Ultra low power communication mechanisms are essential for future Internet of Things deployments. Bluetooth Low Energy (BLE) is one promising candidate such We study the energy consumption BLE by measuring real devices with a monitor and derive models basic behavior observed from measurement results. investigate also overhead Ipv6-based over BLE, which relevant IoT scenarios. contrast our results performing similar measurements ZigBee/802.15.4 devices. Our show that when compared to ZigBee,...

Energy conservation in battery powered mobile devices that perform wireless multimedia streaming has been a significant research problem since last decade. This is because these consume lot of power while receiving, decoding and ultimately, presenting the content. What makes things worse fact technologies have not evolved enough to keep up with rapid advancement devices. survey examines solutions proposed during few years, improve energy efficiency hand-held We categorize work according...

Dangers associated with poor air quality are driving deployments of monitoring technology. These rely on either professional-grade measurement stations or a small number low-cost sensors integrated into urban infrastructure. In this article, we present research vision real-time massive scale sensing that integrates tens thousands even millions to monitor at fine spatial and temporal resolution. We highlight opportunities challenges our by discussing use cases, key requirements, reference...

Nearly all bitrate adaptive video content delivered today is streamed using protocols that run a purely client based adaptation logic. The resulting lack of coordination may lead to suboptimal user experience and resource utilization. As response, approaches include the network servers in process are emerging. In this article, we present an optimized solution for assisted specifically targeted mobile streaming multi-access edge computing (MEC) environments. Due NP-Hardness problem, have...

We study performance characteristics of convolutional neural networks (CNN) for mobile computer vision systems. CNNs have proven to be a powerful and efficient approach implement such However, the system depends largely on utilization hardware accelerators, which are able speed up execution underlying mathematical operations tremendously through massive parallelism. Our contribution is characterization multiple CNN-based models object recognition detection with several different platforms...

Wireless data transmission consumes a significant part of the overall energy consumption smartphones, due to popularity Internet applications. In this paper, we investigate characteristics over Wi-Fi, focusing on effect flow and network environment. We present deterministic models that describe Wi-Fi with traffic burstiness, performance metrics like throughput retransmission rate, parameters power saving mechanisms in use. Our are practical because their inputs easily available mobile...

Road safety is one of the most important applications vehicular networks. However, improving pedestrian via vehicle-to-pedestrian (V2P) wireless communication has not been extensively addressed. In this paper, our vision to propose a method which enables development V2P road and only utilizing existing infrastructure devices. As pedestrians' smartphones do support IEEE 802.11p amendment customized for networking, we have initiated an approach that utilizes cellular technologies. Study shows...

Cloud gaming enables playing high-end games, originally designed for PC or game console setups, on low-end devices such as netbooks and smartphones, by offloading graphics rendering to GPU-powered cloud servers. However, transmitting the high-resolution video requires a large amount of network bandwidth, even though it is compressed stream. Foveated encoding (FVE) reduces bandwidth requirement taking advantage non-uniform acuity human visual system knowing where user looking. Based...

Previous studies have shown that a significant part of the overall energy consumption battery-powered mobile devices is caused by network data transmission. Power models describe power behavior transmission are therefore an essential tool in estimating battery lifetime and minimizing usage devices. In this paper, we present simple practical model for over 802.11g WLAN show its accuracy against physical measured from three popular platforms, Maemo, Android Symbian. Our estimates based on flow...

Video streaming on smartphones is one of the most popular but also energy hungry services today. Using mobile video results in two contradictory sources waste for smartphones: i) because excessively aggressive prefetching content that user will not watch abandoning session, and ii) excessive amount tail energy, which wasted by keeping wireless interface powered after receiving a chunk content; this caused chunks are too small. To remedy this, we propose novel download scheduling algorithm...

Air pollution is a major problem in urban areas, where high population density accompanied with excess anthropomorphic emissions impacting the environment and increasing health effects. Highly accurate air quality monitoring stations have been used to monitor severity of warn citizens. However, can vary sharply even within same city block, exposure 30% between individuals living residence. Therefore, dense deployment sensors needed detect these variations, protect citizens from overexposure....

Pedestrian detection using wireless communication complements sensor-based pedestrian in driverless and conventional cars. This fusion improves road-safety particularly obstructed visibility bad weather conditions. paper seeks developing such wireless-based vehicle-to-pedestrian (V2P) collision avoidance energy-efficient methods non-dedicated existing technologies namely smartphones (widespread among pedestrians drivers), cellular network cloud. Our roadsafety mobile app can be set to driver...

The availability of high bandwidth with low-latency communication in 5G mobile networks enables remote rendered real-time virtual reality (VR) applications. Remote rendering VR graphics a cloud removes the need for local personal computer and augments weak processing unit capacity stand-alone headsets. However, to prevent added network latency from ruining user experience, locally navigable viewport that is larger than field view HMD necessary. size required depends on latency: Longer...

Transit activities are a significant contributor to person's daily exposure pollutants. Currently obtaining accurate information about the personal of commuter is challenging as existing solutions either have coarse monitoring resolution that omits subtle variations in pollutant concentrations or laborious and costly use. We contribute by systematically analysing feasibility using wearable low-cost pollution sensors for capturing total commuters. Through extensive experiments carried out...

The growing popularity of mobile internet services, characterized by heavy network transmission, intensive computation and an always-on display, poses a great challenge to the battery lifetime devices. To manage power consumption in efficient way, it is essential understand how consumed at system level be able estimate during runtime. Although modeling each hardware component has been studied separately, there no general solution present combining them into system-level model. In this paper...

Energy consumption of mobile devices is a great concern and streaming applications are among the most power hungry ones. We evaluate energy saving potential shaping traffic into bursts before transmitting it over 3G LTE networks to smartphones. The idea that in between bursts, phone has sufficient time switch from high-power active state low-power states. investigate impact network parameters, namely inactivity timers discontinuous reception, on achievable savings radio access signaling...

High quality immersive Virtual Reality experience currently requires a PC setup with cable connected head mounted display, which is expensive and restricts user mobility. This paper presents CloudVR system for cloud accelerated interactive mobile VR. It designed to provide short rotation interaction latencies through panoramic rendering dynamic object placement. also includes optimizations reduce server-side computational load bandwidth requirements between the server client. Performance...

Multi-access edge computing has been proposed as a promising approach to localize the access of mobile clients network edges, therefore, reducing significantly traffic congestion on backhaul network. Due time-varying wireless channel condition, video caching at edges for dynamic adaptive streaming over HTTP (DASH) needs be efficiently handled alleviate high bandwidth demand and improve quality experience (QoE) end users. We investigate impact collaborative joint QoE data by proposing...

Live multimedia streaming from mobile devices is rapidly gaining popularity but little known about the QoE they provide. In this paper, we examine Periscope service. We first crawl service in order to understand its usage patterns. Then, study protocols used, typical quality of experience indicators, such as playback smoothness and latency, video quality, energy consumption Android application.

Cloud gaming is a relatively new paradigm in which the game rendered cloud and streamed to an end-user device through thin client. Latency key challenge for gaming. In order optimize end-to-end latency, it first necessary understand how latency builds up from mobile server. this paper we dissect delays occurring measure access various networks network conditions. We also perform Europe-wide measurement study find optimal server locations see number of affects delay. The results are compared...