A framework for hotspot support using Wi-Fi direct based device-to-device links

Alami, Mouaad El; Benamar, Nabil; Younis, Mohamed; Shahin, Ahmed A.

doi:10.1109/iwcmc.2017.7986345

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…According to Google's documentation, by design, an Android device that acts as a Wi-Fi hotspot can support a maximum of 10 devices only (El Alami et al, 2017) . Our testing confirmed that this was correct-for the devices and Android version tested, the hotspot declined additional connections once 10 devices were connected.…”

Section: Maximum Number Of Devices Connectedmentioning

confidence: 99%

Exploring the Feasibility of Deploying Technology Enhanced School-Based Teacher Continuous Professional Development in Internet-Limited Environments in Tanzania

Maro,

Kondoro,

Mtebe

et al. 2024

IRRODL

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In low-income countries, the use of technology to enhance teacher continuous professional development (TCPD) activities has been increasing significantly. However, most technology initiatives related to TCPD require the installation of complex information and communications technology (ICT) infrastructure in schools or availability of reliable Internet connectivity. While installation of ICT infrastructure is costly, the cost of the Internet is unaffordable to most teachers in low-income countries. This study explored the feasibility of deploying Raspberry Pi computers and tablets as micro-servers to facilitate school-based TCPD activities via a learning management system (LMS) without Internet connectivity. Teachers in eight schools in Dar es Salaam and Lindi accessed a TCPD sample module with Raspberry Pi and tablets providing hotspotting and treated as offline local servers hosting a LMS. After the trial, data was collected through focus group discussion, observation, and LMS logs involving 69 teachers. The findings showed that both Raspberry Pi and tablets could be used as micro-servers to provide access to learning resources in offline environments, but Raspberry Pi fared more favorably. Raspberry Pi was easy to set up and connected more devices than did the tablet. However, Raspberry Pi required careful handling as it is a delicate device. Interestingly, there was no significant difference in terms of the performance and cost of the two micro-servers. This study provided further evidence that both Raspberry Pi and tablets could be cost-effective approaches to deliver TCPD activities without installing complex ICT infrastructure or in areas with limited Internet connectivity.

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Section: Maximum Number Of Devices Connectedmentioning

confidence: 99%

Exploring the Feasibility of Deploying Technology Enhanced School-Based Teacher Continuous Professional Development in Internet-Limited Environments in Tanzania

Maro,

Kondoro,

Mtebe

et al. 2024

IRRODL

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“…Arnaboldi et al [25] proposed a new middleware layer protocol to support autonomous connection and inter-group communication. El Alami et al [26] focused on the ability of sending data to Internet using WFD-based device-to-device links. They provided an insight into how to implement cross-groups communication with WFD.…”

Section: Related Workmentioning

confidence: 99%

A Local Communication System Over Wi-Fi Direct: Implementation and Performance Evaluation

Wang

et al. 2020

IEEE Internet Things J.

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Wireless communication demands increase sharply with the explosive growth of mobile devices. The communications mainly depend on the infrastructure-based networks, e.g., WLANs and cellular networks. However, such wireless connections may be unavailable in crowded areas (e.g., concert and conference hall) or interrupted by infrastructure failures caused by earthquake or tsunami. These promote the evolution of local communication systems over device-to-device communication, such as Bluetooth and Wi-Fi Direct (WFD). However, none of existing studies construct a full-featured local communication system, and they do not consider how to support the user mobility either. In this paper, we implement and evaluate the performance of a WFD-based local communication system. First of all, we improve the intra-group communication by the native implementation of WFD on Android platform, and propose an application-layer forwarding solution for the inter-group communication, which can be applied to three or more connected groups. Then, we put forward a self-adaptive handover mechanism taking user mobility and node failures into account. To deal with the uncertainty in handover decision procedure, a fuzzy logic based normalized quantitative decision algorithm (FNQD) with the weights derived from fuzzy analytic hierarchy process (FAHP) is utilized. Finally, we evaluate the performance of the system through both simulation and experiment analysis. Results show that we can get a maximum throughput of 31.7 Mbps for the intra-group communication and a maximum goodput of 4.76 Mbps for the inter-group communication. What's more, mobile devices could perform various types of handover according to their roles and status, which could improve the robustness of the local communication system.

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“…Each user starts a normal 802.11 scan on its device to find a previously formed P2P group, or for finding WiFi-Direct devices that also want to form a new group. For the purpose, they perform the search and listen phases over wireless channels by sending Probe Requests to get a response by a Probe Response [3]. Once the devices discover each other over the same channel, they move to the Group Formation phase.…”

Section: Device Discoverymentioning

confidence: 99%

“…However, to avoid overloading the infrastructures, it is better to enable direct inter-device communication when possible. When devices are in proximity of each other, problems of radio access network load and core network load are observed [3]. One of the methods used to overcome these limitations and effectively manage local group communication while offloading data from the cellular network is to establish direct communication between the nearby devices, and this kind of communication is called IoT D2D communication.…”

Section: Introductionmentioning

confidence: 99%

Secure WiFi-Direct Using Key Exchange for IoT Device-to-Device Communications in a Smart Environment

et al. 2019

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With the rapid growth of Internet of Things (IoT) devices around the world, thousands of mobile users share many data with each other daily. IoT communication has been developed in the past few years to ensure direct connection among mobile users. However, wireless vulnerabilities exist that cause security concerns for IoT device-to-device (D2D) communication. This has become a serious debate, especially in smart environments where highly sensitive information is exchanged. In this paper, we study the security requirements in IoT D2D communication. In addition, we propose a novel authentication approach called Secure Key Exchange with QR Code (SeKeQ) to verify user identity by ensuring an automatic key comparison and providing a shared secret key using Diffie-Hellman key agreement with an SHA-256 hash. To evaluate the performance of SeKeQ, we ran a testbed using devices with a WiFi-Direct communication interface. The obtained results depict that our proposal can offer the required security functions including key exchange, data confidentiality, and integrity. In addition, our proposal can reach the same security performances as MANA (Manual Authentication) and UMAC (Universal-Hashing Message Authentication Code) but with 10 times fewer key computations and reduced memory occupancy.

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A framework for hotspot support using Wi-Fi direct based device-to-device links

Cited by 9 publications

References 9 publications

Exploring the Feasibility of Deploying Technology Enhanced School-Based Teacher Continuous Professional Development in Internet-Limited Environments in Tanzania

Exploring the Feasibility of Deploying Technology Enhanced School-Based Teacher Continuous Professional Development in Internet-Limited Environments in Tanzania

A Local Communication System Over Wi-Fi Direct: Implementation and Performance Evaluation

Secure WiFi-Direct Using Key Exchange for IoT Device-to-Device Communications in a Smart Environment

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