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Dissertations / Theses on the topic 'MAC protocols'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Balakrishnan, Manikanden, Subah Ramakrishnan, and Hong Huang. "ENERGY-AWARE SENSOR MAC PROTOCOLS." International Foundation for Telemetering, 2004. http://hdl.handle.net/10150/605793.

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International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California<br>Sensor network applications typically require continuous monitoring of physical phenomena for extended periods of time under severe energy resource constraints. Accordingly, design considerations for sensor Media Access Control (MAC) protocols depart significantly from those of traditional wireless MAC protocols that largely ignore the energy factor. In this paper, we reexamine the design space of wireless sensor MAC protocols and modify IEEE 802.11 Distributed Coordination

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2

Kulkarni, Santosh B. Umphress David A. Agrawal Prathima. "Synergy MAC a cooperative MAC protocol /." Auburn, Ala, 2009. http://hdl.handle.net/10415/1609.

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3

Shah, Munam Ali. "A novel MAC protocol for cognitive radio networks." Thesis, University of Bedfordshire, 2013. http://hdl.handle.net/10547/301090.

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The scarcity of bandwidth in the radio spectrum has become more vital since the demand for wireless applications has increased. Most of the spectrum bands have been allocated although many studies have shown that these bands are significantly underutilized most of the time. The problem of unavailability of spectrum bands and the inefficiency in their utilization have been smartly addressed by the cognitive radio (CR) technology which is an opportunistic network that senses the environment, observes the network changes, and then uses knowledge gained from the prior interaction with the network

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4

Katila, Charles Jumaa. "Mac protocols for linear wireless (sensor) networks." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7626/.

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Wireless sensor networks (WSNs) consist of a large number of sensor nodes, characterized by low power constraint, limited transmission range and limited computational capabilities [1][2].The cost of these devices is constantly decreasing, making it possible to use a large number of sensor devices in a wide array of commercial, environmental, military, and healthcare fields. Some of these applications involve placing the sensors evenly spaced on a straight line for example in roads, bridges, tunnels, water catchments and water pipelines, city drainages, oil and gas pipelines etc., making a sp

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5

Alhakami, Wajdi. "Secure MAC protocols for cognitive radio networks." Thesis, University of Bedfordshire, 2016. http://hdl.handle.net/10547/621831.

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With the rapid increase in wireless devices, an effective improvement in the demand of efficient spectrum utilisation for gaining better connectivity is needed. Cognitive Radio (CR) is an emerging technology that exploits the inefficient utilisation of the unused spectrum dynamically. Since spectrum sharing is responsible for coordinating channels’ access for Cognitive Users (CUs), the Common Control Channel (CCC) is one of the existing methods used to exchange the control information between CUs. However, the unique characteristics and parameters of Cognitive Radio Networks (CRNs) present sev

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6

Koh, Kenneth Johannesen. "Analysis of Key Industrial WSN MAC Protocols." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for telematikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-27346.

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This paper looks at two MAC protocols for wireless sensor networksfor use in industrial applications developed at the Ubicom Lab, at theUniversity of Ulsan. A theoretical comparison of the MAC protocolsare performed to understand more about the benefits and downsidesto both of them, and experimental scenarios to validate the theoreticalanalysis are suggested. Theoretical analysis suggests that BigMAC hasan advantage in environments with high interference and frequent linkbreaks, while I-MAC has an advantage when the network topology isstable.

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7

Ge, Ye. "QoS provisioning for IEEE 802.11 MAC protocols." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1095441321.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xiii, 97 p.; also includes graphics (some col.). Includes bibliographical references (p. 94-97).

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8

Kondareddy, Yogesh Reddy Agrawal Prathima. "MAC and routing protocols for multi-hop cognitive radio networks." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Electrical_and_Computer_Engineering/Thesis/Kondareddy_Yogesh_18.pdf.

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9

Masrub, Abdullah Ashur. "Cognitive MAC protocols for mobile ad-hoc networks." Thesis, Brunel University, 2013. http://bura.brunel.ac.uk/handle/2438/7621.

