On the use of directional antennas for sensor networks

Santivañez, Cesar; Redi, Jason

doi:10.1109/milcom.2003.1290184

Cited by 33 publications

(11 citation statements)

References 3 publications

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“…So far, we used the first-in-first-out (FIFO) queuing service rule in the simulations presented above. The performance gain of CDMAC over 802.11 could be further improved if we can utilize the link diversity to avoid the Head-of-Line (HOL) blocking problem [20,21]. For example, as shown in Fig.…”

Section: Simulation Resultsmentioning

confidence: 99%

Directional medium access control for ad hoc networks

Wang

Zhai

et al. 2008

Wireless Netw

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Using directional antennas in ad hoc networks may introduce the well-known deafness problem, exacerbate the hidden terminal problem and the exposed terminal problem, add difficulty on mobile communication, and distort the operation of existing routing and TCP protocols. Although a lot of studies have been undertaken on the directional MAC protocols, most of them focus only on one or several aspects in their design and performance evaluations, and a comprehensive comparative study is missing. In this paper, we first explore the design space of directional MAC and present a taxonomy of existing schemes. Then, we discuss the major problems in using directional antennas under different category of MAC schemes. After that, we propose coordinated directional medium access control (CDMAC), a novel directional MAC protocol to improve throughput via facilitating the simultaneous contention-free communications for multiple local node-pairs. We evaluate our CDMAC, one representative existing scheme and IEEE 802.11 via extensive ns2 simulations. Our results show CDMAC provides a satisfactory solution to all the major problems and significantly improves the throughput performance.

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Section: Simulation Resultsmentioning

confidence: 99%

Directional medium access control for ad hoc networks

Wang

Zhai

et al. 2008

Wireless Netw

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“…Reference [102] extends the proposed DMAC protocol in [38] but considers per-packet power control and head-of-line (HoL) unblocking issues. Similar to DMAC in [38], the transmitter sends a RTS with directional antenna (DRTS) and the receiver receives with omni-directional antenna.…”

Section: Power Control-based Single-channel Dmac Protocolmentioning

confidence: 99%

Directional Medium Access Control (MAC) Protocols in Wireless Ad Hoc and Sensor Networks: A Survey

Wong

Chen

Chin

2015

JSAN

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This survey paper presents the state-of-the-art directional medium access control (MAC) protocols in wireless ad hoc and sensor networks (WAHSNs). The key benefits of directional antennas over omni-directional antennas are longer communication range, less multipath interference, more spatial reuse, more secure communications, higher throughput and reduced latency. However, directional antennas lead to single-/multi-channel directional hidden/exposed terminals, deafness and neighborhood, head-of-line blocking, and MAC-layer capture which need to be overcome. Addressing these problems and benefits for directional antennas to MAC protocols leads to many classes of directional MAC protocols in WAHSNs. These classes of directional MAC protocols presented in this survey paper include single-channel, multi-channel, cooperative and cognitive directional MACs. Single-channel directional MAC protocols can be classified as contention-based or non-contention-based or hybrid-based, while multi-channel directional MAC protocols commonly use a common control channel for control packets/tones and one or more data channels for directional data transmissions. Cooperative directional MAC protocols improve throughput in WAHSNs via directional multi-rate/single-relay/multiple-relay/two frequency channels/polarization, while cognitive directional MAC protocols leverage on conventional directional MAC protocols with new twists to address dynamic spectrum access. All of these directional MAC protocols are the pillars for the design of future directional MAC protocols in WAHSNs.

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“…In the former scenario, the transmitter switches the antenna if it does not receive any acknowledgment, and in the latter scenario, the transmitter sequentially sends multiple copies of the same packet on a different antenna. References [18] and [19] explore the use of directional antennas in WSNs and show their potential to provide increased throughput and reduced latency.…”

Section: Spatial Diversity and Cooperative Diversitymentioning

confidence: 99%

Wireless Industrial Monitoring and Control Networks: The Journey So Far and the Road Ahead

Zand

Chatterjea

Das

et al. 2012

JSAN

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While traditional wired communication technologies have played a crucial role in industrial monitoring and control networks over the past few decades, they are increasingly proving to be inadequate to meet the highly dynamic and stringent demands of today's industrial applications, primarily due to the very rigid nature of wired infrastructures. Wireless technology, however, through its increased pervasiveness, has the potential to revolutionize the industry, not only by mitigating the problems faced by wired solutions, but also by introducing a completely new class of applications. While present day wireless technologies made some preliminary inroads in the monitoring domain, they still have severe limitations especially when real-time, reliable distributed control operations are concerned. This article provides the reader with an overview of existing wireless technologies commonly used in the monitoring and control industry. It highlights the pros and cons of each technology and assesses the degree to which each technology is able to meet the stringent demands of industrial monitoring and control networks. Additionally, it summarizes mechanisms proposed by academia, especially serving critical applications by addressing the real-time and reliability requirements of industrial process automation. The article also describes certain key research problems from the physical layer communication for sensor networks and the wireless networking perspective that have yet to be addressed to allow the successful use of wireless technologies in industrial monitoring and control networks.

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On the use of directional antennas for sensor networks

Cited by 33 publications

References 3 publications

Directional medium access control for ad hoc networks

Directional medium access control for ad hoc networks

Directional Medium Access Control (MAC) Protocols in Wireless Ad Hoc and Sensor Networks: A Survey

Wireless Industrial Monitoring and Control Networks: The Journey So Far and the Road Ahead

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