Uplink Control Information Transmission via Slot-Specific Orthogonal Sequences
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting uplink control information, particularly due to limitations in subframe timing and resource allocation, which affect the reliability and effectiveness of control channels.
Innovation Solution
The method involves mapping uplink control information to available symbols in specific slots of a subframe and applying orthogonal sequences corresponding to the number of symbols in each slot, ensuring efficient transmission by optimizing the use of resources and maintaining orthogonality even with punctured symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink control information is mapped to available symbols in slots of a subframe with punctured symbols, then resource allocation efficiency is improved, but maintaining orthogonality becomes more difficult
Solution Approach 1:
The subframe is divided into two slots, and each slot is further divided into multiple symbols. The patent selectively maps uplink control information to specific available symbols within each slot, excluding punctured symbols. This segmentation allows efficient resource utilization by precisely controlling where control information is placed, while maintaining orthogonality within each segment (slot) through dedicated orthogonal sequences.
Solution Approach 2:
Different orthogonal sequences are applied to different slots based on the local characteristics of each slot (number of available symbols, punctured symbol positions). The patent applies a first orthogonal sequence to the first slot and a second orthogonal sequence to the second slot, where each sequence is specifically designed to maintain orthogonality given the local symbol availability in that slot.
2Reliability
If orthogonal sequences are applied to uplink control information in each slot, then transmission reliability is improved, but system complexity increases
Solution Approach 1:
The patent applies orthogonality separately within each slot using dedicated orthogonal sequences, rather than attempting to maintain orthogonality across the entire subframe. This segmentation reduces the complexity of sequence design and application, as each slot can be processed independently with its own orthogonal sequence, while still achieving reliable transmission through the orthogonality property.
3Productivity
If uplink control information is transmitted considering subframe timing and symbol availability, then transmission efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent performs preliminary identification of available symbols and determination of orthogonal sequences before actual uplink control information transmission. By pre-processing the subframe structure, identifying punctured symbols, and selecting appropriate orthogonal sequences in advance, the system optimizes transmission efficiency without adding significant real-time processing complexity during the actual transmission phase.
Data Source
Figure 1
Figure 2A~2A(b)
Figure 2B
AI summary
The present invention relates to a method for a receiving terminal to transmit uplink control information to a transmitting terminal in a wireless communication system. In more detail, the method for transmitting the uplink control information includes: mapping the uplink control information into at least one available symbol included in each of a first slot and a second slot of a specific subframe; applying a first orthogonal sequence corresponding to the first slot to the uplink control information mapped into the first slot and a second orthogonal sequence corresponding to the second slot to the uplink control information mapped into the second slot; and transmitting the uplink control information having the orthogonal sequence applied to the transmitting terminal. The first orthogonal sequence corresponds to the number of available symbols in the first slot and the second orthogonal sequence corresponds to the number of available symbols in the second slot.