Patent ID: 8396979
Filing Date: 2013-03-12
Classification: H04L

Abstract:
1. A communication apparatus comprising: a network interface unit that is used to connect the communication apparatus and a Universal Plug and Play (UPnP) network; and a control unit that (a) controls the communication apparatus to transmit image data to an external device, (b) controls the communication apparatus to transmit, to a dynamic host configuration protocol (DHCP) server, a lease update request for updating a lease period of an internet protocol (IP) address assigned by the DHCP server if the communication apparatus receives a BYEBYE message used in the UPnP network, and (c) changes the IP address assigned by the DHCP server to a new IP address generated in the communication apparatus if the communication apparatus fails to receive an acknowledgement of the lease update request and transmission of the image data is ended.