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Relatively large transmitter/receiver tuning overhead is one major difficulty when designing a medium access control scheme for a single hop passive star-coupled WDM optical network. Most schemes proposed so far have ignored the tuning overhead. To overcome this difficulty, two algorithms, namely continuous channel scheduling (CCS) and continuous channel-minimum scheduling latency (CC-MSL) is proposed to reduce the negative impact of tuning overhead as much as possible. Extensive simulations have been conducted. And the results show that there is significant improvement in average delay, which is achieved by the new proposed algorithms.