Method of Handling Radio Resource Control Connection Establishment during Reception of Public Warning System Message in Wireless Communication System and Communication Device Thereof

A communication device of a wireless communication system for handling radio resource control (RRC) connection establishment during reception of a public warning system (PWS) message, the communication device comprising:

• a processing means, for executing a program;
• and
• a storage unit, coupled to the processing means, for storing the program which instructs the processing means to perform the following steps:
• starting to receive the PWS message;
• determining to initiate an RRC connection establishment procedure for initiating a high priority packet-switched (PS) service during the reception of the PWS message broadcast by system information or a cell broadcast service (CBS);
• and
• determining not to initiate an RRC connection establishment procedure for initiating a PS service other than the high priority PS service during the reception of the PWS message broadcast by the system information or the CBS.

A communication device of a wireless communication system for handling radio resource control (RRC) connection establishment during reception of a public warning system (PWS) message, the communication device comprising:

• a processing means, for executing a program;
• and
• a storage unit, coupled to the processing means, for storing the program which instructs the processing means to perform the following steps:
• starting to receive the PWS message;
• determining not to initiate an RRC connection establishment procedure for initiating a low priority circuit-switched (CS) service during the reception of the PWS message broadcast by system information or a cell broadcast service (CBS);
• and
• determining to initiate an RRC connection establishment procedure for initiating a CS service other than the low priority CS service during the reception of the PWS message broadcast by the system information or the CBS.