Abstract:
PURPOSE: A method and an apparatus for direct link setup in wireless local area network are provided to enhance convenience of a user by controlling direct link setup between stations through recognition of a gesture of a user. CONSTITUTION: A gesture recognition part(101) senses a movement of user. A controller(103) generates a transmitting station/receiving station information with an analysis of a gesture signal. The controller outputs a control signal. The control signal comprises a transmission side station/receiving side station information. The user terminal is connected through a direct link to the transmission side station and receiving side station. A wireless communications unit(104) transmits a control signal through a wireless LAN(Local Area Network) with an access point AP(Access Point).
Abstract:
A CLO(Cross Layer Optimization)-based MAC(Medium Access Control) system and a method thereof are provided to efficiently implement QoS(Quality of Service)-guaranteed transmission by horizontally arranging 7 layers of each OSI(Open System Interconnection) model and making CLO information for each layer shared through API(Application Programming Interface) pipelines so that every layer can share various information for many dynamic changes in a wireless environment. A CLO-based MAC system(403) comprises an application API pipeline(401), a MAC API pipeline(402), a Tx packet processing unit, an Rx packet processing unit and a shared pool memory(410). The application API pipeline(401) is provided to make a connection with an upper interface. The MAC API pipeline(402) is provided to make a connection with a lower interface. The Tx packet processing unit receives a CLO application policy descriptor and a CLO MAC policy descriptor from the application API pipeline(401) and the MAC API pipeline(402) and transmits Tx packets to a physical layer. The Rx packet processing unit forwards CLO information for Rx packets, received from the physical layer, to the API pipelines(401,402). The shared pool memory(410) stores Tx packets and Rx packets.
Abstract:
PURPOSE: An apparatus and a method for exchanging a communication message between central controllers using packet ring configuration are provided to perform an IPC(Inter Processor Communication) transmission without an ethernet switch. CONSTITUTION: MPs(Main Processor)(201a,201b) are provided for duplexing. Packet rings(205a,205b) transfer an IPC message. A line card is connected to the packet rings(205a,205b) and exchanges an IP message. A unit exchanges a message by putting routing information in an IPC message through the packet rings(205a,205b), and data forwarding is made through an interface(212) between NPs(Network Processor) and a switch fabric(213). The MPs(201a,201b) include IPC packet ring MAC(Media Access Control) units(203a,203b) for interfacing with the packet rings(205a,205b). Each line card includes a CP(Control Processor) managing multicast groups, performing system initialization and adding an entry to a forwarding table. The CP includes an IPC packet ring MAC unit for interfacing with the packet rings(205a,205b).
Abstract:
PURPOSE: A device and a method for constructing an MAC(Medium Access Control) frame suitable for a wireless LAN(Local Area Network) of an OFDM(Orthogonal Frequency Division Multiplexing) method is provided to effectively process an information transmission between a mobile terminal and a base station. CONSTITUTION: A downward transmission region includes a frame header, a downward control signal transmission region and a downward data signal transmission region. An upward transmission region includes an upward competition transmission region, an upward control signal transmission region and an upward data signal transmission region. The upward competition transmission region is located in a start part of the upward transmission region in order to perform a rapid competition signal process. While implementing hardware, a spare time is secured to process a result of an upward competition section.
Abstract:
본 발명은 매장 내 LED 조명의 밝기 제어가 가능한 조명 네트워크와 가시광 무선 통신을 이용하여 마트에서 수시로 변경되는 제품의 가격 및 해당 제품의 할인 행사 내용 등과 같은 제품의 정보를 실시간으로 제공하며, 제품의 정보에 따라 조명 제어 스케줄러로부터 제어된 조명의 밝기가 제대로 반영되는지를 확인할 수 있는 매장 관리 장치 및 그 방법에 관한 것이다.