CC1310: Does WOR on the CC1310 work in Long Range mode?

Hi,

For SimpleLink Long Range Mode, a time-synchronous approach is preferred. All nodes in a network would use a common time-base and wake-up in predefined slots. Use either TI 15.4 stack if you want a comprehensive solution or have a look at the Synchronous Packet example if you want to use the raw proprietary API. You can also send  and receive packets with EasyLink using synchronous timing which is much simpler.

Background: It does usually not make sense to implement a Wake-on-Radio scheme with the SimpleLink Long Range Mode.  In this mode, it is possible to recover a signal even from below the noise floor (the noise floor is quite high in many regions). On the Gen-FSK PHY, we use RSSI measurement and preamble quality check to quickly determine a signal on the air after wake-up. Both techniques are useless for SimpleLink Long Range mode if the signal level is below the noise floor.

Kian said:

Both the transmitters and receivers run on batteries. I am just wondering whats the current consumption between WOR and synchronous timing? I presume WOR will be more suitable for my application since I am not transmitting at regular intervals.

This can not be said in a general manner. There are many things to consider:

• Wake-on-Radio uses a simple system design with a very long preamble to make nodes catching a signal. When any node finds the preamble on the air, it will stay awake and try to receive the message until the address filter stops reception.
• You need to wake up often enough to not miss a packet
• The preamble needs to match the wake-up interval. But the longer the interval, the higher the utilization of the channel. Not only might this violate regulations, but means also that you waste a lot of channel space for preambles.

With synchronous timing, the channels can be used much more efficiently, but the system design is trickier. We don't have any collaterals/guides for the system design and so don't we provide information on power consumption unfortunately. For wake-on-radio, you could measure our wake-on-radio example and then extrapolate that calculation to your system design taking above points into consideration.

Kian said:

With WOR and using 50 kbps,2-GFSK, 25kHz deviation @433Mhz, I wonder if it is possible to achieve a max 200m distance if both side are using PCB trace antennas

With nothing in between, yes. With a lot of steel and concrete in between, maybe. I suggest to take a launchpad and check. There is a 433 Mhz CC1310 launchpad out now.