Products &amp; Solutions

Evolving along with the RAN system, Remote Radio Unit (RRU) technology with support for simultaneous operation of multiple air-interface protocols becomes an emerging end-product requirement. Comba's Open RAN RRU model can address all existing generations of cellular technology, are air-interface agnostic, and support deployment over a wide range of environmental conditions.

Comba's RRH offers high hardware reliability and future-proof Open RAN solution for operators and neutral hosts to reduce total cost of ownership (TCO) with 5Rs:

Reducing tower loading with light weight and lower wind load requirement comparing to single band RRUs
Reducing cabling complexity by 50%
Reducing site space and rental cost
Reducing energy consumption
Reducing site work and labor cost due to quick installation

How can Comba Open RAN solution do it?

Open interfaces to most of the COTS-based BBUs

Comba's RRU is compliant with the O-RAN 7-2x functional split that provides open interfaces to the baseband unit (BBU) and the operation and management (OAM) interface to simplify interoperability between suppliers. It can be easily and quickly interfaced with 3rd party basebands via the industry standard CPRI/ eCPRI interfaces.

Disaggregation: open Interface not only between BBU and RRU, but also the Layer within the BBU and RRU

Engineered with Multi-TRX radio technology, the RRU allows 4G/5G capacity upgrade to 2T4R, 4T4R or 8T8R for both indoor and outdoor solutions depending on specific band combinations. By increasing network efficiency, capacity and overall speeds, gigabit LTE can make new applications and services practical for consumers.

Lower cost. Higher performance.

Comba'sRRU is designed with advanced RF Power Amplifier (PA) protection technology and highly integrated transceiver for cellular base stations, reducing the size, power consumption and cost of the unit.

To minimize the impact from gain and phase ripple, an equalizer with a well-developed and applicable algorithm is equipped in the RRU. It is a digital adaptive filter working in the frequency domain to adjust frequency components, enhancing performance by diminishing cost and complexity of the analog part.

The eCPRI interface in the RRU is compatible with different software vendors, which can ensure the smooth running of multi-vendor interoperating Open RAN 5G network. It can be used for administration, maintenance and troubleshooting of the network. It also transports multiple layer and carries digital radio signal, allowing carriers moving from the baseband units to the radio for simpler deployments of massive MIMO and increased flexibility.

All these enable base station providers to reduce their R&D costs, accelerate time to market, and mitigate the overall technology risk inherent in the development of high power radios.

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