Dynamic Band Capability Management for DSDA Interference
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Solution Overview
Problem
Dual SIM Dual Active (DSDA) capable user equipment (UE) experiences significant interference between two Radio Access Networks (RANs) operating on the same or different frequency bands, affecting receiver performance and network coverage.
Innovation Solution
A method for dynamically managing band capability in DSDA-capable UE, where the UE identifies conflicting RF channels and dynamically adjusts its band configuration by disabling interfering bands, using Radio Resource Control (RRC) messages to release resources and re-establish connections on non-conflicting channels, allowing for flexible use of available frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE uses multiple RF channels simultaneously for dual SIM dual active operation, then the network coverage and service continuity are improved, but the interference between radio interfaces increases and receiver performance deteriorates
Solution Approach 1:
The patent implements dynamic band capability management where the UE can adjust its band configuration in real-time based on current operational conditions. The UE determines whether to enable or disable specific bands for the second radio interface based on interference conditions, allowing the system to adapt between using multiple bands for coverage and reducing bands for interference avoidance.
Solution Approach 2:
The patent changes the operational parameters of the radio interfaces by dynamically adjusting band capability. The UE modifies which frequency bands are active for each radio interface based on detected interference conditions, handover events, and service requirements, thereby optimizing the balance between coverage and interference.
2Area of stationary object
If the UE operates both radio interfaces in the same or overlapping frequency bands, then the network coverage is enhanced, but the receiver performance and signal quality deteriorate due to mutual interference
Solution Approach 1:
The system dynamically adjusts band configuration based on real-time conditions. When handover is detected on the first radio interface or when interference is detected, the UE dynamically disables the affected band for the second radio interface, preventing receiver performance degradation while maintaining network coverage through alternative band selection.
Solution Approach 2:
The UE continuously monitors interference conditions and handover events on the first radio interface, and uses this feedback to adjust the band capability of the second radio interface. This closed-loop approach ensures that receiver performance is maintained by disabling bands that would cause or experience interference.
3Object-affected harmful factors
If the UE statically configures non-overlapping band subsets for dual SIM operation, then the interference is reduced, but the adaptability to different network conditions and handover scenarios is limited
Solution Approach 1:
The patent transitions from static band configuration to dynamic band capability management. The UE can enable or disable bands for the second radio interface based on detected handover events, interference conditions, and service requirements, providing adaptability to various network scenarios while maintaining interference reduction benefits.
Solution Approach 2:
The UE proactively disables bands for the second radio interface when handover is detected or anticipated on the first radio interface, preventing interference before it occurs. This preliminary action ensures that the UE is prepared for potential interference scenarios while maintaining flexibility to use all available bands when conditions permit.
Data Source
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AI summary
In some implementations, a method in a user equipment (UE) for dynamically managing band capacity includes communicating with a first radio access network (RAN) on a first Radio Frequency (RF) channel and a second RAN on a second RF channel, where the first RAN and the second RAN are different networks. The UE receives an indication from the first RAN (or makes a determination) to handover to a third RF channel. The UE determines that the third RF channel conflicts with the second RF channel. The UE disables an RF band including the second RF channel with the second RAN and reports updated RF Band Capabilities to one or both RANs