Inter-TRP Interference Measurement in 5G NR Guard Periods
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Solution Overview
Problem
In 5G New Radio (NR) communication systems, accurately measuring inter-TRP interference is challenging due to dynamic time division duplex (TDD) configurations, which affects link adaptation and scheduling, especially in dense networks with smaller coverage radii.
Innovation Solution
A method is proposed where a victim TRP configures interference measurement resources, such as channel state information reference signals (CSI-RS) and demodulation reference signals (DM-RS), during a guard period to determine inter-TRP interference by receiving predefined interference signals from neighboring TRPs, allowing for precise interference measurement and link adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic TDD configurations are used in dense networks, then network capacity and coverage are improved, but inter-TRP interference measurement becomes inaccurate
Solution Approach 1:
The patent applies preliminary action by configuring interference measurement resources (IMRs) in advance during the guard period before actual data transmission begins. This allows the victim TRP to pre-measure and report inter-TRP interference characteristics, enabling the network to perform link adaptation and scheduling decisions based on accurate interference information before dynamic TDD transmissions start, thus resolving the measurement accuracy issue while maintaining network capacity.
2Measurement precision
If interference measurement resources are configured during guard period, then inter-TRP interference measurement accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the victim TRP to autonomously measure inter-TRP interference using pre-configured IMRs during the guard period and automatically generate interference measurement reports. This self-measurement and self-reporting mechanism eliminates the need for complex centralized interference management, reducing system complexity while achieving accurate inter-TRP interference measurement for link adaptation.
Data Source
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AI summary
An apparatus configured to be employed in a victim transmission reception point (TRP) associated with a new radio (NR) communication system is disclosed. The apparatus comprises a memory interface and a processing circuit. In some embodiments, the processing circuit is configured to process one or more predefined interference signals respectively received from one or more interfering TRPs during a guard period of the victim TRP. In some embodiments, the guard period comprises a time period between a downlink (DL) transmission and an uplink (UL) transmission associated with a time division duplex (TDD) frame of the victim TRP. In some embodiments, the processing circuit is further configured to determine an inter-TRP interference based on the one or more predefined interference signals. In some embodiments, the inter-TRP interference comprises a measurement of a UL interference at the victim TRP from the one or more interfering TRPs.