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IEEE ICC 2015 Workshop on LTE in Unlicensed Bands (LTE-U)


June 12, 2015

Workshop Sessions

Workshop Organizers

Dr. Andrea Goldsmith, Stanford University, USA (
Dr. Alireza Babaei, CableLabs, USA (
Dr. Jennifer Andreoli-Fang, CableLabs, USA (
Dr. Klaus Doppler, Nokia Research Center, USA (

TCP Chairs

Dr. Shiwen Mao, Auburn University, USA (
Dr. Karthik Sundaresan, NEC Laboratories America, (
Dr. Sayantan Choudhury, Nokia Research Center, USA (

Important Dates

Submission deadline:
January 31, 2015
Paper Acceptance Notification:
March 1, 2015
Camera-ready submission deadline:
March 15, 2015

LTE in Unlicensed Bands: Potentials and Challenges (CFP in PDF)

The exponential growth of mobile data traffic and the scarcity and costliness of licensed spectrum are driving mobile network operators (MNOs) to consider offloading at least part of their traffic onto the unlicensed spectrum. Most recently, the 3GPP is considering extending the use of LTE into the unlicensed spectrum as a seamless approach to enable traffic offload. This new approach is dubbed LTE Unlicensed (LTE-U). Compared to Wi-Fi, LTE-U offers MNOs a way to offload traffic onto the unlicensed spectrum with a technology that seamlessly integrates into their existing LTE evolved packet core (EPC) architecture. Furthermore, LTE-U promises higher throughout and spectral efficiency than Wi-Fi, with estimates ranging from 2x to 5x improvement over Wi-Fi. Currently two operating modes are under discussion: 1) unlicensed spectrum is aggregated with existing licensed channels and 2) unlicensed spectrum acts as the only carrier for LTE-U where both data and control channels reside.The liberal non-exclusive use of unlicensed spectrum has spurred innovation on the one hand, but has also created the need for coexistence measures when various uncoordinated wireless networks operate on the same frequency. In this case, LTE-U introduces new coexistence challenges for other technologies operating in the same unlicensed bands particularly for legacy Wi-Fi. Wi-Fi is designed to coexist with other technologies through channel sensing and random backoff, while LTE is designed with the assumption that one operator has exclusive control of a given spectrum. Furthermore, LTE traffic channels are designed to continuously transmit with minimum time gap even in the absence of data traffic. Consequently, Wi-Fi users will have little chance to sense a clear channel and deem it suitable for transmission.The goal of this full-day workshop is to bring together academics, researchers, and practitioners to discuss the opportunities, challenges and potential solutions for operation of LTE in the unlicensed bands. The topics of interest include, but are not limited to:

  • Coexistence of schedule-based and contention-based networks in unlicensed bands
  • Fairness considerations for coexistence of LTE and Wi-Fi
  • Performance impact of LTE on networks operating in the unlicensed band
  • Radio resource management, dynamic channel selection and band steering for LTE/WiFi coexistence
  • Traffic demand-aware coexistence
  • Distributed and centralized techniques for coexistence of heterogeneous networks
  • Technical challenges and solutions of operating LTE solely on the unlicensed bands
  • QoS model for standalone LTE-U access model

Paper submission link:

Information for Authors: Prospective authors are invited to submit original technical papers by the deadline January 31, 2015. All submissions should be written in English with a maximum paper length of Six (6) printed pages (10-point font) including figures without incurring additional page charges (maximum 1 additional page with over length page charge if accepted). Please also see the Section in the main ICC 2015 website for Authors Guidelines.

Registration: Please see the Section in the main ICC 2015 website on Registration.