It is well known that both the IEEE 802.15.4 wireless standard for low power, low data-rate sensor networks, and the IEEE 802.11 wireless local area data networks, operate in the 2.4GHz industrial, scientific and medical (ISM) band. If the networks are in physical vicinity of each other to cause packet interference, most often, it is the 802.15.4 traffic that is adversely affected given the low...

The IEEE 802.11-based WiFi wireless technology is one of the most promising technologies to provide ubiquitous networking access. The IEEE 802.11 working group has always strived to improve this wireless technology through creating new amendments to the base 802.11 standard. Recently, IEEE 802.11n amendment was created to enhance 802.11 for higher throughput operation. Not only new Physical Lay...

ABSTRACT IEEE 802.16 WiMAX is a promising technology to provide broadband wireless networking access. IEEE 802.16j Mobile Multihop Relay standard introduces multihop relaying to WiMAX system. Relay stations are used to extended network coverage and enhance system throughput. To reduce power consumption, an idle mode MS does not send location update messages while moving across cell borders. Pag...

Handover performance is an important factor for wireless networks, especially nowadays, when multimedia services are becoming increasingly available over the wireless devices. However, users expect uncompromised mobility when using the service. Thus, the support of multimedia services is not possible if handover is inefficient. At the same time it is clear that a strict separation between IP La...

A major obstacle to widespread acceptance of formal verification is the difficulty in using the tools effectively. Although learning the basic syntax and operation of a formal verification tool may be easy, expert users are often able to accomplish a verification task while a novice user encounters time-out or space-out attempting the same task. In this paper, we assert that often a novice user...

We devise the Unit Commitment Nearest Neighbor (UCNN) algorithm to be used as a proxy for quickly approximating outcomes of short-term decisions, to make tractable hierarchical long-term assessment and planning for large power systems. Experimental results on an updated version of IEEE-RTS96 show high accuracy measured on operational cost, achieved in runtimes that are lower in several orders o...

This paper examines the power consumption of IEEE 802.11standards with distance variations. The effectiveness of each standard is analysed over a small wireless network. Experiments carried out to analyse power consumed by 802.11 standards show that energy consumed during transmission of data is higher than that consumed during reception. Results from experiments carried out show that the power...