Efficient ARQ error control strategies with adaptive packet length for mobile radio networks

TitleEfficient ARQ error control strategies with adaptive packet length for mobile radio networks
Publication TypeConference Paper
Year of Publication1998
AuthorsAnnamalai, A., and V. K. Bhargava
Conference NameUniversal Personal Communications, 1998. ICUPC '98. IEEE 1998 International Conference on
Pagination1247 -1251 vol.2
Date Publishedoct.
Keywordsacknowledgment messages, adaptive packet length, adaptive system, adaptive systems, Algorithms, ARQ protocols, automatic repeat request, channel conditions, channel state information, channel state sensing, efficient ARQ error control, go-back-N, land mobile radio, mobile radio networks, observation interval, packet radio networks, parameter estimation, protocols, selective-repeat, slowly varying mobile radio channel, stop-and-wait, telecommunication channels, throughput

The throughput of conventional ARQ protocols, such as the stop-and-wait, go-back-N and selective-repeat, can be improved by dynamically adapting the protocol packet length with the changes in channel conditions. Such an action requires a method for sensing the channel state and detecting a change in it. This paper examines four simple algorithms to implement such an adaptive system in a slowly varying mobile radio channel. It is shown that these algorithms performs remarkably well in spite of their simplicity. In particular, the algorithm based on counting the contiguous positive and/or negative acknowledgment messages provides a reliable channel state information (CSI) within only a few block transmissions, and requires the shortest observation interval among the four schemes


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