Patent ID: 7733825

Claim:
A radio over fiber (ROF) link apparatus for providing a stable TDD wireless service for a time division duplexing (TDD) baseband signal, the ROF link apparatus comprising: a central access platform (CAP) for: receiving various kinds of data including the TDD baseband signal from upper layers, multiplexing the data, electro-optically converting the multiplexed data, and transmitting the converted data as downstream data through an optical fiber; and a remote access unit (RAU) for: receiving the downstream data through the optical fiber, opto-electrically converting the received downstream data to the multiplexed data, demultiplexing the multiplexed data, performing a wireless access process of the demultiplexed data, and transmitting the wireless access processed data to a wireless local area network (WLAN) service terminal through an antenna; wherein the CAP does not have WLAN Access Points (APs) disposed therein for TDD communications and the RAU includes a TDD access point (AP) for processing a TDD baseband signal among the demultiplexed signals to an RF signal for WLAN communication; and wherein the CAP includes: a TDD processing unit for receiving the TDD baseband signal from the upper layer and downstream processing the received TDD baseband signal; a plurality of radio frequency (RF) processing units for receiving RF signals from the upper layers and downstream processing the received RF signals; a multiplexer for multiplexing signals separately output from the TDD processing unit to the multiplexer and from the plurality of RF processing units to the multiplexer into a single electrical signal; a first electro-optical converter for converting the electrical signals multiplexed by the multiplexer to an optical signal; and a transmitter for transmitting the converted optical signal through the optical fiber.