Quality of service and security in wireless and mobile networks

This special issue brings together nine contributions, selected from a total of 25 submissions, that address the issues of architectures, technologies, and protocols for wireless and mobile communication systems. The selected papers propose and analyze some of the most interesting and innovative solutions dealing with the QoS and Security management in wireless mobile networks, from different viewpoints, including the QoS-based channel time allocation and scheduling in IEEE 802.15.3 wireless PANs, QoS analysis of IEEE 802.15.4 Low rate WPAN technology in industrial application scenarios, QoS routing with obstacle avoidance properties in wireless sensor network scenarios, QoS, and the impact of security solutions on performance in wireless sensor networks, security architectures over QoS-aware multi-operator wireless mesh networks, low-overhead secure time synchronization in heterogeneous wireless sensor networks, secure routing protocols with privacy protection for mobile ad hoc networks, secure pre-authentication-based network access protocols for mobile ad hoc networks, and protocol enhancements against jamming attacks in wireless sensor networks.