Full-Duplex Cell Spectrum Sensing for Interference-Aware Initial Access
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Solution Overview
Problem
There is a need for improved spectrum sensing and interference management in wireless communication systems, particularly in full-duplex (FD) cells, to enhance the performance of 5G NR technology and other multi-access technologies.
Innovation Solution
A method and apparatus at the user equipment (UE) for spectrum sensing and selecting a random access channel (RACH) occasion (RO) or cell based on information about FD operation or cross-link interference (CLI) during initial access, and a base station for transmitting system information and receiving communications related to FD operation or CLI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spectrum sensing is performed during initial access in FD cells, then interference management capability is improved, but initial access complexity increases
Solution Approach 1:
The base station transmits CLI indication information to the UE before the UE performs random access. This preliminary provision of interference information allows the UE to make informed decisions about RO selection without having to perform complex spectrum sensing and interference measurement procedures during the critical initial access phase, thereby reducing initial access complexity while maintaining reliable interference management.
2Measurement precision
If CLI measurement resources are configured for spectrum sensing, then interference detection accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts and transmits only the essential CLI indication information from the base station to the UE, rather than configuring comprehensive CLI measurement resources. This extraction of critical interference information reduces signaling overhead while still providing the UE with sufficient data to make informed RO selection decisions, avoiding the need for extensive measurement resource configurations.
3Productivity
If UE selects RO based on FD operation or CLI information, then access performance is improved, but processing requirements at UE increase
Solution Approach 1:
The base station provides FD operation information and CLI indication information to the UE in advance, before the UE needs to select a random access occasion. This preliminary provision of interference-related information simplifies the UE's processing burden during RO selection, as the UE receives pre-processed interference data rather than needing to perform complex real-time spectrum sensing and analysis, thereby maintaining high access performance with reduced processing requirements.
Data Source
AI summary
Apparatus, methods, and computer program products for using spectrum sensing and supporting FD operations are provided. An example method may include performing a spectrum sensing based on a set of resources or a configuration to acquire information about at least one of FD operation or CLI associated with one or more cells of a base station during initial access. The example method may further include selecting a RO or a cell of the one or more cells based on the acquired information about the at least one of the FD operation or the CLI.