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Embedded multimedia card (eMMC) is expected to replace secure digital (SD) card which is widely used for external memory and to be used widely in the embedded systems due to the improved performance and package. In this paper, we propose architecture of eMMC controller with multiple channels. It is connected to a host system using an AXI master interface for data transfer and an APB slave interface...
In order to reduce inter-core data communication load, increase effective bandwidth, reduce storage space and power consumption, various solutions have been suggested for on-chip networks. The aim of this study is to employ data compression for the packets delivered between cores over the inter-core on-chip network. The packets transferring the cache lines between cores are compressed before transmission...
The capability of relatively high-speed short-range communications of Autonomous Underwater Vehicles (AUVs) in underwater scenarios, for example, for communication between vehicles or when the AUV is approaching a docking station for downloading of data gathered during a survey mission, is becoming a relevant application in the context of sea exploration and mining. In this paper the analysis of the...
Exascale networks are expected to comprise a significant part of the total monetary cost and 10-20% of the power budget allocated to exascale systems. Yet, our understanding of current and emerging workloads on these networks is limited. Left ignored, this knowledge gap likely will translate into missed opportunities for (1) improved application performance and (2) decreased power and monetary costs...
Broadband pointwise contacting excitation of Lamb waves into sample materials remains a problem. We present a design of a broadband ultrasonic contacting needle transducer. A prototype was built and a transmit waveform was measured using a laser Doppler vibrometer. 1 MHz bandwidth is achieved at −18dB level while the center frequency was 210 kHz. This kind of transducer could permit quantifying the...
This paper proposes an efficient round-robin-based resource scheduling method performed over both the licensed and unlicensed bands in device-to-device-enabled cellular networks. Simulation results demonstrate that, in terms of the average transmission rate and the blocking ratio, the proposed method is superior to the conventional method.
This work investigates the immediate reservation (IR), advance reservation (AR), malleable reservation (MR) service provisioning in elastic optical networks (EONs).We design request scheduling and/or routing and spectrum allocation (RSA) algorithms for the IR/AR/MR request, respectively. Simulation results show that the proposed IR/AR/MR service provisioning package can reduce request blocking probability...
One main challenge in network virtualization is known as virtual network embedding(VNE). VNE is NP-hard and most algorithms in the literature are heuristic. This paper presents an exact algorithm based on the Integer Linear Programming(ILP). The exact algorithm aims to simultaneously minimize the cost of substrate network and average virtual link delay of mapped VNRs. Simulation results reveal that...
An ultra-broad bandwidth input/output structure is designed for 0.26 THz sheet beam traveling wave tube (SB-TWT). Adopting the multi-aperture coupler, this structure owns a larger electron tunnel and superior transmission characteristics. In order to maintain vacuum status and meet the operating bandwidth requirement, a new style pill-box window is presented. Employing the hybrid transmission modes,...
We propose a vertex-centric distributed resource orchestration algorithm for finding all feasible mappings of a service function chain in multi-domain networks. Simulation results show superior efficiency and scalability for computing large service function chain requests.
This paper proposes multi-dimensional resource mapping algorithms for inter-datacenter optical networks. Simulation results show that these proposed mapping algorithms can achieve better performance in blocking probability and revenue-to-cost ratio than the baseline algorithm.
This paper aims at minimizing the cost of transponder pool for dynamic Wavelength on Demand (WoD) services. Combinations of fixed-rate and variable-rate transponders, cost ratios, line rates of WoD requests, and arrival rates are investigated.
We propose to realize availability-aware service provisioning in EONs with FIPP-p-cycles and bandwidth-squeezed restoration. Simulation results show that the proposed schemes are more reliable and spectrum-efficient than the existing approach.
This paper focuses on the dynamic analysis of a novel piezo-based accelerometer with asymmetric gapped cantilever array. The accelerometer with asymmetric gapped cantilever, firstly published in Xu's work, exhibits significantly improved sensitivity. In this paper, in order to achieve wider dynamic response range, new structure of the accelerometer is proposed with asymmetric gapped cantilever array.
In this paper, a novel dual band pass Frequency Selective Surface (FSS) is presented. The FSS is a L9 shaped structure with dimensions 7 × 7mm2 and substrate thickness h = 0.762 mm. The proposed FSS aims to provide dual pass-bands in X-band. A stacked array FSS is also studied to broaden the transmission band of the structure. An equivalent circuit model is also given for analyzing the frequency characteristics...
Data Center is a multifunctional infrastructure that consists of thousands of compute servers and network devices. The fat-tree topology is widely adopted because of its efficiency and safety. However, the fat-tree topology can not completely meet the time-varying communication needs from physical and virtual machines. 60 GHz wireless technology was then incorporated into data centers for its high...
The interactions between Active Queue Management (AQM) algorithms and TCP have been extensively investigated in the last few years. However, majority of the studies are conducted without considering the consequences of different attacks on TCP flows. This research work aims to investigate the performance of TCP flows under Low-Rate Denial-of-Service (LDoS) attacks. In particular, we have performed...
In the coexistence scenario of NB-IoT and LTE system, several factors affect the evaluating indicators of system performance. Considering the narrow bandwidth character of NB-IoT system, the simulation result would be over-optimistic if the evaluation method about ACLR and ACS in coexistence study of LTE system is still used. In this paper, a new evaluation method about ACLR and ACS is proposed aimed...
UWB based on chirp waveforms has the advantages of low cost, low power consumption and high processing gain. A multiple access UWB system based on multi-chirp waveforms is proposed[ Sponsored by Tianjin science and technology planning project(No:13ZCZDSY20100)], which enables the system to gain merits of both IR-UWB and OFDM-UWB. System performance for multi-user UWB using multi-chirp waveforms is...
It is well-known that the spurious fast retransmission and timeout widely exist in the course of vertical handover when a mobile node (MN) moves from a longer transmission delay network into a shorter one. Some solutions for the problems have been discussed in a lot of literatures for non-Cognitive Radio (non-CR) scenarios. One of them, bicasting is the main method to improve the transmission performance...
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