Sparse Codebook Allocation for Base Station Coordination Overhead
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Solution Overview
Problem
Base station coordinated communications systems face high network information exchange overheads, leading to complex data transmission and low network transmission efficiency.
Innovation Solution
Implementing a common sparse code codebook set where each base station in a coordinating cluster uses mutually different codebooks for data transmission with a terminal, reducing the need for data exchange between base stations and simplifying the data transmission process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base station coordination is implemented to improve coverage and spectral efficiency, then edge user service quality is improved, but network information exchange overhead increases and transmission efficiency decreases
Solution Approach 1:
The patent segments the codebook resource into multiple codebook sets, where each base station in the coordinating cluster is assigned a specific codebook set. This segmentation eliminates the need for extensive information exchange between base stations, as each independently manages its assigned codebooks, thereby reducing network overhead while maintaining coordination benefits
Solution Approach 2:
The controller pre-allocates codebook sets to each base station before the data transmission process begins. This preliminary assignment of codebooks allows base stations to independently perform data transmission without real-time coordination negotiations, reducing information exchange overhead during actual transmission while ensuring proper coordination
2Productivity
If base station coordination is implemented to reduce interference, then spectral efficiency of cell edge user is improved, but data transmission complexity increases
Solution Approach 1:
By dividing the codebook resources into separate codebook sets for each base station, the patent simplifies the transmission process. Each base station independently selects and uses codebooks from its assigned set without needing to coordinate with others, reducing the complexity of data transmission while maintaining interference reduction benefits through the coordinated structure
3Area of stationary object
If base station coordination is implemented to improve coverage, then coverage performance for edge user is improved, but network information exchange overhead increases
Solution Approach 1:
The controller performs preliminary allocation of codebook sets to each base station in the coordinating cluster before data transmission. This advance assignment eliminates the need for continuous information exchange during transmission, allowing base stations to cooperatively serve edge users across extended coverage areas while minimizing network overhead
Data Source
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Figure 4B
AI summary
According to a data transmission method and an apparatus provided in the present invention, sparse code codebooks that can be used by a base station in a coordinating cluster in data transmission with a terminal are mutually different. This implements that base stations separately perform data transmission with the terminal without performing data exchange or channel information exchange between the base stations, thereby reducing system overheads and improving network transmission efficiency.