Cross-Layer Design for Video Transmissions in Metro Passenger Information Systems

Author

Zhu, Li ; Yu, F. Richard ; Ning, Bin ; Tang, Tao

Author_Institution

State Key Lab. of Rail Traffic Control & Safety, Beijing Jiaotong Univ., Beijing, China

Volume

60

Issue

3

fYear

2011

fDate

3/1/2011 12:00:00 AM

Firstpage

1171

Lastpage

1181

Abstract

In metro passenger information systems (PISs), frequent train handoffs can cause severe video distortion. In this paper, we take an integrated design approach to jointly optimize application-layer parameters and handoff decisions to improve video transmission quality over PISs. We present a train-ground video communication network based on fountain codes and IEEE 802.11p for metro PISs. The metro PIS channel is modeled as a finite-sate Markov chain, and the channel-state transition probability matrix is calculated from the data that were measured in real field tests. The handoff decision and application-layer parameters adaptation problem is formulated as a stochastic semi-Markov decision process (SMDP). Minimizing the end-to-end total video distortion is the objective in our model. Simulation results show that the proposed SMDP-based optimization algorithm can significantly improve the end-to-end video transmission quality in metro PISs.

Keywords

Markov processes; channel coding; distortion; finite state machines; matrix algebra; mobility management (mobile radio); optimisation; public information systems; railway communication; video communication; wireless LAN; wireless channels; IEEE 802.11p; SMDP; application-layer parameter optimization; channel-state transition probability matrix; cross-layer design; flnite-sate Markov chain; fountain code; frequent train handoff; metro PIS channel; metro passenger information system; stochastic semiMarkov decision process; train-ground video communication network; video distortion; video transmission quality; Fountain codes; IEEE 802.11p; handoff; passenger information systems (PISs);

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2011.2107927

Filename

5703140