Method and system for proxy A/V bridging on an ethernet switch

• US 8,077,617 B2
• Filed: 02/27/2008
• Issued: 12/13/2011
• Est. Priority Date: 05/14/2007
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Teener, Michael Johas
• Primary Examiner(s): Shah, Chirag
• Assistant Examiner(s): YOUNG, STEVE R
• Application Number:
  US12/038,099
• Publication Number:
  US 20080285574A1
• Time in Patent Office: 1,385 Days
• Field of Search: None
• US Class Current: 370/232
• CPC Class Codes: G09G 2370/10 Use of a protocol of communication by packets in interfaces along the display data pipeline
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: H04L 12/2805 Home Audio Video Interoperability [HAVI] networks
• CPC Class Codes: H04L 12/2816 Controlling appliance services of a home automation network by calling their functionalities arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station; in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom H04Q9/00
• CPC Class Codes: H04L 2012/2849 Audio/video appliances
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• CPC Class Codes: H04N 21/43632 involving a wired protocol, e.g. IEEE 1394 high-speed IEEE 1394 serial bus H04L12/40052
• CPC Class Codes: H04N 21/6373 for rate control , e.g. request to the server to modify its transmission rate flow control in packet networks H04L47/10
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 7/106 for domestic distribution
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: Y02D 30/00 Reducing energy consumption in communication networks

Abstract

Aspects of a system for proxy A/V bridging on an Ethernet switch may include an AV switch enables reception of incoming PDUs from a legacy device via an AV block network, wherein each incoming PDU contains an AV stream identifier (which consists of a destination address and may also consist of a traffic class designation and/or higher level protocol identifiers). The destination address may identify a destination AV device within the AV block network. The AV switch may enable generation of outgoing PDUs by inserting or modifying a corresponding traffic class designation within each of the incoming PDUs. The AV switch may enable transmission using a specific traffic shaping process of each of the outgoing PDUs to a destination AV device within the AV block network based on the AV stream identifier and corresponding QoS parameters.

Claims

1. A method for communicating data, the method comprising:

in a first communication device;

receiving a one or more link discovery messages via a port;

labeling said port based on the contents of said received one or more link discovery messages; and

determining whether said first communication device may utilize AV Bridging (AVB) services for transmitting and/or receiving protocol data units via said port based on said labeling and based on a quantity of second communication devices that are reachable via said port, wherein;

said port is labeled as a legacy port when said received one or more link discovery messages indicate that a said second communication device reachable via said port is not AVB-enabled; and

said first communication device is enabled to utilize said AV Bridging services via said port when said received one or more link discovery messages comprise a proxy request.

2. The method according to claim 1, wherein said port is labeled as a proxy enabled port when said received one or more link discovery messages comprise a proxy request.

3. The method according to claim 2, wherein a single said second communication device transmits and/or receives said protocol data units via said labeled proxy enabled port.

13. The method according to claim 1, wherein, if said port is labeled as a legacy port, said first communication device performs the following upon receiving, via said port, at least one protocol data unit of a data stream being communicated between a second communication device and a third communication device:

generating a traffic class designation for said data stream; and

inserting said traffic class designation within one or more protocol data units of said data stream prior to transmitting said one or more protocol data units.

14. The method according to claim 1, comprising:

receiving, via said port, at least one protocol data unit of a data stream being communicated between a second communication device and a third communication device;

generating quality of service (QoS) parameters for said data stream; and

sending one or more messages to reserve network resources for communicating said data stream, wherein said network resources are determined based on said quality of service parameters.

15. The method according to claim 14. wherein said one or more messages are generated and transmitted in accordance with the Stream Reservation Protocol or the Multiple Multicast Reservation Protocol.

16. The method according to claim 14, comprising:

estimating timing jitter of said data stream; and

adjusting said generated QoS parameters based on said estimated timing jitter.

4. A system for communicating data, the system comprising:

one or more circuits for use in a first communication device, wherein said one or more circuits enable;

reception of one or more link discovery messages via a port;

labeling of said port based on the contents of said received one or more link discovery messages; and

determination of whether said first communication device may utilize AV Bridging (AVB) services for transmitting and/or receiving protocol data units via said port based on said labeling and based on a quantity of second communication devices that are reachable via said port, wherein;

said port is labeled as a legacy port when said received one or more link discovery messages indicate that a said second communication device reachable via said port is not AVB-enabled; and

said communication device is enabled to utilize said AV Bridging services via said port when said received one or more link discovery messages comprise a proxy request.

5. The system according to claim 4, wherein said port is labeled as a proxy enabled port when said received one or more link discovery messages comprise a proxy request.

6. The system according to claim 5, wherein a single said second communicating device transmits and/or receives said protocol data units via said labeled proxy enabled port.

17. The system according to claim 4, wherein, if said port is labeled as a legacy port, said first communication device performs the following upon receiving, via said port, at least one protocol data unit of a data stream being communicated between a second communication device and a third communication device:

generating a traffic class designation for said data stream; and

inserting said traffic class designation within one or more protocol data units of said data stream prior to transmitting said one or more protocol data units.

18. The system according to claim 4, wherein said one or more circuits enable:

receiving, via said port, at least one protocol data unit of a data stream being communicated between a second communication device and a third communication device;

generating quality of service (QoS) parameters for said data stream; and

sending one or more messages to reserve network resources for communicating said data stream, wherein said network resources are determined based on said quality of service parameters.

19. The system according to claim 18. wherein said one or more messages are generated and transmitted in accordance with the Stream Reservation Protocol or the Multiple Multicast Reservation Protocol.

20. The system according to claim 18, comprising:

estimating timing jitter of said data stream; and

adjusting said generated QoS parameters based on said estimated timing jitter.

7. A method for communicating data, the method comprising:

receiving a link discovery message via a port;

labeling said port based on the contents of said received link discovery message; and

determining whether a communication device may utilize AV Bridging services for transmitting and/or receiving protocol data units via said port based on said labeling, wherein;

said port is labeled as a legacy port when said link discover message does not comprise a time-synchronization-enabled attribute and an AV-enabled attribute; and

said communication device is enabled to utilize said AV Bridging services via said port when said link discovery message comprises a proxy request attribute and when said port is labeled as said legacy port.

8. The method according to claim 7, wherein said port is labeled as a proxy enabled port when said link discovery message comprises said proxy request attribute.

9. The method according to claim 8, wherein a single said communication device transmits and/or receives said protocol data units via said labeled proxy enabled port.

10. A system for communicating data, the system comprising:

one or more circuits that enable reception of a link discovery message via a port;

said one or more circuits enable labeling of said port based on the contents of said received link discovery message; and

said one or more circuits enable determination of whether a communication device may utilize AV Bridging services for transmitting and/or receiving protocol data units via said port based on said labeling, wherein;

wherein said port is labeled as a legacy port when said link discover message does not comprise a time-synchronization-enabled attribute and an AV-enabled attribute; and

said communication device is enabled to utilize said AV Bridging services via said port when said link discovery message comprises a proxy request attribute and when said port is labeled as said legacy port.

11. The system according to claim 10, wherein said port is labeled as a proxy enabled port when said link discovery message comprises said proxy request attribute.

12. The system according to claim 11, wherein a single said communication device transmits and/or receives said protocol data units via said labeled proxy enabled port.