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RTC Interface#

Purpose#

RTC Interface is an interface to publish the decision status of behavior planning modules and receive execution command from external of an autonomous driving system.

Inner-workings / Algorithms#

Usage example#

// Generate instance (in this example, "intersection" is selected)
rtc_interface::RTCInterface rtc_interface(node, "intersection");

// Generate UUID
const unique_identifier_msgs::msg::UUID uuid = generateUUID(getModuleId());

// Repeat while module is running
while (...) {
  // Get safety status of the module corresponding to the module id
  const bool safe = ...

  // Get distance to the object corresponding to the module id
  const double start_distance = ...
  const double finish_distance = ...

  // Get time stamp
  const rclcpp::Time stamp = ...

  // Update status
  rtc_interface.updateCooperateStatus(uuid, safe, start_distance, finish_distance, stamp);

  if (rtc_interface.isActivated(uuid)) {
    // Execute planning
  } else {
    // Stop planning
  }
  // Get time stamp
  const rclcpp::Time stamp = ...

  // Publish status topic
  rtc_interface.publishCooperateStatus(stamp);
}

// Remove the status from array
rtc_interface.removeCooperateStatus(uuid);

Inputs / Outputs#

RTCInterface (Constructor)#

rtc_interface::RTCInterface(rclcpp::Node & node, const std::string & name);

Description#

A constructor for rtc_interface::RTCInterface.

Input#

  • node : Node calling this interface
  • name : Name of cooperate status array topic and cooperate commands service
    • Cooperate status array topic name : ~/{name}/cooperate_status
    • Cooperate commands service name : ~/{name}/cooperate_commands

Output#

An instance of RTCInterface

publishCooperateStatus#

rtc_interface::publishCooperateStatus(const rclcpp::Time & stamp)

Description#

Publish registered cooperate status.

Input#

  • stamp : Time stamp

Output#

Nothing

updateCooperateStatus#

rtc_interface::updateCooperateStatus(const unique_identifier_msgs::msg::UUID & uuid, const bool safe, const double start_distance, const double finish_distance, const rclcpp::Time & stamp)

Description#

Update cooperate status corresponding to uuid. If cooperate status corresponding to uuid is not registered yet, add new cooperate status.

Input#

  • uuid : UUID for requesting module
  • safe : Safety status of requesting module
  • start_distance : Distance to the start object from ego vehicle
  • finish_distance : Distance to the finish object from ego vehicle
  • stamp : Time stamp

Output#

Nothing

removeCooperateStatus#

rtc_interface::removeCooperateStatus(const unique_identifier_msgs::msg::UUID & uuid)

Description#

Remove cooperate status corresponding to uuid from registered statuses.

Input#

  • uuid : UUID for expired module

Output#

Nothing

clearCooperateStatus#

rtc_interface::clearCooperateStatus()

Description#

Remove all cooperate statuses.

Input#

Nothing

Output#

Nothing

isActivated#

rtc_interface::isActivated(const unique_identifier_msgs::msg::UUID & uuid)

Description#

Return received command status corresponding to uuid.

Input#

  • uuid : UUID for checking module

Output#

If auto mode is enabled, return based on the safety status. If not, if received command is ACTIVATED, return true. If not, return false.

isRegistered#

rtc_interface::isRegistered(const unique_identifier_msgs::msg::UUID & uuid)

Description#

Return true if uuid is registered.

Input#

  • uuid : UUID for checking module

Output#

If uuid is registered, return true. If not, return false.

Assumptions / Known limits#

Future extensions / Unimplemented parts#