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Since the past few years it has been observed that the technology is changing very rapidly. Many of the devices that we are using currently operate wirelessly. Therefore in this paper we have proposed a method to transmit the voice signals wirelessly using Bluetooth. Here we will use microphone or an audio device to input the voice signal to the controller that may be Arduino ATmega 328P. The controller is used to down sample/ up sample the data and finally a wireless device may be Bluetooth or ZIGBEE is used for wireless communication. Index Terms — Bluetooth, ZIGBEE, Arduino, ATmega 328P.

In the rapidly growing Internet of Things (loT) applications from personal electronics to industrial machines and sensors are getting wirelessly connected to the Internet. Many well-known communication technologies such as WiFi, ZigBee, Bluetooth and cellular are used for transfer data in IoT. The choice of corresponding technology or combination of technologies depends on application or other factors such as data requirements, communication range, security and power demands, battery life. In this paper we will focus on ZigBee wireless technology and testing ZigBee end devices in order to see how transmission range impacts on quality parameters.

The wireless technology is one of the core compo-nents of mobile applications with mobility support at low deploy-ment costs. Among these, Wireless Mesh Network (WMN) is one of the technologies that supports mobile users for un-disrupted, reliable data connectivity, provides high bandwidth even in areas, where access of such services is difficult. Additionally, it features capabilities like self-configuring, self-healing, and self-organizing. IEEE proposed a MAC standard for WMN enhancements named IEEE 802.11s for multi-hop networks. Within this standard, the mandatory routing protocol called Hybrid Wireless Mesh Protocol (HWMP) is proposed for efficient utilization of resources to achieve high bandwidth at MAC layer. To improve this protocol, a congestion avoiding protocol was proposed, which utilizes alternate paths just before the congestion state is reached. The proposed technique does not add any overhead, it utilizes congestion notification frame, which is already part of standard. This paper discusses simulation results of the proposed routing protocol against the existing HWMP protocol for packet delivery fraction, throughput and delay. The results indicate that the proposed technique significantly improves performance of IEEE 802.11s.

Sensors and other control devices with embedded processing capabilities require low power communication protocols with data rate in excess of what is achievable through Bluetooth and IR protocols. In this context, two main networking protocols, viz., ZigBee and 6LoWPAN have assumed significance. Both protocols use IEEE 802.15.4 standard for the physical layer. The network layer of 6LoWPAN is based on IPv6. It essentially defines a protocol that provides IP integration with power constrained wireless sensor networks. Therefore, machine to machine communication over the Internet became a reality. In contrast, the main features of ZigBee protocol are to support low duty cycle, low latency, secure point to multipoint data communication. The original ZigBee standards have been enhanced to ZigBee IP in 2013. Similarly, proposals like COAP and RPL have enhanced 6LoWPAN for better energy management. This chapter of the book gives a comprehensive coverage of these protocols.

IPv6 over the TSCH mode of IEEE 802.15.4e (6TiSCH) is the wireless sensor network protocol standard proposed by the Internet Engineering Task Force (IETF) for Internet of Things (IoT). Aside from 6TiSCH, there are other existing protocol standards for wireless sensor networks which are suitable to be deployed in industrial applications. However, there are no comprehensive performance evaluations done on 6TiSCH to date. This paper aims to focus on the formation of networks involving 6TiSCH, and evaluate its performance in terms of end-to-end latency, network throughput, and packet loss through simulative analysis. Open-source software from OpenWSN project developed by UC Berkeley and Wireshark network protocol analyzer were used for the experiment. A network of five motes were simulated using Openvisualizer where each simulation run had different number of channels enabled with a preconfigured Packet Delivery Ratio value for each. The contribution of this project will help in providing insight on the performance of 6TiSCH for further development and optimization of the protocol.

The system of smart home can provide a kind of easier, ordered and effective life style to human, and must be the development tendency for future inhabitancy mode. Therefore, a smart home system solution is proposed in this paper. Firstly, this paper analyzes the characteristics of ZigBee technology, device types, network topologies and ZigBee protocol specification. Secondly, a design scheme of smart home system based on ZigBee technology is put forward and discussed. Then, the hardware design of ZigBee nodes based on CC2530 chip is given in detail. And, embedded programming software in each ZigBee node and user management platform software are implemented respectively using IAR and Microsoft Visual C++ 6.0. Finally, system test results show that the smart home system implemented above can be served as practical application reliably.

