UE Specific Reference Signal Parameter Coordination
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Solution Overview
Problem
In coordinated multiple point transmission and reception systems, UE specific reference signals generated by different eNBs using shared parameters experience mutual interference, limiting system throughput and performance.
Innovation Solution
A method and device for transmitting and generating parameters, where a transmission node determines and sends a first set of parameters to adjacent nodes through the X2 interface, allowing these nodes to generate UE specific reference signals, thereby avoiding shared parameter usage and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If different eNBs use shared parameters to generate UE specific reference signals, then device complexity is reduced, but interference between reference signals increases
Solution Approach 1:
The patent applies local quality by allowing different eNBs to use different parameter sets (first parameter set vs. second parameter set) in different geographic locations or network domains. This enables each eNB to independently configure parameters such as cyclic shifts, orthogonal cover codes, or frequency offsets to avoid reference signal collisions, thereby reducing interference while maintaining manageable complexity through localized parameter differentiation.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting reference signal generation parameters based on network conditions and eNB identification. When reference signal interference is detected or predicted, the system modifies parameters such as cyclic shift values, orthogonal cover code selections, or resource element mappings to eliminate collisions. This allows the system to adapt parameter configurations to prevent interference while maintaining overall system coordination.
2Object-affected harmful factors
If eNBs coordinate parameter transmission through X2 interface, then reference signal interference is reduced, but network complexity increases
Solution Approach 1:
The patent applies preliminary action by having eNBs exchange parameter information through the X2 interface before actual reference signal transmission begins. This advance coordination allows neighboring eNBs to configure their reference signal parameters to avoid collisions, ensuring interference-free operation from the outset. The parameter transmission and coordination occur in advance of data transmission, preventing interference issues rather than remedying them.
Solution Approach 2:
The X2 interface serves as an intermediary mechanism that facilitates coordinated parameter exchange between eNBs. Rather than requiring complex direct interference management between all network elements, the standardized X2 interface provides a structured communication path for sharing reference signal parameter configurations, simplifying the coordination process while effectively reducing reference signal interference through centralized parameter management.
Data Source
AI summary
Disclosed are a method and device for transmitting parameters and a method and device for generating parameters. The method for transmitting parameters comprises: a transmission node determines a first set of parameters for the transmission node to generate at least one user equipment specific reference signal; and the transmission node sends the first set of parameters to one or more transmission nodes adjacent to the transmission node. Through the disclosure, interference between user equipment specific reference signals of transmission nodes is reduced.