  Named Data Networking (NDN) architectural features, including multicast data
delivery, stateful forwarding, and in-network data caching, have shown promise
for applications such as video streaming and file sharing. However,
collaborative applications, requiring a multi-producer participation introduce
new NDN design challenges. In this paper, we highlight these challenges in the
context of the Network Time Protocol (NTP) and one of its most widely-used
deployments for NTP server discovery, the NTP pool project. We discuss the
design requirements for the support of NTP and NTP pool and present general
directions for the design of a time synchronization protocol over NDN, coined
Named Data Networking Time Protocol (NDNTP).
