Optimizing Information Freshness in Wireless Networks Under General Interference Constraints
© 1993-2012 IEEE. Age of information (AoI) is a recently proposed metric for measuring information freshness. AoI measures the time that elapsed since the last received update was generated. We consider the problem of minimizing average and peak AoI in a wireless networks, consisting of a set of sou...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Institute of Electrical and Electronics Engineers (IEEE)
2021
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| Online Access: | https://hdl.handle.net/1721.1/136591 |
| _version_ | 1811087599168651264 |
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| author | Talak, Rajat Karaman, Sertac Modiano, Eytan |
| author_facet | Talak, Rajat Karaman, Sertac Modiano, Eytan |
| author_sort | Talak, Rajat |
| collection | MIT |
| description | © 1993-2012 IEEE. Age of information (AoI) is a recently proposed metric for measuring information freshness. AoI measures the time that elapsed since the last received update was generated. We consider the problem of minimizing average and peak AoI in a wireless networks, consisting of a set of source-destination links, under general interference constraints. When fresh information is always available for transmission, we show that a stationary scheduling policy is peak age optimal. We also prove that this policy achieves average age that is within a factor of two of the optimal average age. In the case where fresh information is not always available, and packet/information generation rate has to be controlled along with scheduling links for transmission, we prove an important separation principle: The optimal scheduling policy can be designed assuming fresh information, and independently, the packet generation rate control can be done by ignoring interference. Peak and average AoI for discrete time G/Ber/1 queue is analyzed for the first time, which may be of independent interest. |
| first_indexed | 2024-09-23T13:48:39Z |
| format | Article |
| id | mit-1721.1/136591 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:48:39Z |
| publishDate | 2021 |
| publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| record_format | dspace |
| spelling | mit-1721.1/1365912021-10-28T03:47:51Z Optimizing Information Freshness in Wireless Networks Under General Interference Constraints Talak, Rajat Karaman, Sertac Modiano, Eytan © 1993-2012 IEEE. Age of information (AoI) is a recently proposed metric for measuring information freshness. AoI measures the time that elapsed since the last received update was generated. We consider the problem of minimizing average and peak AoI in a wireless networks, consisting of a set of source-destination links, under general interference constraints. When fresh information is always available for transmission, we show that a stationary scheduling policy is peak age optimal. We also prove that this policy achieves average age that is within a factor of two of the optimal average age. In the case where fresh information is not always available, and packet/information generation rate has to be controlled along with scheduling links for transmission, we prove an important separation principle: The optimal scheduling policy can be designed assuming fresh information, and independently, the packet generation rate control can be done by ignoring interference. Peak and average AoI for discrete time G/Ber/1 queue is analyzed for the first time, which may be of independent interest. 2021-10-27T20:36:09Z 2021-10-27T20:36:09Z 2020 2021-04-30T17:47:29Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/136591 en 10.1109/TNET.2019.2946481 Networking, IEEE-ACM Transactions on Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Institute of Electrical and Electronics Engineers (IEEE) arXiv |
| spellingShingle | Talak, Rajat Karaman, Sertac Modiano, Eytan Optimizing Information Freshness in Wireless Networks Under General Interference Constraints |
| title | Optimizing Information Freshness in Wireless Networks Under General Interference Constraints |
| title_full | Optimizing Information Freshness in Wireless Networks Under General Interference Constraints |
| title_fullStr | Optimizing Information Freshness in Wireless Networks Under General Interference Constraints |
| title_full_unstemmed | Optimizing Information Freshness in Wireless Networks Under General Interference Constraints |
| title_short | Optimizing Information Freshness in Wireless Networks Under General Interference Constraints |
| title_sort | optimizing information freshness in wireless networks under general interference constraints |
| url | https://hdl.handle.net/1721.1/136591 |
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