Wireless sensor networks represent a key technology enabler for enhanced health care and assisted living systems. Recent standardization efforts to ensure compatibility among sensor network systems have produced the IEEE 802.15.4 standard, which specifies the MAC and physical layer behaviour. Energy and network life time are two critical factors for WSN performance. IEEE 802.15.4 is a standard used for low data rate Wireless Personal Area Networks (WPANs). Medium Access Control layer (MAC) of IEEE 802.15.4 plays an important role in the performance of Wireless Sensor Network (WSN). The unique feature of this MAC layer is the superframe structure, which allows devices to access channels in a Contention Access Period (CAP) or Collision Free Period (CFP) and use beacon based synchronization mechanism. In this paper, we propose a cross-layer framework to prolong the network lifetime, to improve the energy and to lower the latency of WSNs based on the IEEE 802.15.4/ZigBee standards. To cover all the scenarios, we have considered hierarchical topology and peer to peer beacon enabled network. The performance metrics are evaluated using simulation results.

SUMMARY ZigBee is a wireless network technology suitable for applications requiring lower bandwidth, low energy consumption and small packet size. Security has been one of the challenges in ZigBee networks. Public Key Infrastructure (PKI) provides a binding of entities with public keys through a Certifying Authority (CA). Public key cryptography using public–private key pairs can be used for ensuring secure transmission in a network. But large size of public and private keys and memory limitations in ZigBee devices pose a problem for using PKI to secure communication in ZigBee networks. In this paper, we propose a PKI enabled secure communication schema for ZigBee networks. Limited memory and power constraints of end devices restrict them from storing public keys of all other devices in the network. Large keys cannot be communicated due to limited power of the nodes and small transmission packet size. The proposed schema addresses these limitations. We propose two algorithms for sending and receiving the messages. The protocols for intercommunication between the network entities are also presented. Minor changes have been introduced in the capabilities of devices used in the ZigBee networks to suit our proposed scheme. Network adaptations depending on different scenarios are discussed. The approach adopted in this paper is to alter the communication flow so as to necessitate minimum memory and computational requirements at the resource starved end points. In the proposed PKI implementation, end devices store the public keys of only the coordinator which in turn holds public keys of all devices in the network. All communication in our scheme is through the coordinator, which in the event of failure is re-elected through an election mechanism. The performance of the proposed scheme was evaluated using a protocol analyzer in home automation and messenger applications. Results indicate that depending on the type of application, only a marginal increase in latency of 2 to 5 ms is introduced for the added security. Layer wise traffic and packets captured between devices were analyzed. Channel utilization, message length distribution and message types were also evaluated. The proposed protocol's performance was found to be satisfactory on the two tested applications. Copyright © 2014 John Wiley & Sons, Ltd.

MULTI-UTILITY VEHICLE is a vehicle which carries a folding bridge and multiple sensors. This vehicle is mainly used in war-field, it helps the soldiers to cross The un-even areas with the help of the bridge. It also helps other heavy vehicles to cross the disturbed path using its bridge. It is also equipped with multiple sensors like the fire detector, gas detector, light detector. This helps the soldiers to identify the different types of threats bearing poisonous gases, increase in temperature etc. from a longer distance. Those threats can be recognized by the soldiers with the help of buzzers equipped in the detector. As it is a remote vehicle which works on the wireless transmission of ZigBee, the light detector in the vehicle is used to automatically switch on the main lights when the visibility level starts decreasing due to sunlight. This project is already implemented in European countries during the First World War. It is an upcoming technology in our country. For solving the problem of the cooperation between multi-robots, a communication system based on the ZigBee network was designed. In the hardware of the robots, the ZigBee nodes are introduced. The multi-robots form a star network by the ZigBee nodes, and they keep communication with each other by the central node. The ZigBee network has many characteristics such as low cost, low power consume, strong anti-jamming ability and real-time performance etc, it adapts to the application of intelligence. Experiments showed that the communication between the robots is reliable. This scheme is a good way for robots to complete complex task and improve working efficiency.

Wi-Fi networks have enjoyed an unprecedent penetration rate in recent years. However, due to the limited coverage, existing Wi-Fi infrastructure only provides intermittent connectivity for mobile users. Once leaving the current network coverage, Wi-Fi clients must actively discover new Wi-Fi access points (APs), which wastes the precious energy of mobile devices. Although several solutions have been proposed to address this issue, they either require significant modifications to existing network infrastructures or rely on context information that is not available in unknown environments. In this work, we develop a system called ZiFithat utilizes ZigBee radios to identify the existence of Wi-Fi networks through unique interference signatures generated by Wi-Fi beacons. We develop a new digital signal processing algorithm called common multiple folding (CMF) that accurately amplifies periodic beacons in Wi-Fi interference signals. ZiFi also adopts a constant false alarm rate (CFAR) detector that can minimize the false negative (FN) rate of Wi-Fi beacon detection while satisfying the user-specified upper bound on false positive (FP) rate. We have implemented ZiFi on two platforms, a Linux netbook integrating a TelosB mote through the USB interface, and a Nokia N73 smartphone integrating a ZigBee card through the miniSD interface. Our experiments show that, under typical settings, ZiFi can detect Wi-Fi APs with high accuracy (

