6 research outputs found
Enhancing Block-Wise Transfer with Network Coding in CoAP
CoAP (Constrained Application Protocol) with block-wise transfer (BWT) option
is a known protocol choice for large data transfer in general lossy IoT network
environments. Lossy transmission environments on the other hand lead to CoAP
resending multiple blocks, which creates overheads. To tackle this problem, we
design a BWT with network coding (NC), with the goal to reducing the number of
unnecessary retransmissions. The results show the reduction in the number of
block retransmissions for different values of blocksize, implying the reduced
transfer time. For the maximum blocksize of 1024 bytes and total probability
loss of 0.5, CoAP with NC can resend up to 5 times less blocks.Comment: 4 pages, 2 figures, submitted to Euro-Par 201
A survey of communication protocols for internet of things and related challenges of fog and cloud computing integration
The fast increment in the number of IoT (Internet of Things) devices is accelerating the research on new solutions to make cloud services scalable. In this context, the novel concept of fog computing as well as the combined fog-to-cloud computing paradigm is becoming essential to decentralize the cloud, while bringing the services closer to the end-system. This article surveys e application layer communication protocols to fulfill the IoT communication requirements, and their potential for implementation in fog- and cloud-based IoT systems. To this end, the article first briefly presents potential protocol candidates, including request-reply and publish-subscribe protocols. After that, the article surveys these protocols based on their main characteristics, as well as the main performance issues, including latency, energy consumption, and network throughput. These findings are thereafter used to place the protocols in each segment of the system (IoT, fog, cloud), and thus opens up the discussion on their choice, interoperability, and wider system integration. The survey is expected to be useful to system architects and protocol designers when choosing the communication protocols in an integrated IoT-to-fog-to-cloud system architecture.Peer ReviewedPostprint (author's final draft
An Experimental Study of Network Coded REST HTTP in Dynamic IoT Systems
REST HTTP is the communication protocol of choice for software developers
today. In IoT systems with unreliable connectivity, however, a stateless
protocol like REST HTTP needs to send a request message multiple times, and it
only stops the retransmissions when an acknowledgement arrives at the sender.
In our previous work, we studied the usage of random linear network coding
(RLNC) for REST HTTP protocol to reducing the amount of unnecessarily
retransmissions. In this paper, we experimentally validate the study and
analyze REST HTTP with and without RLNC in a simple testbed in dynamic IoT
systems. The measurements show notable improvements in bandwidth utilization in
terms of reducing the retransmissions and delay when using network-coded REST
HTTP.Comment: 7 pages, 5 figures, accepted at IEEE International Conference on
Communications (ICC), Dublin, Ireland, 202
A survey of communication protocols for internet of things and related challenges of fog and cloud computing integration
The fast increment in the number of IoT (Internet of Things) devices is accelerating the research on new solutions to make cloud services scalable. In this context, the novel concept of fog computing as well as the combined fog-to-cloud computing paradigm is becoming essential to decentralize the cloud, while bringing the services closer to the end-system. This article surveys e application layer communication protocols to fulfill the IoT communication requirements, and their potential for implementation in fog- and cloud-based IoT systems. To this end, the article first briefly presents potential protocol candidates, including request-reply and publish-subscribe protocols. After that, the article surveys these protocols based on their main characteristics, as well as the main performance issues, including latency, energy consumption, and network throughput. These findings are thereafter used to place the protocols in each segment of the system (IoT, fog, cloud), and thus opens up the discussion on their choice, interoperability, and wider system integration. The survey is expected to be useful to system architects and protocol designers when choosing the communication protocols in an integrated IoT-to-fog-to-cloud system architecture.Peer Reviewe