SRS Timing Configuration for Accurate TDD CLI Measurement
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Solution Overview
Problem
In time division duplex (TDD) mode, uplink transmission from one terminal device interferes with downlink reception of another, causing cross-link interference (CLI), which existing technologies have not effectively addressed.
Innovation Solution
A wireless communication method and network device configure a sounding reference signal (SRS) resource for CLI measurement, with timing referencing a cell's timing to ensure real-time effectiveness and accuracy of CLI measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SRS resource timing is not referenced to cell timing, then configuration flexibility is reduced, but measurement real-time effectiveness deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring the SRS resource timing to reference cell timing before CLI measurement occurs. The network device configures the terminal with timing relationships in advance (via RRC signaling or MAC CE), ensuring that when CLI measurement is needed, the timing is already established and synchronized with cell timing, guaranteeing real-time effectiveness without complex runtime adjustments
Solution Approach 2:
The patent changes the timing parameter of SRS resource by establishing a reference relationship with cell timing. Instead of using absolute timing values that require complex configuration, the SRS timing is expressed as an offset or reference to the cell timing, simplifying the configuration while ensuring real-time effectiveness through dynamic alignment with cell timing changes
2Measurement precision
If existing CLI measurement methods are used, then implementation is simpler, but measurement accuracy deteriorates due to interference
Solution Approach 1:
The patent extracts the SRS resource configuration from general uplink resources and creates a dedicated SRS resource specifically for CLI measurement. By separating this measurement function into its own configured resource with specific timing relationships to cell timing, the measurement signal is isolated from general uplink transmission interference, improving measurement accuracy
Solution Approach 2:
The patent introduces the SRS resource as an intermediary measurement signal between the terminal and network for CLI assessment. This intermediary resource is specifically configured with timing references to cell timing, allowing indirect measurement of CLI effects without direct exposure to the interfering uplink transmission, thereby improving measurement precision
Data Source
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AI summary
Embodiments of the present application provides a wireless communication method, terminal device and network device, which may implement CLI measurement. The wireless communication method includes: receiving, by a first terminal device, first configuration information sent by a first network device, the first configuration information being configured to configure an SRS resource for CLI measurement, and timing of the SRS referring to timing of a first cell or referring to timing configured by the first network device, wherein the first cell is one of: a serving cell with a frequency point associated with the SRS, a primary cell serving the first terminal device, and a primary secondary cell serving the first terminal device.