Multi-SIM Terminal Protocol Processing for Power Reduction
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Solution Overview
Problem
Multi-SIM terminals consume excessive battery power due to repeated frequency scanning and measurement for multiple subscriber identification cards, and experience network confusion when radio communication channels are unexpectedly released during calls, causing the base station to lose track of remaining cards.
Innovation Solution
A protocol processing method and apparatus for multi-SIM terminals that determine if all subscriber identification cards are associated with the same base station, allowing sharing of frequency scanning and measurement results among them to reduce power consumption and prevent channel release messages from being sent to the base station, thereby avoiding network confusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency scanning and measurement are conducted repeatedly for each subscriber identification card, then each card can be registered in the base station, but battery power consumption increases significantly
Solution Approach 1:
The patent merges the frequency scanning and measurement operations for multiple subscriber identification cards into a single shared process. When multiple SIM cards are associated with the same base station, the terminal performs frequency scanning once and shares the results among all SIM cards, eliminating redundant scanning operations and reducing power consumption while ensuring reliable registration.
Solution Approach 2:
The patent implements preliminary frequency scanning and measurement before associating multiple SIM cards with a base station. The terminal performs frequency scanning first, stores the results, and then reuses these results for subsequent SIM card registrations, avoiding repeated scanning and reducing overall power consumption.
2Productivity
If radio communication channels are released for remaining subscriber identification cards during a call, then the radio frequency unit can be used for the call, but network confusion occurs as the base station loses track of the cards
Solution Approach 1:
The patent implements a feedback mechanism where the terminal sends channel release messages to the base station before releasing radio communication channels for non-active SIM cards. This feedback informs the base station that the channels are being released, preventing the base station from losing track of the SIM cards and avoiding network confusion while allowing the RF unit to be reused.
Solution Approach 2:
The patent applies preliminary anti-action by sending channel release messages to the base station before actually releasing the radio communication channels. This preemptive notification prevents the base station from attempting to use channels that are about to be released, thereby preventing network confusion and maintaining reliable tracking.
Data Source
AI summary
A protocol processing method and apparatus are disclosed for a multi-SIM terminal holding multiple subscriber identification cards. The method includes: determining whether all the subscriber identification cards are associated with the same base station (e.g., a Public Land Mobile Network); and conducting, when all the subscriber identification cards are associated with the same base station, frequency scanning and measurement for a selected one of the subscriber identification cards, and sharing the results of frequency scanning and measurement with all the subscriber identification cards. Hence, the multi-SIM terminal may reduce battery power consumption without repeated frequency scanning and measurement for multiple subscriber identification cards.