| 摘要 |
A method of handling a registration procedure for accessing a circuit-switched (CS) service for a communication device of a wireless communication system is disclosed. The communication device operates in a network mode of operation I (NMO I), and the method comprises maintaining a packet-switched (PS) back-off timer triggered by a network of the wireless communication system, when the network is in congestion in a PS domain; and initiating the registration for the CS service with the network, before the PS back-off timer expires.
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