咨询国际空间站设备所用IoT协议及设备软件更新适用协议

Hey Howard, great questions—let’s break these down clearly based on how the International Space Station handles these scenarios:

1. IoT Protocols for ISS Devices #

The ISS relies on specialized protocols tailored to the unique constraints of space communication (limited bandwidth, high latency, potential packet loss) rather than standard terrestrial IoT protocols like MQTT or HTTP. The core suite here is the CCSDS (Consultative Committee for Space Data Systems) family of protocols:

• CCSDS Space Link Protocols: These form the backbone for data transfer between the ISS and ground stations, handling framing, error correction, and link management.
• CCSDS File Delivery Protocol (CFDP): Used for reliable file and data payload transfer, which is critical for IoT-like sensor data transmission from ISS devices to ground control.
• Optimized TCP/IP: For some internal ISS network communications (between on-board computers and devices), a modified version of TCP/IP is used, tuned to handle the space environment’s quirks.

Standard terrestrial IoT protocols aren’t typically used here because they don’t account for the extreme communication challenges of space.

2. Protocol for ISS Device Software Updates via Function Apps #

When updating software on ISS devices, the go-to protocol is CFDP (CCSDS File Delivery Protocol). Here’s why:

• It’s designed specifically for reliable file transfer in space environments, supporting features like breakpoint resumption, error recovery, and prioritized data delivery—all essential when pushing large software packages over a limited, high-latency link.
• Your function app would interface with ground control systems that use CFDP to relay the software update payload to the ISS. The on-board systems then validate and apply the update using CFDP’s built-in integrity checks to ensure the software isn’t corrupted during transmission.

While ground-side components of your function app might use standard protocols (like HTTPS) to communicate with NASA’s ground infrastructure, the critical space-to-ground (and vice versa) transfer of the software update itself relies on CFDP.

内容的提问来源于stack exchange，提问作者Howard Edidin