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In wide area Layer 2 (L2) networks, there is a problem that broadcast packets for address resolution fill up link capacities. As a result, address resolution using Address Resolution Protocol (ARP), which uses broadcasts, cannot be used in wide area L2 networks. A conventional research has proposed an architecture using Distributed Hash Table (DHT) and ARP cache for reducing broadcasts. However, since...
Quality of experience that is perceived by customers directly affects reputation web service providers. Major web service providers locate intermediate computing resources between their contents servers and customers that assist quality enhancements of their service for their customers. For services using Internet of Things (IoT), there are strong interests in controlling intelligent IoT devices,...
The recent development of stream delivery technology made Internet broadcasting services popular. In live Internet broadcasting, broadcasters or viewers often add video or sound effects (we call this kind of live broadcasting, ‘different worlds broadcasting’). Therefore, we have proposed a distributed Internet live broadcasting system with video and audio effects. In this paper, we describe the implementation...
In the 5G era, it is expected that various services will be provided on network slices, which are virtualized network resources. Unlike the uniform service level provided in the current Internet, a network slice has to support multiple service levels for various types of services such as IP telephony, Internet-access and IoT/M2M. Because their requirements are quite different. IP telephony and Internet-access...
Over the past few years, network carriers have tended to consider their network function to be virtualized. It is possible to migrate virtualized network functions (VNFs) across datacenters for auto scaling and auto healing when traffic concentration or failure occurs. However, networks must provide a new network path corresponding to the new traffic flow generated by VNF migration. The problem is...
This paper describes a demo of OpenGeoBase, a NoSQL spatio-temporal distributed database that exploits Information Centric Network technology. We show its basic operations and two applications based on it. The first one is an Intelligent Transport System application making possible to discover public transport information (GTFS files) all over the world. The second application concerns a citizen reporting...
Many video streaming services employ the dynamic adaptive streaming over HTTP (DASH) technique to achieve better user's QoE. Named-data Networking (NDN) can bring many benefits to the video distribution with in-network cache and stateful forwarding. However, simply applying DASH technique to NDN causes problems. First, in-network cache may affect download time which makes bitrate adaptation a difficult...
Stateful programmable dataplanes are emerging as a disruptive technology and an enabler factor for network function virtualization in SDN environments. In this demo paper we show three real world use cases with stateful forwarding requirements to validate both the hardware and software implementations of the Open Packet Processor data plane.
In this article, the survivable routing problem on elastic optical networks (EONs) for single link-failure is studied. The failure-independent path-protecting p-cycles (FIPP p-cycles) protection scheme is used for request protection. Two heuristic algorithms are proposed to solve this problem.
NAT gateway is an important network system in today's IPv4 network when translating a private IPv4 address to a public address. However, traditional NAT system based on Linux Netfilter cannot achieve high network throughput to meet modern requirements such as data centers. To address this challenge, we improve the network performance of NAT system by three ways. First, we leverage DPDK to enable polling...
In this work, we mainly consider the synchronization problem of hybrid transmit-only nodes for slight modified IEEE 802.15.4 wireless sensor networks, which is called TRO 802.15.4. However, we should let the IEEE 802.15.4 networks to fit transmission cycle of transmit-only nodes in order to achieve the synchronization. The adaptive beacon interval shifting and resizing (ABISR) algorithm is then proposed...
This paper proposes a new measure to analyze the effects of countermeasures against cascading failures on telecommunications networks. Cascading failures affect wide areas and are caused by successive failures of equipment. The trigger is a small failure. Existing measures are reasonable from a bird's eye perspective. However, some pairs of nodes are very important from the perspective of national...
In this paper, we investigate the performance of an optical wireless communication (OWC) system subject to strong turbulence. To mitigate the mathematical complexity induced by the strong turbulence model, the amount of fading (AF) is introduced as a handy metric. It is then revealed that in a certain range of distances the AF decreases as the wavelength increases.
It is our great pleasure to welcome you all to the beautiful and exciting city Osaka for the 23rd IEEE International Symposium of Local and Metropolitan Networks (LANMAN 2017 - for the first time held in Japan).
We are pleased to welcome you to Osaka, Japan to attend IEEE LANMAN 2017, the 23rd IEEE International Symposium on Local and Metropolitan Area Networks. LANMAN began as a workshop focused on local networking technologies, but over more than two decades it has grown into a full fledged symposium covering a broad spectrum of networking issues. This year's technical program covers both wired and wireless...
The fabric architecture, which can realize massive packet forwarding even with small switches/routers, has been widely used as a network infrastructure in data centers in order to achieve high scalability and low cost. In carrier networks, large scale routers have been adapted as core routers due to the requirement of high density for accommodating a large number of users. Furthermore, the redundant...
In a high-speed backbone network, the failure of a network link may cause large data losses, so it is necessary to reserve spare network resources for faster recovery. The conventional protection methods to reserve backup routes do not consider the failure probability of each network link, so the same amount of network resources for the backup route are needed regardless of the failure probability...
This paper discusses the most appropriate transmission rate of IEEE 802.11 wireless LAN based on QoE for Web services. Since some QoS parameters have trade-off relationship between each other for the transmission rate, it is difficult to decide the appropriate value of the rate. Thus the authors clarify the relationship between QoE and QoS for Web services by the linear multiple regression analysis...
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