Patent ID: 9603181
Date: 2017-03-21
CPC Classifications: H04L,H04W

Claim:
1. A communication control method in a user terminal, comprising: storing a radio resource control (RRC) connection establishment procedure log about a failure of an RRC connection establishment procedure with a network, wherein the RRC connection establishment procedure is a procedure performed by the user terminal in a RRC idle state; storing a Minimization of Drive Test (MDT) measurement log about a measurement result of a radio environment measurement performed in the RRC idle state; transmitting first notification information together with second notification information to the network in case that the user terminal stores the RRC connection establishment procedure log and the MDT measurement log, wherein the first notification information indicates that the user terminal has stored the RRC connection establishment procedure log and the second notification information indicates that the user terminal has stored the MDT measurement log; timing an elapsed time from an occurrence time point of the failure of RRC connection establishment procedure; receiving a transmission request from the network, the transmission request requesting a transmission of the RRC connection establishment procedure log; and transmitting the RRC connection establishment procedure log to the network in response to receiving the transmission request, wherein the RRC connection establishment procedure log includes elapsed time information indicating the elapsed time.