Full-Duplex Enabled Time-Efficient Device Discovery for Public Safety Communications

  • Zeeshan KaleemEmail author
  • Ajmal Khan
  • Syed Ali Hassan
  • Nguyen-Son Vo
  • Long D. Nguyen
  • Hien M. Nguyen


Device-to-device (D2D) communications is the integral part of public safety (PS) communications. However, the most important requirement is the users’ rapid discovery to timely communicate the emergency information. The existing half-duplex (HD) results in large time delays because it cannot transceive during same time slot. In-band full duplex (IB-FD) communications is an enabler to quickly discover the user because of simultaneous transmission and reception during same time-frequency block. In this paper, we proposed the frame structure for IB-FD system with prioritized PS users in resource allocation. Moreover, to improve spectral efficiency, time-efficient device discovery resource allocation (TE-DDRA) scheme has been proposed as well, where a user can switch the transmission mode from HD to IB-FD when the demand exceeds the available resources in HD mode. The proposal is validated by system-level simulations in terms of discovery time with conventional random access mode. The simulation results shows that with PS priority mode around 37% discovery time as compared with random access mode.


Public safety communications 5G D2D discovery Time efficient discovery 



This work was supported by the Newton Prize 2017.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Electrical and Computer Engineering DepartmentCOMSATS University IslamabadWah CampusPakistan
  2. 2.Electrical and Computer Engineering DepartmentCOMSATS University IslamabadAttock CampusPakistan
  3. 3.School of Electrical Engineering and Computer Science (SEECS)National University of Sciences and Technology (NUST)IslamabadPakistan
  4. 4.Duy Tan UniversityDuy TanVietnam
  5. 5.Queen’s University BelfastBelfastUK

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