Journal on Communications ›› 2021, Vol. 42 ›› Issue (12): 109-120.doi: 10.11959/j.issn.1000-436x.2021222

• Papers • Previous Articles     Next Articles

Vehicular delay tolerant network routing algorithm based on optimized multi-period Bayesian network

Jiagao WU1,2, Yahang GUO1,2, Shenlei CAI1,2, Linfeng LIU1,2   

  1. 1 School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
    2 Jiangsu Key Laboratory of Big Data Security &Intelligent Processing, Nanjing 210023, China
  • Revised:2021-11-19 Online:2021-12-01 Published:2021-12-01
  • Supported by:
    The National Natural Science Foundation of China(61872191);The National Natural Science Foundation of China(41571389)

Abstract:

Aiming at the instability of communication link caused by the high-speed movement of vehicle nodes in vehicular delay tolerant network (VDTN), considering the characteristics of regularity and periodicity of vehicle nodes movement, a VDTN routing algorithm based on optimized multi-period Bayesian network (BN) was proposed.Firstly, a new multi-period BN model and its dynamic reward mechanism for node classification were proposed to describe the movement pattern of vehicle nodes with higher accuracy.Then, two novel time-optimal-partition algorithms of multi-period BN were proposed including binary search K2GA (BS-K2GA) algorithm and simulated annealing K2GA (SA-K2GA) algorithm, where BS-K2GA algorithm had the advantages of simplicity and efficiency, while SA-K2GA could effectively avoid falling into the local optimal solution and further optimize the performance.The simulation results show that the proposed VDTN routing algorithm based on optimized multi-period BN model can significantly improve the message delivery ratio and reduce the delivery delay.Thus, the effectiveness of the approach is validated.

Key words: vehicle delay tolerant network, Bayesian network, routing algorithm, binary search, simulated annealing

CLC Number: 

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