MUST Constellation Mapping for Non-Aligned Resource Layers
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing resources for multi-user superposition transmissions (MUSTs) with non-aligned transmission layers, leading to suboptimal performance due to inefficient modulation and power distribution across unaligned resource sets.
Innovation Solution
The implementation of adaptive modulation orders for MUSTs, where a base station schedules transmissions with a base layer and an enhancement layer using combined and extended constellations, allowing for flexible mapping of symbols across resource sets with different modulation orders, optimizing power distribution and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adaptive modulation orders are implemented for MUSTs with non-aligned resources, then resource utilization efficiency and transmission reliability are improved, but system complexity and computational overhead increase
Solution Approach 1:
The patent implements dynamic modulation order adaptation where the base station selectively applies different modulation orders (first modulation order for overlapping resources, second modulation order for non-overlapping resources) based on the specific resource alignment characteristics of each transmission. This dynamic approach optimizes resource utilization while managing system complexity through conditional logic rather than fixed complex structures.
Solution Approach 2:
The system changes the modulation order parameter adaptively based on resource alignment conditions. When resources are non-aligned, a second modulation order is applied to non-overlapping resources, while a first modulation order is applied to overlapping resources. This parameter change strategy improves transmission efficiency without requiring complete system redesign.
2Speed
If different modulation orders are applied to overlapping and non-overlapping resources, then data transmission rate and reliability are improved, but signal processing complexity increases
Solution Approach 1:
The patent segments the resource set into overlapping resources and non-overlapping resources, applying different modulation orders to each segment. This segmentation allows the system to achieve high data transmission rates by optimizing each segment independently while keeping signal processing complexity manageable through modular processing approaches.
Solution Approach 2:
Different modulation qualities are applied locally to different resource segments. The first modulation order is applied locally to overlapping resources where interference management is critical, while the second modulation order is applied locally to non-overlapping resources where maximum data rate is the priority. This local quality approach improves overall transmission performance without uniformly increasing processing complexity across all resources.
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.