Method and system for adjusting isochronous bandwidths on a bus

• US 6,728,821 B1
• Filed: 11/27/2000
• Issued: 04/27/2004
• Est. Priority Date: 11/29/1999
• Status: Expired due to Term

• 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: James, David Vernon, Hunter, David, Shima, Hisato, Fairman, Bruce
• Primary Examiner(s): Auve, Glenn A.
• Assistant Examiner(s): Lee, Christopher E
• Application Number:
  US09/723,958
• Time in Patent Office: 1,247 Days
• Field of Search: 710/306, 370/465, 370/260
• 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 12/40071 Packet processing; Packet format adaptation of digital video signals for transport over a specific network H04N21/2381, H04N21/4363, H04N21/4381; packet switches H04L49/00; intermediate storage or scheduling H04L49/90
• CPC Class Codes: H04L 12/40078 Bus configuration home automation networks H04L12/2803; arrangements for maintenance or administration H04L41/00
• CPC Class Codes: H04L 12/40091 Bus bridging LAN interconnection over a bridge based backbone H04L12/462; single bridge functionality H04L12/462
• CPC Class Codes: H04L 12/40117 Interconnection of audio or video/imaging devices home automation networks H04L12/2803; bitstream network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 12/462 LAN interconnection over a bridge based backbone
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 12/64 Hybrid switching systems
• CPC Class Codes: H04L 2101/604 Address structures or formats
• 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
• CPC Class Codes: H04L 41/12 Discovery or management of network topologies
• CPC Class Codes: H04L 45/02 Topology update or discovery
• CPC Class Codes: H04L 45/48 Routing tree calculation
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
• CPC Class Codes: H04L 61/5046 Resolving address allocation conflicts; Testing of addresses testing when self-assigning an address H04L61/5092
• CPC Class Codes: H04L 61/5053 Lease time; Renewal aspects
• CPC Class Codes: H04L 61/5061 Pools of addresses
• CPC Class Codes: H04L 61/5076 Update or notification mechanisms, e.g. DynDNS
• CPC Class Codes: H04L 61/5092 by self-assignment, e.g. picking addresses at random and testing if they are already in use

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 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);

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

informing a plurality of listeners of the bandwidth adjustment.

2. The method of claim 1, further comprising:

modifying bandwidth change requests in 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.

4. A method of adjusting 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 one or more bus bridge portals are listener portals and one or more bus bridge portals are intermediary portals.

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 buses are 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 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 a listener portal that informs a 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, wherein the IRM signals a bandwidth change request to one or more bus bridge portals;

a bus bridge portal to accept bandwidth change requests from the IRM;

a plurality of listeners; and

a plurality of controllers, each controller associated with a corresponding listener, each controller to inform each listener of the bandwidth change request.

13. The system of claim 12, wherein the bus is compatible with the EEE 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 a talker.

16. The system of claim 15, further comprising one or more intermediary portals connected with the talker portal.

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

18. The system of claim 17, further comprising a listener portal connected with one of the one or more intermediary portals.

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. The system of claim 12, wherein one or more controllers modify bandwidth allocations associated with the bandwidth change request.

21. 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);

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; and

means for informing a plurality of listeners of the bandwidth adjustment.

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

23. The system of claim 21, wherein the talker bus bridge portal provides the bandwidth change request for a talker.

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

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

26. The system of claim 25, wherein one of the one or more intermediary portals is a listener portal that informs a listener controller of the bandwidth change request.

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

28. A bus bridge interconnect, comprising:

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

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

means for informing a plurality of listeners of the bandwidth adjustment.

29. The system of claim 28, further comprising:

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