Wireless embedded systems, especially life-critical body-area networks, need security in order to prevent unauthorized and malicious users from injecting traffic and accessing confidential data. Coupled with the security costs in system performance and power consumption, embedded systems are also restricted by the type of security that can fit in their limited memory. To address these issues, w...

The content of this paper is determined by the relevance wireless sensor network standards. discusses diversity networks. Personal standards are presented. In particular, a detailed analysis GPRS technology Various data transmission protocols Data speeds briefly reviewed. evolution Bluetooth rates described. Standards for discussed in detail, an overview advantages and disadvantages these given...

__Continuous Monitoring of vital signs of a patient by Wireless Sensor network (WSN) can help in diagnosis and can monitor patient’s history in routine life activities to provide accurate diagnosis. Doctors can check the complete details of patients from remote location and can recommend a suitable medication. The main purpose of this technology is to reduce the load at hospitals and provide ef...

designing wireless sensor networks should meet appropriate parameters such as quality of service (qos) defined by different users. the variable physical conditions of the environment, processing and transmission power limitations and limited communication capabilities are the most important obstacles that influence qos parameters such as throughput, delay, reliability and network lifetime. the ...

Wireless body area network, WBAN, is a network designed by low-power devices that are located on, in or around the human body and are used to monitor physiological signals and motion for medical, personal entertainment and other applications and purposes In Wireless Body Area Network, Sensor nodes are typically powered with battery, which have insufficient life time. Even though renewable energ...

a wireless sensor network (wsn) is a wireless decentralized structure network consists of many nodes. nodes can be fixed or mobile. wsn applications typically observe some physical phenomenon through sampling of the environment so determine the location of events is an important issue in wsn. wireless localization used to determine the position of nodes. the precise localization in wsns is a co...