METHODS AND SYSTEMS FOR COMBINING TIMING SIGNALS FOR TRANSMISSION OVER A SERIAL INTERFACE

• US 20100215133A1
• Filed: 02/25/2009
• Published: 08/26/2010
• Est. Priority Date: 02/25/2009
• Status: Active Grant

• Current Assignee: North Star Innovations Inc. (Wi-LAN Inc.)
• Original Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Inventors: Bhan, Vivek, Schwartz, Daniel B., Stebbings, Kenneth E.
• Granted Patent: US 8,170,166 B2
• Time in Patent Office: Days
• US Class Current: 375/354
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04J 3/0685 Clock or time synchronisation in a node; Intranode synchronisation

Abstract

Apparatus, systems, and methods are provided for transmitting messages over a serial interface. A method comprises receiving a first signal at a first time and receiving a second signal at a second time, the second time being after the first time. If a difference between the second time and the first time is less than a threshold time period, the method comprises generating a first message that is representative of the first signal and the second signal and transmitting the first message over the serial interface. In accordance with one embodiment, the threshold time period is equal to one half of an interface acquisition delay time period associated with the serial interface.

Claims

1. A method for transmitting a message over a serial interface, the method comprising:

receiving a first signal at a first time;

receiving a second signal at a second time, the second time being after the first time; and

if a difference between the second time and the first time is less than a threshold time period;

generating a first message, the first message being representative of the first signal and the second signal; and

transmitting the first message over the serial interface.

2. The method of claim 1, the serial interface having an interface acquisition delay time period associated with transmission, the threshold time period being equal to one half of the interface acquisition delay time period, wherein:

receiving the first signal comprises receiving a first timing signal at the first time;

receiving the second signal comprises receiving a second timing signal at the second time;

generating the first message comprises generating a combined timing message, the combined timing message being representative of the first timing signal and the second timing signal; and

transmitting the first message comprises transmitting the combined timing message over the serial interface.

3. The method of claim 2, wherein transmitting the combined timing message comprises transmitting the combined timing message at a transmit time, the transmit time being equal to the first time plus the interface acquisition delay time period.

4. The method of claim 1, wherein generating the first message comprises:

generating a first timing message based on the first signal;

generating a second timing message based on the second signal; and

combining the first timing message and the second timing message to obtain the first message.

5. The method of claim 4, wherein combining the first timing message and the second timing message comprises performing an OR operation on the first timing message and the second timing message.

6. The method of claim 4, the first timing message having a first payload and the second timing message having a second payload, wherein combining the first timing message and the second timing message comprises performing an OR operation on the first payload and the second payload.

7. The method of claim 1 wherein:

receiving the first signal comprises receiving a first timing accurate strobe signal at the first time;

receiving the second signal comprises receiving a second timing accurate strobe signal at the second time; and

generating the first message comprises generating a combined timing accurate strobe message, the combined timing accurate strobe message being representative of the first timing accurate strobe signal and the second timing accurate strobe signal.

8. The method of claim 1, wherein if the difference between the second time and the first time is greater than the threshold time period, the method further comprises:

generating a first timing message based on the first signal;

transmitting the first timing message over the serial interface;

generating a second timing message based on the second signal; and

transmitting the second timing message over the serial interface, wherein the second timing message is transmitted after the first timing message.

9. A baseband module configured to transmit messages over a serial interface, the baseband module comprising:

a serial port;

a scheduling module coupled to the serial port, the scheduling module being configured to transmit timing messages over the serial interface via the serial port with an interface acquisition delay time period;

a message generation module coupled to the scheduling module, the message generation module being configured to;

receive a first timing signal at a first time;

receive a second timing signal at a second time, the second time being after the first time;

generate a combined timing message when a difference between the second time and the first time is less than a threshold time period, the combined timing message being representative of the first timing signal and the second timing signal; and

provide the combined timing message to the scheduling module, wherein the combined timing message is transmitted via the serial port.

10. The baseband module of claim 9, wherein the message generation module is configured to generate the combined timing message by:

generating a first timing message based on the first timing signal;

generating a second timing message based on the second timing signal; and

combining the first timing message and the second timing message.

11. The baseband module of claim 10, wherein the message generation module is configured to combine the first timing message and the second timing message by performing an OR operation on the first timing message and the second timing message.

12. The baseband module of claim 10, wherein:

the first timing message has a first payload;

the second timing message has a second payload; and

the message generation module is configured to combine the first timing message and the second timing message by performing an OR operation on the first payload and the second payload.

13. The baseband module of claim 10, wherein the scheduling module is configured to transmit the combined timing message at a transmit time, the transmit time being equal to the first time plus the interface acquisition delay time period.

14. The baseband module of claim 9, wherein the message generation module is configured to:

receive a first timing accurate strobe signal at the first time;

receive a second timing accurate strobe signal at the second time; and

generate a combined timing accurate strobe message, the combined timing accurate strobe message being representative of the first timing accurate strobe signal and the second timing accurate strobe signal.

15. A transceiver comprising:

a baseband module coupled to the serial interface, the baseband module being configured to;

generate a first strobe signal at a first time;

generate a second strobe signal at a second time, the second time being after the first time;

generate a combined message based on the first strobe signal and the second strobe signal if a difference between the second time and the first time is less than a threshold time period; and

transmit the combined message over the serial interface at a transmit time, the transmit time being after the first time; and

a radio frequency module coupled to the serial interface, the radio frequency module being configured to;

receive the combined message via the serial interface; and

deconstruct the combined message into the first strobe signal and the second strobe signal.

16. The transceiver of claim 15, wherein the radio frequency module is configured to:

adjust a first characteristic of the radio frequency module based on the first strobe signal; and

adjust a second characteristic of the radio frequency module based on the second strobe signal.

17. The transceiver of claim 16, wherein the radio frequency module comprises:

a transmitter lineup; and

a control module coupled to the serial interface and the transmitter lineup, the control module being configured to;

adjust a first characteristic of the transmitter lineup based on the first strobe signal; and

adjust a second characteristic of the transmitter lineup based on the second strobe signal.

18. The transceiver of claim 15, wherein the baseband module is configured to generate the combined message by:

generating a first message based on the first strobe signal;

generating a second message based on the second strobe signal; and

combining the first message and the second message.

19. The transceiver of claim 18, the first message having a first payload and the second message having a second payload, wherein the baseband module is configured to logically OR the first payload and the second payload.

20. The transceiver of claim 16, wherein the baseband module is configured to:

generate a first timing accurate strobe signal at the first time;

generate a second timing accurate strobe signal at the second time; and

generate a combined timing accurate strobe message based on the first timing accurate strobe signal and the second timing accurate strobe signal.