Method of and apparatus for providing reserved bandwidth to ethernet devices over switched ethernet including a home network wall plate having a combined IEEE 1394 and ethernet modified hub

• US 20030133476A1
• Filed: 01/22/2003
• Published: 07/17/2003
• Est. Priority Date: 02/26/2001
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Eyer, Mark Kenneth, Stone, Glen David, Smyers, Scott David, Fairman, Bruce Alan
• Granted Patent: US 7,463,647 B2
• Time in Patent Office: Days
• US Class Current: 370/537
• CPC Class Codes: G06F 13/4022 using switching circuits, e.g. switching matrix, connection or expansion network G06F13/4009 takes precedence

Abstract

A combined IEEE 1394-2000 and ethernet network allows devices on the network to operate according to both the IEEE 1394-2000 protocol and the ethernet protocol. The devices within the network are able to send IEEE 1394-2000 ischronous data, IEEE 1394-2000 asynchrounous data and ethernet data. Both IEEE 1394-2000 and ethernet devices within the network are coupled to modified hubs (MHUBS) to form a local cluster. The MHUBS are coupled to an ethernet switch which controls communications between devices in different local clusters. The ethernet switch and the MHUBS obey an ischronous interval in which all isochronous data transfers and asynchronous data transfers from ethernet devices with an allocation of reserved bandwidth will be allowed. Preferably, on a regular and reoccurring period, the ethernet switch sends an isotick signal to begin the ischronous interval. Any bandwidth left after the ischronous interval is then allocated to the IEEE 1394-2000 asynchronous traffic, until the start of the next ischronous interval.

Claims

1. A method of transmitting data within a network including one or more of a first type of device operating according to a first protocol and a second protocol and one or more of a second type of device operating according to only the second protocol comprising:

a. establishing a periodic cycle including a first portion and a second portion;

b. allowing only transmissions from the first type of devices according to the first protocol and transmissions from the second type of devices according to the second protocol during the first portion; and

c. allowing only transmissions from the first type of devices according to the second protocol during the second portion.

2. The method as claimed in claim 1 wherein devices of the first type and devices of the second type communicate with each other within the network.

3. The method as claimed in claim 2 further comprising converting the transmissions into a format understood by a receiving device.

4. The method as claimed in claim 1 wherein a duration of the first portion is dependent on a number of active streams of the first protocol and a number of the second type of devices within the network.

5. The method as claimed in claim 1 further comprising establishing an active stream of the first protocol within the network and guaranteeing first protocol bandwidth to the active stream.

6. The method as claimed in claim 5 further comprising reserving second protocol bandwidth for each one of the second type of devices.

7. The method as claimed in claim 1 wherein transmissions from the first type of device in the first protocol are prioritized during the first portion over transmissions from the second type of device in the second protocol.

8. The method as claimed in claim 1 wherein transmissions from the second type of device in the second protocol are prioritized during the first portion over transmissions from the first type of device in the first protocol.

9. The method as claimed in claim 1 wherein the first type of device operates according to IEEE 1394 protocol and the second type of device operates according to ethernet protocol.

10. The method as claimed in claim 1 wherein the first protocol is isochronous capable and the second protocol is asynchronous.

11. The method as claimed in claim 1 further comprising analyzing a format of data to be sent by each of the second type of devices and reserving second protocol bandwidth for each of the second type of devices if the format is of a predetermined type.

12. A modified hub device configured for coupling between two or more devices operating according to two or more different protocols and a switching device, the hub device comprising:

a. a first interface configured for coupling to and communicating with one or more of a first type of device operating according to a first protocol and a second protocol;

b. a second interface configured for coupling to and communicating with one or more of a second type of device operating according to only the second protocol; and

c. a third interface configured for coupling to and communicating with the switching device, wherein the switching device sends a periodic signal which signals the start of a period having a first portion and a second portion, wherein only communications from the first type of devices operating in the first protocol and communications from the second type of devices operating in the second protocol are allowed during the first portion, and only communications from the first type of devices operating in the second protocol are allowed during the second portion.

13. The modified hub device as claimed in claim 12 wherein devices of the first type and devices of the second type communicate with each other.

14. The modified hub device as claimed in claim 12 further comprising a conversion circuit coupled to the first interface, the second interface and the third interface for converting transmissions into a format understood by a receiving device.

15. The modified hub device as claimed in claim 12 wherein a duration of the first portion is dependent on a number of active streams of the first protocol and a number of the second type of devices.

16. The modified hub device as claimed in claim 12 wherein the modified hub device communicates with the switching device to establish an active stream of the first protocol involving a device of the first type coupled to the hub device and further wherein appropriate bandwidth for the active stream is guaranteed when the active stream is established.

17. The modified hub device as claimed in claim 16 wherein the modified hub device communicates with the switching device to reserve second protocol bandwidth for communications involving a device of the second type coupled to the modified hub device.

18. The modified hub device as claimed in claim 12 wherein the modified hub device communicates with the switching device to establish an active stream of the first protocol involving a device of the first type coupled to the hub device and to assign a label corresponding to the active stream.

19. The modified hub device as claimed in claim 12 wherein the first type of device operates according to IEEE 1394 protocol and the second type of device operates according to ethernet protocol.

20. The modified hub device as claimed in claim 12 wherein the first protocol is isochronous and the second protocol is asynchronous.

21. The modified hub device as claimed in claim 12 wherein communications from the first type of device in the first protocol are prioritized during the first portion over communications from the second type of device in the second protocol.

