RF Resource Allocation in Dual SIM Standby Devices
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Solution Overview
Problem
Dual SIM dual standby (DSDS) devices face limitations in efficiently sharing Radio Frequency (RF) resources, leading to underutilization of network resources and poor performance due to the need for one SIM to share RF resources with another for high-priority activities, resulting in reduced availability for the first SIM during ongoing data sessions.
Innovation Solution
A method and device for efficiently sharing RF resources by determining a scaled throughput for the first SIM, calculating an RF rejection percentage based on various factors, and allocating RF resources to the second SIM based on this percentage, considering factors like network load, signal quality, and mobility conditions to prioritize high-priority activities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SIM1 shares RF resource with SIM2 for high-priority activities, then SIM2 can perform high-priority activities, but SIM1's data session performance deteriorates
Solution Approach 1:
The patent changes the parameter of RF resource allocation by introducing dynamic scaling factors based on throughput thresholds. Instead of fixed allocation, the system adjusts the rejection percentage for SIM2's requests based on SIM1's current data throughput, creating a variable allocation strategy that adapts to real-time network conditions.
Solution Approach 2:
The system implements dynamic RF resource sharing where the allocation to SIM2 changes continuously based on SIM1's data session status. The rejection percentage is adjusted dynamically according to throughput measurements, transforming a static resource allocation into a dynamic, adaptive process.
2Productivity
If RF resource is exclusively allocated to SIM1 for data session, then SIM1 maintains good data throughput, but SIM2 cannot perform high-priority activities
Solution Approach 1:
The patent applies partial action by allowing SIM2 to access RF resources only when certain conditions are met (throughput below threshold). Instead of complete exclusion or complete sharing, the system implements a partial sharing mechanism where SIM2 gets opportunistic access based on SIM1's current performance level.
Solution Approach 2:
The system implements feedback control by continuously monitoring SIM1's data throughput and adjusting RF resource allocation to SIM2 accordingly. When throughput exceeds a threshold, SIM2 is rejected; when below threshold, SIM2 is allowed access, creating a closed-loop control system.
3Adaptability or versatility
If RF resource is shared equally between SIM1 and SIM2, then both SIMs can access the network, but overall network performance deteriorates due to underutilization
Solution Approach 1:
The patent introduces asymmetric resource allocation where SIM1 and SIM2 are treated differently based on their current needs and priorities. Instead of equal sharing, the system applies different rejection percentages and access conditions to each SIM, optimizing overall network utilization while maintaining both connections.
Data Source
AI summary
Some example embodiments provide a method performed by a dual subscriber identification module (SIM) dual standby (DSDS) controller for efficiently sharing radio frequency (RF) resources in a DSDS device, the method comprising: receiving, when a data session is ongoing in a first SIM, a request from a second SIM for access to the RF resources for performing an activity at the second SIM having higher priority than the data session; determining a scaled throughput for the first SIM; determining an RF rejection percentage for the second SIM based on the scaled throughput; and providing the second SIM with access to the RF resources based on the RF rejection percentage.