Preemption Indication Periodicity Integer Constraint
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently scheduling and prioritizing data transmission across multiple services with different quality of service (QoS) requirements, particularly in 5G NR networks, where services like URLLC require low latency and high reliability, leading to complexities in frequency and time resource allocation.
Innovation Solution
The introduction of preemption indication (PI) mechanisms, where a base station indicates to UEs that delay-tolerant services should drop or ignore partial transmissions to prioritize delay-sensitive services, using group common DCI with DCI format 2_1 to manage resource allocation efficiently, ensuring integer periodicity for PI monitoring and configuring UEs to handle multiple PIs with restricted periodicities based on subcarrier spacings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If preemption indication mechanisms are introduced to prioritize delay-sensitive services, then radio resource utilization and service prioritization improve, but system complexity and configuration management difficulty increase
Solution Approach 1:
The patent changes the periodicity parameter of PI monitoring to be an integer number of symbols of the second serving cell, transforming a potentially complex non-integer timing relationship into a simple integer relationship. This parameter change simplifies the configuration and management of preemption indication mechanisms while maintaining their ability to prioritize delay-sensitive services effectively
2Adaptability or versatility
If flexible periodicity configurations are allowed for PI monitoring, then adaptability to different service requirements improves, but decoding performance and scheduling reliability deteriorate due to non-integer symbol durations
Solution Approach 1:
The patent applies local quality by making the periodicity configuration cell-specific and service-specific. Different integer periodicities can be configured for different serving cells and different QoS requirements, allowing the system to optimize for each local context while maintaining overall reliability through the integer-based approach that avoids non-integer symbol duration issues
3Adaptability or versatility
If multiple serving cells with different subcarrier spacings are configured, then support for diverse QoS requirements improves, but resource allocation complexity and scheduling difficulty increase
Solution Approach 1:
The patent segments the resource allocation by associating different serving cells with different subcarrier spacings and configuring cell-specific integer periodicities for PI monitoring. This segmentation allows each cell to be optimized independently for its specific QoS requirements while the overall system manages complexity through the standardized integer-based periodicity framework that simplifies cross-cell scheduling
Data Source
AI summary
A method and apparatus are disclosed from the perspective of a UE (User Equipment) and/or a base station. In one embodiment, the method includes the base station configuring the UE with a first serving cell and a second serving cell. The method also includes the base station configuring the UE with a periodicity for monitoring a downlink control signal in the first serving cell, wherein the base station is not allowed to configure the UE such that the periodicity includes a non-integer number of symbol(s) of the second serving cell, and wherein the downlink control signal includes a pre-emption indication (PI) for the second serving cell.