Wavelength decomposition approach has been proposed to compute blocking probability （BP） of fixed routing in wavelength-routed optical networks （WRONs） without wavelength conversions. By means of wavelength decomp...Wavelength decomposition approach has been proposed to compute blocking probability （BP） of fixed routing in wavelength-routed optical networks （WRONs） without wavelength conversions. By means of wavelength decomposition, a WRON can be regarded as a set of different layers （colors）, in which blocked traffic in one layer is overflowed to another layer. A novel iterative scheme is put forward in case of t3P matching used to characterize the overflow traffic from one layer to another in this paper. Furthermore, the analysis of BP based on the improved wavelength decomposition approach is derived and results show that it yields higher calculation accuracy.展开更多
Wavelength converters are used in optical networks to overcome transparent wavelength channel insufficiency. However, current GMPLS control plane does not distribute wavelength con- verter information to network nodes...Wavelength converters are used in optical networks to overcome transparent wavelength channel insufficiency. However, current GMPLS control plane does not distribute wavelength con- verter information to network nodes. To overcome this situation, four wavelength converter information sharing methods for GMPLS-controUed optical networks are proposed. The first two, Conversion Capability during Signaling （CCS） and Conversion Availability during Signaling （CAS）, are based on the RSVP-TE signaling protocol, while the others, Conversion Capability Advertisement （CCA） and Conversion Availability Advertisement （ CAA ） , are based on the OSPF-TE routing protocol. Simulations show that CAA obtains the lowest blocking, while CCS the highest. Moreover, CAA only slightly increases the control plane load compared to CAS.展开更多
基金supported by the National Basic Research Program of China (2010CB328204)the Hi-Tech Research and Development Program of China (2008AA01A328,2009AA01Z255)+3 种基金the National Natural Science Foundation of China (60932004)RFDP Project (20090005110013)111 Project (B07005) of Chinathe Fundamental Research Funds for the Central Universities
文摘Wavelength decomposition approach has been proposed to compute blocking probability （BP） of fixed routing in wavelength-routed optical networks （WRONs） without wavelength conversions. By means of wavelength decomposition, a WRON can be regarded as a set of different layers （colors）, in which blocked traffic in one layer is overflowed to another layer. A novel iterative scheme is put forward in case of t3P matching used to characterize the overflow traffic from one layer to another in this paper. Furthermore, the analysis of BP based on the improved wavelength decomposition approach is derived and results show that it yields higher calculation accuracy.
文摘Wavelength converters are used in optical networks to overcome transparent wavelength channel insufficiency. However, current GMPLS control plane does not distribute wavelength con- verter information to network nodes. To overcome this situation, four wavelength converter information sharing methods for GMPLS-controUed optical networks are proposed. The first two, Conversion Capability during Signaling （CCS） and Conversion Availability during Signaling （CAS）, are based on the RSVP-TE signaling protocol, while the others, Conversion Capability Advertisement （CCA） and Conversion Availability Advertisement （ CAA ） , are based on the OSPF-TE routing protocol. Simulations show that CAA obtains the lowest blocking, while CCS the highest. Moreover, CAA only slightly increases the control plane load compared to CAS.
