Terminal Codebook Reporting for Base Station Transmission Mode
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Solution Overview
Problem
Conventional communication systems face difficulties in sharing a codebook supported by a mobile terminal with a base station, which hinders the improvement of transmission efficiency due to the lack of shared precoding matrices.
Innovation Solution
A terminal device reports its supported codebook to the base station, allowing the base station to determine an appropriate transmission mode based on the reported codebook information, enabling the sharing of codebooks between the terminal and base station devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple different codebooks are used to define precoding matrices, then transmission efficiency can be improved through adaptive control, but the base station and mobile terminal cannot share a common codebook, which hinders further efficiency improvements
Solution Approach 1:
The patent changes the parameter of codebook selection by introducing a new indicator (codebook indicator) that explicitly specifies which codebook the mobile terminal supports. This allows the base station to adaptively select appropriate precoding matrices from the indicated codebook, resolving the contradiction by enabling efficient adaptive control while maintaining codebook shareability through parameter-based identification.
2Productivity
If the mobile terminal stores multiple codebooks for different transmission modes, then transmission efficiency is improved, but storage overhead and processing complexity in the terminal increase
Solution Approach 1:
The patent extracts the codebook selection information from the terminal's internal state and explicitly reports it to the base station through a codebook indicator. This allows the terminal to store only the necessary codebook (the one it supports) rather than maintaining multiple codebooks, thereby reducing storage overhead while still enabling efficient transmission through base station awareness of the terminal's capabilities.
3Productivity
If the base station uses adaptive control with multiple codebooks, then data transmission efficiency is improved, but the lack of codebook sharing between base station and terminal increases processing complexity
Solution Approach 1:
The patent implements a feedback mechanism where the mobile terminal reports its supported codebook information to the base station through uplink signaling. This feedback enables the base station to accurately understand the terminal's codebook capabilities and select appropriate precoding matrices, thereby maintaining high transmission efficiency while reducing processing complexity through informed decision-making based on terminal feedback.
Data Source
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AI summary
In a communication system in which a base station performing precoding processing and a mobile terminal communicate with each other, communication is efficiently performed. The terminal device reports to the base station device, information indicating a codebook that the terminal device supports, among a plurality of codebooks. The base station device determines a transmission mode, based on the information indicating the codebook that the terminal device supports.