MU-MIMO Resource Allocation Algorithm for Throughput Optimization
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Solution Overview
Problem
Existing wireless networks face challenges in efficiently allocating radio resources for multi-user multiple-input multiple-output (MU-MIMO) transmissions, particularly in scheduling pairable users, calculating scheduling weights, and optimizing resource allocation to meet diverse quality of service (QoS) requirements.
Innovation Solution
A resource allocation algorithm that accounts for both user equipment (UE) priority order and UE pairability to facilitate MU-MIMO transmission by allocating time-frequency-spatial resources, optimizing spectrum efficiency, and improving overall cell throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single-user resource scheduling is used based on user priority order, then implementation simplicity is maintained, but spectrum efficiency and network throughput are limited
Solution Approach 1:
The patent segments users into different priority groups (first priority users and second priority users) and applies different scheduling rules to each group. This segmentation allows the system to maintain simple priority-based scheduling for most users while applying complex MU-MIMO resource sharing only to paired users, thus improving throughput without overwhelming complexity
Solution Approach 2:
The patent introduces a new dimension of spatial resource sharing by allocating resources not only in time-frequency domain but also in spatial domain through MU-MIMO. Users are allocated resources in different spatial layers, enabling multiple users to share the same time-frequency resources simultaneously, thereby improving spectrum efficiency and network throughput
2Productivity
If time-frequency resources are shared among multiple UEs for MU-MIMO, then spectrum efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies different resource allocation strategies to different user groups based on their local characteristics. First priority users receive dedicated resources with simple allocation, while second priority users are paired and share resources through MU-MIMO. This localized differentiation optimizes spectrum efficiency for paired users without complicating the allocation process for all users
Solution Approach 2:
The patent changes the resource allocation parameters dynamically based on user priority and pairing status. By adjusting whether users share spatial resources or have dedicated resources, the system optimizes spectrum efficiency while managing complexity through parameter variation rather than structural complexity
3Speed
If frequency selective scheduling is used to allocate best frequency resources, then data rate is optimized, but frequency resource fragmentation increases
Solution Approach 1:
The patent dynamically adjusts frequency resource allocation based on channel conditions and user priority. Frequency selective scheduling is applied adaptively to allocate the best frequency resources to users when needed, while allowing more distributed allocation at other times. This dynamic approach optimizes data rate while preventing excessive resource fragmentation through flexible reallocation
Data Source
AI summary
According to certain embodiments, a method for use in a network node for scheduling wireless transmissions using a plurality of multi-user multiple-input multiple-output (MU-MIMO) transmission layers comprises determining a first wireless device is spatially pairable with a second wireless device and that a scheduling priority of the first device is higher than the second device. The method further comprises allocating frequency domain resources of a first transmission layer for the first device according to its scheduling priority and allocating frequency domain resources in a second transmission layer for the second device according to the priority of the first device. The amount of frequency domain resources allocated in the second transmission layer is no larger than that allocated in the first transmission layer. The method further comprises transmitting the data to first wireless device on first transmission layer and to second wireless device on the second transmission layer.