Zero-Power Terminal Signal Path Separation
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Solution Overview
Problem
Zero-power terminal devices in communication systems face interference issues due to the overlapping transmission paths of downlink and uplink signals, which limits their communication distance and efficiency.
Innovation Solution
A dedicated trigger node is deployed to send a downlink signal to the zero-power terminal, separating the transmission paths of downlink and uplink signals, thereby avoiding interference and increasing the communication distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a zero-power terminal uses simple design for low power consumption and low cost, then power consumption and cost are reduced, but communication distance and efficiency deteriorate due to signal interference from overlapping transmission paths
Solution Approach 1:
The patent segments the transmission path into two separate paths: a downlink transmission path from the base station to the terminal, and an uplink transmission path from the terminal to the base station. This segmentation prevents the overlapping of transmission paths that causes signal interference, thereby improving communication efficiency while maintaining the zero-power terminal's low power consumption characteristics.
2Device complexity
If downlink and uplink signals share the same transmission path, then device complexity is reduced, but signal interference increases which limits communication distance
Solution Approach 1:
The patent introduces spatial separation as an additional dimension for signal transmission. By configuring the downlink and uplink signals to transmit through different spatial paths (different dimensions), the system avoids signal interference without significantly increasing device complexity, thereby extending the communication distance of zero-power terminals.
Data Source
AI summary
Disclosed are a communication method and a communications apparatus. The method includes: receiving, by a terminal device, a first downlink signal from a first device, where the terminal device is a zero-power terminal; and sending, by the terminal device, a first uplink signal to a second device according to the first downlink signal.