Patent ID: 7668174
Filing Date: 2010-02-23
Classification: H04L,H04W

Abstract:
1. In a Mobile Node supporting Mobile IP, a method of registering with a Home Agent, comprising: composing a registration request, the registration request having a home address field including an IP address previously assigned to the Mobile Node and having a lifetime field including a lifetime value, wherein the IP address is a home address of the Mobile Node; appending an extension to the registration request, the extension indicating that the Mobile Node requests use of the IP address previously assigned to the Mobile Node as the home address of the Mobile Node for an additional period of time; sending the registration request to a Home Agent associated with the Mobile Node; and receiving a registration reply from the Home Agent indicating whether a lease on the IP address previously assigned to the Mobile Node has been granted by the Home Agent for an additional period of time; wherein the extension to the registration request includes a value and indicates that the Mobile Node requests use of the IP address previously assigned to the Mobile Node for a period of time equal to the value specified in the extension to the registration request, wherein the value is independent of the lifetime value specified in the lifetime field of the registration request.