Method for detecting synchronization deviation between communication stations

A method for detecting a synchronization deviation between communication stations, the method being a method for detecting, in first and second communication stations selected from among two or more communication stations that are connected to each other via a communication method to be capable of communicating with each other, a deviation in time between first time information that is transmitted from a transmitter (X) of the first communication station (A) and received by the first communication station and by the second communication station (B) and second time information that is transmitted from a transmitter (Y) of the second communication station (B) and received by the first communication station (A) and by the second communication station, the communication stations each clocking time in a corresponding manner, wherein the first time information contains first integrated phase information or first phase time information, and the second time information contains second integrated phase information or second phase time information, and

• transmitting empty information in a case of transmission of undetermined time information among transmission time information (TXA) from the first communication station to the second communication station, transmission time information (TYB) from the second communication station to the first communication station, reception time (TXB) of a clock at the second communication station in a transmission from the first communication station to the second communication station, and reception time (TYA) of a clock at the first communication station in a transmission from the second communication station to the first communication station, wherein TXA is a first phase time, TXB is a second phase time, TYA is a third phase time and TYB is a fourth phase time, the method comprising, in a process including
• (1) a step in which the first communication station transmits a signal for synchronization and records the transmission time T1XA of the signal for synchronization,
• (2) a step in which the second communication station receives the signal for synchronization and T1XA and records the reception time T1XB of the signal for synchronization,
• (3) a step in which the second communication station transmits a signal for synchronization and T1XB and records the transmission time T1YB of the signal for synchronization,
• (4) a step in which the first communication station receives the signal for synchronization and T1XB and records the reception time T1YA of the signal for synchronization,
• (5) a step in which the first communication station transmits at least T1XA and T1YA,
• (6) a step in which the second communication station receives at least T1XA and T1YA,
• (7) a step in which the second communication station transmits at least T1YB, and
• (8) a step in which the first communication station receives at least T1YB, for a set of input values of T1XA, T1XB, T1YA, and T1YB:
• deriving, at each station, a transfer time of signal between the first communication station and the second communication station on the basis of an arithmetic mean of an increase (ΔTXB-A) from T1XA to T1XB and an increase (ΔTYA-B) from T1YB to T1YA;
• or
• determining the deviation in time between the first communication station and the second communication station by subtracting the increase (ΔTXB-A) from the transfer time or by subtracting the transfer time from the increase (ΔTYA-B).

A method for detecting a synchronization deviation between communication stations, the method being a method for detecting, in first and second communication stations selected from among two or more communication stations that are connected to each other via a communication method to be capable of communicating with each other, a deviation in clock phase between a clock A for generating first time information that is transmitted from a transmitter (X) of the first communication station (A) and received by the first communication station and by the second communication station (B) and a clock B for generating second time information that is transmitted from a transmitter (Y) of the second communication station (B) and received by the first communication station (A) and by the second communication station, the communication stations each clocking time in a corresponding manner, wherein the wherein the first time information contains first integrated phase information or first phase time information, and the second time information contains second integrated phase information or second phase time information,

• the second communication station receiving a first communication station signal that is transmitted from the first communication station and is synchronized with a clock X signal of the first communication station,
• the first communication station receiving a second communication station signal that is transmitted from the second communication station and is synchronized with a clock Y signal of the second communication station,
• the method comprising, if the first and second communication station signals have a phase difference that is converted into a predetermined common frequency:
• (1) by the first communication station, transmitting the first communication station signal, receiving the transmitted first communication station signal, and measuring a phase difference (Φ1XA) between the received first communication station signal and a clock A signal from the first communication station;
• (2) by the second communication station, receiving the first communication station signal and measuring a phase difference (Φ1XB) between the received first communication station signal and a clock B signal from the second communication station;
• (3) by the second communication station, transmitting the second communication station signal and the phase difference (Φ1XB), receiving the transmitted second communication station signal, and measuring a phase difference (Φ1YB) between the received second communication station signal and the clock B signal from the second communication station;
• (4) by the first communication station, receiving the second communication station signal and the phase difference (Φ1XB) and measuring a phase difference (Φ1YA) between the received second communication station signal and the first communication station signal;
• (5) by the first communication station, transmitting the first communication station signal, the phase difference (Φ1XA), and the phase difference (Φ1YA) and receiving the transmitted first communication station signal;
• (6) by the second communication station, receiving at least the phase difference (Φ1XA) and the phase difference (Φ1YA) among the first communication station signal, the phase difference (Φ1XA), and the phase difference (Φ1YA);
• (7) by the second communication station, transmitting at least the phase difference (Φ1YB);
• (8) by the first communication station, receiving at least the phase difference (Φ1YB);
• and
• for a phase difference ΦX obtained by subtracting the phase difference (Φ1XA) from the phase difference (Φ1XB) and a phase difference ΦY obtained by subtracting the phase difference (Φ1YB) from the phase difference (Φ1YA), deriving a phase difference between the first communication station and the second communication station on the basis of an arithmetic mean of the phase differences ΦX and ΦY, and deriving a phase difference due to a deviation in time at the second communication station from time of the first communication station on the basis of an arithmetic mean of phase differences Φ1X and −ΦY, wherein Φ1XA is a first integrated phase, Φ1XB is a second integrated phase, Φ1YA is a third integrated phase and Φ1YB is a fourth integrated phase.