Patent ID: 8594108
Filing Date: 2013-11-26
Classification: H04L

Abstract:
1. A communication apparatus which performs communication between a first apparatus using IPv4 and a second apparatus using IPv6, the communication apparatus comprising: an IP transmitter/receiver which transmits a message to the first apparatus and receives the message from the first apparatus; an address inquiry unit which, in response to receiving a first message for inquiring an IP address of the second apparatus from the first apparatus, transmits a second message for inquiring said IP address of the second apparatus to an address manager apparatus via the IP transmitter/receiver; and a holding unit which holds a correspondence between an IPv4 address and an IPv6 address, wherein, if the address inquiry unit receives a third message including a first IPv6 address of the second apparatus from the manager apparatus, the address inquiry unit allocates a first IPv4 address to said first IPv6 address, and wherein the holding unit holds a correspondence between said first IPv6 address and said first IPv4 address.