BS5514 5G Integrated Base Station

This document is used to describe the BS5514 5G Integrated Base Station, including BS5514 S3500 and BS5514 S4900. It can support 5G NR 3.5/4.9GHz and WIFI6 5.6GHz systems and bands at the same time. BS5514 adopts baseband and RF integrated design, with the characteristics of small volume, high integration, superior performance and stable operation, which can meet the functional requirements and harsh deployment scenarios of industry customers.

Features

● High integration

The volume of the BS5514 is less than 20L and the weight is less than 15kg, allowing easy transportation and installation.

The BS5514 can be mounted on the pole, and wall. It does not need extra equipment room and facilities for BBU, which is great helpful for a fast and flexible deployment.

● Simple facilities

The BS5514 integrates lightning protection unit; therefore, only one small box is shown on sites.

● Green design

The BS5514 adopts highly efficient power amplifier technology - DPD to increase the power amplification efficiency greatly and reduce equipment power consumption.

Radiation through heat sink (no fans), reduces power consumption greatly, no noise, which is suitable for indoor and outdoor installation.

● High power and large capacity

The BS5514 supports 4 antennas, 100MHz bandwidth @ 3.5/4.9GHz; and WIFI6 AP with 4 antennas, 80MHz bandwidth @ 5.6GHz.

The transmission power of BS5514 S3500 is 4*10W and the transmission power of BS5514 S4900 is 4*5W; while the EIRP of WIFI6 is 30dBm.

● All IP architecture

The BS5514 supports 10GE fiber connection for BS back-haul for WIFI6 and NR.

Functions

The BS5514 has functionalities as following:

● Supports 5G NR Stand Alone architecture and basic NG-RAN interfaces: NG-C/NG-U/Xn.

● Supports transmission bandwidth: 100MHz @FR1 TDD for Sub6G.

● Supports 10GE fiber connection for BS back-haul of WIFI6 and NR.

● Supports basic modulation schemes including:

- QPSK/16QAM/64QAM/256QAM in DL

- BPSK/QPSK/16QAM/64QAM in UL

● Supports GPS/BD synchronization.

● Supports WIFI6 traffic directly offload to access internet at BS side, in order to decrease latency and mitigate traffic load on transmission back-haul.

Structure Appearance

The structure appearance of the BS5514 is as shown below.

Figure 3-1 The Structure Appearance of the BS5514

Hardware Structure 

The hardware architecture of the BS5514 is shown as following:

Figure 3-2 Hardware Architecture of the BS5514

The BS5514 consists of NR Main Board (MB), power amplifier (PA) module, WIFI6 Main Board (MB), filter and duplexer module, and power supply module, etc.

● NR MB: Based on ARM +baseband SOC chipset low-power architecture, with built-in AD/DA chipset, implementing NR sub6G protocol stack, physical layer, transceiver, and other functions. The backhaul interface of the base station is directly terminated on the Main Board. At the same time, the Main Board directly output the RF small signal of NR and is connected to the external PA module. The NR MB is interconnected with the WIFI MB through the on-board high-speed Ethernet interface to support the exchange of WIFI data and NR data, as well as the OAM function of the whole base station, including the control of the WIFI MB.

● PA module: The customized 3.5/4.9GHz integrated four-channel power amplifier module based on GaN technology can implement the output power of single channel.

● WIFI6 MB: The WIFI6 Main Board based on Qualcomm IPQ 8072 series, can provide the functions of WIFI6 baseband, transceiver and on-board power amplifier of 4 channels in 5GHz band; The maximum output power of all channels is no less than 18dBm. It can be connected to external filter-duplexer through on-board RF connector. The WIFI6 Main Board is interconnected with the NR Main Board through the on-board high-speed Ethernet interface to support WIFI data forwarding.

● Filter-Duplexer: The customized filter-duplexer with eight input channels and four output channels, can implement signal filtering of NR 3.5/4.9GHz and WIFI6 5.6GHz and duplexed output of 3.5/4.9GHz high power and 5.6GHz low power. The output connector of the filter-duplexer is directly the external N-head of the whole structure connecting to the external four-port antenna, with built-in lightning protection.

● Power Supply Module: the customized power supply module with 100~220V 50~60Hz AC input is suitable for most areas, and outputs DC 12V, 48V, 5V and some other required DC input for internal mainboards and modules. The power of power supply module meets the power consumption requirements of the whole base station.

Software architecture

The software architecture of the BS5514 is shown in the following figure:

Figure 3-3 Software Architecture of the BS5514

● OS/BSP: The bottom layer of software architecture is the operating system and board-level support packages, which are used to support the operation of the whole application software and the provision of system services.

● Platform Software: After the platform layer encapsulates the operating system services, it provides the required service interfaces for all applications, unifies the resource management, and enhances the robustness. It also includes DPDK applications to support the high-performance data plane path.

● NR L1 (Physical Layer): The complete NR Physical Layer protocol stack is implemented and communicates with L2 through FAPI interface.

● NR L2: The complete NR L2 protocol stack, including scheduler and user plane interface, communicates with L1 through FAPI interface.

● NR L3: The complete NR L3 protocol stack includes RRC, RRM, and Ng/Xn interface management.

● OAM: Supports the local operation and maintenance function of the base station, including web-LMT function

● Debugging and Logging: The debugging and logging functions of Base station includes Log, Trace, etc.