The Delay/Disruption Tolerant Network Working Group (DTNWG) specifies mechanisms for data communications in the presence of long delays and/or intermittent connectivity. Delay-Tolerant Networking (DTN) protocols have been the subject of extensive research and development in the Delay-Tolerant Networking Research Group (DTNRG) of the Internet Research Task Force since 2002. The key documents are the « DTN Architecture » (RFC 4838), the Bundle Protocol (RFC 5050), Licklider Transmission Protocol (RFC 5326) and convergence layers (RFC 7122, 7242). Multiple independent implementations exist for these technologies and multiple deployments in space and terrestrial environments. There is an increase interest in the commercial world for these technologies, for similar and different use cases, such as unmanned air vehicles. In this context, there is a need to update the base specifications, i.e., RFC 5050, RFC 7122, RFC 7242, RFC 6257 and RFC 6260, based on the deployment and implementation experience as well as the new use cases. Moreover, there is also a need to have standards track documents for the market. Therefore, the purpose of the working group is to document the new use cases and requirements and to update the base specifications. The group shall not endeavour to change the underlying architecture or the bundle protocol principle. Work items are: o An informational « DTN Revision Problem Statement, Use Cases, Requirements and Development Strategy » document o Updates to RFC5050, convergence layer RFCs, security(RFC6257), as standard track documents. o A registry for DTN Service Identifiers The DTNWG must reach rough consensus on the "DTN Revision Problem Statement, Use Cases, Requirements and Development Strategy" document before the working group is permitted to work on any updates to the protocol specifications. Goals and Milestones: April 2015 Submit DTN Revision Problem Statement, Use Cases, Requirements and Development Strategy document (informational) to IESG.