TY - JOUR
T1 - Adaptive Redundancy CRDSA in UAV-LEO Satellite Covert Communication Networks
AU - Song, Zhe
AU - Zhang, Xuyang
AU - Wang, Shuai
AU - Jin, Xin
AU - Pan, Gaofeng
AU - An, Jianping
N1 - Publisher Copyright:
© 1972-2012 IEEE.
PY - 2026
Y1 - 2026
N2 - With the rapid development of integrated air-space-ground networks, ensuring secure and covert access for uncrewed aerial vehicles (UAVs) to low Earth orbit (LEO) satellite constellations has become a critical challenge. This paper proposes the novel adaptive redundancy contention resolution diversity slotted ALOHA (AR-CRDSA) scheme to provide reliable and covert communication for UAV users. The core of the scheme involves a dynamic pairing strategy that conceals a low-power covert user (CU) transmission under the signal of a high-power legitimate user (LU), thereby shielding it from detection by adversarial reconnaissance satellites. A key innovation is the departure from transmitting identical packet replicas; instead, the AR-CRDSA protocol sends two distinct yet complementary packet versions to adapt to fluctuating channel conditions. This adaptive mechanism, combined with multi-satellite selection diversity and an iterative interference cancellation process, is shown through extensive simulations to significantly enhance the effective covert throughput and overall system reliability when compared to traditional random access protocols.
AB - With the rapid development of integrated air-space-ground networks, ensuring secure and covert access for uncrewed aerial vehicles (UAVs) to low Earth orbit (LEO) satellite constellations has become a critical challenge. This paper proposes the novel adaptive redundancy contention resolution diversity slotted ALOHA (AR-CRDSA) scheme to provide reliable and covert communication for UAV users. The core of the scheme involves a dynamic pairing strategy that conceals a low-power covert user (CU) transmission under the signal of a high-power legitimate user (LU), thereby shielding it from detection by adversarial reconnaissance satellites. A key innovation is the departure from transmitting identical packet replicas; instead, the AR-CRDSA protocol sends two distinct yet complementary packet versions to adapt to fluctuating channel conditions. This adaptive mechanism, combined with multi-satellite selection diversity and an iterative interference cancellation process, is shown through extensive simulations to significantly enhance the effective covert throughput and overall system reliability when compared to traditional random access protocols.
KW - UAV-LEO satellite networks
KW - contention resolution diversity slotted ALOHA
KW - covert communication
KW - random access
UR - https://www.scopus.com/pages/publications/105031852788
U2 - 10.1109/TCOMM.2026.3668167
DO - 10.1109/TCOMM.2026.3668167
M3 - Article
AN - SCOPUS:105031852788
SN - 1558-0857
VL - 74
SP - 5879
EP - 5892
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
ER -