Search results for: M. Atiquzzaman
chapter
Typical transmission control protocol (TCP) based web agents in mobile wireless environment have several deficiencies, such as performance degradation, head-of-line blocking, and unsupported mobility. The Stream Control Transmission Protocol (SCTP) is a new transport protocol, which provides multi-streaming and multi-homing features. SCTP extensions for dynamic address reconfiguration will support...
chapter
Lecture Notes in Computer Science > Embedded and Ubiquitous Computing – EUC 2005 > Network Protocol, Security and Fault-Tolerance > 1099-1106
We have presented an optimal algorithm for minimal cost loop problem (MCLP), which consists of finding a set of minimum cost loops rooted at a source node. In the MCLP, the objective function is to minimize the total link cost. The proposed algorithm is composed of two phases: in the first phase, it generates feasible paths to satisfy the traffic capacity constraint, and finds the exact solution through...
chapter
Lecture Notes in Computer Science > Networking and Mobile Computing > Session 6: Multicast I > 268-275
This study deals with the topology discovery for the capacitated minimum spanning tree network. The problem is composed of finding the best way to link nodes to a source node and, in graph-theoretical terms, it is to determine a minimal spanning tree with a capacity constraint. In this paper, a heuristic algorithm with two phases is presented. Computational complexity analysis and simulation confirm...
chapter
Lecture Notes in Computer Science > Computer and Information Sciences - ISCIS 2005 > Computer Networks > 13-22
The stream control transmission protocol (SCTP) is a new transport protocol, which provides multi-streaming and multi-homing features. Especially, recent SCTP extensions with dynamic address reconfiguration supports transport layer mobility. We address web agent framework supporting seamless transport layer mobility in the wired and wireless environment. Our proposed framework for mobile web agent...
chapter
Saratoga is a protocol for fast file transfers across dedicated links in private networks, using small amounts of feedback for loss recovery. It is in use to download large amounts of imaging data from remote-sensing satellites, where the link environment is highly asymmetric and up-links are constrained. However, Saratoga lacks a rate-control mechanism to allow fair share with co-existing flows for...
chapter
To support IP-mobility of networks in motion, IETF proposed Network Mobility (NEMO) protocol that uses various signaling messages to ensure connectivity of the mobile nodes with the Internet. However, there has been no comprehensive cost analysis of mobility protocol entities that considers all possible costs. In this paper, we have developed analytical models to estimate total costs of key mobility...
chapter
Internet mobility protocols are designed to support handover between different wireless networks. Many of them, such as Mobile IPv6, suffer problems such as high handover latency, high packet overhead, high packet loss during handoff, requirement for infrastructure change, etc. To solve these problems, SEamless MObility using SHIM6 (SEMO6), a multihoming based mobility protocol framework for host...
chapter
Mobile Ad hoc networks (MANETs) are composed of a collection of independent nodes usually connected by low bandwidth Radio Frequency (RF) links which are challenging for transmitting video and high bandwidth applications for rescue workers in emergency situations. Earlier we proposed a routing protocol, called AODVH to use for high bandwidth communication for search and rescue operations in a disaster...
chapter
Hybrid Free Space Optics (FSO)/Radio Frequency (RF) communication systems have emerged as a way to improve network performance by providing enhanced availability and reliability. In an effort to mitigate individual drawbacks in the optical link during adverse weather conditions, network traffic flows simultaneously between channels. Based on the Shannon-Hartley theorem, channel capacity is dependent,...
chapter
The availability of Channel State Information (CSI) at the receiver side of a Free Space Optical (FSO) link is required for optimal detection and diversity combining. Consequently, providing instantaneous CSI knowledge introduces challenges to receiver design and an increase in estimation error and bandwidth waste. In this work we investigate two selection-combining diversity schemes and their achieved...
chapter
2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE > 2280 - 2285
IETF proposed Hierarchical Mobile IPv6 (HMIPv6) to support host mobility and mobility management involves signaling costs at various mobility entities of the network. Widespread use of IP-enabled mobile devices have resulted in increase in number of mobile users and the signaling cost on underlying mobility entities have increased significantly, which will result in their performance degradation....
chapter
The traffic characteristics in recent years have changed considerably having more video and audio traffic with critical real-time constraints. This situation is compounded by the increased number of mobile nodes communicating over Internet. Due to such high data traffic, the access routers are often overloaded with packets with different priority. The access routers have to act quickly enough to avoid...
chapter
To facilitate mobile computing, mobility protocols have been proposed and mobility management involves signaling costs. Widespread use of IP-enabled mobile devices have resulted in increase in number of mobile users in the network and the signaling cost on underlying mobility entities have increased significantly, which will result in performance degradation of the mobility protocols. However, there...
chapter
Among the route optimization schemes in NEtwork MObility (NEMO), the prefix delegation-based schemes perform better than other schemes. Since the prefix delegation-based schemes are designed for communication between a mobile network and a wired network, they lack evaluation for the case of intra mobile network communication involving MIPv6 incapable hosts in a mobile network. We evaluate prefix delegation-based...
chapter
Ad hoc networks are characterized by nodes which are usually connected by low data rate Radio Frequency (RF) links when compared to optical links. RF links make it challenging for transmitting video and running high bandwidth applications over ad hoc networks. The objective of this paper is to develop a novel routing protocol for Ad hoc networks consisting of hybrid nodes using high bandwidth Free...
chapter
The purpose of devising a hybrid FSO/RF (Free Space Optics/Radio Frequency) system is to allow for reconfiguration, which enables an increased availability and reliability grade of the communication system. In the event of loss of an active FSO link, path reconfiguration ensures utilization of the FSO path queued next in priority. Thus, communication can be maintained in the optical domain with increased...
article
IEEE Communications Surveys & Tutorials > 2010 > 12 > 1 > 24 - 38
Network mobility (NEMO) handles mobility of a set of mobile nodes in an aggregate way using one or more mobile routers. NEMO introduces several advantages, such as reduced signaling, increased manageability, reduced power consumption and conservation of bandwidth when compared to individual host mobility. NEMO Basic Support Protocol (BSP), the IETF standard for NEMO, suffers from a number of limitations,...
chapter
Node mobility has a direct impact on the performance evaluation of various network mobility protocols. Unfortunately, most of the analysis on mobility protocols used Random Waypoint mobility model which does not represent real-world movement patterns of mobile nodes. In this paper, we have analyzed City Section mobility model, a realistic mobility model for the movement in the city streets. We have...
chapter
In network layer based mobility protocols, such as mobile IP, the correspondent node is not aware of handovers and therefore continues to send data at the same rate as before the handover which may exhibit network unfriendliness, especially when the capacities of the two subnets differ significantly. On the contrary, transport layer based mobility protocols, such as SIGMA, do not show such phenomena...
chapter
2009 IEEE/AIAA 28th Digital Avionics Systems Conference > 4.A.6-1 - 4.A.6-8
Communication is vital in order to coordinate rescue and clean up efforts should an event eliminate the most common infrastructure, such a cell tower and phone lines, in a region. One of the most effective ways to set up an alternative communication system without relying on traditional methods would be to attach a temporary system to airships floating above the region. However, an inherent problem...
