標題: PSFCS: Robust Emergency Communications Supporting High Mobility Based on WiMAX MMR Networks
作者: Jia, Wen-Kang
Chen, Chia-Yao
Chen, Yaw-Chung
資訊工程學系
Department of Computer Science
公開日期: 2014
摘要: Nowadays public safety networks are widely deployed to support highly reliable wireless communications in case of emergency. The adoption of standardized systems such as WiMAX for emergency communications represents a significant advance in the off-the-shelf technologies for error detection and error correction. Since it is difficult to fully eliminate the Doppler effect under high speed moving environment, we propose an enhanced CRC-based error correction scheme that carries as much extra segmented frame Check Sequence (FCS) information as subblocks of emergency multicast/broadcast service (MBS) frame, called progressive and selective frame check sequence (PSFCS). In a mobile multihop relay (MMR) environment, a high-mobility mobile station might receive an emergency MBS frame more than once, so the PSFCS could be cross-referenced by duplicated frames received. Therefore the PSFCS achieves a significant performance improvement over the legacy FCS scheme in terms of error detection and correction of emergency MBS frames in a WiMAX MMR network operating in transparent mode. The experimental results show that the goodput and utilization of high-mobility mobile stations can be improved remarkably.
URI: http://hdl.handle.net/11536/24313
http://dx.doi.org/10.1155/2014/254753
ISSN: 1550-1329
DOI: 10.1155/2014/254753
期刊: INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS
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