Back-to-back TRP Configuration for 3D Massive MIMO
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Solution Overview
Problem
The challenge in wireless communication systems is the practical infeasibility of increasing the number of antenna elements due to space correlation and deployment constraints, leading to limitations in sectorization and coverage in cellular networks.
Innovation Solution
A 3D massive multiple-input multiple-output (MMU) architecture is implemented using a back-to-back configuration of transmit-receive points (TRPs) in a bidirectional-cuboid-array (BCA) to enhance the number of transceiver units (TXRUs) without increasing the form factor size, allowing for flexible cell layouts and improved coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of antenna elements is increased to improve wireless communication performance, then the system capacity and data rate are improved, but the deployment becomes practically infeasible due to space correlation constraints requiring at least half-wavelength spacing between adjacent antennas
Solution Approach 1:
The patent transitions from traditional two-dimensional planar antenna arrays to three-dimensional volumetric antenna structures. By stacking multiple antenna elements in the vertical dimension with sub-wavelength spacing, the system achieves increased antenna density without requiring proportionally larger horizontal deployment areas, thus resolving the space correlation constraint while maintaining deployment feasibility
Solution Approach 2:
The patent employs nested configurations where multiple antenna elements are positioned within a compact three-dimensional volume, with inner antenna elements surrounded by outer elements. This nesting approach allows multiple antenna elements to coexist in a limited space while maintaining appropriate spacing relationships, enabling increased antenna count without compromising deployment feasibility
2Adaptability or versatility
If conventional sectorization with fixed 120-degree sectors is used, then each gNodeB can handle a defined geographic region, but the system lacks flexibility in adapting to diverse deployment scenarios and coverage requirements
Solution Approach 1:
The patent implements dynamic sectorization where the network can adaptively adjust sector boundaries and configurations based on real-time traffic patterns, user distribution, and deployment requirements. Instead of fixed 120-degree sectors, the system dynamically reconfigures antenna beam directions and sector assignments, enabling flexible adaptation to diverse scenarios while managing complexity through automated control mechanisms
Solution Approach 2:
The patent creates a universal TRP configuration that can serve multiple functions and deployment scenarios. The same three-dimensional antenna structure can be configured for different sectorization patterns (e.g., 3-sector, 6-sector, or customized layouts) and can adapt to various coverage requirements, making the system universally applicable across diverse deployment environments without requiring separate specialized configurations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively doubles the number of TXRUs, enhances coverage, and enables flexible sectorization, supporting diverse cell layouts and improved communication performance.
Implementation Method 1
antenna elements of the first TRP are positioned to radiate in an opposite direction from antenna elements of the second TRP
Data Source
AI summary
A method and device for flexible cell layout via back-to-back TRP configuration. The method comprises arranging a first TRP set including a first TRP and a second TRP in a back-to-back configuration in which antenna elements of the first TRP are positioned to radiate in an opposite direction from antenna elements of the second TRP; and providing a three-dimensional (3D) massive multiple-input multiple-output unit (MMU) architecture including the first TRP set.