Smart Radio for 3.5 GHz CBRS band is compliant to FCC Part 96 regulatory requirements. The RM-3625 CBRS Smart Radio provides all the building blocks to deploy high performance and cost effective private broadband networks. The dual role CBSD (Gateway) + EUD (transparent bridge) is available in use-case optimized form factors. The Smart Radio embeds Doodle Labs CBRS with Mesh Rider technology.
The figure shows the Point to Multi-Point Network architecture for the license free CBRS band. At power up, every CBSD (Citizens Broadband Radio Service Device) is required to contact the shared Spectrum Access System (SAS) over the Internet and receive the operating parameters like channel and the RF power limit. The SAS provides this authorization in accordance with other CBSDs operating in the area.The device category CBSD-A is defined for urban use cases and high powered CBSD-B for rural-outdoor settings will be introduced in the future.
The FCC has authorized over 10 companies to operate the SAS. Doodle Labs has worked closely with Federated Wireless to ensure the interoperability of it’s CBSD-A and pre-configure it to make this a turn-key operation. Once the CBSD receives the authorization from the SAS, it can then instruct the downstream EUD (End User Device) to begin the operation.
The RM-3625 CBRS Band Smart Radio is an innovative dual role device. It can be software configured for either the CBSD-A role or the EUD role to simplify the network planning. The RM-3625 is available in various form factors to meet various stringent project requirements. The table below provides quick overview of the technical specifications. Refer to the detailed datasheet for more details.
|MODEL CATEGORY||CBSD-A or EUD, Dual Roles|
|Ordering Codes||RM-3625-2J-XM (Embedded)|
|Evaluation Kit||EK-3625-SR (Antennas, Cables and I/O ports to facilitate quick bench testing)|
|Operating Modes|| Dual Role – Gateway/AP (CBSD-A) and Transparent Bridge (EUD)|
|Radio Configuration||2×2 MIMO|
|Frequency Range||3550-3700 MHz|
|RF Power||27 dBm (in CBSD-A role)|
23 dBm (in EUD role)
|Max Data Throughput (UDP)|| 50 Mbps|
|Max Operating Range (Indicative)|| 3 Km (6/3 dBi antennas, 10 dBm Fade margin)|
|Wireless Data Encryption||128/256-bit AES hardware data encryption|
|Command & Control channel||Ultra-Reliable Low Latency Channel (URLLC) for Command and Control data. Latency 30 ms (Typical)|
|Video Channel||Optimized HD video streaming channel|
|Mesh Automatic Transmit Power Control |
|Intelligently adjusts the transmit output power based on signal strength. Allows the Smart Radios to be utilized in a widely dispersed and dynamic mesh.|
|Operating Voltage||5.5~42V DC|
|I/O Interfaces||Embedded: 2x Ethernet, USB (Host) or UART, GPS|
External: 2x Ethernet, 2x USB (Host), UART, 2x GPIO, GPS
Pocketable: WiFi, Bluetooth, USB (Host), USB (Device), Ethernet, UART, GPIO, GPS
|Dimensions||Embedded: 65 x 57 x 12 mm, 70 grams|
External: 148 x 137 x 58 mm, 540 grams
Pocketable: 70 x 95 x 15 mm, 150 grams
|Temperature range (Operating)||-40°C to +85°C|
|Ingress Protection||Embedded: IP50 (dust protected, no liquids)|
External: IP67 (immersion up to 1 meter under water)
Pocketable: IP63 (Spray falling up to 60° from vertical)
|Special Features||– Extended lifespan with 3 years’ planned availability|
– Extreme Reliability, IPC Class 2 standard with Class 3 options
|FCC ID||2AG87RM-3625 (In Progress)|
* Specifications are subject to change without prior notice.
CBRS is a very large spectrum band being made available for licenses free use. The FCC calls CBRS an “innovation” band with the hope that it will spark the development of many new uses cases. Please read our CBRS License Free Private Networks for Industrial IoT Applications for more information.
After almost 5 years of planning, the commercial CBRS deployments have just begun in Q1 2020. The industry is excited to take advantage of the opportunities presented by such a large swath of unlicensed spectrum becoming available (For reference, CBRS is 150 MHz while 2.4 GHz WiFi is only 70 MHz wide band). There are many things to learn and many experiences to share. Here we have curated some resources that we think may be useful in your research.