Packet Loss Characterization in WiFi-Based Long Distance Networks

Sheth, Anmol; Nedevschi, Sergiu; Patra, Rabin; Surana, Sonesh; Brewer, Eric; Subramanian, L.

doi:10.1109/infcom.2007.44

Cited by 96 publications

(94 citation statements)

References 7 publications

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“…Such a consideration is important since such regions form a large fraction of the world today. Some examples of rural mesh networks include [3]- [5], and [8]. We first motivate why the performance behavior of links in such networks needs a detailed study.…”

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confidence: 99%

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On the Feasibility of the Link Abstraction in Wireless Mesh Networks

Raman

Chebrolu

Gokhale

et al. 2009

IEEE/ACM Trans. Networking

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Abstract-Outdoor community mesh networks based on IEEE 802.11 have seen tremendous growth in the recent past. The current understanding is that wireless link performance in these settings is inherently unpredictable, due to multipath delay spread. Consequently, researchers have focused on developing intelligent routing techniques to achieve the best possible performance. In this paper, we are specifically interested in mesh networks in rural locations. We first present detailed measurements to show that the PHY layer in these settings is indeed stable and predictable. There is a strong correlation between the error rate and the received signal strength. We show that interference, and not multipath fading, is the primary cause of unpredictable performance. This is in sharp contrast with current widespread knowledge from prior studies. Furthermore, we corroborate our view with a fresh analysis of data presented in these prior studies. While our initial measurements focus on 802.11b, we then use two different PHY technologies as well, operating in the 2.4-GHz ISM band: 802.11g and 802.15.4. These show similar results too. Based on our results, we argue that outdoor rural mesh networks can indeed be built with the link abstraction being valid. This has several design implications, including at the MAC and routing layers, and opens up a fresh perspective on a wide range of technical issues in this domain.Index Terms-IEEE 802.11, IEEE 802.15.4, interference, link abstraction, link-level measurements, rural networks, WiFi, wireless mesh networks.

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confidence: 99%

“…We then present extensive measurements to show that links can indeed have predictable performance. While such measurements have been done for WiFi-based Long Distance (WiLD) links earlier [7], [8], in this work we consider more traditional, short-distance links (e.g., deployed within a village).…”

mentioning

confidence: 99%

On the Feasibility of the Link Abstraction in Wireless Mesh Networks

Raman

Chebrolu

Gokhale

et al. 2009

IEEE/ACM Trans. Networking

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“…However, in a long distance link, a node may start transmitting a packet remaining unaware of another packet transmission from the other end. Therefore, as the signal propagation time increases in long distance links, the probability of packet loss due to collision also increases proportionally [21].…”

Section: Performance Of Csma/ca and Tdma In Wild Networkmentioning

confidence: 99%

“…The widespread standard for WLANs, IEEE 802.11b/g operating in the 2.4 GHz frequency band, is one of the most popular wireless standards. The license-free operations in the ISM band and a variety of available low cost IEEE 802.11 hardware commodities make WiFi an attractive and economically feasible communication alternative for rural use [21]. Various research outcomes have also established the viability of WiFi as a practical solution for long distance communication.…”

Section: Introductionmentioning

confidence: 99%

TDMA MAC Protocols for WiFi-based Long Distance Networks: A Survey

Hussain¹,

Sarma²,

Saikia³

2014

IJCA

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WiFi is widely being researched to use it beyond its original purpose of short-range communication. These kinds of efforts are stimulated due to its mass production and cost-effectiveness. WiFibased Long Distance (WiLD) networks envisage changing the rural communication scenario particularly in the undeveloped nations. However, CSMA/CA, the de-facto MAC protocol of WiFi, is found to be ill-suited for WiLD networks. As a result, various TDMA-based MAC protocols are proposed in the literature as an alternative to CSMA/CA. The proposed protocols have shown significant performance improvement in such scenarios. In this paper, we propose a classification framework of WiLD MAC protocols based on their major characteristics. Using the classification framework, a survey on the MAC protocols proposed for WiLD networks is presented. The distinctive features of the TDMA MAC protocols are critically examined by pointing out their strengths and weaknesses in WiLD environment. In addition, this paper puts forward some state of art open research challenges in this area.

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“…The network will consist of clusters of boats forming a wireless mesh network amongst them. These clusters will be connected to the base station on the shore using hierarchical point to multi-point backhaul links based on LongRange (LR) Wi-Fi technology [2] [4]. Note that LR Wi-Fi uses TDMA MAC [3] [5].…”

Section: Introductionmentioning

confidence: 99%