Branching Tower Amplifier for Four-Port RRU Coverage Without Insertion Loss
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Solution Overview
Problem
In communications network transformation, especially during the transition from CDMA to LTE, the existing radio frequency modules are not compatible, leading to resource wastage and reduced coverage due to the need for separate deployment and the insertion loss caused by adding combiners to enable 2T4R RRU functionality in LTE networks.
Innovation Solution
A branching tower-mounted amplifier is introduced with filter and amplification modules that connect to unused ports of a four-port RRU, allowing all ports to function for both receiving and sending, thereby ensuring network coverage without additional insertion loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two combiners are added on the antenna unit side to enable 2T4R RRU functionality, then the LTE network can utilize four ports, but an insertion loss of at least 3 dB is introduced to both CDMA and LTE networks
Solution Approach 1:
A branching tower-mounted amplifier is introduced as an intermediary device between the antenna unit and the RRUs. The amplifier has a first port connected to the antenna unit, a second port connected to the first RRU, and a third port connected to the second RRU. This intermediary amplifier enables signal distribution to multiple RRUs without requiring combiners, thereby achieving full port functionality while avoiding insertion loss.
2Reliability
If separate RRU deployment is performed for CDMA and LTE networks, then network compatibility is maintained, but resource wastage occurs and coverage is reduced
Solution Approach 1:
The branching tower-mounted amplifier provides multi-functional signal distribution capability, allowing a single amplifier to serve both CDMA and LTE networks simultaneously. The amplifier can distribute signals to different RRU types (2T2R for CDMA, 2T4R for LTE) through its multiple ports, enabling one device to fulfill multiple network requirements and maximizing resource utilization while maintaining compatibility.
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 solution enables all ports of the RRU to operate effectively, enhancing network performance and coverage without increasing insertion loss, thus optimizing resource utilization during network transformation.
Implementation Method 1
a filter module connected to the amplification module in series, the filter module comprising a first transmit filter, a first receive front-end filter and a first receive back-end filter
Implementation Method 2
an amplification module, connected to the filter module in series, the amplification module comprising a first low noise amplifier and a second low noise amplifier
Data Source
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AI summary
Embodiments of the present invention relate to the communications field, and provide a branching tower-mounted amplifier and an antenna feed system, so that a branching tower-mounted amplifier is added on an antenna unit side, thereby implementing a function of a four-port RRU, ensuring network coverage, and improving network performance. The branching tower-mounted amplifier includes a first filter module, a second filter module, a first amplification module, a second amplification module, a control module, a first branching module, and a second branching module. The first filter module is connected to the first amplification module. The first amplification module is connected to the control module. The control module is connected to the second amplification module. The second amplification module is connected to the second filter module. The first branching module is connected to both the first filter module and the first amplification module, and the second branching module is connected to both the second filter module and the second amplification module. Both the first branching module and the second branching module are configured to transmit a signal.