Transmission wireless station, reception wireless station, wireless communication system and wireless communication method

Abstract

The object of the present invention is to achieve smooth hand-over in the radio communication system with a hierarchical cell structure that executes data transmission using orthogonal carrier frequency bands. In the sending radio station to arrange sending symbols in a frequency axis and send signals using one or a plurality of carrier frequency bands, on detecting there having been received one or more carrier frequency band signals pertaining to a transmission system other than that of its own station (SO1), the symbol synchronization will be detected based on the received signal (SO2), and the signal to be sent, will be sent at the symbol sending timing derived based on the detected symbol synchronization (SO3). Therefore, by the correlation between the carrier frequency band signals of the transmission system other than that of its own station and the signal of the station of its own, signals causing no mutual interference can be sent at the symbol sending timing, while the receiving radio station can simultaneously receive signals of a plurality of carrier frequency bands and demodulate the signals. For this reason, smooth hand-over can be achieved.

Description

technical field [0001] The present invention relates to a hierarchical network structure (a so-called network structure in a network), a transmitting wireless station, a receiving A wireless station, the wireless communication system and a wireless communication method. Background technique [0002] In FIG. 1, it is shown that using more than one transmitting wireless station covering an area 90 of a certain range, can receive a signal transmitted from the transmitting wireless station and form an equivalent isotropic transmission power (EIRP) compared with the transmitting wireless station. ) a wireless transmission system of a transmission wireless station of a small and small-scale network 80 . In addition, in this specification, one or more transmitting wireless stations covering a certain area 90 are described as "large-scale network transmitting wireless stations," which will form a small-scale network 80 with a smaller EIRP than that of a large-scale network transmit...

AI Technical Summary

Problems solved by technology

at the time of the handover figure 2 In the receiving wireless station 11, it is difficult to realize a smooth handover from the frequency band f1 to the frequency band f2 or from the frequency band f2 to the frequency band f1 because it is necessary to demodulate the received signal after the switcher 14 temporarily switches from the existing frequency band to the desired frequency band.

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