Asymmetric duplex transmission device and switching system thereof

A switching system employing an asymmetric duplex transmission device, comprising:

• a master device, comprising:
• an oscillator;
• a first phase lock loop coupled to the oscillator;
• at least one packet generator, each packet generator outputting at least one package data;
• a matrix switching module coupled to the packet generator, the matrix switching module transmitting at least one data stream to the packet generator to be converted into the package data;
• and
• at least one master transceiver module, each coupled to the first phase lock loop and one of the at least one packet generator, each master transceiver module converting the package data into the forward data;
• and
• at least one slave device, each of which is coupled to one of the master transceiver modules and has a slave transceiver module;
• wherein the master transceiver module transmits a forward clock to the slave transceiver module through a first transmission medium, transmits a forward data to the slave transceiver module through a second transmission medium, and receives a backward data transmitted from the slave transceiver module through a third transmission medium, without receiving any backward clock from the slave transceiver module, wherein each of the forward data transmitted by the master transceiver module to the slave transceiver module, the forward clock transmitted by the master transceiver module to the slave transceiver module, and the backward data transmitted by the slave transceiver module and received by the master transceiver module is a serial data, and wherein the forward clock and the forward data are transmitted separately to the slave transceiver module;
• and
• wherein the first phase lock loop provides a first clock according to a clock signal generated by the oscillator, the first clock being used by the master transceiver module to transmit the forward clock and the forward data to the at least one slave device, and the first clock being used by the master transceiver module to receive the serial backward data from the at least one slave device.

A method implemented in an asymmetric duplex transmission system having a master device and a slave device coupled to each other by a plurality of transmission media, the method comprising:

• a phase lock loop of the master device generating a first clock according to a clock signal generated by an oscillator;
• a master transceiver module of the master device transmitting a forward clock to the slave device through a first transmission medium using the first clock, and transmitting a forward data to the slave device through a second transmission medium using the first clock, wherein each of the forward data transmitted by the master transceiver module to the slave transceiver module and the forward clock transmitted by the master transceiver module to the slave transceiver module is a serial data, and wherein the forward clock and the forward data are transmitted separately to the slave transceiver module;
• and
• the master transceiver module receiving a backward data from the slave device through a third transmission medium using the first clock, without receiving any backward clock from the slave transceiver module, wherein the backward data received by the master transceiver module from the slave transceiver module is a serial data.