| US 7,373,104 B2 | ||
| Signal relay apparatus and method for a wireless network | ||
| Youiti Kado, Kyoto (Japan) | ||
| Assigned to Oki Electric Industry Co., Ltd., Tokyo (Japan) | ||
| Filed on Nov. 30, 2004, as Appl. No. 10/999,007. | ||
| Claims priority of application No. 2003-406993 (JP), filed on Dec. 05, 2003. | ||
| Prior Publication US 2005/0122931 A1, Jun. 09, 2005 | ||
| Int. Cl. H04B 3/36 (2006.01) | ||
| U.S. Cl. 455—7 [455/11.1; 455/21; 455/18; 370/328] | 12 Claims |
| 1. An apparatus for relaying signals in a wireless communication network, comprising:
a plurality of devices for relaying signals to and from respective distant nodes in the wireless communication network, said
plurality of devices including at least one antenna device;
a receiver for receiving a first signal through one of said devices and selectively demodulating said first signal;
a transmitter for selectively modulating a second signal and transmitting said second signal through another one of said devices;
and
an intermediate unit for receiving the first signal from the receiver and supplying the first signal as the second signal
to the transmitter; wherein said intermediate unit includes an amplifier and a buffer; and
a control unit for controlling the intermediate unit to operate in a first mode in which the amplifier is used to amplify
the first signal at its received frequency, without demodulation in the receiver, thereby producing the second signal, which
is transmitted without modulation in the transmitter, and a second mode in which the buffer is used to store the first signal
after demodulation in the receiver, and the transmitter generates a carrier signal as the second signal, modulates the carrier
signal according to the demodulated and stored first signal, and transmits the modulated carrier signal.
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