Base Station Reference Signal Resource Allocation for Interference Control
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Solution Overview
Problem
In wireless communication systems, the transmission of User Equipment-specific Reference Signals (URS) using the same resources across cells leads to inter-cell interference, deteriorating channel estimation capabilities and increasing signal transmission/reception complexity.
Innovation Solution
A method where a first base station determines a unique resource for transmitting its URS based on information from adjacent base stations and the number of antenna ports, ensuring different resources are used to prevent inter-cell interference, and applies Walsh sequences for orthogonal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If URS is transmitted using the same resource across cells, then resource utilization is efficient, but inter-cell interference increases and channel estimation capability deteriorates
Solution Approach 1:
The patent segments the time-frequency resources by dividing them into first resources and second resources. URS is transmitted on first resources while data signals are transmitted on second resources, preventing overlap and interference between reference signals and data transmissions across cells
Solution Approach 2:
The patent introduces a new resource dimension by allocating specific time-frequency resources exclusively for URS transmission. This dimensional separation ensures that URS from different cells do not interfere with each other while maintaining efficient resource utilization through structured allocation
2Reliability
If different resources are used for URS transmission to prevent inter-cell interference, then channel estimation capability improves, but signal transmission/reception complexity increases
Solution Approach 1:
The patent applies local quality by configuring different resource allocations based on local conditions - specifically, whether a cell is a first cell or a second cell. This localized resource configuration prevents inter-cell interference while maintaining manageable complexity through context-specific resource management
Solution Approach 2:
The patent changes the resource allocation parameters dynamically based on cell type identification. By adjusting which resources (first or second) are used for URS transmission depending on whether the cell is a first or second cell, the system achieves interference prevention without excessive complexity
Data Source
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AI summary
In a wireless communication system, a first Base Station (BS) receives control information including information related to transmission of a Reference Signal (RS) of at least one second BS from the at least one second BS which corresponds to an adjacent BS of the first BS, and transmits the RS by using a preset scheme of controlling interference based on the received control information.