光突发交换网络中的闭环竞争解析

Feedback-based contention resolution in OBS networks

为改善光突发交换网络(OBS)的性能,深入探讨了光突发交换网络中的闭环竞争解析,提出了OBS网络中的主动资源预留方案OBS-RED和显式竞争通知方案OBS-ECN。OBS-RED采用随机早期丢弃策略,即根据数据信道拥塞情况,随机早期地丢弃控制分组。OBS-ECN的实现需要OBS-RED的支持。在OBS-ECN中,不是随机丢弃控制分组,而是将这一信息显式地通知边缘节点,边缘节点再作相应的处理。OBS-RED与OBS-ECN的应用,有利于提高网络吞吐量和链路带宽资源利用率,大大减少数据突发的阻塞概率。

This paper deeply explores feedback-based contention resolution in optical burst switching (OBS) networks, and then presents an active resource reservation scheme OBS-RED, whose implementation is based on the policy of random early dropping in terms of the degree of congestion for data channel. Combining with OBS-RED, this paper also proposes an explicit contention notification mechanism OBS-ECN. Instead of dropping, the corresponding information is notified back to edge node.