Interference cancellation system and method for wireless antenna configuration
First Claim
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1. A method comprising:
- providing a communication link between a mobile station and a controller in a wireless distributed antenna system (WDAS), wherein the WDAS is implemented inside a building and wherein the controller is a wireless distributed antenna system controller (WDASC);
receiving an indication at the controller that the mobile station is communicating through at least two remote units of the WDAS by receiving a radio-frequency message from each of the at least two remote units, wherein the mobile station is within the building;
selecting a first remote unit from the at least two remote units;
wirelessly transmitting a signal from the controller to the first remote unit, wherein the signal includes an indication to switch a radio-frequency (RF) reverse-link from the first remote unit to the controller to a reduced signal interference mode;
wherein selecting the first remote unit comprises;
comparing signal strengths received by the at least two remote units; and
based on the comparison, selecting the first remote unit, wherein the signal strength received by the first remote unit is less than the signal strength received by at least one of the remote units.
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Abstract
Presently disclosed is a method for reducing interference in a wireless distributed antenna systems. In an embodiment, interference is reduced by selectively placing a first wireless remote unit in a reduced signal interference mode. A controller sends a signal, such as a reverse link power-down signal, to the first remote unit after detecting less than a threshold incoming signal strength at the first remote unit. In an alternative embodiment, the controller requests that a given remote unit switch to the reduced signal interference mode when the controller is receiving signals from a mobile station through at least two different remote units.
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Citations
13 Claims
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1. A method comprising:
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providing a communication link between a mobile station and a controller in a wireless distributed antenna system (WDAS), wherein the WDAS is implemented inside a building and wherein the controller is a wireless distributed antenna system controller (WDASC); receiving an indication at the controller that the mobile station is communicating through at least two remote units of the WDAS by receiving a radio-frequency message from each of the at least two remote units, wherein the mobile station is within the building; selecting a first remote unit from the at least two remote units; wirelessly transmitting a signal from the controller to the first remote unit, wherein the signal includes an indication to switch a radio-frequency (RF) reverse-link from the first remote unit to the controller to a reduced signal interference mode; wherein selecting the first remote unit comprises; comparing signal strengths received by the at least two remote units; and based on the comparison, selecting the first remote unit, wherein the signal strength received by the first remote unit is less than the signal strength received by at least one of the remote units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a wireless distributed antenna system (WDAS) implemented within a building having a WDAS controller (WDASC) and a plurality of WDAS remote units distributed throughout a geographic coverage area for providing a wireless communications platform for a mobile station (MS), a method of reducing signal interference comprising:
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at the WDASC, detecting a plurality of signals from the MS, the signals having arrived from at least two of the plurality of WDAS remote units, wherein each of the plurality of the WDAS remote units comprises a variable gain amplifier, a user interface accessible via the Internet, and a rules engine, wherein the WDASC identifies each of the plurality of the WADS remote units based on a pseudo-random sequence (PN) of a decoded signal sent from each WDAS remote unit; at the WDASC, selecting a first remote unit from the at least two WDAS remote units; from the WDASC, wireless transmitting a first message to the first remote unit for shutting off a back-end reverse-link of the first remote unit; wherein the selection of the first remote units is based at least in part on a measure of incoming signal strength from the MS at the first remote unit. - View Dependent Claims (10, 11, 12, 13)
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Specification