Abstract: The DTNs construct a new platform for the future network applications, but nothing has been done for the research to deploy the Web servers which can provide service differentiation on DTNs. This paper designed a DTN Web server supporting differentiated service, and implemented adaptive control-based proportional delay differentiated service. Dynamically the adaptive controller can calculate and adjust the number of service threads in Web server for different types of clients according to the pre-specified delay differentiation parameters. Simulation results demonstrate that proportional delay differentiation can be achieved on the DTN Web server even under dynamic workloads, different workload distributions and varying references.

Key words: DTNs,Web servers,Adaptive control,Proportional delay differentiated service