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The term of Cognitive Radio (CR) used to indicate that spectrum radio could be accessed dynamically and opportunistically by unlicensed users. In CR Networks, Interference between nodes, hidden terminal problem, and spectrum sensing errors are big issues to be widely discussed in the research field nowadays. To improve the performance of such kind of networks, this thesis proposes Cognitive Medium Access Control (MAC) protocols for Mobile Ad-Hoc Networks (MANETs). From the concept of CR, this thesis has been able to develop a cognitive MAC framework in which a cognitive process consisting of c

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10

Antonopoulos, Angelos. "Network coding-aided MAC protocols for cooperative wireless networks." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/97094.

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The introduction of third generation (3G) technologies has caused a vast proliferation of wireless devices and networks, generating an increasing demand for high level Quality of Service (QoS). The wide spread of mobile applications has further reinforced the user need for communication, motivating at the same time the concepts of user cooperation and data dissemination. However, this trend towards continuous exchange of information and ubiquitous connectivity is inherently restricted by the energy-greedy functionalities of high-end devices. These limitations, along with the pressure exerted o

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11

Kalfas, Georgios. "Medium-transparent MAC protocols for converged optical wireless networks." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/406358.

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In order to address the explosive demand for high-capacity and omnipresent wireless access, modern cell-based wireless networks are slowly adopting two major solution roadmaps. The first is the employment of small-cell formations in order to increase the overall spectral efficiency, whereas the second is the employment of higher frequency bands, such as the mm-wave 60GHz band, that offers vast amounts of bandwidth. Depending on the specific application, the above solutions inevitably require the installation and operational management of large amounts of Base Stations (BSs) or Access Points (A

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12

Kubbar, Osama. "Design and performance evaluation of broadband wireless MAC protocols." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0011/NQ52827.pdf.

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13

Orell, Mattias. "Performance Evaluation of MAC protocols in Wireless Sensor Networks." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-32103.

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Wireless Sensor Networks have limited resources in terms of processing capability, battery power, and channel bandwidth, which makes them both lightweight and cheap. These limitations and also advantages come with some problems regarding network lifetime and fault tolerance, as the nodes share the same wireless media with WiFi, Bluetooth and microwaves. The protocol that affects this the most is the Medium Access Control (MAC) protocol running on the MAC layer. The traditional MAC layer in wireless networking is responsible for accessing the wireless medium and decides when and how data is sen

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14

Shu, Feng. "Analysis and optimization of MAC protocols for wireless networks /." Connect to thesis, 2007. http://eprints.unimelb.edu.au/archive/00003857.

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15

Al-Mefleh, Haithem Abdel-Razaq Ahmad. "Design and analysis of MAC protocols for wireless networks." [Ames, Iowa : Iowa State University], 2009.

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16

Mehta, Anil. "MAC AND APPLICATION LAYER PROTOCOLS FOR HIGH PERFORMANCE NETWORKING." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/dissertations/396.

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High-performance networking (HPN) is of significance today in order to enable next-generation applications using wired and wireless networks. Some of the examples of HPN include low-latency industrial sensing, monitoring and automation using Wireless Sensor Networks (WSNs). HPN however requires protocol optimization at many layers of the open system interface (OSI) network model in order to meet the stringent performance constraints of the given applications. Furthermore, these protocols need to be impervious to denial of service (DoS) and distributed DoS (DDoS) attacks. Some of the key perfor

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17

Majeed, Adnan. "TARMAC timing analysis resilient MAC protocol /." Diss., Online access via UMI:, 2007.

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18

Sarraf, Anooshiravan Hashemzadeh. "Asymmetric traffic load modelling for local area networks." Thesis, Manchester Metropolitan University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319239.

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19

Sala, Dolors. "Design and evaluation of MAC protocols for hybrid fiber/coaxial systems." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/13268.

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20

Augustin, Angelika. "Effective Power Consumption in MAC Protocols for Wireless Sensor Networks." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-286.

