Uplink Zero-Power Reference Signals for Neighboring-Cell Interference
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Solution Overview
Problem
In mobile communications networks, terminal devices experience interference from neighboring cells during data transmission, leading to incorrect demodulation of received signals and transmission failures.
Innovation Solution
The terminal device sets a zero power reference signal in the uplink signal, allowing the network device to estimate neighboring cell interference and perform interference cancellation, thereby improving demodulation performance and transmission capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transmission is performed in mobile communications network, then data transmission capability is provided, but interference from neighboring cells causes demodulation failure and transmission failure
Solution Approach 1:
The patent converts the harmful interference from neighboring cells into a measurable signal by introducing zero-power reference signals. These signals allow the network device to estimate and measure the interference characteristics, then use this information for interference cancellation and compensation, transforming the harmful interference into useful information for improving transmission reliability
Solution Approach 2:
The patent introduces zero-power reference signals as an intermediary element between the transmitting and receiving devices. These reference signals serve as a mediator that carries interference information from the neighboring cells to the network device, enabling interference estimation and cancellation without affecting the actual data transmission
2Measurement precision
If zero power reference signal is set in uplink signal, then interference measurement accuracy is improved, but signal structure complexity increases
Solution Approach 1:
The patent applies local quality by introducing zero-power reference signals only at specific time-frequency resource positions where interference measurement is needed, rather than modifying the entire signal structure. This localized approach enables accurate interference measurement while minimizing the impact on overall signal structure complexity
Solution Approach 2:
The patent uses partial action by configuring zero-power reference signals only in certain resource elements where interference estimation is required, rather than applying interference measurement techniques across all signal resources. This selective approach balances measurement accuracy with signal structure simplicity
Data Source
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AI summary
Embodiments of this application provide an uplink transmission method and a related apparatus. The method includes: A terminal device sends, to a network device, an uplink signal that includes a zero power reference signal, where in a time-frequency resource for sending the uplink signal, transmit power of the uplink signal within a range of a time-frequency resource of the zero power reference signal is zero. Technical solutions provided in this application can enable a base station to measure uplink transmission interference, to improve performance of transmitting data by the terminal device to the network device.