Method for transmitting a datum from a time-dependent data storage means

• US 7,984,210 B2
• Filed: 06/20/2006
• Issued: 07/19/2011
• Est. Priority Date: 06/20/2006
• Status: Expired due to Fees

• Current Assignee: NXP USA, Inc. (NXP Semiconductors NV)
• Original Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Inventors: Patzelt, Christoph, Litovtchenko, Vladimir, Moeller, Dirk
• Primary Examiner(s): Shin; Christopher B
• Application Number:
  US12/304,197
• Publication Number:
  US 20090327545A1
• Time in Patent Office: 1,855 Days
• Field of Search: 710 52- 57, 710305-307
• US Class Current: 710/52
• CPC Class Codes: H04L 12/40006 Architecture of a communication node current supply arrangements H04L12/10; intermediate storage or scheduling H04L49/90
• CPC Class Codes: H04L 2012/40241 Flexray
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: H04L 49/90 Buffering arrangements

Abstract

A method of transmitting a datum from a time-dependent data storage means, the datum being that most recently acquired before the occurrence of an allocated transmission slot; the method comprising the steps of: writing a first acquired datum to a first side of the data storage means; transferring the first datum to a second side of the data storage means; and writing a next datum, acquired before the occurrence of the next allocated transmission slot, to the first side of the data storage means; wherein the method further comprises the step of: replacing the first acquired datum in the second side of the data storage means with the next acquired datum; and transmitting the next acquired datum from the data storage means at the next allocated transmission slot.

Claims

1. A method of transmitting datum from a time-dependent data storage system, the method comprising the steps of:

transmitting a first datum from a first buffer of the time-dependent data storage system at an occurrence of a first allocated transmission slot;

writing a second datum to a second buffer of the time-dependent data storage system at the occurrence of the first allocated transmission slot;

transferring the second datum to the first buffer of the time-dependent data storage system before an occurrence of a second allocated transmission slot;

writing a third datum, acquired before the occurrence of the second allocated transmission slot, to the second buffer of the time-dependent data storage system;

replacing the second datum in the first buffer of the time-dependent data storage system with the third datum stored at the second buffer before the occurrence of the second allocated transmission slot; and

transmitting the third datum from the data storage system at the second allocated transmission slot.

2. The method as claimed in claim 1, wherein the method is operated within a time division multiple access protocol.

3. The method as claimed in claim 1, wherein the method is operated within the FlexRay (trademark) protocol.

7. The method as claimed in claim 2, wherein the method is operated within the FlexRay (trademark) protocol.

14. The method of claim 1, wherein the time-dependent data storage system includes a double buffer.

15. The method of claim 14, wherein the first buffer is a transmit-buffer of the double buffer.

16. The method of claim 14, wherein the second buffer is a host-side buffer of the double buffer.

17. The method of claim 1, wherein a current datum in the first buffer is transmitted from the data storage system at an occurrence of each allocated transmission slot.

18. The method of claim 1, wherein each new datum written into the second buffer before the occurrence of each allocated transmission slot replaces a current datum written in the first buffer.

4. A time-dependent data storage system comprising:

a logic unit; and

a double buffer in communication with the logic unit, the double buffer adapted to transmit a first datum from a transmit-side of the double buffer at an occurrence of a first allocated transmission slot, to write a second datum to the transmit-side of the double buffer whilst waiting for a second allocated transmission slot, and to write a third datum, subsequently acquired whilst waiting for the second transmission slot, to a host-side of the double buffer;

wherein the logic unit is adapted to transfer the second datum from the host-side to the transmit-side whilst waiting for the second allocated transmission slot, and the second datum is transmitted from the transmit-side upon the occurrence of the second allocated transmission slot.

5. The system of claim 4 wherein the system operates in accordance with a time division multiple access protocol.

6. The system of claim 4 wherein the system operates in accordance with the FlexRay (trademark) protocol.

8. The system of claim 5 wherein the system operates in accordance with the FlexRay (trademark) protocol.

19. The system of claim 4 wherein a current datum in the transmit-side buffer is transmitted from the data storage system at an occurrence of each allocated transmission slot.

20. The system of claim 4 wherein each new datum written into the host-side buffer before the occurrence of each allocated transmission slot replaces a current datum written in the transmit-side buffer.

9. A method comprising:

transmitting a first datum from a transmit-side of a double buffer at an occurrence of a first allocated transmission slot;

writing a next datum of a plurality of second datum to a host-side of the double buffer at the occurrence of the first allocated transmission slot;

transferring the next datum of the plurality of second datum from the host-side to the transmit-side before an occurrence of a second allocated transmission slot;

writing each datum of the plurality of second datum sequentially to the host-side of the double buffer before the occurrence of the second allocated transmission slot;

replacing a previously acquired datum of the plurality of second datum in the transmit-side with a most recently acquired datum of the plurality of second datum stored at the host-side before the occurrence of the second allocated transmission slot; and

transmitting the most recently acquired datum from the double buffer at the occurrence of the second allocated transmission slot.

10. The method as claimed in claim 9, wherein the method is operated within a time division multiple access protocol.

11. The method as claimed in claim 10, wherein the method is operated within the FlexRay (trademark) protocol.

12. The method as claimed in claim 9, wherein the method is operated within the FlexRay (trademark) protocol.

13. The method of claim 9, wherein a current datum in the transmit-side buffer is transmitted from the data storage system at an occurrence of each allocated transmission slot.