Sub-band UCI Multiplexing on PUSCH for 5G Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting uplink control signals in mobile communication systems, particularly in managing sub-bands and multiplexing uplink control information (UCI) on the physical uplink shared channel (PUSCH).
Innovation Solution
The proposed solution involves a method where a user equipment (UE) receives configuration for one or more sub-bands and downlink control information (DCI) scheduling a physical uplink shared channel (PUSCH) from a base station. The UE identifies a sub-band for UCI among the configured sub-bands and multiplexes the UCI on the PUSCH based on that sub-band, before transmitting the PUSCH back to the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE transmits UCI on PUSCH without sub-band multiplexing, then the transmission process is simple, but the sub-band management efficiency and signal quality are reduced
Solution Approach 1:
The patent divides the frequency band into multiple sub-bands and assigns specific sub-bands to different UCI types (e.g., HARQ-ACK, CSI, SR). This segmentation allows efficient sub-band management by dedicating specific frequency resources to specific control information types, improving productivity while maintaining manageable complexity through standardized mapping rules.
Solution Approach 2:
The patent applies different transmission parameters and resource allocation strategies to different sub-bands based on their specific requirements. Each sub-band is configured with appropriate modulation schemes, coding rates, and power settings tailored to the specific UCI type being transmitted, optimizing local signal quality without requiring system-wide complexity.
2Reliability
If the UE transmits UCI on PUSCH without sub-band identification, then the transmission process is simple, but the signal quality and transmission efficiency are reduced
Solution Approach 1:
The base station performs preliminary configuration of sub-band mappings and transmission parameters before the actual UCI transmission. The UE receives pre-configured information about which sub-bands correspond to which UCI types, allowing reliable transmission without complex real-time identification. This preliminary setup ensures reliability while minimizing the complexity burden on the UE during actual transmission.
Solution Approach 2:
The patent incorporates feedback mechanisms where the base station monitors the transmission quality of UCI on different sub-bands and adjusts transmission parameters accordingly. This feedback loop enables the system to maintain high reliability by adapting to channel conditions, while the feedback information is transmitted efficiently using established control channels without adding significant complexity.
3Productivity
If the UE does not multiplex UCI on PUSCH based on sub-band, then the transmission process is simple, but the uplink control signal transmission efficiency is reduced
Solution Approach 1:
The patent creates a universal framework where the same PUSCH transmission mechanism can handle multiple UCI types simultaneously through sub-band multiplexing. The base station configures a unified set of rules that apply to all UCI types, allowing efficient multiplexing without requiring separate handling procedures for each type. This universality improves productivity while maintaining operational simplicity through standardized processing.
Solution Approach 2:
The patent optimizes transmission efficiency by dynamically adjusting key parameters such as modulation order, coding rate, and power settings based on the specific sub-band and UCI type being transmitted. These parameter changes are applied systematically according to pre-defined tables and rules, improving productivity without complicating operations, as the UE simply needs to follow the configured parameter mapping rather than perform complex calculations.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. In addition, the disclosure relates to operations of a UE and base station in a wireless communication system. Specifically, the disclosure relates to a method for transmitting an UL control signal by a UE and an apparatus capable of performing the same. The disclosure provides a subband-based transmission method in a wireless communication system.