Reliable and energy-efficient downward packet delivery in asymmetric transmission power-based networks

Hyung Sin Kim, Myung Sup Lee, Young June Choi, Jeonggil Ko, Saewoong Bahk

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


In low-power wireless networks, maintaining multihop connectivity is considered effective in constructing communication routes between individual nodes to a gateway. Since sensor networks are typically used for data collection, multihop routing protocols are designed to find routes optimal in upward directions. As sensor networks become widely applied to diverse applications, efficient downward traffic delivery also becomes important. To achieve this, we consider an asymmetric transmission power-based network (APN), where a power-supplied gateway uses high-power radios to cover the entire network via single-hop transmission, whereas common nodes use low-power transmissions. For effective APN operations, we propose a single-hop downlink protocol (SHDP) that consists of direct downlink transmission, local acknowledgment, neighbor forwarding, and contention resolution among the destination's neighbors. We evaluate SHDP through mathematical analysis, simulations, and testbed experiments. Our proposal outperforms other competitive multihop routing protocols. Specifically, SHDP shows high packet delivery performance and lowers the duty cycle greatly while reducing the packet transmission overhead by >50%.

Original languageEnglish
Article number34
JournalACM Transactions on Sensor Networks
Issue number4
Publication statusPublished - 2016 Sept

Bibliographical note

Publisher Copyright:
© 2016 ACM.

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications


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