# LSSDNF: A Lightweight Secure Software Defined Network Framework for Future Internet in 5G-6G
## 2 Related Work  
Computer networks are currently getting faster, smarter, resource-rich, and more complex as a result of rapid progress. For instance, the Internet of Things (IoT) has been steadily embraced by many businesses and networks. According to a Gartner forecast, there are more than 20 billion linked devices worldwide as of 2020. As the control and data plane are traditionally integrated inside the network devices, the IoT architecture frequently contains a large number of devices, servers, and middleboxes, making network management and configuration much more challenging and error-prone. It is also very laborious to add new devices and modify services. Deploying new services without disrupting existing ones is typically a challenging task. As a network becomes bigger, this problem can get worse. A viable solution to this problem is Software-Defined Networking (SDN), which separates the network control plane from the data plane. In such a network, IT managerscan adjust network regulations from a controller that is software-based without having to modify settings in each switch. That is to say, regardless of the precise connections between a server and devices, the centralized SDN controller can instruct the switches to supply network services under the needs. This centralized management helps ease network administration and lighten configuration work. In reality, SDN still faces numerous security risks. For example, the SDN controller itself could fail in an adversarial environment, and distributed controllers may also experience reliability and reputation problems. On the other hand, blockchain technology has drawn a lot of interest from academics and industry due to the massive success of the Bitcoin cryptocurrency. A blockchain maintains a record of all data transfers, where the record is also referred to as a \"ledger\" and the transfer of data as a \"transaction\". Each new transaction, which can only be added to the blockchain after successful verification, can be verified via a peer-to-peer network. In this situation, it is thought that blockchain would make it possible for unrelated parties to exchange data or information without requiring a reliable intermediary. [PERSON] et al. (2018) [2] suggested a novel approach for conforming the 5G architecture of the Third Generation Partnership Project (3 GPP) to the principles of Software Defined Networking (SDN). The gNB base station is transformed into a pure data plane node as a result of moving the control functionality from the 5G Radio Access Network (RAN) to the network core. As a result, the cost of signaling between the RAN and the core network is significantly reduced. Additionally, the performance of the system is enhanced. The common SDN-5G/6G application scenarios and important concerns are covered by [PERSON] et al. (2019) [3]. This work also concentrated on mobile network mobility management strategies. Additionally, three types of software-defined 5G/6G mobility management mechanisms are discussed and contrasted. [PERSON] et al. (2020) in [4] analyze the dual-channel architecture specified by the software of wireless sensor in 6G/IoE and proposes a reasonable solution to reduce the signal interference so that the related signals can be transmitted more effectively. This is necessary in order to broadly apply 6G/IoE (Internet of Everything) to various scenarios in real life and connect the infrastructure closely related to people through the network. [PERSON] et al. (2021) in [5] primarily focused on 5G by highlighting the fundamental design principles associated with such technology, such as the infrastructure architecture of 5G, the deployment potential of 5G, the technology employed in 5G, and the services and applications that 5G is capable of offering. [PERSON] et al. (2022) [6] presented that the next-generation 6G network should be data-driven and sensor-based to enable huge connections and distributed intelligence.