Modified HWMP for Wireless Mesh Networks with Smart Antennas

Rafique, Muhammad Irfan; Porsch, Marco; Bauschert, Thomas

doi:10.1109/glocom.2011.6134098

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…In the following, as foundation for understanding PSPSA, MHWMP is described briefly. For more details interested readers are referred to [19].…”

Section: Related Workmentioning

confidence: 99%

“…In [19] the diversity gain achieved by STBC [20] was utilized to extend the communication range when sending RTS/CTS frames prior to data transmission with beamforming. However, in realistic scenarios the diversity gain heavily depends upon the nature of the environment (uncorrelated and correlated radio propagation conditions), see e.g.…”

Section: Mac Protocol Modificationmentioning

confidence: 99%

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Path Selection and Adaptive Selection of Smart Antenna Transmission Schemes in Multi-hop Wireless Networks

Rafique¹,

Bauschert²

2012

Information and Communication Technologies

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Abstract. The performance of multi-hop wireless networks can be substantially improved by using smart antennas. However, the utilization of smart antennas is quite challenging as the benefit of the different transmission modes strongly depends on specific channel conditions. In this paper we present a novel path selection protocol PSPSA (path selection protocol for smart antennas) and a modified MAC protocol that exploits the benefits of smart antennas. PSPSA selects an optimum path considering the specific ranges and transmission rates implied by the different transmission schemes (spatial multiplexing and beamforming). The MAC protocol is a modification of the traditional DCF scheme to cope with the different PHY layer transmission schemes. Our solution enables mesh nodes to dynamically select their transmission scheme on a per packet basis according to the current channel conditions. Simulation results show that the overall packet success rate (throughput) of multi-hop wireless networks are substantially improved. IntroductionIn the last decade multi-hop wireless networks have captured a great importance due to their diverse applications. However the multi-hop structure and the uncertainty of the wireless channel are critical performance limiting factors. The amendments at PHY layer proposed in IEEE 802.11n [1] could increase the efficiency of multi-hop networks but the incorporation of smart antenna features is quite challenging due to the mutual influence of the transmission scheme and the MAC mechanism. Furthermore the choice of the transmission scheme strongly depends on the current network topology and channel conditions, see [4]. For example, beamforming enables directional transmission with extended range thus being suitable for sparse network topologies whereas spatial multiplexing enables high bit rate omni-directional transmission with lower range thus exploiting advantages in dense networks. Thus, a transmitting node might also influence a different number of neighboring nodes depending on whether beamforming or spatial multiplexing is used. Hence it is advisable that path selection protocol, MAC mechanisms and PHY layer transmission techniques are operating in a well aligned manner.

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“…In the following, as foundation for understanding PSPSA, MHWMP is described briefly. For more details interested readers are referred to [19].…”

Section: Related Workmentioning

confidence: 99%

Section: Mac Protocol Modificationmentioning

confidence: 99%

Path Selection and Adaptive Selection of Smart Antenna Transmission Schemes in Multi-hop Wireless Networks

Rafique¹,

Bauschert²

2012

Information and Communication Technologies

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“…Rafique et al [45] introduce the modified HWMP (MHWMP), which uses smart antennas to overcome scalability and stability issues, by avoiding link outages, and to improve the overall network performance. Smart antennas (an improvement of directional antennas) allow to explore the channel diversity efficiently.…”

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confidence: 99%

A review of scalability and topological stability issues in IEEE 802.11s wireless mesh networks deployments

Sampaio

Souto

Vasques

2015

Int J Communication

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Scalability and topological stability are two of the most challenging issues in current wireless mesh networks (WMNs) deployments. In the literature, both the scalability and the topological stability of WMNs are described as likely to suffer from poor performance due to the ad hoc nature of the underlying IEEE 802.11 mechanisms. The main contribution of this article is a comprehensive review of the main topological stability and scalability-related issues in IEEE 802.11s-based networks. Moreover, the most relevant proposed solutions are surveyed, where both the drawbacks and the merits of each proposal are highlighted. At the end of the article, some open research challenges are presented and discussed. It is expected that this work may serve as motivation for more and deeper research on these issues to allow the design of future more stable and scalable IEEE 802.11s mesh networks deployments. 672 S. SAMPAIO, P. SOUTO AND F. VASQUES Figure 1. IEEE 802.11s network elements described in the standard [5].are combined with node H as it provides connectivity to the BSS B3-so, acting as mesh gate-and also connects the MBSS to a non-802.11 LAN, so acting as a portal. Note that any mesh gate is also a mesh STA.The aforementioned mesh properties enable, among other, fast deployment, low installation cost, and reliable communication. Consequently, their application spans a wide range of application domains from broadband home, community, and neighboring-enterprise-metropolitan areatransportation systems to building automation, health, medical, and security surveillance networks [6]. Nevertheless, current IEEE 802.11s mesh network deployments are typically small-sized, and it is yet unclear if they can scale to realistic network sizes, and support more demanding types of traffic such as real-time communication § .The challenge of introducing mesh capabilities in both medium access control (MAC) and physical (PHY) layers, while keeping compatibility with other IEEE 802.11 standards, makes the recently released IEEE 802.11s standard a hot topic of interest by researchers in the WMN's field. This article addresses the challenges to ensure scalability and topological stability in this networks.Scalability is a well-known issue in multi-hop networking, such as the IEEE 802.11s. Basically, when the size of the network increases, its performance behavior may significantly degrade [10]. It is an important factor for the performance of a mesh network [11]. However, this issue has not been studied in depth in the IEEE 802.11s; hence, there are still few research works in the literature about the scalability of IEEE 802.11s WMNs. The cause, as emphasized by Srivathsan et al. in [12], may be that network providers are beginning to implement their own mechanisms. Topological stability means that the self-organization process should be robust enough to sustain the assignment of links over a reasonable period without performance degradation or breakage; on the other hand, that the topology change and vicinity conditions (e.g., neighbors ...

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IRONMAN: Infrastructured RSSI-based Opportunistic routiNg in Mobile Adhoc Networks

Grazia

Klapez

Casoni

2020

2020 16th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)

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Modified HWMP for Wireless Mesh Networks with Smart Antennas

Cited by 3 publications

References 22 publications

Path Selection and Adaptive Selection of Smart Antenna Transmission Schemes in Multi-hop Wireless Networks

Path Selection and Adaptive Selection of Smart Antenna Transmission Schemes in Multi-hop Wireless Networks

A review of scalability and topological stability issues in IEEE 802.11s wireless mesh networks deployments

IRONMAN: Infrastructured RSSI-based Opportunistic routiNg in Mobile Adhoc Networks

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