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<p>Wireless sensor networks offer easy implementation, flexibility and mobility of hand held </p><p>devices. Sensors consist of an internal power source, which is the great limitation for </p><p>the life time and the usage of sensor networks. To increase the life time, sensors should </p><p>stay in energy saving sleep mode as long as possible, because in sleep mode the radio is </p><p>either shut down or working with less energy. Better energy handling is implemented in </p><p>different power saving mechanism of common Medium Access Control protocols, which are </p><p>evaluated and analyzed an

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21

Toor, Yasser. "Design and optimization of broadcast and MAC protocols for VANETs." Paris 6, 2009. http://www.theses.fr/2009PA066697.

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Les réseaux véhiculaires (Vehicular Ad Hoc Networks ou VANETs) ont pris une grande importance au cours des dernières annés car on espère qu'ils pourront sauver des vies sur nos routes et offrir également de nouvelles opportunités commerciales. Même s'ils font l'objet d'intenses recherches et d'efforts de normalisation, plusieurs problèmes restent encore posés pour la conception des protocoles et des applications. Ces problèmes sont surtout dus aux caractéristiques particulières de ces réseaux : grande mobilité, haute vitesse relative, topologie variable et faible bande passante utilisable. Les

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22

Kollipara, Sharmila. "Evaluation and Comparison of MAC Protocols in Wireless Sensor Networks." Cleveland State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=csu1292953246.

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23

YIN, JUN. "MODELING AND OPTIMIZATION OF WIRELESS LOCAL AREA NETWORKS MAC PROTOCOLS." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1129928618.

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24

Velempini, Mthulisi. "Improving the scalability of MAC protocols in wireless mesh network." Doctoral thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/12215.

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Includes abstract.<br>Includes bibliographical references (leaves 128-133).<br>Efficient utilization of multi-channels is critical for the success of multi-channel MACprotocols. Unfortunately, current multi-channel MAC protocols are not efficient in the utilization of the multiple channels. The poor utilization of the available channels is also affected by the following: channel coordination, channel selection, and channel scheduling strategies, which do not lend themselves to scalability and the efficient use of the multiple channels. Good channel coordination and selection techniques are the

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25

Guennoun, Mouhcine. "Semi-Persistent Medium Access Control Protocols for Wireless Sensor Networks." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31769.

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Wireless Sensor Networks (WSNs) are dense clusters of sensor nodes, made up of small, intelligent, resource-constrained wireless devices that are deployed to monitor a specific phenomenon in a certain field. The sensor nodes can be constrained by limited power supply, memory capacity and/or processing capabilities, which means that the design of WSNs requires all algorithms and protocols to be lightweight and efficient, and use as little power as possible. The Medium Access Control (MAC) protocol in WSNs, defined by the IEEE 802.15.4 standard, employs the Carrier Sense Multiple Access with Col

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26

Ramachandran, Iyappan. "Joint PHY-MAC optimization for energy-constrained wireless networks /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/5968.

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27

Chang, Ching-Hung. "Dynamic bandwidth allocation MAC protocols for gigabit-capable passive optical networks." Thesis, University of Hertfordshire, 2008. http://hdl.handle.net/2299/2452.

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The research initiatives addressed in this thesis are geared towards improving the performance of passive optical networks (PONs) through the development of advanced dynamic bandwidth allocation (DBA) protocols. In particular, the aim of the research undertaken is to enhance the quality of service (QoS) offered by standard PONs by means of providing subscribers with service level agreement (SLA) to fulfil applications and associated bandwidth requirements on demand. To accomplish the research objectives, a novel service and bandwidth focused DBA protocol is developed for standard time division

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28

Noureddine, Hadi. "Position-based routing and MAC protocols for wireless ad-hoc networks." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/5834.

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This thesis presents the Forecasting Routing Technique (FORTEL), a routing protocol for Mobile Ad-Hoc Networks (MANETs) based on the nodes' Location Information. FORTEL stores the nodes' location information in the Location Table (LT) in order to construct routes between the source and the destination nodes. FORTEL follows the source routing strategy, which has rarely been applied in position-based routing. According to the source routing strategy, the end-to-end route is attached to the packet, therefore, the processing cost, in regards to the intermediate nodes that simply relay the packet a

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29

Choobkar, Sabrieh. "Prioritised and adaptive preamble sampling MAC protocols for Wireless Sensor Networks." Thesis, King's College London (University of London), 2015. http://kclpure.kcl.ac.uk/portal/en/theses/prioritised-and-adaptive-preamble-sampling-mac-protocols-forwireless-sensor-networks(91c33b32-e838-4217-b38a-b44c413fc533).html.

