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In Smart Grid applications, we need to access end devices for monitoring and control over varieties of communication media (e.g., wireless, wired and power-line communications). The Internet Protocol is useful because it can integrate those heterogeneous media by IP over X architecture. In this paper, we focus on the integration of RS485, an optimal communication media for facility networking in buildings,...
This paper presents an experimental deployment of a multi-channel wireless backbone network (WBN) with an Open Flow-based traffic management framework. In a WBN, a set of APs, each of which uses a single and different channel, is connected by Ethernet and thus constructs a VAP handling multiple channels. To flexibly control traffic flow transmitted over multiple channels, we also implement a traffic...
Cloud computing infrastructures will likely be a key component of future Internet architectures, owing to the many advantages of server and network virtualization, especially considering the emerging Network Function Virtualization and Software Defined Networking technologies. The cloud infrastructure will then determine the performance of the networking environment. In this paper, such issue is investigated...
Data storage is one of today's fundamental services with companies, universities and research centers having the need of storing large amounts of data every day. Cloud storage services are emerging as strong alternative to local storage, allowing customers to save costs of buying and maintaining expensive hardware. Several solutions are available on the market, the most famous being Amazon S3. However...
Mobile devices with oodles of interfaces communicating concurrently through multi-homed access networks with a blend of wired and wireless transmission parameters need efficient data delivery. To suffice the need this paper investigates the impact of various retransmission policies viz. RTX-SAME, RTX-ASAP, RTX-LOSSRATE, RTX-SSTRESH, RTX-CWND, AllRtxSame, AllRtxAlt and FrSameRtoAlt on the throughput...
We propose a novel IP over AWG-STAR network with dynamically relocatable wavelength paths via communication node-side control. Experimental results demonstrate that the transmission capacity between communication nodes can be dynamically increased from 1 Gbps to 3 Gbps via adding looped-back wavelength paths to the internode in the proposed IP over AWG-STAR network we constructed experimentally.
A number of new routing protocols such as Traffic-Size Aware scheme (TSA), Dynamic Load-Aware Routing (DLAR), Load Balanced Ad Hoc Routing (LBAR), Receiver-oriented Load-balancing and Reliable Routing (RLRR)and Ring-based Energy AwareRouting (REAR) have been proposed recently to deal with load balancing in MANET. The primary objective of load balancing routing protocols is to divert traffic from routes...
A high-performance interconnection between a host processor and FPGA accelerators is in much demand. Among various interconnection methods, a PCIe bus is an attractive choice for loosely coupled accelerators. Because there is no standard host-FPGA communication library, FPGA developers have to write significant amounts of PCIe related code at both the FPGA side and the host processor side. A high-performance...
Heterogeneous networks (Hetnets) introduce an imbalance between downlink and uplink because the downlink transmit powers of the macro and pico eNodeBs can differ by as much as 16 dB. However, the user equipment(UE)'s maximum uplink transmit power is the same regardless of whether the UE is connected to the macro or the pico eNodeB. The uplink throughput performance depends both on the SINR that the...
This paper studies the performance of a RUB-based cognitive radio (CR) network, which coexists with a primary network with single primary transmitter (PT) and single primary user (PU). It is assumed that the PU can control the availability of each beam of the secondary base station (SBS) over a feedback link. The PU only needs to feed back to the SBS the index of the usable beams, which lead to the...
Requests in SIP (Session Initiation Protocol) usually pass through several servers. Since resources are considerably consumed to keep the state, state distribution problem is raised among several servers where the goal is to increase throughput, accessibility of servers and reduce overload. In this paper, the optimisation problem was formulated and implemented as a distributed algorithm on Asterisk...
Abstract-Named data networking architectures have emerged and attracted significant attention in recent years. Due to the name space being many orders of magnitude larger and more complex than IP address space, such architectures pose many significant challenges on design of routers and routing algorithms. IP forwarding algorithms are no longer applicable and cannot reach the satisfactory performance...
SMS4 is widely used in the Chinese National Standard for Wireless LAN WAPI (Wired Authentication and Privacy Infrastructure), and in WLAN WAPI, low-cost and efficient cryptography algorithm implementation is necessary and challenging. This paper proposes an ultra-compact IP core architecture, where the input data is processed in bytes. The proposed architecture further reduces its hardware consumption...
This study presents new channel utilization methods for a multi-channel wireless backbone network (WBN). To flexibly and efficiently use multiple channels, we exploit OpenFlow as a baseline function. In this paper, we propose a new framework to build an OpenFlow-based multi-channel WBN and then implement two new channel utilization methods: (i) a flow direction aware channel assignment method (DCA)...
The FPGA (Field Programmable Gate Array) technology is expected to play a key role in the development of Software Defined Radio (SDR) platforms. To this aim, leveraging the nascent High-Level Synthesis (HLS) tools, a design flow from high-level specifications to Register-Transfer Level (RTL) description can be thought. Based on such a flow, this paper describes the Design Space Exploration (DSE) that...
Network Address Translation (NAT) is the major solution to solve IP address shortage. However, NAT breaks the peer-to-peer communications and the Internet-oriented requests. In order to resolve this problem, lots of NAT traversal solutions such as Session Traversal Utilities for NAT (STUN), Universal Plug-and-Play (UPnP), Traversal Using Relay NAT (TURN), Application-Layer Gateway (ALG) and Interactive...
6in4 is the IPv4 to IPv6 migration technique that uses tunneling to encapsulate IPv6 packets over configured IPv4 communication links. This paper attempts to evaluate and compare performance parameters like Throughput, IP End-to-End Delay and Response Time of different applications running on the internet in IPv4, IPv6 and 6in4 manual tunneling environments. The applications that we are modeling are...
IP Next Generation (IPng) or IPv6 engineered by IETF is the successor of IPv4, the contemporary version of Internet Protocol. IPv6 is designed to solve the long term performance, reliability and scalability problems of IPv4. Although IPv6 implementation is yet to attain a maturity level, its success will ultimately depend on its implementation in a broader perspective. The IPv6 network migration is...
Today, usage of internet is growing exponentially. Congestion detection and avoidance algorithms are the major issues in TCP/IP. Earlier, packet drops are only source of congestion indication, but it leads to loss of throughput. Active Queue Management (AQM) can detect congestion before the queue overflows and informs the end hosts to respond congestion. It allows gateways to drop packets when average...
In traditional mobile IP, packet drops mainly occur due to mobile handover from one sub-network to another subnetwork and congested buffer overflow. Dynamic spectrum access and spectrum mobility in Cognitive Mobile IP introduces additional in-flight packet drops due to PU active in current CR transmission. Spectrum mobility packet drops in route optimization based CR mobile IP and smooth handover...
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