Near-Field Region Detection Using Paired Reference Signals
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately distinguishing between near-field and far-field regions, particularly with the advent of large antenna arrays and high-frequency operations, which affect signal propagation and reception efficiency.
Innovation Solution
The implementation of primary and secondary reference signals with quasi-colocation relations, along with beam configurations, to enhance near-field and far-field detection and reporting, enabling precise identification of these regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large antenna arrays and high-frequency operations are used, then signal propagation and reception efficiency are improved, but the ability to distinguish between near-field and far-field regions deteriorates
Solution Approach 1:
The patent divides the wireless communication space into distinct near-field and far-field regions using separate reference signal resources. By configuring different CSI-RS resources specifically for near-field detection, the system can independently measure and identify regional characteristics without interference from far-field signals, thus resolving the difficulty in distinguishing between the two regions while maintaining large antenna array operations
Solution Approach 2:
The patent introduces reference signals as intermediary elements that mediate between the transmitted electromagnetic waves and the received signals. These reference signals are specifically designed to carry information about the propagation region characteristics, enabling the receiver to accurately determine whether it is in the near-field or far-field region by analyzing the reference signal properties rather than directly analyzing the communication signals
2Measurement precision
If reference signal resources are configured for near-field detection, then detection accuracy is improved, but system complexity increases
Solution Approach 1:
The patent combines near-field detection functionality with existing CSI-RS resource configurations. By reusing the established CSI-RS framework and adding near-field specific parameters to existing resource configurations, the system achieves enhanced detection capability without creating entirely separate signaling mechanisms, thus reducing the increase in system complexity
Solution Approach 2:
The patent designs reference signal resources that serve multiple functions: they are used for both conventional channel state information acquisition and for near-field/far-field region detection. This multi-functionality allows the same reference signal infrastructure to support both traditional communication performance optimization and the new regional detection capability, thereby minimizing additional system complexity
Data Source
AI summary
Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for near-field (NF) region detection. It may be beneficial if a wireless transmit-receive unit (WTRU) and the network are aware of whether the WTRU is within a NF region or not. A WTRU may be configured with a primary (P-RS) and a secondary (S-RS) set of resources. The WTRU performs measurements on each pair of associated RS resources selected from the P-RS and S-RS resource sets. Based on measurement results, the WTRU selects one or more RS groups that include a S-RS and an associated P-RS, and determines whether a pre-defined measurement condition is fulfilled. Based on the determined state for the selected RS groups, the WTRU determines to report an NF detection to the network, such as to enable location division multiple access and beam focusing which may enable enhanced spectrum efficiency.