Initial DL BWP and CORESET Configuration for Low-Complexity UEs
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Solution Overview
Problem
Existing wireless communication systems face limitations in flexibility and efficiency due to reduced antennas and bandwidth, particularly in devices requiring lower complexity, which affects the determination of initial downlink BWP and common CORESET configurations.
Innovation Solution
A method for determining initial downlink BWP and common CORESET configurations by receiving specific configurations from a base station, including a bitmap indicating frequency domain resources, and adjusting the starting position and bandwidth based on predefined size criteria to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the number of antennas and bandwidth are reduced to lower device complexity, then device complexity and cost are reduced, but system flexibility and efficiency are limited
Solution Approach 1:
The patent implements dynamic bandwidth part (BWP) configuration that allows the system to adaptively adjust resource allocation based on service requirements. The network can dynamically configure different initial DL BWP parameters including bandwidth size, subcarrier spacing, and cyclic prefix length, enabling the system to flexibly respond to different service scenarios even with reduced hardware capabilities.
Solution Approach 2:
The patent changes key physical layer parameters including subcarrier spacing (15kHz or 30kHz), cyclic prefix length (normal or extended), and bandwidth part size to optimize system performance. By providing multiple parameter configurations for initial DL BWP, the system achieves adaptability across different service types (eMBB, URLLC, mMTC) without requiring increased hardware complexity.
2Device complexity
If the number of antennas and bandwidth are reduced to lower device complexity, then device cost is reduced, but system efficiency is limited
Solution Approach 1:
The patent segments the total system bandwidth into multiple bandwidth parts (BWPs), where each BWP is optimized for specific service requirements. This segmentation allows efficient resource utilization by allocating appropriate bandwidth portions to different services (e.g., narrow BWP for mMTC, wide BWP for eMBB), thereby maintaining high system efficiency despite reduced overall device capabilities.
Solution Approach 2:
The patent applies local quality optimization by configuring different initial DL BWP parameters for different service scenarios. Each BWP configuration is locally optimized with specific subcarrier spacing, cyclic prefix length, and bandwidth size matched to the requirements of particular services, ensuring high efficiency for each service type while maintaining low overall device complexity.
3Ease of manufacture
If reduced bandwidth configuration is used for lower complexity devices, then device cost is reduced, but resource utilization efficiency is limited
Solution Approach 1:
The patent implements a universal initial DL BWP configuration mechanism that serves multiple service types through a single configurable framework. The same physical layer structure supports different services by varying parameters such as bandwidth size, subcarrier spacing, and cyclic prefix length, enabling one device design to efficiently handle diverse services (eMBB, URLLC, mMTC) without requiring service-specific hardware modifications.
Data Source
AI summary
A method by a user equipment (UE) is described. The method includes receiving, from a base station, MIB providing a first quantity of contiguous resource blocks (RBs) and a first frequency position of a first starting RB for a first CORESET; receiving system information including a second configuration of an initial downlink (DL) BWP, the second configuration providing a second quantity of contiguous RBs, a second frequency position of a second starting RB, and a bitmap indicating frequency domain resources for a second CORESET, each bit of the bitmap corresponds a group of 6 contiguous RBs, with grouping starting from a first RB group in ascending order of RB index; and determining whether the second quantity exceeds a predefined size, wherein in a case the second quantity exceeds the predefined size, determining the first frequency position and the first quantity as a starting position and a bandwidth for an initial DL BWP, and determining a first RB index of the first RB group by using the second frequency position, in a case the second quantity does not exceed the predefined size, determining the second frequency position and the second quantity as the starting position and the bandwidth, and determining the first RB index of the first RB group by using the second frequency position.