Network apparatus for eliminating interference between transmission interfaces and method thereof

Abstract

A network device for eliminating interference among transmitting ports comprises a plurality of transmitting ports and at least a cross-port near-end crosstalk canceller. The cross-port near-end crosstalk canceller is a special transmitting port which is coupled in a plurality of transmitting ports and used for eliminating the near-end crosstalk interference of other transmitting ports in a plurality of transmitting ports. The cross-port near-end crosstalk canceller is operated in time domain or frequency domain. In an embodiment, the network device is a switch.

Description

technical field

[0001] The invention relates to a network device and its related method, in particular to a network device and its related method for eliminating interference between transmission ports. Background technique

[0002] 1Gbase-T / 10Gbase-T Ethernet (Ethernet) system uses four pairs of unshielded twisted pair (Unshielded Twisted Pair, UTP) for full duplex (full duplex) bidirectional transmission, therefore, a transmission port will contain multiple channels, for example four channels. Usually, the signal transmitted by the transmitter of one channel (that is, a pair of unshielded twisted pair) will be interfered by the echo (Echo) caused by the receiver itself, and by the near-end string formed by the receivers of other channels. Tone (near end crosstalk, NEXT) interference. In the digital signal processing of the receiver, these interferences must be eliminated. Generally speaking, the least mean square finite impulse response canceller (LMS update FIRcanceller...

Images