How Huawei uses panel beam splitters

Huawei employs panel beam splitters in its Passive Ethernet Network (PEN) solutions to split and multiplex optical signals, enabling efficient, power-free distribution of data across campus networks.

Function in Huawei PEN Solutions

In Huawei's Xingmai Passive Ethernet Network (PEN), panel beam splitters are implemented through passive aggregation modules. These modules act as optical splitters and multiplexers, handling the distribution of light signals without requiring electrical power or ELV rooms, which reduces fire risk and simplifies installation .

• Downlink direction: The module splits the uplink light proportionally, allowing multiple remote devices to receive the same optical signals. Each TX port carries all eight channels from the central optical module.
• Uplink direction: Signals from remote devices are multiplexed into a single uplink channel, consolidating multiple optical channels for transmission back to the central switch.
• Configuration: Huawei supports 2:8 passive optical splitting, meaning two input channels can be split into eight outputs, with uplink backup for redundancy . These modules can be installed in subracks, with each subrack accommodating multiple passive aggregation modules, enabling scalable deployment across large campus networks.

Optical Principles

Huawei's panel beam splitters operate on the same principles as standard optical beam splitters. A beam splitter divides an incident light beam into transmitted and reflected components, either by using partially reflective coatings, prisms, or dichroic materials . In PEN systems, the splitters are designed to handle multiple wavelengths simultaneously, allowing wavelength-division multiplexing (WDM) for efficient data transmission.

Integration with 5G and Beamforming

While primarily used in optical networks, beam splitters conceptually relate to beamforming in 5G networks, where multiple antenna elements direct radio signals in specific directions . In Huawei's 5G infrastructure, optical splitters can support the distribution of signals to multiple remote radio units (RRUs), complementing digital or hybrid beamforming by ensuring that optical signals reach the correct transceivers efficiently.

Advantages

• Passive operation: No power required, reducing operational costs and fire hazards.
• Scalability: Supports multiple channels and flexible installation in subracks.
• Signal efficiency: Maintains optical signal integrity while splitting or combining channels.
• Integration: Works seamlessly with Huawei's PEN switches, remote devices, and Wi-Fi access points. In summary, Huawei uses panel beam splitters in its PEN solutions to passively split and multiplex optical signals, enabling high-speed, reliable, and scalable campus network deployments while minimizing power requirements and installation complexity .