MIMO PUSCH Control Information Multi-Layer Transmission
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Solution Overview
Problem
Current 3GPP LTE uplink transmission methods are limited to single-layer PUSCH transmission, and there is a need for a new standard to accommodate multi-layer transmission of control information such as ACK/NACK, CQI/PMI, and RI in next-generation mobile communication technologies like LTE-advanced.
Innovation Solution
A method for transmitting control information using a multi-input multi-output (MIMO) antenna system, where CQI/PMI is sent using the same resources as specified in 3GPP TS 36.211 V.8.6.0 at one layer, and other layers either transmit data in the same resource positions or encode and transmit the CQI/PMI using different codes, allowing for interference reduction and efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control information is transmitted using only one layer in PUSCH region, then the transmission method is simple and compatible with existing standards, but the system cannot accommodate multi-layer transmission requirements for next-generation mobile communication technologies
Solution Approach 1:
The patent segments control information transmission across multiple layers by designating specific layers for control information (e.g., Layer 0 for CQI/PMI, Layer 1 for ACK/NACK) while other layers transmit data. This segmentation enables multi-layer control information transmission while maintaining structured organization and compatibility with existing single-layer methods.
Solution Approach 2:
The patent creates a universal transmission framework where PUSCH can operate in both single-layer mode (for legacy compatibility) and multi-layer mode (for advanced capabilities). The method allows flexible configuration where control information and data can be transmitted on different layers simultaneously, making the system adaptable to various deployment scenarios and future standards.
2Productivity
If multiple layers transmit control information using the same resources, then resource utilization is improved, but interference between layers increases
Solution Approach 1:
The patent applies local quality by assigning different resource allocations and transmission parameters to different layers. Specifically, control information on various layers uses different resource positions, modulation schemes, or coding rates tailored to their specific requirements, thereby reducing inter-layer interference while maintaining efficient resource utilization.
Solution Approach 2:
The patent introduces layer-specific reference signals and demodulation references as intermediary elements that facilitate reliable detection of control information on each layer. These intermediaries help distinguish between layers and reduce interference effects, enabling simultaneous multi-layer control information transmission.
Data Source
AI summary
Provided is a method of transmitting control information using a physical uplink shared channel (PUSCH) region in a system employing a multi-input multi-output (MIMO) antenna system in which transmission is performed through a plurality of layers. A method of transmitting a channel quality indicator (CQI)/precoding matrix indicator (PMI) using a PUSCH region in a system employing a MIMO antenna system in which transmission is performed through a plurality of layers includes encoding the CQI/PMI using one channel encoder, and transmitting the encoded CQI/PMI using some or all of the layers. Accordingly, it is possible to transmit uplink control information through a PUSCH region using a plurality of layers.