In-Band Full-Duplex Communication Device for Interference Avoidance
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Solution Overview
Problem
Existing radio communication devices face challenges in managing interference when sharing communication resources with other devices in the same frequency band, particularly due to unclear cooperation operations and information sharing between terminals.
Innovation Solution
A communication device and method that include a control unit for detecting reception signals in the same frequency band during transmission and performing interference avoidance operations based on the detection results, utilizing techniques such as stopping transmission, changing radio resources, adjusting beam patterns, and coordinating with other devices to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If communication resources are shared among multiple radio communication systems, then utilization efficiency of communication resources is improved, but interference occurs causing communication failures
Solution Approach 1:
The terminal performs sensing operations before and during transmission to detect primary user signals in advance, allowing it to preemptively adjust its transmission or perform avoidance operations before interference occurs, thus maintaining both resource utilization and communication reliability
Solution Approach 2:
The system implements continuous sensing feedback mechanisms where transmission results and detected signals are fed back to adjust subsequent transmission decisions, enabling dynamic adaptation to shared spectrum conditions while maintaining stable communication
2Reliability
If spectrum sensing is performed to detect primary user signals, then interference avoidance is achieved, but transmission time is lost during sensing operations
Solution Approach 1:
The terminal performs sensing operations continuously or simultaneously with transmission activities rather than stopping transmission to sense, ensuring that sensing coverage is maintained without losing transmission opportunities, thus eliminating time loss while preserving interference avoidance capability
Solution Approach 2:
Sensing is performed in advance of potential interference scenarios, allowing the system to prepare avoidance strategies without interrupting ongoing transmissions, thereby maintaining continuous useful action for both sensing and communication
3Reliability
If avoidance operations are performed to protect primary user communication, then interference is reduced, but cooperation operations between terminals are not clearly defined
Solution Approach 1:
Each terminal independently performs sensing operations and autonomously determines whether to execute avoidance actions based on detected signals, eliminating the need for complex inter-terminal cooperation protocols while still achieving reliable primary user protection through decentralized self-service mechanisms
Data Source
AI summary
In a communication device that performs in-band full-duplex communication, communication is performed while avoiding interference due to signals of other communication devices. A communication device (20, 40) according to the present disclosure includes a control unit (24, 45). The control unit (24, 45) included in the communication device (20, 40) according to the present disclosure performs control to detect a reception signal by performing reception in the same frequency band as transmission when transmitting to another radio communication device. Furthermore, the control unit (24, 45) included in the communication device (20, 40) according to the present disclosure further performs an interference avoidance operation of avoiding interference based on the detected reception signal.