METHOD OF TRANSMITTING AND RECEIVING SYSTEM INFORMATION IN THE MOBILE COMMUNICATION SYSTEM

摘要

A method of transmitting and receiving changed system information between a User Equipment (UE) and an evolved NodeB (eNB) whose Radio Resource Control (RRC) layers are connected is provided. When a UE connected with an eNB is informed that system information is changed and informed of partial system information by the eNB through a previously set Dedicated Control Channel (DCCH), the UE sets a channel of a lower layer, i.e., Physical (PHY)/Media Access Control (MAC)/Radio Link Control (RLC) layer, as a Dynamic Broadcast Control Channel (DBCCH):Downlink-Shared Channel (DL-SCH) to receive changed system information and receives the entire changed system information. Then, the UE sets an L1 parameter and a channel of L1/L2, which is a lower layer, using the received information and continuously performs data communication and a Discontinuous Reception (DRx) operation. Since it is possible to recognize that system information is changed using a DCCH, the methods can reduce delay time resulting from unnecessary channel setting and also power consumed by periodically demodulating a channel.