Massive MIMO Radio Unit Integration for Cable-Less Beamforming
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Solution Overview
Problem
Existing Massive MIMO Radio Units (MRUs) are costly, high on power consumption, thermally inefficient, bulky, and require complex cabling, complicating design and construction, necessitating an integrated and cable-less solution.
Innovation Solution
A radio unit comprising a High Speed Transceiver Board (HSTB) operatively coupled to a Combined Central and Distributed Unit (CCDU) with RF transceivers, a RF Front End Module (RFEM) with RF power amplifiers, and an integrated MIMO antenna and cavity filter unit (AFU) for beamforming, configured in a single enclosure with a cable-less design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate/cabled components are used for antenna and transceiver elements, then interoperability and coupling are achieved, but device complexity and construction complexity increase
Solution Approach 1:
The patent combines the antenna array and transceiver elements into a single integrated Massive MIMO Radio Unit enclosure, eliminating the need for separate cabled components. The antenna array is positioned in the upper portion of the enclosure while transceiver elements are in the lower portion, with direct internal coupling rather than external cabling, thereby reducing construction complexity while maintaining interoperability.
2Ease of manufacture
If integrated antenna filter unit is used with cable-less design, then ease of manufacture and compactness improve, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements a nested structure where the antenna filter unit is integrated within the same enclosure as the antenna array and transceiver elements. The antenna filter unit contains both the antenna array and cavity filter in a nested arrangement, with the antenna array positioned in the upper portion and the cavity filter in the lower portion, allowing for compact integration while managing alignment precision through structured positioning.
3Productivity
If beamforming and spatial multiplexing are implemented, then data rate and capacity increase, but power consumption increases
Solution Approach 1:
The patent segments the radio unit into distinct functional modules: antenna array for signal reception/transmission, transceiver elements for signal processing, and cavity filter for frequency selection. This segmentation allows for optimized power management where each module can be independently controlled and powered down when not in use, reducing overall power consumption while maintaining high data rates through beamforming and spatial multiplexing capabilities.
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
The solution provides higher spectral efficiency, reduced energy consumption, improved data rate and capacity, reliable user tracking, and reduced latency while meeting RF performance standards, with a compact and efficient MRU design.
Implementation Method 1
an antenna filter unit (AFU) comprising an integrated MIMO antenna and a cavity filter to enable beamforming to a multi-user MIMO
Implementation Method 2
an antenna filter unit (AFU) comprising an integrated MIMO antenna and a cavity filter
Implementation Method 3
a RF Front End Module (RFEM) operatively coupled with the HSTB, said RFEM having one or more RF power amplifiers to receive the RF signals and amplify said RF signals
Implementation Method 4
a plurality of RF transceivers to receive digital signals from the CCDU and convert the received digital signals into RF signals across a plurality of RF chains
Data Source
AI summary
The present disclosure relates to an 5G Massive MIMO Radio Unit (MRU) that is connected to a Combined Central and Distributed Unit (CCDU) on front haul interface using 25G optical interface and is compliant to 3GPP (Third Generation Partnership Project) based ORAN (Open Radio Access Network) specifications. The proposed 5G MRU can include a lower PHY (Physical) portion of L1 layer with network layer split of 7.2×, a baseband section, a RF (Radio Frequency) Front End module (RFEM), and an Antenna Filter Unit (AFU) as part of a single enclosure/unit for easy and efficient installation.