Multi-purpose WAN driver for DSP resource adapter

• US 6,549,945 B1
• Filed: 03/11/1999
• Issued: 04/15/2003
• Est. Priority Date: 03/11/1999
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Parikh, Himanshu, Frye, David A., Kulkarni, Veerbhadra S., Sinibaldi, John C., Turbeville, Gary L
• Primary Examiner(s): Oda, Christine
• Assistant Examiner(s): Benson, Walter
• Application Number:
  US09/266,350
• Time in Patent Office: 1,496 Days
• Field of Search: 370/336, 370/384, 709/250, 709/226, 709/235, 710/13, 712/35
• US Class Current: 709/226
• CPC Class Codes: G06F 9/5044 considering hardware capabilities
• CPC Class Codes: G06F 9/505 considering the load
• CPC Class Codes: G06F 9/5055 considering software capabilities, i.e. software resources associated or available to the machine

Abstract

A communication system (100) includes at least one digital signal processor (DSP) and a WAN driver (80) operating on a processor that is electrically coupled to a memory. The WAN driver (80) receives task allocation requests from a host to open/close communication channels that are handled by the at least one DSP. Each task is allocated to one of the at least one DSP according to a total current task processing load for each of the at least one DSP, a maximum processing capability for each of the at least one DSP, and a processing requirement for each task being allocated to the one of the at least one DSP that can handle the additional processing load of the task being allocated.

Claims

1. A communication system comprising:

at least one DSP in a DSP Resource Adapter;

a processor electrically coupled to the at least one DSP and to a memory, the memory including a task processing loading table containing one or more values corresponding to a current task processing load for each of the at least one DSP;

means for dynamically updating the task processing loading table in accordance with changes to the current task processing loads of the at least one DSP, wherein the current task processing loads of the at least one DSP are assessed periodically and numerical values indicating current task processing loads for the at least one DSP are written to the task processing loading table; and

a WAN driver coupled to the processor for reading the one or more values in the task processing loading table so as to handle allocation of tasks across the at least one DSP and distribute task processing loads across the at least one DSP according to a total current task processing load for each of the at least one DSP, a maximum processing capability for each of the at least one DSP, and a processing requirement for a task being allocated to one of the at least one DSP that can handle the additional processing load of the task being allocated.

2. The communication system as recited for claim 1, wherein the WAN driver updates the task processing loading table to keep track of the current total processing load of each of the at least one DSP according to a processing requirement of at least one task currently allocated to the at least one DSP.

3. The communication system as recited for claim 2, wherein the WAN driver updates a value in the task processing loading table to remove a task processing requirement from the current total processing load of one of the at least one DSP in response to the task being de-allocated from the at least one DSP.

4. A communications controller for interfacing between a system unit comprising a system processor, and a Peripheral Component Interconnect Mezzanine Card (“

PMC”

) comprising a plurality of digital signal processors (“

DSPs”

) and a time division multiplexing (“

TDM”

) interface for connecting to external devices, the controller comprising;

a bus;

a processor, coupled to the bus;

a memory device, coupled to the processor;

a Peripheral Component Interface (“

PCI”

) bus system, coupled to the processor;

a PCI-PMC connector, for connecting the controller to the PMC, coupled to the PCI bus system;

a system unit connector, for connecting to the system unit, coupled to the PCI bus system; and

a driver, wherein the driver comprises;

means for supplying an Application Programmer'"'"'s Interface (“

API”

) for interfacing to the system processor;

means for handling task allocation requests for the plurality of DSPs from the system processor;

means for loading a task processing loading table containing one or more values corresponding to current task processing loads for each of the plurality of DSPs, wherein the task processing loading table is dynamically updated in accordance with changes to the current task processing loads of the plurality of DSPs and wherein the current task processing loads of the plurality of DSPs are assessed periodically and numerical values indicating current task processing loads for the plurality of DSPs are written to the task processing loading table; and

means for reading the one or more values in the task processing loading table and allocating a task to one of the plurality of DSPs according to a MIPs processing requirement of the task and the available processing capability of the one of the plurality of DSPs in response to a task allocation.

5. The communications controller according to claim 4, wherein the task implements a data communication channel being handled by one of the plurality of DSPs.

6. The communications controller according to claim 5, wherein the data communication channel communicates data comprising at least one of voice data, fax data, and computer data.

7. The communications controller of claim 4, wherein the means for supplying an API comprises means for routing time slots on the TDM interface of the PMC to the plurality of DSPs on the PMC, and wherein the routing means configures multiple time slots to be routed to any one of the plurality of DSPs, each time slot constituting a communication channel, or task, being handled by the one of the plurality of DSPs.

8. The communications controller of claim 7, wherein the routing means supports conferencing applications by routing multiple transmit and receive time slots to any one of the plurality of DSPs.

9. A method for a communications system that includes a plurality of DSPs, the method comprising the steps of:

receiving task allocation requests for tasks that handle communications channels in the plurality of DSPs;

means for dynamically updating a task processing loading table containing one or more values corresponding to a current task processing load for each of the plurality of DSPs in accordance with changes to the current task processing loads of the plurality of DSPs, wherein the current task processing loads of the plurality of DSPs are assessed periodically and numerical values indicating current task processing loads for the plurality of DSPs are written to the task processing loading table;

reading from the task processing loading table one or more values corresponding to the current task processing load for each of the plurality of DSPs; and

allocating tasks to each of the plurality of DSPs, in response to receiving the task allocation requests, to handle communication channels across each of the plurality of DSPs and to distribute task processing loads across the plurality of DSPs according to a total current task processing load for each of the plurality of DSPs, a maximum processing capability for each of the plurality of DSPs, and a processing requirement for each of the tasks being allocated to each of the plurality of DSPs that can handle the additional processing load of each of the tasks being allocated.

10. The method according to claim 9, wherein the communication channels communicate data comprising at least one of voice data, fax data, and computer data.