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QoS of applications in an edge node of mobile edge computing (MEC) could degrade due to congestion of wireless access or short of mobile edge computing resource. In order to improve QoS such as TCP throughput, we propose a VM migration method, which takes a VM from congested node to another node in a mobile edge. Users can choose a far but less-congested node, instead of a near but congested node...
ZigBee is a widely used wireless technology in low-power and short-range scenarios such as Internet of Things (IoT), sensor networks, and industrial wireless networks. However, the standard ZigBee supports only one data rate, 250Kbps, which thoroughly limits ZigBee's efficiency in dynamic wireless channels. In this paper, we propose Mrs.Z, a novel physical layer design to enable multi-rate selection...
Wireless sensor networks (WSNs) have been widely studied for decades due to their superior characteristics and promising applications. However, multi-hop WSNs suffer from serious collisions caused by hidden terminals, resulting in the decline of network performance and lifetime. Contention-free media access control (MAC) protocols can strictly avoid conflicts through channel resource partitioning...
The authors propose a new tool to extensively analyze and plan the radio resources based on machine learning technique using available data analytics methods like clustering, correlation and regression. This will be done through; Classifying the cells according to their Priority and required quality of service, detecting resources utilization that cause throughput limitation, efficient dimensioning...
Recent advances in Unmanned Aerial Vehicles (UAVs) have enabled countless new applications in the domain of aerial sensing. In scenarios such as intrusion detection, target tracking and facility monitoring it is important to reach a given area of interest (AOI), and create an online data streaming connection to a monitoring ground station (GS) for immediate delivery of content to the operator. In...
In this paper, a distributed Dual-Ring Tree scatternet formation is proposed to generate a reliable topology for Bluetooth networks. To mitigate the formation complexity, each root distributively connects with its downstream roots with local topology instead of global nodes information, instructs them to connect together, and generates a desired dual-ring subnet via distributed computation with three...
We consider the problem of throughput-optimal packet dissemination, in the presence of an arbitrary mix of unicast, broadcast, multicast and anycast traffic, in a general wireless network. We propose an online dynamic policy, called Universal Max-Weight (UMW), which solves the above problem efficiently. To the best of our knowledge, UMW is the first throughput-optimal algorithm of such versatility...
We investigate the potential gains of Physical-Layer Network Coding (PLNC) in multi-hop wireless networks. Physical-Layer Network Coding was first introduced as a solution to increase the throughput of a two-way relay channel communication. Unlike most wireless communications techniques which try to avoid collisions, PLNC allows two simultaneous transmissions to a common receiver. Such transmitted...
In this paper we propose a load balancing algorithm to increase the availability of network resources during peak local loads in wireless cellular networks. We simulate a network behavior in normal mode and with using the proposed method.
WLANs (Wireless Local Area Networks) have become ubiquitous in our everyday life, and are mostly based on IEEE 802.11 standards. In this paper, we consider the performance evaluation of an arbitrary-topology unsaturated network based on the IEEE 802.11 DCF. We present a conflict graph-based modeling approach to discover the attainable throughput of each node. Our model consists of a single Markov...
To increase the communication range of multi-hop cognitive radio networks (CRNs) while avoiding the implied loss in throughput, use of incremental relaying has been suggested. In this paper, we discuss an incremental relaying (IR) protocol for cooperative multi-hop CRNs (CMHCRNs). A CMHCRN with multiple decode-and-forward relays in each hop is considered. In each hop, the relays whose received signal-to-noise-ratio...
In this paper, a new queuing mechanism called proactive agile response (PAR) Queue proposed for the multi-hop wireless node that regulates the queue buildup and stabilizes the traffic flows under heavy traffic condition. The PAR uses multilevel packet marking with no additional computational complexity that notifies and controls congestion at its incipient stage. The PAR queuing algorithm supports...
Congestion occurs in the multi-hop wireless relay routers as the packet arrival rate outpaces traffic handling capacity. Congestion introduces packet loss, queuing delay and restraint formation of new connections in the networks. An intelligent queue management needed in the wireless relay routers that effectively regulate the queue accumulation and avoid network congestion. In this paper, an experimental...
Tactical networks are generally simple ad-hoc networks in design, however, this simple design often gets complicated, when heterogeneous wireless technologies have to work together to enable seamless multi-hop communications across multiple sessions. In recent years, there has been some significant advances in computational, radio, localization, and networking te, and session's rate i.e., aggregate...
In Cognitive Radio Networks (CRNs), the spectrum underlay approach enables primary and secondary networks to transmit simultaneously, as long as the interference from the secondary network to the primary network is below certain threshold. As the recent advancement of the underlay approach, the transparent coexistence exploiting MIMO interference cancellation was proposed. Previous works assume that...
In this work, we propose a cluster-based multihop relaying with partial relay selection (PRS) scheme for an energy harvesting (EH) relaying network. We analyze the performance in the framework of the decode-and-forward (DF) relaying with adaptive power splitting (APS) protocol over symmetric and asymmetric fading channel models. Through extensive numerical analysis, we show that the proposed scheme...
In wireless multihop networks, a sequence of data messages are transmitted along a predetermined wireless multihop transmission route. Collisions among wireless transmission signals from the intermediate wireless nodes cause reduction of the end-to-end data message throughput. Hence, avoidance and/or reduction of collisions between 2-hop neighbor intermediate nodes due to the hidden terminal problem...
In wireless multihop networks, a sequence of data messages are transmitted along a predetermined wireless multihop transmission route. Collisions among wireless transmission signals from the intermediate wireless nodes cause reduction of the end-to-end data message throughput. Hence, avoidance and/or reduction of collisions between 2-hop neighbor intermediate nodes due to the hidden terminal problem...
In recent years, a significant amount of research has been conducted to explore the benefits of network coding in different scenarios, from both theoretical and simulation perspectives. In this paper, we utilize queueing theory to propose an analytical framework for bidirectional unicast flows in multi-hop wireless mesh networks, and study throughput of inter-flow network coding. We analytically determine...
This paper proposes a joint design of the routing strategy over the fronthaul network and the transmission strategy over the wireless network in a downlink cloud radio access network (C-RAN), in which the remote radio heads (RRHs) are connected to the central processor (CP) via multi-hop routers. The data-sharing strategy is adopted, where the CP multicasts each user's data to all the RRHs serving...
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