Samsung Electronics Co., Ltd.

Ho-seok Lee

Chang-Yeul Kwon

Jae-min Lee

Dae-yong Sim

Jae-hwa Kim

Jae-Moon Jo

Se-young Shin

Seung-seop Shim

Seong-Wook Lee

Guoping Fan

Dong-Hwi Roh

Joong-suk Park

Moon-young Choi

Si-hyung Kim

Hyung-Jick Lee

Hyung-jick Lee

A method and an apparatus are provided for enabling a legacy station to perform virtual carrier sensing when a plurality of stations with heterogeneous capabilities coexist in a wireless network. The method includes receiving first data compliant with a first protocol, and transmitting second data compliant with a second protocol, where the first protocol is downward compatible with the second protocol.

Method and apparatus for transmitting and receiving legacy format data in high throughput wireless network

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

A method of and an apparatus to improve stability and efficiency during data transmission performed over a wireless network includes transmitting a first data frame containing a plurality of data units to a receiving device, receiving from the receiving device a receipt of confirmation for each data unit received by the receiving device, and transmitting a second data frame containing at least one of the plurality of data units that have not been transmitted or received, according to the receipt of confirmation for each data unit received by the receiving device.

Method and apparatus to transmit and/or receive data via wireless network and wireless device

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.

Method of merging cells in cognitive radio

A method and apparatus for reducing power consumption by controlling listening periods in a wireless telecommunications device having a plurality of power-saving modes are provided. The method includes: setting a first power-saving mode and a second power-saving mode, each of the first and second power-saving modes having a power-saving mode period in which power is saved and data is not transmitted and received, and a standby period in which data is transmitted and received; detecting the standby mode periods from the first and second power-saving modes; adjusting starting periods of the first and second power-saving modes so that the detected standby mode periods of the first and second power-saving modes overlap; and controlling power according to the adjusted first and the second power-saving modes.

Method and apparatus for saving power by controlling listening periods in wireless telecommunication device having a plurality for power-saving modes

A method and an apparatus are provided for enabling a legacy station to perform virtual carrier sensing when a plurality of stations with heterogeneous capabilities coexist in a wireless network. The method includes receiving first data via a bonded channel formed by channel bonding first and second adjacent channels, and transmitting second data via each of the first and second adjacent channels, the second data being a clear-to-send (CTS) frame or a request-to-send (RTS) frame.

Method and apparatus for transmitting and receiving data in wireless network

A navigation system for downloading adjacent position information of a current user position using a wireless network to display the downloaded information on a screen and method thereof are provided. The method includes the steps of: setting a starting point, a destination, and specific information to be displayed on a screen; calculating a current user position based on position information received from a wireless network and identification (ID) information; displaying a user movement based on information stored in a database, or, alternatively, requesting a server to send specific information about the adjacent position which is set in the setting step; and downloading only the specific information to display the downloaded result on a screen while displaying a user movement on the corresponding screen. According to the navigation system and method thereof, only necessary information about the adjacent position is downloaded, thereby improving the efficiency of the navigation system.

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Anyang-si, South Korea

Ho-seok Lee