Uplink Control Multiplexing in NOMA Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving signals for non-orthogonal multiple access (NOMA) in 5G systems, particularly in managing resource overlaps between uplink control information and data transmission.
Innovation Solution
A method where user equipment (UE) determines whether resources allocated for uplink control information transmission overlap with those for uplink data transmission, and based on this determination, decides to multiplex the uplink control information with the uplink data using information about MA signature configuration and transmits the result.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink control information and uplink data are transmitted using separate orthogonal resources, then transmission reliability is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent combines uplink control information and uplink data transmission into a single resource allocation framework. By allowing control information to be multiplexed with data in the same time-frequency resources using NOMA techniques, the system achieves both reliable control transmission and efficient resource utilization, resolving the contradiction between separate orthogonal resource allocation and resource efficiency.
Solution Approach 2:
The patent changes the transmission parameters by introducing power domain separation for control information within the NOMA framework. Control information is transmitted with different power levels or signature sequences compared to data, enabling reliable detection while sharing the same physical resources, thus improving resource utilization without sacrificing reliability.
2Productivity
If non-orthogonal multiple access (NOMA) is implemented for uplink data transmission, then resource utilization efficiency is improved, but signal detection complexity increases
Solution Approach 1:
The patent segments the uplink transmission into distinct components: data transmission using NOMA and control information transmission using reference signals or dedicated signature sequences. This segmentation allows the receiver to process control information separately from data, reducing the overall detection complexity while maintaining high resource utilization efficiency through NOMA for data.
Solution Approach 2:
The patent introduces reference signals or specific signature sequences as intermediaries for control information transmission. These intermediaries provide a structured way to embed control information within the NOMA framework without requiring complex joint detection of all signals, thereby reducing receiver complexity while preserving the resource efficiency benefits of NOMA.
3Productivity
If control information is multiplexed with uplink data in overlapping resources, then resource utilization efficiency is improved, but interference between signals increases
Solution Approach 1:
The patent applies local quality by assigning different transmission characteristics to control information and data within the same resource block. Control information uses specific reference signals, signature sequences, or power levels that are locally optimized for reliable detection, while data uses standard NOMA modulation. This local differentiation reduces interference effects and enables successful multiplexing.
Data Source
AI summary
The disclosure relates to a method and apparatus for transmitting and receiving signals in a wireless communication system. A user equipment (UE) according to an embodiment of the disclosure may receive information about a resource for uplink (UL) control information transmission and MA signature configuration, determine based on the resource for UL control information transmission whether the resource allocated for the UL control information transmission overlaps a resource allocated for UL data transmission, determine whether to multiplex the UL control information when it is determined that the resource allocated for the UL control information transmission overlaps the resource allocated for UL data transmission, and based on a result of the determining, multiplex the UL control information with UL data based on the information about the MA signature configuration and transmit a result of the multiplexing.