Beam-ID-Based MU-MIMO Grouping to Reduce Signal Interference
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Solution Overview
Problem
Traditional mobile networks group communication devices into MU-MIMO groups without considering beam identifiers, leading to interference or inefficient SU-MIMO configurations, and complex algorithms for determining MU-MIMO pairs are inaccurate and cumbersome.
Innovation Solution
The method involves obtaining beam identifiers for communication devices and forming MU-MIMO groups based on these identifiers, ensuring each device has a unique beam ID to reduce interference and simplify pairing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If blind pairing is used to group communication devices into MU-MIMO groups, then device grouping can be established quickly, but interference occurs when devices share the same beam identifier
Solution Approach 1:
The patent applies preliminary action by obtaining and comparing beam identifiers of communication devices before forming MU-MIMO groups. The base station retrieves beam ID information from device reports, performs compatibility checks, and only then proceeds with group formation. This preliminary verification prevents interference issues from arising in the first place, rather than dealing with them after group formation.
Solution Approach 2:
The patent implements feedback by using beam identifier information reported by communication devices to inform the MU-MIMO grouping decision. The base station receives beam ID reports from devices, uses this feedback to assess compatibility, and adjusts grouping accordingly. This feedback mechanism ensures that grouping decisions are based on actual device characteristics rather than arbitrary assignment.
2Measurement precision
If complex algorithms are used to calculate spectrum efficiency for MU-MIMO pairing, then pairing accuracy may improve, but the calculation becomes cumbersome and inaccurate due to TTI and RBG level complexity
Solution Approach 1:
The patent applies the taking out principle by extracting the beam identifier as a key characteristic from complex TTI and RBG level calculations. Instead of performing exhaustive spectrum efficiency calculations across multiple time and frequency dimensions, the invention isolates and uses beam ID comparison as the primary pairing criterion. This extraction simplifies the problem while maintaining essential pairing accuracy.
Solution Approach 2:
The patent applies parameter changes by shifting from complex multi-dimensional parameters (spectrum efficiency across TTI and RBG) to a simpler parameter (beam identifier). This parameter transformation maintains the essential information needed for pairing decisions while dramatically reducing computational complexity. The beam ID serves as a sufficient statistic for compatibility assessment in many scenarios.
Data Source
AI summary
Aspects of the subject disclosure may include, for example, obtaining a first beam identifier associated with a first communication device, obtaining a second beam identifier associated with a second communication device, and generating a multi-user (MU) multiple-input-multiple-output (MIMO) group including the first communication device and the second communication device based on the first beam identifier and the second beam identifier. Other embodiments are disclosed.