Primary Synchronization Signal (PSS) timing synchronization is the key step of cell search in power wireless private network system. Aiming at the problem of high computational complexity of traditional algorithm, an improved PSS timing synchronization algorithm is proposed in this paper. The algorithm utilizes the central symmetric property of PSS to reduce cross-correlation complexity, uses a dynamic threshold value to determine the success of the coarse synchronization detection, then the accurate timing synchronization point, and the cell group number are obtained by the secondary fine synchronization. Simulation results show that the improved algorithm achieves higher detection accuracy than the traditional algorithm under low Signal-to-Noise Ratio (SNR), what’s more, its complexity is only about 48% of the traditional algorithm.
KEYWORDS: Network architectures, Telecommunications, Network security, Data transmission, Computer security, Data communications, Mathematical optimization, Local area networks, Industry, Connectors
In view of the high demand for power communication network in the new power system services, this paper designs a power communication scheme based on the fusion of 5G network and SD-WAN. Firstly, the advantages of 5G network architecture and SD-WAN network architecture are analyzed respectively. Then, combined with the adaptability of new services, the above two technologies are deeply integrated to achieve point-to-point communication of power business terminals. At the same time, in order to ensure the power data transmission security, the network channel adopts the optimized SM4 algorithm, which meets national security requirements. Finally, the feasibility of the proposed scheme is verified by setting up a real network environment. The results show that the scheme proposed in this paper provides a strong support for the new power system communication network.
In the Internet of Things (IoT) environment, embedded IoT devices have limited computing and storage resources. Their data lacks encryption protection. To solve this problem, this paper proposes a lightweight encryption algorithm based on SM4. First, this paper analyzed the encryption and decryption principle of SM4 algorithm. Then the S-box used in the encryption and decryption process was extended from high-order domain to low-order domain. The S-box component is constructed by a few logic gates to realize the lightness of the algorithm. Finally, the optimized SM4 module was embedded in the 5G communication terminal for testing. The results show that the lightweight encryption algorithm for IoT device can adapt to the data encryption of resource-constrained devices well. It is helpful to avoid the data leakage.
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