Samsung Electronics Co., Ltd.

Dae-yong Sim

Ho-seok Lee

Lochan Verma

Jae-min Lee

Il-ju Na

Chil-Youl Yang

Si-hyung Kim

Hyung-Jick Lee

A method for waking a device from a power save mode to an active mode includes: transmitting, by a first device, a magic packet through a predetermined channel to a second device, which operates in the power save mode by repeating a doze state and an awake state according to a predetermined period of time, for notifying the second device to switch to the active mode; and retransmitting the magic packet to the second device through the predetermined channel if a response to the magic packet has not been received from the second device and a predetermined time has not elapsed after transmitting the magic packet through the predetermined channel.

Method and apparatus for waking device from power save mode

A method of measuring a state of a plurality of channels is provided. The method includes transmitting to a second device test signal information needed to transmit/receive a test signal for measuring the state of the plurality of channels; receiving an information received response from the second device, indicating that the second device has received the test signal; if the information received response is received, transmitting the test signal to the second device, using the test signal information, via the plurality of channels; and receiving from the second device the state information regarding the plurality of channels which has been measured by using the test signal.

Method and apparatus for measuring state of plurality of channels and for selecting idle channel

An idle channel scanning method and apparatus are provided. The method of scanning for an idle channel via a device communicating with a plurality of peripheral devices in the same frequency environment includes: allocating at least one of all frequency channels of the frequency environment to each peripheral device of the plurality of peripheral devices; requesting the plurality of peripheral devices a state of the frequency channels allocated to each peripheral device; and receiving information on the frequency channel state scanned by the plurality of peripheral devices in response to the request for the state of the frequency channels allocated.

Method and apparatus for scanning for an idle channel in a frequency environment

A method of merging cells in cognitive radio is provided. The method includes: requesting base stations to merge cells, measuring service ranges of the merged cells using the base stations, and exchanging cell-merging information between the base stations.

Growing community of inventors

Suwon-si, South Korea

Dae-yong Sim