Single User Superposition Transmission for 5G MIMO Throughput
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Solution Overview
Problem
Current 5G NR MIMO systems face performance limitations due to the use of a single codeword, which leads to inefficient data transmission and reduced throughput, as the network schedules MCS based on the minimum or average SINR of all layers, unaware of layers with higher SINR.
Innovation Solution
Implementing single user super positioning by using multiple downlink control channels to schedule and configure multiple data channels with different DMRS ports and beamforming matrices, allowing for increased transmission rank and efficient resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single codeword is used for MIMO transmission, then device complexity is reduced, but productivity (throughput) deteriorates due to inefficient resource utilization and inability to optimize per-layer SINR
Solution Approach 1:
The patent segments the downlink transmission into multiple data channels (first data channel and second data channel), each with its own codeword and control channel. This allows independent optimization of each layer's transmission parameters based on its specific SINR conditions, thereby improving overall throughput while managing complexity through structured segmentation
Solution Approach 2:
The patent introduces an additional dimension by using multiple downlink control channels (first downlink control channel and second downlink control channel) to schedule multiple data channels. This dimensional expansion enables the system to optimize each layer independently rather than being constrained by a single codeword, thus improving productivity
2Productivity
If MCS is scheduled based on minimum or average SINR of all layers, then ease of operation is improved, but productivity deteriorates because layers with higher SINR are not optimized
Solution Approach 1:
The patent applies local quality by configuring different modulation and coding schemes (MCS) for each data channel based on its specific SINR characteristics. The first data channel can use one MCS while the second data channel uses another MCS optimized for its conditions, allowing each layer to operate at optimal efficiency rather than being constrained by a uniform scheduling approach
Solution Approach 2:
The patent changes the scheduling parameter from a single aggregate SINR value to multiple layer-specific SINR values. By determining MCS for each data channel based on its individual SINR rather than the minimum or average, the system dynamically adjusts transmission parameters to maximize overall data transmission efficiency
Data Source
AI summary
A base station device can transmit data via multiple data channels to a single user equipment device. Each of the multiple data channels can be configured and scheduled via respective downlink control channels to the user equipment device. In an embodiment, the downlink control information and data can be processed in the transmitter via separate coding structures, and then the separate channel data can be combined for transmission to the mobile equipment. The data channels can use overlapping resource elements, and the receiver can use interference cancellation to remove interference from the subsequent data channel after decoding the data from the first data channel. In other embodiments, the data channels can be associated with different beamforming matrices, demodulation reference signal ports, constellation points and resource elements.