MIMO Subarray Selection for Flexible Antenna Configuration
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Solution Overview
Problem
In 3GPP standards, the subarray for multilayer MIMO is uniquely decided, leading to undesirable subarrays being used, which can lower communication speed and quality for terminal apparatuses, as the number of antenna ports increases, offering limited flexibility in choosing optimal subarray combinations.
Innovation Solution
An apparatus that acquires and notifies subarray information to terminal apparatuses, allowing for the selection of desirable subarray combinations for multilayer MIMO, including an acquiring unit for subarray information and a control unit to report on subarray combinations, enabling the use of optimal array antenna systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the subarray for multilayer MIMO is uniquely decided according to 3GPP standards, then the system implementation is simplified and standardized, but the communication speed and quality are lowered because undesirable subarrays may be used for specific terminal apparatuses
Solution Approach 1:
The patent makes the subarray configuration dynamic by allowing the base station to notify terminal apparatuses of multiple subarray configurations and enabling terminals to report their desired subarray combinations. This dynamic adaptation resolves the contradiction by maintaining standardization while allowing optimization for specific terminal characteristics and channel conditions.
Solution Approach 2:
The patent changes the parameter of subarray configuration from a fixed unique decision to a selectable set of configurations. By notifying terminals of multiple subarray configurations and allowing terminal feedback on desired combinations, the system can adjust subarray parameters to match terminal capabilities and channel conditions, thereby improving communication speed and quality.
2Quantity of substance
If the number of antenna ports is increased to provide more antenna elements for beamforming, then the capacity and beamforming capability are improved, but the flexibility in choosing optimal subarray combinations is reduced due to unique subarray decision
Solution Approach 1:
The patent segments the large array of antenna elements into multiple subarrays, each with distinct configurations. By notifying terminals of multiple subarray configurations and allowing selection of desirable combinations, the system provides flexibility in subarray selection while utilizing the large number of antenna elements for enhanced beamforming capability and capacity.
3Device complexity
If a fixed subarray configuration is used for multilayer MIMO, then the system complexity is reduced, but the communication quality is lowered because the subarray may not be optimal for each terminal apparatus
Solution Approach 1:
The patent introduces feedback mechanisms where terminal apparatuses report their desired subarray combinations to the base station. This feedback enables the system to select optimal subarray configurations for each terminal based on terminal capabilities and channel conditions, thereby improving communication quality without significantly increasing system complexity.
Data Source
AI summary
An apparatus is disclosed that includes a processor configured to acquire subarray information indicating a plurality of subarrays usable for multilayer Multi-Input Multi-Output (MIMO), notify a terminal apparatus of information related to the subarray, wherein the terminal apparatus is a terminal apparatus that performs a report related to a combination of two or more subarrays included in the plurality of subarrays, and wherein the plurality of subarrays includes two or more subarrays that share one or more antenna ports.