US 12,750,149 B2 · Apparatus and method for two-way delay error compensation in communication system

Abstract

Proposed is an operation method for two-way delay error compensation, the method including first to sixth steps. In the first step, a first wavelength is set as a signal wavelength for a master and a third wavelength is set as a signal wavelength for a slave. In the second step, first, second, third, and fourth time points are identified by using PTP. In the third step, a second wavelength is set as a signal wavelength for the master and the second wavelength is set for the slave. In the fourth step, fifth, sixth, seventh, and eighth time points are identified by using the PTP. In the fifth step, a delta value for a two-way delay error is identified on the basis of the first to eighth time points. In the sixth step, a compensation value of the two-way delay error is identified on the basis of the delta value.

Claims17

Dependent claims

An operation method for two-way delay error compensation in a communication system, the operation method comprising:

setting a first wavelength (λ1) as a signal wavelength for a master and a third wavelength (λ3) as a signal wavelength for a slave in a first step;
identifying a first time point (t1), a second time point (t2), a third time point (t3), and a fourth time point (t4) by using Precision Time Protocol (PTP) in a second step;
setting a second wavelength (λ2) as a signal wavelength for the master and the second wavelength (λ2) for the slave in a third step;
identifying a fifth time point (t5), a sixth time point (t6), a seventh time point (t7), and an eighth time point (t8) by using the PTP in a fourth step;
identifying a delta value for a two-way delay error on the basis of the first time point to the eighth time point in a fifth step;
and
identifying a compensation value of the two-way delay error on the basis of the delta value for the two-way delay error in a sixth step,
wherein the delta value for the two-way delay error is determined by the following Equation:
Delta={(t4−t3)+(t6−t5)−(t2−t1)−(t8−t7)}/2. [Equation]

6 more elements

An apparatus for two-way delay error compensation in a communication system, the apparatus comprising:

a transceiver;
and
a controller operably connected to the transceiver,
wherein the controller is configured to
set a first wavelength (λ1) as a signal wavelength for a master and a third wavelength (λ3) as a signal wavelength for a slave,
identify a first time point, a second time point, a third time point, and a fourth time point by using Precision Time Protocol (PTP),
set a second wavelength (λ2) as a signal wavelength for the master and the second wavelength (λ2) for the slave,
identify a fifth time point, a sixth time point, a seventh time point, and an eighth time point by using the PTP,
identify a delta value for a two-way delay error on the basis of the first time point to the eighth time point, and
identify a compensation value of the two-way delay error on the basis of the delta value for the two-way delay error,
wherein the delta value for the two-way delay error is determined by the following Equation:
Delta
=
{
(
t
⁢
4
-
t
⁢
3
)
+
(
t
⁢
6
-
t
⁢
5
)
-
(
t
⁢
2
-
t
⁢
1
)
-
(
t
⁢
8
-
t
⁢
7
)
}
/
2.
[
Equation
]

56 more elements

Dependencies are inferred from the claim text.

Apparatus and method for two-way delay error compensation in communication system

Life of this patent

Apparatus and method for two-way delay error compensation in communication system

Life of this patent

Abstract

Claims17