Coexistence Signaling Framework for Multi-Radio Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication devices with multiple RF subsystems face interference issues due to overlapping frequency bands, limiting simultaneous communication across different protocols like Bluetooth and WLAN.
Innovation Solution
Implementing a coexistence signaling framework with cross-layer partition of measurement-based coexistence modules and real-time signaling to manage and control RF operations, using techniques such as time domain arbitration and fine-resolution timing adjustments to prevent interference among RF subsystems like LTE, WLAN, Bluetooth, and NFC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple RF subsystems operate simultaneously in overlapping frequency bands, then communication versatility is improved, but interference between subsystems increases
Solution Approach 1:
The patent segments the RF subsystems into separate entities (LTE, WLAN, Bluetooth, NFC) and implements individual control mechanisms for each. The coexistence signaling framework divides the management of overlapping frequency bands into discrete controllable units, allowing independent adjustment of each subsystem to minimize interference while maintaining communication versatility.
Solution Approach 2:
The patent introduces a coexistence signaling framework as an intermediary layer between multiple RF subsystems. This framework mediates interactions by providing standardized signaling mechanisms that coordinate subsystem operations, manage resource allocation, and resolve conflicts in overlapping frequency bands without requiring direct subsystem-to-subsystem communication.
2Object-affected harmful factors
If time domain arbitration is implemented to manage RF subsystems, then interference is reduced, but processing complexity increases
Solution Approach 1:
The patent implements periodic time domain arbitration mechanisms where RF subsystems are granted access to shared frequency bands in structured time slots. This periodic scheduling approach reduces interference by ensuring that only one subsystem transmits at a time in overlapping bands, while the modular nature of the time-division framework keeps processing complexity manageable through repetition of established arbitration patterns.
3Measurement precision
If fine-resolution timing adjustments are used for coexistence signaling, then simultaneous transmission accuracy is improved, but implementation complexity increases
Solution Approach 1:
The patent employs fine-resolution timing adjustments by changing the temporal parameters of RF transmissions. The coexistence signaling framework allows dynamic modification of transmission timing, duration, and synchronization parameters to achieve precise coordination between subsystems. This parameter-based control achieves high timing accuracy while avoiding the need for complex hardware modifications.
Data Source
AI summary
A method and apparatus relate to coexistence of multiple RF subsystems on a communication device. An apparatus may include a plurality of radio frequency (RF) subsystems configured to receive or transmit communication signals; and an interface for communication between a first RF subsystem of the plurality of RF subsystems and at least a second RF subsystem of the plurality of subsystems. The first RF subsystem can be configured to generate a timing offset for a coexistence signal, the timing offset being indicative of a difference between a time of generation of a signal and the time of an event associated with the signal. The timing offset can comprise a fixed offset generated based on at least one of a reference time from a periodic interrupt or direct access of a timer; and an offset adjustment based on a distance between the apparatus and a base station associated with the first RF subsystem.