2020 IEEE International Symposium
on Information Theory
21-26 June 2020 • Los Angeles, California, USA
| Paper ID | N.7.3 | ||
| Paper Title | AoI Minimization in Broadcast Channels with Channel State Information | ||
| Authors | Songtao Feng, Jing Yang, PSU, United States | ||
| Session | N.7: Age of Information II | ||
| Presentation | Lecture | ||
| Track | Networking and Network Coding | ||
| Manuscript | Click here to download the manuscript | ||
| Virtual Presentation | Click here to watch in the Virtual Symposium | ||
| Abstract | In this paper, we consider a status updating system where updates are generated at a constant rate at $K$ sources and sent to the corresponding recipients through a broadcast channel. We assume that perfect channel state information (CSI) is available at the transmitter before each transmission, and the additive noise is negligible at the receivers. Under various assumptions on the number of antennas at the transmitter and the size of updates, our object is to design precoding and transmission scheduling schemes for the minimization of the summed time-average Age of Information (AoI) at the recipients. We show that when the transmitter has a single antenna, precoding is unnecessary, and the optimal policy is to update each recipient in a greedy round-robin fashion. When the transmitter has multiple antennas, updating with round-robin precoding is age-optimal. | ||
Plan Ahead
2021 IEEE International Symposium on Information Theory
11-16 July 2021 | Melbourne, Victoria, Australia
