Samsung Electronics Co., Ltd.

Staccato Communications, Inc.

Institute of Radio Engineering and Electronics of Ras

Veebeam Corporation

Yong-suk Kim

Won-yong Yoon

Wan-Jin Kim

Yang-Ick Joo

Doo-Seop Eom

Woo-Kyung Lee

Tae-Jin Lee

Thenmozhi Arunan

Manoj Choudhary

Ye-Hoon Lee

Jong-Hun Park

Dan Meacham

Sunil Dilipkumar Jogi

Seung-young Park

Prashant Wason

Balaji Srinivas Holur

Jong-soo Oh

Mohsen Abdellaoui

Kyun-hyon Tchah

Seung-Soo Yang

Won-hee Lee

Kwang-Ho Kim

Do-hoon Kwon

Torbjorn Larsson

Arun Naniyat

Taek-Kyun Shin

Jun-haeng Cho

Ki-soo Chang

Chang-Mo Chung

Bin Zhen

Tae-jin Lee

Seung-hyong Rhee

Roberto Aiello

Woo-kyung Lee

Kyeong Hur

Starkov Sergey

Yang-ick Joo

Jae-won Yoo

Kyun-hyon Cha

Oh-seok Kwon

Kyun-hyon Tcha

Dmitriev Alexandre

Won-Yong Yoon

A mobile device and a computational system including same are described. The mobile device includes a sensor unit having a motion sensor and/or a touch sensor that provides sensing information. The sensing information is applied to a universal serial bus user interface (USB UI) data generation unit and is changed into USB UI data before being output as USB UI data using a USB communication technique.

Mobile device and computational system including same

A method for transmitting data from a second device to a first device in a communication system including at least two devices that enter a sleep mode and a wake-up mode in an alternative manner. The first device of which state is changed from the sleep mode to the wake-up mode broadcasts a message containing state change information to adjacent devices. The second device that receives the message containing the state change information informs the first device of the presence of data to be transmitted. The first device that is informed of the data to be transmitted sends a message permitting the data transfer. The second device upon receiving the message transmits the data to the first device.

Method and system for power saving in asynchronous communication system

A TFI-OFDM transmission system for a UWB communication that includes a data generator generating data having a rate corresponding to a transmission speed mode, a convolutional encoder convolutional-encoding the data into a certain number of data groups, an OFDM modulator outputting OFDM symbols by executing an IFFT the data groups a buffer temporarily storing the OFDM symbols to sequentially transmit the OFDM symbols in a time domain at least two times, and a frequency generator generating certain frequencies to transmit the OFDM symbols in a certain number of frequency bands corresponding to transmission channels.

TFI-OFDM transmission/reception systems for UWB communication and methods thereof for mitigating interference from simultaneously operating piconets

An anti-collision method and system in a wireless network system are provided. The anti-collision method includes: transmitting a beacon signal including information related to an owner type of a first device and information related to an available time interval of the first device; transmitting information related to a time interval selected from the available time interval to a second device having receiving the beacon signal from the first device; and updating the information related to the available time interval using information related to the selected time interval. The information related to the owner type of the first device includes information indicating one of a unicast device and a multicast device.

Anti-collision method and system in wireless network system

Disclosed is a handoff processing method capable of restarting fast communications. The handoff processing method stores in a handoff buffer Host Control Interface (HCI) data and transmission data upon communications in a state where an Access Point is interlinked with an external device. Further, the method forwards the HCI data and the transmission data buffered in the handoff buffer to a new Access Point (AP) transmitting a message indicating setup completion of a connection if the message indicating setup completion of a connection with the external device is transmitted from the new AP after a handoff occurs as the external device moves. Accordingly, throughputs are not lowered despite handoff occurrences in poor wireless channel environments, so that service quality can be enhanced.

Short-range wireless communication system and a handoff processing method therefor

A method and system for determining a state of a first node in a wireless network consisting of a plurality of nodes. The first node determines one of at least two power sensitivity levels by considering at least one of an available power and a standby packet. The first node determines whether it remains in active state or inactive state by considering a power sensitivity level transmitted from at least one second node which corresponds to the first node and the determined power sensitivity level. Also, the corresponding node has an identical state to the first node, so that unnecessary power consumption can be prevented.

Method and system for determining state of node during reserved slot in wireless network

A method for informing an availability of traffics of a wireless device configuring a wireless network. The method includes: broadcasting one of a first reception mode and a reception mode over the network. In the first reception mode, the wireless device is available or unavailable to receive the traffic depending on an information received by the wireless device during a beacon period, and in the second reception mode, the wireless device is available to receive the traffic regardless of whether the information is received.

