UE-Triggered Uplink Transmissions via PUCCH-PUSCH Selection
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Solution Overview
Problem
Existing uplink configured grants in 5G wireless communications are inefficient for unpredictable or aperiodic UE communications, leading to scheduling delays and inefficiencies in data transmission and status reporting, particularly in 6G radio access technology scenarios.
Innovation Solution
A UE-triggered mechanism for uplink configured grants is introduced, allowing user equipment to dynamically select and transmit uplink communications based on conditions such as the arrival of uplink data or status reporting, using PUCCH and PUSCH resources configured for dynamic and unpredictable communication needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network-controlled configured grants are used for uplink transmissions, then resource allocation is standardized and manageable, but scheduling delays increase and efficiency decreases for unpredictable UE communications
Solution Approach 1:
The UE autonomously selects and transmits uplink communications on configured grant resources without requiring network scheduling decisions. The UE self-determines which PUSCH resources to use based on locally stored configurations and transmission conditions, eliminating the need for network-controlled scheduling and thereby reducing scheduling delays while improving transmission efficiency for unpredictable communications
2Adaptability or versatility
If traditional network-controlled scheduling is used, then centralized resource management is maintained, but responsiveness to unpredictable or aperiodic UE communications deteriorates
Solution Approach 1:
The resource allocation function is segmented between network configuration and UE execution. The network provides pre-configured PUSCH resource pools through RRC signaling, while the UE independently manages resource selection and transmission decisions. This segmentation enables rapid response to unpredictable communications by pushing decision-making to the UE edge, while maintaining manageable complexity through standardized network configuration procedures
3Productivity
If PUCCH resources are used for activation indications, then control channel capacity is utilized, but resource conflicts may occur with other uplink transmissions
Solution Approach 1:
The PUCCH serves as an intermediary control channel that carries activation indications for PUSCH resources without carrying user data. The patent establishes clear separation between control plane (PUCCH for activation indications) and user plane (PUSCH for data transmission), preventing resource conflicts while maintaining reliable transmission through dedicated control channel resources that are independently managed from data channels
Data Source
AI summary
Various aspects of the present disclosure relate to user equipment (UE) triggered uplink configured grants. For example, the UE may be configured with a uplink grant configuration, which indicates a set of physical uplink control channel (PUCCH) resources and a set of physical uplink shared channel (PUSCH) resources, where the set of PUCCH resources are used based on one or more conditions (e.g., the arrival of uplink data or status reporting) associated with triggering the use of an uplink configured grant. In response to the trigger, the UE may select a PUSCH resource, transmit an indication of the selected PUSCH resource via a PUCCH resource, and transmits an uplink communication (e.g., the uplink data or status report) via the selected PUSCH resource.