Uplink Control Information Multiplexing via Orthogonal Spreading
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting uplink control information for different data service types, such as enhanced Mobile Broadband (eMBB) and ultra-reliable and low-latency communications (URLLC), due to differences in control channel format lengths and latency requirements, leading to overlapping and conflicting transmission issues.
Innovation Solution
A method where a user device multiplies uplink control information associated with different control channel format lengths using distinct orthogonal signals, allowing for parallel transmission of these signals over shared resource blocks, and in cases of overlap, drops portions of one signal to prioritize the other, ensuring simultaneous transmission without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink control information for different data service types (eMBB and URLLC) is transmitted using different control channel format lengths, then the specific latency and reliability requirements of each service type can be met, but transmission conflicts and overlaps occur when multiple control channels need to be transmitted simultaneously
Solution Approach 1:
The control channel transmission is segmented by service type, with eMBB control information and URLLC control information transmitted separately using different PUCCH format lengths. This segmentation allows each service type to maintain its specific requirements while avoiding direct conflict through orthogonal resource allocation.
Solution Approach 2:
The patent introduces a new dimension for resource allocation by using different PUCCH format lengths (short format for URLLC, long format for eMBB) and combining them with frequency-domain orthogonal resources. This dimensional approach allows simultaneous transmission of multiple control channels without interference.
2Productivity
If multiple uplink control signals are transmitted simultaneously over shared resource blocks, then resource utilization efficiency is improved, but signal interference and detection difficulty increase
Solution Approach 1:
Different local qualities are applied to different control signals by using distinct PUCCH formats (short vs. long) and assigning them to different frequency resources. This local differentiation ensures that each control signal maintains its detectability while sharing the overall resource pool, resolving the contradiction between efficiency and detection difficulty.
3Device complexity
If control channel format lengths are standardized, then system complexity is reduced, but flexibility to meet diverse service requirements (latency, reliability) is limited
Solution Approach 1:
The system dynamically selects appropriate PUCCH formats based on service type requirements. URLLC traffic triggers short PUCCH format for low latency, while eMBB traffic uses long PUCCH format for higher reliability. This dynamic adaptation allows the system to balance complexity and versatility by only activating specific formats when needed.
Data Source
AI summary
A technique includes multiplying, by a user device, a first uplink control information, associated with a first control channel format length, with a first orthogonal signal to obtain a first spread control signal, multiplying, by the user device, a second uplink control information, associated with a second control channel format length, with a second orthogonal signal that is different than the first orthogonal signal to obtain a second spread control signal, the second control channel format length being different than the first control channel format length, receiving, by the user device, a first resource grant indicating one or more resource blocks for uplink transmission, the first resource grant associated with or provided for the first uplink control information, and transmitting, by the user device, at least partially simultaneously via the one or more resource blocks, the first spread control signal and the second spread control signal.