Quad SIM RF Chain Management for Power and Service Availability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Quad SIM mobile devices consume excessive power due to their high power consumption, leading to reduced performance and a high likelihood of subscriptions entering an out-of-service state when sharing a common RF chain for extended periods.
Innovation Solution
Implementing a method where multiple subscriptions on a quad SIM mobile device maintain active and slotted idle states on separate RF chains, allowing for efficient monitoring of pages and switching between RF chains based on data throughput and usage states to prevent out-of-service conditions, thereby optimizing hardware usage and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple subscriptions share a common RF chain to reduce device complexity and power consumption, then the number of transceivers is reduced, but subscriptions are likely to enter out-of-service state when one subscription uses the RF chain for extended periods
Solution Approach 1:
The patent segments the four subscriptions into two groups, with each group assigned to a separate RF chain. This segmentation allows simultaneous operation of multiple subscriptions on different RF chains, preventing any single subscription from monopolizing the entire RF resource and causing others to enter out-of-service state.
Solution Approach 2:
The patent implements dynamic subscription-RF chain assignment where subscriptions can be switched between RF chains based on their current state and service requirements. This dynamic allocation ensures that when one subscription occupies an RF chain for extended periods, other subscriptions can be moved to alternative RF chains, maintaining service availability.
2Reliability
If quad SIM mobile devices use multiple RF chains to support four SIM cards simultaneously, then subscription service availability is improved, but power consumption increases significantly
Solution Approach 1:
The patent segments the four subscriptions across two RF chains rather than dedicating one RF chain per subscription. This reduces the total number of active RF chains from four to two, significantly lowering power consumption while still allowing multiple subscriptions to operate simultaneously without conflict.
Solution Approach 2:
The patent employs periodic monitoring of subscription states and RF chain utilization. Subscriptions are switched between RF chains periodically or event-driven based on their activity patterns, allowing the system to consolidate RF chain usage and reduce power consumption during periods of low subscription activity.
3Use of energy by moving object
If dual SIM mobile devices configure two SIM cards to use a common RF chain to save power, then power consumption is reduced, but the device cannot support quad SIM functionality
Solution Approach 1:
The patent makes each RF chain universal by allowing it to serve multiple subscriptions over time. Each RF chain can be dynamically assigned to different subscriptions based on current service needs, enabling the two RF chains to collectively support all four SIM cards while maintaining power efficiency through shared resource utilization.
Solution Approach 2:
The patent implements dynamic subscription-RF chain assignment where subscriptions can be switched between RF chains based on their current state and service requirements. This dynamic allocation enables quad SIM functionality while maintaining power efficiency through shared resource utilization.
Data Source
AI summary
Methods, systems and devices are providing for managing quad SIM functionality on a mobile device. The method includes maintaining active in a data traffic state on a first radio frequency (RF) chain of the mobile device a first subscription of a first SIM. Also, maintaining active in a slotted idle state each of a second SIM subscription, a third SIM subscription and a fourth SIM subscription on a second RF chain of the mobile device. The slotted idle states enabling the subscriptions to monitor pages in their paging channel slots. The method may include switching the third and fourth subscriptions to the first RF chain in response to the second subscription exiting the slotted idle state. The first, subscription may operate with tune away support while the third and fourth subscriptions operate in slotted idle state together on the first RF chain.