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OAR: An Opportunistic Auto-Rate Media Access Protocol for Ad Hoc Networks

B. Sadeghi, V. Kanodia, A. Sabharwal, E. Knightly
2005 Wireless networks  
In this paper, we introduce the Opportunistic Auto Rate (OAR) protocol to better exploit durations of high-quality channels conditions.  ...  The IEEE 802.11 wireless media access standard supports multiple data rates at the physical layer.  ...  Conclusions In this paper, we introduced OAR, an opportunistic media access protocol for multi-rate ad hoc networks.  ... 
doi:10.1007/s11276-004-4745-x fatcat:r2ijjihyjjfslakx2arnuosbhq

QoSperformance of IEEE 802.11 in MAC and PHY layer using Enhanced OAR Algorithm

Hussain Basha Pathan, Suresh Varma P, Satya Rajesh K
2017 Indian Journal of Science and Technology  
Methods/ Statistical Analysis: The performance of QoS of IEEE 802.11 in MAC and PHY layer are studied using an enhanced opportunistic auto rate protocol e-OAR.The proposed algorithm uses distributed protocol  ...  For the competent use of a multi-rate physical layer, an e-OAR might be used which is very close to MAC layer.  ...  Conclusion In this research paper, an enhanced Opportunistic Auto Rate (OAR) is developed to adjust multi-hop Ad hoc networks in a directive for enhancing the throughput in multi-rate links.  ... 
doi:10.17485/ijst/2017/v10i9/98054 fatcat:4odyrbiekzgaxc5tthffj7oroq

Opportunistic media access control and rate adaptation for wireless ad hoc networks

Jianfeng Wang, Hongqiang Zhai, Yuguang Fang, M.C. Yuang
2004 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577)  
In this paper, we present the Opportunistic packet Scheduling and Auto Rate (OSAR) protocol to exploit the channel variations.  ...  The key mechanisms of OSAR are channel aware media access, rate adaptation and packet bursting.  ...  To exploit the mulituser diversity in the CSMA/CA based wireless ad hoc networks, in this paper, we present a new MAC protocol, i.e., the opportunistic packet scheduling and auto rate (OSAR) protocol.  ... 
doi:10.1109/icc.2004.1312471 dblp:conf/icc/WangZFY04 fatcat:6rqodnf6gvb3zjboczeuda3qea

Opportunistic media sccess for multirate ad hoc networks

B. Sadeghi, V. Kanodia, A. Sabharwal, E. Knightly
2002 Proceedings of the 8th annual international conference on Mobile computing and networking - MobiCom '02  
In this paper, we introduce the Opportunistic Auto Rate (OAR) protocol to better exploit durations of high-quality channels conditions.  ...  The IEEE 802.11 wireless media access standard supports multiple data rates at the physical layer.  ...  CONCLUSIONS In this paper, we introduced OAR, an opportunistic media access protocol for multi-rate ad hoc networks.  ... 
doi:10.1145/570645.570650 dblp:conf/mobicom/SadeghiKSK02 fatcat:7ahjflxeqfgf5fjujv3gvvng5y

Cooperative and opportunistic transmission for wireless ad hoc networks

Qian Zhang, Qing Chen, Fan Yang, Xuemin Shen, Zhisheng Niu
2007 IEEE Network  
Cooperative and Opportunistic Transmission for Wireless Ad Hoc Networks 1 Without explicit mention, host and node are exchangeable in this article.  ...  Considering the co-channel interference and lack of a central controller in ad hoc networks, the "cooperative and opportunistic transmission" concept is promoted.  ...  Almost during the same timeframe, two schemes that exploit time and space-varying channels for wireless ad hoc networks are proposed: opportunistic media access and rate adaptation protocol (OSAR) [7]  ... 
doi:10.1109/mnet.2007.314533 fatcat:tpbqvhfinba2dm33pm4hcimm4y

AdHoc Probe: end-to-end capacity probing in wireless ad hoc networks

Ling-Jyh Chen, Tony Sun, Guang Yang, M. Y. Sanadidi, Mario Gerla
2007 Wireless networks  
In this paper, we present AdHoc Probe, a packet-pair based technique, to estimate end-to-end path capacity in ad hoc wireless networks.  ...  We apply AdHoc Probe to path capacity estimation in auto rate wireless networks with variable displacement and interference; and, in remote wireless networks across the Internet.  ...  ACKNOWLEDGEMENT We are grateful to the editors and anonymous reviewers for their insightful comments. This material is  ... 
doi:10.1007/s11276-007-0047-4 fatcat:6ixxoqbdc5anxk5d6xsg4yzl3m

QoS-Aware Cooperative and Opportunistic Scheduling Exploiting Multiuser Diversity for Rate-Adaptive Ad Hoc Networks

Qing Chen, Qian Zhang, Zhisheng Niu
2008 IEEE Transactions on Vehicular Technology  
In literature, many opportunistic scheduling policies for ad hoc networks have been proposed, in which each transmitter independently schedules the transmission.  ...  In wireless ad hoc networks, nodes may have packets destined to multiple neighboring nodes.  ...  Finally, the opportunistic scheduling for ad hoc networks can be formulated as max Q i∈N E f i (µ i (t)) I i∈Q(t) s.t.  ... 
doi:10.1109/tvt.2007.905310 fatcat:6r37z4kvtjg6vgbolzgebbnifu

