Maximizing Stable Throughput in Age of Information-Based Cognitive Radio

Mohamed, Ali Gaber; Gamal, Mahmoud

doi:10.1109/rtc56148.2022.9945059

Cited by 1 publication

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They used AoI to measure content timeliness and proposed an optimized AoI-aware content update scheme. Mohammed et al conducted a study on cognitive radio, focusing on the time division multiple access (TDMA) strategy, where only one user can transmit in a time slot, and the NOMA strategy, where multiple users can transmit in a single time slot [27]. The objective was to maximize throughput while adhering to the constraints of AoI.…”

Section: Related Workmentioning

confidence: 99%

“…Bringing Equation (27) into Equation ( 22), according to Loynes' theorem, the first dominant system is stabilized when λ 1 < μ1,B and λ 2 < μ2,B hold simultaneously. The stabilized transmission region of the first dominant system under strategy B can be found in Equation (26) See Appendix A.2.…”

Section: Strategy B (Serial Interference Cancellation) Stabilization ...mentioning

confidence: 99%

See 1 more Smart Citation

Optimizing the Timeliness of Hybrid OFDMA-NOMA Sensor Networks with Stability Constraints

Wang,

Dong,

Pan

2024

Electronics

View full text Add to dashboard Cite

In this paper, we analyze the timeliness of a multi-user system in terms of the age of information (AoI) and the corresponding stability region in which the packet rates of users lead to finite queue lengths. Specifically, we consider a hybrid OFDMA-NOMA system where the users are partitioned into several groups. While users in each group share the same resource block using non-orthogonal multiple access (NOMA), different groups access the fading channel using orthogonal frequency division multiple access (OFDMA). For this system, we consider three decoding schemes at the service terminals: interfering decoding, which treats signals from other users as interference; serial interference cancellation, which removes signals from other users once they have been decoded; and the enhanced SIC strategy, where the receiver attempts to decode for another user if decoding for a previous user fails. We present the average AoI for each of the three decoding schemes in closed form. Under the constraint of the stable region, we find the minimum AoI of each decoding scheme efficiently. The numerical results show that by optionally choosing the decoding scheme and transmission rate, the hybrid OFDMA-NOMA outperforms conventional OFDMA in terms of both system timeliness and stability.

show abstract

Section: Related Workmentioning

confidence: 99%

Section: Strategy B (Serial Interference Cancellation) Stabilization ...mentioning

confidence: 99%