Transmission Power Fallback for Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face interference challenges due to conflicting performance metrics between high-priority and low-priority traffic types, such as ultra-reliability low-latency communications (URLLC) and enhanced mobile broadband (eMBB), where grant-less access to semi-persistent resources can result in collisions, affecting the reliability and latency of high-priority traffic.
Innovation Solution
The system provides priority traffic with grant-less access to semi-persistent communication resources and configures the transmission power of low-priority traffic to ensure that the interference parameter, indicative of the interference imposed on high-priority traffic, satisfies an interference threshold, thereby mitigating collisions and ensuring reliable delivery of high-priority traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If semi-persistent resources are reserved for high-priority traffic with grant-less access, then latency and reliability of high-priority traffic are improved, but interference from low-priority traffic increases
Solution Approach 1:
The patent applies local quality by configuring different transmission power levels for different priority traffic types. Low-priority traffic transmitted on semi-persistent resources is assigned a reduced maximum transmission power specifically when it would interfere with high-priority traffic, while high-priority traffic maintains its full transmission power. This localized power adjustment resolves the contradiction by protecting high-priority traffic from interference without completely blocking low-priority traffic access.
Solution Approach 2:
The patent changes the transmission power parameter dynamically based on traffic priority and resource type. The base station configures a maximum transmission power for low-priority traffic that is lower than the standard power level when the traffic is scheduled on semi-persistent resources. This parameter change ensures that the interference parameter (received power of low-priority traffic at the receiver) remains below a threshold that would degrade high-priority traffic performance.
2Productivity
If low-priority traffic is allowed to use semi-persistent resources, then resource utilization is improved, but interference with high-priority traffic increases
Solution Approach 1:
The patent enables low-priority traffic to utilize semi-persistent resources with a locally adjusted transmission power configuration. Instead of completely preventing low-priority traffic from using these resources, the system assigns a reduced maximum transmission power specifically for this scenario, allowing resource utilization while controlling interference levels.
Solution Approach 2:
The patent converts the potential harm of low-priority traffic interference into a beneficial resource utilization opportunity. By configuring a reduced maximum transmission power for low-priority traffic on semi-persistent resources, the system allows these resources to be used more frequently (improving productivity) while the reduced power ensures interference remains acceptable. The interference that would have been harmful is transformed into a controlled, acceptable level that enables better overall resource efficiency.
3Object-affected harmful factors
If maximum transmission power is configured for low-priority traffic on semi-persistent resources, then interference is reduced, but transmission power flexibility decreases
Solution Approach 1:
The patent introduces dynamics into the transmission power configuration by making the maximum transmission power for low-priority traffic conditional rather than fixed. The configured maximum power is applied specifically when low-priority traffic is scheduled on semi-persistent resources, while other scenarios maintain normal power flexibility. This dynamic, context-dependent power configuration reduces interference where needed while preserving adaptability in other operating conditions.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described to provide priority traffic grant-less access to pre-defined communication resources that are semi-persistently scheduled. A set of semi-persistent communication resources may be reserved for use by priority traffic. If the semi-persistent resources are not used for priority traffic, the semi-persistent resources may be scheduled for use by other types of traffic. As priority traffic is identified, the priority traffic may be transmitted using the semi-persistent resource without having those communication resources granted by a scheduling entity. Such grant-less access to the semi-persistent resources may result in collisions between the scheduled traffic and the priority traffic. To mitigate interference between different traffic types, the scheduled traffic may be transmitted using a transmission power that ensures an interference parameter indicative of an amount of interference imposed by the scheduled traffic on the priority traffic satisfies an interference threshold.