差異處
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| publications:2025_wn [2025/09/04 14:40] – 建立 swwang | publications:2025_wn [2025/09/14 00:33] (目前版本) – swwang | ||
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| ====== Probabilistic data generation based age-critical frameless ALOHA protocol in wireless networks ====== | ====== Probabilistic data generation based age-critical frameless ALOHA protocol in wireless networks ====== | ||
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| + | ===== Abstract ===== | ||
| + | Multiple access control (MAC) protocols allow wireless devices to access a common | ||
| + | radio channel. Slotted ALOHA is a well-known MAC protocol employed in wireless | ||
| + | networks due to its several advantages. Frameless ALOHA (FA) is a variant of the | ||
| + | slotted ALOHA in which multiple devices send their data to a base station with equal | ||
| + | probability on a channel, and the base station decodes data with successive interference | ||
| + | cancellation. Age of information (AoI) is a critical performance metric representing the | ||
| + | time elapsed since the latest data that reached its destination was generated at its | ||
| + | sender. Age-Critical FA (ACFA), derived from FA, prohibits the transmission of those | ||
| + | devices that successfully recover data in the last frame, such that the average AoI | ||
| + | (AAoI) is reduced. Except for those prohibited devices, other devices access a frame by | ||
| + | sampling/ | ||
| + | frame. However, it is unnecessary for all the other devices to access frames because | ||
| + | letting a mere part of them attend frame access can scatter traffic more flexibly at | ||
| + | different times and reduce energy consumption due to less data generation. Thus, this | ||
| + | paper studies a modified age-critical frameless ALOHA, called Probabilistic Data | ||
| + | Generation based ACFA (PDG-ACFA), in which a frame access probability is | ||
| + | employed to determine whether a device samples and generates data. An analysis | ||
| + | validated through simulations is conducted to evaluate the performance of PDG-ACFA. | ||
| + | Numerical results show that the PDG-ACFA yields a lower AAoI under the constraint | ||
| + | on mean energy consumption, | ||