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A Wireless Sensor Network (WSN) is composed of many sensor nodes that gather measurements from the environment and transmit them to a central unit for analysis. Sensor nodes are small devices with limited energy resources. Therefore, energy is a crucial concept in a WSN. Optimised design of medium access control (MAC) protocol results in efficient energy consumption while improves delay, lifetime and reliability of data delivery. Our research considers a network with a contention-based MAC protocol. The contributions of this thesis are divided into two parts: • We analyse the concept of priori

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30

Frances, Galiana Alfredo. "PERFORMANCE ANALYSIS OF DUTY-CYCLE MAC PROTOCOLS IN WIRELESS SENSOR NETWORKS." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-22146.

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This thesis studies the behavior of the S-MAC protocol in a Wireless Sensor Networks (WSN). The main limitation of the WSN is the lifetime of the battery, because normally it is short and it is not possible to change it all the time. For this reason, the battery consumption and the delay have to be low. This reduction of delay can be done with the medium access control (MAC) protocol duty-cycle in the sensors. For decrease the energy consumption, sensors must be set in an appropriate way following some rules, such as: how many packets the sensor send at the same time, how much time the sensor

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31

CHEN, YUNLI. "PERFORMANCE ANALYSIS AND ENHANCEMENT OF MAC PROTOCOLS FOR IEEE 802.11 WLANS." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1098856121.

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32

Mohammed, Alalelddin Fuad Yousif. "Studying Media Access andControl Protocols." Thesis, KTH, Kommunikationssystem, CoS, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91193.

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This thesis project’s goal is to enable undergraduate students to gain insight into media access and control protocols based upon carrying out laboratory experiments. The educational goal is to de-mystifying radio and other link and physical layer communication technologies as the students can follow packets from the higher layers down through the physical layer and back up again. The thesis fills the gap between the existing documentation for the Universal Software Radio Peripheral (USRP) resources and the knowledge of undergraduate students. This was necessary because the existing document i

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33

Al-Mousa, Yamin Samir. "MAC/routing design for under water sensor networks /." Online version of thesis, 2007. http://hdl.handle.net/1850/4496.

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34

Raymond, David Richard. "Denial-of-Sleep Vulnerabilities and Defenses in Wireless Sensor Network MAC Protocols." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/26629.

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As wireless sensor platforms become less expensive and more powerful, the promise of their wide-spread use for everything from health monitoring to military sensing continues to increase. Like other networks, sensor networks are vulnerable to malicious attack; however, the hardware simplicity of these devices makes defense mechanisms designed for traditional networks infeasible. This work explores the denial-of-sleep attack, in which a sensor nodeâ s power supply is targeted. Attacks of this type can reduce sensor lifetime from years to days and can have a devastating impact on a sensor netwo

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35

Ueda, Tetsuro. "MAC and routing protocols for wireless ad hoc networks using directional antenna." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/136020.

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36

Nasrallah, Yamen. "Enhanced IEEE 802.11.p-Based MAC Protocols for Vehicular Ad hoc Networks." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36168.

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The Intelligent Transportation System (ITS) is a cooperative system that relies on reliable and robust communication schemes among vehicles and between vehicles and their surroundings. The main objective of the ITS is to ensure the safety of vehicle drivers and pedestrians. It provides an efficient and reliable transportation system that enhances traffic management, reduces congestion time, enables smooth traffic re-routing, and avoids economic losses. An essential part of the ITS is the Vehicular Ad hoc Network (VANET). VANET enables the setup of Vehicle-to-Vehicle (V2V) as well as Vehicle-t

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37

Khanafer, Mounib. "Design of Efficient MAC Protocols for IEEE 802.15.4-based Wireless Sensor Networks." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22816.