As a new short-range, low-speed and low-power wireless network technology, ZigBee smart design is ideal for campus wireless sensor networks. Therefore, in order to study how to use zigBee achieve smart campus applications has a very important practical value, on the basis of technology and research Zigbee wireless smart construction on campus and abroad, combined with our practical needs of wireless smart campus, put forward a set of Zigbee-based wireless smart campus solution.

This paper analyzed wireless sensor network simulation technology. We discussed the principles of wireless sensor network simulation based on NS2 and constructed a visual simulation model for wireless sensor networks. By adding NS2 protocol and setting the sensor nodes and some simple parameters, the system presented the running process and the performance of the network in the form of animation and graphics. The results show that this method simplifies the process of simulation of wireless sensor networks, and improves the efficiency of wireless sensor networks research and development, which provides support for the development of application-oriented networking of wireless sensor networks.

Using of wireless sensor networks in extreme and inaccessible environments usually has energy issues of some kind. The IEEE 802.15.4 is designed in general to fulfill this requirement of low data rate ad hoc networks, i.e., a low complex system with ultralow-power consumption. Similar to all IEEE standards, however, IEEE 802.15.4 comes with many flexible variables for optimized local solution such that its beacon-enabled duty cycle mode power management mechanism. Here, we propose a novel adaptive duty cycle algorithm making maximum use of network traffic for automatically adjusting the duty cycle for minimum energy. The system simulation results show superiority of the proposed algorithm for reducing the energy consumption and increasing the throughput for comparative techniques in the literature.

Modern micro sensor has low cost, low power characteristic, it can realize the wireless communication and computing performance, a large number of the sensors organizations constitute the wireless sensor network. This paper realized the design of wireless sensor network positioning system based on CC2430 using Zigbee technology and RSSI ranging technology. Through the experiment test, the technology improved fixed position accuracy and resistance to environment base on RSSI calculate method.

