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Cooperative D2D discovery approach for public safety based on spreading technique

机译：基于传播技术的公共安全协同D2D发现方法

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In world news, natural disasters are frequently cited. Their devastating consequences make of them a crucial study subject to decrease their impact. Scientific researchers take advantage of 3GPP and D2D communication to help to save lives. D2D technology can be an alternative communication in a natural disaster situation with a total or partial absence of network infrastructure. Victims must be able to transmit SOS messages using their devices even in presence of other victims transmission or other systems communication to guarantee their detection. In this paper, we propose to consider that a receiver probes all physical resource blocs in a given spectrum band based LTE networks in order to be able to detect victims. Spreading technique is used when an SOS is transmitted and correlation is analysed in the receiver side in order to decide whether a victim is using a Resource Bloc to ask for help or not. We propose, as well, to multiply the number of receivers in different locations. This will let us to exploit the users diversity in order to enhance the detection accuracy based on hard information combining. Hence, receivers will cooperate to derive a reliable decision about an SOS transmission. Their hard decisions will be gathered by a fusion center and combined based on OR, AND, Majority and Two Witnesses Rules. Finally, simulations were carried out to prove the effectiveness of our proposed scheme based on the analysis of the detection, mis-detection and false alarm probabilities.
机译：在世界新闻中，经常提到自然灾害。它们的毁灭性后果使它们成为减少影响的关键研究课题。科研人员利用3GPP和D2D通信来挽救生命。 D2D技术可以是在自然灾害情况下完全或部分缺少网络基础结构的替代通信。受害者必须能够使用其设备传输SOS消息，即使在存在其他受害者传输或其他系统通信的情况下，也要保证被检测到。在本文中，我们建议考虑接收器探测基于给定频段的LTE网络中的所有物理资源组，以便能够检测到受害者。当发送SOS并在接收方分析相关性时，可以使用扩展技术，以便确定受害者是否正在使用Resource Bloc寻求帮助。我们还建议增加不同位置的接收器数量。这将使我们能够利用用户的多样性，以基于硬信息组合来提高检测准确性。因此，接收器将合作以得出有关SOS传输的可靠决策。他们的艰难决定将由融合中心收集，并基于“或”，“与”，“多数和两名证人”规则进行合并。最后，通过对检测，误检测和虚警概率的分析，进行了仿真，以证明所提方案的有效性。

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