With the rapid growth of wireless access networks, various providers offer their services using different technologies such as Wi-Fi, Wimax, 3G, 4G and so on. These networks compete for the scarce wireless spectrum. The spectrum is considered to be a scarce resource moderated by the spectrum allocation regulatory (“regulatory” for short) which is the governance body aiming to maximize the socia...

In this paper we explore some important applications of wireless sensor networks (WSNs). There are 8 Sections. Section 2 discuss structural monitoring. We present how WSNs used in traffic control 3. 4 shows the use field telemedicine. Pipeline monitoring with illustrated 5 and WSN precision agriculture 6. 7 usage natural disaster is explored. Finally, conclusion given 8.

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...

Wireless mesh network is an advanced form of wireless network. Wireless Mesh networks is the key technology for represent an emerging wireless networking technology that promises wider coverage than traditional wireless LANs and lower development and operation cost than 3G cellular networks. Wireless mesh networks can be implemented with various wireless technologies including IEEE 802.11. Rout...

wireless sensor networks are the new generation of networks that typically are formed great numbers of nodes and the communications of these nodes are done as wireless. the main goal of these networks is collecting data from neighboring environment of network sensors. since the sensor nodes are battery operated and there is no possibility of charging or replacing the batteries, the lifetime of ...

Sybil attacks pose a serious threat for Wireless Sensor Networks (WSN) security. They can create problems in routing, voting schemes, decision making, distributed storage and sensor re-programming. In a Sybil attack, the attacker masquerades as multiple sensor identities that are actually controlled by one or a few existing attacker nodes. Sybil identities are fabricated out of stolen keys, obt...