Abstract: The present invention relates to an environmental load assessment system, which is capable of efficiently and simply assessing an environmental load of a building in all stages (e.g., a planning stage, a design stage, a construction stage, and a use stage after construction) in doing executing a business by subdividing an assessment process, such as simple assessment in the design stage, detailed assessment in the start stage, and site assessment in the construction stage according to the progress of a construction project.

Abstract: The present invention relates to an environmental load assessment system, which is capable of efficiently and simply assessing an environmental load of a building in all stages (e.g., a planning stage, a design stage, a construction stage, and a use stage after construction) in doing executing a business by subdividing an assessment process, such as simple assessment in the design stage, detailed assessment in the start stage, and site assessment in the construction stage according to the progress of a construction project.

Abstract: A multi-channel media access control (MAC) method for Wireless Local Area Network (WLAN) devices with single radio interface is provided. The method includes starting a channel coordination window (CCW) that is repeated with a period P, allocating an arbitrary WLAN device pair on a common channel to a destination channel by using a channel utilization vector that indicates whether each of N channels is occupied or available during CCW, and switching the arbitrary WLAN device pair to the destination channel.

Abstract: A multi-channel scheduling method in a wireless network is provided. The wireless network includes a plurality of Wireless Local Area Network (WLAN) device with a single radio interface. A regular time interval P and a Channel Coordination Window (CCW) to be repeated in a period of P are set. A request is made such that the plurality of devices are tuned to a first channel at a start point of the CCW. A pair of arbitrary WLAN devices among the plurality of WLAN devices is allowed to transmit control frames in the regular time interval P. The control frames are a transmission proposal control frame for proposing communication in a second channel and a response frame, responding to the transmission proposal control frame, for indicating whether the second channel has been accepted or rejected. The arbitrary WLAN device of the pair are switched to the second channel after acceptance.

Abstract: Disclosed is a wireless universal serial bus system that includes a device; a first host communicating with the device according to a wireless universal serial bus protocol; and a second host communicating with the device according to a wireless universal serial bus protocol, wherein when the first host receives a beacon from the second host, the first host provides new host information read out from the beacon to the device.

Abstract: Disclosed is a wireless universal serial bus system that includes a device; a first host communicating with the device according to a wireless universal serial bus protocol; and a second host communicating with the device according to a wireless universal serial bus protocol, wherein when the first host receives a beacon from the second host, the first host provides new host information read out from the beacon to the device.

Abstract: A method and apparatus are provided for receiving data in a wireless local area network (WLAN) communication system, where a first control signal to check if it is possible to receive data is received, and, when it is possible to receive data, waiting for data and when it is impossible to receive data, transmitting a second control signal representing data reception impossibility. Herein, the second control signal comprises information that enables data transmission when a second control signal is not received during a time interval.

Abstract: Disclosed is a wireless universal serial bus system that includes a device; a first host communicating with the device according to a wireless universal serial bus protocol; and a second host communicating with the device according to a wireless universal serial bus protocol, wherein when the first host receives a beacon from the second host, the first host provides new host information read out from the beacon to the device.

Abstract: A method and system for transmitting and receiving a signal between first and second mobile nodes is provided. The method and system offers improvements to the throughput of an overall wireless local area network. When the first mobile node receives a data frame from the second mobile node, third mobile nodes can also transmit and receive the data frame. The first mobile node sends an acknowledgement (ACK) frame for notifying that the data frame has been completely received to the second mobile node through a common channel.

Abstract: A packet forwarding system to transfer packets through a plurality of interfaces by reading out information for the packet forwarding beforehand includes a packet processor that organizes and processes data to be transferred into packets, a packet memory storing the organized packets, a plurality of interfaces respectively transferring the packets stored in the packet memory depending on destinations of the packets, and a packet forwarding manager managing an packet information to transfer the packets through the plurality of the interfaces, respectively, and to control transfer of the packets immediately through a corresponding interface of the plurality of the interfaces by reading out the packet information before the packet forwarding. Accordingly, the fast packet forwarding is realized by processing the packet information read and the actual packet forwarding in parallel.