22. The modified hub device as claimed in claim 12 wherein communications from the second type of device in the second protocol are prioritized during the first portion over communications from the first type of device in the first protocol.

23. The modified hub device as claimed in claim 12 wherein the switching device is configured for coupling to a remote network of devices thereby providing a wide area network.

24. The modified hub device as claimed in claim 12 wherein the modified hub device analyzes a format of data to be sent by each of the second type of devices and reserves second protocol bandwidth for each of the second type of devices if the format is of a predetermined type.

25. A switching device configured for coupling to two or more hub devices providing interfaces to one or more of a first type of device operating according to a first protocol and a second protocol and one or more of a second type of device operating according to only the second protocol, the switching device comprising:

a. a plurality of ports, each port coupled to a corresponding hub device for interfacing with devices coupled to the corresponding hub device; and

b. a control circuit coupled to the plurality of ports for sending a periodic signal which signals the start of a period having a first portion and a second portion, wherein only communications from the first type of devices operating in the first protocol and communications from the second type of devices operating in the second protocol are allowed during the first portion, and only communications from the first type of devices operating in the second protocol are allowed during the second portion.

26. The switching device as claimed in claim 25 wherein devices of the first type and devices of the second type communicate with each other.

27. The switching device as claimed in claim 25 wherein a duration of the first portion is dependent on a number of active streams of the first protocol and a number of the second type of devices.

28. The switching device as claimed in claim 25 wherein the switching device communicates with the hub devices to establish an active stream of the first protocol involving a device of the first type and further wherein appropriate bandwidth for the active stream is guaranteed when the active stream is established.

29. The switching device as claimed in claim 28 wherein the switching device communicates with the hub devices to reserve second protocol bandwidth for communications involving a device of the second type coupled to a hub device.

30. The switching device as claimed in claim 25 wherein the switching device communicates with the hub devices to establish an active stream of the first protocol involving a device of the first type and to assign a label corresponding to the active stream.

31. The switching device as claimed in claim 25 wherein the first type of device operates according to IEEE 1394 protocol and the second type of device operates according to ethernet protocol.

32. The switching device as claimed in claim 25 wherein the first protocol is isochronous capable and the second protocol is asynchronous.

33. The switching device as claimed ill claim 25 wherein communications from the first type of device in the first protocol are prioritized during the first portion over communications from the second type of device in the second protocol.

34. The switching device as claimed in claim 25 wherein communications from the second type of device in the second protocol are prioritized during the first portion over communications from the first type of device in the first protocol.

35. The switching device as claimed in claim 25 further comprising a remote interface circuit configured for coupling to a remote network of devices thereby providing a wide area network.

36. The switching device as claimed in claim 25 wherein the switching device communicates with the hub devices to analyze a format of data to be sent by each of the second type of devices and reserve second protocol bandwidth for each of the second type of devices if the format is of a predetermined type.

37. A network of devices comprising:

a. a switching device including;

i. a plurality of ports; and

ii. a control circuit coupled to the plurality of ports for sending a periodic signal which signals the start of a period having a first portion and a second portion; and

b. a plurality of modified hub devices each including;

i. a first interface configured for coupling to and communicating with one or more of a first type of device operating according to a first protocol and a second protocol;

ii. a second interface configured for coupling to and communicating with one or more of a second type of device operating according to only the second protocol; and

iii. a third interface coupled to a corresponding one of the plurality of ports,

wherein only communications from the first type of devices operating in the first protocol and communications from the second type of devices operating in the second protocol are allowed during the first portion, and only communications from the first type of devices operating in the second protocol are allowed during the second portion.

38. The network of devices as claimed in claim 37 wherein devices of the first type and devices of the second type communicate with each other.

39. The network of devices as claimed in claim 37 wherein each of the modified hub devices further comprise a conversion circuit coupled to the first interface, the second interface and the third interface for converting transmissions into a format understood by a receiving device.

40. The network of devices as claimed in claim 37 wherein a duration of the first portion is dependent on a number of active streams of the first protocol and a number of second type of devices.

41. The network of devices as claimed in claim 37 wherein each of the modified hub devices communicate with the switching device to establish an active stream of the first protocol involving a device of the first type coupled to the hub device and further wherein appropriate bandwidth for the active stream is guaranteed when the active stream is established.

42. The network of devices as claimed in claim 41 wherein each of the modified hub devices communicate with the switching device to reserve second protocol bandwidth for communications involving a device of the second type coupled to a hub device.

43. The network of devices as claimed in claim 37 wherein each of the modified hub devices communicate with the switching device to establish an active stream of the first protocol involving a device of the first type coupled to the hub device and to assign a label corresponding to the active stream.

44. The network of devices as claimed in claim 37 wherein the first type of device operates according to IEEE 1394 protocol and the second type of device operates according to ethernet protocol.

45. The network of devices as claimed in claim 37 wherein the first protocol is isochronous capable and the second protocol is asynchronous.

46. The network of devices as claimed in claim 37 wherein communication from the first type of device in the first protocol are prioritized during the first portion over communications from the second type of device in the second protocol.

47. The network of devices as claimed in claim 37 wherein communications from the second type of device in the second protocol are prioritized during the first portion over communications from the first type of device in the first protocol.

48. The network of devices as claimed in claim 37 wherein the switching device further comprises a remote interface circuit configured for coupling to a remote network of devices thereby providing a wide area network.

49. The network of devices as claimed in claim 37 wherein each of the modified hub devices communicate with the switching device to analyze a format of data to be sent by each of the second type of devices and reserve second protocol bandwidth for each of the second type of devices if the format is of a predetermined type.