Method for informing the availability of reception of traffics and a method for determination of active or inactive state in wireless communication networks using contention based distributed MAC

A power saving system in distributed wireless personal area network and a method thereof are disclosed. A PS (Power Save) anchor that provides information about hibernating devices to a beacon group through power save information elements in media access control for a wireless personal area network based on a wireless mobile ad-hoc network. Accordingly, all devices in the given wireless personal area network can schedule their active modes and hibernating modes according to hibernating intervals of destination devices with which the devices want to communicate. This can effectively reduce the necessity of the devices' waiting for the destination devices to awake from the hibernating mode as the devices maintain their idle state, and thus the power consumption of all the devices in the network can effectively be reduced.

Power saving system in distributed wireless personal area network and method thereof

Disclosed is a channel time allocation method in a high rate WPAN and a wireless system using the same. In the WPAN environment synchronized by a synchronization signal broadcasted from a coordinator, the channel time allocation method includes transmitting a channel time allocation request command corresponding to a property of an application data to be transmitted to the coordinator by any one of devices linked to the WPAN, and the coordinator allocating the channel time, inserting information of the allocated channel time to the synchronization signal, and broadcasting the synchronization signal to the devices. Accordingly, the channel time is allocated to fit for the property of the VBR stream data such as the MPEG-2 video so that the QoS of the VBR stream is provided. At the same time, reliability of the transmission of I frame is enhanced so that success rate of decoding the frame is increased.

Channel time allocation method in high rate WPAN

Disclosed is a method of performing a supervisor handover with ease prior to the supervisor handover by selecting a candidate supervisor on a Bluetooth High Rate (HR) subnet having one supervisor and a plurality of members. The method comprises the steps of selecting the candidate supervisor eligible for the new supervisor among the members on the HR subnet prior to the supervisor handover, and broadcasting an inquiry message to all the members on the HR subnet by the candidate supervisor when the supervisor handover is initiated. The method further comprises the step of electing the candidate supervisor as the new supervisor when all members on the HR subnet respond to the inquiry message.

Method for performing bluetooth high rate supervisor handover

A data slot allocation method for a stream delivery in an ultra wide band (UWB) wireless personal area network (WPAN) based on an ad-hoc network of a distributed network topology. The number of data slots allocable to each stream, including a new stream, to be transferred is calculated. The necessary data slots are relinquished to the new stream from existing streams when the number of the allocable data slots is less than a number of preset data slots of the new stream.

Data slot allocation method in distributed wireless personal area networks

A system for dynamically shifting beacons in a distributed wireless network and a method thereof are disclosed. In a medium access control for a wireless personal area network based on a mobile ad-hoc network, beacons are shifted to other free lower slots in order to reduce the size of a beacon period. Also, collisions that may occur during the shifting of the beacons are detected and avoided. According to the system and method, the size of the beacon period for transmitting data can sufficiently be secured by dynamically reducing the size of the beacon period without collisions.

System for dynamically shifting beacons in distributed wireless network and method thereof

A preamble generating method which includes computing (N) chaotic samples; transforming the (N) chaotic samples into (N) binary values of certain bits, respectively, and computing a chaotic sequence bit successively using the (N) binary values; and generating a preamble based on the chaotic sequence bit. By using the sequence bit from the chaotic samples, a plurality of preambles with optimum auto-correlation and cross-correlation properties is generated.

Method and apparatus for generating preamble using chaotic sequence

A wireless communication apparatus and a method using the same are capable of transmitting data while changing a packet type according to a packet error rate. The wireless communication apparatus has a transceiving portion for receiving and transmitting a data packet from and to an external device, a packet type selecting portion, a calculation portion for calculating a packet error rate and transmission time of a transmitted data packet, and a control portion for controlling the packet type selecting portion to select a proper packet type for a transmission of a next data packet based on the calculated packet error rate so that the data can be transmitted within a minimum time and with a maximum efficiency. The wireless communication apparatus maximizes data transmission efficiency since it can transmit the data packet while changing the packet type adaptively to the packet error rate.

Wireless communication apparatus and a method using the same

A data slot allocation method allowing a plurality of devices in a wireless personal area network (WPAN) to satisfy the required QoS condition for the data stream transmission. The method includes allocating a specific number of data slots of a superframe to the plurality of the devices based on the QoS information; additionally allocating a certain number of data slots to a first device when the first device transmitting a data stream is allocated data slots less than a number of required data slots for the data stream transmission; and reserving the additional data slots for the first device by reducing a number of data slots to be allocated to the other devices, excluding the first device. Accordingly, the data slots can be fairly distributed to the devices.

Device in distributed wireless personal area network and data slot allocation method

Growing community of inventors

Daejeon, South Korea

Yong-suk Kim