osd-contiki/apps/orchestra

Orchestra

Overview

Orchestra is an autonomous scheduling solution for TSCH, where nodes maintain their own schedule solely based on their local RPL state. There is no centralized scheduler nor negociatoin with neighbors, i.e. no traffic overhead. The default Orchestra rules can be used out-of-box in any RPL network, reducing contention to a low level. Orchestra is described and evaluated in Orchestra: Robust Mesh Networks Through Autonomously Scheduled TSCH, ACM SenSys'15.

Requirements

Orchestra requires a system running TSCH and RPL. For sender-based unicast slots (ORCHESTRA_UNICAST_SENDER_BASED), it requires RPL with downwards routing enabled (relies on DAO).

Getting Started

To use Orchestra, add a couple global definitions, e.g in your project-conf.h file.

Disable 6TiSCH minimal schedule:

#define TSCH_SCHEDULE_CONF_WITH_6TISCH_MINIMAL 0

Enable TSCH link selector (allows Orchestra to assign TSCH links to outgoing packets):

#define TSCH_CONF_WITH_LINK_SELECTOR 1

Set up the following callbacks:

#define TSCH_CALLBACK_NEW_TIME_SOURCE orchestra_callback_new_time_source
#define TSCH_CALLBACK_PACKET_READY orchestra_callback_packet_ready
#define NETSTACK_CONF_ROUTING_NEIGHBOR_ADDED_CALLBACK orchestra_callback_child_added
#define NETSTACK_CONF_ROUTING_NEIGHBOR_REMOVED_CALLBACK orchestra_callback_child_removed

To use Orchestra, fist add it to your makefile APPS with APPS += orchestra.

Finally:

• add Orchestra to your makefile APPS with APPS += orchestra;
• start Orchestra by calling orchestra_init() from your application, after including #include "orchestra.h".

Configuration

Orchestra comes with a number of pre-installed rules, orchestra-rule-*.c. You can define your own by using any of these as a template. A default Orchestra configuration is described in orchestra-conf.h, define your own ORCHESTRA_CONF_* macros to override modify the rule set and change rules configuration.