UE Receive Resource Allocation for Unused Downlink MIMO Layers
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Solution Overview
Problem
Wireless communications systems face inefficiencies in data throughput due to unused receive resources in user equipment (UE) when configured with fewer downlink MIMO layers than supported, leading to reduced data rates.
Innovation Solution
User equipment (UE) allocates unused receive resources to cells with downlink MIMO layers based on factors like bandwidth, gain, and reference signal measurements to optimize data throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE is configured with fewer downlink MIMO layers than the UE can support, then the device complexity is reduced, but the data throughput decreases due to unused receive resources
Solution Approach 1:
The patent dynamically changes the allocation of receive resources by adjusting the number of MIMO processing chains assigned to different cells based on configuration parameters. The UE can allocate more processing chains to cells with higher bandwidth or better channel conditions, optimizing data throughput while utilizing all available receive resources without increasing peak device complexity
Solution Approach 2:
The patent implements dynamic resource allocation where the UE can flexibly assign receive resources to different cells based on real-time conditions. The network can reconfigure the number of MIMO layers and antenna ports per cell, allowing the system to adapt to varying traffic demands and channel conditions, thereby improving overall productivity without permanent increases in device complexity
2Adaptability or versatility
If the UE allocates receive resources to multiple cells with downlink MIMO layers, then the adaptability of the system improves, but the device complexity increases
Solution Approach 1:
The patent segments the total number of receive resources into multiple MIMO processing chains that can be independently allocated to different cells. Each processing chain handles a specific cell's downlink MIMO layers, allowing the UE to distribute computational load across multiple specialized units rather than one monolithic processor, thereby managing device complexity while maintaining high adaptability
Solution Approach 2:
The patent creates a universal resource allocation framework where the same set of receive resources can serve multiple cells with different configurations. The UE's MIMO processing chains are designed to be multi-functional, capable of handling various cell configurations and traffic patterns, thus achieving high adaptability without proportionally increasing device complexity
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit, to a base station, a UE capability message associated with a number of downlink multiple-input and multiple-output (MIMO) layers supported at the UE. The UE may receive a configuration for a set of downlink MIMO layers including a first subset of downlink MIMO layers configured for a first cell and a second subset of downlink MIMO layers configured for a second cell. The UE may allocate a first set of resources to the first cell or the second cell, or both, based on the first and the second subset of downlink MIMO layers. The UE may determine a second set of resources are unallocated to the set of downlink MIMO layers and allocate the second set of resources to the first cell or the second cell, or both.