Smart Multiple-Tap to be introduced in this paper, is an electronic device that controls the Multibple-Tap through the Smartphone. It runs on network and has an inbuilt Zigbee communication module. Thus, users can control home devices from remote through home server. Mentioned home server is operated as a gateway and is connected with smart devices on the Internet. To sum up, Users using this Smart Multiple-Tap can check the state information of the multi-tap ON/OFF and can control immediately by smartphone. also, Smart Multiple-Tap perfectly shut down the standby power. when users turn off each of the Smart Multiple-Tap’s circle, It drives automatically lowest electricity-consuming mode and shut down the standby power by its own built-in SSR module. therefore, it will bring the energy saving effect on environment using Smart Multiple-Tap. ※ 본 연구는 미래창조과학부 및 정보통신산업진흥원의 산학협력 특성화 지원 사업의 연구결과로 수행되었음. (NIPA-2014-(H0806-141002)) ※ 본 연구는 2012년도 한밭대학교 교내학술연구비의 지원을 받아 수행되었음. First Author : Graduate School of Inforamation & Communications, Hanbat University, holysing@naver.com, 학생회원 ° Corresponding Author : Graduate School of Inforamation & Communications, Hanbat University, phj@hanbat.ac.kr, 정회원 * 한밭대학교 정보통신전문대학원, {sangmaz, atan925}@naver.com, msseo@hanbat.ac.kr ** 한밭대학교 정보통신전문대학원, maya999@krpost.net, 정회원 논문번호:KICS2014-05-214, Received May 31, 2014; Revised July 8, 2014; Accepted September 24, 2014 논문 / Zigbee 통신 기반 스마트 멀티탭 시스템 구현 931 그림 1. 스마트 멀티탭 시스템의 전체 통신 개요도 Fig. 1. Overview of the entire communication system, a Smart Multiple-Tap I. 서 론 최근 이동전화와 PC, 인터넷이 결합된 스마트폰의 보급으로 삶의 방식이 획기적으로 변화하고 있다. 기 존에 컴퓨터에서만 접속할 수 있었던 인터넷이 장소 에 상관없이 누구나 스마트폰으로 접속할 수 있게 되 었다. 이에 따라 컴퓨터나 스마트폰이 아닌 다른 사물 도 인터넷으로 접속하여 제어할 수 있는 것에 관심이 높아지면서 생활에 밀접한 기기들이 상호간, 혹은 모 바일과 통신을 하면서 새로운 서비스 또는 유용한 가 치를 제공하는 사물인터넷(IoT; Internet of Things)의 시대가 확산되고 있다. [1] 조사기관인 가트너(2010)에 따르면 2020년 인터넷에 접속되는 기기는 2010년 대 비 약 50배가 증가하여 1000억대에 이를 것으로 전망 되고 있다. 사물인터넷은 발전하여 이른바 미래인터넷 으로 성장될 것이며, 국가의 성장 동력원으로써 중요 한 가치를 지니게 될 것이다. [2] 이러한 사물인터넷 시대를 대비하여 다양한 IT기술 들이 연구되고 있는데 대표적인 예가 스마트 홈에 관 한 연구이다. 스마트 홈은 국내 기업인 삼성과 LG가 전략적으로 육성하고 있는 차세대 성장 동력원으로써 스마트 폰과 가전제품들과의 네트워크 통신을 이용해 스마트한 생활을 가능하게 한다. 한 조사에 따르면 스 마트홈 분야에서 가전기기의 원격제어부분에 85%이 상의 사람들이 미래의 홈 네트워크 필요성에 대해서 긍정적인 입장인 것으로 조사되었다. [3] 하지만 기존의 홈 오토메이션 시스템은 일반 가정에서 접할 수 없고, 만약 있다 하더라도 기존의 설치된 시스템을 자신에 맞게 추가하거나 제거하기 어려운 점이 있다. 또한, 값비싼 비용도 문제가 되고 있다. [4] 한편, 2011년 대한민국 대기전력 실측조사를 분석 해보면 가구당 대기전력 소비는 연 평균 209kWh로 나타났으며, 이 수치는 대기전력으로 연간 총 전력소 비(3400kWh)의 6.1%를 소모하는 것으로 나타났다. 이는 사용하지 않는 가전기기가 소모하는 대기전력이 심각하다는 것을 말한다. 본 논문에서 제안하는 스마트 멀티탭 시스템은 스 마트 홈 분야에서 주목받고 있는 ‘스마트 콘센트 시스 템의 기술’을 모토로 하여 저렴한 비용으로 통신 네트 워크를 구축하여 멀티탭을 원격 제어할 수 있는 시스 템이다. 이 시스템의 주안점은 스마트 기기로 시간, 장소에 제약 없이 멀티탭을 제어함으로써 집 안의 전 자기기를 편리하게 제어한다는 것이다. 한편, 대기전력과 소비전력의 낭비가 심한 셋탑박 스와 공부방에 설치된 스위치 허브의 전원을 켜고 끄 는 것은 무척이나 귀찮고 성가신 일이다. 하지만 제안 한 시스템으로 소비전력은 물론, 대기전력 차단으로 전기에너지를 손쉽게 절약할 수 있다. 본 논문의 구조는 다음과 같다. 서론에 이어 2장에 서는 개요로써 스마트 멀티탭 시스템의 전체적인 동 작원리에 대해 설명한다. 3장에서는 스마트 멀티탭의 구성에 대해 자세히 살펴보고, 4장에서는 홈 서버와 Database 서버의 역할과 기능에 대해 기술한다. 5장에 서는 스마트 멀티탭의 대기전력 측정실험에 대해 정 리한 자료를 분석한다. 마지막으로 6장에서는 결론 및 향후 연구 과제에 대해 기술한다.

ZigBee is the emerging industrial standard for Ad-hoc wireless networks based on IEEE 802.15.4, having characteristics such as low data rate, low price, and low power consumption. It is widely used in wireless sensor networks for remote monitoring, Home-appliance networks, and industrial automation. It supports tree and mesh routing. A major concern in wireless sensor networks (WSNs) is energy conservation, since battery-powered sensor nodes are expected to operate for a long time (for months or even years). AODV, an on-demand routing protocol is used for ZigBee mesh networks. The high number of control packets, makes AODV unsuitable for certain applications that requires energy efficient communications. A new routing strategy (sEAODV) is proposed here: combination of i) simplified AODV (sAODV): will try to reduce control overhead and hence energy consumption and ii) Energy Aware Mesh Routing (EAODV): to prevent early death of nodes having low energy (less than 10% of its initial energy level) will not forward RREQ messages hence, they will not be a part of communication. The algorithm performance is simulated using NS-2 simulator. Our proposed scheme shows overall performance improvement compared to original AODV in terms of Energy Consumption, Routing Overhead and Number of packet drops. At the end one idea is proposed to indicate emergency/urgent data (fire alarm or sensory data of a patient in ICU) by a flag bit, which forces even the low energy node to deliver the data to the destination node.

