
    Calculate the perimeter of the wireless sensor coverage area around a patient's bed to ensure continuous vital sign monitoring, where the coverage forms a perfect circle with the bed at its center. The coverage area's boundary length must be determined to properly position backup sensors and maintain uninterrupted signal reception for patient safety monitoring.
    

    
def circle_circumference(r):
    """
    Calculate the perimeter of the wireless sensor coverage area around a patient's bed to ensure continuous vital sign monitoring, where the coverage forms a perfect circle with the bed at its center. The coverage area's boundary length must be determined to properly position backup sensors and maintain uninterrupted signal reception for patient safety monitoring.
    

    """
def circle_circumference(r):
    """
    Calculate the perimeter of the wireless sensor coverage area around a patient's bed to ensure continuous vital sign monitoring, where the coverage forms a perfect circle with the bed at its center. The coverage area's boundary length must be determined to properly position backup sensors and maintain uninterrupted signal reception for patient safety monitoring.
    

    """
    perimeter = 2 * 3.1415 * r
    return perimeter