Encoded acknowledge signal for wireless communication

• US 8,108,529 B1
• Filed: 03/12/2008
• Issued: 01/31/2012
• Est. Priority Date: 03/12/2007
• Status: Active Grant

• Current Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Original Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Inventors: Wright, David G.
• Primary Examiner(s): Swearingen, Jeffrey R
• Application Number:
  US12/075,633
• Time in Patent Office: 1,420 Days
• Field of Search: None
• US Class Current: 709/227
• CPC Class Codes: G05F 1/10 Regulating voltage or current G05F1/02 takes precedence; for electric railways B60M3/02
• CPC Class Codes: G05F 1/46 wherein the variable actually regulated by the final control device is dc G05F1/625 takes precedence
• CPC Class Codes: G06F 1/24 Resetting means
• CPC Class Codes: G06F 13/24 using interrupt G06F13/32 takes precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H02M 1/08 Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• CPC Class Codes: H03L 5/02 of power
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

A method in accordance with one embodiment of the invention can include transmitting wirelessly an encoded message that comprises reconciliation data to a host system. Additionally, an acknowledge packet can be received wirelessly from the host system, wherein the acknowledge packet corresponds to the encoded message. It can be determined if reconciliation data of the acknowledge packet has been changed in a predetermined way. If the reconciliation data of the acknowledge packet has been changed in the predetermined way, a peripheral device can be caused to enter a first mode.

Claims

1. A method comprising:

wirelessly transmitting an encoded message from a peripheral device to a host system, the encoded message comprising first reconciliation data, wherein the first reconciliation data is a multi-bit cyclic redundancy check (CRC) data;

wirelessly receiving at the peripheral device an acknowledgement message from the host system, the acknowledgement message in response to the encoded message and including second reconciliation data, wherein the second reconciliation data is a multi-bit cyclic redundancy check (CRC) data;

determining at the peripheral device whether the host system has information to transmit to the peripheral device through determining whether the second reconciliation data of the acknowledgement message received at the peripheral device is the first reconciliation data modified in a predetermined way, wherein the first reconciliation data modified in the predetermined way includes the first reconciliation data modified through an inversion operation; and

determining a mode of the peripheral device based on the determination of whether the host has information to transmit to the peripheral device.

2. The method of claim 1, further comprising changing the mode of the peripheral device to a first mode when the determination of whether the second reconciliation data is the first reconciliation data modified in the predetermined way indicates that the first and the second reconciliation data have not changed with respect to each other.

3. The method of claim 2, wherein the changing to the first mode comprises the peripheral device entering one of a sleep mode or low power mode.

4. The method of claim 1, further comprising changing the mode of the peripheral device to a second mode when the determination of whether the second reconciliation data is the first reconciliation data modified in the predetermined way indicates that the first and the second reconciliation data have changed with respect to each other.

5. The method of claim 4, wherein the second mode includes remaining in a receive mode for a period of time to allow for receiving the information from the host system.

6. The method of claim 5, comprising entering another mode if the period of time to allow for receiving the information from the host system has exceeded a predefined period of time.

7. The method of claim 5, comprising sending an acknowledgement packet to the host system after receiving the information from the host system.

8. The method of claim 1, wherein prior to the wirelessly transmitting of the encoded message, generating the encoded message to include cyclic redundancy check (CRC) data as the reconciliation data.

9. A system comprising:

a host system; and

a peripheral device configured to wirelessly transmit an encoded message that comprises first reconciliation data to the host system,

the host system comprising a processor configured to;

invert the first reconciliation data if the host system has further information to transmit to the peripheral device; and

wirelessly transmit to the peripheral device, in response to the encoded message, an acknowledge packet that corresponds to the encoded message, the acknowledge packet comprising second reconciliation data, and

the peripheral device further configured to make a determination whether the host system has further information to transmit to the peripheral device through determining whether the second reconciliation data includes inverted first reconciliation data, the peripheral device comprising a first mode when the second reconciliation data does not include the inverted first reconciliation data and the peripheral device comprising a second mode when the second reconciliation data does include the inverted first reconciliation data.

10. The system of claim 9, wherein the peripheral device is selected from the group consisting of a keyboard, a remote control, and a computer mouse.

11. The system of claim 9, wherein the host system is selected from the group consisting of a computer system, a set-top box, and a television.

12. The system of claim 9, wherein the host system is configured to transmit to the peripheral device, subsequent to transmitting the second reconciliation data, a further encoded message comprising reconciliation data and the further information.

13. The system of claim 12, wherein the peripheral device is configured to enter the first mode after a predefined time period has expired without the peripheral device having received the further encoded message.

14. The system of claim 9, wherein the peripheral device and the host system are configured to transmit wirelessly either by infrared transmission or by radio frequency transmission.

15. A method comprising:

receiving by a host device an encoded message that comprises reconciliation data, the encoded message received through wireless communication with a peripheral device;

responsive to receiving the encoded message and using a processor and instructions of the host device;

determining whether to transmit to the peripheral device, data that is unrelated to the encoded message; and

when it is determined to transmit the data that is unrelated to the encoded message, inverting the reconciliation data of the encoded message, and transmitting wirelessly to the peripheral device, an acknowledge packet corresponding to the encoded message, the acknowledge packet including inverted reconciliation data, the inverted reconciliation data to indicate to the peripheral device that the host device will subsequently transmit to the peripheral device a packet including the data that is unrelated to the encoded message, and cause the peripheral device to operate in a receive mode for a period.

16. The method of claim 15, wherein the peripheral device is selected from the group consisting of a keyboard, a remote control, and a computer mouse.

17. The method of claim 15, further comprising:

when it is determined not to transmit data that is unrelated to the encoded message, the processor implements instructions to transmit wirelessly to the peripheral device, an acknowledge packet corresponding to the encoded message and including the reconciliation data unchanged to cause the peripheral device to enter a low power mode.