A novel radio resource optimization method for relay-based unmanned aerial vehicles

Yuki Takahashi, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


Unmanned aircraft systems (UASs) have attracted worldwide attention in recent years because of their potential applicability in a multitude of fields such as environmental monitoring and the communication provisioning environment. These applications enable data to be remotely collected from distant places through unmanned aerial vehicles (UAVs) equipped with communication devices. However, the communication range of a single UAV is limited because of the restrictions of the wireless transceiver as a result of the payload limitation. Therefore, UASs consisting of relay-based UAVs in which data are transferred via multiple UAVs have been studied to achieve long-distance communication with a high throughput. The time division long-term evolution advanced (TD-LTE-A) relaying technique may be applicable to UASs as it offers a reasonable solution. However, this technique is currently ineffective for UASs due to the limitation caused by its frame configuration. To alleviate this issue, in this paper, we propose a method to optimize radio resources based on the TD-LTE-A frame structure, which is capable of realizing efficient relay communication. Our proposed method considers a flexible frame configuration and updates cycle of control information to overcome the shortcoming of the conventional scheme. The effectiveness of the proposed radio resource optimization is demonstrated through simulation under varying environments.

Original languageEnglish
Article number8450635
Pages (from-to)7352-7363
Number of pages12
JournalIEEE Transactions on Wireless Communications
Issue number11
Publication statusPublished - 2018 Nov


  • TD-LTE-A
  • Unmanned aircraft system (UAS)
  • relay communication
  • resource optimization
  • time division multiple access (TDMA)
  • unmanned aerial vehicle (UAV)

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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