Downlink Signal Interference Reduction via Terminal Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G mobile communication, downlink signal transmission is hindered by interference between terminal devices when multiple signals are sent using the same physical resources with different beams, affecting transmission efficiency and throughput.
Innovation Solution
A method where terminal devices detect and indicate downlink signals with poor measurement quality to the network device, allowing it to schedule beams or transmission resources that minimize interference, thereby improving throughput by selecting less interfering signals for other devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple downlink signals are sent to different terminal devices using the same physical resource with different beams (MU-MIMO technology), then spectrum efficiency is improved, but interference between terminal devices increases
Solution Approach 1:
The terminal device measures the quality of downlink signals received on different physical resources and feeds back indication information to the network device. This feedback mechanism enables the network device to identify which physical resources experience interference and adjust resource allocation accordingly, resolving the contradiction between maintaining high throughput and reducing interference.
Solution Approach 2:
The network device changes the allocation parameters of physical resources based on feedback from terminal devices. When interference is detected on certain physical resources, the network device reallocates those resources to different terminal devices or adjusts beamforming parameters, thereby reducing interference while maintaining overall system throughput.
2Productivity
If the network device schedules downlink signals to multiple terminal devices on the same physical resource, then resource utilization is improved, but signal quality for individual terminal devices deteriorates
Solution Approach 1:
The network device segments the allocation of physical resources among different terminal devices based on measured signal quality and interference levels. Instead of allocating the same physical resource to multiple terminal devices simultaneously, the system divides resources in time or frequency domains, ensuring that each terminal device receives signals with adequate quality while maintaining high overall resource utilization.
Solution Approach 2:
The physical resource allocation is made dynamic rather than static. The network device continuously adjusts resource allocation based on real-time feedback from terminal devices about signal quality and interference conditions. This dynamic adjustment allows the system to optimize both resource utilization and signal quality adaptively changing conditions.
Data Source
AI summary
A method for downlink signal transmission and a terminal device are provided. The method includes operations as follows. The terminal device detects a plurality of downlink signals sent by a network device. The plurality of downlink signals are sent on a same physical resources using different beams. The terminal device sends first indication information to the network device. the first indication is used to indicate at least one target downlink signal in the plurality of downlink signals, and the at least one target downlink signal includes one or more downlink signals, measurement quality of which is poorer than measurement quality of any downlink signal other than the at least one target downlink signal in the plurality of downlink signals.