Adaptive MUST Modulation for Non-Aligned Resource Mapping
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing adaptive modulation orders for multi-user superposition transmissions (MUSTs) with non-aligned resources, leading to suboptimal resource allocation and transmission efficiency.
Innovation Solution
The implementation of adaptive modulation orders for MUSTs involves scheduling a base layer and an enhancement layer with non-aligned resource sets, using a combined constellation for aligned resources and an extended constellation for unaligned resources, allowing for efficient data transmission across multiple UEs by adjusting modulation orders based on relative geometries and power ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adaptive modulation orders are used for MUSTs with non-aligned resources, then transmission efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments the resource allocation process into distinct phases: determining base layer and enhancement layer resource sets, identifying aligned versus unaligned resources, and applying different constellation mapping strategies to each segment. This segmentation manages complexity by breaking down the overall resource allocation task into manageable, standardized sub-tasks.
Solution Approach 2:
The patent dynamically adjusts modulation order parameters based on the alignment status of resources. When resources are aligned, a first modulation order is applied; when unaligned, a second modulation order is used. This parameter adaptation enables efficient transmission across diverse resource configurations without requiring a completely different allocation framework for each case.
2Reliability
If combined constellation is used for aligned resources and extended constellation for unaligned resources, then transmission reliability is improved, but system complexity increases
Solution Approach 1:
The patent applies different constellation mapping qualities to different resource portions: combined constellation for aligned resources and extended constellation for unaligned resources. This local differentiation ensures optimal transmission reliability for each resource type while avoiding the overhead of applying the more complex extended constellation universally.
Solution Approach 2:
The system dynamically selects between combined and extended constellations based on the real-time alignment status of base layer and enhancement layer resources. This dynamic adaptation allows the system to maintain high reliability across varying transmission conditions without requiring manual configuration or fixed complex structures.
3Productivity
If multiple modulation orders are adapted based on relative geometries and power ratios, then resource utilization is optimized, but computational complexity increases
Solution Approach 1:
The patent performs preliminary determination of base layer and enhancement layer resource sets before actual data transmission. By pre-establishing the resource allocation framework and identifying alignment status in advance, the system reduces computational complexity during the actual transmission phase, as the modulation order selection becomes a straightforward lookup rather than a complex optimization problem.
Data Source
AI summary
Multi-user superposition transmissions (MUSTs) on non-aligned resources are described. A base station may schedule a transmission to an enhancement layer user equipment (UE) and a base layer UE. The transmission may include a base layer that spans a base layer resource set and an enhancement layer that spans an enhancement layer resource set, where the resource sets may be aligned or un-aligned. The base station may use a combined constellation to map symbols to the base layer resource set for communication with the enhancement layer and base layer UEs over overlapping portions of the resource sets, and an extended constellation to map symbols to an extended set of resources for which the enhancement layer resource set is exclusive of the base layer resource set. The extended constellation may be based on an extended modulation order determined based on a base modulation order and an enhancement modulation order.