8 Hits in 7.9 sec

Thorough Analysis of IEEE 802.11 EDCA in Ring Topology Scenarios with Hidden and Exposed Nodes [chapter]

Katarzyna Kosek, Marek Natkaniec, Luca Vollero
2009 Lecture Notes in Computer Science  
In this paper the authors present a simulation study of five different ring networks with hidden and exposed nodes in which the IEEE 802.11 EDCA function is used as the MAC protocol.  ...  The presented analysis is crucial for understanding how the theoretically simple ring topology can be degraded by the presence of hidden and exposed nodes.  ...  The IEEE 802.11 [1] standard is one of the main actors in this scenario.  ... 
doi:10.1007/978-3-642-02454-2_47 fatcat:yymeuq5cs5gcllgyect5lxbeku

The Mobility Impact in IEEE 802.11p Infrastructureless Vehicular Networks

Waleed Alasmary, Weihua Zhuang
2010 2010 IEEE 72nd Vehicular Technology Conference - Fall  
Due to high speed of nodes and their frequent disconnections, it is difficult to design a MAC scheme in VANETs that satisfies the quality-of-service requirements in all networking scenarios.  ...  Moreover, a new unfairness problem according to node relative speed is identified for both broadcast and unicast scenarios.  ...  Acknowledgements I would like to express my deepest appreciation and gratitude to my supervisor Professor Weihua Zhuang for her guidance, support, and share of knowledge. Professor Zhuang can  ... 
doi:10.1109/vetecf.2010.5594542 dblp:conf/vtc/AlasmaryZ10 fatcat:elzdygz2gjfe3lr4cub6jpxpoa

An Analysis on Contemporary MAC Layer Protocols in Vehicular Networks: State-of-the-Art and Future Directions

Lopamudra Hota, Biraja Prasad Nayak, Arun Kumar, G. G. Md. Nawaz Ali, Peter Han Joo Chong
2021 Future Internet  
This paper gives an analysis of the objectives, mechanisms, advantages/disadvantages, and simulators used in specified protocols.  ...  This paper reviews the applications, characteristics, and challenges faced in the design of MAC protocols.  ...  The control packet of IEEE 802.11 was modified for handling hidden nodes, packet drop, and packet overloading on channel access.  ... 
doi:10.3390/fi13110287 fatcat:jrsgeyif6fbpng3whzlblhdrsq

Admission control schemes for 802.11-based multi-hop mobile ad hoc networks: a survey

Lajos Hanzo Ii., Rahim Tafazolli
2009 IEEE Communications Surveys and Tutorials  
The IEEE 802.11 standard has allowed affordable MANETs to be realised.  ...  However, providing Quality of Service (QoS) assurances to MANET applications is difficult due to the unreliable wireless channel, the lack of centralised control, contention for channel access and node  ...  SUMMARY This paper has firstly provided a thorough background on the field of admission control in IEEE 802.11-based multihop mobile ad hoc networks.  ... 
doi:10.1109/surv.2009.090406 fatcat:sln5ygaelnak7epddf3edtxete

Improving spatial reuse and MAC efficiency for future WLANs

Ioannis Selinis
That said, the IEEE 802.11ax amendment is currently focusing on addressing the challenges and improving the spectrum efficiency in dense deployments with hundreds of Access Points (APs) and Stations (STAs  ...  This is also one of the drivers for future IEEE 802.11 deployments, aiming not only to improve throughput per link, but the overall network performance in dense deployments.  ...  IEEE 802.11 Hidden/Exposed Node Problem The main shortcoming of IEEE 802.11 technology is that frame collisions may occur due to hidden nodes, while transmission opportunities are reduced due to exposed  ... 
doi:10.15126/thesis.00857313 fatcat:qdz25iu7mven5bjwr436c3uqli

Enhanced IEEE 802.11.p-Based MAC Protocols for Vehicular Ad hoc Networks

Yamen Nasrallah, Université D'Ottawa / University Of Ottawa, Université D'Ottawa / University Of Ottawa
The IEEE 802.11p protocol and its Enhanced Distributed Channel Access (EDCA) mechanism are the main focus of this thesis.  ...  These applications are of paramount importance in ITS, because their goal is to decrease the rate of vehicle collisions, and hence reduce the enormous costs associated with them.  ...  Access (EDCA) for Quality of Service (QoS)-based networks, and finally the IEEE 802.11p EDCA for vehicular networks.The authors of [118] have studied the performance of IEEE 802.11 in terms of reliability  ... 
doi:10.20381/ruor-20448 fatcat:32aivndlu5erpnxza76mczkry4

Aalborg Universitet Wireless Plug and Play Control Systems: Hardware, Networks, and Protocols Wireless Plug and Play Control Systems: Hardware, Networks, and Protocols Wireless Plug and Play Control Systems: Hardware, Networks, and Protocols

Soroush Meybodi, Afkhami, Soroush Meybodi, Thesis
2012 unpublished
Acknowlegement This research was supported by the Plug and Play Process Control (P 3 C) project. P 3 C was partly sponsored by the Danish Research Council for Technology and Science Production.  ...  It provides multiple channels and spatial reuse in sake of capacity increase. It handles automatic topology reconfiguration when nodes join and leave rings.  ...  A remarkable result is the Wireless Token Ring Protocol (WTRP) [10] . WTRP handles automatic topology reconfiguration when nodes join and leave rings.  ... 

Cross-layer performance analysis and adaptation for real-time wireless video streaming

Michael T. Loiacono
Unfortunately, today's state of the art local wireless technologies, such as IEEE 802.11, can be easily demonstrated to fail when subjected to the conditions associated with many of these real-world applications  ...  A particular focus is on the instability of current link adaptation algorithms in CSMA/CA based wireless systems under the congested scenarios associated with wireless transmission of multiple simultaneous  ...  There are no hidden/exposed nodes.  ... 
doi:10.7282/t3zs2w41 fatcat:z3cclc5uerabvpr2rhoffuurcq