PUSCH UCI Multiplexing with Segmented UL-SCH Blocks
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting and multiplexing uplink control information (UCI) due to the increasing demand for wireless data traffic and the need for improved radio interface efficiency and coverage, particularly in 5G/NR communication systems operating in higher frequency bands.
Innovation Solution
A user equipment (UE) organizes UCI into N UCI type blocks, encodes and rate matches them, multiplexes with an uplink shared channel (UL-SCH) transport block, and segments and concatenates to generate block B, which is then mapped to resource elements of a physical uplink shared channel (PUSCH) for transmission. The base station receives and processes this block to extract and decode the UCI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UCI is transmitted using traditional methods in 5G/NR systems, then coverage can be maintained, but radio interface efficiency and data rates deteriorate due to increasing wireless data traffic demand
Solution Approach 1:
The UCI transmission is segmented into multiple PUSCH transmissions across different time slots. The transport block containing UCI is divided and transmitted in multiple segments, allowing efficient utilization of available resources and improving radio interface efficiency to handle increasing data traffic demand.
Solution Approach 2:
The system dynamically adapts the UCI transmission strategy based on channel conditions and traffic requirements. The base station can configure different PUSCH transmission parameters including frequency hopping, redundancy versions, and transmission timing to optimize efficiency under varying load conditions.
2Productivity
If UCI transmission is optimized for higher data rates, then productivity improves, but coverage and transmission reliability worsen in higher frequency bands
Solution Approach 1:
The system performs preliminary actions by configuring multiple redundancy versions and preparing multiple PUSCH transmission opportunities before actual UCI transmission. This allows the UE to transmit the same UCI data across multiple time slots with different redundancy versions, ensuring reliable delivery even in challenging higher frequency band conditions while maintaining high data rates.
Solution Approach 2:
The transmission parameters are dynamically changed across different PUSCH transmissions, including modulation and coding schemes, redundancy versions, and frequency resources. This parameter variation allows the system to adapt to channel conditions in higher frequency bands, maintaining both high data rates and reliable coverage.
3Productivity
If UCI is multiplexed with UL-SCH transport block, then transmission efficiency improves, but processing complexity increases at both UE and base station
Solution Approach 1:
The PUSCH is designed to serve multiple functions simultaneously - it can carry both UL-SCH data and UCI control information in the same transmission resource. This multi-functionality allows efficient multiplexing where a single physical channel handles both data and control planes, improving transmission efficiency while the standardized processing procedures keep complexity manageable.
4Reliability
If multiple PUSCH transmissions are used for UCI, then transmission reliability improves, but time resources and processing overhead increase
Solution Approach 1:
The system uses partial repetition of UCI across multiple PUSCH transmissions rather than complete redundant transmissions. By using different redundancy versions and allowing early termination when UCI is successfully decoded, the system achieves high reliability without fully utilizing all time resources, thus avoiding excessive time consumption.
Data Source
AI summary
Methods and apparatuses for uplink (UL) control information transmission and multiplexing. A method of operating a user equipment (UE) includes determining uplink control information (UCI), which is organized into N UCI type blocks, where N≥1 and each of the N UCI type blocks include one or more UCIs, determining an uplink shared channel (UL-SCH) transport block, and encoding and rate matching each of the encoded and rate matched N UCI type blocks. The method further includes multiplexing the N UCI type blocks with the UL-SCH transport block to generate block A, segmenting, encoding, rating match and concatenating block A to generate block B, mapping block B to resource elements of a physical uplink shared channel (PUSCH), and transmitting the PUSCH.