# Packet-Forwarding Algorithm in DTN Based on the Pheromone of Destination Node
## 3 The Model of Pheromone and Community
### Community Model Based on Pheromone
#### 3.3.1 Detailed Description of Community Construction Algorithm
The experimental results show that the proposed packet-forwarding algorithm based on the pheromone of the core node has a low forwarding delay and a high delivery ratio when the community structure is relatively stable. The simulation results also show that the overhead ratio of FABP is higher than that of bubble. Packet-forwarding efficiency will be decreased with an increase in node mobility. Therefore, reducing the overhead ratio and adopting the algorithm to high-mobility nodes are included in our future works. This work is supported by the National Natural Science Foundation of China under Grant Nos. 61572261 and 61300239, the Natural Science Foundation of Jiangsu Province under Grant No. BK20150868, the China Postdoctoral Science Foundation funded project under Grant No. 2014M551635, the Jiangsu Planned Projects for Postdoctoral Research Funds under Grant No.1302085B, the Open Fund for the Key Laboratory for Traffic and Transportation Security of Jiangsu Province under Grant No. TTS201502, and the Major Scientific Research Project of Higher Learning Institution of Henan Province under Grant No. 15A520051. [PERSON] mainly designed the research scheme and wrote the paper. [PERSON] supervised the work. [PERSON] performed the research and wrote the paper. [PERSON] obtained and analyzed the data. All authors have read and approved the final manuscript. The authors declare no conflict of interest. ## References

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