Node unit capable of measuring delay and distributed antenna system including the same
First Claim
1. A node unit of a digital radio frequency (RF) transport system, the node unit comprising at least one processor and at least one memory to implement:
- a delay measuring part configured to transmit a first test signal to a first adjacent node unit and measure a first round trip delay with respect to the first adjacent node unit based on the first test signal looped back by the first adjacent node unit; and
a delay providing part configured to delay loop-back of a second test signal by the first round trip delay,wherein the second test signal is transmitted from a second adjacent node unit and looped back by the node unit.
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Abstract
A node unit of distributed antenna system, the node unit comprises a delay measuring part configured to transmit a first test signal for delay measurement to an upper adjacent node unit and detect the first test signal looped back via the upper adjacent node unit and measure a round trip delay between the node unit and the upper adjacent node unit, and a delay providing part disposed on a signal transmission path through which a second test signal for delay measurement, to be transmitted from a lower adjacent node unit, is to be looped back to the lower adjacent node unit, and configured to provide a delay corresponding to the round trip delay.
9 Citations
15 Claims
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1. A node unit of a digital radio frequency (RF) transport system, the node unit comprising at least one processor and at least one memory to implement:
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a delay measuring part configured to transmit a first test signal to a first adjacent node unit and measure a first round trip delay with respect to the first adjacent node unit based on the first test signal looped back by the first adjacent node unit; and a delay providing part configured to delay loop-back of a second test signal by the first round trip delay, wherein the second test signal is transmitted from a second adjacent node unit and looped back by the node unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification