METHOD AND APPARATUS FOR COEXISTENCE
First Claim
1. A method for coexistence of an orthogonal frequency division multiple access (OFDMA) receiver with a synchronous frame-based transmitter within a mobile station comprising:
- receiving an estimated media access protocol (MAP′
) signal indicating when a MAP message is expected to be received by the OFDMA receiver;
sending the MAP′
signal to the synchronous frame-based transmitter to shut down the synchronous frame-based transmitter when a MAP message is expected to be received.
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Accused Products
Abstract
A method for coexistence of an orthogonal frequency division multiple access (OFDMA) receiver (117) such as a WiMAX receiver with a synchronous frame-based transmitter (115) such as a Bluetooth transmitter within a mobile station (110) receives an estimated media access protocol (MAP′) signal indicating when a MAP message is expected to be received by the OFDMA receiver (117) and uses it at a Bluetooth shutdown signal (190) at least when a MAP message is expected to be received. The MAP′ signal can be taken directly from the ODFMA transceiver (117) or it may be produced through analysis of a receiver-enable (RXE) signal that includes not only MAP symbols but also downlink data symbols. The RXE signal can be analyzed using interrupt-and-timer, Fast Fourier Transform, covariance, and/or delay-locked loop techniques to extract historical MAP symbol information and generate expected MAP symbol information. Shutting down a Bluetooth transmitter during expected MAP message receipt permits the OFDMA receiver to maintain synchronicity with an access point while not requiring the Bluetooth transmitter to shut down every time the OFDMA receiver expects to receive an OFDMA symbol.
155 Citations
21 Claims
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1. A method for coexistence of an orthogonal frequency division multiple access (OFDMA) receiver with a synchronous frame-based transmitter within a mobile station comprising:
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receiving an estimated media access protocol (MAP′
) signal indicating when a MAP message is expected to be received by the OFDMA receiver;sending the MAP′
signal to the synchronous frame-based transmitter to shut down the synchronous frame-based transmitter when a MAP message is expected to be received. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A co-existence predictor comprising:
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an observer unit for observing a receiver-enable (RXE) signal from a first transceiver operating at a frequency band and determining a frequency, duration, and phase of a media access protocol (MAP) symbol within the RXE signal; an estimator unit for producing an estimated media access protocol (MAP′
) signal from the frequency, duration, and phase of the MAP symbol; anda decision logic unit for producing a shut down signal to shut down a transmitter of a co-located second transceiver operating near the frequency band when the MAP′
signal is active. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification