Design of NAT traversal for mobile PPC applying hole punching technology

Mobile peer-to-peer communication (mobile PPC) is a mobility protocol that enables mobility with only end nodes in an IPv4 network. It is assumed that a mobile node moves between a global network and a private network in the IPv4 network during communication. In the existing mobile PPC, communication cannot be maintained when a mobile node moves if a network address translator (NAT) exists on the communication path because the IP address of the packet is translated by the NAT. This paper presents a NAT traversal scheme to solve the above-mentioned problem by applying the principle of hole punching technology to mobile PPC.