Multimedia Internet of Things: A Comprehensive Survey <s> K. MULTIMEDIA APPLICATIONS AND SMART CITY <s> The Internet of Things (IoT) has become a promising technology for addressing societal challenges by connecting smart devices and leveraging Big Data analytics to create smart cities worldwide. As the IoT scales up, it's important to provide interoperability among different devices. Yet current simple standard protocols lack sufficient openness and interoperability. IoT for smart cities needs to guarantee the accessibility of open data and cloud services to allow industries and citizens to develop new services and applications. Here, the authors provide a case study of the GreenIoT platform in Uppsala, Sweden, to demonstrate the idea of interoperability and open data for smart cities. <s> BIB001 </s> Multimedia Internet of Things: A Comprehensive Survey <s> K. MULTIMEDIA APPLICATIONS AND SMART CITY <s> One of the most important goals of vehicular ad hoc networks (VANETs) in smart cities is the efficient management of accidents, specially to prevent them. Our research lies on a promising smart service, which soon might be available in our cities. After the occurrence of an accident, a vehicle could make a light and short video of the situation and send it through the VANET till reaching an access point in the infrastructure of the city to alert the emergencies service (e.g., 911 or 112). With a video message, the level of seriousness of the accident could be better interpreted by the authorities (i.e., health care unit, police, ambulance drivers) than with a simple text message. In this way, vehicles could participate in reporting a situation in the city using the ad hoc network so it would be possible to have a quick reaction of the emergency units and even prevent further accidents. The deployment of an efficient routing protocol to manage video-reporting messages in VANETs has important benefits by enabling a fast warning of the incident, which potentially might save lives. To contribute with this goal, we propose a multimedia multimetric map-aware routing protocol to provide video-reporting messages over VANETs in smart cities. Furthermore, a realistic scenario is created by using real maps with SUMO including buildings that may interfere the signal between sender and receiver. Also, we use our REVsim tool that allows vehicles to avoid choosing vehicles behind buildings to be chosen as next forwarding nodes. Simulations show the benefits of our proposal, taking into account the mobility of the nodes and the presence of interfering buildings. <s> BIB002
M-IoT applications support a wide variety of applications, assisting in building a smart city by providing varied networks and architectures BIB002 , BIB001 . These applications contribute a major portion in the industry, agriculture, road management systems, and security (as discussed comprehensively in section III). However, work to secure and authenticate voice assistant systems has not been studied. The collaboration of these applications in the smart city requires integration in 5G. The integration of M-IoT has not been studied significantly.