Pusan National University

Lg Electronics Inc.

Yuvin Ha

Sanghwa Chung

Jihwan Kim

Sinae Chun

Jinhee Lee

Guang Jang

Jungdo Kim

Hyeonhui Kim

Myeongsoo Shin

Changshik Shin

Sangbum Ha

Disclosed is a device for reverse slot reservation in an industrial low-power wireless network, which includes: a child device configured to send a slot demand of the child device to a parent device through an information element (IE) and a solicitation (SOLICIT) packet included in an enhanced beacon (EB) and configured to select a required number of slots and respond using a Response packet to reserve the slots when an OFFER is received; and a parent device configured to transmit an OFFER packet to a device with the highest priority or a device selected in round-robin order when there is no priority on the basis of slot demands of child devices to start reverse slot reservation and configured to select some slots from among available slots of the parent device, add the selected slots to CellList, and transmit the OFFER packet to a corresponding child device.

Reverse slot reservation method and device in industrial low-power wireless network

Disclosed are a scheduling apparatus and method using a virtual slotframe in an industrial wireless sensor network in which devices on the network generate schedules that are efficient with regard to data traffic having various cycles by performing scheduling in a distributed manner through a virtual slotframe scheme, the scheduling apparatus and method including a packet classifier configured to manage, in a list, a point in time when a packet was generated by referring to a packet transmission record, a transmission record analyzer configured to analyze a traffic pattern on the basis of a list indicating the point in time when the packet was generated, a virtual slotframe schedule generation manager configured to generate a virtual slotframe schedule according to the traffic pattern when the traffic pattern is classified, and a schedule converter and aggregator configured to perform a conversion and an aggregation for a direct link schedule to be used for TSCH (Time Slotted Channel Hopping) operation.

Scheduling apparatus and method using virtual slot frame in industrial wireless network

Disclosed are a wearable device and method of controlling the same, which output more suitable image information on the basis of a state in which the wearable device is covered. The wearable device includes a wearable device body, a display unit provided in the wearable device body, a sensing unit included in the wearable device body, and configured to sense a region, in which the display unit is covered by an object, and a region in which the display unit is not covered, and a control unit configured to display first image information in a predetermined first region when the region in which the display unit is not covered corresponds to the predetermined first region, and display second image information in a predetermined second region when the region in which the display unit is not covered corresponds to the predetermined second region, as a result in which a portion of the display unit is covered by the object.

Wearable device and method of controlling the same

Growing community of inventors

Seoul, South Korea

Yuvin Ha