Short PUCCH Resource Request Signaling via Subcarrier Groups
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Solution Overview
Problem
The challenge in 5G NR is how to effectively carry a resource request (SR) in the short Physical Uplink Control Channel (PUCCH) without compromising the performance of 5G technology, as existing designs in 4G LTE may require sacrificing flexibility, leading to reduced 5G performance.
Innovation Solution
The method involves transmitting a resource request by user equipment (UE) using a first sequence or subcarrier group to indicate the SR, either through frequency division or code division, where different subcarrier groups are used to distinguish between SR transmission and regular physical uplink control signaling, allowing the base station to accurately receive and process the SR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If 4G LTE designs are used to ensure backward compatibility, then system compatibility is improved, but 5G performance is reduced
Solution Approach 1:
The patent segments the uplink control information into different types (ACK/NACK, CSI, SR) and assigns them to different resource allocation schemes. SR uses dedicated periodic resources while ACK/NACK and CSI use dynamic grant-based resources, allowing 5G-specific optimizations without being constrained by 4G LTE unified structures.
Solution Approach 2:
The patent introduces dynamic resource allocation for uplink control signaling in 5G NR, where resources can be flexibly configured and adjusted based on traffic conditions. The base station can dynamically grant resources for ACK/NACK and CSI transmissions, and UE can dynamically send SR when needed, providing adaptability that maintains high 5G performance while ensuring compatibility through standardized interfaces.
2Productivity
If short PUCCH is used in the last one to two symbols, then transmission efficiency is improved, but SR carrying capability becomes problematic
Solution Approach 1:
The patent extracts SR functionality from the short PUCCH structure by dedicating specific periodic uplink resources solely for SR transmission. This separation allows short PUCCH to focus on efficient ACK/NACK and CSI transmission in the last one to two symbols, while SR uses independently configured resources, simplifying the overall mechanism.
Solution Approach 2:
The patent creates a universal uplink resource allocation framework where the same physical channel structure can carry different types of control information (SR, ACK/NACK, CSI) depending on configuration. The base station configures specific resources for SR that can be universally applied across different UE scenarios, while maintaining the short PUCCH format for efficient control signaling.
3Measurement precision
If frequency division or code division is used to differentiate SR, then SR identification accuracy is improved, but resource utilization efficiency may be reduced
Solution Approach 1:
The patent applies frequency division by allocating specific frequency resources (subcarrier groups) dedicated to SR transmission within the uplink bandwidth. This local quality differentiation ensures that SR signals are clearly identifiable in specific frequency regions without interfering with other control signaling, achieving high identification accuracy while maintaining overall resource efficiency through targeted allocation.
Data Source
AI summary
Embodiments of this application provide a resource request sending method, user equipment, and a base station, and relate to the communications field, to resolve a problem about how a short PUCCH carries an SR. The method includes: transmitting, by user equipment UE, a first sequence on a resource used to transmit physical uplink control signaling, to carry the physical uplink control signaling and indicate a resource request SR; or transmitting, by user equipment UE, physical uplink control signaling and indicating a resource request SR by using a first subcarrier group on a resource used to transmit the physical uplink control signaling. The embodiments of this application are applied to a scenario in which physical uplink control signaling carries an SR.