Adaptive cellular power control
First Claim
1. A method of mitigating interference in an active mobile wireless communication device including a wireless cellular transceiver and a wireless non-cellular transceiver co-located in the mobile wireless communication device, the method comprising:
- estimating a receive signal quality for the wireless non-cellular transceiver that includes interference from signals transmitted by the wireless cellular transceiver;
adjusting an actual transmit power of the wireless cellular transceiver based on the estimated receive signal quality, wherein adjusting the actual transmit power of the wireless cellular transceiver comprises;
determining an unadjusted digital gain setting for a variable gain transmit amplifier in the wireless cellular transceiver based on one or more messages received through a downlink of the wireless cellular connection,determining a digital gain adjustment value based on the estimated receive signal quality,generating an adjusted digital gain setting for the variable gain transmit amplifier by combining the unadjusted digital gain setting and the digital gain adjustment value, andsetting a gain of the variable gain transmit amplifier using the adjusted digital gain setting; and
repeating periodically the estimating and adjusting;
wherein the actual transmit power of the wireless cellular transceiver is less than a requested transmit power for the wireless cellular transceiver.
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Accused Products
Abstract
A method of mitigating interference in a mobile wireless communication device by adaptively adjusting transmit power levels of a wireless cellular transceiver. A receive signal quality for a wireless non-cellular transceiver that includes interference from signals transmitted by the wireless cellular transceiver is estimated. The wireless non-cellular and wireless cellular transceivers are co-located in the mobile wireless communication device, and both transceivers are active. An actual transmit power of the wireless cellular transceiver is adjusted based on the estimated receive signal quality to a level less than a requested transmit power. The estimation of the receive signal quality and the adjusting of the actual transmit power is periodically repeated. The estimation accounts for operational properties of the wireless cellular and non-cellular transceivers as well as operational characteristics of wireless connections through the transceivers.
43 Citations
17 Claims
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1. A method of mitigating interference in an active mobile wireless communication device including a wireless cellular transceiver and a wireless non-cellular transceiver co-located in the mobile wireless communication device, the method comprising:
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estimating a receive signal quality for the wireless non-cellular transceiver that includes interference from signals transmitted by the wireless cellular transceiver; adjusting an actual transmit power of the wireless cellular transceiver based on the estimated receive signal quality, wherein adjusting the actual transmit power of the wireless cellular transceiver comprises; determining an unadjusted digital gain setting for a variable gain transmit amplifier in the wireless cellular transceiver based on one or more messages received through a downlink of the wireless cellular connection, determining a digital gain adjustment value based on the estimated receive signal quality, generating an adjusted digital gain setting for the variable gain transmit amplifier by combining the unadjusted digital gain setting and the digital gain adjustment value, and setting a gain of the variable gain transmit amplifier using the adjusted digital gain setting; and repeating periodically the estimating and adjusting; wherein the actual transmit power of the wireless cellular transceiver is less than a requested transmit power for the wireless cellular transceiver. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A mobile wireless communication device, comprising:
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a first transceiver that receives signals through a wireless non-cellular connection; a second transceiver that transmits signals through a wireless cellular connection; and a control processor coupled to the first and second transceivers, wherein the control processor mitigates interference in the mobile wireless communication device by; estimating a performance impact to signals received by the first transceiver from signals transmitted by the second transceiver; adjusting an actual transmit power of the second transceiver based on the performance impact estimation; and repeating periodically the estimating and adjusting while both the wireless non-cellular and wireless cellular connections are active; wherein the actual transmit power of the second transceiver is less than a requested transmit power for an uplink of the wireless cellular connection, wherein adjusting the actual transmit power of the second transceiver based on the performance impact estimation comprises; determining an unadjusted digital gain setting for a variable gain transmit amplifier in the second transceiver based on one or more messages received through a downlink of the wireless cellular connection, determining a digital gain adjustment value based on the performance impact estimation, generating an adjusted digital gain setting for the variable gain transmit amplifier by combining the unadjusted digital gain setting and the digital gain adjustment value, and setting a gain of the variable gain transmit amplifier using the adjusted digital gain setting. - View Dependent Claims (8, 9, 10, 11)
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12. Non-transitory computer readable medium for storing computer program code executable by a processor for mitigating interference in a mobile wireless communication device comprising:
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computer program code for estimating a performance impact to signals received by a first transceiver of the mobile wireless communication device through a wireless non-cellular connection from signals transmitted by a second transceiver of the mobile wireless communication device through a wireless cellular connection; computer program code for adjusting an actual transmit power of the second transceiver based on the performance impact estimation; and computer program code for periodically repeating the estimating and adjusting while the wireless non-cellular and wireless cellular connections are active; wherein the actual transmit power of the second transceiver is less than a requested transmit power for an uplink of the wireless cellular connection, wherein adjusting the actual transmit power of the second transceiver based on the performance impact estimation comprises; determining an unadjusted digital gain setting for a variable gain transmit amplifier in the second transceiver based on one or more messages received through a downlink of the wireless cellular connection, determining a digital gain adjustment value based on the performance impact estimation, generating an adjusted digital gain setting for the variable gain transmit amplifier by combining the unadjusted digital gain setting and the digital gain adjustment value, and setting a gain of the variable gain transmit amplifier using the adjusted digital gain setting. - View Dependent Claims (13, 14)
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15. An apparatus for adjusting transmit signals output by a cellular transceiver in a mobile wireless communication device, the apparatus comprising:
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means for estimating a performance impact to signals received by a non-cellular transceiver of the mobile wireless communication device from signals transmitted by the cellular transceiver; means for determining a requested transmit power level for the transmit signals output by the cellular transceiver, the requested transmit power level at least partially based on messages received from a network subsystem to which the cellular transceiver connects; means for adjusting an actual transmit power level of the transmit signals to a value different than the requested transmit power level when the performance impact to signals received by the non-cellular transceiver exceeds a first threshold; and means for repeating the estimating, determining and adjusting periodically while the cellular and non-cellular transceivers are active, wherein means for adjusting the actual transmit power level of the transmit signals to a value different than the requested transmit power level when the performance impact to signals received by the non-cellular transceiver exceeds the threshold comprises; means for determining an unadjusted digital gain setting for a variable gain transmit amplifier in the cellular transceiver based on the requested transmit power level, means for determining a digital gain adjustment value based on the performance impact estimation, means for generating an adjusted digital gain setting for the variable gain transmit amplifier by combining the unadjusted digital gain setting and the digital gain adjustment value, and means for setting a gain of the variable gain transmit amplifier using the adjusted digital gain setting. - View Dependent Claims (16, 17)
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Specification