Cross-Layer Design for QoS Support in Multihop Wireless Networks

Qian Zhang, Ya-Qin Zhang
2008 Proceedings of the IEEE  
In [51] , the authors further proposed a new scheme, opportunistic medium access and auto rate (OMAR), to efficiently utilize the shared medium in 802.11-based ad hoc networks by taking advantage of diversity  ...  In [45] , the authors proposed an opportunistic auto rate (OAR) scheme in which a flow transmits with higher data rate and more back-to-back packets when its channel condition is better.  ... 
doi:10.1109/jproc.2007.909930 fatcat:c4uk437gunft5k7h2jckobgxa4

Graph Theoretical Analysis of Opportunistic Scheduling Policy for Wireless Ad Hoc Networks

Qing Chen, Fei Ye, Zhisheng Niu
2007 IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference  
So far, most proposed opportunistic scheduling policies for wireless ad hoc networks exploit local multiuser diversity, i.e., each transmitter selects its best receiver independently.  ...  We formulate the cooperative and opportunistic scheduling problem with fairness requirements into an optimization problem and present its optimal solutions.  ...  For wireless ad hoc networks, the Opportunistic Auto Rate (OAR) scheme is proposed in [2] , by which a flow transmits with higher data rate and more back-to-back packets when its channel condition is  ... 
doi:10.1109/glocom.2007.151 dblp:conf/globecom/ChenYN07 fatcat:scwargxfnfacnmetuifisaznce

A graph theory based opportunistic link scheduling for wireless ad hoc networks

Qing Chen, Qian Zhang, Zhisheng Niu
2009 IEEE Transactions on Wireless Communications  
So far, most proposed opportunistic scheduling policies for ad hoc networks exploit local multiuser diversity, i.e., each transmitter selects its best receiver independently.  ...  Index Terms-Wireless ad hoc networks, multiuser diversity, opportunistic scheduling, proportional fairness, graph theory, maximum weighted independent set. 1536-1276/09$25.00 c ⃝ 2009 IEEE Authorized licensed  ...  For wireless ad hoc networks, the Opportunistic Auto Rate (OAR) scheme is proposed in [2] , by which a flow transmits with higher data rate and more back-to-back packets when the channel condition is  ... 
doi:10.1109/twc.2009.070311 fatcat:qnxtrhcrojgqbd2cuaea67p6o4

ARC: Joint Adaptation of Link Rate and Contention Window for IEEE 802.11 Multi-rate Wireless Networks

An-Chih Li, Ting-Yu Lin, Ching-Yi Tsai
2009 2009 6th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks  
The method of selecting an appropriate link rate for transmitting/retransmitting packets is generally known as the link adaptation mechanism.  ...  IEEE 802.11 wireless network supports multiple link rates at the physical layer.  ...  Opportunistic Auto-rate (OAR) OAR is an opportunistic media access protocol for multirate IEEE 802.11 [19] . OAR is extended from RBAR.  ... 
doi:10.1109/sahcn.2009.5168910 dblp:conf/secon/LiLT09 fatcat:rznxl2pscbgqlbffwb672vk5oi

Medium access control in mobilead hoc networks: challenges and solutions

Hongqiang Zhai, Jianfeng Wang, Xiang Chen, Yuguang Fang
2006 Wireless Communications and Mobile Computing  
To function normally, MANETs demand an efficient and distributed medium access control (MAC) protocol.  ...  Index Terms-Medium access control (MAC), mobile ad hoc networks (MANETs), quality of service (QoS), fairness, energyefficiency.  ...  Batch transmission has also been used in several other schemes, such as OAR (opportunistic auto rate) [53] .  ... 
doi:10.1002/wcm.376 fatcat:ub45o6vfqjeyxgyivw3uw4ark4

Analysis of 802.11b MAC: A QoS, Fairness, and Performance Perspective [article]

Srikant Sharma
2004 arXiv   pre-print
In this survey report, we identify and argue that the Medium Access Controller for 802.11b networks is the prime area for these improvements.  ...  Although 802.11b is adequate for basic connectivity and packet switching, It is evident that there is ample scope for its improvement in areas like quality of service, fairness, performance, security,  ...  Opportunistic Auto Rate Scheme (OAR) B. Sandeghi et al.  ... 
arXiv:cs/0411017v1 fatcat:u6qmal3zzraavfaguah2vqv6fe

Media Access Control Schemes for Mobile Ad Hoc Networks [chapter]

Chun-Hung Lin, Chien-Yuan Liu
2004 Lecture Notes in Computer Science  
TRAF adopts a bi-direction-based approach with an extended option to select an appropriate rate for frame transmission under fast changing channel conditions.  ...  Regarding simulation results, frame delivery ratio, and network throughput of TRAF are significantly improved by comparing to that of other protocols.  ...  [18] propose another receiver-based approach, the opportunistic auto rate (OAR) MAC protocol.  ... 
doi:10.1007/978-3-540-24614-5_5 fatcat:vchsrnigbvayjpsqnvjgj3ad6m

rDCF: A Relay-Enabled Medium Access Control Protocol for Wireless Ad Hoc Networks

Hao Zhu, Guohong Cao
2006 IEEE Transactions on Mobile Computing  
We design a protocol to assist the sender, the relay node and the receiver to reach an agreement on which data rate to use and whether to transmit the data through a relay node.  ...  In this paper, we propose a novel MAC layer relay-enabled distributed coordination function (DCF) protocol, called ÖDCF, to further exploit the physical layer multi-rate capability.  ...  With DCF, the mobile nodes can spontaneously form an ad hoc network without any preinstalled infrastructure.  ... 
doi:10.1109/tmc.2006.137 fatcat:pretuzfyujfr7kkxoawuxamrxy
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