Propagation delay time adjustment method, propagation delay time adjustment system, propagation delay time adjustment device, storage medium stored with propagation delay time adjustment program, and node device

A propagation delay time adjustment system for adjusting the propagation delay time occurring within a reception circuit for each channel of a center node device configuring a 1-to-N communications system in which communication is performed between the center node device and N (N being an integer of 2 or more) individual edge node devices using a Synchronous Code Division Multiplexing method,

• the center node device comprising a main control section that sequentially adjusts the propagation delay times occurring within the reception circuit for each of the channels one-by-one, and each of the edge node devices comprising an auxiliary control section that controls the propagation delay time in cooperation with the main control section, wherein:
• the main control section comprising a transmission permission signal transmission section that transmits a transmission permission signal in which a spreading code has been specified for the edge node device;
• the auxiliary control section comprising a transmission control section that, when the transmission permission signal is received, repeatedly transmits a sync signal that has been coded using the spreading code;
• the main control section comprising:
• a reception phase control section that changes a reception phase of the reception circuit corresponding to the edge node device;
• a reception validity determining section that, for a fixed signal period in a reception signal from the edge node device, determines whether or not a signal has been validly received based on a spreading demodulation output signal from the reception circuit;
• an optimum reception phase determining section that determines the optimum reception phase for which valid reception can be made within an oscillated range of the reception phase;
• and
• a reception phase setting section that sets the optimum reception phase as the reception phase for the reception circuit.

A propagation delay time adjustment device for adjusting the propagation delay time occurring within a reception circuit for each channel of a center node device configuring a 1-to-N communications system in which communication is performed between the center node device and N (N being an integer of 2 or more) individual edge node devices using a Synchronous Code Division Multiplexing method,

• the center node device comprising a main control section that sequentially adjusts the propagation delay times occurring within the reception circuit for each of the channels one-by-one, wherein the main control section comprising:
• a transmission permission signal transmission section that transmits a transmission permission signal in which a spreading code has been specified for the edge node device;
• a reception phase control section that changes a reception phase of the reception circuit corresponding to the edge node device;
• a reception validity determining section that, for a fixed signal period in a reception signal from the edge node device, determines whether or not a signal has been validly received based on a spreading demodulation output signal from the reception circuit;
• an optimum reception phase determining section that determines the optimum reception phase for which valid reception can be made within an oscillated range of the reception phase;
• and
• a reception phase setting section that sets the optimum reception phase as the reception phase for the reception circuit.

A storage medium stored with a propagation delay time adjustment program for adjusting the propagation delay time occurring within a reception circuit for each channel of a center node device configuring a 1-to-N communications system in which communication is performed between the center node device and N (N being an integer of 2 or more) individual edge node devices using a Synchronous Code Division Multiplexing method,

• the center node device comprising a main control section that sequentially adjusts the propagation delay times occurring within the reception circuit for each of the channels one-by-one, wherein the program causes the main control section to function as:
• a transmission permission signal transmission section that transmits a transmission permission signal in which a spreading code has been specified for the edge node device;
• a reception phase control section that changes a reception phase of the reception circuit corresponding to the edge node device;
• a reception validity determining section that, for a fixed signal period in a reception signal from the edge node device, determines whether or not a signal has been validly received based on a spreading demodulation output signal from the reception circuit;
• an optimum reception phase determining section that determines the optimum reception phase for which valid reception can be made within an oscillated range of the reception phase;
• and
• a reception phase setting section that sets the optimum reception phase as the reception phase for the reception circuit.