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The availability and reasonable cost of broadband Internet made it an attractive and favourable option to billions of users worldwide. Being a fast service also encourages its users to use real-time applications which is streaming and live data transfer includes VoIP and video streaming. The performance of such applications in Wireless Local Area Network (WLAN) may be highly affected by security protocols...
IEEE 802.11ah and Bluetooth Low Energy (BLE) are candidates to become key technologies for many Internet of Things (IoT) applications. In this paper, 802.11ah and BLE technologies are evaluated and compared in a home automation scenario. The selected use case includes battery powered sensors, which generate traffic, and mains powered actuators, which consume traffic, connected through a central gateway...
Wireless Local Area Network (WLAN) has enabled greater communication capabilities compared to LAN counterpart. However, when it comes to quality of service (QoS), WLAN has lower reliability, where it has higher latency and packet-loss, especially for real-time streaming applications such as voice over internet protocol (VoIP) and multimedia. Thus, improving QoS in WLAN is a major research challenge,...
The evolution of wireless networks involves the development of several standards, considering different radio access technologies. In a scenario of integration of heterogeneous access technologies, the optimization of vertical handover involves the need of reduction of authentication delays. In this paper, the authentication latency is evaluated by the utilization of an analytical model, considering...
Future safety-related vehicular applications require reliable information exchange provided by cooperative Vehicular Ad-hoc NETworks (VANETs). Although the vehicular WLAN standard IEEE 802.11p has been adapted to the challenging vehicular environment, it has not been adapted to the stringent communication requirements imposed by vehicular applications. In particular, broadcast transmissions are mostly...
In this paper, we have observed that the performance analysis of one of the most challenging security issue for wireless network i.e. Black hole attack. WiMAX-WLAN interface will play a important role in the NGN (Next generation Network) scenario. This attack is possible in WiMAX-WLAN interface network i.e. in current scenarios. In this paper we analyzed the performance analysis of Performance Analysis...
Nowadays, with increase in ageing population, Health care market keeps growing. There is a need for monitoring of Health issues. Body Area Network consists of wireless sensors attached on or inside human body for monitoring vital Health related problems e.g, Electro Cardiogram (ECG), ElectroEncephalogram (EEG), ElectronyStagmography(ENG) etc. Data is recorded by sensors and is sent towards Health...
In this paper researched precise accurate Time Stamping for positioning. Though existing Time Stamping only executed at the WLAN MAC layer, this paper suggest time stamping method using the additional TPU to minimize messages transmit delay for precise time detection between MAC and PHY.
Finding the available network capacity for a TCP connection is an important research problem as it allows the connection to improve its throughput and fairness in addition to reducing packet losses. As flows arrive and depart randomly in the network, the state of a TCP connection at any instant is very dynamic and a good estimate of the available capacity can enable TCP to quickly adapt to the actual...
The function of multi-rate support (14 rate ranks from 1Mbps to 54Mbps) in PHYs is prescribed in IEEE 802.11 protocol. To analyze the serious affects to the throughput of whole networks caused by the low- rate access nodes, a precise algorithm is proposed based on the improved Markov model in DCF protocol. The throughput of WLAN is conducted with low-rate access nodes, and the simulation results with...
In Wireless Local-Area Networks (WLANs), most of the wireless Access Points (APs) work at the full power level. So, the conflicting channels may have a significant and inevitable impact on throughput and transmission delay when the density of the APs is increasing. This paper proposes a power control algorithm, Dynamic Power Control called DPC based on NetFlow. DPC applies a fine tuning idea to get...
Currently, there are several wireless access networks available to support mobile users. Furthermore, new services have also emerged and aim to allow such mobile users to access the services from anywhere at any time without interruption while moving across heterogeneous wireless access networks. The new services require internetworking and integrated solutions between existing heterogeneous wireless...
Due to overlapping frequency bands, IEEE 802.11a WLAN and Ultra Wide-Band systems potentially suffer from mutual interference problems. This paper proposes a method for inserting frequency notches into the IR-UWB power spectrum to ensure compatibility with WLAN systems. In contrast to conventional approaches where complicated waveform equations are used, the proposed method uses a dual-pulse frequency...
The spread of the Internet has given rise to strong demands for real-time services such as voice and streaming video. Since these services require guarantees that may include transmission rate, delay, and delay variance, the network, including the wireless access networks, must offer quality of service (QoS) guarantees. However, no radio access system fully supports QoS controls. In this paper, we...
This paper introduces concept and merits and demerits of wireless local area network (WLAN), analyzes the IEEE 802.11 series standards of WLAN. Based on simulation platform OPNET, the network model, node model and process model of distributional WLAN are constructed. The network performances of WLAN under 802.11 series standards are studied. The results indicate that setting different network parameters...
The configuration of WLAN MAC by means of Super Frame (SF) and Contention Free Period (CFP) variation is one of the effective schemes to provide QoS to interactive multimedia (IMM) traffic. In this paper we investigate the usefulness of an auto-generated dynamic parameter set of CFP and SF combinations as the logical look-up table for the WLAN medium access control scheme. A modified analytical model...
Vertical handoff plays an important role to provide seamless connectivity for a mobile user in an overlapped multinetwork environment. On the other hand in order to maintain network stability, efficient management of available radio resource becomes crucial as network operators want high network utilization and maximum profit generation. For vertical handoff management, existing research works considered...
The usage of video streaming over the wireless devices especially the smart mobile phone is growing very rapidly. However to maintain the quality of service is a challenging tasks. The parameters such as Delay, Packet Loss and Jitter play important roles in ensuring the quality of video streaming over WLAN. In this paper, the performance of video streaming over wireless-N was studied in two different...
The aim of this paper is to improve the energy efficiency during network discovery in heterogeneous networking environments. To this end, we propose a novel network discovery algorithm that exploits both user and network context information in order to efficiently adapt the network scanning period, thus avoiding unnecessary energy-consuming scanning or mis-detection of available networks that can...
Increasing demand for ubiquitous high speed data access has resulted in widespread deployment of heterogeneous wireless networking domains. Integration of heterogeneous networks presents some considerable challenges which include the demand for seamless handoff, continuity of data traffic & multimedia sessions and central authentication system, billing & security. In this paper the...
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