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We consider a multi-relay system where the best single relay is selected to assist transmissions. We study the performance bound of the system in the finite blocklength regime. On the one hand, we extend Polyanskiy's finite blocklength model of a single-hop scenario to the considered relaying system and derive the corresponding achievable throughput. On the other hand, by employing a practical coding...
Conventional simultaneous wireless information and power transfer (SWIPT) schemes generally assume that only the currently harvested energy will be used for the following signal forwarding. As a result, it is impossible to amplify the signal in theory. And even unfortunately, the forwarded signal power is splitted and the forwarded signal will be subject to severe attenuation when compared to the...
Traditionally, network core devices are simple and the complexity is in the end-hosts. With the rise of Software- Defined Networking, this changes and complex functions are moved into the network core. This paper presents Transparent Transmission Segmentation (TTS), which is able to improve performance by executing parts of network functions at the core. An implementation for segmenting TCP connections...
This paper focuses on the wireless monitoring sensor networks (WMSNs), where provide relay connectivity for the low capacity and power devices to monitor or sense the events in a monitoring area. In this paper, we propose the relay OFDMA resource allocation methods of coloring resource allocation, static resource allocation and dynamic resource allocation to improve the finite resource of time and...
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, we study a wireless-powered two-way relay system, in which both wireless-powered sources exchange information through a multi-antenna relay. Both sources are assumed to have no embedded energy supply and thus first need to harvest energy from the radio frequency signals broadcasted by the relay before exchanging their information via the relay. We aim to maximize the sum throughput...
Using relayers in wireless networks enables higher throughput, increased reliability or reduced delay. However, when building networks using commercially available hardware, concurrent transmissions by multiple relayers are generally not possible. Instead one specific relayer needs to be assigned for each transmission instant. If the decision regarding which relayer to assign, i.e., which relayer...
The millimeter-wave (mmWave) bands, roughly referred to 30-300 GHz, have been widely recognized as a promising candidate for dense deployment of small- cells backhaul network. The dense small-cell deployment produces a huge amount of backhaul traffic, and directional communication poses a significant challenge. In this paper, we propose a dynamic frame reconfiguration scheme which provides greater...
One important aspect that needs to be carefully considered in maritime operations using unmanned robotic vehicles is the communication restrictions between the vehicles and the mission controller that arises mainly due to long distances and/or low power transmissions. This paper addresses the problem of maintaining a communication link between a command station and an Unmanned Aerial Vehicle (UAV)...
In vehicular ad hoc networks (VANETs), due to highly mobile and frequently changing topology, available resources and transmission opportunities are restricted. Transmitting frames efficiently within transmission opportunities is very important for system performance. Generally, there are many transmissions between many senders and receivers in a congested environment, which leads to network congestion...
In vehicular ad hoc networks (VANETs), due to highly mobile and frequently changing topology, available resources and transmission opportunities are restricted. Transmitting frames efficiently within transmission opportunities is very important for system performance. Generally, there are many transmissions between many senders and receivers in a congested environment, which leads to network congestion...
D2D cooperative communication is one of the essential requirements of the next generation networks. As human beings carry D2D devices, their emotions also play a prime role in cooperative data exchange. Several earlier works have discussed the various social factors; none has considered the significance of multiple social networks a user can have contact with. In this paper, we leverage the social...
A network of drone cameras can be deployed to cover live events, such as high-action sports game played on a large field, but managing networked drone cameras in real-time is challenging. Distributed approaches yield suboptimal solutions from lack of coordination but coordination with a centralized controller incurs round-trip latencies of several hundreds of milliseconds over a wireless channel....
The D2D communication has high potential to serve multiple users with high data rate within a proximity in the next generation cellular networks. In this paper, we consider a multicast scenario of D2D users where each user wishes to receive the same multicast data at varying data rates. Based on our best knowledge, finding an optimal solution to satisfy the user request in the said context requires...
In order to study the topology of the Earth-Mars relaying network with the Sun-Earth Lagrange points L4 and L5 used as the relaying nodes, 0–1 programming model on one-hop link and two-hop links was set up, the maximum throughput as the objective function, and total minimum throughput and accumulated connection time of each day as the constraint condition. A network topology is designed for one Earth-Mars...
Recent studies have experimentally shown the gains of full-duplex radios. However, due to its relatively higher cost and complexity, we can envision a more practical step in the network evolution is to have a full-duplex access point (AP) but keep the clients half-duplex. Unfortunately, the full-duplex gains can hardly be extracted in practice as the uplink transmission from a half-duplex client introduces...
Classical opportunistic relay selections always cause unequal power consumption among all relays. For the battery-operated relays in the cooperative networks, uneven power consumption among the relays may reduce the network lifetime and thus deteriorates the network performance. In this paper, a novel multi-relay selection scheme aiming at the increase of the network lifetime is proposed for the decode-and-forward...
Tor hidden services make it possible to hide Internet services' location. Via so-called rendezvous circuits, Tor users can communicate with hidden services without learning each other's location. In this paper, we propose a performance-enhanced rendezvous circuit, which consists of five instead of six relays. We show that omitting the client's middle relay in a rendezvous circuit brings significant...
Thanks to the abundant available bandwidth and multiple paths on wide-area links that interconnect datacenters on major cloud platforms, it is conceivable that bandwidth-intensive applications may improve their performance by relaying their traffic through such an inter-datacenter network. We propose Stemflow, a new systems framework that provides Inter-Datacenter Overlay as a Service. It is provided...
In this paper, a cross-layer-based sensor node selection scheme in a cooperative network with equally spatially correlated channels is proposed. The equally correlated model can be used as a worst-case benchmark or as a rough approximation by assuming equal correlation coefficients for all channels. By considering the physical and link layer characteristics, one or multiple sensor nodes are selected...
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