Interlace Channel Multiplexing for NR-U Resource Utilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current NR-U operation designs restrict interlace assignment to a single user equipment (UE), leading to inefficiencies when the number of interlaces is insufficient for multiple UEs, resulting in increased system overheads and restrictive interlace design due to OCB requirements, especially with large subcarrier spacing.
Innovation Solution
Implementing channel multiplexing within interlaces, allowing each interlace to be divided into multiple sub-interlaces, which can be assigned to multiple UEs using frequency-division multiplexing (FDM), code-division multiplexing (CDM), or time-division multiplexing (TDM), enabling more flexible resource allocation and increased power levels for UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If interlace assignment is restricted to a single UE, then interlace design is simple and OCB requirements are met, but system overhead increases and resource utilization becomes inefficient when multiple UEs need transmission
Solution Approach 1:
The interlace is segmented into multiple sub-interlaces, allowing a single interlace to be divided into smaller units that can be independently assigned to different UEs. This segmentation enables multiple UEs to share interlace resources without increasing overall system complexity, as the base interlace structure remains intact while being subdivided into manageable portions.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by allowing interlaces to be assigned to multiple UEs simultaneously through multiplexing techniques. Instead of the traditional one-to-one interlace-UE mapping, the system enables one-to-many mapping by utilizing sub-interlace division and multiplexing, thereby increasing system capacity without proportionally increasing complexity.
2Power
If channel multiplexing is implemented within interlaces, then multiple UEs can share interlaces and transmit power increases, but interlace design becomes more complex
Solution Approach 1:
The interlace structure is segmented into sub-interlaces that can be independently multiplexed. This segmentation allows the system to maintain a relatively simple base interlace structure while enabling complex multiplexing operations at the sub-interlace level, thereby achieving higher transmit power without proportionally increasing overall structural complexity.
Solution Approach 2:
The patent employs a nested structure where sub-interlaces are nested within interlaces, and multiple sub-interlaces are multiplexed within the same interlace. This nesting approach allows the system to achieve high transmit power through multiple nested multiplexed layers while keeping the overall interlace structure organized and manageable.
3Adaptability or versatility
If large subcarrier spacing is used, then NR-U operation is enabled, but interlace design becomes restrictive due to OCB requirements
Solution Approach 1:
The interlace is segmented into sub-interlaces that can be flexibly assigned to different UEs. This segmentation provides adaptability for NR-U operation with large subcarrier spacing while maintaining design flexibility, as the sub-interlace units can be configured in various ways to meet OCB requirements and support multiple UEs simultaneously.
Solution Approach 2:
The patent introduces dynamic interlace assignment where sub-interlaces can be dynamically allocated to different UEs based on transmission needs. This dynamic approach enables NR-U operation with large subcarrier spacing while maintaining flexibility in interlace design, as the system can adaptively configure which sub-interlaces are assigned to which UEs based on current operational requirements.
Data Source
AI summary
Techniques and examples of channel multiplexing within interlace for New Radio (NR) unlicensed spectrum (NR-U) operation are described. An apparatus (e.g., user equipment (UE)) determines which sub-interlace of multiple sub-interlaces in each of a plurality of interlaces is assigned to the apparatus. The apparatus then performs an uplink (UL) transmission to a wireless network in an NR-U using the assigned sub-interlace in each of the plurality of interlaces. Each of the plurality of interlaces may be divided into respective multiple sub-interlaces with channel multiplexing.