Cross-RAT Spectrum Sharing with RB-Level Scheduling and Puncturing
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Solution Overview
Problem
In wireless communication systems, scheduling wireless communications for 6G UEs on time-frequency resources shared with 5G NR RATs results in high control overhead due to the need to avoid prohibited resources, leading to inefficient use of spectrum.
Innovation Solution
Configuring wireless communications for 6G UEs on both unoccupied and prohibited time-frequency resources, allowing scheduling on an RB-by-RB or RBG-by-RBG basis while using rate matching and puncturing to exclude prohibited resources, reducing control overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless communications for 6G UEs are scheduled on time-frequency resources shared with 5G NR RATs, then spectrum sharing efficiency is improved, but control overhead increases due to the need to avoid prohibited resources
Solution Approach 1:
The time-frequency resources are segmented into resource blocks (RBs) or resource block groups (RBGs) rather than individual resource elements. This segmentation allows the system to schedule communications on RB/RBG level while avoiding prohibited resources, reducing the granularity of control signaling and thereby reducing control overhead while maintaining spectrum sharing efficiency
Solution Approach 2:
The patent changes the scheduling parameter from resource element level to resource block or resource block group level. By changing this parameter, the system can maintain flexibility in avoiding prohibited resources while significantly reducing the amount of control information needed, thus resolving the contradiction between spectrum sharing efficiency and control overhead
2Device complexity
If scheduling is performed on an RB-by-RB or RBG-by-RBG basis to reduce control overhead, then control overhead is reduced, but spectrum utilization may be inefficient when prohibited resources are scattered
Solution Approach 1:
The system schedules communications on RBs or RBGs that may contain both prohibited and unprohibited resources. Instead of completely avoiding RBs with prohibited resources, the system performs partial scheduling on the unprohibited portions of those RBs/RBGs, thereby utilizing spectrum more efficiently while maintaining manageable control overhead through RB/RBG-level scheduling
Solution Approach 2:
The patent applies different treatment to different parts of the same RB or RBG. Within an RB/RBG, some resource elements are prohibited while others are not. The system identifies and excludes only the prohibited local regions while allowing scheduling on the unprohibited regions, achieving both spectrum utilization efficiency and controlled overhead through this localized differentiation
Data Source
AI summary
During wireless communication on a radio access technology (RAT) over a frequency band, there may be time-frequency resources on the frequency band that are not occupied. In some embodiments, time-frequency resources that are not occupied by wireless transmissions on a first RAT may be used for wireless transmissions on a second RAT. For example, a first RAT may perform wireless communication on a first frequency band, and a second RAT may perform wireless communication on a second frequency band. The first and second frequency bands may at least partially overlap in the frequency domain so that a wireless communication on the second RAT on the second frequency band may use time-frequency resources that are not occupied by wireless transmissions on the first RAT on the first frequency band.