Patent ID: 8670392
Filing Date: 2014-03-11
Classification: H04W

Abstract:
1. A method for initiating communications in a User Equipment (UE) of a mobile communication system, comprising: receiving a system information transmitted from a Node B on a broadcasting channel, the system information indicating a group of information for requesting communications; selecting an information from among the group of information for requesting communications; transmitting an uplink signal corresponding to the selected information for requesting communications to the Node B; after transmitting the uplink signal, waiting for a predetermined delay duration without checking a downlink channel to determine whether a downlink signal responding to the uplink signal is received; after waiting for the delay duration, checking the downlink channel during a valid period and determining whether the downlink signal responding to the uplink signal is received from the Node B during the valid period, wherein the downlink signal includes an identifier corresponding to the transmitted uplink signal; and transmitting and receiving data when the downlink signal is received during the valid period.