Method and apparatus for synchronizing card without traffic in multi-card multi-standby mobile terminal

摘要

A method and an apparatus for synchronizing card without traffic in multi-card multi-standby mobile terminal are disclosed. The method includes: receiving, by a non-traffic card, a synchronization channel signal from an adjacent network cell according to frequency point of a synchronization channel of the adjacent network cell prestored in the non-traffic card, when a traffic card is in traffic; if the receiving of the synchronization channel signal from the adjacent network cell fails, performing, by the non-traffic card, a full-frequency network searching after the traffic of the traffic card, for receiving a synchronization channel signal from a network cell of the network cells and establishing synchronization with the network cell corresponding to the synchronization channel signal. The method and apparatus avoid communication failures caused by the out-of-synchronization of non-traffic card during the traffic (i.e. service) of the traffic card.

主权项

1. A method for synchronizing non-traffic card in multi-card multi-standby mobile terminal, the mobile terminal being in a wireless communication system and the wireless communication system including a plurality of network cells, and the mobile terminal having a single antenna, the method comprising:
when a traffic card has traffic, receiving, by a non-traffic card, a synchronization channel signal from an adjacent network cell according to a frequency point of a synchronization channel of the adjacent network cell which is pre-stored in the non-traffic card; if the receiving of the synchronization channel signal from the adjacent network cell fails, performing, by the non-traffic card, a full-frequency network search to obtain a synchronization channel signal from at least one network cell of the network cells and establishing synchronization with the at least one network cell corresponding to the obtained synchronization channel signal directly after the traffic card finishes transmitting its traffic, and the non-traffic card is no longer receiving the synchronization channel signal from the failed adjacent network cell, wherein the non-traffic card performing full-frequency network searching for receiving a synchronization channel signal from at least one network cell of the network cells comprises: measuring broadcast channel frequencies and power levels of network cells in a broadcast-channel-assignment-table of a current network cell of the traffic card; sorting the network cells corresponding to the power levels, according to power levels; and successively receiving synchronization channel signals on synchronization channels of the network cells according to sorting result of the network cells until a synchronization channel signal from a network cell of the network cells is received successfully, and establishing synchronization with the network cell for cell residence.