LTE Cat 1bis technology has emerged as a significant evolution of LTE Cat 1, designed specifically to optimise Internet of Things (IoT) and Machine-to-Machine (M2M) applications. While both technologies share fundamental characteristics, their key differences position them for different use cases.
Key Differences between LTE Cat 1bis and LTE Cat 1
1. Antenna Design:
o LTE Cat 1bis uses a single antenna, while LTE Cat 1 requires two antennas. This simplified design reduces hardware size, complexity and associated costs.
o However, the receive sensitivity in Cat 1bis decreases by 3 dB compared to Cat 1, which may affect performance in areas with limited coverage.
2. Data Transfer Rates:
o Cat 1 offers download speeds up to 10 Mbps and upload speeds up to 5 Mbps.
o Cat 1bis maintains similar speeds, but in some cases may be slightly lower due to the use of a single antenna.
3. Latency:
o Both technologies offer low latency (50-120 ms), suitable for IoT applications requiring fast response times.
4. Cost and Energy Efficiency:
o The elimination of an antenna in Cat 1bis allows for reduced costs and improved energy efficiency. This makes it ideal for small or battery-powered IoT devices.
5. Global Compatibility:
o Cat 1bis modules are being approved by multiple global operators, making it easy to deploy in diverse regions.
Technical Comparison
Feature
Antennas LTE Cat 1bis One LTE Cat 1 Two
Sensitivity (Rx) LTE Cat 1bis -141 dB LTE Cat 1 -144 dB
DL/UL Rate LTE Cat 1bis Up to 10 Mbps / 5 Mbps LTE Cat 1 Up to 10 Mbps / 5 Mbps
Latency LTE Cat 1bis ~100 ms LTE Cat 1 ~100 ms
Cost LTE Cat 1bis Lower LTE Cat 1 Higher
Applications LTE Cat 1bis Massive IoT LTE Cat 1 Moderate IoT
Common Applications
LTE Cat 1bis is designed for massive IoT applications that prioritise efficiency and cost, such as:
- Medidores inteligentes.
- Seguimiento de activos.
- Logística y transporte.
- Sensores en ciudades inteligentes.
On the other hand, LTE Cat 1 is more suitable for devices that need more coverage or capacity in weak signal areas.
CAVLI Solutions
CAVLI offers advanced modules for both technologies:
- Cat 1bis: Cavli C16QS and C17QS with QCX216 chipset, ideal for global regions.
- Cat 1: Cavli C10QM and CQ10 with MDM9207 chipset, supporting fallback to 2G networks.
In addition, the modules include features such as WiFi scanning for precise indoor location, complementing GPS capabilities.
LTE Cat 1bis represents a significant advance by simplifying hardware design without substantially compromising performance. Its lower cost and power efficiency make it an attractive option for mass IoT. On the other hand, LTE Cat 1 remains relevant for applications requiring greater coverage or ruggedness in harsh environments. The choice between the two will depend on the specific needs of the project.
