Single Antenna Coexistence via Dynamic Path Selection
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Solution Overview
Problem
The coexistence of WLAN and Bluetooth wireless communication services sharing a single antenna leads to interference issues due to their simultaneous operation in the same frequency band, resulting in reduced WLAN throughput and communication conflicts.
Innovation Solution
A system comprising a wireless communications chipset and a path selection circuit that dynamically connects each module to the antenna via different transceiving paths based on signal statuses, minimizing signal loss and interference by selectively enabling ports for transmission or reception, thereby optimizing the coexistence of multiple wireless communication services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If WLAN and Bluetooth modules share a single antenna to reduce cost and component count, then device cost and complexity are reduced, but interference between the two modules occurs due to simultaneous operation in the same frequency band
Solution Approach 1:
The patent implements dynamic switching between WLAN and Bluetooth modules using a control unit that monitors transmission states and selectively connects either module to the shared antenna through switching circuits. This dynamic time-division multiplexing allows both modules to share the single antenna without simultaneous operation conflicts, resolving the interference issue while maintaining cost benefits
Solution Approach 2:
The patent introduces a control unit and switching circuits as intermediary components between the WLAN/Bluetooth modules and the shared antenna. These intermediaries manage the connection state, enabling selective activation of either module based on transmission requirements, thereby preventing direct interference while maintaining single-antenna architecture
2Adaptability or versatility
If WLAN and Bluetooth modules operate simultaneously on the same frequency band, then communication functionality is enhanced, but signal interference occurs reducing WLAN throughput
Solution Approach 1:
The patent implements periodic time-division multiplexing where the control unit alternates between WLAN and Bluetooth operations in structured time slots. During WLAN transmission periods, Bluetooth is muted, and vice versa, creating periodic operational cycles that prevent continuous interference while maintaining both communication functionalities
Solution Approach 2:
The control unit performs preliminary detection of transmission states and proactively mutes one module before interference can occur. By anticipating potential conflicts and preemptively switching connections, the system prevents throughput degradation before it happens while preserving both communication capabilities
3Object-affected harmful factors
If the single antenna is switched between WLAN and Bluetooth in time slots, then interference is avoided, but WLAN ACK messages may be blocked when Bluetooth requires real-time transmission
Solution Approach 1:
The control unit implements feedback mechanisms that monitor both WLAN and Bluetooth transmission states in real-time. When WLAN requires acknowledgment transmission and Bluetooth is idle, the system dynamically switches the antenna connection to WLAN to ensure reliable ACK delivery, using feedback from both modules' operational states to make switching decisions
Data Source
AI summary
A system for the coexistence between a plurality of wireless communications modules sharing single antenna is provided. A wireless communications chipset includes a first wireless communications module configured to transmit or receive first wireless communications signals, and a second wireless communications module configured to transmit or receive second wireless communications signals. A path selection circuit is configured to connect the first wireless communications module to the antenna via a first transceiving path or a second transceiving path for transmitting and receiving the first wireless signals according to transceiving statuses of the first wireless signals and the second wireless signals.