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OSPF is one of the routing protocols which is the most widely used in internet and intranet today. The link-state algorithm in OSPF is based on the thought of local optimization, but in certain cases, routing algorithms based on local optimization might lead to a disadvantage which will remarkably depress global performances. A self-adaptive method based on the genetic algorithm is proposed, which...
We develop a protocol through which multipath enabled IP routers collectively engage in dynamic traffic engineering, to optimize performance in concert with legacy TCP congestion control. We build on recent theory which shows a globally optimum resource allocation across the TCP/IP layers can be achieved through control of rates and multipath routing fractions following a consistent congestion signal...
Intermittently Connected Wireless Networks (ICWN) or Delay/Disruption Tolerant Networks (DTN), have attracted attention from researchers because of their inherent characteristics, including long latency, low data rate, and intermittent connectivity. Extensive research has been conducted on ICWN, including the architecture, and routing. However, few researchers have investigated the performance of...
The separation between edge and core addresses has been proposed to address the scalability problem of the Internet routing system. One main challenge is to design an efficient mapping mechanism for the two address spaces. The layer structure is attractive because of its scalability and simple index mechanism, while existing layered mapping system lacks a clear structure study and faces serious deployment...
In this paper we propose a Packet-based measurement technique called Floating IP Active Measurement (FIPAM) that utilizes routing loop to measure Delay and Throughput in IP networks. Calculating these parameters in multi-provider and complex networks like Internet has became a challenge as most of current active measurement tools relying on ICMP and majority of today's networks block ICMP traffics...
Base on the QOS requirements of modern broadband networking, the paper presents our recent research on QOSPF in the on-demand computing over the traditional OSPF. The disadvantage in a distributed routing protocol under the QOS requirement is firstly discussed; then a new QOSPF which supports the QOS routing scheme is proposed. The advantage of new approach is demonstrated in the simulation of OSPF...
The well-known DTN divides an end-to-end communication path into hop-by-hop sessions and allows asynchronous message delivery over physically delayed or disrupted network environments. They have introduced bundling, an overlay network for delay tolerant networking in its architecture, which should be globally deployed and operated with tremendous effort. In this paper, we propose a new DTN architecture...
Multi-homing has been widely adopted in todaypsilas Internet. Several solutions have been proposed to support multi-homing, and Shim6 became most promising for IPv6-based next generation Internet. This paper proposes a Shim6-based dynamic path-selection mechanism, which selects path adaptively to earn higher bandwidth utilities and better performance. The experiment result shows that the new mechanism...
There is a growing need to support real-time applications over the Internet. Real-time interactive applications often have multiple quality-of-service (QoS) requirements which are application specific. Traditional provisioning of QoS in the Internet through IP routing - Intserv or Diffserv - faces many technical challenges, and is also deterred by the huge deployment issues. As an alternative, application...
This paper evaluates our work of Scalable Proxy Mobile IPv6 (SPMIPv6) in a Wireless Mesh Network (WMN), which is a promising solution for ubiquitous Internet access and a wide range of applications. The aspects of scalability and signaling cost are evaluated respectively: the scalability is evaluated by numerical analysis while the signaling cost with respect to delay is evaluated by a virtualization-based...
In this paper, we propose a new routing protocol named micro sensor routing protocol (MSRP) in IPv6 wireless sensor network. MSRP is implemented in network layer and can simplify significantly routing mechanism. Also, we simplify the routing message and remove source and destination nodes' sequence numbers and reduce route request (RREQ) ID length. Route reply (RREP) is created only by the destination...
Multi-interface mobile devices and multi-homed residential Internet connections are becoming commonplace. However, standard transport protocols TCP and SCTP are unable to take advantage of several available paths so that the application using a single transport connection would receive the aggregate bandwidth of all paths. Multihoming and advanced security features make the Host Identity Protocol...
We present an online distributed traffic engineering method for ISP networks with multi-path routing. The method is based on edge-to-edge aggregate flow control that balances load and makes the network congestion-free in real time, responding to actual traffic demands whether they are underload or overloaded. Moreover, it allows ISPs to apply various bandwidth-sharing policies to edge-to-edge flows,...
The active beacon based network monitoring tries to estimate the transfer delay of a link e by the difference of round-trip times from a beacon host to the two endpoints of e. For efficiency, we consider the problem of placing a minimum set of beacons to monitor all links of a given TCP/IP network e.g., the Internet. We propose an idea called L-beacon, i.e., a beacon can monitor only links within...
Simultaneous use of multiple disjoint Internet paths holds promise for exploiting available bandwidth as well as reacting more quickly to Internet path faults. While routing overlay networks have provided a method for accessing these paths, out-of-order packet delivery, which results from dispersion of packets across paths of varying latency, severely degrades the performance of highly optimized transport...
Explicit Multicast-Unicast (XCAST) is a complementary protocol of multicast that supports a very large number of small multicast sessions by specifies the destinations as the lust of unicast address explicitly. The usage of the IPv6 protocol creates new challenges such as the quality of service (QoS) mechanisms that are currently supported for the Internet Protocol version 6 (IPv6) in most implementations...
As the Internet steadily increases in importance, it is still based on a quite fragile routing design. From network operators perspective it is therefore crucial to detect end-to- end path performance due to routing outages early to either mitigate them directly or contact other entities to mitigate them. In this work we demonstrate the feasibility of a real-time tool for detecting degraded forwarding...
IEEE P1900.4 is an emerging standard for optimized radio resource utilization where cognitive radio technologies are used for efficient spectrum utilization. In this paper, we design and implement a cognitive wireless network system based on open documents of IEEE P1900.4, and evaluate its performance using UDP streaming and HTTP download. Our experiments show interesting results that total network...
Todaypsilas Internet architecture faces many challenges, especially the poor support for security and universal services. By analyzing the drawbacks of current TCP/IP protocol and related research schemes such as HIP and FARA, we propose a trustworthy universal network architecture model LISNA, which is based on locator/identity split. LISNA defines the network architecture by introducing a new kind...
Internet Relay Chat (IRC) is a critical application in military networks for maintaining situational awareness and conducting battle management at all echelons. But these networks are often subject to frequent disconnections, limited bandwidth, and long delays, especially when using satellite services and field radios. Such conditions are inhospitable to TCP, and thus the standard IRC protocol, which...
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