Method and apparatus for optimizing CBS service in a multiple SIM environment

摘要

In a communication device having multiple subscriber identification modules (SIMs), the processing of cell broadcast service (CBS) messages is optimized. A geographic scope of an incoming CBS message is determined. If all SIMs belong to the determined geographic scope, the message is only received and processed by a single one of the SIMs.

主权项

1. A method for handling cell broadcast service (CBS) messages comprising:
determining, in a communication device, whether a first subscriber identification module (SIM) and a second SIM in the communication device have communication established in a same public land mobile network (PLMN); determining a geographic scope associated with a received CBS message, the geographic scope indicating a message coverage including at least one cell; instructing a selected one of the first SIM and the second SIM to monitor and process the CBS message when the first SIM and the second SIM have the communication established in the determined geographic scope associated with the received CBS message; and instructing a remaining one of the first SIM and the second SIM not to monitor and process the CBS message, wherein the selected one of the first SIM and the second SIM instructed to monitor the CBS message is the first SIM or second SIM with a better discontinuous reception (DRX) performance;
wherein the SIM with the better performance further comprises: determining a first value of a first interval between wakeup periods or a first value of a first power consumption during a first DRX performance of the first SIM; determining a second value of a second interval between wakeup periods or a second value of a second power consumption of a second DRX performance of the second SIM; and determining which one of the first value or the second value is greater or consumes less power;
wherein the selected one of the first SIM and the second SIM comprises the one corresponding to the determined one of the first value or the second value that is greater or consumes less power.