Improving cellular capacity with white space offloading

S. Bayhan, L. Zheng, J. Chen, M. Di Francesco, J. Kangasharju, M. Chiang

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

2 Citations (Scopus)


With growing data demand and the current dearth of spectrum, mobile operators are looking for new frequency bands to satisfy data-hungry users. One promising avenue of expansion is TV white spaces, which are currently available to secondary users as long as they do not interfere with primary (i.e., incumbent) users. In this work, we explore the benefits of offloading cellular traffic onto TV white spaces. We develop an analytical model and efficient algorithms to assign users to the cellular network or white space channels by considering their channel gains, multi-user interference on white space channels, and the cost of switching between different networks. We perform extensive data-driven simulations in two representative urban scenarios based on publicly available datasets. Our results show that white spaces can increase capacity by 16-62%, depending on the environment, but careful network selection is necessary to ensure that maximum capacity gains are realized. Moreover, we show that white spaces provide a significant benefit in serving indoor users where cellular channel conditions are poor. Specifically, our algorithms can offload up to 40% of cellular traffic to white spaces for indoor scenarios.
Original languageEnglish
Title of host publication2017 15th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)
Number of pages8
ISBN (Electronic)978-3-901882-90-6
Publication statusPublished - 1 May 2017
MoE publication typeA4 Article in a conference publication
EventInternational Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
- Paris, France
Duration: 15 May 201719 May 2017
Conference number: 15


ConferenceInternational Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
Abbreviated titleWiOpt


  • cellular radio
  • multiuser channels
  • radio spectrum management
  • radiofrequency interference
  • TV white spaces
  • cellular capacity
  • cellular channel
  • cellular network
  • cellular traffic
  • multiuser interference
  • white space channels
  • white space offloading
  • Bandwidth
  • Cellular networks
  • Interference
  • Mobile computing
  • Throughput
  • White spaces

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