Patent ID: 8223718
Filing Date: 2012-07-17
Classification: H04W

Abstract:
1. A radio terminal comprising: a communication processor configured to execute communications using an IP address with a correspondent node via a first radio base station; an IP address acquisition unit configured to acquire a new IP address at a time of handover from the first radio base station to a second radio base station, the new IP address being used for communications with the correspondent node via the second radio base station; a message transmitter-receiver configured to transmit and receive a lower layer message using a protocol of a layer lower than an IP layer to and from the second radio base station before the IP address acquisition unit acquires the new IP address; and a quality measurement unit configured to measure a radio communication quality including at least one of transmission delay and jitter in a radio communication path between the radio terminal and the second radio base station, by using the lower layer message transmitted and received by the message transmitter-receiver.