Hybrid division duplex system for next-generation cellular services

Sangboh Yun, Seung Young Park, Yeonwoo Lee, Daeyoung Park, Yungsoo Kim, Kiho Kim, Chung Gu Kang

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


The paper proposes a new duplexing scheme, which is called the hybrid division duplex (HDD), that is suitable for fourth-generation mobile communication systems. The proposed mobile communication system is much more flexible and efficient in providing asymmetric data service and managing intercell interference by exploiting the advantages of both time division duplex (TDD) and frequency division duplex (FDD) schemes. The HDD scheme has a pair of frequency bands such as the FDD, performing a TDD operation using one of the bands in such a manner that allows for simultaneous FDD and TDD operations. Considering the properties of the HDD system architecture, frequency hopping orthogonal frequency division multiple (OFDM) access is adopted in one band for the TDD operation and code division multiple access (CDMA) in the other band for the FDD uplink operation. The important advantage of the HDD scheme is the robustness against cross time slot interference that is inherent to the TDD system, which is caused by the asynchronous downlink/uplink switching boundaries among all neighbor cells. From the simulation results, the proposed system can achieve approximately 7% and 30% improvement with regard to the downlink and uplink throughput, respectively, as compared to the conventional TDD system under cell-independent downlink/uplink traffic asymmetries. It demonstrates that the HDD scheme is a viable solution for future communication systems that are projected to have a cell-independent asymmetric-traffic-supported hierarchical cell structure.

Original languageEnglish
Pages (from-to)3040-3059
Number of pages20
JournalIEEE Transactions on Vehicular Technology
Issue number5
Publication statusPublished - 2007 Sept


  • Code division multiple access (CDMA)
  • Frequency division duplex (FDD)
  • Frequency hopping orthogonal frequency division multiple access (FH-OFDMA)
  • Hybrid division duplex (HDD)
  • Time division duplex (TDD)

ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Automotive Engineering


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