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low throughput network (LTN)

Low Throughput Network (LTN) is a low power WAN (LPWAN) specified by ETSI for the Internet of Things (IoT) and machine-to-machine communication

(M2M). LTN networks are characterized by low-cost implementation, where the connection of the objects and the modems cost only a few euros. Due to the low throughput, LTN networks only require a few milliwatts of transmitting power for data transmission. This means that normal batteries

used in theradio-based sensors and actuators

can be operated maintenance-free for many years.LTN networks transmit their data using Ultra Narrow Band (UNB); in Europe with a channel width of 100 Hz

inthe frequency range of868 MHz. The advantage of this method is that the LTN end points require very little energy for data transfer. In addition, a high sensitivity of -135 dBm is recommended in the specifications. Two-phase shift keying (BPSK) is used as the modulation

. Thedistance range that can be bridged by LTN networks is about 40 km in rural areas. The

MAC frame for the uplink comprises relatively few data fields, such as the preamble (4 bytes), the 2-byte frame synchronization, the end address (4 bytes), the payload with a maximum of 12 bytes, the variable data field for authentication and 2 bytes for the cyclic block check. The downlink frame is slightly longer.

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Englisch: low throughput network - LTN
Updated at: 10.11.2015
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Translations: DE