Uplink Resource Muting for TDD Cross-Link Interference Measurement
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Solution Overview
Problem
In Time Division Duplex (TDD) communication systems, uplink frequency domain resources are limited, leading to poor uplink coverage, and cross-link interference (CLI) between network devices affects communication performance, particularly for cell edge terminal devices.
Innovation Solution
A communication method that involves muting specific frequency domain resources to extend time domain signal periodicity without damaging the single-carrier characteristic of DFT-S-OFDM waveforms, allowing CLI measurement without interfering with critical uplink information, thus ensuring effective communication for cell edge devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CLI measurement resources are allocated in TDD systems, then cross-link interference measurement capability is improved, but communication performance of cell edge terminal devices deteriorates due to resource conflict
Solution Approach 1:
The patent segments the frequency domain resources by muting specific REs with indexes of nN+k in the second resource, creating a comb-shaped pattern that allows CLI measurement while preserving uplink transmission resources for cell edge devices
Solution Approach 2:
The patent applies local quality by selectively muting only specific REs (those with indexes of nN+k) in the second resource while keeping other REs available for uplink transmission, thus achieving CLI measurement capability without completely blocking uplink resources
2Measurement precision
If frequency domain resources are muted to enable CLI measurement, then measurement capability is improved, but time domain signal periodicity is extended which may affect signal characteristics
Solution Approach 1:
The patent changes the frequency domain parameter by muting specific REs with indexes of nN+k, which corresponds to extending time domain signal periodicity while maintaining the single-carrier characteristic through the comb-shaped frequency pattern
Data Source
AI summary
A communication method, apparatus, and system. The method may include: receiving first signaling and second signaling, where the first signaling indicates to send a first signal on a first resource, the second signaling indicates a second resource that is not used for uplink transmission, the second resource overlaps with the first resource in time domain, the second resource includes a plurality of resource elements REs in one resource block RB, and the plurality of REs are resource elements REs with indexes of nN+k, where n is an integer greater than or equal to 0 and less than or equal to 12/N−1, k indicates N−1 different integers from 0 to N−1, and N is a positive integer; and sending the first signal on a third resource, where the third resource is determined based on the first resource and the second resource.