抗毀WDM網(wǎng)中支持QoS的選路和波長(zhǎng)分配算法
A QoS-based routing and wavelength assignment algorithm in survivable WDM optical transport networks
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摘要: 該文首先探討了抗毀WDM網(wǎng)中支持QoS的分層圖模型,在此基礎(chǔ)上提出一種抗毀WDM網(wǎng)中支持QoS的選路和波長(zhǎng)分配算法。該算法根據(jù)上層業(yè)務(wù)不同的QoS要求,對(duì)其光路建立請(qǐng)求區(qū)別對(duì)待,以滿(mǎn)足它們不同的阻塞率和恢復(fù)率要求。計(jì)算機(jī)仿真結(jié)果表明該算法既滿(mǎn)足了上層業(yè)務(wù)不同的QoS要求,同時(shí)又充分利用了有限的網(wǎng)絡(luò)資源,使全網(wǎng)的平均阻塞率降低。
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關(guān)鍵詞:
- 分層圖; 服務(wù)質(zhì)量; 生存性; 路由選擇和波長(zhǎng)分配算法
Abstract: This paper considers the survivability of WDM layer according to the client layers QoS requirements. A novel priority-based protection strategy is presented, and a QoS-based layered graph method is developed in the WDM optical transport network to reduced the blocking probability of the connection request. Based on them, a QoS-based RWA strategy in survivable WDM networks is proposed. Simulation results of the network performance in different dynamic traffic load are given. The results show that this algorithm can not only meet the different QoS requirements of the client layers service, but also utilize the finite networking resources efficiently with the reduced blocking probability. -
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