On the TDD subframe structure for beyond 4G radio access network

Eeva Lähetkangas, Kari Pajukoski, Esa Tiirola, Ilkka Harjula, Jaakko Vihriälä

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

25 Citations (Scopus)


The purpose of a Beyond 4G (B4G) radio access technology, is to cope with the expected exponential increase of mobile data traffic in local area (LA). The requirements related to physical layer control signaling latencies and to hybrid ARQ (HARQ) round trip time (RTT) are in the order of ~1ms. In this paper, we propose a flexible orthogonal frequency division multiplexing (OFDM) based time division duplex (TDD) physical subframe structure optimized for B4G LA environment. We show that the proposed optimizations allow very frequent link direction switching, thus reaching the tight B4G HARQ RTT requirement and significant control signaling latency reductions compared to existing LTE-Advanced and WiMAX technologies.
Original languageEnglish
Title of host publicationProceedings
Subtitle of host publicationFuture Network and Mobile Summit 2013, FuNeMS 2013
PublisherIEEE Institute of Electrical and Electronic Engineers
ISBN (Electronic)978-1-905824-37-3
Publication statusPublished - 2013
MoE publication typeNot Eligible
EventFuture Network and Mobile Summit, FuNeMS 2013 - Lisbon, Portugal
Duration: 3 Jul 20135 Jul 2013


OtherFuture Network and Mobile Summit, FuNeMS 2013
Abbreviated titleFuNeMS 2013


  • beyond 4G
  • cyclic prefix
  • guard period
  • OFDM
  • subrame
  • TDD

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