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In this paper, an innovative TCP flow control method is presented. An algorithm is proposed that combines RED (Random Early Detection) with TCP window adjustment to improve the network performance. Leveraging the advantages of RED and window adjustment, the algorithm demonstrates fast response and superior stability with controlled packet dropping rate, while still fully utilizing the network resource...
The air interfaces in acquiring GPS in the satellite Geo-Mobile-Radio -1 (Rel-3) (GMR-1 3G) and terrestrial 3GPP specifications are different, which raises a challenge for mobile terminals that are used in both networks. This paper discusses the algorithms and analysis of using GPS for such hybrid satellite terminals. We investigate the method of recovering the Keplerian parameters from Earth-centered-Earth-fixed...
In this paper, the performance of automatic retransmission request (ARQ) schemes at the forward link of a wireless system with long round trip delay, e.g., a land mobile satellite (LMS) system, is investigated. Two typical methods, namely conventional and chase combining ARQ schemes, are studied. By modeling the land mobile satellite channel as a hybrid Markov process, we propose an analytical model...
In this paper we compare the performances of the M-algorithm (MA) and the list Viterbi algorithm (LVA) for a concatenated coding scheme with outer cyclic redundancy code (CRC) and inner convolutional code. Even though the Viterbi algorithm (VA) performs the optimum decoding for convolutional codes, it is sub-optimum for the concatenated system. The LVA provides an ordered list of decoded bit sequences...
In this paper we evaluate the impact of tail bits on the performance of list Viterbi algorithms (LVA). The LVA provides an ordered list of decoded bit sequences. The outer cyclic redundancy check (CRC) block code, concatenated with the convolutional code, is used to select the output sequence. For the conventional Viterbi algorithm (VA), tail-biting outperforms tail bit-aided decoder with additional...
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