Distributed signal processing for data channels maintaining channel bandwidth

• US 5,805,827 A
• Filed: 03/04/1996
• Issued: 09/08/1998
• Est. Priority Date: 03/04/1996
• Status: Expired due to Term

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: 3Com Corporation (HP Inc.)
• Inventors: Chau, Wing Cheong, Leu, Dar-Ren
• Primary Examiner(s): Lall, Parshotam S.
• Assistant Examiner(s): CALDWELL, ANDREW T
• Application Number:
  US08/610,706
• Time in Patent Office: 918 Days
• Field of Search: 395/200.77, 395/200.76, 395/888, 395/182, 395/200.66, 395/200.67, 395/200.68, 395/186, 395/187.01, 364/715.02, 364/715.03, 380/42
• US Class Current: 709/247
• CPC Class Codes: H04Q 11/0435 Details

Abstract

A communication server includes one or more ISDN ports or other wide area network ports, one or more local area network ports, a plurality of processors and data channel resources which execute a process for distributing data channel signal processing among the plurality of processors. The process includes maintaining resource information for a set of processors on the communication server, the resource information concerning levels of utilization of processors in said set of processors; detecting, in processors corresponding to particular input/output ports of the server, activity in data channels through input/output ports managed by the processors; sending requests in response to the detected activity from the corresponding processors to a managing processor on the communication server, said requests identifying compression or decompression services needed for the detected activity; selecting in the managing processor in response to the resource information and the request, service processors from the set of processors in the server to provide compression or decompression services identified in the request for the detected activity on the data channel; and routing the detected activity on the data channels to the selected service processors.

Claims

1. In a data processing system including a plurality of processors and wherein the data channels comprise data flows in multi-packet sessions having channel bandwidths and a plurality of input/output ports, and wherein processors in the plurality of processors are coupled respectively with at least one input/output port, a method for managing signal processing on data channels using the plurality of input/output ports, comprising the steps of:

providing a management resource for signal processing services distributed in the plurality of processors;

requesting signal processing services from the management resource, in response to activity of a session on a particular data channel using one of the plurality of input/output ports;

selecting in the management resource in response to the request, one of the plurality of processors having available bandwidth as a service processor for the particular data channel; and

routing the activity of the session on the particular data channel through the service processor at about the channel bandwidth of the data channel for use of the signal processing services in the service processor.

2. The method of claim 1, wherein the step of selecting includes:

monitoring utilization of resources in the plurality of processors; and

selecting a processor from the plurality of processors as the service processor in response to the step of monitoring.

3. The method of claim 2, wherein the step of monitoring includes maintaining a table in the management resource indicating levels of utilization for processors in the plurality of processors.

4. The method of claim 2, wherein the step of monitoring utilization includes determining whether the corresponding input/output ports for the plurality of processors are busy.

5. The method of claim 2, wherein the processors in the plurality of processors have limited signal processing resources, and the step of monitoring utilization includes determining an amount of available signal processing resources for the processors in the plurality of processors.

6. The method of claim 1, wherein the step of routing includes executing a prespecified function upon completion of signal processing services in the service processor for the activity.

7. The method of claim 1, wherein the step of routing includes establishing a table in the management resource indicating for each active data channel, the processor to which the activity on the data channel is routed and a function to be executed upon completion of signal processing services in the service processor for the activity.

8. The method of claim 1, wherein the step of requesting includes specifying a function to be executed upon completion of signal processing services in the service processor for the activity.

9. The method of claim 1, wherein the step of requesting includes specifying a particular signal processing service for the activity, and the step of selecting is responsive to the particular signal processing service.

10. The method of claim 1, wherein the step of requesting includes specifying a bandwidth for the activity, and the step of selecting is responsive to the specified bandwidth.

11. The method of claim 1, wherein the signal processing services include compression and decompression.

12. The method of claim 1, wherein the signal processing services include encryption and decryption.

13. The method of claim 1, wherein the signal processing services include encoding and decoding.

14. In a communication server including a set of input/output ports and a set of processors, in which input/output ports in said set of input/output ports are coupled to corresponding processors in said set of processors, a method for distributing compression and decompression tasks for data channels supporting data flows in multi-packet sessions having respective channel bandwidths on said set of input/output ports to said set of processors, comprising the steps of:

maintaining resource information for said set of processors, the resource information concerning levels of utilization of processors in said set of processors;

detecting, in the corresponding processors, activity in sessions on data channels through input/output ports in said set of input/output ports;

sending requests, in response to the detected activity, from the corresponding processors to a managing processor in said set of processors, said requests identifying compression or decompression services needed for the detected activity;

selecting in the managing processor in response to the resource information and the requests, service processors from said set of processors to provide compression or decompression services identified in the requests for the detected activity on the data channels; and

routing the detected activity in the session on the data channels at about the channel bandwidth to the selected service processors.

15. The method of claim 14, wherein processors in said set of processors have compression and decompression resources capable of handling limited numbers of channels, and the resource information includes numbers of channels being handled by processors in said set of processors.