In this paper we design a wireless sensor network of Zigbee technology, which consists of sensor nodes, sink nodes and monitoring software design. Through laboratory test, the design of the system is stable and reliable. Although the system can meet the requirements of Zigbee wireless communication hardware, but part of system hardware is relatively simple. If it is applied to the more complex place, we must add the corresponding module in the hardware and software. Adding node function module and the monitoring function in the Zigbee wireless network, it will meet the actual needs.

The explosion in the number of 802.11 and 802.15.4 deployments is exacerbating the coexistence problem, which has been reported in the literature to cause significant performance degradation in co-located networks employing the two different wireless standards. The wireless coexistence problem has, thus far, been studied primarily using hardware, due to the lack of analytical results and good wireless coexistence simulators. This paper presents the first analytical model for coexisting 802.11 and 802.15.4 networks. We derive analytically, using Markov chains, the normalized saturation throughput under coexistence. Additionally, we propose a performance tuning method that ensures QoS and a distributed Nash-equilibrium-based method that ensures fairness. We validate our model and the tuning methods using a coexistence simulator previously developed and presented by the authors. We demonstrate that our model has a low average error smaller than 10%.

With the development of information technology, research and application of wireless sensor-actuator network is more and more widely. In this paper, the composition of wireless sensor-actuator network is described, the ZigBee protocol which is a wireless networking protocol is analyzed from multiple aspects in the network. Network architecture, protocol stack hierarchy, building network process, data transfer process, task approach based on ZigBee protocol are studied.

Wireless mesh network (WMN) is an up-to-date network emerging with the development of wireless communication technology. Nowadays, it has become more and more popular. Along with this development, its performance has been research focus. However, the problem is that there are less than a handful of tools available to provide IEEE 802.11s mesh nodes or mesh models, which hampers its progressive research. In this paper, we propose a generic model for modeling and simulating IEEE 802.11s in OPNET. A prototype is implemented. According to the analysis of the simulation results, the proposed simulation platform satisfies the workflow of IEEE 802.11s and implements basic functions of IEEE 802.11s, and hence is shown to be an effective tool to develop IEEE 802.11s.

The major design challenge of home automation is to choose best standard for controlling devices in existing home environments without any changes in infrastructure. In previous years Zigbee was the promising technology for home automation. But now a day‘s Enocean is the new standard which competes with Zigbee. The temperature of the house is hard and complex to understand since a lot of factors has to be considered. Furthermore, the quality of the house including temperature control not only affects the house performance it also affects the human comfort in their house. In this paper temperature of the house is controlled by using Zigbee and Enocean because of their some features like low cost, low power usage and mesh networking. The work presented here is to show how we can implement Zigbee and Enocean model by using Matlab/Simulink. Some parameters of these technologies are also compared such as: delay, energy per packet and received signal strength indicator (RSSI).

For large-scale structural damage in various forms, a single regional monitoring is difficult to finish. The paper introduces a design method of a large-scale structural health monitoring system based on wireless sensor networks. ZigBee wireless communication technology is used for the system. The ZigBee-based double wireless sensor network architecture is designed. The wireless sensor node, sink node, a gateway node of this system is designed by using the CC2530 chip as core of data processing and wireless transceiver. In the IAR development platform, the lower position machine software is designed by using C language and the LabVIEW is used to finish the remote display in the host computer. The results show that the monitoring system meets the design requirements, has the advantage of good on-line and real-time monitoring etc.

Firstly, the Zigbee wireless technology, uCOSII real-time operating systems, gateways and other techniques were studied, and then Cortex-M3 core processor, equipped with running uCOSII operating system to set up an internal wireless network Zigbee module to achieve the end nodes of data acquisition and node control, and ultimately design and implement a remote temperature control and infrared remote control, users can realize temperature control and remote air conditioning temperature regulating heater remotely via a PC or a mobile terminal. The system is real-time, high stability, can be applied to the field of industrial control and remote areas such as intelligent home.

As a wireless communication technology, Zigbee has been used in the mobile robot’s location in recent years. An experimental system composed by a Zigbee network, a PC and a robot is designed to study the location accuracy of Zigbee location technology. The hardware and software platform are constructed. The influence of the layout and the number of reference nodes on the location accuracy is discussed. The results show that ZigBee-based robot position method can meet the requirements of mobile robot applications. The location accuracy in the layout of triangle is up to 0.636m (in the range of 4m4m) and is better than those in the layouts of rectangle and cycle .

