The recent trend is that the mobile internet service has been offered in the integration of various wireless networks. In such heterogeneous networks, vertical handover is more common and important handover technologies. But during vertical handover, standard TCP has experienced many problems such as multiple packet losses, the packet reordering, the under-utilization due to the drastic change ...

A packet switch with parallel switching planes is a parallel packet switch (PPS). A PPS can scale-up to larger aggregate capacity and faster line speeds than can a single plane. It is an open problem to design a PPS that is feasible to implement using multiple lower speed packet switches. Many solutions proposed previously are essentially impractical because of high communication complexity. In...

This paper deals with the state and parameter estimation problem for nonlinear networked control systems. In contrast to the general assumption of synchronized clocks, the different timescale of each sensor node is explicitly considered in the proposed method. This renders conventional synchronization algorithms redundant and thus frees up the network resources involved in the synchronization. ...

ProxyMobile IPv6 (PMIPv6) is proposed as a new network-based mobility protocol and it does not require MN’s involving in mobility management. MN can handover relatively faster in PMIPv6 than in Mobile IPv6 (MIPv6) because it actively uses link-layer attachment information and reduces themovement detection time, and eliminates duplicate address detection procedure. However, the current PMIPv6 ca...

The Tor network gives anonymity to Internet users by relaying their traffic through the world over a variety of routers. All traffic between any pair of routers, even if they represent circuits for different clients, are multiplexed over a single TCP connection. This results in interference across circuits during congestion control, packet dropping and packet reordering. This interference great...

In this paper, we analyze the dynamics of a sevenmonth real-time streaming experiment, which was conducted between a number of unicast dialup clients, connecting to the Internet through access points in more than 600 major U.S. cities, and a backbone video server. During the experiment, the clients streamed low-bitrate MPEG-4 video sequences from the server over paths with more than 5,000 disti...

A strong candidate for the future Internet core is optical packet-switched (OPS) network. In this paper, we study the impact of mechanisms as employed in OPS networks on the performance of upper layer Internet protocols represented by TCP and UDP. The mechanisms we investigate are packet aggregation, deflection routing, and ingress buffering. We show that packet aggregation in general improves ...

Recently, a network coding-based packet forwarding architecture COPE was proposed for multihop wireless networks to improve the throughput. Both simulation and testbed results verified COPE’s capability of enhancing throughput. However, COPE simply classifies all packets destined to the same nexthop into small-size or large-size virtual queues and then, to limit packet reordering, examines only...

The current 2.4 Linux network stack is based on a solid multi−processor−threaded implementation, known as softnet, which has been validated over the last 2 years. Linux is also used extensively in Internet packet forwarding services such as firewalls and routers etc. Linux has a very modular packet processing framework based on the (ingress and egress) Traffic Control Framework as well as the N...