TY - GEN
T1 - On the Age of Information in CR-NOMA Assisted Status Updating Systems with Random Arrivals
AU - Sun, Yanshi
AU - Ye, Yanglin
AU - Ding, Zhiguo
AU - Zhou, Momiao
AU - Ding, Zhizhong
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - This paper aims to study the role of cognitive radio inspired non-orthogonal multiple access (CR-NOMA) in improving information freshness of status updating systems with random arrivals. Particularly, a time slotted multiuser scenario is considered, where each user transmits its status update to a receiver. Each user is allocated with a time slot. In CR-NOMA, each user can transmit signal as a primary user by using its own time slot, besides, it can also transmit signal as a secondary user by sharing the time slot of another user. Hence, more transmission opportunities are provided by CR-NOMA compared to conventional time division multiple access (TDMA) based schemes. In this paper, age of information (AoI) is utilized as the performance metric. For comparison purpose, exact expressions for the average AoIs achieved by CR-NOMA and benchmark TDMA are obtained. Numerical results are provided to validate the accuracy of the analytical results and also demonstrate the superior performance of CR-NOMA on reducing AoI. It is shown that the AoI can be significantly reduced by CR-NOMA compared to TDMA.
AB - This paper aims to study the role of cognitive radio inspired non-orthogonal multiple access (CR-NOMA) in improving information freshness of status updating systems with random arrivals. Particularly, a time slotted multiuser scenario is considered, where each user transmits its status update to a receiver. Each user is allocated with a time slot. In CR-NOMA, each user can transmit signal as a primary user by using its own time slot, besides, it can also transmit signal as a secondary user by sharing the time slot of another user. Hence, more transmission opportunities are provided by CR-NOMA compared to conventional time division multiple access (TDMA) based schemes. In this paper, age of information (AoI) is utilized as the performance metric. For comparison purpose, exact expressions for the average AoIs achieved by CR-NOMA and benchmark TDMA are obtained. Numerical results are provided to validate the accuracy of the analytical results and also demonstrate the superior performance of CR-NOMA on reducing AoI. It is shown that the AoI can be significantly reduced by CR-NOMA compared to TDMA.
KW - Age of information (AoI)
KW - information freshness
KW - Non-orthogonal multiple access (NOMA)
KW - status updates
UR - http://www.scopus.com/inward/record.url?scp=85198848983&partnerID=8YFLogxK
U2 - 10.1109/WCNC57260.2024.10571232
DO - 10.1109/WCNC57260.2024.10571232
M3 - Conference contribution
AN - SCOPUS:85198848983
T3 - IEEE Wireless Communications and Networking Conference, WCNC
BT - 2024 IEEE Wireless Communications and Networking Conference, WCNC 2024 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 25th IEEE Wireless Communications and Networking Conference, WCNC 2024
Y2 - 21 April 2024 through 24 April 2024
ER -