Uplink Control Signaling Transmission on PUSCH with Spatial Division Multiplexing
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Solution Overview
Problem
The existing technologies do not provide a scheme for transmitting uplink control signaling on the Physical Uplink Shared Channel (PUSCH) while it uses spatial division multiplexing in the LTE-A system.
Innovation Solution
A system and method that includes an encoding module, selecting module, interleaving module, and transmitting module to encode and transmit uplink control signaling on the PUSCH, using techniques such as multiplexing, mapping, and channel interleaving to manage the transmission of ACK/NACK, RI, and CQI/PMI information, even when spatial division multiplexing is employed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spatial division multiplexing is used on PUSCH to increase transmission rate, then uplink transmission capacity is improved, but no scheme exists for transmitting uplink control signaling on PUSCH with spatial division multiplexing
Solution Approach 1:
The patent segments the uplink control signaling into different types (ACK/NACK, CQI, PMI, RI) and assigns different handling methods to each type when spatial division multiplexing is used. Specifically, ACK/NACK signaling is transmitted on one codeword stream while data is transmitted on another, allowing control signaling to be accommodated within the spatial division multiplexing framework without interfering with the high-rate data transmission capability.
Solution Approach 2:
The patent introduces a new dimension for control signaling transmission by utilizing the codeword stream dimension in spatial division multiplexing. Instead of trying to fit control signaling into the existing single-dimension PUCCH format, the invention maps control signaling to specific codeword streams (e.g., first codeword stream for ACK/NACK, second codeword stream for data), thereby resolving the contradiction between maintaining spatial division multiplexing benefits and enabling control signaling transmission.
2Productivity
If uplink control signaling is transmitted on PUSCH with spatial division multiplexing, then control and data information can be communicated simultaneously, but the mapping relation from codeword stream to layer becomes complex
Solution Approach 1:
The patent applies local quality by assigning different transmission characteristics to different parts of the control signaling. Specifically, ACK/NACK signaling is mapped to the first codeword stream with specific modulation and coding parameters, while CQI/PMI/RI are mapped to the second codeword stream with different parameters. This localized differentiation simplifies the overall mapping relation by creating clear, distinct rules for each signaling type rather than requiring a single complex mapping rule for all control signaling.
Solution Approach 2:
The patent establishes preliminary mapping rules for control signaling before the actual transmission occurs. The mapping relations between codeword streams and layers are pre-defined based on the transmission mode and spatial division multiplexing configuration. This preliminary action simplifies the real-time processing by eliminating the need for dynamic, complex mapping decisions during transmission, thereby reducing device complexity while maintaining high communication efficiency.
Data Source
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AI summary
A method for transmitting an uplink control signaling on a physical uplink shared channel is provided in the present invention, and the method includes: respectively encoding the uplink control signaling and data information corresponding to a transmission block needed to be transmitted, and truncating the corresponding encoded information according to a target length; and when one transmission block corresponds to a plurality of layers, interleaving the information on various layers to be transmitted on the transmission block, and transmitting the interleaved information on a layer corresponding to the Physical Uplink Shared Channel (PUSCH); wherein the information on various layers includes uplink control signaling information, or the information on various layers includes the data information and the uplink control signaling information. The invention also provides a system for transmitting an uplink control signaling on a physical uplink shared channel, and the system includes a encoding module, an interleaving module and a transmitting module. The invention can implement the transmission of the uplink control signaling on the PUSCH when the PUSCH adopts space division multiplexing in an LTE-A system.