Dual-Bandwidth Resource Allocation for LTE-Advanced UEs
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently supporting multiple users with different system bandwidths, particularly in LTE-Advanced systems, where legacy and new UEs require distinct bandwidth configurations, leading to complexities in resource allocation and interference management.
Innovation Solution
The system employs a dual-bandwidth approach, where legacy UEs operate on a primary bandwidth (R8BW) and new UEs on an additional bandwidth (NewBW), with overlapping or supplementary resources, allowing for flexible subframe designation and resource allocation to optimize HARQ operations and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single system bandwidth is used for all UEs, then device complexity is reduced, but adaptability to support both legacy and new UEs with different bandwidth requirements deteriorates
Solution Approach 1:
The patent segments the system bandwidth into a first bandwidth for legacy UEs and a second bandwidth for new UEs. This segmentation allows each UE type to operate on its designated bandwidth, enabling the system to support both legacy and new UEs simultaneously without requiring a single unified bandwidth configuration, thus resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The base station is designed with multi-functionality to handle both legacy and new UEs on different bandwidths. The base station can transmit control information for both UE types and manage resources across both bandwidths, providing universal support while maintaining distinct operational modes for each UE category, thereby achieving adaptability without excessive complexity.
2Adaptability or versatility
If separate bandwidths are allocated for legacy and new UEs, then adaptability is improved, but resource allocation complexity increases
Solution Approach 1:
The patent divides the available system resources into distinct first and second bandwidths, with the first bandwidth dedicated to legacy UEs and the second bandwidth dedicated to new UEs. This segmentation simplifies resource allocation by providing clear bandwidth boundaries, allowing the base station to manage each UE type's resources independently rather than navigating complex shared resource pools.
Solution Approach 2:
The patent introduces control information as an intermediary mechanism that the base station transmits to manage and coordinate resource allocation between the two bandwidths. This control information acts as a mediator that enables the base station to efficiently allocate resources to both legacy and new UEs while maintaining system coherence, thus reducing the operational complexity of managing multiple bandwidths.
3Productivity
If dual-bandwidth operation is implemented, then system capacity is enhanced, but interference between bandwidths may increase
Solution Approach 1:
The patent segments the frequency spectrum into a first bandwidth and a second bandwidth, with the second bandwidth positioned at a higher frequency than the first bandwidth. This frequency-based segmentation creates clear spectral boundaries that reduce interference between the two bandwidths while allowing both to operate simultaneously, thereby enhancing overall system capacity without significant inter-bandwidth interference.
Solution Approach 2:
The patent applies different quality characteristics to different parts of the spectrum by dedicating specific frequency ranges to specific UE types. The first bandwidth is optimized for legacy UE operations while the second bandwidth is optimized for new UE operations, allowing each segment to operate with its own quality parameters and reducing interference by matching transmission characteristics to local operational requirements.
Data Source
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Figure 3A~3B
AI summary
Techniques for supporting communication for different user equipments (UEs) on different system bandwidths are described. In one design, a base station transmits first control information to support communication for at least one first UE on a first system bandwidth and transmits second control information to support communication for at least one second UE on a second system bandwidth, which overlaps the first system bandwidth. The base station transmits data to the first and second UEs on the first and second system bandwidths, respectively. In one design, the base station receives third control information from the first UE(s) and fourth control information from the second UE(s) on a third system bandwidth. The base station receives data from the first UE(s) on the third system bandwidth and receives data from the second UE(s) on a fourth system bandwidth, which overlaps the third system bandwidth.