Multi-Cell DCI Scheduling With RBG-Based Frequency Allocation
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Solution Overview
Problem
The fragmentation of frequency resources in 5G NR technology leads to increased demand for scheduling data of multiple cells, which is not efficiently addressed by existing downlink control information (DCI) mechanisms, resulting in high DCI overhead and reduced transmission efficiency.
Innovation Solution
A method and apparatus for determining resource allocation and multi-carrier scheduling that involves receiving DCI, determining resource block group (RBG) granularity, and using the FDRA field to allocate frequency domain resources based on the RBG granularity and resource allocation type, reducing DCI bit overhead while maintaining scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing DCI mechanisms are used to schedule multiple cells, then scheduling capability is improved, but DCI overhead increases
Solution Approach 1:
The patent segments the frequency domain resource allocation by introducing RBG (Resource Block Group) granularity, dividing the frequency resources into multiple groups that can be independently scheduled. This allows the DCI to efficiently represent resource allocations across multiple cells by operating at the RBG level rather than individual RB level, reducing the number of bits required while maintaining the ability to schedule multiple cells flexibly
Solution Approach 2:
The patent creates a universal DCI structure that can schedule multiple cells simultaneously through the frequency domain resource allocation mechanism. By designing the FDRA field to work with RBG granularity and supporting multiple resource allocation types, a single DCI message can serve multiple cells with different resource requirements, improving scheduling capability without proportionally increasing overhead
2Productivity
If frequency domain resources are allocated with fine granularity, then resource utilization efficiency is improved, but DCI bit overhead increases
Solution Approach 1:
The patent introduces dynamic resource allocation through multiple resource allocation types (Type 0, Type 1, and dynamic allocation) that can be selected based on the scheduling requirements. The RBG granularity and resource allocation type can be dynamically adjusted to match the actual resource utilization needs, allowing fine-grained allocation when necessary while using coarser allocation when sufficient, thereby optimizing the balance between resource utilization efficiency and DCI overhead
3Productivity
If DCI schedules data of multiple cells, then spectrum utilization is improved, but complexity of resource determination increases
Solution Approach 1:
The patent manages complexity by standardizing key parameters across multiple cells, including RBG granularity determination methods and resource allocation types. By establishing consistent parameter frameworks and clear determination rules for these parameters, the patent enables efficient multi-cell scheduling while keeping the resource determination process manageable through parameter normalization and standardized procedures
Data Source
AI summary
A resource determination method is executed by a terminal and includes: receiving downlink control information (DCI) sent by a base station; wherein the DCI is configured to schedule data transmission of a plurality of cells; determining a resource allocation type of a first cell, wherein the first cell is any one of the plurality of cells; determining a resource block group (RBG) size of the first cell; wherein the RBG size of the first cell is determined based on three candidate RBG sizes corresponding to a number of resource blocks (RBs) occupied by a bandwidth part (BWP) configured for the first cell; and determining a frequency domain resource for data transmission of the first cell based on the RBG size of the first cell, the resource allocation type of the first cell, and an indication value of a frequency domain resource allocation (FDRA) field in the DCI.