Browsing by Author "Alharbi, Wafa"

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IBBRB: Intelligent Blockchain-based Reputation Broker for Robot Selection
(University of Technology Sydney, 2023-12) Alharbi, Wafa; Hussain, Farookh Khadeer
Robot as a service (RAAS) is a cloud-based subscription service that enables robotic devices to be leased instead of purchased. RAAS has recently increased in popularity due to the numerous advantages that it offers to robotic service requesters such as flexibility and the lower cost of entry and maintenance compared to owning the equipment, and the ease of implementation. The concept of RAAS has contributed to the increased use of robots in different disciplines, such as industry, education, health and agriculture. Robotic service requesters may face difficulties in searching for the most suitable robot for their required tasks based on their preferences. Robot selection has attracted the interest of many researchers and it has been widely discussed in the literature. Robot selection is based on ranking the available robotic alternatives after they have been assessed by robotic experts. The assessment process is based on customer requirements as well as the task’s functional and non-functional requirements. However, through a systematic literature review, it has been identified that selecting a robot based on its previous performance in similar tasks has not been discussed yet. Furthermore, all the proposed robot selection methods require robotic experts to determine the requirements and robotic alternatives. To address these issues, this research aims to propose and develop an intelligent blockchain-based reputation broker for robot selection termed IBBRB. IBBRB is an intelligent reputation system that allows robotic service requesters (customers) to rate the performance of robots after hiring them. To avoid data manipulation, which is a common issue with reputation systems, blockchain technology is used to store and secure all trust values in IBBRB. IBBRB is built to provide novel and intelligent mechanisms to: (i) standardise robotic knowledge across all robotic service requesters, suppliers and manufacturers by encapsulating all the robotic attributes and their relationships into an ontological manifestation called Robotic Attribute Ontology (RAO), and then to propose a blockchain-based method for RAO evolution using a crowdsourcing approach, (ii) develop a comprehensive method to carry out robotic reputation computations termed Reliable Reputation Computation Method for Robotics (RRCM). RRCM incorporates building: (a) a reputation model that produces reputation values for robots based on previous customers’ ratings, and (b) a prediction model that predicts reputation values for non-reviewed robots to bootstrap new robots and overcome the cold start issue, (iii) develop a method to infer reputation values for all non-reviewed contexts of multi-purpose robots based on their similarities to the reviewed contexts. Finally, this research uses software prototyping to validate the performance and accuracy of the aforementioned proposed methods.
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