Network Apparatus Adjusting Channel State Information Frequency
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Solution Overview
Problem
In LTE systems, the periodic transmission of channel state information from user terminals to base stations increases overhead as the number of user terminals grows, leading to inefficiencies in communication.
Innovation Solution
A network apparatus and user terminal configuration that determines and adjusts the transmission frequency of channel state information based on whether a user terminal is fixed or moving, reducing the frequency of transmissions for fixed terminals to minimize overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel state information is transmitted periodically from each user terminal to the base station, then the base station can perform effective scheduling and maintain communication quality, but the overhead increases in accordance with the increase in the number of user terminals
Solution Approach 1:
The patent applies local quality by differentiating the transmission frequency of channel state information based on user terminal characteristics. Fixed user terminals (with restricted movement) transmit channel state information at a lower frequency compared to moving user terminals. This localized differentiation reduces overall overhead while maintaining communication quality for each category of user terminals appropriately.
Solution Approach 2:
The patent implements dynamics by making the transmission frequency of channel state information adaptable rather than static. The base station determines and notifies each user terminal of its specific transmission frequency based on whether the terminal is fixed or moving. This dynamic adjustment allows the system to optimize overhead reduction for fixed terminals while maintaining adequate reporting frequency for moving terminals that experience more channel variations.
2Quantity of substance
If the transmission frequency of channel state information is reduced for fixed user terminals, then the overhead is reduced, but the channel state information may become less accurate for moving user terminals
Solution Approach 1:
The patent applies local quality by differentiating the transmission frequency of channel state information based on user terminal characteristics. Fixed user terminals (with restricted movement) transmit channel state information at a lower frequency compared to moving user terminals. This localized differentiation reduces overall overhead while maintaining communication quality for each category of user terminals appropriately.
Solution Approach 2:
The patent implements dynamics by making the transmission frequency of channel state information adaptable rather than static. The base station determines and notifies each user terminal of its specific transmission frequency based on whether the terminal is fixed or moving. This dynamic adjustment allows the system to optimize overhead reduction for fixed terminals while maintaining adequate reporting frequency for moving terminals that experience more channel variations.
Data Source
AI summary
A network apparatus according to the present invention comprises: a receiver configured to receive, from a user terminal, channel state information corresponding to a channel state of a downlink signal from a cell to which the user terminal is connected, to the user terminal; a controller configured to determine transmission frequency of the channel state information; and a transmitter configured to transmit, to the user terminal, frequency information indicating the transmission frequency determined by the controller. The controller determines the transmission frequency of the user terminal on the basis of fixation information indicating that the user terminal is a fixed user terminal whose movement is restricted.