ntel made several announcements at MWC 2015, including a new chipset for wireless connectivity (Wi-Fi) in mobile devices. This new chipset, the 8270, include in-chip support for indoor location positioning.
Z. Yang, C. Wu, and Y. Liu. Proceedings of the 18th Annual International Conference on Mobile Computing and Networking, page 269--280. New York, NY, USA, ACM, (2012)
S. Moosavi-Dezfooli, Y. Pignolet, and D. Dzung. Proceedings of the 2016 International Conference on Embedded Wireless Systems and Networks, page 41--46. USA, Junction Publishing, (2016)