نتایج جستجو برای: پروتکل zigbee

تعداد نتایج: 6065  

2008
Ling-Jyh Chen Li-Ping Tung Tony Sun Nia-Chiang Liang

Based on the IEEE 802.15.4 LR-WPAN standard, the ZigBee standard has been proposed to interconnect simple, low rate, and battery powered wireless devices. The deployment of ZigBee networks is expected to facilitate numerous applications, such as home-appliance networks, home healthcare, medical monitoring, consumer electronics, and environmental sensors. An effective routing scheme in a ZigBee ...

2015
Nazrul Islam

The Wireless Sensor Network (WSN) is spatially distributed autonomous sensor to sense special task. WSN like ZigBee network forms simple interconnecting, low power, and low processing capability wireless devices. The ZigBee devices facilitate numerous applications such as pervasive computing, security monitoring and control. ZigBee end devices collect sensing data and send them to ZigBee Coordi...

2010
Yuan-Yao Shih Yu-Kai Huang Ai-Chun Pang Pangfeng Liu Wei-Ni Chu

ZigBee has been considered as one of the promising communication protocols for low-rate wireless personal area networks. Among the well-known ZigBee topologies, ZigBee cluster-tree is especially suitable for wireless sensor applications with its supporting of power-saving operation and light-weight routing. Due to the restriction of configuration parameters, some devices could be prohibited to ...

2015
Jitesh Saini Sheetal Malik Sudhir Malik

ZigBee technology was developed for special wireless networks where Bluetooth & wi-fi technologies are not showing better results. In wireless personal area networks (PAN) where we need to transmit low data rate information in comparatively large area (10-100 m). We can use Zigbee transceiver system instead of other technologies. As the functionality of Simplicity and Zigbee Technology is simil...

2005
ANDREAS ANDERSSON MATTIAS THORÉN Mattias Thorén

Teleca Systems AB has received several requests to develop wireless applications in areas where there are no suitable standardized solutions. They wish to examine if ZigBee, a new wireless industrial standard can be the answer to the demand for such networks. ZigBee is interesting since it is the first attempt to standardize low power, low data rate networks. The main objective of this Master’s...

2013
Yash Vardhan Varshney Anil Kumar Sharma

OQPSK modulation technique is used for designing Zigbee transceiver worldwide since several years of invention of ZigBee technology. It provides good battery life, better range and various other advantages for which Zigbee technology is known. But here we are discussing about the transceiver performance over the noisy channel. In noisy channel, we are proposing MSK based Zigbee technology and c...

2011
Hung-Cheng CHEN Long-Yi CHANG

ZigBee is a new global standard for wireless communications with the characteristics of low-cost, low power consumption, and low data rate. It has a good market in wireless meter reading. The design and implementation of a ZigBee-based wireless automatic meter reading system are proposed in this paper. The experimental results show that the design can meet the basic needs of automatic meter rea...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده برق و الکترونیک 1393

در این پایان نامه یک تقویت کننده قدرت با بازده 50 درصد و توان خروجی dbm 11.5 که در فرکانس 2.45ghz، با پروتکل zigbee ، و برای کاربرد در wsn می باشد طراحی شده است. در ادامه آن به منظور کنترل توان خروجی که از نیازهای اساسی برای کاهش توان تقویت کنننده های سوئیچینگ می باشد روش جدیدی ارائه شده و نتایج حاصل از آن که عبارتند از قابلیت تغییر توان خروجی به میزان dbm 8.5 از dbm 2.6 تا dbm 11.1 و با بازده ...

Journal: :JIPS 2013
Do-keun Kwon Kihyun Chung Kyunghee Choi

One of the obstacles preventing the Zigbee protocol from being widely used is the excessive power consumption of Zigbee devices in low bandwidth and low power requirement applications. This paper proposes a protocol that resolves the power efficiency problem. The proposed protocol reduces the power consumption of Zigbee devices in beacon-enabled networks without increasing the time taken by Zig...

2013
N. Sunitha

In the present existing system, only Zigbee is used as a wireless communication device to transmit the sensed data to the control room through commercial platform Zigbee. A new system is presented in which the application of WSN (Wireless Sensor Network)/Zigbee is gaining popularity and connecting WSN/Zigbee to the present standard network seamlessly is an important issue. This paper presents t...

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