Goodput analysis for lossy low-speed wireless networks during message segmentation

• Published in: 2021 IEEE Wireless Communications and Networking Conference (WCNC) pp. 1 - 7
• Main Author: Ikegawa, Takashi
• Format: Conference Proceeding
• Language: English
• Published: IEEE 29.03.2021
• Subjects: Conferences; goodput; lossy low-speed wireless networks; Message segmentation; payload size; Payloads; Protocols; stop-and-wait protocol; Wide area networks; Wireless networks
• ISSN: 1558-2612
• DOI: 10.1109/WCNC49053.2021.9417486

This paper derives the exact analytical form of goodput for wireless networks where packets generated from a message through a segmentation function are lost due to independent identically distributed bit errors, and these lost packets are recovered by a stop-and-wait protocol. In previous studies, packet sizes are assumed to be constant, which are payload size plus header/trailer size. However, the size of actual segmented packets is not necessarily constant. This is because the final packet in a segmented packet sequence created from a message, referred to as an edge packet, can vary in size. In a simple scenario where fixed-sized messages are transferred over a lossy and low-speed wireless network, such as a low power wide area network, we show that the goodput exhibits saw-tooth curves due to the variable-sized edge packets. Furthermore, we derive a simplified payload size to maximize goodput in which transferred packets utilize the payload most efficiently.