Abstract: A non-agile channelization method for multichannel medium access control (MAC) is provided, in which an available channel is categorized as an agile or non-agile channel, an operation mode of the channel categorized as the non-agile channel is selected, and multichannel switching is performed according to the selected operation mode. The non-agile channelization method for multichannel MAC enables non-agile channel switching to create a connected network, and allows agile and non-agile channel switching to coexist to avoid a change in existing hardware.

Abstract: Disclosed is a wireless universal serial bus system that includes a device; a first host communicating with the device according to a wireless universal serial bus protocol; and a second host communicating with the device according to a wireless universal serial bus protocol, wherein when the first host receives a beacon from the second host, the first host provides new host information read out from the beacon to the device.

Abstract: A method to transfer a plurality of data stored in a memory using one instruction. In a memory including at least two regions to which the addresses are assigned respectively, data are allocated to the addresses in sequence, and the allocated data are transferred using one instruction. At least one block is generated, which transfers data using one instruction, and it is instructed to include the data in the at least one block. The data in the block are linked with each other, and the number of paths linking two data is calculated with respect to the at least one block. The data are linked using shortest paths in consideration of the number of the linking paths, and the data are allocated by the addresses using the shortest paths.

Abstract: An apparatus and method of receiving and transmitting data in a wireless local network is provided. An apparatus for receiving data in a wireless local network includes: a congestion determiner which determines whether there is a congestion in a buffer storing received data if the data is received via a prioritized contention access (PCA) period; and a congestion information transmitter which transmits, in the PCA period or a beacon period (BP), congestion generation information in a medium access control (MAC) frame or a beacon frame if there is the congestion in the buffer.

Abstract: A contention reduction apparatus and method in a prioritized contention access (PCA) method of a Wireless Personal Area Network are provided. A contention reduction apparatus of a Wireless Personal Area Network includes: a prioritized contention access (PCA) section retriever which retrieves a PCA section from beacons received for a beacon period (BP); a PCA section divider which divides the retrieved PCA section; a device selector which selects devices using the PCA section; and a PCA section allocator which allocates the divided PCA section to the selected devices.

Abstract: An apparatus and method of merging beacons in a wireless local network are provided. The method of merging beacons in a wireless local network includes: calculating a continuous occurrence frequency of a received alien beacon period (BP); comparing the calculated occurrence frequency with a certain reference occurrence frequency; and merging a beacon group of a corresponding device with an alien beacon group when the calculated occurrence frequency is greater than or equal to the reference occurrence frequency.

Abstract: An apparatus for preventing a device address from conflicting in a WiMedia media access control (MAC), the apparatus including: a device address conflict determination unit which determines whether a conflict between a device address of the apparatus and alien device addresses included in a received alien beacon occurs; a device address generation unit which regenerates the device address of the apparatus when the conflict occurs and a beacon group of the apparatus is not a reference beacon group; a device address information generation unit which generates information about the regenerated device address of the apparatus; and a device information update unit which updates device information of the beacon group of the apparatus, when a beacon including information about a regenerated device address of the apparatus is received from another device included in the beacon group of the apparatus.

Abstract: A system and method are provided for performing a clear channel assessment (CCA) function in a wireless mesh network. In doing so, a method is provided for performing a CCA function to detect a hidden node in a wireless mesh network and includes varying a predetermined default threshold value according to at least one parameter, and determining a variable threshold value to perform the CCA function resulting from the varying of the predetermined default threshold value. The CCA function can then be performed based on the determined variable threshold value.

Abstract: A multi-channel media access control (MAC) method for Wireless Local Area Network (WLAN) devices with single radio interface is provided. The method includes starting a channel coordination window (CCW) that is repeated with a period P, allocating an arbitrary WLAN device pair on a common channel to a destination channel by using a channel utilization vector that indicates whether each of N channels is occupied or available during CCW, and switching the arbitrary WLAN device pair to the destination channel.

Abstract: A non-agile channelization method for multichannel medium access control (MAC) is provided, in which an available channel is categorized as an agile or non-agile channel, an operation mode of the channel categorized as the non-agile channel is selected, and multichannel switching is performed according to the selected operation mode. The non-agile channelization method for multichannel MAC enables non-agile channel switching to create a connected network, and allows agile and non-agile channel switching to coexist to avoid a change in existing hardware.