Interference Cancellation Probability Indicator for Cell Edge Resources
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Solution Overview
Problem
In wireless communication systems, especially in LTE and next-generation networks like 5G, the challenge lies in efficiently managing inter-cell interference to optimize communication capacity and resource utilization, particularly at cell edges where interference cancellation is crucial but resource allocation and beamforming strategies are complex, especially when dealing with multiple antennas and varying terminal speeds.
Innovation Solution
The method involves actively allocating interference cancellation-capable terminals to resources with high interference cancellation probabilities, using statistical information exchange between base stations to determine the likelihood of successful interference cancellation, and adjusting beam widths based on terminal speed and direction to minimize interference, thereby reducing unnecessary interference cancellation loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interference cancellation is performed at all terminals, then interference cancellation capability is improved, but terminal complexity and processing load increase
Solution Approach 1:
The patent applies local quality by enabling interference cancellation only at specific terminals that are identified as having interference cancellation capability, rather than uniformly at all terminals. The base station determines which terminals can perform interference cancellation and allocates them to resources where interference cancellation is beneficial, thus improving interference cancellation capability where needed while avoiding unnecessary complexity at other terminals.
2Reliability
If interference cancellation is performed at all terminals, then communication quality is improved, but processing load and energy consumption increase
Solution Approach 1:
The patent enables interference cancellation only at terminals that are specifically identified as having this capability and are allocated to resources where it is beneficial. This selective approach improves communication quality in scenarios where interference cancellation is needed while avoiding unnecessary energy consumption at terminals where it would not provide benefit.
3Measurement precision
If base stations exchange detailed interference information, then interference cancellation accuracy is improved, but information transmission overhead increases
Solution Approach 1:
The patent extracts only the essential interference cancellation capability information from terminals and exchanges this condensed information between base stations. Instead of exchanging detailed interference characteristics, the base stations exchange information about which terminals have interference cancellation capability and allocate them accordingly, thus achieving sufficient interference cancellation accuracy while minimizing information transmission overhead.
4Area of stationary object
If interference cancellation resources are allocated to all terminals, then interference cancellation coverage is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent allocates interference cancellation resources selectively to terminals that have interference cancellation capability and are located in situations where interference cancellation would be beneficial. The base station determines which terminals should receive interference cancellation resources based on their capability and channel conditions, thus providing adequate coverage where needed while maintaining high resource allocation efficiency by avoiding waste on terminals that cannot utilize these resources.
Data Source
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AI summary
Provided are a method and a device for transmitting interference cancellation information for cancelling interference between cells in a wireless communication system. The method for transmitting interference cancellation information may comprise the steps of: on the basis of feedback information received from a terminal belonging to a cell controlled by a predetermined base station, estimating a symbol error rate or a packet error rate on a cell boundary region; by comparing the symbol error rate or the packet error rate with a predetermined critical value, determining a probability indicator indicating the probability of cancelling interference between cells at the cell boundary region; and transmitting information on the probability indicator to an adjacent cell.