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The integration of both fronthaul and backhaul into a single transport network (namely, 5G-Crosshaul) is envisioned for the future 5G transport networks. This requires a fully integrated and unified management of the fronthaul and backhaul resources in a cost-efficient, scalable and flexible way through the deployment of an SDN/NFV control framework. This paper presents the designed 5G-Crosshaul architecture,...
Ultra-dense network (UDN) has been considered as one of the advanced technologies in 5G. With the increasing requirements on quality of service (QoS), large numbers of connections and very high area throughput density, various access points (APs) are deployed densely to provide desired services to user terminals. Then how to choose the optimal AP among neighbor candidate APs for accessing to the network...
To meet the future mobile user demand at a reduced cost, operators are looking at solutions such as C-RAN and different functional splits to decrease the cost of deploying and maintaining cell sites. The use of these technologies forces operators to manage two physically separated networks, one for backhaul and one for fronthaul. To solve this issue, transport networks for 5G will carry both fronthaul...
A transport network for 5G envisions integrating the fronthaul and backhaul segments (namely 5G-Crosshaul) into a single transport network. This requires a fully integrated and unified management of fronthaul and backhaul resources in a sharable, scalable and flexible way. The integrated and unified management of the transport network resources follows the Software Defined Networking (SDN) principles...
Recently, machine learning is widely used in applications and cloud services. And as the emerging field of machine learning, deep learning shows excellent ability in solving complex learning problems. To give users better experience, high performance implementations of deep learning applications seem very important. As a common means to accelerate algorithms, FPGA has high performance, low power consumption,...
Cloud radio access network based small cell network (Cloud-RAN SCN) has been promising to meet the ever-increasing capacity demand of the future mobile networks. Within this network, since large amount of small cells exist and users move frequently, the reselection of access small cell for users becomes a great challenge. To encounter this challenge, in this paper, we study the user association scheme...
Performance of software is increasingly restricted by the Memory Wall instead of CPU. Many studies focus on alleviating the DRAM latency by improving the row-buffer hit rate. But most of them treat the Kernel and User equally. Data used by Operating System and User applications spread in different rows of the same bank, leading to the contentions for the row-buffer when they access the bank successively...
Detailed analyses of the behaviors of operating system and applications are significant for taking full advantage of the precious hardware resources and improving performance. This paper focus on their DRAM access behaviors based on access proportion and row-buffer miss ratio (RBM). The access proportions of Kernel and User vary greatly in different stages throughout the lifetime of a process. Most...
This paper presents a software and hardware co-design flow for the coarse-grained systems on chip. It enables a multi-target design space exploration (MT-DSE) algorithm with multiple objectives such as chip area utilization, energy consumption, core efficiency, interconnection structure, application workload and speedup aware. With the help of the MT-DSE tool, the proposed design flow can supply a...
Providing reliable and quality of service (QoS) guarantee service is basic requirement for communication system. However, the intrinsic features of high-speed railway communication (HSRC), such as serious channel distortion, lack of perfect channel state information (CSI), severe Doppler effect, and sensitive to algorithm computation complexity, make this requirement hard to be met. In this paper,...
To compare the newly determined sequences against the subject sequences stored in the databases is a critical job in the bioinformatics. Fortunately, recent survey reports that the state-of-the-art aligners are already fast enough to handle the ultra amount of short sequence reads in the reasonable time. However, for aligning the long sequence reads (> 400bp) generated by the next generation sequencing...
In high-speed railway communication system, due to its intrinsic features, on-going services are more prone to drop than in common communication systems. Therefore, existing admission control (AC) schemes designed for common communication systems cannot be directly used, otherwise the service dropping probability (SDP) requirement cannot be guaranteed. In this paper, a cross-layer AC scheme is designed...
In order to protect the teenagers in online cyberspace, this paper presents SOBA, novel services-oriented internet browser architecture with distributed filtering mechanisms. SOBA is the first literature that introduces SOA concepts into the web browser design paradigm. It contains a server cluster, which employs URL filter functions to verify the URL access, while whitelists and validation results...
Classroom scheduling problem has long been proven to be a NP-Complete problem. This paper presents a novel services-oriented scheduling approach. Regarding each type of resource as a service, Smart Class originally introduces SOA into this problem to efficiently facilitate educational programmers with the design space exploration (DSE) and greedy algorithms based approach. Furthermore, the Smart Class...
This paper proposes a framework targeting the problem of task-level out-of-order (OoO) execution for heterogeneous systems. The framework consists of three layers: 1) Programming model; 2) OoO task scheduler; 3) Processing Elements. In order to uncover task-level parallelism automatically, renaming scheme is applied from instruction-level parallelism (ILP) to task-level parallelism (TLP). With the...
Bioinformatics is an emerging field with seemingly limitless possibilities for advances in numerous scientific research and applications domains. In this paper, we summaries the explosive cutting-edge acceleration engines for the emerging short read mapping problems. What's more, we propose a novel Cloud based web service solution to the short read mapping problem in DNA sequencing, which greatly...
This paper proposes a service-oriented reconfigurable co-processing architecture. The novelty of the architecture is to apply service-oriented concepts to system on chip (SoC) design paradigms and utilizes each processor and IP core as a function unit. Regarded as abstract instructions, tasks can be scheduled to IP core for parallel execution automatically. A uniform IP reconfiguration interface is...
This paper proposes a flexible programming model (FPM), which addresses the automatic parallel execution for functional tasks on heterogeneous multiprocessors. Guided by the simply annotated source codes, a front-end source to source compiler is provided to identify the parallel regions and generate the sources codes. A runtime middleware analyzes the inter-task data dependencies and schedules the...
Commodity operating systems execute device drivers in the kernel to achieve good performance. Unfortunately, this scheme is a significant cause of system failures. A study at Stanford University found Linux drivers have 3 to 7 times bug frequency as the rest of the operating systems. User-mode driver has long been considered as a good solution to solve this problem, but it suffers from either poor...
A novel frequency divider for Quantization Noise (QN) suppression in fractional-N phase-locked loops (PLLs) is presented in this paper. The proposed Multi-Modulus Frequency Divider (MMFD) utilizes a novel glitch-free divide-by-0.5/1/1.5/2 cell to reduce the frequency division step to 0.5 and the quantization noise induced by ΔΣ modulation is thus suppressed by additional 6dB. The circuit is designed...
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