Interference Reference Signal Scheduling for Dynamic TDD Base Stations
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G networks, face inefficiencies in managing fast-changing interference between base stations due to the limited use of reference signals like RIM-RS, which are inadequate for full duplex and dynamic TDD scenarios.
Innovation Solution
The aggressor base station transmits reference signal RS2 on multiple occasions, each configured with distinct time and frequency domain resources and transmission power, allowing the victim base station to measure interference and report back, enabling the aggressor to adjust its transmission parameters to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing reference signals are used in full duplex and dynamic TDD scenarios, then the system maintains basic reference signal functionality, but the reference signals are inadequate for fast-changing interference conditions
Solution Approach 1:
The patent applies dynamics by making the reference signal configuration adaptable and changeable in response to fast-changing interference conditions. The network device dynamically adjusts reference signal parameters including time domain resources, frequency domain resources, and transmission occasions based on current interference measurements and channel conditions, allowing the system to adapt to dynamic TDD and full duplex scenarios while maintaining reliable interference measurement.
2Adaptability or versatility
If the aggressor base station transmits reference signal on multiple occasions with different configurations, then the adaptability to interference conditions improves, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the reference signal transmission into multiple distinct occasions, where each occasion has specific time domain resources, frequency domain resources, and configuration parameters. This segmentation allows the system to measure interference under different conditions separately, improving adaptability while managing complexity through structured organization of measurement occasions.
Solution Approach 2:
The patent applies parameter changes by varying reference signal configurations across different transmission occasions, including changes in time domain resources, frequency domain resources, and association with different second reference signals. This enables the system to adapt to different interference conditions by adjusting parameters rather than redesigning the entire measurement mechanism.
3Reliability
If reference signal transmission uses fixed time and frequency resources, then the system operation is simple, but it cannot effectively measure fast-changing interference
Solution Approach 1:
The patent implements dynamics by enabling the network device to dynamically select and adjust time domain resources and frequency domain resources for reference signal transmission based on current interference conditions. This allows effective measurement of fast-changing interference while maintaining operational simplicity through automated resource selection and configuration management.
Data Source
AI summary
Techniques are described for configuration and/or transmission of reference signals. An example wireless communication method includes transmitting, by a first network device, a first reference signal to a second network device, where the first reference signal is transmitted on N occasions, where each of the N occasions is based on a first set of time domain resources and a first set of frequency domain resources of the first reference signal, where each of the N occasions includes X time units in time domain and Y frequency units in frequency domain, and where N, X, and Y are integers greater than or equal to 1; and receiving, by the first network device from the second network device, a measurement report in response to the transmitting the first reference signal.