In order to monitor a wide distribution, quantity, long working hours for industrial electric equipment, this paper provides a solution based on Zigbee wireless sensor networks. The core CC2530 chip is the control center of the entire system, and holzer sensor is selection as a current sensor. Through the wireless network which is composed of terminal nodes, routing nodes and coordinator, the collected data is sent to PC terminal and displayed. The experimental results show that the wireless sensor network can effectively and reliably collect current harmonics of electric equipment and transfer to the PC terminal in time.

A fully integrated low-power high-coexistence 2.4-GHz ZigBee transceiver implemented in 90-nm CMOS technology is demonstrated. The two-point direct-modulation with a fractional- N synthesizer is adopted in the transmitter architecture. The transmitter can provide high output power of +9 dBm and excellent error vector magnitude of 5.1%. The direct conversion is used in receiver for simplicity and -97-dBm minimum receiver sensitivity is achieved. Current consumptions for a TX at +9-dBm output power and for an RX are 28.4 and 15.4 mA, respectively. Excellent coexistence is presented through wireless local area network interferer rejection performance.

In this paper, a home wireless network platform based on Zigbee technology. This article analyzes the Zigbee network protocol, discusses the key issues to build a home wireless network using the Zigbee technology. The network topology, network routing algorithms and network sampling strategies and other issues were discussed and proposed solutions by building a home wireless network monitoring experiments on the pulse signal. The results showed that based on Zigbee technology to build a home wireless network is feasible, the wireless network in the home monitoring has broad application prospects.

ZigBee technology is a small disadvantage of network coverage, this article will introduce GPRS wide-area wireless communication technology ZigBee network, ZigBee network to build a remote data collection and management system, and use intuitive embedded Web server to improve management efficiency. System test results prove that the system has good validity and reliability.

As the key technologies such as wireless communication, sensor continues to mature, wireless sensor networks has become a domestic and foreign focus of research in the field of wireless networks. The main work of the thesis is to implement ZigBee wireless sensor networking, using open source protocol FreakZ On the base of existing hardware. WSN hardware node consists of 32-bit microprocessor STM32F102CB based on ARM Cortex-M3 kernel and AT86RF212 radio transceiver; the software platform uses a lightweight multi-tasking operating system Contiki and open source protocol stack called FreakZ following ZigBee protocol specification, for networking wireless networks nodes. The paper presents the system architecture of WSN networking and its hardware components, software architecture and data transmission and reception processes of the networks. Using FreakZ protocol stack under the Contiki operating system on the base of the existing hardware platform, the network nodes information and topology displayed on the HyperTerminal indicates the success of WSN networking by using FreakZ protocol.

In order to solve the inconvenience of line arrangement under bad environment and the maintenance difficulty, a design method of a wireless temperature monitoring system based on ZIGBEE is given. The system uses RemoDAQ-8000 as temperature sensor and control platform, ZIGBEE wireless communication for wireless communication network. Through five groups based on ZIGBEE. The temperature control experiment, obtained the first-hand information, so as to realize the wireless monitoring; at the same time, the system can be in the local area network, using C/S and B/S two ways to control and query. Experiments show that using wire communication, ZIGBEE wireless communication instead of the traditional, can have an important effect in the field of process control

The prevention and detection of fire have been hotly researched in worldwide. In this paper, an elaborate method of wireless sensor network for building fire safety is proposed. ZigBee technology is adopted in the wireless sensor system to help saving the energy cost and reducing energy consumption. In the routing selection, we choose MESH topology in wireless sensor networks in order to enlarge the monitoring scope. Each end module consists of a microcontroller on Arduino Due board and an Xbee Pro S2 wireless communication module based on the Zigbee standards. Sensors are used for detection which makes it possible to detect fire before inflammation.

In industry and agriculture production process, it often needs to environment temperature and humidity detection. The traditional way is the detected data via wired mode of transmission, as a result of industrial and agricultural production process in the presence of wiring complex, difficult maintenance, flexible deployment of sensor nodes is not the problem such as the wired data transmission system. The system uses ZigBee technology to build a wireless sensor network, collecting temperature and humidity of the environment information, which will receive the data sent to the monitor display and processing.