16. The method of claim 14, wherein processors in said set of processors have compression and decompression resources capable of handling limited bandwidths, and the resource information includes bandwidths channels being handled by processors in said set of processors.

17. The method of claim 14, wherein processors in said set of processors have compression and decompression resources capable of handling a plurality of compression/decompression algorithms, and wherein the requests identify respective ones of the plurality of compression/decompression algorithms for the data channels.

18. The method of claim 14, wherein the requests identify a bandwidth for activity on the channels, and the step of selecting is responsive to the identified bandwidth.

19. The method of claim 14, wherein the requests identify a function to be executed upon completion of execution of compression/decompression processes for a corresponding channel, and the step of routing includes calling the identified function.

20. The method of claim 14, wherein the step of routing includes establishing a table coupled to the management processor indicating for each active channel, the processor to which the channel is routed and a function to be executed upon completion of execution of compression/decompression services in the service processor for activity on the channel.

21. The method of claim 14, wherein the resource information includes indications of whether the input/output ports of corresponding processors in said set of processors are busy.

22. The method of claim 14, wherein a subset of said set of input/output ports comprises one or more ISDN ports.

23. The method of claim 14, wherein a subset of said set of input/output ports comprises one or more wide area network ports.

24. The method of claim 14, wherein a subset of said set of input/output ports comprises one or more local area network ports.

25. The method of claim 14, wherein a first subset of said set of input/output ports comprises one or more local area network ports, and a second subset of said set of input/output ports comprises one or more wide area network ports.

26. A communication server, comprising:

a plurality of input/output ports;

a plurality of processors, coupled to corresponding input/output ports in the plurality of input/output ports, processors in the plurality of processors including respective signal processing resources to provide encoding and decoding service to multi-packet sessions on data channels having channel bandwidths, and including resources for managing data channels through corresponding input/output ports, detecting requirements for encoding or decoding services in the managed data channels and supplying requests for detected requirements; and

data channel management resources in at least one processor in the plurality of processors, responsive to requests for detected requirements for encoding and decoding services, which routes sessions on data channels for which said services are requested at about the channel bandwidths of the sessions to processors in the plurality of processors having available signal processing resources.

27. The communication server of claim 26, wherein the signal processing resources comprise compression and decompression resources.

28. The communication server of claim 27, wherein the compression and decompression resources in at least one processor in the plurality of processors, include resources to execute a plurality of compression/decompression algorithms, and wherein the data channel management resources are responsive to the compression/decompression algorithms of the data channels to route the data channels.

29. The communication server of claim 26, wherein the signal processing resources comprise encryption and decryption resources.

30. The communication server of claim 26, wherein signal processing resources in the plurality of processors are capable of handling limited numbers of channels, and the data channel management resources are responsive to numbers of channels being handled by processors in said plurality of processors.

31. The communication server of claim 26, wherein signal processing resources in the plurality of processors are capable of handling limited bandwidths, and the data channel management resources are responsive to bandwidths of channels being handled by processors in said plurality of processors.

32. The communication server of claim 26, wherein the requests identify a function to be executed upon completion of encoding or decoding processes for a corresponding channel, and the data channel management resources include logic, responsive to the requests, to call the identified function.

33. The communication server of claim 26, wherein the data channel management resources include a store indicating for each active channel, the processor to which the channel is routed and a function to be executed upon completion of execution of signal processing services in the service processor for activity on the channel.

34. The communication server of claim 26, wherein the data channel management resources include a store for resource information concerning availability of signal processing resources in the plurality of processors.

35. The communication server of claim 34, wherein the resource information includes indications of whether the input/output ports of corresponding processors in the plurality of processors are busy.

36. The communication server of claim 34, wherein the resource information includes indications of available bandwidth for signal processing resources in processors in the plurality of processors.

37. The communication server of claim 26, wherein a subset of the plurality of input/output ports comprises one or more ISDN ports.

38. The communication server of claim 26, wherein a subset of the plurality of input/output ports comprises one or more wide area network ports.

39. The communication server of claim 26, wherein a subset of the plurality of input/output ports comprises one or more local area network ports.

40. The communication server of claim 26, wherein a first subset of the plurality of input/output ports comprises one or more local area network ports, and a second subset of the plurality of input/output ports comprises one or more wide area network ports.

41. The communication server of claim 26, wherein one of the plurality of processors is a management processor, and the data channel management resources comprise logic executed by the management processor, and said requests are directed to the management processor.

42. A communication server, comprising:

memory;

a plurality of input/output devices, the input/output devices respectively including input/output ports, processors, logic executed by the processors for establishing data channels having channel bandwidths through the input/output ports and storing data from the data channels in the memory, and compression and decompression logic executed by the processors; and

a central processor, coupled to the memory, including communication routing logic executed by the central processor to route data from data channels at about the channel bandwidths among the plurality of input/output devices, and including compression/decompression management logic executed by the central processor to allocate the compression and decompression logic in the plurality of input/output devices to data channels requiring compression and decompression service in response to levels of utilization of the processors in the plurality of input/output devices.