TDD Characteristic Signal Multiplexing for Remote Interference Detection
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Solution Overview
Problem
In time division duplexing (TDD) systems, atmospheric duct phenomena cause downlink radio signals from remote base stations to interfere with uplink signals of local base stations, and existing remote interference source detection methods are inaccurate due to reduced detection of characteristic sequence signals when spectrum resources are shared among different network standards like LTE and NR.
Innovation Solution
Generating and sending characteristic sequence signals in a spatial multiplexing manner for multiple TDD network standards, such as TDD-LTE and TDD-NR, on a shared public frequency band, and stopping service scheduling during signal transmission to improve detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If characteristic sequence signals of different TDD network standards are sent on shared spectrum resources, then spectrum resource utilization is improved, but detection accuracy of remote interference sources deteriorates
Solution Approach 1:
The patent segments the detection process by separating characteristic sequence signals of different TDD network standards into distinct time resources. Each standard's signals are transmitted in different time slots, allowing the receiving end to detect each standard's signals independently without interference from other standards, thus maintaining detection accuracy while utilizing shared spectrum resources.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the transmitting end to send characteristic sequence signals of multiple TDD network standards in advance, with the receiving end pre-programmed to detect signals from specific standards based on their time slot assignments. This preliminary arrangement ensures that when signals are transmitted, the receiving end is ready to accurately detect the intended standard without confusion.
2Adaptability or versatility
If a base station sends characteristic sequence signals for multiple network standards, then remote interference source identification capability is improved, but signal transmission complexity increases
Solution Approach 1:
The patent segments the signal transmission process by assigning different time resources to characteristic sequence signals of different TDD network standards. This temporal segmentation allows a single base station to transmit signals for multiple standards without requiring complex multiplexing mechanisms, thereby improving identification capability while keeping transmission complexity manageable through simple time-based separation.
Solution Approach 2:
The patent implements universality by enabling a single base station to perform multiple functions: transmitting characteristic sequence signals for different TDD network standards using the same physical infrastructure. The base station can identify and transmit signals for LTE, NR, or other standards based on time slot assignments, making the system versatile without requiring separate dedicated transmission paths for each standard.
Data Source
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AI summary
A signal sending and detection method and a related apparatus are provided, to improve accuracy of identifying a remote interference source. The method includes: A sending apparatus generates characteristic sequence signals corresponding to a plurality of time division duplexing TDD network standards, where the characteristic sequence signal is used for remote interference detection; and the sending apparatus sends the characteristic sequence signals in a spatial multiplexing manner.