LTE-A Uplink Signal Multiplexing for MIMO Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The conventional LTE system's single-codeword signal transmission method is inadequate for the LTE-A system's multi-codeword data transmission scenario, failing to simultaneously transmit multiple service data blocks and uplink control information over the PUSCH channel.
Innovation Solution
A signal sending method that performs signal multiplexing and channel interleaving on uplink control information and one service data block to generate a mixed data block, followed by signal spatial multiplexing with remaining service data blocks, allowing simultaneous transmission of multiple service data blocks and uplink control information over the PUSCH channel, with a modulation and coding scheme that prioritizes the first service data block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the conventional LTE single-codeword signal transmission method is used, then the transmission process is simple, but it cannot simultaneously transmit multiple service data blocks and uplink control information over the PUSCH channel in LTE-A system
Solution Approach 1:
The patent segments the service data blocks into different groups based on their MCS values. Service data blocks with higher MCS values are separated from those with lower MCS values, allowing different processing paths. This segmentation enables the system to handle multiple data blocks with different quality requirements simultaneously, resolving the contradiction between transmission capability and processing complexity.
Solution Approach 2:
The patent applies different modulation and coding schemes (MCS) to different service data blocks based on their channel quality. Each data block receives customized MCS parameters tailored to its specific requirements. This local quality approach allows optimal transmission for each data block while maintaining overall system efficiency, balancing productivity improvement with manageable complexity.
2Productivity
If multiple service data blocks with different MCS values are transmitted simultaneously, then the uplink spectral efficiency is improved, but the signal processing and resource allocation becomes more complex
Solution Approach 1:
The patent performs preliminary classification of service data blocks according to their MCS values before the actual transmission process. This preliminary action organizes the data blocks into distinct groups, simplifying subsequent processing operations. By preparing the data structure in advance, the system achieves high spectral efficiency while maintaining ease of operation through structured processing.
Solution Approach 2:
The patent dynamically adjusts the transmission parameters and processing operations based on the specific characteristics of each service data block. The system adapts its behavior according to the MCS values and channel conditions, enabling flexible and efficient transmission. This dynamic approach improves spectral efficiency while managing processing complexity through adaptive rather than fixed operations.
3Productivity
If the MIMO technique is introduced in LTE-A system, then the spectral bandwidth is increased, but the conventional single-codeword transmission method becomes inadequate
Solution Approach 1:
The patent creates a universal transmission method that can handle multiple service data blocks with different MCS values simultaneously over the PUSCH channel. This multi-functional approach makes the transmission system adaptable to various data block characteristics while maintaining compatibility with MIMO technology. The unified method resolves the inadequacy of single-codeword transmission by accommodating diverse transmission requirements within a single framework.
Solution Approach 2:
The patent utilizes parameter changes in the modulation and coding scheme (MCS) to adapt the transmission method to different data block requirements. By varying MCS parameters such as modulation order and coding rate, the system can efficiently transmit multiple data blocks with different quality needs. This parameter-based adaptability enables the system to leverage increased spectral bandwidth from MIMO while maintaining versatility across different transmission scenarios.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention provides a signal sending method, device, and system. The method includes: A sender performs signal multiplexing processing on a first service data block in service data blocks to be sent and uplink control information, and performs channel interleaving processing on mixed data generated after the signal multiplexing processing, to generate a mixed data block; the sender performs signal spatial multiplexing processing on the mixed data block and remaining service data blocks in the service data blocks to be sent except the first service data block to generate a spatially multiplexed signal, and then sends the spatially multiplexed signal to a receiver through a PUSCH channel. The present invention solves the problem of signal transmission over the PUSCH channel after a MIMO technique is introduced in an LTE-A system, so that the MIMO technique can be well applied to the LTE-A system, and an uplink transmission rate of the system is increased.