Method and system for adjusting isochronous bandwidths on a bus

• US 6,539,450 B1
• Filed: 03/18/2000
• Issued: 03/25/2003
• Est. Priority Date: 11/29/1998
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Shima, Hisato, Hunter, David, Fairman, Bruce, James, David V.
• Primary Examiner(s): Wong, Peter
• Assistant Examiner(s): PHAN, RAYMOND NGAN
• Application Number:
  US09/531,075
• Time in Patent Office: 1,102 Days
• Field of Search: 710/129, 710/128, 710/33, 710/34, 710/35, 710/58, 710/59-61, 710/126, 710/127, 710/305-307, 710/310, 710/311, 710/312, 710/313, 709/231, 709/232, 709/233-235, 709/238-240, 709/246, 713/501-503
• US Class Current: 710/306
• CPC Class Codes: H04L 12/40058 Isochronous transmission
• CPC Class Codes: H04L 12/40065 Bandwidth and channel allocation home automation networks H04L12/2803; flow control H04L47/10
• CPC Class Codes: H04L 41/0896 Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities flow or congestion control using dynamic resource allocation, e.g. in-call renegotiation, H04L47/76

Abstract

A method and system for adjusting the bandwidth allocated for isochronous data traffic on an interconnected data bus is disclosed. The present system uses an isochronous resource manager (IRM) to sense a bandwidth change request from a talker. The IRM instigates a bandwidth adjustment associated with the bandwidth change request to one or more bus bridge portals.

Claims

1. A method of adjusting the bandwidth allocated for isochronous data traffic on interconnected data buses, comprising:

sensing a bandwidth change request from a talker by an isochronous resource manager (IRM); and

instigating a bandwidth adjustment associated with the bandwidth change request from the IRM to one or more bus bridge portals.

2. The method of claim 1, further comprising:

modifying the bandwidth change request in the one or more bus bridge portals, wherein channel assignments and connections are maintained.

3. The method of claim 1, wherein one or more controllers modify bandwidth allocations associated with the bandwidth change request.

29. The system of claim 1, wherein one or more controllers modify bandwidth allocations associated with the bandwidth change request.

4. A method of adjusting the bandwidth allocated for isochronous data traffic on interconnected data buses, comprising:

providing a bandwidth change request via a talker bus bridge portal from a talker to an isochronous resource manager (IRM); and

providing the bandwidth change request from the IRM to one or more bus bridge portals, wherein at least one of the one or more bus bridge portals is a listener portal and at least one of the one or more bus bridge portals is an intermediary portal.

5. The method of claim 4, further comprising providing the bandwidth change request from the listener portal and one or more listener controllers.

6. The method of claim 4, wherein the data buses are substantially compatible with the IEEE 1394 serial bus standard.

7. The method of claim 4, wherein the talker bus bridge portal provides the bandwidth change request for the talker.

8. The method of claim 7, further comprising providing the bandwidth change request from the talker portal to the one or more intermediary portals.

9. The method of claim 8, further comprising informing one or more intermediary controllers associated with the one or more intermediary portals of the bandwidth change request.

10. The method of claim 9, wherein one of the one or more intermediary portals is the listener portal that informs the listener controller of the bandwidth change request.

11. The method of claim 10, wherein the listener controller returns a confirmation message to the talker.

12. A bus bridge interconnect, comprising:

an isochronous resource manager (IRM) associated with a talker; and

a plurality of bus bridge portals to accept bandwidth change requests from the IRM;

wherein the IRM signals a bandwidth change request to the plurality of bus bridge portals.

13. The system of claim 12, wherein the data bus is substantially compatible with the IEEE 1394 serial bus standard.

14. The system of claim 12, wherein the talker provides the IRM with a bandwidth change request.

15. The system of claim 12, wherein the bus bridge portal is a talker portal that provides the bandwidth change request for the talker.

16. The system of claim 15, wherein at least one of the plurality of bus bridge portals is an intermediary portal connected with the talker portal.

17. The system of claim 16, further comprising one or more intermediary controllers connected with the at least one intermediary portal.

18. The system of claim 17, further comprising a listener portal connected with the at least one intermediary portal.

19. The system of claim 12, further comprising a listener controller connected with a listener portal, wherein the listener controller returns a confirmation message to the talker.

20. A bus bridge interconnect, comprising:

means for providing a bandwidth change request via a talker bus bridge portal from a talker to an isochronous resource manager (IRM); and

means for providing the bandwidth change request from the IRM to one or more bus bridge portals, wherein one or more bus bridge portals are listener portals and one or more bus bridge portals are intermediary portals.

21. The system of claim 20, further comprising means for providing the bandwidth change request to the isochronous resource manager from a talker.

22. The system of claim 20, wherein one of the one or more bus bridge portals is the talker bus bridge portal that provides the bandwidth change request for the talker.

23. The system of claim 22, further comprising means for providing the bandwidth change request from the talker bus bridge portal to the one or more intermediary portals.

24. The system of claim 23, further comprising means for informing one or more intermediary controllers associated with the one or more intermediary portals of the bandwidth change request.

25. The system of claim 24, wherein the one or more listener portals informs a listener controller of the bandwidth change request.

26. The system of claim 25, wherein the listener controller includes means for returning a confirmation message to the talker.

27. A bus bridge interconnect, comprising:

means for sensing a bandwidth change request from a talker by an isochronous resource manager (IRM); and

means for instigating a bandwidth adjustment associated with the bandwidth change request from the IRM to one or more bus bridge portals.

28. The system of claim 27, further comprising:

means for modifying bandwidth change requests in bus bridge portals, wherein channel assignments and connections are maintained.