Contention resolution considering multicast traffic in optically burst-switched WDM networks
Contention resolution considering multicast traffic in optically burst-switched WDM networks
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DOI：
10.1007/s11107-011-0346-7
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发表时间：
2012-04
影响因子：
1.7
通讯作者：
K. Hirata;Minoru Kawahara
中科院分区：
文献类型：
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作者：
K. Hirata;Minoru Kawahara
提出了一种在光突发交换（OBS）网络中考虑组播业务的竞争解决方案。在OBS网络中，对于单播突发，可以通过偏转路由来避免竞争。然而，偏转路由不能应用于多播突发，因为多播突发是沿着作为固定的树形路由的沿着光树传输的。因此，组播突发的丢失概率通常很高。为了解决这个问题，该方案引入了一个巧妙的偏移时间分配策略，完全避免了竞争的组播突发由于单播突发的传输，通过战略性地分配额外的偏移时间。此外，在所提出的方案中，单播突发避免了与偏转路由的竞争。通过仿真实验，我们表明，该方案提高了单播和组播突发的丢失概率。
This paper proposes a contention resolution scheme considering multicast traffic in optical burst switching (OBS) networks. In OBS networks, for unicast bursts, contention can be avoided by deflection routing. However, deflection routing cannot be applied to multicast bursts because multicast bursts are transmitted along light-trees which are fixed, tree-shaped routes. Therefore, the loss probability of multicast bursts is generally high. To resolve this problem, the proposed scheme introduces an ingenious offset time assignment strategy which completely avoids contention of multicast bursts due to transmissions of unicast bursts by strategically assigning additional offset times. Furthermore, in the proposed scheme, unicast bursts avoid contention with deflection routing. Through simulation experiments, we show that the proposed scheme improves the loss probabilities of both of unicast bursts and multicast bursts.