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# System prepended metadata

title: SBIR WRB (08-13-2021)
tags: [sbir-star]

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title: SBIR WRB (08-13-2021)
tags: sbir-star
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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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