随着光纤传输介质的出现,通信领域也进入了新的技术革新与发展黄金期。尤其在同步数字传输(Synchronous Digital Hierarchy,SDH)与波分复用(Wavelength Division Multiplexing,WDM)光纤技术日渐成熟的背景下,光纤技术逐步取代了过去的...随着光纤传输介质的出现,通信领域也进入了新的技术革新与发展黄金期。尤其在同步数字传输(Synchronous Digital Hierarchy,SDH)与波分复用(Wavelength Division Multiplexing,WDM)光纤技术日渐成熟的背景下,光纤技术逐步取代了过去的载波传输技术,促使社会各领域的通信方式与通信质量发生了转变。因此,着重围绕SDH与WDM光纤技术的应用优势及实际应用效果进行全面阐述。展开更多
In this paper, a Wavelength Division Multiplexing (WDM) network model based on the equivalent networks is described, and wavelength-dependent equivalent arc, equivalent networks, equivalent multicast tree and some oth...In this paper, a Wavelength Division Multiplexing (WDM) network model based on the equivalent networks is described, and wavelength-dependent equivalent arc, equivalent networks, equivalent multicast tree and some other terms are presented. Based on this model and relevant Routing and Wavelength Assign- ment (RWA) strategy, a unicast RWA algorithm and a multicast RWA algorithm are presented. The wave- length-dependent equivalent arc expresses the schedule of local RWA and the equivalent network expresses the whole topology of WDM optical networks, so the two algorithms are of the flexibility in RWA and the optimi- zation of the whole problem. The theoretic analysis and simulation results show the two algorithms are of the stronger capability and the lower complexity than the other existing algorithms for RWA problem, and the complexity of the two algorithms are only related to the scale of the equivalent networks. Finally, we prove the two algorithms’ feasibility and the one-by-one corresponding relation between the equivalent multicast tree and original multicast tree, and point out the superiorities and drawbacks of the two algorithms respectively.展开更多
文摘随着光纤传输介质的出现,通信领域也进入了新的技术革新与发展黄金期。尤其在同步数字传输(Synchronous Digital Hierarchy,SDH)与波分复用(Wavelength Division Multiplexing,WDM)光纤技术日渐成熟的背景下,光纤技术逐步取代了过去的载波传输技术,促使社会各领域的通信方式与通信质量发生了转变。因此,着重围绕SDH与WDM光纤技术的应用优势及实际应用效果进行全面阐述。
基金Supported by the Natrual Science Foundation of Shaanxi (No.2004A02) and Outstanding Scholar Project of P. R. China (2002).
文摘In this paper, a Wavelength Division Multiplexing (WDM) network model based on the equivalent networks is described, and wavelength-dependent equivalent arc, equivalent networks, equivalent multicast tree and some other terms are presented. Based on this model and relevant Routing and Wavelength Assign- ment (RWA) strategy, a unicast RWA algorithm and a multicast RWA algorithm are presented. The wave- length-dependent equivalent arc expresses the schedule of local RWA and the equivalent network expresses the whole topology of WDM optical networks, so the two algorithms are of the flexibility in RWA and the optimi- zation of the whole problem. The theoretic analysis and simulation results show the two algorithms are of the stronger capability and the lower complexity than the other existing algorithms for RWA problem, and the complexity of the two algorithms are only related to the scale of the equivalent networks. Finally, we prove the two algorithms’ feasibility and the one-by-one corresponding relation between the equivalent multicast tree and original multicast tree, and point out the superiorities and drawbacks of the two algorithms respectively.
