Abstract: The present disclosure relates to a sensor network, Machine Type Communication (MTC), Machine-to-Machine (M2M) communication, and technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the above technologies, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A device for measuring a distance, according to one embodiment of the present invention, includes a transceiver configured to transmit, to another device, a signal and receive, from the another device, another signal according to the signal, and a controller configured to determine a first interval based on the signal and the another signal and determine a distance between the device and the another device based on the first interval, a second interval regarding the another device, and a delay regarding an internal circuit of the device.

Abstract: The present disclosure relates to a 5th-Generation (5G) or pre-5G communication system to be provided to support a higher data rate than a 4th-Generation (4G) communication system like Long Term Evolution (LTE). A method for transmitting a signal in a communication system according to an embodiment of the present disclosure includes generating a Golay sequence for a weight value in which a correlation peak value is less than a preset threshold value, configuring a Short Training Field (STF) including the generated Golay sequence, and transmitting a signal for a Physical layer convergence procedure Protocol Data Unit (PPDU) including the STF.

Abstract: The present disclosure relates to a sensor network, Machine Type Communication (MTC), Machine-to-Machine (M2M) communication, and technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the above technologies, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Embodiments of the present invention provide a device and a method for estimating a position between wireless apparatuses using a signal transmitted and received between wireless apparatuses in a wireless communication system. A device of a first wireless apparatus for estimating a position comprises: a transceiver for transmitting and receiving a signal to and from a second wireless apparatus; and a position estimator for estimating a position of the second wireless apparatus using a signal transmitted and received through the transceiver.

Abstract: A method and apparatus for reducing power consumption in a mobile device of a wireless communication system when discovering a central node is provided. The method for operating of a terminal for discovering at least one central node in a wireless communication system includes: generating a probe request signal and transmitting the probe request signal to at least one central node; after transmitting the probe request signal, switching from a normal mode to a low power mode and driving the terminal in the low power mode; in response to a mode switch instruction signal being received from the central node, switching the terminal from the low power mode to the normal mode; and receiving a probe response signal to the probe request signal from the central node in the normal mode.

Abstract: The present disclosure relates to a sensor network, Machine Type Communication (MTC), Machine-to-Machine (M2M) communication, and technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the above technologies, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A device for measuring a distance, according to one embodiment of the present invention, includes a transceiver configured to transmit, to another device, a signal and receive, from the another device, another signal according to the signal, and a controller configured to determine a first interval based on the signal and the another signal and determine a distance between the device and the another device based on the first interval, a second interval regarding the another device, and a delay regarding an internal circuit of the device.

Abstract: The present disclosure relates to a 5th-Generation (5G) or pre-5G communication system to be provided to support a higher data rate than a 4th-Generation (4G) communication system like Long Term Evolution (LTE). A method for transmitting a signal in a communication system according to an embodiment of the present disclosure includes generating a Golay sequence for a weight value in which a correlation peak value is less than a preset threshold value, configuring a Short Training Field (STF) including the generated Golay sequence, and transmitting a signal for a Physical layer convergence procedure Protocol Data Unit (PPDU) including the STF.

Abstract: The present disclosure relates to a sensor network, Machine Type Communication (MTC), Machine-to-Machine (M2M) communication, and technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the above technologies, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Embodiments of the present invention provide a device and a method for estimating a position between wireless apparatuses using a signal transmitted and received between wireless apparatuses in a wireless communication system. A device of a first wireless apparatus for estimating a position comprises: a transceiver for transmitting and receiving a signal to and from a second wireless apparatus; and a position estimator for estimating a position of the second wireless apparatus using a signal transmitted and received through the transceiver.

Abstract: A method and apparatus for reducing power consumption in a mobile device of a wireless communication system when discovering a central node is provided. The method for operating of a terminal for discovering at least one central node in a wireless communication system includes: generating a probe request signal and transmitting the probe request signal to at least one central node; after transmitting the probe request signal, switching from a normal mode to a low power mode and driving the terminal in the low power mode; in response to a mode switch instruction signal being received from the central node, switching the terminal from the low power mode to the normal mode; and receiving a probe response signal to the probe request signal from the central node in the normal mode.

Abstract: A service relay device is provided. The service relay device includes a receiving unit which receives a service signal, and a service processing unit which changes information regarding an order of changing frequency channels included in the received service signal, using replacement frequency channels, and broadcasts the service signal. The service processing unit includes a detecting unit which detects the information regarding the order of changing frequency channels, a storage unit which stores information regarding replacement frequency channels, an information processing unit which replaces the information regarding the order of changing frequency channels, using the replacement frequency channels stored in the storage unit, and a relay unit which broadcasts a service signal. As a result, service signals are provided stably even in the fringe area.

Abstract: A service relay device is provided. The service relay device includes a receiving unit which receives a service signal, and a service processing unit which changes information regarding an order of changing frequency channels included in the received service signal, using replacement frequency channels, and broadcasts the service signal. The service processing unit includes a detecting unit which detects the information regarding the order of changing frequency channels, a storage unit which stores information regarding replacement frequency channels, an information processing unit which replaces the information regarding the order of changing frequency channels, using the replacement frequency channels stored in the storage unit, and a relay unit which broadcasts a service signal. As a result, service signals are provided stably even in the fringe area.

Abstract: Disclosed is a signal constructing method according to an adaptive packet format in a MIMO-WLAN (Multi-input multi-output Wireless LAN) system. A method is used to construct a plurality of signals in a MIMO-WLAN, with transmitting a data packet as a plurality of signals via a plurality of antennas. The method includes the steps of: constructing a data packet to include a preamble for packet transmission, an additional information region for data packet transmission in MIMO-WLAN system, and a service data unit; distributing data of the preamble to at least one of the plurality of signals; distributing data of the additional information region to at least one of the plurality of signals; and distributing data of the service data unit to at least one of the plurality of signals. The method is compatible with existing wireless LAN technology standard mode, and also provides high-speed data transmission rate.

Abstract: A MIMO transmission system and method of an OFDM-based wireless LAN system. The MIMO transmission system includes multiple transmission paths to channel antennas and receives and encodes plural rows of bit streams. The MIMO transmission system does not transmit the plural rows of bit streams through the same paths and channel antennas, but sequentially switches, OFDM-modulates, and sends bits of each bit stream to the plural paths such that the bit streams are not transmitted through the same paths and channel antennas. Through the bit exchange among the channel antennas, the MIMO transmission system can enhance diversity gains by the channel encoding in flat-fading environments having a small RMS delay spread.