Uplink Control Information Encoding for Power Efficiency
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Solution Overview
Problem
In LTE-A systems, user equipment faces challenges in efficiently reporting channel state information and hybrid automatic repeat request acknowledgments across multiple downlink carriers, leading to inefficient power utilization due to excessive transmit power for high-performance requirements, which is not feasible for user equipment with limited power resources.
Innovation Solution
The method involves independent encoding and resource allocation for different types of uplink control information based on their performance target requirements, allowing each type to meet its specific performance targets without increasing transmit power for the highest requirement, thereby optimizing power utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all uplink control information is jointly encoded and transmitted with higher transmit power, then uplink control information with high performance target requirement can meet performance target, but transmit power is excessively high and power utilization is not high
Solution Approach 1:
The patent segments uplink control information into different types (first type and second type) with different performance target requirements, and applies different encoding schemes to each type. This allows high-priority information to receive enhanced protection while low-priority information uses standard encoding, avoiding the need to increase power for all information uniformly.
Solution Approach 2:
The patent applies different encoding qualities to different portions of uplink control information based on their specific performance requirements. First type information with high performance targets uses more robust encoding, while second type information with lower targets uses standard encoding, optimizing the overall power efficiency.
2Reliability
If user equipment increases transmit power to meet performance requirements, then uplink control information can be transmitted reliably, but user equipment with limited power resources cannot increase transmit power
Solution Approach 1:
The patent divides uplink control information into categories based on performance requirements, allowing the system to meet reliability targets for critical information without requiring all information to be transmitted at high power levels.
Solution Approach 2:
The patent changes the encoding parameters (code rate, redundancy) based on the performance target requirements of different information types, enabling reliable transmission of high-priority data at lower power levels while maintaining efficiency for lower-priority data.
3Reliability
If all uplink control information is independently encoded, then different types can meet their specific performance targets, but resource allocation complexity increases
Solution Approach 1:
The patent segments uplink control information into two types with distinct performance targets, enabling targeted encoding and resource allocation strategies that balance reliability requirements with implementation complexity.
Solution Approach 2:
The patent applies different encoding qualities and resource allocation rules to different information types locally, rather than uniformly across all control information, optimizing the trade-off between reliability and complexity.
Data Source
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AI summary
The present invention discloses a control information sending method, a control information receiving method, user equipment, and a network device. The sending method includes: obtaining a resource occupied by first uplink control information UCI, and obtaining a resource occupied by second UCI; performing channel encoding on the first UCI according to the resource occupied by the first UCI, to obtain an encoded bit sequence of the first UCI, and performing channel encoding on the second UCI according to the resource occupied by the second UCI, to obtain an encoded bit sequence of the second UCI; mapping the encoded bit sequence of the first UCI and the encoded bit sequence of the second UCI to a physical uplink channel; and sending the physical uplink channel. In this way, different UCI meets respective performance target requirements, and transmit power is not increased according to UCI with a highest performance requirement, thereby improving power utilization.