Fair Coexistence of Scheduled and Random Access Wireless Networks: Unlicensed LTE/WiFi Articles uri icon

publication date

  • December 2017

start page

  • 3267

end page

  • 3281

issue

  • 6

volume

  • 25

International Standard Serial Number (ISSN)

  • 1063-6692

Electronic International Standard Serial Number (EISSN)

  • 1558-2566

abstract

  • We study the fair coexistence of scheduled and random access transmitters sharing the same frequency channel. Interest in coexistence is topical due to the need for emerging unlicensed LTE technologies to coexist fairly withWiFi. However, this interest is not confined to LTE/WiFi as coexistence is likely to become increasingly commonplace in IoT networks and beyond 5G. In this paper, we show that mixing scheduled and random access incurs an inherent throughput/delay cost and the cost of heterogeneity. We derive the joint proportional fair rate allocation, which casts useful light on current LTE/WiFi discussions. We present experimental results on inter-technology detection and consider the impact of imperfect carrier sensing.

keywords

  • coexistence; spectrum sharing; unlicensed LTE; LTE-U; LAA-LTE; WiFi; CSAT; LBT; LBE; proportional fairness