What is LTN?
This page compares LTN (Low Throughput Network) vs GSM vs PMR vs Zigbee vs Wireless M Bus and mentions difference between LTN,GSM,PMR,Zigbee and Wireless M Bus.
The full form of LTN is Low Throughput Network. It is a kind of wide area network(WAN) with characteristics different than existing RANs(Radio Access Networks) such as GSM, PMR(Private land Mobile Radio) etc. It supports coverage distance of about 40Km outside. It is suitable for M2M(Machine to Machine Communication) due to low throughput and low latency requirement.
Moreover LTN is ideal for M2M devices which requires few bytes of data transfer per day/week/month.
As shown in the figure, LTN network is composed of LTN end devices (LTN-ED) and LTN access points(LTN-AP). LTN network can interoperate with cellular networks such as GSM with backbone connectivity. A single LTN end device can be interfaced with more than one LTN APs as shown in the figure.
Following LTN interfaces are used between various LTN system entities:
A interface: Between LTN End Point and LTN Access Point
B interface: Between LTN AP and Back End system
C interface: Between Back End System and Customer Service Platform
Difference between LTN GSM PMR Zigbee Wireless M Bus
Following table compares LTN(Low Throughput Network) with existing cellular and personal area network technologies and mentions difference between them. It mentions comparison of LTN with GSM, PMR(Private land Mobile Radio), Zigbee(IEEE 802.15.4) and Wireless M-Bus. Security Authentication and cyphering is supported in all the mentioned wireless technologies.
| Features | LTN (Low Throughput Network) |
GSM | PMR | Zigbee | Wireless M Bus |
|---|---|---|---|---|---|
| Application | LTN is used in telemetry control, alarm, sensing/tracking |
GSM used for mobile SMS and data applications, used for telemetry and tracking as well as control applications |
Data over voice channel and is used by police |
Home automation, process automation, metering |
Smart meters |
| Typical bytes per day usage | less than 200 bytes/day | 1 SMS/day of size 140Bytes, less than 15 kBs/day (GPRS) |
50 bytes (1-2 Mob) | About 150 KBytes/day | less than 200 bytes/day |
| Data rate (payload) | less than 10 to 100 bytes/sec, 50 Kb/sec (max peak possible) |
35 Kbps(GPRS) | 500 bps to 4 Kbps | 250 Kbps in 2.4GHz PHY, 20Kbps in 868MHz PHY |
about 2.4 to 4.8 Kbps, 19.2 Kbps(Max) |
| Latency(Max) | msec to sec | sec(SMS), 640ms(ping) |
few ms as per data rate |
250 sec for 2.4GHz, 786 msec for 868MHz |
msec to sec |
| Coverage distance | upto 10 to 12Km in city up to 40 to 60 km in country side |
3Km in the city | upto 10 to 12Km in city |
10 meters | upto 1 Km in city |
| Frequency Band | 868 to 915MHz, 433,868,915MHz |
900KHz, 1800MHz |
VHF,UHF | 2.4GHz, 868MHz, 915MHz |
169MHz |
| RF Budget link | upto 170dB | 145dB | upto 170dB | 115dB | upto 150dB |
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