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A major challenge in wireless sensor network (WSN) is data collection in a disconnected network while ensuring a viable throughput for the sensors or the nodes in the network. Incorporating mobility-assisted data collection where no other means of data gathering is feasible is a growing trend among researchers. There are many works in literature which exploit mobility to derive throughput using protocol...
Cognitive radio networks will play important role in future wireless networks. This paper proposes a new resource allocation strategy in cooperative multi-relay cognitive radio networks, in which multi second users can work as the relays of primary users to accelerate the data transmission when the channel between primary transmitter and primary receiver is weak. In the strategy, the data transmission...
The 5G cellular networks has brought along with it a plethora of the connected devices which turned the scales from human-centric to device-centric communication leading to more issues in the spectrum reuse. In this context, this article tackles the resource allocation issue within D2D communications underlay uplink in 5G networks. We focus our study on maximizing the overall system throughput and...
In cognitive radio (CR) systems, secondary transmitters (STs) should have etiquette that its transmission is not harmful to primary communication. Limiting transmitting power of ST is a usual way of being polite in a physical-layer point of view. In this paper, we assume that a primary user (PU) has a desire to keep its stable throughput though ST intervenes, which is a network-layer goal. And we...
Due to rapid increase of network bandwidth, applications and systems working in long fat network (LFN) play more important roles. For effective development of them, precise measurements of network conditions are significant. Transmission Control Protocol (TCP) is the most commonly used protocol, but is essentially unable to achieve high throughput in LFNs with packet losses. For this reason, it is...
Device-to-Device communication is an essential component in the evolution towards the Internet of Things. The relatively new WiFi-Direct standard allows devices to communicate directly over the well established IEEE 802.11 protocol without the need for an intermediate access point. The increased range and bandwidth advantage of WiFi-Direct over existing short-range technologies such as Bluetooth and...
In this paper, we analyze the relationship between the achieved Quality of Experience (QoE) of the web browsing network service and in-service network parameters obtained by passive monitoring. With this regard, we conducted experiments where the user QoE and in-service parameters are measured simultaneously, where the latter are derived from traffic data captured by passive probe on the Gn interface...
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