網(wǎng)狀WDM網(wǎng)中雙鏈路失效的共享路徑保護(hù)設(shè)計(jì)
Shared-Path Protection Design for Double-Link Failures in WDM Mesh Networks
-
摘要: 該文研究了WDM網(wǎng)狀網(wǎng)中雙鏈路失效問題,在假定所有鏈路共享風(fēng)險鏈路組(Share Risk Link Group, SRLG)分離的條件下,提出了一種動態(tài)共享路徑保護(hù)(Dynamic Shared-Path Protection,DSPP)算法。DSPP能根據(jù)網(wǎng)絡(luò)狀態(tài)動態(tài)調(diào)整鏈路代價,為每條業(yè)務(wù)請求選擇一條最小代價的工作路由和兩條最小代價且SRLG分離的保護(hù)路由。仿真表明,DSPP不僅能完全保護(hù)雙鏈路失效,并且能在資源利用率、阻塞率和保護(hù)切換時間之間進(jìn)行性能折衷。Abstract: In this paper, a Dynamic Shared-Path Protection (DSPP) algorithm is proposed for double-link failures in WDM mesh networks on the condition that all links are assumed to be Share Risk Link Group (SRLG) disjoint. DSPP can dynamically adjust the link-cost according to the current state of the network, and it searches a minimum cost primary path and two minimum cost and SRLG-disjoint backup paths for each connection request, Under dynamic traffic with different load, the performances of DSPP have been investigated via simulations. The results show that DSPP not only can completely protect double-link failures but also can make the tradeoffs between the resource utilization ratio, blocking ratio, and protection-switching time.
-
計(jì)量
- 文章訪問數(shù): 2135
- HTML全文瀏覽量: 122
- PDF下載量: 767
- 被引次數(shù): 0
下載:
