Uplink Control Multiplexing Using Spectral-Efficiency Allocation
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Solution Overview
Problem
Wireless communication systems face challenges in effectively transmitting uplink signals and multiplexing control information with data, particularly in determining the optimal number of channel encoded symbols for control information to ensure efficient resource allocation and transmission quality.
Innovation Solution
A method and apparatus for transmitting uplink signals in a wireless communication system, where control information is channel-encoded and multiplexed with data blocks through channel interleaving, with the number of channel encoded symbols for control information determined using the inverse sum of spectral efficiencies for initial data block transmissions, ensuring effective resource allocation and transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control information is multiplexed with data blocks using channel interleaving, then resource allocation efficiency is improved, but determining the optimal number of channel encoded symbols becomes complex
Solution Approach 1:
The patent applies parameter changes by using the inverse sum of spectral efficiencies as a determining parameter for the number of channel encoded symbols. Specifically, the number of channel encoded symbols is calculated based on the formula involving 1/(SE1 + SE2 + ... + SEN), where SE represents spectral efficiency of each data block. This parameter transformation converts a complex optimization problem into a calculable parameter determination, resolving the contradiction between resource allocation efficiency and determination complexity.
2Reliability
If the number of channel encoded symbols for control information is increased, then transmission quality is improved, but resource usage efficiency deteriorates
Solution Approach 1:
The patent transforms the trade-off between transmission quality and resource efficiency by introducing spectral efficiency as a key parameter. The number of channel encoded symbols is determined dynamically based on the inverse sum of spectral efficiencies of data blocks, allowing the system to adaptively allocate resources. When spectral efficiency is high, fewer symbols are needed for control information, and vice versa, thus resolving the contradiction through parameter-based adaptive allocation.
Solution Approach 2:
The patent implements dynamic resource allocation where the number of channel encoded symbols for control information is not fixed but varies according to the spectral efficiency conditions of data blocks. This dynamic adjustment mechanism allows the system to optimize transmission quality while maintaining resource efficiency by adapting to changing channel conditions and data requirements.
3Productivity
If spectral efficiency is optimized for data transmission, then data throughput is improved, but control information transmission reliability may deteriorate
Solution Approach 1:
The patent resolves this contradiction through dynamic resource allocation based on spectral efficiency. The system calculates the number of channel encoded symbols for control information using the inverse sum of spectral efficiencies, ensuring that when data throughput is optimized (high spectral efficiency), appropriate resources are allocated to control information to maintain its reliability. This dynamic balancing act allows both data and control information to coexist optimally.
Solution Approach 2:
The patent incorporates feedback mechanisms by using spectral efficiency measurements of data blocks to determine control information resource allocation. The spectral efficiency values serve as feedback parameters that inform the resource allocation decision, creating a closed-loop system where control information transmission is adjusted based on actual data transmission performance, thus maintaining reliability while optimizing throughput.
Data Source
AI summary
A method and apparatus for transmitting an uplink signal in a wireless communication system are discussed. The method includes multiplexing control information in all layers with a plurality of data blocks of the uplink signal; and transmitting the uplink signal to a base station, wherein the number of modulation symbols per layer for the control information is determined using a reciprocal of a sum of spectral efficiencies for respective data blocks of the plurality of data blocks, and a spectral efficiency for a data block is obtained based on a ratio of a size of the data block to the number of resource elements (REs) for an initial physical uplink shared channel (PUSCH) transmission of the data block.