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A new approach is introduced to obtain the reliability function of time-dependent system by using reliable node and reliable path concept in mobile ad-hoc network (MANET). It is known that all nodes of the MANET are not functional at all the time. Upon the failure of any node in the active path of the network, the system switches to the next path and correspondingly the connection between the source...
User equipments (UEs) such as smartphones and tablets are widely used in heterogeneous wireless networks which include different technologies like WiFi and Long Term Evolution (LTE) systems. Implementing traffic steering effectively for user equipments to maximize their quality of service has become a key challenge these years. Therefore, in this paper, we propose a device controlled mechanism. We...
Vehicular Ad Hoc Network(VANET) is a technology which accommodate the vehicle to interconnect with each other through a wireless network. So that it can track and locate other vehicles to provide road safety. Any fixed infrastructure is missing so effective route for transporting data communication is established. Security is a major issue in VANET as it can be life threatening. VANET is a subclass...
The deployment of IEEE 802.11 based WLANs in populated areas is such that many mobile terminals are covered by several Access Points (APs). These mobiles have the possibility to associate to the AP with the strongest signal (best-RSSI association scheme).This can lead to poor performances and overloaded APs. Moreover, the well known anomaly in the protocol at the MAC layer may also lead to very unpredictable...
Mobile IP (MIP) was created to enable users keeping the same IP address while traveling to a different network because the mobility function of MIP is performed on the network layer rather than the physical layer so that users can continue their connections without sessions or connections dropped and they remain similar to destination. Mobile IP is scalable for a large number of users and it is most...
Mobile peer-to-peer (P2P) network is a simple computing network in which some of the mobile devices are communicated with peer-to-peer mode through access point. Energy efficiency in mobile P2P is improved by increasing the number of active nodes on the network and reducing the consumed energy by the number of idle nodes. However, if a lot of the number of active nodes perform the transmission process,...
Wireless data transfer between mobile users has become more popular nowadays. In Mobile Ad-hoc Network, mobile nodes communicate with each other through the wireless medium, within the transmission range. If we use the data access applications in the wired network, the physical cabling in the wired network is restricting the connection topology and the bandwidth. But there is no such a restriction...
Mobile traffic is growing tremendously as mobile internet is widespread. Users listen to music, watch video, send and receive photos, and take conversation over mobile messenger using mobile networks. Multipath TCP allows simultaneous use of multiple interfaces for a single TCP connection, which enables mobile device utilize 4G and Wi-Fi simultaneously. Many researches have proven in protocol stack...
Device-to-Device (D2D) communications provide the means to users of cellular networks for reusing licensed spectrum by creating a direct link between two devices. However, enabling D2D communications in a cellular network presents a challenge in resource allocation because of the potential severe interference it may cause to the cellular network due to the reuse of the spectrum with the cellular users...
Device-to-device (D2D) communication can improve system spectrum efficiency in mobile networks; however, existing D2D resource allocation techniques may not work well in 5G mobile networks with many simultaneously connected devices. To address this problem, we study the multi-sharing resource allocation problem, which allows any cellular user equipment to share its radio resource with multiple D2D...
Along with the exponential growth of mobile data traffic over the past few years, dense small cell networks are considered an attractive solution to cope with the mobile traffic demand. However, users of small cells in dense environment are exposed to serious co-tier interference problem and users at the edge of small cells have worse performance especially. In order to improve the performance of...
The major challenge for the development of Turbo-Code decoders for the 3GPP LTE/LTE-A standard is the support of very high code rates while achieving a high throughput with a low decoding latency. For high code rates the decoding process can oscillate, i.e. although the decoder converges to a valid code word in the nth half-iteration, the code word after the n+1th half iteration can be invalid again...
As the number of small cells is increased to improve mobile network capacity, disparity in the traffic load between small cells will unexpectedly widen, and then user throughput in a small cell with high traffic load will decrease. We propose a novel coverage control method that adaptively controls cell coverage for areas where users are densely located by using cell-specific beamforming with multiple...
This paper introduces and analyzes a novel mobile access coordinated wireless sensor network (MC-WSN) architecture. In conventional sensor networks with mobile access points (SENMA), the mobile access (MA) points traverse the network to collect information directly from individual sensors. While simplifying the routing process, a major limitation with SENMA is that data transmission is limited by...
Reduction of energy consumption is becoming a crucial aspect of wireless communications, due to the need of lowering CO2 emissions and enhancing mobile network operators OPEX. In this work we consider a heterogeneous mobile network topology with coexisting macrocellular and microcellular Base Stations (BSs). By employing two energy optimization heuristics we determine operational profiles for the...
We present testbed experiments of multi-source mobile video streaming that jointly exploits mobility and throughput prediction to prefetch video data in caches located at hotspots that the mobile will encounter and device-to-device (D2D) communication to opportunistically obtain parts of a video from neighboring mobile devices. A contribution of this paper includes a procedure to efficiently utilize...
Video streaming is the most popular application in today's mobile Internet and its growing demands and popularity put more and more load on cellular networks. In a recent trend to mitigate the cellular load, followed by many providers, users are offered to offload mobile connections to WiFi hotspots, which are predominately deployed in urban environments. In this work, we conduct a simulative performance...
Recently, there has been a tremendous increase in demand for mobile data driven by the wide-spread usage of smartphone like devices. Besides the efforts of studies that propose ways for operators to handle this huge growth, there is also an emerging research area of analyzing this new type of user data. In this paper, we perform an analysis on mobile user data to understand general aggregated user...
Downlink throughput is the most widely used and accepted Quality of Service (QoS) related feature within the networking community, specially in the operational field. Current quality monitoring and reporting systems as well as quality benchmarking campaigns use the Average Downlink Throughput (ADT) as metric to assess the performance of the network. For example, flow-based monitoring systems normally...
Mobile ad hoc network is an arbitrary network in which all the nodes are mobile and consists of limited battery power and channel bandwidth. Ad hoc network often deployed in emergency situations, therefore saving resources i.e. power in such situations is prime importance. In this paper, an algorithm MAODV (Ad Hoc on demand distance vector routing using threshold power to route the packet) has been...
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