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Lightweight control planes are techniques that create a control plane in WiFi networks without any additional spectrum requirements. Flash signals are an example of such control signals that exploit the link margin that typically exists in WiFi communication. In this paper we consider the problem of allowing transmitters and receivers of a transmission to exploit such control channels while the communication...
WiFi technology has gained a wide prevalence for not only wireless communication but also pervasive sensing. A wide variety of emerging applications leverage accurate measurements of the Channel State Information (CSI) information obtained from commodity WiFi devices. Due to hardware imperfection of commodity WiFi devices, the frequency response of internal signal processing circuit is mixed with...
A new wideband beam steering architecture for a receiver and transmitter is proposed. In this new interpolation based beam steering architecture (IBA), the number of true time delays can be dramatically reduced to 3 for a 2-dimensionaI array and 2 for a linear array independent of the number of array elements. While in conventional phased arrays, the number of phase shifters or time delays equals...
A 13.56 MHz wireless power receiver designed with standard CMOS 0.35 μm process used for implantable medical devices (IMDs) is presented. By adopting a one-stage 0X/1X reconfigurable resonant regulating (R3) rectifier, the proposed architecture inherently avoids system voltage conversion ratio (VCR) variation and power conversion efficiency (PCE) degradation problems and thus widens the operation...
A 40 Gb/s PAM4 receiver with novel digital clock and data recovery (CDR) and one tap decision feedback equalizer (DFE) has been presented. Without sophisticated transition detection and selection modules, the proposed CDR utilizes three bang-bang phase detectors sampling all the transitions to detect the phase error between the data and clock, achieving larger transition density and CDR bandwidth...
The millimeter-wave propagation characteristics at 60 GHz in indoor environment are simulated and analyzed based on the method of shooting and bouncing ray tracing/image (SBR/IM). A good agreement is achieved between the measured results and simulated results, so the correctness of SBR/IM method has been validated. Some propagation parameters are obtained in the simulation at 60 GHz millimeter-wave...
Existing indoor lighting systems consisting of incandescent bulbs and compact fluorescent lamps(CFLs) are being replaced by light emitting diodes(LEDs) at a much faster pace than envisaged. Such lighting systems are highly energy efficient, cost effective as well as environment-friendly. LEDs can also be used simultaneously for establishing indoor communication infrastructure known as visible light...
We introduce a new, simple, yet effective scheme for reducing the impact of receiver buffer blocking in Multipath TCP (MPTCP). This blocking primarily occurs when the paths have different characteristics. This phenomenon is due to the limited size of the MPTCP receiver buffer. In a nutshell, our scheme allows, under certain conditions, the retransmission of a segment by a different interface than...
The Internet of Underground Things (IOUT) has many applications in the area of smart lighting. IOUT enables communications in smart lighting through underground (UG) and aboveground (AG) communication channels. In IOUT communications, an in-depth analysis of the wireless underground channel is important to design smart lighting solutions. In this paper, based on the empirical and the statistical analysis,...
In this paper, we consider a cognitive satellite-terrestrial network where the satellite communication operates in the microwave frequency bands allocated to terrestrial networks in an underlay mode. Taking the statistical delay quality-of-service (QoS) requirements into account, we investigate the effective capacity of the satellite network while satisfying interference-power limitations imposed...
While buffer-aided relaying improves the diversity of a multi-hop network, its deployment introduces time-delays, thus rendering buffering unreliable for delay-intolerant applications. To alleviate excessive delays, various studies propose delayaware protocols, but at the expense of reduced diversity, and consequently, increased outage probability. Attempts to maintain the diversity of the system...
Research and development on video streaming over vehicular ad hoc networks (VANETs) have expanded rapidly in the last few years. In order to improve road safety and to satisfy road users requirements, video streaming has been proposed to disseminate continuously, an accurate video data, concerning traffic circumstance, travel information, divertissement, etc. High quality video streaming in vehicular...
We study the broadcast transmission of a single file to an arbitrary number of receivers in a wireless one-hop setting, using random linear network coding (RLNC). In contrast to similar studies, we apply RLNC within segments of the file. In a previous study, we showed that this method can achieve near optimal file transfer completion time while tackling the main drawbacks of RLNC; increased decoding...
Rise in population aging as well as diffusion of chronic diseases and health consciousness require constant monitoring of health conditions but also lead to increasing costs for the governments. Body Area Networks represent the next frontier in health care and are envisaged as the natural choice to provide detailed and updated information on health status to prevent health risks and diseases. However...
Data center applications require strict characteristics regarding packet loss, fairness, head-of-line blocking, latency, and low processing overhead. Motivated by the emergence of IEEE Data Center Bridging, we explore the possibility of controlling congestion in Ethernet layer while guaranteeing those requirements. We propose HetFlow (Heterogeneous Flow) as a delay-based congestion control mechanism...
Satellite networking is known to suffer from specific network performance issues, such as high latency and low throughput stability; this derives mainly from the high propagation delay, in particular with GEO satellites. This characteristic poses limitations on the benefits that general AQM solutions could introduce; in fact, reducing congestion and mitigating queueing delay is a vital feature that...
This paper deals with the wireless edge caching and investigates a cellular network, where both base-stations (BSs) and distributed devices have caching capabilities. The proposed caching policy allows each device to cache files according to the user's preferences, while the most requested files are cached in the BSs. In this way, a three-level hierarchical connectivity scheme is employed, where a...
To achieve scalable performance, datacenter applications (e.g., search and social networking) are designed to have high fanout. However, such a design leads to frequent fabric congestion (e.g., due to incast, imperfect hashing) even when the utilization is low. Such fabric congestion exhibits spatial (e.g., within a rack and across racks) as well as temporal variations. Unfortunately, current approaches...
In this paper, we design a fast and efficient energy-based and asynchronous neighbor discovery protocol for the Internet of Things (IoT). In our solution, we relax the assumption of frame-level synchronization. We formulate a novel asynchronous group testing scheme and apply it to the neighbor discovery problem. We then show that our proposed scheme is able to detect the set of K active neighbors1...
5G backhaul requires high bandwidth and hybrid Radio Frequency/ Free Space Optical (RF/FSO) Communication offers Gbps links. The weather affects availability of both mmW RF and FSO links. Below cloud ceiling, the availability of hybrid RF/FSO link is above 85.7% and it can only be used for deadline-constrained large data transfers. At 17–22km above ground, the bit error rate of FSO links reaches below...
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