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Content Delivery Networks (CDNs) are able to improve user-oriented application performance through caching and anycast routing or DNS-based user mapping mechanism. With the fact that BGP is widely used for inter autonomous system (AS) routing for CDNs, there is a middle mile bottleneck problem, which cause by the nature limitation of BGP. To solve this problem, we propose an SDN-based tunnel multi-path...
Also named as the path-finding algorithm, the routing algorithm aims at finding a good way between the source point and destination point under some constraint conditions (the path “cost” is the lowest). Specifying part of necessary nodes by the algorithm, the node constraint routing algorithm finds the “good” path and must pass the necessary nodes without the loop; otherwise, the path is invalid...
A placer without considering modern technology and region constraints could generate solutions with irresolvable detailed-routing violations or even illegal solutions. This paper presents a high-quality placement algorithm to satisfy technology and region constraints and optimize detailed-routing routability with three major techniques: (1) a clustering algorithm followed by two-round quadratic placement...
A cyclic mobile social network (MSN) is a new type of delay tolerant network, in which mobile users periodically move around, and contact each other through their carried short-distance communication devices. In this paper, we introduce utility-based routing into cyclic MSNs, and propose a deadline-sensitive utility-based routing model. If a message is successfully delivered to its destination before...
This paper presents a modified multi-fingers structure for power transistors in the integrated chips. To evaluate the performance of structure, three open loop synchronous buck converter with different structures of power transistors, conventional multi-fingers structure, modified multifingers structure and hybrid waffle structure are fabricated in 0.16μm CMOS process. Compared to conventional multi-fingers...
In order to solve the problem that the coverage area of ZigBee tree network is restricted by the depth, so that new nodes can not join the network and become a orphan, this paper introduces a project of expanding network coverage area. In this project, through the manual of the button, we can choose a qualified end device to convert to the router configuration, then the device as a router receives...
To solve the problem that the cluster heads consume a lot of energy in the cluster tree network, a new method which can balance energy consumption and improve the energy utilization ratio is proposed in this paper. This method employs the existed network address resource to select the reserved cluster head. By this method, the convert of network structure which caused by changing cluster head is also...
In recent years, many IPv6 networks have been deployed, and the security issues of which arouse more and more public concern. It is commonly believed that IPv6 provides greater security against random-scanning worms by virtue of a very large address space. However, a clever worm can develop a more intelligent scanning strategy to find target hosts. This paper presents a worm which uses the p2p-based...
Existing studies on the design of routing protocols for wireless ad hoc networks mainly focused on energy efficiency. However, in many real-time applications such as target tracking and bush fire surveillance, latency is an important concern, and little attention has been paid to it in the design of routing protocols for such applications to meet the specified Quality of Service (QoS) requirements...
Recently, the significantly increased IPv6 address length has posed a greater challenge on wire-speed router for packet classification (PC). Most conventional IPv4-based PC algorithms are no longer suitable for IPv6 PC. The performance and capacity of many IPv6 algorithms and classification devices depend upon properties of the IPv6 classifiers. However, there are no publicly available IPv6 real classifiers...
In agile all-optical networks, time division multiplexing in the optical domain is applied on wavelength channels to further divide each wavelength channel into subchannels in order to enable bandwidth virtualization. By introducing intelligent control, agile all-optical networks can serve dynamic and flexible bandwidth on demand. Metro networks with a ring topology are considered, and the protection...
In this paper, we solve two problems in a 300-mm wafer fabrication facility (fab). Firstly, for the lot scheduling problem, we propose a multi-objective genetic programming based rule generator (MOGPRG) to evolve useful dispatching rules, which can provide near-optimal lot schedules concerning multiple objectives. Secondly, the overhead hoist transports (OHT) routing problem is considered. As the...
The wireless ad hoc networks (WANET) is an open system that is constituted by fix or mobile nodes. In WANET, each node can be a router or a host. Considering that most nodes may use battery as its energy, it is necessary to improve on energy-saving method. Based on the MAODV protocol, we bring forward a new method called PPEF that uses both hops and energy consumption level of each node together for...
In emerging agile all-optical networks, the next generation time division multiplexing technique in the optical domain is implemented on top of wavelength-division multiplexing to increase channel utilization and to support dynamic bandwidth demands. However, the corresponding dynamic routing, wavelength and timeslot assignment (DRWTA) problem has not yet been well addressed with respect to appropriately...
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