Wireless sensor networks(WSN) have unique properties that distinguished them from other wireless networks and have special challenges. Not-chargeable, not-changeable and limited power supplies of sensor nodes is the most important challenge of this networks, and if the power supply of node expired, a part of data maybe lost. Because of the importance of covers in wireless sensors, in this work ...

The wireless body area network (WBAN) can monitor human physiological information for a long time and alleviate problems such as the imbalance of medical resources distribution population aging. complex media may make data transmission unstable in networks. A delay-tolerant WBAN opportunity method based on priority was studied. In this method, historical states between links are recorded by sli...

This study presents a low-cost, compact, flexible, and wideband wearable antenna for different wireless body area network (WBAN) band applications, covering medical of 2.4 GHz, industrial, scientific, 2.45 WiMAX 3.5 local 5.2 GHz. The final topology is obtained by hexagonal microstrip radiator patch fabricated on commercially available low-cost photo paper substrate defected ground plane below ...