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- Nachgewiesen in: USPTO Patent Grants
- Sprachen: English
- Patent Number: 9,048,932
- Publication Date: June 02, 2015
- Appl. No: 12/367500
- Application Filed: February 06, 2009
- Assignees: Google Technology Holdings LLC (Mountain View, CA, US)
- Claim: 1. A method for co-existence of an orthogonal frequency division multiple access (OFDMA) transceiver with a synchronous frame-based transmitter comprising: receiving a transmission enable (TXE) signal indicating that the OFDMA transceiver is transmitting; determining, from the TXE signal, an estimated transmission enable (TXE′) signal, the TXE′ signal being a prediction of the future TXE signal and indicating when the OFDMA transceiver is expected to be transmitting; sending the TXE′ signal to the synchronous frame-based transmitter to shut down the synchronous frame-based transmitter when a transmission is expected to be sent from the OFDMA transceiver.
- Claim: 2. A method according to claim 1 , further comprising: ascertaining whether the synchronous frame-based transmitter is operating as a master device or a slave device.
- Claim: 3. A method according to claim 2 , further comprising: attempting to role switch to a master device, if the ascertaining determines that the synchronous frame-based transmitter is not operating as a master device.
- Claim: 4. A method according to claim 1 , wherein the determining comprises: observing the TXE signal for a period of time; collecting timing data from observing the TXE signal; and calculating the TXE′ signal from the timing data.
- Claim: 5. A method according to claim 4 , further comprising: locating boundaries of a synchronous frame-based timeslot.
- Claim: 6. A method according to claim 5 , wherein the calculating further comprises: modifying the TXE′ signal by adding a pulse with a duration equivalent to at least one synchronous frame-based timeslot immediately prior to an existing pulse within the TXE′ signal.
- Claim: 7. A method according to claim 5 , wherein the calculating further comprises: modifying the TXE′ signal by shifting a pulse within the TXE′ signal ahead in time by at least one synchronous frame-based timeslot.
- Claim: 8. A method according to claim 7 , wherein the sending comprises: sending the modified TXE′ signal to an input capable of disabling the synchronous frame-based transmitter.
- Claim: 9. A method as in claim 7 , further comprising creating an estimated media access protocol (MAP′) signal from a received reception enable (RXE) signal indicating that an OFDMA transceiver is receiving; and sending the modified TXE′ signal and the MAP′ signal to the synchronous frame-based transmitter to shut down the synchronous frame-based transmitter.
- Claim: 10. A method according to claim 1 , further comprising: transmitting the TXE′ signal over a Bluetooth link.
- Claim: 11. An apparatus for co-existence of an orthogonal frequency division multiple access (OFDMA) transceiver with a synchronous frame-based transmitter comprising: an observer unit for receiving a transmit-enable (TXE) signal from the OFDMA transceiver; an estimator unit, coupled to the observer unit, for creating an estimated transmit-enable signal (TXE′) from the TXE signal, the TXE′ signal being a prediction of the future TXE signal and; a decision logic unit, coupled to the estimator unit, for determining a shut down signal for disabling the synchronous frame-based transmitter from the TXE′ signal.
- Claim: 12. An apparatus according to claim 11 , wherein the observer unit comprises: a microcontroller unit for finding frequency, phase, and duration of repetitive elements of the TXE signal.
- Claim: 13. An apparatus according to claim 11 , wherein the observer unit comprises: a Fast Fourier Transform block for finding frequency, phase, and duration of repetitive elements of the TXE signal.
- Claim: 14. An apparatus according to claim 11 , wherein the observer unit comprises: a delay-locked loop for finding frequency, phase, and duration of repetitive elements of the TXE signal.
- Claim: 15. An apparatus according to claim 11 , wherein the observer unit comprises: a covariance block for finding frequency, phase, and duration of repetitive elements of the TXE signal.
- Claim: 16. An apparatus according to claim 11 , wherein the decision logic unit is coupled to the synchronous frame-based transmitter.
- Claim: 17. An apparatus according to claim 11 , wherein the synchronous frame-based transmitter receives the shut down signal.
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- Primary Examiner: Chen, Sibin
- Attorney, Agent or Firm: Lerner, David, Littenberg, Krumholz & Mentlik, LLP
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