Wireless Resource Allocation Using Shared Sequences for NACKs and SRs
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Solution Overview
Problem
Existing 5G NR wireless communication networks face challenges in efficiently allocating resources for uplink signals with different levels of negative acknowledgement (NACK) and scheduling requests (SR) to meet varying reliability requirements, leading to high overhead and potential delays in data transmission.
Innovation Solution
Implementing a method to allocate channel resources for multi-level NACKs and scheduling requests (SR) by using different sequence resources, where each level of NACK is associated with specific CQI offsets, target BLER levels, and SINR values, allowing for efficient resource allocation based on varying reliability needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different reliability requirements are applied to initial data transmissions or retransmissions during HARQ processes by reporting CQI index values corresponding to different target levels, then the reliability of data transmission is improved, but the overhead increases and delay becomes too long
Solution Approach 1:
The patent segments the NACK signal into multiple levels (first level NACK and second level NACK) to represent different reliability requirements. This segmentation allows the system to differentiate between various error conditions without requiring extensive CQI reporting, thereby reducing overhead and delay while maintaining improved reliability through targeted retransmission strategies.
2Reliability
If different reliability requirements are applied to initial data transmissions or retransmissions during HARQ processes by reporting CQI index values corresponding to different target levels, then the reliability of data transmission is improved, but the overhead increases
Solution Approach 1:
The patent extracts the reliability differentiation function from the CQI reporting mechanism and embeds it directly into the NACK signal structure. By encoding multiple reliability levels within the NACK signal itself (through different sequence resources or cyclic shifts), the system eliminates the need for separate CQI reports for each reliability level, thereby reducing signaling overhead while maintaining the ability to apply different reliability requirements.
3Device complexity
If no research has been conducted regarding allocating different resources for transmission of uplink signals for different levels of NACK, then the system complexity is reduced, but the spectrum efficiency decreases
Solution Approach 1:
The patent introduces a new dimension for resource allocation by utilizing different sequence resources or cyclic shifts within the PUCCH format 2 structure. This dimensional approach allows multiple NACK levels to be transmitted using the same time-frequency resources but with distinct sequence characteristics, thereby improving spectrum efficiency without significantly increasing system complexity as the base PUCCH structure remains unchanged.
4Ease of operation
If no research has been conducted regarding how to allocate resources for carrying scheduling requests (SR) on PUCCH signals based on sequence resources, then the ease of operation is maintained, but the resource allocation efficiency decreases
Solution Approach 1:
The patent makes the PUCCH sequence resources universal by enabling them to carry multiple functions: normal ACK/NACK feedback, multi-level NACK for different reliability requirements, and scheduling requests (SR). By encoding SR information within the same sequence resource framework using specific cyclic shift patterns or resource selections, the system achieves multi-functionality without requiring separate dedicated resources for SR, thereby improving resource allocation efficiency while maintaining ease of operation through unified handling.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Methods and system for transmitting a scheduling request simultaneously with HARQ-ACK messages are disclosed. In one embodiment, a method performed by a first communication node, includes: allocating N resources for transmitting a scheduling request from a second communication node to the first communication node, wherein at least one resource is allocated for transmitting the scheduling request only and also for transmitting a HARQ-ACK message and the scheduling request simultaneously, wherein N is a positive integer.