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Voice over Internet protocol (VoIP) transmits voice communication in the packet-based switching network that requires packets to be delivered in a steady timing and with low latency, jitter, packet loss and sufficient bandwidth. Ethernet passive optical network (EPON) is one of the best future-oriented next-generation access network technologies, which can use the strict dynamic bandwidth allocation...
Wireless standardization activities such as Bluetooth V4.x have led to an explosive growth in innovative short-range wireless devices capable of providing various services to assist everyday life. Allowing Machine-to-Machine (M2M) communication between these M2M devices also enable new commercial service opportunities. Typically, short range M2M devices need another capable device such as a smartphone...
In this paper, we propose a parallel re-programming method that can reduce the time to complete software updates of in-vehicle electronic control units. The proposed method has been designed to operate in an in-vehicle gateway that integrates different types of in-vehicle networks including controller area network, FlexRay, and Ethernet to provide seamless communication between heterogeneous networks...
High performance computing (HPC) has witnessed a great boom of computing capability in recent years, however storage capacity fails to keep pace with that rapid growth, coun-teracting the benefits brought by higher computing power. Two dominating bottlenecks have been pointed out: firstly, Small-size IO requests fail to leverage the advantage of current distributed file systems and non-contiguous...
In this paper, a coverage analysis of Bluetooth Low Energy (BLE) and IEEE 802.11ah technologies for indoor scenarios is performed. This is of particular relevance when these technologies are deployed as part of capillary networks. The physical layer parameters of BLE and IEEE 802.11ah are modeled, together with a detailed and accurate indoor propagation scenario that accounts for wall losses, ray...
Mesh-Tree architecture is an enhanced architecture in NoC. In a three dimensional Mesh-tree topology every layer may be treated as mesh and trees are used to connect adjacent layers. This type of architecture is very efficient for broadcasting as well as high speed communication. Chip multiprocessors are becoming more widely utilized to efficiently use the increasing number of transistors available...
The further growth of billions of wirelessly connected devices requires a technology infrastructure that can handle a massive increase in storage, computing power and bandwidth, some of it available via cloud computing, to enable number crunching at very large scale and at high volume, low cost and low power. The IoT applications or ‘smart devices’ require the following technology enablers: ultra-low...
The further growth of billions of wirelessly connected devices requires a technology infrastructure that can handle a massive increase in storage, computing power and bandwidth, some of it available via cloud computing, to enable number crunching at very large scale and at high volume, low cost and low power. The IoT applications or ‘smart devices’ require the following technology enablers: ultra-low...
In two-tier heterogeneous cellular networks (HCN) where small cells are deployed overlaid with macro cells, base station (BS) association is one of the fundamental problems, which becomes even more challenging when the small cell BSs are connected to the gateways via imperfect backhaul links, e.g. using wireless technologies. In this paper, we first analyze the mean packet delay in radio access and...
The present study has its genesis in a longitudinal project aimed at determining long-term trends in jitter, packet loss and other observables on long-distance Internet paths [1]. The project also documents the challenges faced by users in remote locations with numerous nodes in various Pacific Island nations. This naturally poses the question how one might improve their connectivity. Bandwidth upgrades...
HTTP Adaptive Streaming (HAS) is a streaming video technique commonly employed over best-effort networks. However, it is characterized by some issues that harm its quality of experience (QoE) in cases of daily use. The main use case of the present investigation involves HAS clients competing for bandwidth inside the same home network. Based on related work, we found that one of the most convenient...
In this paper we present the design of an ultra low power analog four quadrant multiplier based on second generation current conveyor(CCII). The main attractive feature of the proposed multiplier is that it is based on dynamic threshold MOS transistor (DTMOS). Due to use of DTMOS, the power consumption of proposed multiplier has been reduced by 99.92 percentage as compared to its conventional version...
This paper presents frequency doublers with high output power for millimeter-wave applications. The circuits are fabricated using a 45nm SOI CMOS technology. A new circuit topology, combining a push-push doubler core with a cascaded stacked amplifier, has been implemented to increase the output power. The first doubler delivers 10.2 dBm peak power at 100 GHz output, with a 3-dB bandwidth from 88 to...
The real-time Image and signal processing applications, such as — vision, image synthesis, HDTV, signal processing, neural networks, require both computing and input/output power. The GFLOPS project is dedicated to the study of all the aspects concerning the design of such computers. Its aim is to develop a parallel architecture as well as its software environment to implement those applications efficiently...
The performance of wide area network (WAN) has a direct impact on user experience of cloud usage. In order to provide on-demand and performance-assured WAN connections, we design and implement a SDN-based system called Grace, which abstracts the underlying network resources into life-cycle network services to provide the predefined network performance via open APIs. With the advantages of this system,...
This paper demonstrates the operation of a Marchand balun prototype in a standard Silicon process that can switch its operation between 2 adjacent regions of the K band. Pass gate CMOS switches connect or disconnect additional lengths of line in the windings of the balun to change the balun's frequency response while maintaining its mixed mode performance. Digital control of the balun is enabled by...
In recent years, the prevalence of network devices such as smartphones, smart appliances, and various sensors has increased. As a result, interest in and demand for home networks has steadily increased. So, auto-configuration problems in home networks are very important and must be addressed, because some household members will not be familiar with the Information Technology (IT) devices and thus...
A 0.1–6 GHz fully differential common gate low noise amplifier (CGLNA) is proposed in this paper. High equivalent transconductance (gm) is realized with active transconductance-boosting with cross coupling capacitance. By introducing a positive feedback path in active transconductance-boosting circuit, this circuit increases freedom of transconductance, thus alleviates the trade-off between input...
When statistical multiplexing is used to provide connectivity to a number of client hosts through a high-delay link, the original TCP as well as TCP variants born to improve performance on those links often provide poor performance and sub-optimal QoS properties. To guarantee intra-protocol fairness, inter-protocol friendliness, low queues utilization and optimal throughput in mission-critical scenarios,...
The next-generation System z design introduces a new microprocessor chip (CP) and a system controller chip (SC) aimed at providing a substantial boost to maximum system capacity and performance compared to the previous zEC12 design in 32nm [1,2]. As shown in the die photo, the CP chip includes 8 high-frequency processor cores, 64MB of eDRAM L3 cache, interface IOs (“XBUS”) to connect to two other...
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