Smartphone Applications Using Bytewalla Protocol in Delay Tolerant Network

In Android platform, the Delay Tolerant Network (DTN) service and protocol stack and these presents an implementation of it that technique is called "Bytewalla". This technique allows the use of Android phones for the physical carriage of data or information between the network nodes in which where there are no other communication between network nodes are available, for certain security issues the existing links need to be avoided or in some case the internet is blocked by a government authority like it happened in some countries eg. Arab country during the spring of 2011. This technique deals with an implementation of two applications that runs on top of Bytewalla, are addressed together with some usage scenarios and those two applications are store and forward messaging application (SFMA) and a Sentinel Surveillance health-care application (SSA). We concluded that the combination of DTN links in the wide-ranging IP-network architecture on mobile phone platform is feasible and it will make this easier to integrate DTN applications into communication-delayed areas. To best of our knowledge the implementation of the bundle protocol on the Android platform is the first in DTN application.