MCS Table Switching Across Bandwidth Parts for 256QAM Throughput
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Solution Overview
Problem
The use of larger modulation orders in wireless communication networks, such as 256 QAM, can lead to power consumption and implementation complexity due to varying UE bandwidth capabilities, resulting in performance loss and throughput reduction for certain path loss scenarios.
Innovation Solution
Implementing a method for MCS table switching by determining a terminal device's power reduction value and channel quality to switch between different bandwidth parts associated with distinct MCS tables, optimizing network performance based on these factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If larger modulation orders (e.g., 256 QAM) are used to improve spectral efficiency, then network throughput is improved, but power consumption and implementation complexity increase
Solution Approach 1:
The patent implements dynamic MCS table switching where the network device switches between different MCS tables (e.g., 64QAM table and 256QAM table) based on real-time channel quality feedback from the terminal device. This allows the system to adaptively select the appropriate modulation order - using higher order modulation (256 QAM) when channel conditions are good to maximize throughput, and falling back to lower order modulation (64 QAM) when channel conditions deteriorate to reduce power consumption and implementation complexity.
2Productivity
If larger modulation orders are used to improve spectral efficiency, then network throughput is improved, but implementation complexity increases
Solution Approach 1:
The system dynamically switches between multiple MCS tables based on channel quality conditions. The network device monitors channel quality feedback and selects the appropriate MCS table (64QAM or 256QAM) to configure for the terminal device, thereby adapting the implementation complexity to match the actual operational requirements rather than always using the most complex highest-order modulation.
Solution Approach 2:
The patent changes the modulation order parameter by switching between different MCS tables. When channel quality is good, the system changes to a 256QAM table with higher spectral efficiency; when channel quality deteriorates, it changes to a 64QAM table with lower complexity. This parameter switching allows the system to optimize the trade-off between throughput and implementation complexity based on real-time conditions.
3Productivity
If higher modulation orders are used to improve spectral efficiency, then network throughput is improved, but performance loss occurs in certain path loss scenarios
Solution Approach 1:
The patent implements a feedback mechanism where the terminal device reports channel quality information to the network device. Based on this feedback, the network device determines the appropriate MCS table to switch to. This feedback loop ensures that the system only uses higher modulation orders (256 QAM) when channel conditions actually support them, preventing performance degradation in poor path loss scenarios while maximizing throughput when conditions are favorable.
Solution Approach 2:
The system dynamically adapts the modulation order based on real-time channel quality assessment. When path loss is high and channel conditions are poor, the system dynamically switches to lower-order modulation (64 QAM) to maintain reliable communication. When path loss is low and channel conditions are good, it switches to higher-order modulation (256 QAM) to maximize throughput, thereby ensuring performance reliability across varying network conditions.
Data Source
AI summary
Embodiments of the present disclosure provide method and apparatus for MCS table switch. A method performed by a network device comprises determining that a terminal device supports a first modulation and coding scheme (MCS) and a second MCS. The method further comprises transmitting configuration information regarding a first bandwidth part associated with a first MCS table supporting the first MCS to the terminal device. The method further comprises transmitting configuration information regarding a second bandwidth part associated with a second MCS table supporting the second MCS to the terminal device. The first MCS table is different from the second MCS table.