Patent ID: 9265087
Filing Date: 2016-02-16
CPC Classification: H04L,H04W

Claim Text:
1. A method for transmitting and receiving a signal with a network at a user equipment in a wireless communication system, the method comprising: performing initial security activation and storing security information according to the the initial security activation; receiving security configuration information from the network; transmitting or receiving data to and from the network; receiving a connection release message for releasing a first connection from the network; and releasing the first connection with the network wherein the security information is not maintained after releasing the first connection with the network, when a security configuration maintaining indicator is not received from the network, wherein the security information is maintained for a predetermined time according to the security configuration information even after releasing the first connection with the network and the user equipment is in idle state, when the security configuration maintaining indicator is received from the network, and wherein the security information is reused for a second connection establishment with the network, when the second connection establishment starts while the security information is being maintained within the predetermined time according to the security configuration information.