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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
141

A Comparative Study of Centralised Protocols for Multiple Access

Boyd, John January 1982 (has links)
Note:
142

Performance analysis of HDLC protocol operating in asynchronous balanced mode

Kulkarni, Upendra M. 20 November 2012 (has links)
The objective of this work is to analyze the performance of HDLC Balanced Class of Procedures under saturated, full-duplex transmission on error prone links. This thesis extends work done by Bux et al. [8] by considering errors on both the links. Satellite links have long propogation delays compared to terrestrial links, and hence, have longer error recovery times. For such links, errors in acknowledgements have considerable impact on the throughput. In this analysis, the effect of errors in acknowledgements is taken in to consideration. An analytical approach is used to derive performance measures. The concept of "virtual transmission time" introduced by Bux et al is redefined to accommodate the effect of errors in acknowledgements and used in the analysis. Resulting throughput calculations show how various parameters, (e.g. transmission rate, propagation delay, error rate and packet size), interact and determine the performance. / Master of Science
143

A new methodology for designing communication protocols /

Lin, Huai-An January 1983 (has links)
No description available.
144

Automated validation of communication protocols /

Lu, Ching-sung January 1986 (has links)
No description available.
145

A dual-agent approach for securing routing protocols

Gaines, Brian Lee, January 2007 (has links)
Thesis (M.S.)--Mississippi State University. Department of Computer Science and Engineering. / Title from title screen. Includes bibliographical references.
146

Modeling the bandwidth sharing behavior of congestion controlled flows /

Li, Kang. January 2002 (has links)
Thesis (Ph. D.)--OGI School of Science & Engineering at OHSU, 2002. / Includes bibliographical references.
147

MAC and routing protocols for multi-hop cognitive radio networks

Kondareddy, Yogesh Reddy, Agrawal, Prathima, January 2008 (has links) (PDF)
Thesis (M.S.)--Auburn University, 2008. / Abstract. Vita. Includes bibliographical references (p. 42-44).
148

Query-localized route repair mechanism for ad-hoc on-demand distance vector routing algorithm

Jayakeerthy, Arunkumar Thippur, Lim, Alvin S., January 2009 (has links)
Thesis--Auburn University, 2009. / Abstract. Vita. Includes bibliographical references (p. 70-73).
149

The optimisation and performance evaluation of routing protocols in cognitive radio based wireless mesh networks

Kola, Lesiba Morries January 2017 (has links)
Thesis (MSc.) -- University of Limpopo, 2017 / The notion of ubiquitous computing, Internet of things (IoT), big data, cloud computing and other emerging technologies has brougt forward the innovative paradigms and incredible developments in wireless communication technologies. The Wireless Mesh Networks (WMNs) technology has recently emerged as the promising high speed wireless technology to provide the last mile broadband Internet access and deliver flexible and integrated wireless communication solutions. The WMNs has the potential to enable people living in rural, peri-urban areas and small businesses to interconnect their networks and share the affordable Internet connectivity. The recent multimedia applications developed, such as voice over Internet protocol (VoIP), online gaming, cloud storage, instant messaging applications, and video sharing applications require high speed communication media and networks. These applications have witnessed enormous growth in the recent decade and continue to enhance communication amongst the users. Hence, the WMNs must have adequate capacity to support high bandwidth and real-time and multimedia applications. While the wireless communications networks are dependent on the radio frequency (RF) spectrum, the traditional wireless technologies utilise the RF spectrum bands inefficiently, resulting in sporadic and underutilisation of the RF spectrum. This inefficient usage of RF spectrum calls for novel techniques to leverage the available RF spectrum amongst different players in the wireless communication arena. There have been developments on integration of the WMNs with cognitive ratios to allow unlicensed users of RF spectrum to operate in the licensed portions of spectrum bands. This integration will provide the required bandwidth to support the required high speed broadband communication infrastructure. In this dissertation, we focus our research on the routing layer in a multi-hop wireless network environment. We addressed the routing challenges in both the WMNs and the cognitive radio based wireless mesh networks (CR-WMNs). The primary focus was to identify the routing protocols most suitable for the dynamic WMN environment. Once identified, the routing protocol was then ported to the CR-WMN environment to evaluate its performance given all the dynamics of cognitive radio environment. vi We further proposed the routing protocol called the extended weighted cumulative expected transmission time (xWCETT) routing protocol for the CR-WMNs. The design of our proposed xWCETT routing protocol is based on the multi-radio multi-channel architecture as it gives the base framework matching the cognitive radio environment. The xWCETT integrates features from the Ad-hoc On-demand Distance Vector (AODV) routing protocol and the weighted cumulative expected transmission time (WCETT) routing metric. The xWCETT was implemented using the Cognitive Radio Cognitive Network (CRCN) patch ported in network simulator (NS2) to incorporate the shared and dynamic spectrum access features. We compared the performance of our proposed xWCETT routing protocol with the AODV, dynamic source routing (DSR), the optimised link source routing (OLSR), Destination Sequences Distance Vector (DSDV), and the CRCN-WCETT routing protocols. The extensive simulation and numerical results show that the proposed xWCETT protocol obtained on average, around 10% better performance results in the CR-WNNs as compared to its routing counterparts. The comparative analysis and evaluation was performed in terms of the average end-to-end latency, throughput, jitter, packet delivery ratio, as well as the normalised routing load. The performance results obtained indicates that the proposed xWCETT routing protocol is a promising routing solution for dynamic CR-WMNs environment. / National Research Foundation (NRF)
150

The performance of interval routing in general networks

謝紹康, Tse, Siu-hong, Savio. January 1997 (has links)
published_or_final_version / Computer Science / Doctoral / Doctor of Philosophy

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