HP and LP UCI Multiplexing via Modulation Order and MIMO Layer Differentiation
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently multiplexing high priority (HP) and low priority (LP) uplink control information (UCI) using different modulation orders and MIMO layers, which affects transmission efficiency and priority handling.
Innovation Solution
The system employs a method to multiplex HP UCI with LP UCI by adjusting modulation orders and MIMO layers, where the HP UCI has a greater or equal modulation order and number of MIMO layers than LP UCI, and signals this configuration to user equipment (UE) for transmission to a base station, allowing for effective priority management and optimized resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If different modulation orders and MIMO layers are used for HP and LP UCI multiplexing, then transmission efficiency and priority handling are improved, but system complexity increases
Solution Approach 1:
The patent segments UCI into different priority levels (HP and LP) and applies different modulation orders and MIMO layer configurations to each segment. This allows independent optimization of transmission parameters for each priority class, improving overall transmission efficiency while managing complexity through structured differentiation.
Solution Approach 2:
The patent applies local quality by assigning different modulation orders (e.g., QPSK for HP, 16QAM for LP) and different numbers of MIMO layers to different priority levels of UCI. This localized parameter assignment optimizes transmission performance for each priority class according to its specific requirements rather than using uniform parameters system-wide.
2Reliability
If higher modulation order is assigned to HP UCI, then reliability of high priority data is improved, but resource utilization efficiency decreases
Solution Approach 1:
The patent changes modulation order parameters based on UCI priority. HP UCI is assigned more robust modulation schemes (lower modulation order like QPSK) that provide better error performance and reliability, while LP UCI uses higher spectral efficiency schemes (higher modulation order like 16QAM or 64QAM). This parameter adaptation resolves the contradiction by matching modulation characteristics to priority requirements.
Solution Approach 2:
The patent implements dynamic parameter assignment where modulation order and MIMO layer configuration are adjusted based on the priority level of UCI being transmitted. This dynamic adaptation allows the system to optimize reliability for HP UCI while maintaining resource efficiency through appropriate parameter selection for each transmission instance.
3Reliability
If more MIMO layers are allocated to HP UCI, then transmission reliability is improved, but available resources for LP UCI are reduced
Solution Approach 1:
The patent segments the total available MIMO layers into different allocations for HP and LP UCI based on priority requirements. HP UCI receives a guaranteed minimum number of layers for reliability, while LP UCI utilizes remaining layers. This segmented allocation resolves the contradiction by ensuring HP reliability while preserving resources for LP transmissions.
Solution Approach 2:
The patent changes the number of MIMO layers parameter dynamically based on UCI priority and channel conditions. For HP UCI, more layers are allocated to improve spatial diversity and reliability through MIMO techniques. For LP UCI, fewer layers are used to conserve resources. This parameter adaptation balances reliability requirements with resource availability.
Data Source
AI summary
A UE may multiplex first UCI of a first priority with second UCI of a second priority. The first UCI may include at least one of a first modulation order or a first number of MIMO layers, and the second UCI may include at least one of a second modulation order or a second number of MIMO layers. The first modulation order of the first UCI may be greater than or equal to the second modulation order of the second UCI, and the first number of MIMO layers of the first UCI may be greater than or equal to the second number of MIMO layers of the second UCI. The UE may transmit, to a base station, an UL transmission including the first UCI of the first priority multiplexed with the second UCI of the second priority, where the second priority corresponds to a higher priority than the first priority.