Improvements between 2.8% and 7.9% was observed when no security is implemented for delay. For throughput performance, improvements ranged between 1.6% and 8.2% depending on the transport (TCP/UDP) and network (IPv4/IPv6) layer protocol. Our experiments indicate a performance improvement when no security is implemented relative to other security modes. The performance analysis is based on throughput, delay, jitter, loss ratio and connection time. We study the impact of security on 802.11AC WLANs using different security modes (No Security, Personal and Enterprise Security) using a test WLAN. IEEE 802.11ac specification is currently the widely used WLAN standard deployed by most organizations. Notwithstanding, their inherent characteristics make them more vulnerable to security breaches compared to wired networks. Wireless Local Area Networks (WLAN) are gaining popularity due to the ease of use and ubiquity. Finally, we bring up some future challenges in this area with several potential solutions to motivate further research work. Then, we discuss standard-related organizations that are working actively in the area of civilian unmanned systems. We also focus on several available promising standards that can be modified for these data links. Satellite links, cellular technologies, Wi-Fi and several similar wireless technologies are studied thoroughly in this paper. The contribution of this survey is to highlight the strength and weakness of the current data link options and their suitability to satisfy the UAVs communication requirements. Our goal is to study the current trends and available candidates and carry out a comprehensive comparison among them. This motivated us to provide a comprehensive survey of potential data link technologies available for UAVs. Unlike the traditional wireless communications, the data links for these systems do not have any general standardized framework yet to ensure safe co-existence of UAVs with other flying vehicles. There has been tremendous growth in different applications of UAVs such as lifesaving and rescue missions, commercial use, recreations, etc. This survey studies the potential data link candidates for unmanned aircraft vehicles (UAVs). In actual application, the trial projects have been highly recognized by public security customers. Finally, a test scenario for the maximum number of concurrent users and server bandwidth performance is designed, implemented and analyzed. And a load balancing access scheme based on NAT address translation is designed.
Respectively presents a secure access solution for wired video and wireless video. Proposes a mobile police video security access link solution based on SSL VPN for network clients. This paper analyzes the access mechanism of SSL VPN in encryption, identity authentication and resource access control. While carrying the ability to carry higher video streams, it is both safe and reliable, and has strong scalability in performance. Therefore, this paper proposes a three-step strategy for access control, encrypted transmission, and wireless video security inspection. Mobile police video security access link is an important boundary channel to ensure the secure and trusted access of mobile video in the private video network.
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