An efficient medium access control protocol for mobile ad hoc networks using antenna arrays

Pan, Yuxin; Hamouda, Walaa; Elhakeem, A.K.

doi:10.1109/cjece.2007.364331

Cited by 10 publications

(10 citation statements)

References 18 publications

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“…In this section, we give an overview of the directional MAC protocol proposed in [15]. Later, we consider this MAC protocol, as one of the existing protocols, to evaluate the performance of the ad hoc network on a slow-fading channel.…”

Section: Protocol Reviewmentioning

confidence: 99%

“…Later, we consider this MAC protocol, as one of the existing protocols, to evaluate the performance of the ad hoc network on a slow-fading channel. In [15], each mobile ad-hoc station is equipped with a global positioning system (GPS) to obtain its position information. Different from other directional MAC protocols, in [15], the RTS and CTS frames can carry position and antenna weight information.…”

Section: Protocol Reviewmentioning

confidence: 99%

“…Based on the performance results presented in [13], the authors showed that both DMAC and MMAC perform better than the IEEE 802.11 (although the performance is dependent on some conditions in the network [13]). Furthermore, in [15], a two-channel MAC layer protocol that avoids the hidden-terminal problem has been introduced and examined over AWGN channels. The proposed protocol in [15] includes a new frame called Request for address.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, in [15], a two-channel MAC layer protocol that avoids the hidden-terminal problem has been introduced and examined over AWGN channels. The proposed protocol in [15] includes a new frame called Request for address. This frame is used to exchange the position information among active stations which is then used to update the antenna array weights.…”

Section: Introductionmentioning

confidence: 99%

“…In this case, the throughput improvement is achieved through multiple frequency channels and based on a single-antenna transmission/reception. As an alternative to using multiple frequency channels, it has been shown that the use of directional antennas can bring the overall system throughput to higher levels (e.g., [10]- [15]). In these multiple antenna systems, every ad hoc node is assumed to be equipped with multiple antennas to improve the spatial use of the channels between different users in the network.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

WSN07-5: Performance of Directional MAC Protocols in Ad-Hoc Networks over Fading Channels

Liu

Hamouda

Youssef³

2006

IEEE Globecom 2006

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The application of directional antennas in mobile ad-hoc networks (MANETs) has proved to offer large throughput gains relative to single-antenna systems. Recent works on directional Medium-Access-Control (MAC) protocols have been only focused on their performance over additive white-Gaussian noise (AWGN) channels. In this paper, we evaluate the performance of directional MAC protocols when the channel is modeled as a slow-fading one. In this case, directional antennas are used for the transmission of data frames while control frames are sent using an omnidirectional antenna. Considering a slow-fading channel, our results show large throughput improvements when using directional MAC protocols relative to the IEEE 802.11 standard. Furthermore we show that the throughput loss on the fading channels relative to the AWGN channel, can be well compensated using antenna arrays. All our results show that the use of directional antennas at the mobile station can improve the channel efficiency in an ad-hoc network.

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Section: Protocol Reviewmentioning

confidence: 99%

Section: Protocol Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

WSN07-5: Performance of Directional MAC Protocols in Ad-Hoc Networks over Fading Channels

Liu

Hamouda

Youssef³

2006

IEEE Globecom 2006

Self Cite

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Performance of a MANET directional MAC protocol with angle‐of‐arrival estimation

Liu

Hamouda

Youssef

2007

Wireless Communications

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The use of directional antennas in mobile ad hoc networks (MANETs) has shown to offer large throughput gains relative to omnidirectional antennas. When used in ad hoc networks, directional medium‐access‐control (DMAC) protocols usually require all nodes, or part of nodes, to be aware of their exact locations. This location information is typically provided using a global positioning system (GPS). Although GPS systems are designed to be as nearly accurate as possible, there are still estimation errors that can cause a relatively large deviation from the actual GPS receiver position. In this paper, we investigate the effect of inaccurate node position estimation on the throughput of these protocols. Our results clearly indicate that the advantages of DMAC protocols diminish if the available position information is not accurate enough. As an alternative, we propose an efficient DMAC protocol that utilizes signal parameter estimation via the rotational invariance technique (ESPRIT) for direction‐of‐arrival (DOA) estimation; alleviating the need for GPS and, hence, avoiding the degrading associated with typical GPS position estimation errors. Moreover, unlike GPS‐based protocols, our protocol is suitable for both outdoor and indoor applications. Under different operating conditions and channel models, our simulation results show the throughput improvement achieved using the proposed protocol relative to the IEEE 802.11. Copyright © 2007 John Wiley & Sons, Ltd.

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Multi‐channel power‐controlled directional MAC for wireless mesh networks

Martignon¹

2011

Wireless Communications

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Wireless Mesh Networks (WMNs) have emerged recently as a technology for providing high-speed last mile connectivity in next-generation wireless networks. Several MAC protocols that exploit multiple channels and directional antennas have been proposed in the literature to increase the performance of WMNs. However, while these techniques can improve the wireless medium utilization by reducing radio interference and the impact of the exposed nodes problem, they can also exacerbate the hidden nodes problem. Therefore, efficient MAC protocols need to be carefully designed to fully exploit the features offered by multiple channels and directional antennas.In this paper we propose a novel Multi-Channel Power-Controlled Directional MAC protocol (MPCD-MAC) for nodes equipped with multiple network interfaces and directional antennas. MPCD-MAC uses the standard RTS-CTS-DATA-ACK exchange procedure. The novel difference is the transmission of the RTS and CTS packets in all directions on a separate control channel, while the DATA and ACK packets are transmitted only directionally on an available data channel at the minimum required power, taking into account the interference generated on already active connections.This solution spreads the information on wireless medium reservation (RTS/CTS) to the largest set of neighbors, while data transfers take place directionally on separate channels to increase spatial reuse. Furthermore, power control is used to limit the interference produced over active nodes.We measure the performance of MPCD-MAC by simulation of several realistic network scenarios, and we compare it with other approaches proposed in the literature. The results show that our scheme increases considerably both the total traffic accepted by the network and the fairness among competing connections.

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An efficient medium access control protocol for mobile ad hoc networks using antenna arrays

Cited by 10 publications

References 18 publications

WSN07-5: Performance of Directional MAC Protocols in Ad-Hoc Networks over Fading Channels

WSN07-5: Performance of Directional MAC Protocols in Ad-Hoc Networks over Fading Channels

Performance of a MANET directional MAC protocol with angle‐of‐arrival estimation

Multi‐channel power‐controlled directional MAC for wireless mesh networks

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