Antenna Switching Management for Multi-SIM TDD Synchronization
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Solution Overview
Problem
In multi-SIM wireless communication systems, concurrent transmit and receive operations across different SIMs can cause reliability issues and hardware damage due to unsynchronized Time Division Duplex (TDD) patterns, leading to overlapping antenna usage and interference.
Innovation Solution
The implementation of an antenna switching management system that determines TDD synchronization between SIMs based on frequency bands and network operators, allowing for maximized or reduced antenna switching capabilities to prevent interference by selecting appropriate antennas for each SIM's activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If concurrent transmit and receive operations are performed across different SIMs, then communication functionality is improved, but reliability deteriorates due to overlapping antenna usage and interference
Solution Approach 1:
The patent implements dynamic antenna switching that adapts the antenna configuration based on real-time TDD synchronization status between SIMs. When TDD is synchronized, the system allows concurrent transmit and receive operations; when unsynchronized, it switches to non-concurrent operations. This dynamic adjustment resolves the contradiction by making the system flexible enough to maintain reliability while preserving concurrent communication capability when safe.
Solution Approach 2:
The system changes the operational parameters of antenna usage based on TDD synchronization detection. By monitoring TDD uplink-downlink configuration between different SIMs, the system adjusts whether antennas can be used concurrently for transmit and receive operations. This parameter-based control allows the system to optimize for concurrent communication when TDD is synchronized while preventing interference when it is not.
2Productivity
If antenna switching capability is maximized for first SIM, then communication performance is improved, but interference risk increases when TDD is unsynchronized with second SIM
Solution Approach 1:
The patent implements a feedback mechanism that continuously monitors TDD synchronization status between SIMs and adjusts antenna switching capability accordingly. The system detects whether TDD uplink-downlink configurations are synchronized and uses this feedback to dynamically control the antenna switching capability for the first SIM. When TDD is unsynchronized, the feedback triggers a reduction in antenna switching capability to prevent interference, while allowing maximized capability when synchronized.
3Device complexity
If TDD synchronization is not checked, then system complexity is reduced, but harmful interference occurs between concurrent transmit and receive operations
Solution Approach 1:
The patent applies preliminary action by checking TDD synchronization status before enabling concurrent transmit and receive operations on different SIMs. The system proactively detects whether TDD uplink-downlink configurations are synchronized between SIMs and makes advance decisions about antenna switching capability. This preliminary check prevents harmful interference from occurring in the first place, rather than reacting after interference occurs.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may establish, using a first frequency band, a first communication connection on a first subscriber identity module (SIM). The UE may establish, using a second frequency band, a second communication connection on a second SIM in a multi-SIM dual receive mode that includes the first SIM and the second SIM having concurrent activity. The UE may switch from a first antenna to a second antenna for the first SIM in accordance with an antenna switching capability that is based at least in part on whether the first communication connection and the second communication connection are time division duplex (TDD) synchronized. The UE may transmit one or more communications associated with the first SIM using the second antenna. Numerous other aspects are described.