Wireless communication system, base station, and wireless communication method

A wireless communication system, comprising:

• a base station;
• and
• a terminal station,
• wherein said base station extracts paths that have a power level that exceeds a predetermined threshold value from delay profiles of said terminal station as available paths, selects a path having a maximum power or a first path from said available paths as a reference path, calculates, as a transmission timing control signal, a time difference between an arrival time of said reference path and a predetermined maximum arrival time, and when said base station does not detect said reference path, said base station sets, as said transmission timing control signal, a signal that instructs said terminal station to maintain a transmission timing,
• wherein said terminal station adjusts the transmission timing to said base station according to said time difference, and
• wherein said base station transmits said transmission timing control signal to said terminal station when said base station determines that said terminal station needs to change the transmission timing and does not transmit said transmission timing control signal to said terminal station when said base station does not detect said reference path.

A base station, said base station:

• extracts paths having a power level that exceeds a predetermined threshold value from delay profiles of a terminal station as available paths;
• selects a path having a maximum power or a first path from said available paths as a reference path;
• calculates, as a transmission timing control signal, a time difference between an arrival time of said reference path and a predetermined maximum arrival time;
• and
• when said base station does not detect said reference path, said base station sets, as said transmission timing control signal, a signal that instructs said terminal station to maintain a transmission timing,
• wherein said base station transmits said transmission timing control signal to said terminal station when said base station detects said reference path and does not transmit said transmission timing control signal to said terminal station when said base station does not detect said reference path.

A base station, said base station:

• extracts paths having a power level that exceeds a predetermined threshold value from delay profiles of a terminal station as available paths;
• selects a path having a maximum power or a first path from said available paths as a reference path;
• calculates, as a transmission timing control signal, a time difference between an arrival time of said reference path and a predetermined maximum arrival time;
• and
• when said base station does not detect said reference path, said base station sets, as said transmission timing control signal, a signal that instructs said terminal station to maintain a transmission timing,
• wherein said base station transmits said transmission timing control signal to said terminal station when said base station determines that said terminal station needs to change the transmission timing and does not transmit said transmission timing control signal to said terminal station when said base station does not detect said reference path.

A wireless communication method, the method comprising:

• extracting paths having a power level that exceeds a predetermined threshold value from delay profiles of a terminal station as available paths at a base station;
• selecting a path having a maximum power or a first path from said available paths as a reference path at said base station;
• calculating, as a transmission timing control signal, a time difference between an arrival time of said reference path and a predetermined maximum arrival time, and when said base station does not detect said reference path, said base station setting, as said transmission timing control signal, a signal that instructs said terminal station to maintain a transmission timing;
• and
• adjusting the transmission timing to said base station according to said time difference at said terminal station,
• wherein said base station transmits said transmission timing control signal to said terminal station when said base station detects said reference path and does not transmit said transmission timing control signal to said terminal station when said base station does not detect said reference path.