Dynamic Spectrum Sharing With Mixed Numerologies for 5G-6G Coexistence
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Solution Overview
Problem
Conventional dynamic spectrum sharing techniques do not fully support coexistence between fifth generation (5G) and sixth generation (6G) radio access technologies (RATs, leading to inefficiencies in resource utilization.
Innovation Solution
Implementing techniques such as cell-specific reference signal rate matching, synchronization signal block relocation, and demodulation reference signal relocation, along with utilizing different subcarrier spacings and mixed numerologies within a time slot to enhance dynamic spectrum sharing between 5G and 6G RATs, enabling more efficient utilization of communication resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional dynamic spectrum sharing techniques are used, then existing RAT coexistence is supported, but 5G and 6G RAT coexistence is not fully supported
Solution Approach 1:
The patent implements dynamic spectrum sharing by enabling the system to dynamically switch between different subcarrier spacings (15 kHz for 5G, 30 kHz for 6G) within the same time slot based on the active RAT. This dynamic adaptation allows seamless coexistence of 5G and 6G RATs on the same frequency resources, resolving the contradiction between supporting existing RATs and enabling new RAT coexistence while maintaining reliable resource utilization.
Solution Approach 2:
The patent changes the subcarrier spacing parameter dynamically within a time slot depending on which RAT is active. When 5G is active, 15 kHz subcarrier spacing is used; when 6G is active, 30 kHz subcarrier spacing is used. This parameter change enables full support for 5G-6G coexistence while maintaining compatibility with existing RAT requirements, thereby improving both adaptability and resource utilization efficiency.
2Productivity
If multiple subcarrier spacings are used within a time slot, then resource utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the time slot into different portions, each dedicated to a specific subcarrier spacing and corresponding RAT. By dividing the time slot into 5G-specific portions (using 15 kHz SCS) and 6G-specific portions (using 30 kHz SCS), the system achieves efficient resource utilization for each RAT while managing complexity through structured segmentation rather than simultaneous complex processing of multiple spacings.
Solution Approach 2:
The system dynamically switches between different subcarrier spacings within a time slot based on RAT requirements. This dynamic approach allows the system to use only the necessary processing complexity for the active RAT at any given moment, rather than maintaining constant high complexity for all possible RATs simultaneously, thus improving resource utilization while managing system complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a broadcast message via a cell associated with a network entity. The broadcast message may include an indication that the cell supports a first radio access technology (RAT) and a second RAT. In some examples, the first RAT may be associated with a first subcarrier spacing (SCS) and the second RAT may be associated with a second SCS. The UE may perform measurements of one or more reference signals associated with the first RAT based on the indication. In some examples, the one or more reference signals may be multiplexed with physical downlink shared channel (PDSCH) data. The UE may transmit a channel feedback report to the network entity based on performing measurements of the one or more reference signals, and may demodulate the PDSCH data using the first SCS and the second SCS.