Lg Electronics Inc.

Samsung Electronics Co., Ltd.

Sung June Youn

Ki Seon Ryu

Won Yong Yoon

Soo Jin Chae

Hyo Sik Lee

Eun-Jin Yun

Won Sik Yoon

A method of operating a controller that controls a non-volatile memory device having a first memory block and a second memory block. The controller may detect invalid data of the first memory block, determine whether the detected invalid data is less than a reference value, and execute a secure erase operation of changing a voltage distribution of the detected invalid data based on a result of the determination. According to this method, it may be possible to enhance security of data stored in the non-volatile memory device, to prevent a physical erase operation from being excessively performed, and to increase the life span of the non-volatile memory device.

Controller and method of operating the same

A method for supporting coexistence in a mobile station configured for supporting a coexistence mode of a primary wireless communication system and a secondary wireless communication system. The method comprises transmitting to a base station, via the mobile station, a registration request (REG-REQ) message comprising coexistence capability information, receiving a registration response (REG-RSP) message comprising information about support of the coexistence mode in response to the REG-REQ message, and transmitting to the base station, via the mobile station, a sleep mode request (MOB_SLP-REQ) message comprising first coexistence information for requesting a band adaptive modulation and coding (AMC) for adjacent subcarrier permutation.

Method for supporting coexistence considering while subchannel allocation in a broadband wireless access system

A method for supporting coexistence in a mobile station is provided. The method for supporting coexistence in the mobile station includes, at the mobile station, turning on Bluetooth at a start point of a WiMAX downlink subframe, stopping the operation of the Bluetooth if WiMAX channel quality of the mobile station becomes less than a threshold value during the operation of the Bluetooth, and, at the mobile station, turning off the operation of the Bluetooth at the start point of a WiMAX uplink subframe. Accordingly, it is possible to solve fragmentation by minimizing the interruption of the WiMAX transmission/reception and to improve WiMAX downlink throughput by restricting Bluetooth data transmission/reception according to the WiMAX channel quality.

Method for supporting coexistence in a mobile station

A method for supporting coexistence with a wireless personal area network (WPAN) is provided. A method for supporting coexistence with a WPAN in a mobile station which periodically receives a beacon signal for local wireless communication includes, at the mobile station, calculating the numbers of uplink frames which overlap with the beacon signal, configuring a bitmap using the calculated frame numbers, and transmitting coexistence information including the bitmap to a base station. Accordingly, when a broadband wireless access system and WiMedia or ZigBee are simultaneously used, a beacon signal of WiMedia or ZigBee can be efficiently protected from the interruption of the broadband wireless access system and thus WiMedia or ZigBee can be normally operated.

Method for supporting coexistence with wireless local area network

A method for supporting coexistence in a mobile station for supporting a coexistence mode of WiMAX and secondary wireless communication system while considering subchannel allocation, the method comprises, requesting a band adaptive modulation and coding (AMC) for adjacent subcarrier permutation to a base station by transmitting first coexistence information, after the secondary wireless communication is turned on, and requesting a release of the adjacent subcarrier permutation to the base station by transmitting second coexistence information, if the secondary wireless communication system is turned off. Accordingly, it is possible to provide simultaneity of different wireless communications when a sleep mode is used and improve simultaneity of different wireless communications even when the sleep mode is not used.

Growing community of inventors

Gyeonggi-do, South Korea

Sung June Youn