Wireless Device Reception Buffer Management for Multi-Cell Modulation Orders
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Solution Overview
Problem
In wireless communication systems, the increasing data traffic and varied capabilities of terminals lead to complexity in managing reception buffers and signaling overhead, particularly with the introduction of higher modulation orders like 256-QAM, which results in inefficient operation and increased network complexity.
Innovation Solution
A method for a wireless device to receive data from multiple cells by storing coded bits in a reception buffer based on the maximum modulation order supported by each cell, with separate buffer management for high and low order cells, and reporting capabilities to the base station to effectively manage the reception buffer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a plurality of cells with different modulation orders are configured, then data traffic handling capability is improved, but reception buffer management complexity increases
Solution Approach 1:
The reception buffer is segmented into multiple separate buffers, with each buffer corresponding to a specific cell or modulation order. This segmentation allows independent management of buffer resources for different cells, preventing the need to manage a single large buffer with mixed modulation orders, thereby reducing management complexity while maintaining multi-cell productivity
Solution Approach 2:
Different buffer management parameters and sizes are assigned to different cells based on their specific modulation orders. Each cell receives localized buffer resources tailored to its modulation characteristics, rather than applying a uniform buffer management approach across all cells. This local quality approach optimizes buffer efficiency for each cell while simplifying overall management
2Productivity
If higher modulation orders like 256-QAM are introduced, then data transmission efficiency is improved, but signaling overhead increases
Solution Approach 1:
The buffer size determination mechanism is designed to universally handle multiple modulation orders (QPSK, 16-QAM, 64-QAM, 256-QAM) through a single standardized approach. The base station uses a unified algorithm that automatically adapts buffer sizes based on the detected modulation order, eliminating the need for separate signaling procedures for each modulation type and reducing overall signaling overhead
3Productivity
If separate buffer management for high and low order cells is implemented, then buffer efficiency is improved, but device complexity increases
Solution Approach 1:
The buffer management system dynamically adjusts buffer sizes and allocation strategies based on the modulation order of each cell. The system automatically transitions between different buffer management modes depending on whether cells use high-order or low-order modulation, allowing optimized buffer efficiency without requiring complex static configurations. This dynamic adaptation simplifies the overall device architecture compared to fixed complex buffer management schemes
Data Source
AI summary
Provided are a method for receiving data in a wireless communication system and a device using same. A device receives a code block from one cell among configured multiple cells. If a decoding error of the code block is detected, the device stores a part of or all of the code block in a receiver buffer. The number of coded bits of the code block stored in the receiver buffer is determined on the basis of the maximum modulation order supported by the cell from which the code block is received.