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A Blockchain-Based Spatial Crowdsourcing System for Spatial Information Collection Using a Reward Distribution

机译：一种基于区块链的空间覆盖系统用于使用奖励分发的空间信息收集

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Due to the increasing relevance of spatial information in different aspects of location-based services, various methods are used to collect this information. The use of crowdsourcing due to plurality and distribution is a remarkable strategy for collecting information, especially spatial information. Crowdsourcing can have a substantial effect on increasing the accuracy of data. However, many centralized crowdsourcing systems lack security and transparency due to a trusted party’s existence. With the emergence of blockchain technology, there has been an increase in security, transparency, and traceability in spatial crowdsourcing systems. In this paper, we propose a blockchain-based spatial crowdsourcing system in which workers confirm or reject the accuracy of tasks. Tasks are reports submitted by requesters to the system; a report comprises type and location. To our best knowledge, the proposed system is the first system that all participants receive rewards. This system considers spatial and non-spatial reward factors to encourage users’ participation in collecting accurate spatial information. Privacy preservation and security of spatial information are considered in the system. We also evaluated the system efficiency. According to the experiment results, using the proposed system, information accuracy increased by 40%, and the minimum time for reviewing reports by facilities reduced by 30%. Moreover, we compared the proposed system with the current centralized and distributed crowdsourcing systems. This comparison shows that, although our proposed system omits the user’s history to preserve privacy, it considers a consensus-based approach to guarantee submitted reports’ accuracy. The proposed system also has a reward mechanism to encourage more participation.
机译：由于基于位置的服务的不同方面的空间信息的相关性增加，使用各种方法来收集这些信息。由于多元和分布而使用众包是收集信息的显着策略，特别是空间信息。众包可能对提高数据的准确性有很大的影响。然而，由于党的存在，许多集中式众包系统缺乏安全性和透明度。随着区块链技术的出现，在空间众包系统中存在安全性，透明度和可追溯性。在本文中，我们提出了一种基于区块的空间众包系统，其中工人确认或拒绝了任务的准确性。任务是请求者向系统提交的报告;报告包括类型和位置。为了我们的最佳知识，所提出的系统是所有参与者获得奖励的第一个系统。该系统考虑了空间和非空间奖励因素，以鼓励用户参与收集准确的空间信息。在系统中考虑了隐私保存和空间信息的安全性。我们还评估了系统效率。根据实验结果，使用所提出的系统，信息准确性提高了40％，并通过设施审查报告的最短时间减少了30％。此外，我们将所提出的系统与当前的集中式和分布式众包进行比较。这一比较表明，虽然我们的提出的系统省略了用户的历史以保护隐私，但它考虑了基于共识的方法来保证提交的报告准确性。建议的系统还有奖励机制，以鼓励更多的参与。

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