Media Access Technique for Cluster-Based Vehicular Ad Hoc Networks

Rawashdeh, Zaydoun Yahya; Mahmud, Syed Masud

doi:10.1109/vetecf.2008.448

Cited by 30 publications

(12 citation statements)

References 4 publications

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“…Our similarity function, shown below in (5), is a combination of the negative Euclidean distance between node positions now and the negative Euclidean distance between node positions in the future. This is a simple way to consider both node position and node mobility in cluster creation.…”

Section: Affinity Propagationmentioning

confidence: 99%

Mobility-Based Clustering in VANETs Using Affinity Propagation

Shea

Hassanabadi

Valaee

2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

166

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Abstract-The recent research in cluster-based MAC and routing schemes for Vehicle Ad Hoc Networks (VANETs) motivates the necessity for a stable VANET clustering algorithm. Due to the highly mobile nature of VANETs, mobility must play an integral role in cluster formation. We present a novel, mobility-based clustering scheme for Vehicle Ad hoc Networks, which utilizes the Affinity Propagation algorithm in a distributed manner. The proposed algorithm considers typical vehicular mobility during cluster formation to garner clusters with high stability. Simulation results confirm the superior performance of the proposed algorithm, when compared to other accepted mobilitybased clustering techniques, in terms of average cluster head duration, average cluster member duration, and average rate of cluster head change.

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Section: Affinity Propagationmentioning

confidence: 99%

Mobility-Based Clustering in VANETs Using Affinity Propagation

Shea

Hassanabadi

Valaee

2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

166

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“…A similar idea is proposed in [25], but using only one DSRC transceiver in each vehicle. The proposed protocol uses a clusterhead for the intra-cluster communication and …”

Section: Virtual Grouping Mac 251 Cluster-based Macmentioning

confidence: 99%

Mobility impact in IEEE 802.11p infrastructureless vehicular networks

2012

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Vehicular ad hoc networks (VANETs) are an extreme case of mobile ad hoc networks (MANETs). High speed and frequent network topology changes are the main characteristics of vehicular networks. These characteristics lead to special issues and challenges in the network design, especially at the medium access control (MAC) layer. 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.In this thesis, we provide a comprehensive evaluation of the mobility impact on the IEEE 802.11p MAC performance. The study evaluates basic performance metrics such as packet delivery ratio, throughput, and delay, as well as the impact of mobility factors. The study also presents a relation between the mobility factors and the respective medium access behavior. Moreover, a new unfairness problem according to node relative speed is identified for both broadcast and unicast scenarios. To achieve better performance, we propose two dynamic contention window mechanisms to alleviate network performance degradation due to high mobility. Extensive simulation results show the significant impact of mobility on the IEEE 802.11p MAC performance, an identification of a new unfairness problem in the vehicle-to-vehicle (V2V) communications, and the effectiveness of the proposed MAC schemes.iii 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 be considered as a role model for the professional academic supervisor. She gave me the opportunity to choose the topic of my Master's research, and provided me with invaluable suggestions and advice. She always inspired me when discussing research problems. In addition to her solid knowledge that enriched my research, she was always available, professional, helpful, and extremely nice. Her extraordinary commitment to the excellence of research made the opportunity to work with her a true reward of my Master's research.

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“…However, this technique needs a complex synchronization procedure (e.g., central point to distribute resources fairly among nodes). Some of the timebased methods use distributed TDMA for media access (Yu & Biswas, 2007), while most of the others use centralized structure like the clustering techniques (Su & Zhang, 2007) (Rawashdeh & Mahmud, 2008). Some of the time-based approaches used in VANET are summarized as follows:…”

Section: Time-based Mac Schemesmentioning

confidence: 99%

“…The authors also redefined the functionality of all DSRC channels such that each channel is used for a specific task. In (Rawashdeh & Mahmud, 2008), the authors proposed a hybrid media access technique for cluster-based vehicular networks. The proposed method uses scheduled-based approach (TDMA) for intra-cluster communications and managements, and contention-based approach for inter-cluster communications, respectively.…”

Section: Time-based Mac Schemesmentioning

confidence: 99%