[논문]WiFi-Based Home IoT Communication System

Chen, Wenhui; Jeong, Sangho; Jung, Hoekyung

doi:10.6109/jicce.2020.18.1.8

WiFi-Based Home IoT Communication System 원문보기

Journal of information and communication convergence engineering, v.18 no.1, 2020년, pp.8 - 15

Chen, Wenhui (Computer School, University of South China) , Jeong, Sangho (Department of Computer Engineering, Pai Chai, University) , Jung, Hoekyung (Department of Computer Engineering, Pai Chai, University)

Abstract ▼ AI-Helper

Internet-of-Things (IoT) technologies are used everywhere, and communication is one of its core and essential aspect. To solve the networking and communication of small IoT terminals, in this paper, a communication scheme based on low-cost WiFi is proposed, which also has the advantages of good compatibility and low power consumption. At the same time, it has a convenient one-key configuration mode, which reduces the technical requirements for operators. In this study, a communication protocol is designed that mainly aims at up to dozens of domestic IoT terminals, in which the amount of data is not large, data exchange is not high, and network is unstable. According to the alarm data, update data, and equipment or network fault, the protocol can respectively transmit in real time, regularly and repeatedly. This protocol is open and easy to integrate, and after cooperating with tiny encryption algorithm, information can be safely transmitted.

주제어

표/그림 (11)

표 Table 1. Comparison of common communication chips used in IoT
표 Table 2. 802.2 SNAP format packets
표 Table 3. Package format of protocol
표 Table 4. Description of function code
그림 Fig. 1. Flow chart of encryption.
표 Table 5. Variable ID classification
표 Table 6. Variable ID
그림 Fig. 2. Flow chart of IoT terminal communication program.
그림 Fig. 3. Flow chart of IoT server communication program.
그림 Fig. 4. Encryption and decryption tests.
그림 Fig. 5. Packet size comparison.

AI 본문요약
AI-Helper

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가설 설정

For example, when reading the values of two discontinuous addresses, the protocol needs to communicate twice. In this study, a communication protocol was designed to be more compatible with all types of MUC, and for domestic IoT, both the openness of the protocol and the security of the data transmission are considered.

제안 방법

The communication protocol designed in this system is more compact during transmission. Comparing this protocol with the modbusTCP protocol, which is used herein as a representative of a traditional protocol, without considering the encryption, IP, TCP, or UDP header, the packet sizes of the continuous and discontinuous variables are calculated when transmitting 1-8 WORD variable values. When a continuous variable transmission is conducted, the packet sizes of the proposed and traditional protocols are almost the same, as indicated in Fig.
DM5 is used to hash out different keys for each terminal, and the TEA is then used to encrypt the transmission data. In this study, Keil is used to test the encryption of the TEA, and the operation efficiency is also extremely high on a micro-51 single-chip microcomputer, and can thus be compatible with all types of single-chip microcomputers.
In this study, a home IOT communication system that takes compatibility, cost, and security into consideration was designed.

대상 데이터

To test the compatibility and running speed of the encryption using the TEA, Keil was used for the simulation test. A 51 MCU with a main frequency of 22 m was used. The plaintext input of the encryption was “0x303132334353637,” and the key was “0x61626364656667686970717273747576.

참고문헌 (11)

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