Timing adjustment method, receiving station, and transmitting station in wireless communication system, and wireless communication system
First Claim
1. A wireless communication system wherein signals are transmitted and received between a first radio station and a second radio station, comprising:
- the first radio station including;
a measurer that measures a difference between a reference timing of the first radio station and a reception timing of a signal transmitted from the second radio station;
a timing adjustment signal generator that generates a first signal including data on the difference; and
a transmitter that transmits the first signal including the data on the difference; and
the second radio station including;
a signal generator that generates a second signal in a time domain using an orthogonal transformation;
a timing adjustment signal extractor that extracts the data on the difference included in the first signal transmitted from the first radio station, as extracted difference data;
a transmission timing controller that determines a correction amount of a signal arrangement phase and that of a transmission timing based on the extracted difference data;
a phase controller that controls the signal arrangement phase of the second signal in the time domain based on the correction amount of the signal arrangement phase; and
a timing adjustor that controls the transmission timing of the second signal in which the signal arrangement phase is controlled based on the correction amount of the transmission timing, andwherein using the controlled transmission timing, the second radio station transmits the second signal to the first radio station.
1 Assignment
0 Petitions
Accused Products
Abstract
A discontinuous change in a transmission timing in a time domain, which is caused by a transmission timing adjustment processing of an OFDMA uplink or the like, brings about a discontinuous rotation of a signal phase in a frequency domain, resulting in reduced communication quality. A wireless communication system of the present invention allows the signal phase of the frequency domain in a receiving station to be continuous before and after the timing adjustment processings by controlling a signal sequence in a transmission signal after conversion in the time domain in synchronization with the timing adjustment processing.
-
Citations
8 Claims
-
1. A wireless communication system wherein signals are transmitted and received between a first radio station and a second radio station, comprising:
-
the first radio station including; a measurer that measures a difference between a reference timing of the first radio station and a reception timing of a signal transmitted from the second radio station; a timing adjustment signal generator that generates a first signal including data on the difference; and a transmitter that transmits the first signal including the data on the difference; and the second radio station including; a signal generator that generates a second signal in a time domain using an orthogonal transformation; a timing adjustment signal extractor that extracts the data on the difference included in the first signal transmitted from the first radio station, as extracted difference data; a transmission timing controller that determines a correction amount of a signal arrangement phase and that of a transmission timing based on the extracted difference data; a phase controller that controls the signal arrangement phase of the second signal in the time domain based on the correction amount of the signal arrangement phase; and a timing adjustor that controls the transmission timing of the second signal in which the signal arrangement phase is controlled based on the correction amount of the transmission timing, and wherein using the controlled transmission timing, the second radio station transmits the second signal to the first radio station. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for adjusting a timing for synchronizing a reception signal in a wireless communication system for transmitting and receiving signals between a first radio station and a second radio station, the method causing:
- the first radio station to execute operations comprising;
measuring a difference between a reference timing of the first radio station and a reception timing of a signal transmitted from the second radio station; generating a first signal including difference data conveying the difference; and transmitting the first signal including the difference data, and the second radio station to execute operations comprising; generating a second signal in a time domain using an orthogonal transformation; extracting the difference data included in the first signal transmitted from the first radio station, as extracted difference data; determining a correction amount of a signal arrangement phase and that of a transmission timing, based on the extracted difference data; controlling the signal arrangement phase of the second signal in the time domain, based on the correction amount of the signal arrangement phase; and controlling the transmission timing of the second signal in which the signal arrangement phase is controlled, based on the correction amount of the transmission timing; wherein using the controlled transmission timing, the second radio station transmits the second signal to the first radio station.
- the first radio station to execute operations comprising;
Specification