Uplink Control Information Symbol Allocation for LTE
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink control information due to limited resources, particularly in allocating sufficient symbols for control messages without compromising data transmission in LTE Release-10 and beyond, especially with SU-MIMO and multiple antennas.
Innovation Solution
The system determines the number of symbols for uplink control information based on equations that consider the number of subcarriers, symbols per subframe, and β offset values, allowing for proportional allocation across layers and codewords, and selects a codeword based on Modulation and Coding Scheme settings and HARQ status to minimize overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If more communication resources are allocated to increase communication speed, then communication speed is improved, but communication overhead consumption increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the number of symbols allocated for UCI based on the actual payload size and channel conditions. The system calculates the required number of symbols using formulas that consider modulation order, codeword size, and channel quality indicators, thereby optimizing the balance between communication speed and overhead consumption.
Solution Approach 2:
The patent implements dynamics by making the UCI symbol allocation adaptive rather than fixed. The system continuously monitors channel conditions and payload requirements to dynamically adjust the number of symbols allocated for control information, allowing the system to optimize performance in real-time based on actual communication needs.
2Reliability
If more symbols are allocated for uplink control information, then control message transmission reliability is improved, but data transmission resources are reduced
Solution Approach 1:
The patent uses parameter changes to optimize the symbol allocation by adjusting the number of UCI symbols based on actual channel conditions and payload requirements. The system calculates optimal symbol counts using formulas that consider modulation order, codeword size, and channel quality, ensuring sufficient reliability without excessive overhead that would reduce data transmission efficiency.
Solution Approach 2:
The patent applies partial action by allocating only the necessary number of symbols for UCI transmission rather than reserving maximum resources. The system calculates the minimum required symbols based on payload size and channel conditions, avoiding excessive allocation that would unnecessarily reduce data transmission resources while ensuring sufficient reliability for control messages.
3Device complexity
If fixed symbol allocation is used for uplink control information, then system complexity is reduced, but resource utilization efficiency is worsened
Solution Approach 1:
The patent resolves this contradiction by implementing parameter-based dynamic allocation that balances complexity and efficiency. The system uses standardized formulas and pre-configured parameters to calculate optimal symbol allocation, maintaining manageable system complexity while achieving superior resource utilization efficiency compared to fixed allocation methods.
Data Source
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AI summary
A wireless communication device configured for selecting a codeword and determining a symbol length for uplink control information is described. The wireless communication device includes a processor and instructions stored in memory. The wireless communication device establishes communication with a base station, receives downlink control information from the base station and receives base station information. The wireless communication device generates uplink control information based on the base station information. The wireless communication device also determines a number of symbols for the uplink control information for a plurality of layers and sends the uplink control information.