Board-dat/Board-DAT.md
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[[sensor-Camera-dat]]
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-- [[SCM1030-dat]] - [[SCM1002-dat]] - [[SCM1004-dat]] - [[SCM1008-dat]]
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+- [[SCM1030-dat]] - [[SCM1002-dat]] - [[SCM1004-dat]] - [[SCM1008-dat]] - [[SCM1017-dat]]
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### SCU
Board-dat/NGS/NGS1128-DAT/NGS1128-DAT.md
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# NGS1128-DAT
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+
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+- [[SIMCOM-AT-dat]] - [[SIM7080-dat]] - [[SIMCOM-dat]]
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+
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+- [[network-dat]] - [[LTE-dat]] - [[LWPA-dat]] - [[MQTT-dat]] - [[GNSS-dat]]
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+
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+
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+
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+
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## Hardware
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![](36-15-17-03-04-2023.png)
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- [[mqtt-dat]]
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- [[NGS1128]] - [[SIM7080-dat]]
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-- [[SIMCOM-AT]]
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+- [[SIMCOM-AT-dat]]
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- [[SIMCOM-AT-GNSS-dat]]
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- https://w.electrodragon.com/w/SIM7080
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Network-dat/LTE-dat/LTE-dat.md
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# LTE-dat
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+- [[LTE-dat]] - [[LWPA-dat]]
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+
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+
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## chip
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- [[A7670-dat]] - [[SIMCOM-dat]] - [[LTE-dat]] - [[M2M-dat]]
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- [[SIM7000-dat]]
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+## CAT
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+
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+In the context of LTE (Long-Term Evolution), **CAT** stands for **Category** (officially known as **UE Category** or User Equipment Category). It is a standard used to define the performance specifications and capabilities of a cellular device.
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+
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+Think of an LTE Category as a "performance tier." It tells the network what the device is capable of handling in terms of data speeds, frequency bands, and advanced signal processing.
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+
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+
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+### Key Parameters Defined by CAT
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+
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+When a device is assigned a specific Category, it must meet requirements for several technical factors:
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+* **Peak Data Rates:** The maximum theoretical download (downlink) and upload (uplink) speeds.
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+* **MIMO Layers:** How many simultaneous data streams the device can handle (e.g., 2x2 MIMO, 4x4 MIMO).
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+* **Modulation:** The complexity of the signal encoding (e.g., 16-QAM, 64-QAM, or 256-QAM). Higher modulation allows more data to be packed into the same frequency.
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+* **Carrier Aggregation (CA):** The ability to combine multiple frequency blocks to increase bandwidth.
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+
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+
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+### Comparison of Common LTE Categories
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+
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+
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+
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+| LTE Category | Max Download Speed | Max Upload Speed | Typical Use Case |
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+| :--- | :--- | :--- | :--- |
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+| **Cat 1** | 10 Mbps | 5 Mbps | Low-power IoT devices (smart meters, sensors). |
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+| **Cat 4** | 150 Mbps | 50 Mbps | Standard 4G smartphones and budget routers. |
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+| **Cat 6** | 300 Mbps | 50 Mbps | Early "LTE-Advanced" phones; introduces Carrier Aggregation. |
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+| **Cat 12** | 600 Mbps | 100 Mbps | High-end smartphones (LTE-A Pro). |
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+| **Cat 18** | 1.2 Gbps | 150 Mbps | Gigabit LTE devices using 4x4 MIMO and 256-QAM. |
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+| **Cat M1** | ~1 Mbps | ~1 Mbps | Machine-to-Machine (M2M) communication; highly power efficient. |
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+
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+---
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+
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+### Why Does It Matter?
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+
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+1. **Hardware Limitations:** A Cat 4 modem can never reach Cat 12 speeds, even if the cell tower supports them, because the hardware lacks the necessary antennas or processing power.
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+2. **Network Efficiency:** Higher category devices can download data faster, allowing them to "get off the air" more quickly, which frees up bandwidth for other users on the same tower.
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+3. **Battery Life:** For IoT applications (like Cat M1 or NB-IoT), the category is chosen to prioritize low power consumption over high speed, allowing devices to run for years on a single battery.
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## CAT vs. CAT M
Network-dat/LWPA-dat/LWPA-dat.md
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# LWPA-dat (Low Power Wide Area)
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+
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+- [[LTE-dat]] - [[LWPA-dat]]
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+
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+
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**LWPA** stands for **Low Power Wide Area** network, a category of wireless communication technologies designed for long-range connectivity with low power consumption. It is commonly used in the context of Internet of Things (IoT) networks, where devices need to send small amounts of data over long distances while consuming minimal energy.
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+
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+The relationship between [[LTE-dat]] and **LPWA** (Low Power Wide Area) is that [[LTE-dat]] provides the specific technical standards (**LTE-M** and **NB-IoT**) that allow cellular networks to function as LPWA networks.
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+
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+While standard [[LTE-dat]] is optimized for high-speed data for smartphones, LPWA-specific [[LTE-dat]] technologies are stripped-down versions designed for "machine-type communication" where battery life and coverage are more important than speed.
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+
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+
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- [[NBIOT-dat]] - [[LORA-dat]] - [[SIGFOX-dat]] - [[LTE-M-dat]]
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+- [[LTE-dat]]
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## Key Characteristics of LWPA (LPWAN):
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Network-dat/network-dat.md
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- [[PT2262-dat]] - [[PT2272-dat]] - [[RF-link-dat]] - [[network-dat]]
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-
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+- [[LTE-dat]] - [[LWPA-dat]]
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mechanics-dat/mechanical-structure-dat/shell-dat/shell-dat.md
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- [[shell-dat]] - [[mechnical-structure-dat]]
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+- [[plastic-dat]] - [[fab-sheet-metal-dat]]
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+
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plastic shell thickness == 2.0 mm
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sheet metal thickness == 1.0 mm