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Software-Defined Network (SDN) allows a centralized controller to globally plan packets forwarding according to the operator's objectives. It may require more forwarding rules, and multi-path routing which is allowed in SDN to improve network utilization and throughput means more forwarding rules. However, the forwarding table in TCAM-based SDN switch is an important but limited resource. With this...
In modern semiconductor manufacturing facilities, metrology capacity is becoming limited because of the high equipment cost. This paper studies the problem of optimally assigning the capacity of multiple identical metrology tools in order to minimize the risk of defective wafers on heterogeneous production machines. We assume that the output of each production machine is assigned to only one metrology...
Packet classification—the matching of packet headers against a predefined rule set—is a crucial functionality of firewalls, intrusion detection systems, and SDN switches. Most existing classification algorithms trade setup time for classification speed—that is, the packet classification is fast, but the transformation of rules set into the corresponding search data structure takes a considerable amount...
Traffic signals are not only useful facilities to ensure the safety at an intersection, but also an important traffic management tool to improve the urban traffic network performance. Many traffic signal strategies have been presented to increase the throughput of an urban network and reduce the total delay. The difficulty is that a successful local optimization does not mean a better global performance...
Energy harvesting (EH) enabled relaying has attracted considerable attentions as an effective way to prolong the operation time of energy-constrained networks and extend coverage beside desired survivability and rate of transmission. In most existing literatures, the Harvest-Store-Use (HSU) model is utilized to describe the energy flow behavior of the EH system. However, the half-duplex (HD) constraint...
In modern communication networks, the security aspect is very important. Encryption algorithms are used to protect user communication from eavesdropping. Symmetric key algorithms must be used to achieve high speed secured communication. In this paper, we propose and evaluate the pipelined implementation of the Camellia encryption algorithm which has been approved for use by the ISO/IEC. Camellia algorithm...
Chaotic deployment of Wireless Local Area Networks (WLANs) in dense urban areas is one of the common issues of many Internet Service Providers (ISPs) and Wi-Fi users. It results in a substantial reduction of the throughput and impedes the balanced distribution of bandwidth among the users. Most of these networks are managed independently and there is no cooperation among them. Moreover, the conventional...
The increasing number of vehicles nowadays makes traffic congestion problems, inefficient traffic management cannot solve the jam at intersection. In this paper, we propose an intelligent traffic control scheme which uses the dynamic traffic information. An improved algorithm is given to choose phase matrices for short-term throughput maximization by allocate more durations of green-sign to those...
In visible light communication (VLC) network, which can provide high data rate information transmission, the multiple users will get access to network according to the carrier sense multiple access with collision avoidance (CSMA/CA) mechanism specified by IEEE 802.15.7 standard. In this paper, we propose to improve the channel access mechanism by increasing the channel utilization efficiency and achieving...
Offloading the LTE data services to unlicensed spectrum has been considered by 3GPP in Release 13, which is defined as LAA (Licensed-Assisted Access). Unlicensed band is attractive because of its large amount of spectrum resource. However, coexisting with wireless devices already existing in unlicensed spectrum (such as Wi-Fi) is a primary issue be solved effectively. This paper proposed two dynamic...
The proliferation of smartphones has unleashed a tremendous growth in wireless traffic, which is projected to continue for the foreseeable future, and put yet greater strain on the capacity of cellular networks. Deployment of pico base stations, reducing cell sizes and allowing more efficient reuse of limited radio spectrum, provides a powerful approach to cope with traffic hot spots and bring capacity...
Carrying out even the simplest performance benchmark requires considerable knowledge of statistics and computer systems, and painstakingly following many error-prone steps, which are distinct skill sets yet essential for getting statistically valid results. As a result, many performance measurements in peer-reviewed publications are flawed. Among many problems, they fall short in one or more of the...
In this paper a novel algorithm is proposed for the purpose of load balancing for SDN-based datacenters. Mininet emulator was utilized for the purpose of emulating the proposed system, the suggested algorithm was added to the POX controller. To evaluate our algorithm, we simulated a datacenter with a Fat-Tree topology (k=4). The algorithm was proposed to dynamically balance the load by means of re-routing...
HTTP-based adaptive streaming is today's predominating video delivery model over Internet. However, state-of-the-art bitrate adaptation algorithms are not suitable for low-latency adaptive video streaming due to a distinct lack of buffer dynamic stabilization at the client. A small buffer size lacks resilience to the buffer fluctuation imposed by the mismatch between the network throughput and the...
OpenFlow is currently the most commonly deployed Software Defined Network (SDN) technology. Some deployments designed with multi-controller OpenFlow have better scalability than standard OpenFlow. However, these deployments are not optimized for the Data Center Network (DCN), the cross-controller communication and routing may be inefficient. In this paper, we present the communication mechanism design...
In this paper, we present a big-data self organizing network (Bi-SON) framework aiming to optimize energy efficiency of ultra-dense small cells. Although small cell can enhance the capacity of cellular mobile networks, ultra-dense small cells suffer from severe interference and poor energy efficiency. The self organizing network (SON) can automatically manage and optimize the system performance. However,...
Many-Core System-on-Chips (MCSoCs) require efficient task migration approach in order to reach system performance objectives such as load balancing, communication optimization, fault tolerance, and temperature control. In this paper an efficient self-aware migration approach is introduced for NoC-based MCSoCs using a centralized feedback controller in order to control the congestion over the system...
The existing radio access network system is static and rigid which could not satisfy the communication requirements of the modern society — flexibility, mobility and intelligence. This paper studies the problems of virtualized resource allocation with multi-objective mapping in heterogeneous radio access network. First, a mathematical model of the multi-objective mapping for virtualized resources...
In case that a selfish terminal generates a large amount of traffic with high priority control of IEEE 802.11e, an access point (AP) and terminals in the AP cannot get transmission opportunities because of the media access control technique. In our previous work, we proposed traffic suppression method for the selfish terminal by cooperative controls between AP and terminals with considering the fairness...
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...
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