NOMA Bandwidth Part Configuration for Spectral Efficiency
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently managing bandwidth and multiple access methods, leading to increased demand for improved spectral efficiency and reduced latency, especially as mobile broadband access continues to grow.
Innovation Solution
The implementation of non-orthogonal multiple access (NOMA) bandwidth part configuration techniques, which allow for flexible configuration of bandwidth parts for different use cases, enabling power savings, reduced latency, enhanced system capacity, and the multiplexing of various operation modes, including NOMA and OMA operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional orthogonal multiple access (OMA) is used, then system simplicity is maintained, but spectral efficiency and system capacity are limited
Solution Approach 1:
The patent segments the bandwidth into multiple bandwidth parts (BWPs), each configured for specific NOMA operations. This allows different UEs to be assigned to different BWPs with distinct NOMA configurations, enabling flexible spectral efficiency optimization without requiring complete system redesign. The segmentation principle resolves the contradiction by providing modular NOMA deployment options that improve capacity while maintaining manageable complexity through standardized BWP structures.
Solution Approach 2:
The patent introduces dynamic BWP switching mechanisms where UEs can be dynamically assigned to different bandwidth parts based on real-time channel conditions and traffic requirements. The gNodeB can dynamically configure NOMA parameters for different BWPs, enabling adaptive spectral efficiency optimization. This dynamic approach resolves the contradiction by allowing the system to optimize performance when needed while maintaining simplicity through automated, algorithm-driven configuration rather than manual complexity.
2Productivity
If NOMA operations are configured for all use cases, then system capacity is enhanced, but configuration complexity and overhead increase
Solution Approach 1:
The patent applies local quality by configuring NOMA parameters specifically for each bandwidth part rather than applying a universal NOMA configuration across the entire system. Each BWP can have tailored NOMA settings (such as power control parameters, resource allocation strategies) optimized for local channel conditions and UE requirements. This resolves the contradiction by enabling high system capacity through customized NOMA configurations only where needed, while avoiding unnecessary complexity in BWPs that do not require NOMA operations.
Solution Approach 2:
The patent designs the BWP framework to be universally applicable, where the same BWP structure and configuration mechanisms can support both NOMA and OMA operations, as well as future access methods. The standardized BWP interface and gNodeB configuration procedures provide multi-functionality, allowing the system to accommodate diverse access methods without requiring separate complex configuration systems. This universality resolves the contradiction by achieving enhanced system capacity through NOMA while maintaining manageable complexity through a unified, multi-purpose configuration framework.
3Ease of operation
If multiple NOMA bandwidth parts are configured, then link adaptation is simplified, but bandwidth resource allocation complexity increases
Solution Approach 1:
The patent introduces the bandwidth part as an intermediary structure between the overall system bandwidth and individual UE allocations. The BWP framework acts as a mediator that the gNodeB uses to manage resource allocation, where BWPs are pre-configured with specific resource blocks and NOMA parameters. This intermediary structure simplifies link adaptation by providing standardized allocation units that can be quickly assigned and reconfigured, while the complexity of detailed resource allocation is absorbed within the BWP configuration layer rather than at the system level. This resolves the contradiction by making link adaptation easier through standardized intermediaries while managing allocation complexity within the BWP framework.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive a group-specific radio network temporary identifier (RNTI) associated with non-orthogonal multiple access (NOMA); receive an indication of whether the group-specific RNTI is associated with contention-based NOMA or contention-free NOMA; and selectively use a group-specific multiple access (MA) signature or a UE-specific MA signature for a NOMA transmission based at least in part on the indication. Numerous other aspects are provided.