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Wireless Sensor Networks (WSNs) have enticed a strong attention in the research community due to the broad range of applications and services they support. WSNs are composed of intelligent sensor nodes that have the capabilities to monitor different types of environmental phenomena or critical activities. Sensor nodes operate under stringent requirements of scarce power resources, limited storage capacities, limited processing capabilities, and hostile environmental surroundings. However, conserving sensor nodes’ power resources is the top priority requirement in the design of a WSN as it has

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38

Huang, Feiyi. "Random access MAC protocols and system monitoring methodology in wireless mesh networks." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1444200/.

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As an extension of wireless Ad Hoc 1 and sensor 2 networks, wireless mesh networks (WMN) 3 have recently been developed as a key solution to provide high-quality multimedia services and applications, such as voice, data and video, over wireless personal area networks (WPAN) 4, wireless local area network (WXAN) 5 and wireless metropolitan area network (WMAN) 6. A WMN usually has a hierarchical network infrastructure with backbone and access networks operated in both Ad Hoc and centralized modes with self-organization and self-configuration capabilities. Along with flexibilities, WMN brings sev

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39

Kao, Enoch Chia-chi. "A dynamic random channel reservation for MAC protocols in multimedia wireless networks." Thesis, University of Canterbury. Computer Science and Software Engineering, 2001. http://hdl.handle.net/10092/9614.

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Medium Access Control (MAC) plays a vital role in wireless networks. With the increasing popularity of multimedia services, MAC protocols of wireless networks are required to satisfy a variety of Quality of Service (QoS) requirements, including short delays. One of techniques for satisfying such requirements is based on assignment of transmission rights on demand. Following such a protocol, bandwidth is assigned to mobile terminals when they have something to transmit. The base station has absolute control of the bandwidth, including assignment of different priorities to different classes of u

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40

Jafarian, Javad. "Modelling and analysis of wireless MAC protocols with applications to vehicular networks." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/modelling-and-analysis-of-wireless-mac-protocols-with-applications-to-vehicular-networks(3695e637-12eb-4fde-9c31-08b3b46e8f55).html.

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The popularity of the wireless networks is so great that we will soon reach the point where most of the devices work based on that, but new challenges in wireless channel access will be created with these increasingly widespread wireless communications. Multi-channel CSMA protocols have been designed to enhance the throughput of the next generation wireless networks compared to single-channel protocols. However, their performance analysis still needs careful considerations. In this thesis, a set of techniques are proposed to model and analyse the CSMA protocols in terms of channel sensing and

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41

Thind, Balvinder Kaur. "A receiver-initiated MAC protocol with enhancements for multi-hop wireless networks." Online access for everyone, 2004. http://www.dissertations.wsu.edu/Thesis/Spring2004/b%5Fthind%5F050404.pdf.

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42

Michálek, Tomáš. "Vývoj MAC protokolu pro bezdrátové senzorové sítě." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-242186.

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The work focuses on introduction to the topic of wireless sensor networks and brings readers the various aspects of problem solving in these networks. Work is closely focused on the energy performance when communicating between devices on a network and discusses the causes of excessive energy consumption. It also addresses the mechanisms for saving energy and is also engaged today protocols that its contribution to proposing solutions to problems. The author had also proposes an adapted protocol, based on lessons learned from previous theoretical sources.

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43

Al-Janabi, Thair. "Design of energy efficient protocols-based optimisation algorithms for IoT networks." Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/17121.

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The increased globalisation of information and communication technologies has transformed the world into the internet of things (IoT), which is accomplished within the resources of wireless sensor networks (WSNs). Therefore, the future IoT networks will consist of high density of connected nodes that suffer from resource limitation, especially the energy one, and distribute randomly in a harsh and large-scale areas. Accordingly, the contributions in this thesis are focused on the development of energy efficient design protocols based on optimisation algorithms, with consideration of the resour

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44

Khan, Rana Azeem M. [Verfasser]. "MAC protocols for cooperative diversity in wireless sensor networks / Rana Azeem Muhammad Khan." Paderborn : Universitätsbibliothek, 2014. http://d-nb.info/1061069044/34.

