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TCP (Transmission Control Protocol) is the dominant end to end transport protocol of the Internet, with a wide range of applications including Web, mail or peer to peer traffic. The TCP stack implements a “backlog queue” for new connections, which contains an entry for every client's connection setup received by the server. If the TCP handshake is not completed, the pending half-open connection stays...
This paper considers trajectory tracking control problem for internet-based teleoperation system under time varying communication delay. The design comprises delayed position signals with the local velocity and nonlinear adaptive control signals. Adaptive terms are used to learn and compensate uncertain parameters for the gravity loading vector of the master-slave device. Lyapunov-Krasovskii-like...
in this research, we propose a cost effective way to improve SOHO network performance by deploying web caching through virtual server, extensive experiments have been designed and conducted on real networks to measure the performance improvement, followed by quantitative analysis. We have found that certain applications are rendered useless due to large delay and low bandwidth environments. However,...
This paper describes a novel radio access channel adaptive technique designed for the Long Term Evolution (LTE) VoIP codecs. In previous 3GPP releases, the circuit switched Adaptive Multi Rate (AMR) voice codec has proven robust performance under different radio channel conditions. With the 3GPP Release 8 LTE standards, the circuit switched domain is cancelled, making LTE an all IP system and VoIP...
Network mobility support is a matter of great concern in mobile IPv6. The authors have proposed an innovative scheme for handling the delay due to handover. The proposed scheme aims to free Mobility Anchor Point (MAP) from overload, while guaranteeing low latency due to handoff.
With the booming development of C2C e-commerce platforms such as Taobao, and facing the employment pressure and the huge market demand, many college students have started to run on line business. College students set up online shop as a new approach for own a business, brings opportunities for contemporary college students, but at the same time, there are risks and straits. This article analyzes the...
Recently, there are some concerns in auction duration and bid arrivals in study of online auctions. In online auctions, seller selects duration, and the bid arrivals pattern is deemed to the indicator of bidding strategies and behaviors of bidders. The best known phenomenon in bid arrival is the late bidding, which describe the following bidding strategy used frequently by many bidders: bidders tends...
In the near future vehicular networks (VANETs) based on wireless technology will be part of our daily lives. VANETs enable vehicles that are not necessarily within the same transmission range to communicate with each other. They also allow vehicles to connect to Roadside Units (RSUs), which are connected to the Internet, forming a backbone mesh that offers the capability of communicating with each...
The use of internet services for time sensitive applications like voice and video, requires the forecasting quality of service. The TCP/IP differentiated services structure is given to achieve this target. However, network congestion control is limited and comes from the high priority. Some studies are still seeking a replacement techniques such as random early detection (RED) and its modification...
A Delay Tolerant Network (DTN) technique is used in this research for approaching the digital divide problem in Indonesia. In this research, a train system was chosen as infrastructures as DTN routers using Wi-Fi. Tens/hundreds/thousands of remote areas are passed through by a train, this makes Internet services proposed having low costs and appropriate for remote areas. The complete Internet services...
In IP-based wireless/mobile networks, mobility support is one of the most critical issues. Hierarchical Mobile IPv6 (HMIPv6) was proposed by Internet Engineering Task Force (IETF) to mitigate the high signaling overhead in Mobile IPv6 networks when mobile nodes (MNs) perform frequent hand-offs. Although the standardization process of the HMIPv6 specification has been almost completed in IETF, there...
The rapidly growing interest in untethered Internet connections, especially in terms of WLAN and 3G/4G mobile connections, calls for intelligent session management: a mobile device should be able to provide a reasonable end-user experience despite location changes, disconnection periods and, not least, handovers. As part of an effort to develop a SCTP-based session management framework that meets...
NetMagic is an open hardware platform facing the internet research and the teaching of network, which is widely applied to the new network technique. The dissertation took the study of technology of precise delay measurement based on NetMagic, then put foreword the idea of carrying timestamp by means of SMAC and brought it into force, moreover, we fulfill its corresponding measurement.
Multicast is one of the key technologies for supporting the multimedia networks services. Based on the concept of the distributed algorithm theory, this paper discusses a multimedia communication model and its corresponding data structure, and also simulates RPM algorithm by using forwarding table, the time line and data packet cache to discuss the algorithm QoS solution.
As the demand on the Internet bandwidth keeps increasing, all-optical network architectures emerge as a promising solution to high-speed telecommunication networks. However, the performance of optical routers/switches is sensitive to the statistics of Internet traffic due to their limited buffer size, which weakens the optical routers' capability of absorbing Internet traffic surges (known as burstiness),...
Peer-to-Peer-based Massively Multi-user Virtual Environments (P2P-MMVEs) often use coordinator peers to enhance the system's capabilities. The success of this approach depends on selecting suitable peers as coordinators. However, existing approaches either do not select coordinators based on their suitability or simply assume that techniques for such a selection exist. In this paper we argue that...
Infrastructure networks like Internet have some coverage gaps (e.g. rural areas) where no service connectivity is provided. Cellular networks could be used in alternative but they usually associate their services with a usage cost. Nowadays, the growing number of mobile devices equipped with a wireless interface and the end-user trend to shift toward wireless technology has opened new possibilities...
The bursty nature of losses over the Internet is constantly asking for effective solutions. Packet interleaving or time diversity allows to cope with loss burstiness, at the cost of an additional delay. In this work, after determining the loss burstiness degree of real networks, we implement a real interleaver (we called TimeD), and we tackle the problem of how to apply such a transmission schema...
Active Queue Management (AQM) and Explicit Congestion Notification (ECN) are two methods that attempt to alleviate the problems of FIFO queues and of packet drops for congestion indication respectively. Random Early Detection (RED) is the most popular AQM method. The Domain Naming System (DNS) protocol is a core Internet protocol with very high impact on user experience and overall network functionality...
The wireless world is migrating towards an era that will comprise wireless network infrastructure, as well as more local/temporary structures which, for instance, can be called Opportunistic Networks (ONs). ONs can comprise various terminals/devices, potentially organized in an infrastructure-less (ad-hoc) network mode, and be terminated at a set of access points of the infrastructure-based network...
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