In a Multi-Processor System-on-Chip (MPSoC)-based embedded system with Network-on-chip (NoC) as the communication architecture, routing of the communication traffic among the Processing Elements (PEs) contributes sign...
详细信息
ISBN:
(纸本)9781424473212
In a Multi-Processor System-on-Chip (MPSoC)-based embedded system with Network-on-chip (NoC) as the communication architecture, routing of the communication traffic among the Processing Elements (PEs) contributes significantly to the overall latency, throughput and energy consumption. Design of an efficient routing algorithm for NoC requires a thorough understanding of the role of individual components of NoC. Simulation based studies are time-consuming and do not provide adequate insight into the design parameters for performance improvement. In this paper, we provide a framework for the analytical study of the NoC components and design an adaptive routing algorithm. Based on the traffic pattern of the communication traffic among PEs, we perform analytical studies based on network calculus and probabilistic analysis. Analytical study relates the design parameters with the worst case and average case latency and buffer requirements. Knowledge obtained from the analytical study is utilized for resource allocation of NoC, which further constitutes the design philosophy of the proposed Bounded Deflection Adaptive Routing (BDAR) algorithm. Our routing algorithm is deadlock-live lock free and efficiently reacts to link congestions. Experimental results based on simulations show that our routing algorithm performs significantly better than some existing static and dynamic routing in terms of link utilization, average and maximum end-to-end latency.
Google has recently released the video compression format VP8 to the open source community. This new compression format competes against the existing H.264 video standard developed by the ITU-T Video Coding Experts Gr...
详细信息
ISBN:
(纸本)9781450301657
Google has recently released the video compression format VP8 to the open source community. This new compression format competes against the existing H.264 video standard developed by the ITU-T Video Coding Experts Group (VCEG) in collaboration with the ISO/IEC Moving Picture Experts Group (MPEG). This paper compares these two video coding standards in terms of video bit rate-distortion (quality) performance and the video network traffic variability with different long video sequences. We find that VP8 presently does not fulfill its promise to achieve twice the quality at half the bandwidth compared to H.264. The rate-distortion (RD) performance of VP8 is rather slightly below the RD performance of H.264. On the positive side, in contrast to H.264, VP8 has no license fees.
The first cluster‐based public computing for Monte Carlo simulation in Indonesia is introduced. The system has been developed to enable public to perform Monte Carlo simulation on a parallel computer through an integ...
The first cluster‐based public computing for Monte Carlo simulation in Indonesia is introduced. The system has been developed to enable public to perform Monte Carlo simulation on a parallel computer through an integrated and user friendly dynamic web interface. The beta version, so called publicMC@BATAN, has been released and implemented for internal users at the National Nuclear energy Agency (BATAN). In this paper the concept and architecture of publicMC@BATAN are presented.
This paper presents a fuzzy control system to regulate the traffic flow approaching a single real intersection which consists of multiple lanes with turns, by adjusting time parameters and phases of traffic signals. T...
详细信息
This paper presents a fuzzy control system to regulate the traffic flow approaching a single real intersection which consists of multiple lanes with turns, by adjusting time parameters and phases of traffic signals. The lanes are cataloged into several groups controlled by individual traffic lights. These lights are further arranged into several light phases. A fuzzy controller was developed to control the time length of each light phase. Evolutionary algorithms were employed to generate the fuzzy logic rule base, using real statistical traffic data for the intersection. To simulate real car flows, new acceleration and deceleration movement models were developed to ensure safe driving by avoiding possible collision. A new fitness function that comprehensively characterizes car flow delay induced from signals was constructed to evaluate the performance of the fuzzy logic controller. Key performance criteria obtained using the fuzzy logic controller were compared with those obtained by the controller used by the Department of Main Roads, Queensland at the intersection.
A specification of a software system involves several aspects. Two essential aspects are convenience in specification and possibility for formal analysis. These aspects are, to some extent, exclusive. This paper descr...
详细信息
One important reason for the lack of acceptance of coronary arteriography techniques is the four hours (approximate) required for accurate 3D quantification of an arterial tree, thus making it prohibitive for the clin...
详细信息
暂无评论