Status ASON equipment and technology-ASON, optical network, optical communications – Communications

Article by jekky

Been in recent years and the International Organization for Standardization optical network equipment manufacturers to dedicate and actively promote ASON in product research and development have made significant progress and began to enter the practical stage Currently many manufacturers have products with the commercialization of ASON Equipment at all levels of maturity have made great progress First transmission level the relatively mature SDH based ASON products ASON equipment The feature is to provide high capacity cross matrix multi direction of traffic grooming optical port present most manufacturers can support cross 320G and 640G capacity even up to 1 28T processed particles VC 4 nC V Provide a rich service interfaces including STM 1 STM 4 STM 16 STM64 and GE interfaces Some manufacturers are developing cross OTN and OTN interfaces of ODU and has made great progress The second is to control the level the basic function of the control level already has ASON support a new generation of distributed control systems including distributed signaling routing and automatic discovery It can achieve the soft permanent connection SPC and exchange connectivity SC to create query delete support the publication and updating routing information channel routing computing support functions such as automatic discovery of neighbors The interface level in the control area UNI interface functions support is fairly good but its market application mode is not clear the lack of actual applications System on the E NNI interfaces have begun to support at home and abroad have conducted interoperability testing operation can achieve cross domain connection but the inter domain routing protection and restoration areas to be further standardized Third the management plane the transmission resources for the management of mature part of the control plane resources management is not perfect As the ITU T standard for ASON management plane is still perfecting the process the current ASON equipment lags behind the development of network management system equipment development Fourth the protection of recovery the current protection mechanisms are more mature but there is a big difference in recovery mechanism the international standard is no standard for the protection and restoration methods ASON network node devices are more mature and complete support of SDH network protection features such as two fiber multiplex section shared protection ring SNCP and the 1 1 1 1 MSP are to meet the protection switching time of less than 50ms standards Based control plane protection support 1 1 protection switching time is less than 50ms can ensure that important signaling network and voice services Distributed control plane based on the dynamic re routing restoration of function ability to achieve resistance to multiple failures recovery time to the second level in a few hundred milliseconds in which higher levels of commercial manufacturers of dynamic recovery and improve the degree of stability higher Combination of protection and restoration The majority of manufacturers to support the traditional SDH protection methods with the A SON combination of dynamic recovery and control plane based protection and dynamic restoration of the combination of multiple faults can be realized against the viability and enhance network robustness ASON network offers a variety of Service Level SLA SLA levels may correspond with a variety of protection and restoration methods to provide customers with differentiated services Five terms in the signaling communications network ASON support the band and two band signaling communication Some manufacturers support the in band signaling channel expansion Overall the current transmission plane ASON equipment is relatively mature but the ASON control plane functions of equipment and performance differences The interface side INNI features more mature UNI enabled applications still do not sound business models and applications E NNI function is still in its infancy ASON intelligent management needed further work In the protection and restoration the various network equipment vendors in the ASON control plane based protection and recovery of the implementation mechanism to protect the recovery time and mature sound with a greater difference

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