TY - JOUR
T1 - Cooperative Lossy Communications in Unmanned Aerial Vehicle Networks
T2 - Age-of-Information with Outage Probability
AU - Lin, Wensheng
AU - Li, Lixin
AU - Yuan, Jinhong
AU - Han, Zhu
AU - Juntti, Markku
AU - Matsumoto, Tadashi
N1 - Publisher Copyright:
© 1967-2012 IEEE.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - This article analyzes the robustness and timeliness for cooperative lossy communications in unmanned aerial vehicle (UAV) networks. The analytical framework consists of two steps: 1) calculating the outage probability, and 2) characterizing the Age-of-Information (AoI) for a given outage probability. Initially, we determine the outage probability based on the Shannon's lossy source-channel separation theorem. Numerical results indicate that joint decoding reduces the outage probability, and the system can achieve higher diversity order for less stringent distortion requirement. Then, we derive a closed-form expression of the lower bound on the average AoI for the communication system where outage events are constrained to an acceptable level. Moreover, we conduct a series of simulations for verifying the lower bound on the average AoI and evaluating the impact of UAV locations on the average AoI. It is demonstrated that the lower bound is tight when the server utilization ratio is either relatively busy or idle. For the case with a relatively large outage probability, we propose an intermittent transmission scheme to refine the AoI performance without extra energy consumption. The effectiveness of the intermittent transmission scheme for reducing the average AoI is verified by both the simulations and the lower bound analysis.
AB - This article analyzes the robustness and timeliness for cooperative lossy communications in unmanned aerial vehicle (UAV) networks. The analytical framework consists of two steps: 1) calculating the outage probability, and 2) characterizing the Age-of-Information (AoI) for a given outage probability. Initially, we determine the outage probability based on the Shannon's lossy source-channel separation theorem. Numerical results indicate that joint decoding reduces the outage probability, and the system can achieve higher diversity order for less stringent distortion requirement. Then, we derive a closed-form expression of the lower bound on the average AoI for the communication system where outage events are constrained to an acceptable level. Moreover, we conduct a series of simulations for verifying the lower bound on the average AoI and evaluating the impact of UAV locations on the average AoI. It is demonstrated that the lower bound is tight when the server utilization ratio is either relatively busy or idle. For the case with a relatively large outage probability, we propose an intermittent transmission scheme to refine the AoI performance without extra energy consumption. The effectiveness of the intermittent transmission scheme for reducing the average AoI is verified by both the simulations and the lower bound analysis.
KW - Age-of-Information
KW - Unmanned aerial vehicles
KW - cooperative communications
KW - lossy communications
KW - outage probability
UR - http://www.scopus.com/inward/record.url?scp=85117780961&partnerID=8YFLogxK
U2 - 10.1109/TVT.2021.3103103
DO - 10.1109/TVT.2021.3103103
M3 - 文章
AN - SCOPUS:85117780961
SN - 0018-9545
VL - 70
SP - 10105
EP - 10120
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 10
ER -