Patent ID: 7701958
Filing Date: 2010-04-20
Classification: H04L,H04W

Abstract:
1. A mobile wireless communication device that uses a first address corresponding to a first network communication protocol upon commencement of a communication session with a network resource in a network supporting the first network communication protocol and a second network communication protocol, and subsequently requests a second address corresponding to the second network communication protocol if the network resource uses the second network communication protocol, wherein the second address is usable for a variable period of time that is set according to a network-determined factor; wherein the first address is an Internet Protocol version 6 (IPv6) address, and the second address is an Internet Protocol version 4 (IPv4) address; wherein the network-determined factor comprises whether the device has communication capabilities using only the second network communication protocol or with both the first network communication protocol and the second network communication protocol, wherein the period of time is greater if the device has communication capabilities using only the second network communication protocol compared to if the device has communication capabilities using both the first network communication protocol and the second network communication protocol.