Design and Implementation of a Full-Duplex Pipelined MAC Protocol for Multihop Wireless Networks

Wooyeol Choi, Jaehyoung Park, Yonggang Kim, Ashutosh Sabharwal, Hyuk Lim

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


In multihop wireless networks, data packets are forwarded from a source node to a destination node through intermediate relay nodes. With half-duplex relay nodes, the end-to-end delay performance of a multihop network degrades as the number of hops increases, because the relay nodes cannot receive and transmit at the same time. Full-duplex relay nodes can reduce their per-hop delay by starting to forward a packet before the whole packet is received. In this paper, we propose a pipelined medium access control (PiMAC) protocol, which enables the relay nodes on a multihop path to simultaneously transmit and receive packets for full-duplex forwarding. For pipelined transmission over a multihop path, it is important to suppress both the self-interference of each relay node with the full-duplex capability and the intra-flow interference from the next relay nodes on the same path. In the PiMAC protocol, each relay node can suppress both the self-A nd intra-flow interference for full-duplex relaying on the multihop path by estimating the channel coefficients and delays of the interference during a multihop channel acquisition phase. To evaluate the performance of the PiMAC protocol, we carried out extensive simulations and software-defined radio-based experiments.

Original languageEnglish (US)
Article number7990230
Pages (from-to)14930-14942
Number of pages13
JournalIEEE Access
StatePublished - Jul 23 2017


  • Full-duplex
  • MAC protocol
  • intra-flow interference
  • multihop transmission
  • wireless relay network

ASJC Scopus subject areas

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)


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