US 8,805,444 B2 · Multi-sim multi-standby communication terminal, and synchronization device and method thereof

Abstract

A multi-SIM multi-standby communication terminal, and a synchronization device and method thereof are provided. The synchronization method includes: searching, by the first card, for a network and camping on a first cell after the communication terminal is powered on; controlling the second card to camp on the first cell; determining, by the first card, if there is a second cell qualified for reselection based on the result of neighboring cells measurement, and if the determination result is YES, the first card reselecting the second cell; and controlling the second card to reselect the second cell after the first card camps on the second cell. This disclosure has the following advantages: the efficiency of paging information reception and neighboring cells measurement is increased, power consumption is reduced, the time for camping on and cell reselection is reduced, and the implementation of the physical layer is simplified.

Claims19

Dependent claims

A synchronization method in a multi-SIM multi-standby communication terminal, comprising:

a first card of the communication terminal camping on a first cell;
determining whether a second card of the communication terminal belongs to a same operator as the first card;
if the second card of the communication terminal does not belong to the same operator as the first card, determining whether the network number of the first cell is contained in the EHPLMN or EPLMN list of the second card, or whether the network number of the first cell is RPLMN of the second card;
if the second card of the communication terminal belongs to the same operator as the first card, or if the network number of the first cell is contained in the EHPLMN or EPLMN list of the second card, or if the network number of the first cell is RPLMN of the second card, controlling the second card to camp on the first cell with the first card;
and
if the network number of the first cell is not contained in the EHPLMN or EPLMN list of the second card, or if the network number of the first cell is not RPLMN of the second card, controlling the second card to camp on a second cell.

3 more elements

A synchronization device in a multi-SIM multi-standby communication terminal, comprising:

a determining unit, adapted to identify a first card, and to determine if there is a second card within the remaining cards which is suitable for camping on a same cell as the first card;
and
a control unit, after the first card camps on the first cell and if a second card within the remaining cards is suitable for camping on the same cell as the first card, adapted to control the second card to camp on the first cell with the first card;
wherein the determining unit determining if a second card within the remaining cards which is suitable for camping on the same cell as the first card comprises:
determining whether the second card belongs to the same operator as the first card;
and
if the second card of the communication terminal does not belong to a same operator as the first card, determining whether a network number of the first cell is contained in the EHPLMN or EPLMN list of the second card, or whether the network number of the first cell is RPLMN of the second card.

4 more elements

Dependencies are inferred from the claim text.

Multi-sim multi-standby communication terminal, and synchronization device and method thereof

Life of this patent

Multi-sim multi-standby communication terminal, and synchronization device and method thereof

Life of this patent

Abstract

Claims19