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To cope with the increasing demands of mobile devices and the limited capacity of cellular networks, mobile connections are offloaded to WiFi. The access capacity is further increased by aggregating backhaul bandwidth of WiFi access links. To analyze the performance of aggregated access links we develop a model for two and more cooperating systems sharing capacities using an offloading scheme. The...
With growing data demand and the current dearth of spectrum, mobile operators are looking for new frequency bands to satisfy data-hungry users. One promising avenue of expansion is TV white spaces, which are currently available to secondary users as long as they do not interfere with primary (i.e., incumbent) users. In this work, we explore the benefits of offloading cellular traffic onto TV white...
MANETS are heterogeneous, self configuring networks in which topology changes very frequently due to the mobility of nodes. Mobile nature of wireless nodes requires periodic updation of routing information and updating of other parameters. This paper majorly concentrates on the idea of discovering the Quality of service (QoS) parameters in Mobile Ad hoc Networks (MANETS) by providing an hybrid approach...
The growth of Mobile cloud computing (MCC) is challenged by the need to adapt to the resources and environment available for mobile clients while working with the dynamic changes of network bandwidth. In this paper, we propose a model of computation partitioning for stateful data in the dynamic environment that will improve performance. First, we constructed a model of stateful data streaming and...
The incremental needs of the wireless technologies came from the rapid proliferation of the mobile devices, which become one of the life necessities for people. The clear growth in the mobile application markets either in video, audio, or web surfing and with all the innovations and inventions in the technologies, the needs of using the wireless heterogenous networks become a fact. In this paper,...
Long Term Evolution (LTE) boasts several throughput enhancing techniques like optimized MAC layer protocols, better modulation schemes, spatial multiplexing, carrier aggregation, etc. Although these techniques allow LTE to offer data rates as high as 300 Mbps, LTE is expected to fall short of consumer expectations due to the exponentially increasing user data demands. In a bid to cope with the increasing...
An emerging usage is to rely on mobile devices (Smartphones or tablets) for large-scale events. They can be used for many applications like live voting or chatting, but also to access all the data related to an event. However, in such case, handling mobile devices trying to access data simultaneously is difficult. A Wi-Fi access point can only handle a limited amount of devices. Current solutions,...
Mobile Ad Hoc Networks (MANETs) merge wireless communication with higher node mobility. Restricted wireless communication range, and node mobility requires cooperation with all others to offer networking, and with the network changing vigorously, needs are to be continually met. Routing protocols allows MANET operation. To improve the performance of the routing, various constraints such as bandwidth...
In recent years, as higher performance terminal equipments are spread, the amount of mobile data traffic is growing rapidly by using popularization of streaming services in wireless networks. To overcome this situation, it is considered that Access Points (APs) are deployed densely for capacity improvement. In such an environment, virtualization is a possible technique to use multiple APs efficiently...
Due to dynamic wireless network conditions and heterogeneous mobile web content complexities, web-based content services in mobile network environments always suffer from long loading time. The new HTTP/2.0 protocol only adopts one single TCP connection, but recent research reveals that in real mobile environments, web downloading using single connection will experience long idle time and low bandwidth...
The exponentially increasing demand for higher data rates has pushed the mobile network operators and researchers to scout for ways to improve the system bandwidth, most notably by using the unlicensed band which already hosts long-standing technologies like Wi-Fi. Of late, some effort has gone into exploring the performance of Licensed-Assisted Access (LAA) which can boost the bandwidth of LTE by...
Due to the massive explosion of social networking and content sharing, it is becoming challenging to transmit a huge amount of multimedia content over wireless mobile networks. The existing paradigm of mobile multimedia sharing has yet to effectively address the energy and bandwidth limitations of wireless devices. Content-Centric Networking (CCN) has been proposed as a possible way to drive the current...
The newly imposed heterogeneous statistical delay- bounded quality of service (QoS) provisioning, which refers to the different/variable delay-bounded QoS guarantees among different wireless links, for the fifth-generation (5G) mobile multimedia wireless networks has received much research attention recently. The heterogeneous statistical delay- bounded QoS provisioning can be classified into two...
Performance analysis of the combined guard channels and Mobile assisted (M+G) handoff call admission control for two customer types is performed. A wireless cell which serves two types of calls; n-type (narrowband) and w-type (wideband) is considered. The total numbers of channels in the cell are divided into common and reserve channels. Originating calls are only served from the common channels,...
The mobility and Internet of Things (IoT) explosion has led to a severe wireless spectrum shortage which led to seeking new ways to alleviate the bandwidth crunch. Globally, wireless devices are becoming pervasive and consume network capacity and bandwidth at accelerated rates. Fourth generation (4G) networks based on the Long Term Evolution (LTE) offers significant upgrades over 3G in terms of data...
High downlink and uplink speeds are achievable with the aid of LTE. Providing this technology in real life requires scheduling algorithms that will effect the concepts such as throughput and fairness. In this paper some new averaging methods for proportional fair algorithm are proposed. Simulation results show that arithmetic mean method can increase spectral efficiency and fairness performance of...
Bluetooth is a low-energy consumption communication technology and a prospective communication method for emergency situations. A Classic Bluetooth communication network has been proposed and designed to establish an emergency mobile ad hoc network (hereinafter referred to as Classic Bluetooth MANETs). In Classic Bluetooth MANETs, a terminal can cause an excess of connection retries and connection...
We introduce POSTAL, a new range-free positioning protocol for mobile ad hoc networks (MANETs) that eliminates the need of constantly flooding the whole network with positioning information. The proposed protocol is based on regions of interest which are connected components of the MANET spanning a beacon (or reference) node and one or more nodes interested in estimating their position. These regions...
Heterogeneous networks, where small cells are deployed over the conventional macrocell networks provide a fast, flexible, cost-efficient, and fine-tuned design and expansion for existing cellular wireless networks to satisfy the ever increasing demand for network capacity. In HetNets, small cells offload users and their associated traffic from congested macrocells to provide better service to users...
A key property in tactical network environments is that the wireless network itself is typically the major limiting factor in how much information can be shared between users. In such environments, tactical operations often employ group communication protocols (one-to-many or many-to-many) to send information between users. This often results in situations where every message sent gets delivered to...
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