Dual SIM Cache Sharing for LTE Service Reliability
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Solution Overview
Problem
Conventional LTE cellular networks using single or dual SIMs face limitations in supporting data and voice services, particularly with the introduction of unlicensed spectrum schemes like CBRS, which can lead to connectivity issues and degraded quality of service.
Innovation Solution
A method for a dual SIM mobile device that shares a cache, allowing both SIMs to authenticate and connect to the network simultaneously. While one SIM receives and stores data in the cache, the other SIM can also receive and store data, enabling an application to retrieve and process cached data even when network connections become degraded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single SIM is used to support data or voice services, then device complexity is reduced, but service reliability deteriorates when network connections become degraded
Solution Approach 1:
The patent combines multiple SIM cards into a single mobile device, allowing both SIMs to be active simultaneously. This merging enables the device to maintain service reliability by switching between SIMs or using both concurrently, while the patent manages the complexity through integrated control mechanisms that unify the management of multiple SIMs under a single device framework.
2Reliability
If a dual SIM is used to support data and voice services simultaneously, then service reliability improves, but device complexity increases
Solution Approach 1:
The patent implements a universal SIM management system where a single device framework handles multiple SIM cards with different functions (data, voice, messaging). The system provides multi-functionality by allowing simultaneous operation of multiple SIMs for different services, while the unified control mechanism ensures that the added complexity is managed through a standardized interface and control architecture.
3Adaptability or versatility
If unlicensed spectrum (CBRS) is used for wireless communications, then spectrum availability improves, but connection reliability deteriorates
Solution Approach 1:
The patent implements preliminary actions by pre-configuring multiple SIM cards with different network access capabilities before service degradation occurs. The system proactively manages network connections by maintaining multiple active SIMs that can be switched to or used concurrently, preventing service degradation rather than reacting to it after it occurs.
Solution Approach 2:
The patent employs feedback mechanisms that continuously monitor network connection quality across multiple SIMs. When connection reliability deteriorates on one SIM, the system receives feedback about the degraded connection and automatically switches to or activates alternative SIMs with better connection quality, thereby maintaining overall service reliability while utilizing available spectrum resources.
Data Source
AI summary
An aspect includes a method for use with a mobile communications device comprising a plurality of subscriber identification modules sharing a cache. The method includes a first subscriber identification module authenticating with and connecting to the network, followed by a second subscriber identification module authenticating with and connecting to the network. The method also includes, while the first subscriber identification module is requesting and receiving first data from the network and storing the first data in the cache, the second identification module requesting and receiving second data from the network and storing the second data in the cache. The method further includes an application executing on the device retrieving and processing at least a portion of the first and second data stored in the cache, while at least one of the first and second subscriber identification modules is storing additional data received from the network in the cache.