Error free transmission is one of the main aims in wireless communications. With the increase in multimedia application, large amount of data is being transmitted over wireless communications. Due to the channel fading and the Doppler shifts caused by user mobility, a common problem in wireless systems, additional technologies are needed to combat multipath propagation fading and Doppler shifts...

Overview of Proposed Work Guaranteeing reliable and ubiquitous signal reception is one of the current challenges faced by wireless communications systems. Ideally, wireless transmissions suffer only from propagation losses. In reality, the landscape through which wireless information travels often contains structures that contribute to significant losses in signal reception. This is largely a r...

IEEE802.11s draft proposes a new medium access control (MAC) function-mesh deterministic access (MDA), which is mainly used for single-channel wireless mesh local area network (LAN). In single-channel environment, collisions between control packets and data packets may occur very often. In order to provide higher performance and network capacity for wireless mesh LAN, this article develops an a...

Wireless Sensor Networks (WSNs) are a specific category of wireless ad-hoc networks where their performance is highly affected by application, life time, storage capacity, processing power, topology changes, the communication medium and bandwidth. These limitations necessitate an effective data transport control in WSNs considering quality of service, energy efficiency, and congestion control. ...

Guaranteeing reliable and ubiquitous signal reception is one of the current challenges faced by wireless communications systems. Ideally, wireless transmissions suffer only from propagation losses. In reality, the landscape through which wireless information travels often contains structures that contribute to significant losses in signal reception. While increasing broadcast power will boost s...

Wireless scheduling plays an important role in the design of advanced wireless networks as it determines the QoS provisioning over the wireless link. Compared to its wired counterpart, the design of wireless schedulers is a much harder and challenging problem due to the unique characteristics of the wireless channel. While recent work focused on the design of wireless schedulers to meet a given...

Wireless research and development requires effective and efficient simulation and emulation tools to validate and evaluate wireless designs. Wireless channel models are used in the tools to simulate signal propagation properties in the real physical world. However, due to practical issues, these models are often too generalized and simplified in large scale experiments, and they only provide li...

To facilitate the efficient support of quality of service (QoS) in third generation (3G) and fourth generation (4G) wireless networks, it is essential to model a wireless channel in terms of connectionlevel QoS metrics such as bandwidth, delay and packet loss ratio. However, the existing wireless channel models do not explicitly characterize a wireless channel in terms of these QoS metrics. In ...

Equipping mesh nodes with multiple radios that support multiple wireless channels is considered a promising solution to overcome the capacity limitation of single-radio wireless mesh networks. However, careful and intelligent radio resource management is needed to take full advantage of the extra radios on themesh nodes. Flow-radio assignment and channel assignment procedures should obey the ph...

Measurements of a wireless channel’s spatial correlation provide guiding knowledge for developing multi-antenna wireless systems that exploit the channel’s spatial diversity. Typical measurements of spatial correlation obtained by moving an antenna array through a wireless channel provided limited correlation data that cannot be generalized to antenna arrays with different geometries. In contra...