CLI RSSI Resource Identification for SBFD Interference Reporting
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Solution Overview
Problem
Cross-link interference (CLI) is problematic in full-duplex (FD) communication scenarios, particularly in subband full-duplex (SBFD) communication, where identifying and measuring CLI resources is challenging, and existing reporting configurations are not adequately defined for FD and non-FD symbols.
Innovation Solution
The method involves identifying a cross-link interference (CLI) received signal strength indicator (RSSI) resource in SBFD symbols of an active downlink bandwidth part, and configuring reporting based on whether the CLI resource is in an FD or non-FD symbol, using explicit or implicit indications and report configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CLI measurement is performed in SBFD symbols, then CLI mitigation capability is improved, but measurement complexity and configuration difficulty increase
Solution Approach 1:
The patent segments the SBFD symbol into different symbol types (first symbols and second symbols) with distinct characteristics. First symbols are configured for downlink communication while second symbols are configured for uplink communication, allowing the UE to perform CLI measurement by identifying and measuring specific symbol types within the SBFD structure. This segmentation enables targeted measurement of interference in specific time-domain resources without requiring measurement of entire symbols, thereby reducing measurement complexity while maintaining mitigation capability.
Solution Approach 2:
The patent employs preliminary action by configuring the network to indicate which symbols within the SBFD symbol should be used for CLI measurement before the actual measurement occurs. The network provides configuration information that pre-identifies the appropriate first or second symbols for measurement purposes. This preliminary configuration eliminates the need for the UE to perform complex real-time analysis to determine measurement targets, thus reducing measurement and configuration complexity while enabling effective CLI mitigation.
2Measurement precision
If multiple report configurations are used for FD and non-FD symbols, then CLI reporting accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies local quality by creating different report configurations tailored to specific local conditions within the SBFD symbol. Instead of using a single uniform reporting configuration for all symbols, the system implements separate configurations for first symbols (downlink-oriented) and second symbols (uplink-oriented). Each configuration includes appropriate measurement parameters, reporting triggers, and formatting rules optimized for its specific symbol type. This localized approach enables accurate CLI reporting for different symbol types while managing complexity through clear differentiation and specialization of each configuration.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a cross-link interference (CLI) received signal strength indicator (RSSI) resource in a subband full-duplex (SBPD) symbol of one or more subbands of an active downlink bandwidth part. The UE may perform a measurement of the CLI RSSI resource in the SBPD symbol of the one or more subbands of the active downlink bandwidth part. Numerous other aspects are described.