Transmit driver in communication system

• US 20060218472A1
• Filed: 03/09/2006
• Published: 09/28/2006
• Est. Priority Date: 03/10/2005
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Shah, Devarshi, Dahl, Sten Jorgen, Younkin, Kenton A.
• Granted Patent: US 7,925,955 B2
• Time in Patent Office: Days
• US Class Current: 714/776
• CPC Class Codes: H04L 1/0043 Realisations of complexity reduction techniques, e.g. use of look-up tables
• CPC Class Codes: H04L 1/0066 Parallel concatenated codes
• CPC Class Codes: H04L 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint

Abstract

Embodiments describe a transmit driver that processes data communication between a scheduler and a turbo encoder. Transmit driver receives a request for a super frame and ascertains whether it has enough information to start the super frame. If there is enough data, the super frame is written to an appropriate hardware register. Both Direct Memory Access (DMA) and non-DMA hardware can be supported with the one or more embodiments.

Claims

1. A method for data transmission, comprising:

maintaining a sorted list of turbo groups, wherein a turbo group comprises four turbo packets and a logical channel (LC) that includes at least sixteen turbo packets divided into groups of four;

receiving a request from an encoder for a super frame;

ascertaining if enough data is available to process the super frame by analyzing the maintained list of turbo groups; and

sending the super frame if there is enough data available.

2. The method of claim 1, further comprising:

reviewing the sorted list of turbo groups; and

writing at least seven data slots in the sorted list with associated control information to a hardware component.

3. The method of claim 1, further comprising:

receiving an interrupt from a non-direct memory access hardware component if a buffer is available;

selecting the next turbo group of a Logical Channel from the list of turbo groups; and

transferring a next turbo group for a frame.

4. The method of claim 1, further comprising:

receiving an interrupt from a direct memory access hardware component, the interrupt indicating that a Logical Channel has been consumed;

selecting the next turbo group of a Logical Channel from the list of turbo groups; and

initiating a direct memory access transfer.

5. The method of claim 4, further comprising copying the turbo groups in a temporary buffer.

6. An apparatus for data transmission;

comprising

a receiver that receives a request for a super frame;

a storage medium that maintains a list of turbo groups;

an analyzer that analyzes the maintained list of turbo groups to determine if there is data available to begin a super frame based on the received request; and

a writer that writes the super frame to a hardware register if the data is available.

7. The apparatus of claim 6, the receiver receives a function call from a scheduler;

and the written super frame is output by a turbo encoder for over the air transmission.

8. The apparatus of claim 7, the function call is one of:

an open sequence, a close sequence, a super frame send, and a diagnostic sequence.

9. The apparatus of claim 6, the receiver further receives from a direct memory access hardware component an interrupt indicating that a Logical Channel has been processed.

10. The apparatus of claim 9, the analyzer selects a next Logical Channel from the list of turbo groups and the writer process a direct memory access transfer to the direct memory access hardware component.

11. The apparatus of claim 6, the receiver further receives from a non-direct memory access hardware component an interrupt if a buffer is available.

12. The apparatus of claim 11, the analyzer selects a next Logical Channel from the list of turbo groups and the writer sends a next turbo group for a frame to the non-direct memory access hardware component

13. A computer readable medium having a computer program for:

receiving a request for a super frame;

maintaining a list of turbo groups;

analyzing the maintained list of turbo groups to determine if data is available to begin a super frame based on the received request; and

writing the super frame to a hardware register if the data is available.

14. The computer readable medium of claim 13, further comprising

receiving a function call to perform one of an open sequence, a diagnostic sequence, a super frame send sequence, and a close sequence;

and

processing the function call to control a hardware component.

15. The computer readable medium of claim 14, further comprising:

receiving an interrupt; and

selectively processing the interrupt whether the hardware component is a direct memory access hardware component or a non-direct memory access hardware component.

16. The computer readable medium of claim 15, selectively processing the interrupt if the hardware component is a direct memory access hardware component, further comprising selecting a next Logical Channel from the list of turbo groups and transmitting a direct memory access transfer to the direct memory access hardware component.

17. The computer readable medium of claim 15, selectively processing the interrupt if the hardware component is a non-direct memory access hardware component, further comprising selecting a next Logical Channel from the list of turbo groups;

and transmitting the next Logical Channel.

18. An apparatus for communicating data, comprising:

means for maintaining the list of turbo groups;

means for receiving a super frame request;

means for reviewing the maintained list to determine if data is available to complete the request; and

means for transmitting the super frame to at least one register if the data is available to complete the request.

19. The apparatus of claim 18, further comprising:

means for analyzing the maintained list for a plurality of Logical Channels; and

means for writing the plurality of Logical Channels and associated control information to a hardware component.

20. A processor that executes instructions for data communication, the instructions comprising:

sorting a listing of turbo groups;

wherein a turbo group comprises four turbo packets and a Logical Channel (LC) that includes at least four groups of four turbo packets;

storing the sorted list of turbo groups,

receiving a request for a super frame;

determining if enough data is available to process the super frame by analyzing the stored list of turbo groups; and

outputting the super frame if there is enough data available.