TY - GEN
T1 - Age-optimal NC-HARQ protocol for multi-hop satellite-based Internet of Things
AU - Liu, Shiqi
AU - Jiao, Jian
AU - Ni, Zilin
AU - Wu, Shaohua
AU - Zhang, Qinyu
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - In satellite-based internet of things (S-IoT), a noted limitation is the non-trivial propagation delay due to the long distances. Hence, to support emergent real-time IoT applications, where information must be transmitted with short end-to-end latency, the traditional hybrid automatic repeat request (HARQ) strategies in terrestrial network are not fit anymore because the reliable feedback transmission has low efficiency in S-IoT. In this paper, we propose a network code HARQ (NC-HARQ) transmission protocol combined with the concept of information timeliness, i.e., age of information (AoI) to realize limited/no feedback multi-hop transmission in S-IoT. We consider a two-hop end-to-end transmission scenario in the S-IoT, and derive the closed form expressions for average AoI of our NC-HARQ protocol through establishing a four states Markov chain. Simulation results illustrate that the NC-HARQ protocol achieves lower average AoI compare with several state-of-the-art HARQ schemes.
AB - In satellite-based internet of things (S-IoT), a noted limitation is the non-trivial propagation delay due to the long distances. Hence, to support emergent real-time IoT applications, where information must be transmitted with short end-to-end latency, the traditional hybrid automatic repeat request (HARQ) strategies in terrestrial network are not fit anymore because the reliable feedback transmission has low efficiency in S-IoT. In this paper, we propose a network code HARQ (NC-HARQ) transmission protocol combined with the concept of information timeliness, i.e., age of information (AoI) to realize limited/no feedback multi-hop transmission in S-IoT. We consider a two-hop end-to-end transmission scenario in the S-IoT, and derive the closed form expressions for average AoI of our NC-HARQ protocol through establishing a four states Markov chain. Simulation results illustrate that the NC-HARQ protocol achieves lower average AoI compare with several state-of-the-art HARQ schemes.
KW - Hybrid automatic repeat request
KW - Markov chain
KW - Multi-hop
KW - Satellite-based internet of things
KW - Timeliness
UR - https://www.scopus.com/pages/publications/85119350944
U2 - 10.1109/WCNC49053.2021.9417388
DO - 10.1109/WCNC49053.2021.9417388
M3 - 会议稿件
AN - SCOPUS:85119350944
T3 - IEEE Wireless Communications and Networking Conference, WCNC
BT - 2021 IEEE Wireless Communications and Networking Conference, WCNC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE Wireless Communications and Networking Conference, WCNC 2021
Y2 - 29 March 2021 through 1 April 2021
ER -