LTN (Low Throughput Network): Advantages and Disadvantages

This page explores the advantages and disadvantages of LTN (Low Throughput Network). It highlights the benefits and drawbacks of LTN. It also introduces the basic features of Low Throughput Networks (LTN).

What is LTN (Low Throughput Network)?

Introduction:

• LTN is a Wide Area Wireless Network technology with specific features compared to existing radio networks.
• It offers long-range (about 40 Km) communication at low throughput using minimal power.
• It’s ideal for M2M (Machine-to-Machine) traffic due to its low throughput (max. 50 kb/s) and lower latency (milliseconds to seconds). Typically, M2M devices send only a few bytes per day, week, or month.
• It’s also suitable for alarm, telemetry, control, sensing, and tracking applications.
• LTN networks can interoperate with cellular networks to address certain applications.

• LTN networks consist of LEPs (LTN End Points) and LAPs (LTN Access Points). These are supported and managed by Back End Systems. Moreover, they deliver end-user services via customer service platforms. Figure-1 (above) depicts LTN network architecture.
• It uses 868 to 915 MHz and 433 to 868/915 MHz (i.e., <1 GHz) frequency bands.
• A typical frame (i.e., payload) size used in LTN is about 12 bytes.

Benefits or Advantages of LTN (Low Throughput Network)

Following are the benefits or advantages of LTN (Low Throughput Network):

• It is a standalone network that provides open interfaces to create an ecosystem of end points, access points, networks, and service providers.
• LTN end points consume ultra-low power. Hence, a battery life of up to 20 years can be achieved with LTN devices.
• The network and its elements are optimized for low payload volume and low data rate applications.
• It offers a high budget link to provide improved coverage in urban and underground regions. It covers up to 10 to 12 Km (in the city) and 40 to 60 Km (across the countryside).
• It offers low costs of operations, maintenance, and ownership.
• It offers very low latency (from modem to availability of internet) usually in milliseconds to seconds.
• Transmitted data is encrypted to provide secure communications.

Drawbacks or Disadvantages of LTN (Low Throughput Network)

Following are the drawbacks or disadvantages of LTN (Low Throughput Network):

• It cannot be used for higher data rate applications carrying large amounts of payload volume.
• It is recommended to have a high sensitivity receiver with better than -135 dBm.