The knowledge of error nature in wireless channels is an essential constituent of efficient communication protocol design. To this end, this paper is the first comprehensive bit- and symbol-level analysis of IEEE 802.15.4 transmission errors in industrial environments. The intention with this paper is to extract the error properties relevant for future improvements of wireless communication reliability and coexistence of radio systems in these harsh conditions. An extensive set of bit-error traces was collected in a variety of scenarios and industrial environments, showing that error behavior is highly dependent on the cause of packet corruption. It is shown that errors inflicted by multipath fading and attenuation exhibit different properties than those imposed by IEEE 802.11 interference. The statistical behavior of these two patterns is concurrently investigated in terms of differences in bit-error distribution, error burst length, channel memory length, and the scale of packet corruption. With these conclusions at hand, abiding to the computational constraints of embedded sensors and the statistical properties of bit-errors, a Reed-Solomon $(15,k)$ block code is chosen to investigate the implications of bit-error nature on practical aspects of channel coding and interleaving. This paper is concluded by a number of findings of high practical relevance, concerning the optimal type, depth, and meaningfulness of interleaving.

As heavy investment in the smart grid in China, the research and application of new technology has obtained rapid development. To meet the requirements of reliability, stability, robust and low energy consumption in smart grid, ZigBee plays an important role with its own inherent advantages and reasonable design. In this paper, we focus on the route algorithms of ZigBee, introduce the principles and evaluate the performances of them. The simulation results provide feasible effective evidence and feasible solution for further development for smart grid by using ZigBee technology.

The internet is widely used in daily life, of course, also be applied in agriculture. This paper is focus on the technology of ZigBee and serial communication. The ZigBee communication module transfers the data from greenhouse to the monitoring system. Growers can get the data timely, and according to the received data to control greenhouse environment. The monitor computer program is based on VB.NET. ZigBee module gets the data from sensor, through serial ports the information is transferred to the monitor computer. The monitoring software stores the data and displays it on the user interface. If the data beyond the threshold value, the system will give an alarm sounds.

Wireless Sensor Network (WSN), is in the rapid development and widely applied to many fields in recent years due to its low cost, low power consumption and so on. This thesis focuses on the design method of low power consumption and small size WSN node based on ZIGBEE protocol. The main research work and achievements of the thesis are as follows: Firstly, WSN ZIGBEE protocol is researched in detail. The architecture and each layer's function of ZIGBEE protocol are analyzed, and a node design method based on ZIGBEE protocol is proposed. Secondly, design methods of WSN node are discussed. CC2420 RF chip and ATmega128L microprocessor are chosen as the main chips, and their features and performance are described in detail. Furthermore, design methods of each module circuit are introduced.

To solve the problems of the environmental factor detection and data management in the methane fermentation, this paper proposes a design based on ZigBee and PDA technology. Sensor node with CC2530 as the core can implement detection of oxidation-reduction potential, PH value, temperature, and liquid level. Coordinator node adopts ARM11 and is designed to be a PDA form, which is flexible and easy to use. On the basis of the analysis in ZStack protocol stack, the sensor signal acquisition program is accomplished. Customize wince6.0 embedded operating systems, and transplant an embedded SQlite database for powerful data management features. By using serial communication and multi-thread communication strategies, the Zigbee network data acquisition, acquisition cycle settings, power mode settings, and time synchronous adjustment can be accomplished. As the result of the test, the average packet loss rate of the network transmission is 0.375%. The data comparison charts of sensor nodes with standard instrument detected in continuous 24h are essentially coincident, and it indicates that the sensor circuit has been designed properly, and ZigBee network data transmission is stability, so it can meet the actual requirements of applications. Meanwhile, the system is easy to extend for different scale methane engineering application.

The wire transmissions are commonly used in traditional industrial transmitters, but it has the problems like wiring complexity and inconvenience of installation. The design of zigbee wireless transmitter based on C8051F350 is proposed in this paper, which introduced hardware and software, meanwhile, plenty of experiments have been put forward to test it. The result of these experiments shows that it has the features of low power consumption, flexible networking and scalability. This design solves the problem of field wiring, and it has the advantages of lower cost, easy field-installation and operability.

Redundancy technology is an important measure to enhance the reliability of computer control system. Two types of node redundancy architectures of wireless sensor network are analyzed. The design and implementing method of node redundancy in Zigbee network is presented. The node, which acts as master, is determined through competition after the system is powered up. The logical structure of the system is presented too. The switch protocol between master computer and backup computer and the method of competing for master among all the nodes are described in detail. The system can achieve that backup computer switches to master computer without disturbance. Because Zigbee network is adopted to achieve switching between Master and Backup, the reliability of the whole system is enhanced. The novel redundancy system is of low-cost, openness and good maintainability.

