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Symphony Link vs LoRaWAN-Difference between Symphony Link and LoRaWAN

This page compares Symphony Link vs LoRaWAN and mentions difference between Symphony Link and LoRaWAN. Both are used as low power wide area networks.


Specifications Symphony Link LoRaWAN
What is it? Symphony Link is wireless system developed by Link Labs to overcome limitations of LoRaWAN system. It is built on LoRa CSS physical layer technology. LoRaWAN is communication protocol and system architecture for the wireless system. It is trademark of Semtech corporation. It is developed and managed by LoRa Alliance.
Acknowledgement Yes, every message is being acknowledged both in the uplink and downlink. Limited, it uses limited acknowledgements as it employs ALOHA protocol.
PER (Packet Error Rate) Less due to use of Ack. More (about 50% in common)
Firmware upgradation Easy, can be done after deployment Difficult as it need to be managed at application layer
Duty cycle No duty cycle limit. This is due to the fact that it employs FH LBT (Frequency Hopping Listen Before Talk) plus adaptive frequency agility band. 1% ( as per ETSI requirement)
Data transmission capability More Less
Protocol type Synchronous asynchronous (ALOHA)
Repeaters It is easy to use due to synchronous protocol and no limit on duty cycle. It is difficult to use due to duty cycle limitation.
Cost Cheaper as repeaters cover large distances without spending much. Costly
Power Efficiency As repeaters are used here, system will become more power efficient as they are solar powered and also battery powered. It is less power efficient as repeaters are impractical to use.
encryption Easy, Multiple devices are developed with easy configuration and keys are exchanged over the air using advanced PKI based AES algorithm. Complex, management of keys are carried out at the time of production for multiple devices.
dynamic range In the symphony link, end device calculates reverse link to the Gateway. Accordingly it adjusts transmit power, modulation rate and spreading factor (SF). Due to limited dynamic range, transmitter of LoRaWAN node near to the Base Station (or Gateway) prevents other nodes from being connected.
ADR (Adaptive Data Rate) This feature is used as performance and reliability optimization. This feature is used as capacity optimization. ADR changes are done using LoRaWAN servers.
Spectrum usage 28 times more (in US) and
7 times more (in Europe) compare to LoRaWAN
Less compare to Symphony Link
Capacity 4 times more than LoRaWAN Less compare to Symphony Link
MTU (Maximum Transmission Unit) Size Fixed to 256 bytes Varies based on spreading factor

Reference

Link Labs
Annapolis, MD 21401
Visit, Link Labs Website>> for more information.

LoRa and LoRaWAN Related Links

Following are links to LoRa and LoRaWAN.
Main page LoRa tutorial   LoRa Frequency Bands   LoRa protocol stack   LoRa MAC layer   LoRaWAN classes   LoRa features   LoRa Transceiver module   Difference between LoRa and LoRaWAN, Refer LoRa vs LoRaWAN   LoRa modulation   LoRa vs Zigbee  

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