WATM operation optimization based on effect of FEC code rate and ARQ retransmission

Research output: Journal Publications and ReviewsRGC 22 - Publication in policy or professional journal

3 Scopus Citations
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Original languageEnglish
Pages (from-to)2542-2546
Journal / PublicationIEEE Vehicular Technology Conference
Publication statusPublished - 1998
Externally publishedYes


TitleProceedings of the 1998 48th IEEE Vehicular Technology Conference, VTC'98. Part 3 (of 3)
CityOttawa, Can
Period18 - 21 May 1998


This paper applies a new methodology to different coding schemes for WATM efficiency evaluation. This methodology is based on the separation of Error Based Efficiency (EBE), which is the ratio between the mean raw data rate and the raw data rate plus all overheads associated with error corrections and retransmission of erroneous blocks of data, from Queuing Based Efficiency (QBE), which is the ratio between the error free data rate and the overall channel capacity. We compare between the efficiency of convolutional coding (in the case of binary transmission and high level modulation transmission) and Turbo coding. We show that under most value of Signal to Noise Ratio (SNR), Turbo coding is the most efficient. We also provide means to support optimal adaptive setting of the code rate and demonstrate the improvement gained by implementing adaptive Forward Error Correction code rate. We further demonstrate that, for certain realistic SNR conditions, the wastage due to retransmissions can be very high.