Abstract: A printing method performed by an image forming apparatus is provided. The image forming apparatus receives job information of content, and generates payment amount information based on the job information of the content. The image forming apparatus receives payment method information from a user, and generates billing information by using the payment amount information and the payment method information. The image forming apparatus transmits the billing information to a payment system.

Abstract: A printing method performed by an image forming apparatus is provided. The image forming apparatus receives job information of content, and generates payment amount information based on the job information of the content. The image forming apparatus receives payment method information from a user, and generates billing information by using the payment amount information and the payment method information. The image forming apparatus transmits the billing information to a payment system.

Abstract: Disclosed herein are an electronic tag, an ESL system, a method for setting time information of the ESL system, and a method for operating the ESL system. The electronic tag includes: a communication interface unit transmitting and receiving data; a display unit displaying the information of the product; a power supply unit supplying power; a control unit controlling the communication interface unit, the display unit, and the power supply unit and processing data; and a memory unit storing data required to process data in the control unit, and the control unit possesses time information appropriated in real time.

Abstract: The electronic shelf label system includes a management server unit storing product information regarding a product, a gateway unit including a plurality of gateways receiving a message containing the product information from the management server unit, and a plurality of electronic shelf label tag units communicating with the gateways, respectively, the plurality of electronic shelf label tag units each including a plurality of electronic shelf label tags receiving the product information from the gateway and displaying the received product information. The management server unit includes a database storing tag information regarding the electronic shelf label tags and product information displayed on the electronic shelf label tags such that the tag information and the product information are linked together.

Abstract: A mobile device providing position data of its own, the mobile device including: a Zigbee communication module executing Zigbee communication according to IEEE 802.15.4 standards; a global positioning system (GPS) module receiving a GPS signal and obtaining the position data of the mobile device; and a mobile communication module checking whether the mobile device departs a Zigbee communication network while executing the Zigbee communication via the Zigbee communication module, obtaining the position data of the mobile device via the GPS module when the mobile device departs the Zigbee communication network, and transmitting a position signal including the position data to a predetermined destination address.