Abstract
In the recent large scale deployment of 10 gigabit passive optical network (XG(S)-PON), upstream crosstalk was reported as a major cause of service degradation in some of the coexisting gigabit-capable passive optical network (GPON) optical network units (ONUs). Diagnosis results showed the crosstalk was from the strong side mode noise of some XG(S)-PON ONU transmitters. This paper proposes a crosstalk control mechanism using coordinated transmission in the coexisting PON upstream wavelengths. The proposal improves PON upstream dynamic bandwidth assignment (DBA) by taking the received upstream signal bit error rate (BER) into consideration. The crosstalk control is conducted by scheduling strong XG(S)-PON ONUs and weak GPON ONUs in non-overlapped timeslots for upstream transmission. Simulation results validate our proposal performance in upstream crosstalk control.
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