In this paper, we study the information freshness on covert communication in the Internet of Things (IoT) networks. The freshness of information is characterized by a recently introduced metric, termed as age of information (AoI). Specifically, without a feedback channel, each packet generated at the transmitter is only allowed to be transmitted during one time slot no matter whether it is successfully decoded at the receiver. In this case, the average AoI at the receiver and the average probability of error detection at the warden are derived. Then, the transmit power is optimized to minimize the AoI while guaranteeing the covertness requirement. On the other hand, with a perfect feedback channel, packet re-transmission is adopted to make the information fresh enough. The average AoI and the average probability of error detection are analyzed. Then, the transmit power is also optimized in this case. Simulation results reveal that the proposed scheme can minimize average AoI under the requirement of covertness, and the case using re-transmission with feedback achieves a lower AoI under the same requirement of covertness.
|Title of host publication||ICC 2022 - IEEE International Conference on Communications|
|Number of pages||6|
|Publication status||Published - 2022|
|Event||ICC 2022 - IEEE International Conference on Communications - Seoul, Korea, Republic of|
Duration: 16 May 2022 → 20 May 2022
|Name||IEEE International Conference on Communications|
|Conference||ICC 2022 - IEEE International Conference on Communications|
|Period||16/05/22 → 20/05/22|
Bibliographical noteFunding Information:
VII. ACKNOWLEDGEMENT This work was supported in part by the National Natural Science Foundation of China under grant 61901328, 61971337; in part by the National Natural Science Foundation for Distinguished Young Scholar 61825104; in part by the Fundamental Research Funds for the Central Universities under grant XJS210109; in part by Young Talent fund of University Association for Science and Technology in Shaanx-i, China under grant 20210111; in part by National Key Research and Development Program of China under grant 2021YFC2203503.
© 2022 IEEE.
- Covert wireless communications
- Internet of Things
- age of information
- power optimization