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title: SBIR WRB (08-13-2021)
tags: sbir-star
robots: noindex, nofollow
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<!-- 研究主題類別: 市場調查、通訊模組、無線技術 -->
MQTT與LwM2M比較 (08-13-2021)
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| | MQTT | LwM2M |
| ------------------------- | ----------------- | --------------------------- |
| **Device Management** | Not defined | Defined |
| **Transport Layer** | TCP | UDP, SMS, TCP, HTTP, MQTT |
| **Application Layer** | - | CoAP |
| **Payload Encoding** | Not defined | TLV, Opaque, CBOR |
| **Data Model** | Not defined | Defined |
| **Bandwidth Consumption** | Payload dependent | Low |
| **Security** | SSL/TLS(TCP) | TLS(TCP), DTLS(UDP), OSCORE |
| **Open / Standard** | Yes | Yes |

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＊**見證人**

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