Uplink Pre-Emption Indicators for Reliable PUSCH Resource Sharing
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Solution Overview
Problem
Future wireless communications networks face challenges in efficiently managing communications resources to accommodate diverse devices with varying data traffic profiles, particularly when high-priority transmissions like URLLC preempt lower-priority transmissions, leading to interference and decoding issues.
Innovation Solution
Implementing an uplink pre-emption indicator system that adjusts communications parameters in response to resource pre-emption, using a reference region-based bitmap to manage both dynamic and configured grant PUSCH transmissions, ensuring efficient resource utilization and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink communications resources are allocated for high-priority transmissions (e.g., URLLC), then transmission reliability and latency performance improve, but interference to lower-priority transmissions occurs and resource utilization efficiency deteriorates
Solution Approach 1:
The network applies preliminary anti-action by sending an uplink pre-emption indicator to the first communications device before the actual pre-emption occurs. This indicator informs the device that its allocated uplink resources will be preempted by a second device, allowing the first device to adjust or cancel its transmission in advance, thereby preventing interference while enabling high-priority transmissions
2Adaptability or versatility
If uplink pre-emption is implemented to support diverse data traffic profiles, then adaptability improves, but system complexity increases due to additional signaling and resource management
Solution Approach 1:
The uplink pre-emption indicator acts as an intermediary mechanism between the network and communications devices. It provides a standardized signaling interface that enables flexible resource pre-emption for different traffic types (eMBB, URLLC, mMTC) without requiring complex device-side resource management logic, thus improving adaptability while controlling system complexity
3Productivity
If communications parameters are adjusted in response to pre-emption indicators, then resource utilization efficiency improves, but processing requirements and complexity increase
Solution Approach 1:
The network performs preliminary action by sending the uplink pre-emption indicator before the pre-empted device completes its transmission. This allows the device to adjust communications parameters (such as canceling transmission or reducing power) in advance, improving resource utilization efficiency while keeping processing requirements manageable through straightforward parameter adjustment based on the received indicator
Data Source
AI summary
A method of operating a communications device for transmitting data to or receiving data from an infrastructure equipment forming part of a wireless communications network. The method comprises determining uplink communications resources of a wireless access interface provided by the wireless communications network to be used for the transmission of data by the communications device to the infrastructure equipment, receiving, from the infrastructure equipment via the wireless radio interface, an uplink pre-emption indicator that indicates that at least a portion of the uplink communications resources are allocated for the transmission of signals by another communications device, the at least the portion of the uplink communications resources being located within communications resources of a reference region associated with the uplink pre-emption indicator, and adjusting one or more communications parameters for the transmission of signals representing the data in the uplink communications resources in response to receiving the uplink pre-emption indicator.