Results 1 - 10 of 33

Mutichannel MAC Protocols for Wireless Networks

by Ritesh Maheshwari, Himanshu Gupta, Samir R. Das - In SECON , 2006
"... Abstract — In this paper, we develop two new MAC protocols for multichannel operation in wireless ad hoc and mesh networks. The first protocol, Extended Receiver Directed Transmission protocol (xRDT) is based on a previously known multichannel solution called Receiver Directed Transmission (RDT) tha ..."
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-based Multichannel MAC (LCM MAC). LCM MAC performs coordinated channel negotiations and channel switching to provide multichannel support. We demonstrate the effectiveness of these two protocols over two other wellknown multichannel protocols – MMAC and DCA – via extensive ns2 simulations. I.

H-MMAC: A Hybrid Multi-channel MAC Protocol for Wireless Ad hoc Networks

by Duc Ngoc, Minh Dang, Choong Seon Hong
"... Abstract—In regular wireless ad hoc network, the Medium Access Control (MAC) coordinates channel access among nodes and the throughput of the network is limited by the bandwidth of a single channel. The multi-channel MAC protocols can exploit the multiple channels to achieve a high throughput by ena ..."
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by enabling more concurrent transmissions in the network. Dynamic Channel Assignment (DCA [5]), Multi-channel MAC (MMAC [2]) and Pipelining Multi-channel MAC (-Mc [7]) are three multi-channel MAC protocol representatives. In the DCA protocol, the dedicated control channel cannot be fully utilized or causes

FD-MMAC: Combating Multi-Channel Hidden and Exposed Terminals Using a Single Transceiver

by Yan Zhang, Loukas Lazos, Kai Chen, Bocan Hu, Swetha Shivaramaiah
"... Abstract—We address the problem of improving the throughput and delay efficiency of distributed multi-channel MAC (MMAC) protocols. We design an MMAC protocol called FD-MMAC that exploits recent advances in full-duplex (FD) communications to coordinate channel access in a distributed manner. Compare ..."
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Abstract—We address the problem of improving the throughput and delay efficiency of distributed multi-channel MAC (MMAC) protocols. We design an MMAC protocol called FD-MMAC that exploits recent advances in full-duplex (FD) communications to coordinate channel access in a distributed manner

Least Channel Variation Multi-Channel MAC (LCV-MMAC) under Mobile Random Topologies in Mobile Adhoc Networks

by Shagufta Henna, Muhammad Bilal Saleemi
"... The use of multiple channels for transmissions has raised several challenges, for example, multi-channel hidden terminal problem, channel switching delay, and control channel saturation problem. Dedicated control channel techniques simplify channel coordina-tion by eliminating the need for synchroni ..."
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the properties of LCV-MMAC through extensive simulations with the help of ns-2, and compare it with popular ex-isting multi-channel MAC protocols in different mobile and static random topologies. Experimental results validate that LCV-MMAC achieves significantly better aggregated throughput, and fairness in

A Collision Avoidance Multi-channel MAC Protocol with Physical Carrier Sensing for Mobile Ad Hoc Networks

by Kuei-Ping Shih , Yen-Da Chen , Shu-Sheng Liu - IEEE 24th International Conference on Advanced Information Networking and Applications Workshops (WAINA , 2010
"... Abstract-Carrier sensing mechanism has been adopted in IEEE 802.11 MAC for collision avoidance under single channel based wireless ad hoc networks. However, due to the hardware limitation, the carrier sensing mechanism can not help much in single transceiver and multi-channel scenarios. In this pap ..."
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collisions. The performance of π-Mc is compared with two well-known multichannel MAC protocols and IEEE 802.11 DCF. Simulation results show that π-Mc is able to achieve 2.50 times the throughput of IEEE 802.11 DCF, as well as respectively outperform DCA and MMAC with a factor of up to 1.43 and 1.32 under

Enhanced multi-channel MAC protocols in Wireless Ad hoc Networks

by Duc Ngoc, Minh Dang, Tra Huong, Thi Le, Choong Seon Hong
"... This paper proposes a multi-channel MAC protocol with directional antennas (MMAC-DA). Each node pair exchange control packets on the control channel during the control window to determine the beam’s direction and negotiate the data channel. By exploiting multiple channel resources and improving the ..."
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This paper proposes a multi-channel MAC protocol with directional antennas (MMAC-DA). Each node pair exchange control packets on the control channel during the control window to determine the beam’s direction and negotiate the data channel. By exploiting multiple channel resources and improving

Multichannel MAC Protocol for AdHoc Wireless Networks

by Sudthida Wiwatthanasaranrom, Anan Phonphoem - in Proceedings of the National Computer Science and Engineering Conference , 2003
"... In the regular Ad-Hoc or Infrastructures wireless LANs a single channel shared among nodes in the networks. Once the number of nodes in the system increases it causes the performance of the overall system to decrease. In this paper proposes a medium access control (MAC) protocol for ad hoc wireless ..."
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networks (MMAC) that uses multiple channels.We can improve throughput with multiple channels because multiple transmissions can take place simultaneously without interfering each other. This proposed protocol uses N channel where N is independent of the number of nodes in the network. We modify IEEE 802

On-Demand Channel Switching for MultiChannel Wireless MAC Protocols

by Priyank Porwal, Maria Papadopouli - In Proceedings of the 12th European Wireless Conference , 2006
"... Abstract – We propose and analyze the on-demand channel switching (ODC), a novel broadcast-based medium access control (MAC) protocol for ad-hoc wireless networks with multiple channels at each host. The ODC performs an on-demand, dynamic, channel selection based on the traffic conditions of the cha ..."
Abstract - Cited by 7 (0 self) - Add to MetaCart
legitimate traffic. This can enhance the bandwidth utilization, reduce packet delays, and increase energy savings. ODC does not require any specialized hardware. We evaluate the ODC with extensive simulations and compare it with the IEEE 802.11 and another related MAC protocol (MMAC). We found that the flow

A Multi-channel MAC Protocol with Power Control for Ad hoc Networks

by Dang Ngoc, Minh Duc, Choong Seon Hong
"... The medium access control (MAC) protocol is designed only for single channel in the IEEE 802.11 standard. That means the throughput of the network is limited by the bandwidth of the channel. The multi-channel can be exploited to get more concurrent transmission. Our new scheme of Multi-channel MAC p ..."
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protocol with Power Control named MMAC-PC can avoid the multi-channel hidden terminal problem as well as improve the performance of the network.

Multi-channel MAC protocol with Directional Antennas in Wireless Ad hoc Networks

by unknown authors
"... (DCF) is based on Carrier Sense Multiple Access with Colli-sion Avoidance (CSMA/CA). However, the CSMA-based access protocol with omnidirectional antennas can cause the serious unfairness or flow starvation. By exploiting the multiple channels and using the directional antennas, nodes located in eac ..."
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in each other’s vicinity may communicate simultaneously. This helps to increase the spatial reuse of the wireless channel and thus increase the network performance. In this paper, we propose a Multi-channel MAC protocol with Directional Antennas (MMAC-DA) that adopts IEEE 802.11 Power Saving Mechanism
Results 1 - 10 of 33