A method executed by one or more active capacitive styluses and a sensor controller connected to sensor electrodes, the method comprising: the sensor controller repeatedly transmitting, using a first communication channel, said first communication channel being a default communication channel, a discovery packet for detecting any of the one or more active capacitive styluses; a first active capacitive stylus, out of the one or more active capacitive styluses, which has detected the discovery packet, transmitting, using the first communication channel, a discovery response packet in response to the discovery packet; the sensor controller transmitting, using the first communication channel, to the first active capacitive stylus, a configuration information request packet that requests configuration information including information indicative of a function of the first active capacitive stylus, in response to the discovery response packet; the first active capacitive stylus transmitting, using the first communication channel, the configuration information in response to the configuration information request packet; the sensor controller transmitting, using the first communication channel, a configuration packet to the first active capacitive stylus after having received the configuration information, wherein the configuration packet includes time slot designation information that assigns to the first active capacitive stylus a first time slot whose reference timing is provided by the discovery packet, and notifies a second communication channel allocated to the first active capacitive stylus; and the first active capacitive stylus transmitting to the sensor controller, using the second communication channel, operation state data indicative of an operation state of the first active capacitive stylus using the first time slot designated by the configuration packet; wherein different active capacitive styluses respectively have stylus identifiers which are different from each other; and the configuration information of the first active capacitive stylus includes a first stylus identifier, which is prestored in the first active capacitive stylus. the sensor controller repeatedly transmitting, using a first communication channel, said first communication channel being a default communication channel, a discovery packet for detecting any of the one or more active capacitive styluses; a first active capacitive stylus, out of the one or more active capacitive styluses, which has detected the discovery packet, transmitting, using the first communication channel, a discovery response packet in response to the discovery packet; the sensor controller transmitting, using the first communication channel, to the first active capacitive stylus, a configuration information request packet that requests configuration information including information indicative of a function of the first active capacitive stylus, in response to the discovery response packet; the first active capacitive stylus transmitting, using the first communication channel, the configuration information in response to the configuration information request packet; the sensor controller transmitting, using the first communication channel, a configuration packet to the first active capacitive stylus after having received the configuration information, wherein the configuration packet includes time slot designation information that assigns to the first active capacitive stylus a first time slot whose reference timing is provided by the discovery packet, and notifies a second communication channel allocated to the first active capacitive stylus; and the first active capacitive stylus transmitting to the sensor controller, using the second communication channel, operation state data indicative of an operation state of the first active capacitive stylus using the first time slot designated by the configuration packet; wherein different active capacitive styluses respectively have stylus identifiers which are different from each other; and the configuration information of the first active capacitive stylus includes a first stylus identifier, which is prestored in the first active capacitive stylus.