ICT distribution-based contact model for delay tolerant networks
Wang Haiqua · Beijing Hangkong Hangtian Daxue xuebao · 2015
Characteristics of inter contact time( ICT) are essential for delay tolerant networks( DTNs),which are beneficial to network performance analysis,routing protocol design and algorithm optimization,but existing ICT models lack general applicability. Based on the general assumptions,a reliability mathematical model was proposed,which is called ICT distribution-based contact model( IDCM),to demonstrate that the ICT between two mobile nodes was exponentially distributed and to verify that the exponential parameter of node pairs only related to the historical contact numbers and cumulative ICTs. Based on random direction( RD) mobility model dataset,random way point( RWP) mobility model dataset,Beijing taxi network dataset,pocket switch network dataset,extensive experimental simulations were conducted and comparison to parameter-aggregated exponential model was made. The simulation results show that IDCM characterizes contacts of node pairs accurately and have better accuracy than parameter-aggregated exponential model.