Abstract The most flexible and reliable technological system is Wi-Fi, which made possible by a wireless connection that transmits data using radio frequencies. Wi-Fi networks, however, encounter numerous issues related to power supply, availability, efficiency, security as result of the various access points. While relational waves describe medical device, radios produce are very dangerous for...

Abstract With the intensive development of urban rail transit in China, has increasingly become preferred mode transportation for citizens due to its convenience and speed. The design construction an efficient highly reliable system urgent requirement construction. This article mainly introduces research data communication subsystem CBTC system, intends provide some ideas directions studying sy...

The data acquisition equipment is very useful and popular equipment in agriculture and the other fields. This paper introduces the design of a portable data acquisition and communication system used in cropland. It collect signals of various analog and digital sensors, GPS space and time data, saving data by USB interface and transmission through WCDMA or Bluetooth. The key technology of the sy...

Received Aug 2, 2017 Revised Nov 24, 2017 Accepted Dec 18, 2017 ZigBee is an IEEE 802.15.4 standard for information interchanges with business and purchaser gadgets. It is composed around low-control utilization permitting batteries to keep going forever. The ZigBee standard gives system, security, and application bolster administrations working on top of the IEEE 802.15.4 Medium Access Control...