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On Finding the Multicast Protection Tree Considering SRLG in WDM Optical Networks
Yonggang Li,Yaohui Jin,Lemin Li,Longjiang Li 한국전자통신연구원 2006 ETRI Journal Vol.28 No.4
In this letter, a new sharing mechanism, SRLG sharing, is proposed, which allows the links of the same shared risk link group (SRLG) in a primary light tree to share protections in WDM optical networks. In previous studies, how to share spare resources with SRLG constraints has not been studied in multicast optical networks. In this letter, considering SRLG sharing, we propose a novel algorithm –multicast with SRLG sharing (MSS)– to establish a protection light tree. Finally, the algorithm MSS and the algorithm multicast with no SRLG sharing (MNSS) are compared through a simulation to show that our new sharing scheme of SRLG sharing is more efficient than that of no SRLG sharing in terms of spare resource utilization and blocking probability.
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China Urban Economic Reform and Development in the Past 30 Years
Xiaodong Fu,Jing Yu,Yaohui Li 서울시립대학교 도시과학연구원 2009 도시과학국제저널 Vol.13 No.2
It has been already 30 years since China began her reforms and opened to the outside world. During these recent 30 years, China’s urban economy has not only gained rapid expansion on a total quantity scale, but has also made qualitative leaps and remarkable upgrades in economic system and operational mechanism. This paper studies transitional process of urban economic reform as well as step-by-step liberation of urban economic elements during the recent 30 years in order to explore the new mode of China’s urban economic development. Based on the relevant statistical data of China’s urban economy and the corresponding institutional analysis, it presents that China’s urban economic system has gradually shifted from planned allocation to a more open market, that the utilization of urban function has changed from monomer to urban group, that the measure of urban economic level has transformed from simple output to the whole urban value, that the new impetus of urban economic development has shifted to urban management, that urban development concept and guidance has broken through the former size limitation.
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