WSN (Wireless sensor network) using ZigBee has aroused people’s high interest, ZigBee is considered to be a general solution in many fields such as intelligent household, industrial application, security monitoring and medical application. But wireless sensor network can only provide service within a certain range, in order to overcome this limitation and provide remote application capacity, this paper proposes a technological solutions for the interconnection of ZigBee network and the Ethernet, develops a ZigBee gateway based on ARM platform. Based on the analysis of the ZigBee protocol stack and TCP/IP protocol stack, the protocol conversion mechanism of ZigBee and TCP/IP is presented. Through transplantation LwIP protocol stack, this paper achieves the goal of connecting gateway to Internet, and finally realizes the conversion from ZigBee network to TCP/IP network.

In this paper, the method for NXP's JN5168 wireless microcontroller chip to create a wireless lighting network is first introduced. Meanwhile, this paper will show the JenNet-IP technology features, wireless networking and network flow. After that, this article will discuss the design of wireless communication nodes using JN5168, as well as the wireless communication network focused on LED lighting control. The advantages of JenNet-IP technology against ZigBee will also be represented in this paper.

This paper has designed a smart-home environment monitoring system. The System is based on ZigBee technology establishing wireless sensor network , using the SCM of CC2530 RF as the solutions to the system of the ZigBee technology, achieving parameter detection of multi-environment, and controlling the receive and dispatch of signals . Meanwhile, the system uses LD3320 voice chip, take the use of (non-specific) voice recognition technology to accept and control signal, realizing voice control for home appliances. And the distribution of the system is flexible and can change any monitoring points and monitor objects. It has good scalability and stability and can be used in various occasions for environmental monitoring.

ZigBee is the new standard that has been developed for low cost, low data rate and low power consumption wireless network,The routing algorithm is the key of the research and development work. This paper introduces the ZigBee protocol model of specification, And focuses on the ZigBee protocol network layer routing algorithm, Analyzes the advantages and disadvantages of tree routing and AODVjr routing algorithm.

This paper relates to the study about the street security light management system. The purpose of the wireless remote management system is to manage street security lights efficiently. The system is composed of three components like light controller, CDMA gateway and web based remote management server. The zig-bee solution is adopted to make local wireless network between street security lights. The CDMA network is used for the wireless communication between street security light controller and the remote control center. The gateway to interconnect zigbee network and CDMA was designed with low power 32 bits Cortex M3 mi-cro-controller. For the data communication between the management server and the gateway, SMS and socket based TCP streaming is used. The management server sends SMS to the gateway to deliver light control and management requests, and the gateway replies with the light controllers report via TCP streaming. By using both SMS and TCP streaming communication, it was verified that simple cost effective management is possible for street security lights. We tried real test for 95 street security lights in real environment during two months and ana-lyzed the practical possibility for mass supply.

Internet of Things (IoT) refers to uniquely identifiable objects and their virtual representations of an Internet like structures. The main goal of the IoT is to make the sense the information of the computing device without the need of human interaction. Zigbee Wireless sensor node is a communication protocol which is used to transmit data over long distances by passing data through the intermediate devices to cover longer distant and provides secure networking. It can be used anywhere at any time. It requires less power to operate and it can be implemented easily with any type of wireless generation. 4G (Fourth Generation) is the next generation of wireless networks and it can provide fast and secure data transfer. Speed of 4G can be achieved by OFDM modulation and it will utilize most of the existing wireless communication infrastructure. World Wide Interoperability for Microwave Access (WiMAX) is wireless technology and it provides wireless data over long distance. WiMAX provides a media access control (MAC) and proposes the full range of security features to secured data exchange. It transmits the data at 70 Mbps. In this paper, Zigbee Wireless sensor nodes real time data transmission integrated with 4G Technology for long distance Secure Communication with high mobility is proposed and analyzed using OPNET. The performance such as delay, data sent, Jitter and end-to-end delay and packet delay variation are simulated.

This work is based on the characteristics of IEEE 802.15.4 protocol stack. A hybrid topology has been design by using three possible combinations of Zigbee network topologies considered in different scenarios to verify the consistency of this communication network. The scenario has been design under the consideration of device failure in hybrid topologies. There are various parameters like throughput, delay, network load and number hops are measured during these scenarios. The result concludes that Star-Tree hybrid topology is better to make an effective network in case of device malfunctioning. The simulation has been done using OPNET Modeler 14.5. Simulation results enumerate the affect of Zigbee network hybrid topologies on the basis of performance factors.