Macro Node and Remote Radio Head Control Data Separation
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE technology, face challenges in efficiently managing control and data transmissions across macro nodes and remote radio heads in heterogeneous networks, leading to suboptimal performance and increased complexity in reconfiguration and interference management.
Innovation Solution
The separation of control and data transmissions within the coverage area of macro nodes and geographically displaced remote radio heads, using common reference signals for control information and UE-specific reference signals for data, allows for faster reconfiguration and improved channel state information feedback, enabling cell splitting and efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If control and data transmissions are combined in the same macro node/RRH configuration, then system complexity is reduced, but reconfiguration speed and flexibility deteriorate
Solution Approach 1:
The patent segments control transmissions and data transmissions into separate transmission paths. Control information is transmitted from a first subset of transmission points using common reference signals, while data transmissions are sent from a second subset of transmission points using UE-specific reference signals. This segmentation allows independent optimization and faster reconfiguration of data transmission without affecting control transmission stability.
2Adaptability or versatility
If cell splitting is implemented across different transmission points, then data transmission flexibility is improved, but control transmission coordination complexity increases
Solution Approach 1:
The patent extracts control transmission functions from the data transmission framework. By using common reference signals for control information that are independent of UE-specific reference signals for data, the system allows cell splitting and flexible data transmission across different transmission points while maintaining a unified, simplified control transmission mechanism that does not require complex coordination.
3Measurement precision
If UE-specific reference signals are used for data transmission, then channel state information accuracy is improved, but reference signal overhead increases
Solution Approach 1:
The patent applies local quality by using UE-specific reference signals only where needed for data transmission from specific transmission points, while common reference signals are used for control information. This localized application of UE-specific reference signals provides accurate channel state information for data transmission without unnecessarily increasing reference signal overhead across the entire system.
Data Source
AI summary
A method, an apparatus, and a computer program product for wireless communication are provided for separating control transmissions and data transmissions within the coverage area of a plurality of transmission/reception points or points that are geographically displaced, the plurality of points comprising a macro node and a plurality of remote radio heads (RRHs) coupled to the macro node. Separating control transmissions and data transmissions in the macro node/RRH configuration may allow UEs to be associated with one set of transmission points for data transmissions and the same set or a different set of transmission points for common control signaling. Separating control transmissions and data transmissions may also allow for faster reconfiguration of antenna ports used for UE data transmission compared with reconfiguration via a handover process.