Long range communications in urban and rural environments

Oliveira, Rodolfo; Guardalben, Lucas; Sargento, Susana

doi:10.1109/iscc.2017.8024627

Cited by 49 publications

(33 citation statements)

References 6 publications

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“…Recent research on LoRa/LoRaWAN has mainly focused on LoRa performance evaluation in terms of coverage, capacity, scalability and lifetime. The studies have been carried out using real deployments in [11] and [12], mathematical models in [13] and [14], or computer simulations in [4] and [15]. Almost all these works have assumed perfectly orthogonal SF s although it has been shown in [2] and [8] that this is not a valid assumption.…”

Section: Related Workmentioning

confidence: 99%

Fair Adaptive Data Rate Allocation and Power Control in LoRaWAN

Abdelfadeel

Cionca

Pesch

2018

2018 IEEE 19th International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM)

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In this paper, we present results of a study of the data rate fairness among nodes within a LoRaWAN cell. Since LoRa/LoRaWAN supports various data rates, we firstly derive the fairest ratios of deploying each data rate within a cell for a fair collision probability. LoRa/LoRaWAN, like other frequency modulation based radio interfaces, exhibits the capture effect in which only the stronger signal of colliding signals will be extracted. This leads to unfairness, where far nodes or nodes experiencing higher attenuation are less likely to see their packets received correctly. Therefore, we secondly develop a transmission power control algorithm to balance the received signal powers from all nodes regardless of their distances from the gateway for a fair data extraction. Simulations show that our approach achieves higher fairness in data rate than the state-of-art in almost all network configurations.

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Section: Related Workmentioning

confidence: 99%

Fair Adaptive Data Rate Allocation and Power Control in LoRaWAN

Abdelfadeel

Cionca

Pesch

2018

2018 IEEE 19th International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM)

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“…This dissertation also quantifies the importance of SF over other parameters and provides both researchers and system adopters a rule of thumb to always select the lowest SF whenever possible. The results in Section 3.1 agrees with the those presented in [51][52][53][54][55] for coverage in open environments and [56,57] for coverage in indoor environments. In contrast to [58] where signal propagation is modeled for different environments, this dissertation tries to model the effect of different parameters on coverage under varying environments in Section 3.1.…”

Section: Related Work and Conclusionsupporting

confidence: 85%

Experience of LoRa low power wide area network

Liando¹

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I have reviewed the content and presentation style of this thesis and declare it is free of plagiarism and of sufficient grammatical clarity to be examined. To the best of my knowledge, the research and writing are those of the candidate except as acknowledged in the Author Attribution Statement. I confirm that the investigations were conducted in accord with the ethics policies and integrity standards of Nanyang Technological University and that the research data presented honestly and without prejudice.

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“…The above water surface communication range could be up to 30 km. Oliveira et al [12] aim to measure the impact of structures for LoRa communication range, the study obtains 5.6 km and 2 km ranges in suburban and urban areas. LoRa and FSK are compared analyzed for IoT applications for smart cities by [13].…”

Section: Related Workmentioning

confidence: 99%

A Survey on LoRaWAN Architecture, Protocol and Technologies

et al. 2019

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Internet of Things (IoT) expansion led the market to find alternative communication technologies since existing protocols are insufficient in terms of coverage, energy consumption to fit IoT needs. Low Power Wide Area Networks (LPWAN) emerged as an alternative cost-effective communication technology for the IoT market. LoRaWAN is an open LPWAN standard developed by LoRa Alliance and has key features i.e., low energy consumption, long-range communication, builtin security, GPS-free positioning. In this paper, we will introduce LoRaWAN technology, the state of art studies in the literature and provide open opportunities. Several LPWANs emerged on both licensed and unlicensed bands, LoRaWAN, Sigfox and, NB-IoT are widely deployed vital technologies [3].Sigfox is an ultra-narrow band network that is patented and operated by Sigfox. Sigfox occupies 100 Hz and operates at 433MHz, 868MHz and 915MHz frequencies depending on the geographical regions. Technology has strict constraints on the number of packets (140 per day) and the packet size (12 bytes) to be sent. Also, LoRaWAN has similar policies to prevent network congestion allowing channels to be available only %1 duty-cycle for EU 868MHz (See Section 2.4.7). NB-IoT is an ultra-narrow band technology developed by the 3GPP group which can be adopted on GSM and LTE networks. It occupies 200 MHz bandwidth and can reach up to 200 kbps data transmission speed. Compared to LoRaWAN, Sigfox and NB-IoT operated by global network operators which limit deployments of the private networks [4].An overview comparison of the three networks is shown in Table 1. When LPWAN characteristics are considered LoRaWAN becomes a strong candidate for both scientific and industrial uses cases.LoRa referrer to Long Range and a physical layer technology patented by Semtech [5].LoRaWAN is an open protocol proposed by the LoRa Alliance which enables the MAC layer for the network [6].In this study, we will introduce the technological aspects of LoRaWAN and the state of art studies fulfilled about LoRaWAN till today. LoRaWAN protocol was first released in 2015 and had a few minor revisions, the differences in the protocol has been highlighted in the relevant subsection. In the survey, we will introduce LoRaWAN in depth both technological aspects and the use cases of its different areas. We categorized literature studies as in Figure 1. Studies are classified as two main sections; network technology and the applications, each section has own sub-branches. The majority of the work is focused on the coverage tests and applicability of the technology for different fields from large scale smart city applications to personal tracking assets. However, there are still gaps in the literature where researchers can address these problems such as post-disaster communication, decentralized networks, network management, and Adaptive Data Rate.

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Long range communications in urban and rural environments

Cited by 49 publications

References 6 publications

Fair Adaptive Data Rate Allocation and Power Control in LoRaWAN

Fair Adaptive Data Rate Allocation and Power Control in LoRaWAN

Experience of LoRa low power wide area network

A Survey on LoRaWAN Architecture, Protocol and Technologies

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