DT-Talkie: Interactive Voice Messaging for Heterogeneous Groups in Delay-Tolerant Networks

Walkie-talkie kind of communication has been gaining attention as a service in cellular networks. Traditional walkie-talkie like services require network infrastructure for its operation. While infrastructure-less operation in mobile ad-hoc networks has been explored in the past, such approaches attempt to establish an end-to-end path for communications, which may be unstable and exhibit bad performance over multiple hops; and often the node density may be insufficient to establish such paths in the first place. In this demo, we apply the concept of asynchronous message passing using delay-tolerant networking to audio messages which get recorded and then transmitted via store-carry-and-forward from the source to the destination. We present an implementation of the DT-Talkie on the Nokia Internet tablets, leveraging the DTN reference implementation developed in the concept of the DTN Research Group.