In recent years, innovative positioning and mobile communication techniques have been developed to achieve location-based services (LBS) for navigation, location tracking, logistics, fleet management, marine management, public transportation, mobile commerce, emergency services, event recommendation, etc.

The architecture of LBS includes mobile devices and information servers. The location information of mobile devices can be determined by the positioning techniques and then sent to information servers. Information servers can then provide services to mobile devices based on the location information. For the location determination, the location of a mobile device can be estimated by satellite positioning, mobile positioning, and indoor positioning depending on signals (e.g., angle of arrival, time of arrival, difference of arrival, received signal strength indication, round-trip delay, and relative delay) from satellites, cellular networks and wireless networks. Furthermore, it has become increasingly popular to apply machine learning and deep learning methods in the positioning techniques for the improvement of location accuracy. A variety of LBS applications have been developed to widely support companies, organizations, and governments for pushing contents to their mobile users.

This Special Issue will cover LBS architecture, satellite positioning, mobile positioning, positioning based on machine learning, communication techniques, navigation system, fleet management system, and marine management system. The special issue will solicit papers on: the principles of LBS; LBS technologies including satellite positioning infrastructures and techniques; positioning technologies such as communication and network infrastructures, and middleware; navigation system infrastructures and techniques, mobile positioning infrastructures and techniques, indoor positioning infrastructures and techniques; positioning based on machine learning; positioning based on security techniques; and implementation for smart phone applications. The Special Issue will include LBS applications in navigation systems, fleet management systems, marine management systems, indoor navigation systems, etc. Both original research and review articles are welcome.

Potential topics include but are not limited to the following:

• LBS technologies
• Positioning in LBS
• Communications in LBS
• Navigation in LBS
• Mobile positioning
• Indoor positioning
• Positioning based on machine learning
• Positioning based on security techniques
• LBS applications
• Navigation systems
• Fleet management systems
• Marine management systems
• Indoor navigation system