Results 1 - 10 of 1,199

Multi-Channel MAC for Ad Hoc Networks: Handling Multi-Channel Hidden Terminals Using a Single Transceiver

by Jungmin So, Nitin Vaidya - In ACM MobiHoc , 2004
"... This paper proposes a medium access control (MAC) protocol for ad hoc wireless networks that utilizes multiple channels dynamically to improve performance. The IEEE 802.11 standard allows for the use of multiple channels available at the physical layer, but its MAC protocol is designed only for a si ..."
Abstract - Cited by 431 (6 self) - Add to MetaCart
single channel. A single-channel MAC protocol does not work well in a multi-channel environment, because of the multi-channel hidden terminal problem. Our proposed protocol enables hosts to utilize multiple channels by switching channels dynamically, thus increasing network throughput. The protocol

Cognitive Radio Ad-Hoc Networks: Some New Results on Multi-Channel Hidden Terminal Problem

by Avar Venkateswaran, Srishti Shaw, Hya Pattanayak, Rabindranath N , 2012
"... Recently the Cognitive Radio (CR), in particular the CR Ad-Hoc Network (CRAHN) technology appears as a burgeon-ing area in wireless communication that enables utilization of limited network resources in more efficient and intelligent way; studies indicate that opportunistic utilization of the availa ..."
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of the available radio frequency spectrum, without interfering the licensed primary user (PU) could be made. This paper presents some simulation based performance of the Multi-Channel Hidden Terminal (MCHT) problem on CRAHNs; new observations on the effect of the number of channels on certain PU-activity metrics

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.

Handling Triple Hidden Terminal Problems for Multi-Channel MAC in Long-Delay Underwater Sensor Networks

by Zhong Zhou, Zheng Peng , Jun-hong Cui, Zaihan Jiang
"... In this paper, we investigate the multi-channel MAC problem in underwater acoustic sensor networks. To reduce hardware cost, only one acoustic transceiver is often preferred on every node. In a single-transceiver multichannel long-delay underwater network, new hidden terminal problems, namely multi- ..."
Abstract - Cited by 8 (2 self) - Add to MetaCart
In this paper, we investigate the multi-channel MAC problem in underwater acoustic sensor networks. To reduce hardware cost, only one acoustic transceiver is often preferred on every node. In a single-transceiver multichannel long-delay underwater network, new hidden terminal problems, namely multi-channel

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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. Compared with prior MMAC designs, the FD-MMAC protocol eliminates the use of in-band or out-of-band control channels for combat-ing the multi-channel hidden terminal problem, discovering the resident channel of destinations, and performing load balancing. Furthermore, FD-MMAC improves the spectral

A MAC Protocol for Multi-Channel Multi-Interface Wireless Mesh Network using Hybrid Channel Assignment Scheme *

by Chi-yu Li, An-kai Jeng, Rong-hong Jan
"... In recent years, Wireless Mesh Network (WMN) which uses a multi-hop configuration to extend the reach of the last-mile access to Internet has come into public notice. WMN improves network performance by the use of multiple orthogonal (non-overlap-ping) channels and multiple wireless interfaces. Howe ..."
Abstract - Cited by 5 (0 self) - Add to MetaCart
assignment strategy to solve the rendezvous problem and a waiting time scheme for updating network allocation vectors (NAVs) to solve the multi-channel hidden terminal problem. Simulation results show that the proposed protocol can achieve a better utilization of both interfaces and channels.

MULTI CHANNEL MAC FOR WIRELESS SENSOR NETWORKS

by M. Ramakrishnan, P. Vanaja Ranjan
"... In this work, Sensor Multi Channel (SMC) Medium Access Control (MAC) has been proposed for wireless sensor networks. The SMC MAC uses a dedicated control channel and multiple data channels. The effective solution for the multi channel hidden terminal problem and missing receiver problem has been pro ..."
Abstract - Cited by 3 (0 self) - Add to MetaCart
In this work, Sensor Multi Channel (SMC) Medium Access Control (MAC) has been proposed for wireless sensor networks. The SMC MAC uses a dedicated control channel and multiple data channels. The effective solution for the multi channel hidden terminal problem and missing receiver problem has been

DUTY CYCLED MULTI CHANNEL MAC FOR WIRELESS SENSOR NETWORKS

by M. Ramakrishnan
"... In this work, Duty Cycled Sensor Multi Channel (DC-SMC) Medium Access Control (MAC) has been proposed for wireless sensor networks. The DC-SMC MAC uses a dedicated control channel and multiple data channels. The effective solution for the multi channel hidden terminal problem and missing receiver pr ..."
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In this work, Duty Cycled Sensor Multi Channel (DC-SMC) Medium Access Control (MAC) has been proposed for wireless sensor networks. The DC-SMC MAC uses a dedicated control channel and multiple data channels. The effective solution for the multi channel hidden terminal problem and missing receiver

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 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

A Medium Access Control Protocol for Multi-Channel Multi-Interface Wireless Mesh Network

by Chi-yu Li, An-kai Jeng
"... In recent years, Wireless Mesh Network (WMN) which uses a multi-hop configuration to extend the reach of the last-mile access to Internet has come into public notice. WMN improves network performance by the use of mul-tiple orthogonal (non-overlapping) channels and multiple wireless interfaces. Howe ..."
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assignment strategy. Thus we can solve the rendezvous problem easily. In order to solve multi-channel hidden ter-minal problem, the proposed protocol employs a waiting time scheme to update network allocation vectors (NAVs). Moreover, we employ a dynamic staying period scheme and a dynamic waiting time
Results 1 - 10 of 1,199