Systems and methods for delay management in distributed antenna system with direct digital interface to base station
First Claim
1. A method for measuring downlink delay in a radio system, comprising:
- applying a digital representation of a pulse to a digital interface of the radio system;
marking the digital representation of the pulse with respect to a frame of digital data with a marker;
propagating the pulse in the radio system to an antenna, the radio system configured to convert the digital representation of the pulse to a radio frequency signal transmitted at the antenna;
measuring when the pulse occurs in the radio frequency signal based on the marker; and
determining a downlink propagation delay for the radio system between application of the digital representation of the pulse at the digital interface and transmission of the radio frequency signal at the antenna.
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Accused Products
Abstract
A method for measuring downlink delay in a radio system includes applying a digital representation of a Gaussian pulse to a digital interface of the radio system; marking the digital representation of the Gaussian pulse with respect to a frame of digital data with a marker; propagating the Gaussian pulse in the radio system to an antenna, the radio system configured to convert the digital representation of the Gaussian pulse to a radio frequency signal transmitted at the antenna; measuring when the Gaussian pulse occurs in the radio frequency signal based on the marker; and determining a downlink propagation delay for the radio system between application of the digital representation of the Gaussian pulse at the digital interface and transmission of the radio frequency signal at the antenna.
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Citations
67 Claims
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1. A method for measuring downlink delay in a radio system, comprising:
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applying a digital representation of a pulse to a digital interface of the radio system; marking the digital representation of the pulse with respect to a frame of digital data with a marker; propagating the pulse in the radio system to an antenna, the radio system configured to convert the digital representation of the pulse to a radio frequency signal transmitted at the antenna; measuring when the pulse occurs in the radio frequency signal based on the marker; and determining a downlink propagation delay for the radio system between application of the digital representation of the pulse at the digital interface and transmission of the radio frequency signal at the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for measuring downlink delay in a radio system, comprising:
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a waveform generator configured to generate a digital representation of a pulse and apply it to a digital interface of the radio system; wherein the waveform generator is further configured to mark the digital representation of the pulse with respect to a frame of digital data with a marker; wherein the radio system is configured to propagate the pulse and convert the digital representation of the pulse to a radio frequency signal transmitted at an antenna; a spectrum analyzer configured to measure when the pulse occurs in the radio frequency signal based on the marker; and wherein the system is configured to determine a downlink propagation delay for the radio system between application of the digital representation of the pulse at the digital interface and transmission of the radio frequency signal at the antenna. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for measuring uplink delay in a radio system, comprising:
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applying a pulse to a radio frequency signal input at an antenna; marking the pulse with respect to a frame of digital data with a marker; propagating the pulse in the radio system to a digital interface of the radio system, the radio system configured to convert the pulse to a digital representation of the pulse communicated at the digital interface in a digital signal; measuring when the pulse occurs in the digital signal based on the marker; and determining an uplink propagation delay for the radio system between application of the pulse to the radio frequency signal input at the antenna and communication of the digital representation of the pulse at the digital interface in the digital signal. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A system for measuring uplink delay in a radio system, comprising:
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a waveform generator configured to generate a pulse and apply it to an antenna of the radio system; wherein the waveform generator is further configured to mark the pulse with respect to a frame of digital data with a marker; wherein the radio system is configured to propagate the pulse and convert the pulse to a digital representation of the pulse output at a digital interface of the radio system; a spectrum analyzer configured to measure when the digital representation of the pulse occurs in a digital signal output from the digital interface of the radio system; and wherein the system is configured to determine an uplink propagation delay for the radio system between application of the pulse at the antenna of the radio system and output of the digital signal at the digital interface of the radio system. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method for measuring delay in a radio system, comprising:
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applying a first pulse to a radio frequency signal input at an antenna; marking the first pulse with respect to a first frame of digital data with a first marker; propagating the first pulse in the radio system to a digital interface of the radio system, the radio system configured to convert the first pulse to a first digital representation of the first pulse communicated at the digital interface in a first digital signal; looping back the first pulse in the radio system from the digital interface of the radio system to a radio frequency signal output at the antenna, the radio system configured to convert the first digital representation of the first pulse to a first radio frequency signal having the first pulse transmitted at the antenna; measuring when the first pulse occurs in the first radio frequency signal based on the first marker; and determining a round trip propagation delay for the radio system between application of the first pulse to the radio frequency signal input at the antenna and communication of the first radio frequency signal having the first pulse transmitted at the radio frequency signal output at the antenna. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. A system for measuring delay in a radio system, comprising:
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a first waveform generator configured to generate a first pulse and to apply the first pulse to an antenna of the radio system; wherein the first waveform generator is further configured to mark the first pulse with respect to a first frame of digital data with a first marker; wherein the radio system is configured to propagate the first pulse and convert the first pulse to a first digital representation of the first pulse output at a digital interface of the radio system; wherein the radio system is further configured to loop back the first pulse in the radio system from the digital interface of the radio system to a radio frequency signal output at the antenna and to convert the first digital representation of the first pulse to a first radio frequency signal having the first pulse transmitted at the antenna; a spectrum analyzer configured to measure when the first pulse occurs in the first radio frequency signal output at the antenna based on the first marker; wherein the system is configured to determine a round trip propagation delay for the radio system between application of the first pulse to the radio frequency signal input at the antenna and communication of the first radio frequency signal having the first pulse transmitted at the radio frequency signal output at the antenna. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67)
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Specification