Multi-Antenna Channel Interleaving for Low-CM Layer Multiplexing
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Solution Overview
Problem
Current multi-antenna wireless communication systems face challenges in efficiently multiplexing data and control information for channel interleaving, particularly in supporting multiple layers of transmission.
Innovation Solution
A method and apparatus for channel interleaving in a multi-antenna wireless communication system, where channel quality indicator (CQI) information and coded data are configured as vectors, and coded rank indicator (RI) and acknowledgement (ACK)/negative ACK (NACK) information are repeated and scrambled to generate input vector sequences, which are then mapped to an interleaver matrix and read column-wise to produce an output vector sequence, defined by the product of modulation order and the number of transmission layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data and control information are multiplexed using conventional methods, then transmission can be performed, but the multiplexing efficiency is insufficient and cubic metric is high in multi-layer transmission
Solution Approach 1:
The patent segments the multiplexing process by separately handling data and control information through distinct mapping procedures. Data is mapped to resource elements while control information (CQI, ACK/NACK, RI) is mapped to specific resource elements in a structured manner, allowing efficient multi-layer transmission without excessive complexity
Solution Approach 2:
The patent introduces a new dimension for resource element mapping by utilizing multiple layers (spatial dimension) and structured resource element allocation patterns. This allows the system to achieve better multiplexing efficiency by distributing information across multiple spatial layers and resource elements, thereby reducing the cubic metric through optimized spatial-frequency-time resource utilization
2Adaptability or versatility
If channel interleaving is performed without optimized vector configuration, then transmission can proceed, but the support for multiple transmission layers is insufficient
Solution Approach 1:
The patent creates a universal channel interleaving framework that can handle multiple types of information (data, CQI, ACK/NACK, RI) across multiple transmission layers using a unified vector configuration approach. The method defines vector sequences that are repeatedly configured based on the number of transmission layers, enabling the system to adapt to different layer configurations while maintaining reliable interleaving performance through consistent mapping rules
Solution Approach 2:
The patent dynamically adjusts the vector configuration parameters based on the number of transmission layers. The vector sequence is repeatedly configured according to the layer count, and the mapping to resource elements is adjusted accordingly. This parameter adaptation allows the system to maintain optimal interleaving performance across different multi-layer transmission scenarios
Data Source
AI summary
A method and user equipment (UE) for transmitting a signal to a base station in a multi-antenna wireless communication system are discussed. The method can include mapping interleaver input vector sequences to an interleaver matrix, wherein each of the interleaver input vector sequences comprises vectors having a bit size of NL·Qm, wherein Qm is a modulation order and NL is a number of transmission layers, reading out the interleaver matrix column by column for obtaining output bit sequences, and transmitting the output bit sequences through the transmission layers to the base station.