Apparatus and method for implementing efficient redundancy and widened service coverage in radio access station system

A Radio Access Station (RAS) system of a Time Division Duplex (TDD) scheme supporting a predetermined number (M) of Frequency Assignments (FAs) and a predetermined number (K) of sectors, the RAS system comprising:

• a channel card unit connected to a router via ethernet-based Layer 2 (L2) switching;
• a transceiver unit for modulating digital data stream provided from the channel card unit into a transmission Radio Frequency (RF) signal, and for demodulating a received RF signal into digital data stream;
• a high-power amplifier unit for amplifying a signal modulated by the transceiver unit;
• and
• a repeater interface for respectively down-converting signals having the first center frequency received from the channel card unit into baseband signals, respectively up-converting the down-converted signals into signals respectively having the center frequencies different from one another, synthesizing the upconverted signals into one signal, and transmitting the synthesized signal to a repeater.

A method of communications in a Radio Access Station (RAS) system based on a Time Division Duplex (TDD) scheme supporting a predetermined number (M) of Frequency Assignments (FAs) and a predetermined number (K) of sectors, the method comprising the steps of:

• (A-1) sensing a failure of any one among transceivers and high-power amplifiers;
• (A-2) connecting a receive path to a redundancy transceiver in a case of sensing a failure of any one among the transceivers;
• and
• (A-3) switching a transmission path to the redundancy transceiver and a redundancy high-power amplifier in a case of sensing a failure of any one among the transceivers, and switching a transmission path to the redundancy high-power amplifier in a case of sensing a failure of any one among the high-power amplifiers,
• wherein the RAS system comprises a transceiver unit including an (M×K) number of the transceivers and the redundancy transceiver;
• and a high-power amplifying unit including an (M×K) number of the high-power amplifiers and the redundancy high-power amplifier.

A method of communications in a Radio Access Station (RAS) system based on a Time Division Duplex (TDD) scheme supporting a predetermined number (M) of Frequency Assignments (FAs) and a predetermined number (K) of sectors, the method comprising the steps of:

• (B-1) down-converting signals having the first center frequency respectively received from a channel card unit into baseband signals, respectively;
• (B-2) up-converting the baseband signals into signals respectively having the center frequencies different from one another, respectively;
• and
• (B-3) synthesizing the up-converted signals into one signal, and transmitting the synthesized signal to a repeater,
• wherein the RAS system comprises the channel card unit, a transceiver unit, a high-power amplifier unit, and a repeater interface.