A Practical Routing Protocol Based on WiFi for Resources-constrained Opportunistic Networks

摘要

Opportunistic networks based on WiFi technology can be widely deployed in special area which wired network can not cover or the infrastructure of mobile telephone network is paralysed in consequence of severe earthquakes, floods, or other natural calamities. Two most important issues should be considered to guarantee message delivery in opportunistic networks: routing protocols and efficient buffer management strategy. Considering above two issues, we propose an opportunistic networks routing protocol based on WiFi (ONRWF) which aims to make up for the lack of bandwidth and buffer space. ONRWF contains delivery prediction which can decide next hop routing by comparing the prediction of future meeting time of all nodes. In the strategy of buffer management, scheduling policy aims to improve message delivery of high priority, and the proposed drop policy focuses on improving the efficiency of buffer space. Finally, a testbed is also set up to validate the ONRWF in real life. Compared with the traditional WiFi and SVSS (our previous work), experimental results demonstrate significant performance benefits in terms of message delivery for opportunistic networks based on WiFi.