Research and Implementation of a Network Based on SDN and Multi Area OSPF Protocol

Design of cloud-based conversion of MODBUS RTU to IEC61850

“…That how to realize ACSI is not specified for the purpose of adjusting to the ever-changing society, but SCSM is ought to elaborate the corresponding message and code which is mainly created to project the way of mapping ACSI to the underlay [8]. There is no need to modify the entire protocol as long as we build mapping channels according to the needs of the underlying network and then modify corresponding SCSM, so that the contradiction between communication diversity and protocol consistency will be eliminated [4].…”

“…In 2014, MODBUS protocol was modeled in an object-oriented way in [3] [16], establishing the mapping relationship with IEC61850 model and MMS communication service [15]. In 2018, some studies realized the transformation of MODBUS protocol to IEC61850 based on proxy server mechanism, thus solving the consistency of information transmission [4]. These methods are mostly focused on specific automation cases and lack openness and flexibility.…”

Open Shortest Path First extension for the support of multiarea networks with arbitrary topologies

“…Following Kleinrock and Kamon [10] several works researched the problem of structuring packet-switched networks into multiple areas, both in the context of wired [11][12][13][14][15][16] and wireless networks [17,18]; the works [14][15][16] specifically address the case of OSPF. The research addressed concerns related to the storage and updating of routing information when networks become large.…”

“…This is a critical issue in the case of LSR protocols since routers need to store, and keep updated, a database containing the complete map of the network topology. The key aspects under analysis are the proposal of specific protocols for hierarchical routing [10–13, 15, 17, 18], and the determination of the optimal threshold for splitting a network into areas and of the optimal area size [10, 14, 16]. However, the work in this field has mainly concentrated on hierarchical structures, such as the one currently allowed by OSPF and IS‐IS, which are a constraint over the many possible multiarea topologies.…”