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45

Chen, Xiaohang. "Low-Power MAC design for M2M Communications in Cellular Networks: Protocols and Algorithms." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-128360.

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Machine-to-Machine Communication (M2M) is the communications between wireless devices without human interventions. As a fundamental enabler of Internet of Things, M2M is growing fast and implemented in many areas. The number of M2M devices is expected to be extremely large in the future. In most cases they are battery driven and positioned in broad areas so that it would be costly to frequently replace or charge their batteries. To save the cost of maintaining M2M systems in the long term, energy consumption needs to be minimized so that battery lives of M2M devices can be maximized, which mot

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46

Valero, Marco. "Implementing Energy-Saving Improvements to the IEEE 802.15.4 MAC Protocol." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/cs_theses/62.

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IEEE 802.15.4 is a standard designed for low data rate wireless personal area networks (WPANs) intended to provide connectivity to mobile devices. Such devices present considerable storage, energy, and communication constraints. However, they can be used in a variety of applications like home/office automation, environmental control and more. In order to extend the lifetime of the WPAN, we propose some changes to the standard including modifications to the Superframe Guaranteed Time Slot (GTS) distribution which can be optimized to reduce energy consumption. We implemented the proposed improve

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47

Aït-Aoudia, Fayçal. "Energy harvesting wireless sensor networks leveraging wake-up receivers : energy managers and MAC protocols." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S115/document.

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Les Réseaux de Capteurs Sans Fils (RCSFs) sont composés d'une multitude de nœuds, chacun étant capable de réaliser des mesures (température, pression, etc) et de communiquer par radio fréquence. Ces réseaux forment une pierre angulaire de l'Internet des Objets, en étant au cœur de nombreuses applications, par exemple de domotique ou d'agriculture de précision. La limite d'utilisation des RCSFs provient souvent de leurs durées de vie restreintes, les rendant peu intéressants pour des applications nécessitants de longues périodes de fonctionnement en autonomie. En effet, les RCSFs traditionnels

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48

Cano, Bastidas Cristina. "A low power listening with wake up after transmissions MAC protocol for WSNs." Doctoral thesis, Universitat Pompeu Fabra, 2011. http://hdl.handle.net/10803/22717.

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In the last few years Wireless Sensor Networks (WSNs) have become an interesting field of research mainly due to the challenges and constraints of their design and the broad range of potential applications they can provide. One of the most important constraints is the limited energy resources of the sensor nodes that directly influences the design of the Medium Access Control (MAC) layer, as it is the responsible of controlling the transceiver that is the most consuming component of a sensor node. In this thesis the limitations of preamble sampling, one of the most well-known MAC protocols for

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49

Qureshi, Faisal Fayyaz. "A reliable and energy efficient cognitive radio multichannel MAC protocol for ad-hoc networks." Thesis, University of Bedfordshire, 2014. http://hdl.handle.net/10547/337026.

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Recent research has shown that several spectrum bands are mostly underutilised. To resolve the issue of underutilisation of spectrum bands across the networks, the concept of Cognitive Radio (CR) technology was envisaged. The CR technology allows Secondary Users (SUs) to acquire opportunistic access to large parts of the underutilised spectrum bands on wireless networks. In CR networks, SUs may scan and identify the vacant channels in the wireless spectrum bands and then dynamically tune their receivers to identify vacant channels and transmitters, and commence communication among themselves w

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Sabir, Essaïd. "MAC protocols design and a cross-layered QoS framework for next generation wireless networks." Phd thesis, Université d'Avignon, 2010. http://tel.archives-ouvertes.fr/tel-00544071.

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Abstract:

Ce manuscrit est centré sur la conception, l'amélioration et l'évaluation des protocoles des couches RESEAU, MAC et PHY. En particulier, nous nous focalisons sur la conception de nouveaux protocoles distribués pour une utilisation optimale/améliorée des ressources radio disponibles. Par ailleurs, nous caractérisons les performances des réseaux ad hoc à accès aléatoire au canal en utilisant des paramètres de plusieurs couches avec aptitude de transfert d'information (data forwarding). La majeure partie de nos analyses se base sur le concept d'interaction entre les couches OSI (cross-layer). En

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