Radio Communication Device Interference Mitigation via Time-Division Scheduling
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Solution Overview
Problem
Mobile communication terminals face interference issues when operating multiple radio access technologies simultaneously, such as LTE and Bluetooth or WLAN, due to overlapping frequency bands, which affects coexistence and performance.
Innovation Solution
A mobile radio device with a first transceiver for cellular wide area radio signals and a second transceiver for short range radio signals, controlled by a processor to restrict cellular wide area radio signal transmission using a hybrid automatic repeat request process and a predefined schedule, ensuring minimal interference between different radio access technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio access technologies are operated in parallel, then communication versatility is improved, but interference between technologies increases
Solution Approach 1:
The patent implements periodic time-based scheduling where the cellular transceiver operates during specific time periods and the short-range transceiver operates during other time periods. This time-division approach allows both radio access technologies to function periodically without continuous interference, resolving the contradiction between versatility and interference by alternating their operation in a periodic manner.
2Object-generated harmful factors
If cellular wide area radio signal transmission is restricted based on HARQ process, then interference with short range radio is reduced, but cellular transmission efficiency may be affected
Solution Approach 1:
The system performs preliminary scheduling of cellular transmissions based on the HARQ process state before initiating actual transmission. By checking HARQ feedback and pre-coordinating transmission timing with the short-range transceiver's schedule, the system avoids conflicts before they occur, reducing interference while maintaining cellular efficiency through proactive resource allocation.
Solution Approach 2:
The HARQ (Hybrid Automatic Repeat Request) mechanism provides feedback about transmission success or failure. The system uses this feedback to dynamically adjust transmission scheduling, restricting cellular transmissions during periods when short-range radio operations are expected, thereby reducing interference while maintaining overall transmission efficiency through intelligent, feedback-driven resource management.
3Object-generated harmful factors
If transmission timing is synchronized between different transceivers, then interference is reduced, but system complexity increases
Solution Approach 1:
The processor automatically performs timing synchronization by internally coordinating the transmission schedules of the cellular and short-range transceivers based on their respective operation patterns. This self-service synchronization mechanism reduces interference without requiring complex external coordination systems, as the device manages its own timing conflicts through integrated control logic.
Data Source
AI summary
According to an aspect of this disclosure, a radio communication device is provided comprising a first transceiver configured to transmit and receive signals in accordance with a Cellular Wide Area radio communication technology; a second transceiver configured to transmit and receive signals in accordance with a Short Range radio communication technology or a Metropolitan Area System radio communication technology; a first processor configured to control the first transceiver; and a second processor configured to control the second transceiver wherein the first processor is configured to control the first transceiver to transmit signals in accordance with a predefined transmitting schedule, wherein the first processor is further configured to control the first transceiver to omit transmitting signals within at least one of a time period and a frequency band provided for signal transmission of the first transceiver in accordance with the predefined transmitting schedule.