Timely Status Updates in Slotted ALOHA Networks With Energy Harvesting
arxiv(2024)
摘要
We investigate the age of information (AoI) in a scenario where
energy-harvesting devices send status updates to a gateway following the
slotted ALOHA protocol and receive no feedback. We let the devices adjust the
transmission probabilities based on their current battery level. Using a
Markovian analysis, we derive analytically the average AoI. We further provide
an approximate analysis for accurate and easy-to-compute approximations of both
the average AoI and the age-violation probability (AVP), i.e., the probability
that the AoI exceeds a given threshold. We also analyze the average throughput.
Via numerical results, we investigate two baseline strategies: transmit a new
update whenever possible to exploit every opportunity to reduce the AoI, and
transmit only when sufficient energy is available to increase the chance of
successful decoding. The two strategies are beneficial for low and high
update-generation rates, respectively. We show that an optimized policy that
balances the two strategies outperforms them significantly in terms of both AoI
metrics and throughput. Finally, we show the benefit of decoding multiple
packets in a slot using successive interference cancellation and adapting the
transmission probability based on both the current battery level and the time
elapsed since the last transmission.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要