and audio signals from sources such as cable, satellite, terrestrial broadcast, etc. The media server also contains a network router. All traffic from non-QoS devices is routed through the media server, and the media server limits the delivery of packets sent from source non-QoS devices to destination non-QoS devices. As a further refinement to prevent interruptions in real-time transmissions of video and audio information to QoS devices, the information can be buffered at the QoS device level.

Claims

1. A system for localized distribution of information, including media content, said localized information distribution system comprising:

a local area network;

first and second non-QoS devices coupled to said local area network, wherein said first and second non-QoS devices are operative to transmit and receive media content and other information using high bandwidth;

a media server coupled to said local area network that is operative to couple one or more external information sources to said local area network,

wherein said media server is further operative to control all communications between said first and second non-QoS devices and between either first or second non-QoS device and an external non-QoS device by routing such communications through said media server such that said first and second non-QoS devices are prohibited from directly communicating with one another and with the external non-QoS device over said local area network.

2. The localized information distribution system of claim 1 wherein said media server is further operative to control communications between said first and second non-QoS devices and between either the first or second non-QoS device and the external non-QoS device by limiting the bandwidth for communications to or from the first or second non-QoS device.

3. The localized information distribution system of claim 1 wherein first and second QoS devices are operative to communicate directly with one an other such that communications between first and second QoS devices are not required to pass through said media server.

4. The localized information distribution system of claim 1 wherein said media server includes a memory for storing media content received and processed by said media server.

5. The localized information distribution system of claim 4 wherein said memory is a high-capacity hard disk.

6. The localized information distribution system of claim 4 wherein said media server includes a video manager operative to control writing of media content to said memory for storage thereof and reading of stored media content from said memory for distribution thereof to either the first or second QoS device.

7. The localized information distribution system of claim 1 wherein said media server includes a gateway for coupling the one or more external information sources to said local area network.

8. The localized information distribution system of claim 1 wherein said media server includes a router for controlling distribution of information, including media content, in said local area network, wherein all communications between first and second non-QoS devices and between either the first or second non-QoS device and an external non-QoS device is routed through said router.

9. The localized information distribution system of claim 3 wherein said media server includes the Carrier Sense Multiple Access with Collision Detection protocol for managing the distribution of information, including media content, between said media server and the first and second QoS devices.

10. The localized information distribution system of claim 3 wherein said media server includes the Carrier Sense Multiple Access with Collision Avoidance protocol for managing the distribution of information, including media content, between said media server and the first and second QoS devices.

11. The localized information distribution system of claim 3 wherein first QoS device is operative to communicate directly with the first non-QoS device but the first non-QoS device cannot communicate directly with first QoS device.

12. The localized information distribution system of claim 3 wherein said media server includes a rate limiter operative to limit bandwidth of non-QoS communications to bandwidth available after bandwidth for QoS communications has been assigned.

13. The localized information distribution system of claim 3 wherein the first QoS devices is a media proxy device that is operative to communicate directly with the first or second non-QoS device when such communications are within bandwidth limits established by said media server, and is further operative to redirect communications with either the first or the second non-QoS device through said media server when such communications exceed bandwidth limits established by said media server.

14. The localized information distribution system of claim 1 wherein said media server is operative to block communications between first and second non-QoS devices and between either the first or the second non-QoS device and an external non-QoS device that exceeds communication bandwidth limits established by said media server for communications between such devices.

15. The localized information distribution system of claim 14 wherein said media server is operative to provide a perceptible alert whenever said media server blocks communications between non-QoS devices.

16. The localized information distribution system of claim 3 wherein each of first and second QoS devices is operative to buffer received information, including media content.

17. The localized information distribution system of claim 1 wherein said media server includes a rate limiter operative to limit bandwidth of non-QoS communications to bandwidth available after bandwidth for QoS communications has been assigned, and one or more QoS queues, and wherein communications to and from a first and second QoS devices are routed directly to and from said one or more QoS queues, bypassing said rate limiter, and wherein communications to and from the first and second non-QoS devices are routed to and from said rate limiter prior to being routed to said one or more QoS queues.

18. The localized information distribution system of claim 1, wherein said local area network is a home area network.

19. A method for locally distributing information, including media content, said method comprising:

receiving and storing media content from one or more external information sources in a media server that is reproducible by a first QoS devices;

distributing stored media content in a reproducible format from the media server to the first QoS;

controlling all communications between first and second non-QoS devices and between either the first or second non-QoS devices and an external non-QoS device by routing such communications through the media server by limiting bandwidth for communications transmitted to or received by either the first or second non-QoS devices, thereby avoiding network collisions with the distribution of the stored media content.

20. The method of claim 19, further comprising:

buffering received information, including media content, in first QoS device.

21. The method of claim 19, further comprising:

using a rate limiter to limit bandwidth of communications between said non-QoS devices and between any said non-QoS device and an external QoS device to bandwidth available after bandwidth for communications between QoS devices is assigned by said media server.

22. The method of claim 19, further comprising managing the distribution of information, including media content, between said media server and first QoS device using Carrier Sense Multiple Access with Collision Detection.

23. The method of claim 19, further comprising managing the distribution of information, including media content, between said media server and said networked QoS device using Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA).

24. The method of claim 19, further comprising:

configuring the first QoS device as a media proxy device;

directly routing communications between said media proxy device and either the first or second non-QoS device when such communications are within bandwidth limits established by said media server; and

redirecting communications between said media proxy device and either the first or second non-QoS device through said media server when such communications exceed bandwidth limits established by said media server.

25. The method of claim 19, further comprising:

blocking communications between the first and second non-QoS devices and between the first QoS device and an external non-QoS device that exceed bandwidth limits established by said media server for communications between such devices.

26. The system of claim 19, further comprising:

providing perceptible alert whenever said media server blocks communications between the first and second non-QoS devices.