Multicast routing is one of the most important services in Multi Radio Multi Channel (MRMC) Wireless Mesh Networks (WMN). Multicast routing performance in WMNs could be improved by choosing the best routes and the routes that have minimum interference to reach multicast receivers. In this paper we want to address the multicast routing problem for a given channel assignment in WMNs. The channels...

For Wireless Personal Area Network (WPAN) systems, resource allocation between several users within a piconet and the coexistence of several piconets are very important points to take into consideration for the optimization of high data rate Ultra Wide Band (UWB) systems. To improve the performance of the Multi Band OFDM (Orthogonal Frequency Division Multiplex) solution proposed by the Multi B...

This paper proposes a multi-cluster wireless powered Internet of Things (WP-IoT) network assisted by multiple intelligent reflecting surfaces (multi-IRS). In this network, power station (PS) first broadcasts energy to the distributed IoT devices grouped into clusters. The then use harvested convey their information an access point (AP), based on hybrid time- and frequency-division (TDMA-FDMA) p...

Time Saving and energy consumption has become a vital issue that attracts the attention of researchers in Underwater Wireless Sensor Networks (UWSNs) fields. According to that, there is a strong need to improve MAC protocols performance in UWSNs, particularly enhancing the effectiveness of ALOHA Protocol. In this paper, a time-saving Aloha protocol with slotted carrier sense proposed which we c...

Abstract. Ad hoc and multi-hop networks will probably be part of the fourth generation of wireless networks, which will integrate networks of several size and capacities with heterogeneous coverage: cellular networks (3G), WLAN hot spots, Wireless Personal Area Networks (WPAN) and Wireless Body Area Networks (WBAN). In this context, MAC protocols play a deciding role for a high utilization of t...

In this paper, we introduce a novel signal shaping approach for multi−carrier systems. We propose to combine Hermite functions in order to get a good time−frequency localization property for multi−carrier signals, which is important for robustness against the time−frequency dispersion of the wireless channel. In our work, we orthogonalize the linear combination of Hermite functions in order to ...

By applying fast sweeping of the laser wavelength at the headend station and a multipassband optical filter at the antenna stations, multi-GHz radio signals can be distributed cost-effectively using GIPOF links in a wireless LAN. Data signal transparency and simple antenna stations are obtained. First simulations have shown the feasibility of the system concept. Introduction Wireless LANs are m...

In order to link a source-destination node pair in inter-working multi-hop wireless networks, links or routes must first be available. It is only after establishing the availability of links and routes between nodes that factors which affect connectivity e.g. interference can be considered. Connectivity in multi-hop wireless networks has been studied. However, the studies focused on network con...

Over the past decade wireless multi-hop ad-hoc networks have received a tremendous amount of research focus. Mobile devices equipped with wireless short range communication technologies make possible new applications for spontaneous communication, interaction and collaboration. The collaboration is used to facilitate communication when mobile devices are not able to establish direct communicati...

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 ...