CORESET Bandwidth Configuration for Mixed UE Types
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Solution Overview
Problem
Current wireless communication systems face challenges in configuring control channels to accommodate User Equipment (UE) with different bandwidth capabilities, leading to increased complexity and power consumption, particularly for lower-tier UEs that require reduced hardware costs and lower power consumption.
Innovation Solution
The solution involves configuring an initial Control Resource Set (CORESET) with a reduced bandwidth tailored to the specific bandwidth capability of each UE type, allowing for multiple UE types to monitor and decode control channels efficiently, thereby reducing design complexity and power usage. This is achieved by setting up separate or nested CORESET configurations that are compatible with lower-tier UEs, using a combination of frequency and time resource configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single CORESET configuration is used for all UE types, then system simplicity is maintained, but lower-tier UEs experience increased complexity and power consumption
Solution Approach 1:
The patent segments the control resource set into multiple CORESET configurations, each tailored to specific bandwidth capabilities. Instead of using a single unified CORESET for all UEs, the system divides the control resources into separate configurations that match different UE types (e.g., narrowband CORESET for lower-tier UEs, wideband CORESET for premium UEs), thereby reducing complexity for each device category while maintaining overall system versatility
Solution Approach 2:
The patent implements dynamic CORESET configuration where the base station selectively applies different CORESET settings based on UE bandwidth capability. The system dynamically chooses between narrowband and wideband CORESET configurations, adjusting the control channel parameters (such as frequency range, resource blocks, and monitoring occasions) to match the specific UE type, thus optimizing both complexity and adaptability
2Use of energy by moving object
If control channel bandwidth is reduced for lower-tier UEs, then power consumption decreases, but system resource utilization efficiency is impacted
Solution Approach 1:
The patent applies local quality by configuring different bandwidth characteristics in different parts of the control resource space. Lower-tier UEs receive narrowband CORESET configurations that concentrate control resources in a smaller frequency range, reducing their power consumption. Meanwhile, premium UEs continue to access wideband CORESET configurations that utilize broader frequency resources, maintaining high system resource utilization overall
Solution Approach 2:
The patent implements a nested CORESET structure where narrowband CORESET configurations are embedded within the broader wideband CORESET framework. The narrowband CORESET for lower-tier UEs is nested within the frequency and time resources of the wideband CORESET, allowing efficient resource sharing and nested monitoring structures that optimize both power consumption and resource utilization
3Adaptability or versatility
If multiple CORESET configurations are maintained for different UE types, then bandwidth capability adaptability improves, but configuration complexity increases
Solution Approach 1:
The patent creates a universal CORESET configuration framework that serves multiple UE types through a single unified structure. The base station maintains one CORESET configuration that can adaptively serve both narrowband and wideband UEs by dynamically adjusting parameters such as frequency range, resource block allocation, and monitoring occasions based on UE capability indications, thereby achieving multi-functionality without maintaining separate rigid configurations
Data Source
AI summary
Control channel decoding can consume a significant amount of power with respect to the device's total power battery lifetime, as well as being a factor in the complexity of device. Aspects of a method, apparatus, and computer-readable medium are presented herein that provide a solution to the problem of control channel decoding complexity and power requirements by improving the manner in which control channels are decoded. An apparatus configures an initial CORESET having a reduced bandwidth corresponding to a bandwidth capability of a first UE type. The reduced bandwidth having a narrower frequency range than a bandwidth capability of a second UE type. The apparatus may configure a first CORESET for a first UE having a first bandwidth capability and a second CORESET for a second UE having a second bandwidth capability. The apparatus transmits control channel(s) in the configured CORESET(s).