1. Overview

The Amazon Sidewalk network connects Endpoints to Amazon Sidewalk Cloud servers. The Endpoints connect through Amazon Sidewalk Gateways. Gateways and Endpoints communicate using the Amazon Sidewalk protocol. The Amazon Sidewalk protocol can be carried across the following radios:

• Amazon Sidewalk SubG, referred to as SubG-FSK
• The LoRa ® radio, referred to as SubG-CSS
• Bluetooth ® Low Energy, referred to as BLE

Amazon Sidewalk supports synchronous and asynchronous connection modes. In synchronous mode, the Endpoint must synchronize with a single Gateway before communicating through that Gateway. In asynchronous mode, an Endpoint transmits messages, which can be received by multiple Gateways.

Amazon Sidewalk Endpoints must register with the Amazon Sidewalk network before they can begin communicating. Registration requires keys that are built into the Endpoint at the time of manufacture.

Amazon Sidewalk Endpoints and Gateways communicate using frames. Frames can carry commands to control the connection, or data to communicate with the Amazon Sidewalk Cloud server.

Endpoints that are not actively communicating with Gateways can enter a low power mode. Power Profiles are used to manage low power behavior.

1.1 Scope

This document defines the wireless protocol used by Endpoints in the Amazon Sidewalk network. This document covers the following:

• Protocol stack layers
• The SubG-FSK radio
• Interactions between Endpoints and other elements of the system (commands and procedures)
• Power Profiles
• Security
• Architecture
• Frame formats and detailed descriptions of frame fields

This document does not include the following:

• Detailed specification of Gateways and the Amazon Sidewalk Cloud
• Interactions between Gateways and the Amazon Sidewalk Cloud

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