A 6TisCH node that demonstrates initial synchronization of 6TiSCH networks using adaptive scan period and compares the connection time with fixed optimal scan period. Core implementation can be found at os/net/mac/tsch/tsch-adaptive-scan.h. The overview of os modifications and the sample implementation can be seen here.

Modes of operation

Checkout examples/6tisch/adaptive-scan/project-conf.h for available options. Primarily:

• ADAPTIVE_SCAN = 1 enables adaptive scan period else it fallsback to optimum scan period as specified in Optimal Initial Synchronization Time in Minimal 6TiSCH Configuration by A. Karalis et al.
• BROADCAST_BIAS = N biases the broadcast channel selection by the advertisor to the integeral N extent.
• TSCH_CONF_DEFAULT_HOPPING_SEQUENCE specifies the broadcast channel sequence used by the advertisors.
• TSCH_CONF_EB_PERIOD specifies the multiple of slotframe duration used as the delay between two consecutive EBs.

By default, the node assign themselves the role of reciever and advertisor in the ratio of 3:1.

Cooja setup

To install Cooja:

sudo apt update
sudo apt install gcc-msp430 git make ant gcc-arm-none-eabi -y
git clone --recursive --depth=1 <this repository url> adaptive-scan-repo
cd adaptive-scan-repo/tools/cooja && ant run

Open the simulation examples/6tisch/adaptive-scan/cooja-sim.csc (or compile node.c) in Cooja and then start the simulation. To view the result status, filter the logs with Result status and for final results Results. To save the log data, select the logs (Ctrl+A) and then choose Copy selected in the Edit menu. For detailed logs, enable ADAPTIVE_SCAN_DEBUG and enter DATA in the log filter.