Abstract: Provided are an infrastructure apparatus and method of providing collaboration between thing devices. Since a plurality of thing devices located in a specific space share an experience where the plurality of thing devices have performed a collaboration service, each of the thing devices may search for peripheral thing devices for performing the collaboration service without intervention of a center server and may generate a collaboration group including the found thing devices, and tasks for performing through negotiation may be autonomously distributed to the thing devices included in the collaboration group, thereby providing autonomous collaboration between the thing devices.

Abstract: A method and an apparatus for communication between peer devices in which a cyclic-superframe including a plurality of superframes is used are provided. The method may include: receiving a discovery request command frame including information about a first cyclic-superframe for a peering period at an active contention access period (CAP) of the plurality of superframes; transmitting, to a peer device that has transmitted the discovery request command frame, a discovery response command frame corresponding to the discovery request command frame; and performing the peering period with the peer device based on the first cyclic-superframe.

Abstract: Provided is a personal content providing system for providing customized content according to a personalization context. The personal content providing system includes a context reader configured to receive a context beacon including the personalization context from one or more of a context terminal and a context tag, a content generation device configured to generate personal content, based on the personalization context, a content service device including a content output device that outputs the generated personal content, a local space switch configured to connect the context terminal, the context tag, the context reader, and the content service device which are disposed in a predetermined local space, and an infrastructure management device configured to manage the context terminal, the context tag, the context reader, and the content service device which are disposed in the predetermined local space.

Abstract: A method and an apparatus for communication between peer devices in which a cyclic-superframe including a plurality of superframes is used are provided. The method may include: receiving a discovery request command frame including information about a first cyclic-superframe for a peering period at an active contention access period (CAP) of the plurality of superframes; transmitting, to a peer device that has transmitted the discovery request command frame, a discovery response command frame corresponding to the discovery request command frame; and performing the peering period with the peer device based on the first cyclic-superframe.

Abstract: Provided are an infrastructure apparatus and method of providing collaboration between thing devices. Since a plurality of thing devices located in a specific space share an experience where the plurality of thing devices have performed a collaboration service, each of the thing devices may search for peripheral thing devices for performing the collaboration service without intervention of a center server and may generate a collaboration group including the found thing devices, and tasks for performing through negotiation may be autonomously distributed to the thing devices included in the collaboration group, thereby providing autonomous collaboration between the thing devices.

Abstract: Disclosed herein is a routing apparatus and method for configuring a LPWMN based on a channel hopping time-multiplexed wireless link. The routing apparatus of the present invention includes a control unit for setting up a channel hopping time-multiplexed wireless link with a gateway router, one or more routers, and one or more devices based on deterministic and synchronous multi-channel extension (DSME) media access control (MAC) link control (DSME MAC link control: DLC) sublayers and DSME MAC link network (DLN) sublayers. A communication unit transfers data frames to the gateway router, routers, and devices depending on connection quality of the channel hopping time-multiplexed wireless link.

Abstract: Provided is a personal content providing system for providing customized content according to a personalization context. The personal content providing system includes a context reader configured to receive a context beacon including the personalization context from one or more of a context terminal and a context tag, a content generation device configured to generate personal content, based on the personalization context, a content service device including a content output device that outputs the generated personal content, a local space switch configured to connect the context terminal, the context tag, the context reader, and the content service device which are disposed in a predetermined local space, and an infrastructure management device configured to manage the context terminal, the context tag, the context reader, and the content service device which are disposed in the predetermined local space.

Abstract: A sensor network includes: a network coordinator that broadcasts a first beacon frame; a sensor device that receives a frame from the network coordinator or transmits a frame to the network coordinator; and at least one repeater that relays the frame of the network coordinator to the sensor device or relays the frame of the sensor device to the network coordinator and that broadcasts a second beacon frame that is synchronized with the first beacon frame, wherein the sensor device is synchronized with the second beacon frame to transmit/receive the frame, the cyclic-superframe includes a plurality of slotted-superframes corresponding to the first beacon frame and the second beacon frame, and the network coordinator, the sensor device, and the repeater operate in a periodically repeated cyclic-superframe structure.

Abstract: The present invention provides a time synchronization method in a low energy critical infrastructure monitoring network and a coordinate access method using a superframe. According to the exemplary embodiments of the present invention, time synchronization can be promptly and efficiently performed in the low energy critical infrastructure monitoring network, a link access method with three grades of link access can be provided, and a frame structure and a process for link generation, link management, and extended connection are provided.

Abstract: Disclosed herein are provided a routing device and method for configuring a Low Power Wireless Mesh Network (LPWMN) including a channel hopping time multiplexing wireless link. The routing device includes a control unit and a communication unit. The control unit sets up a virtual link, a shared link, or a dedicated link to an external device or router. The communication unit forwards a data frame to the device or router based on the set-up link.

Abstract: A super frame structure supporting a mesh network, and a beacon scheduling method. The super frame structure and the beacon scheduling method may support a mesh topology in a beacon enabled mode, may have an algorithm that is simple and easily realized via beacon scheduling using a distribution method, and may easily adapt to changes in a network environment.

Abstract: Disclosed herein is a routing apparatus and method for configuring a LPWMN based on a channel hopping time-multiplexed wireless link. The routing apparatus of the present invention includes a control unit for setting up a channel hopping time-multiplexed wireless link with a gateway router, one or more routers, and one or more devices based on deterministic and synchronous multi-channel extension (DSME) media access control (MAC) link control (DSME MAC link control: DLC) sublayers and DSME MAC link network (DLN) sublayers. A communication unit transfers data frames to the gateway router, routers, and devices depending on connection quality of the channel hopping time-multiplexed wireless link.

Abstract: A method in which a peer generates a peer service group includes: determining whether a first peer service group that provides a peer service requested from user exists in the vicinity; participating, if the first peer service group exists, in the first peer service group; and generating, if the first peer service group does not exist, a second peer service group that provides the peer service, and a method of accessing a link resource that accesses a group link, a guest link, a relay link, a group link, and a idle link of a peer service group are provided.

Abstract: A method of operating a device capable of periodically hopping a predetermined interval using a channel hopping sequence in order to improve low radio frequency (RF) reliability caused by single frequency based channel access.

Abstract: Disclosed herein are provided a routing device and method for configuring a Low Power Wireless Mesh Network (LPWMN) including a channel hopping time multiplexing wireless link. The routing device includes a control unit and a communication unit. The control unit sets up a virtual link, a shared link, or a dedicated link to an external device or router. The communication unit forwards a data frame to the device or router based on the set-up link.

Abstract: A constant amplitude decoding apparatus and method for multiplexed direct-sequence spread spectrum communication system are provided. The constant amplitude decoding apparatus includes: a despreading and demultiplexing module receiving a data stream of a constant amplitude and despreading and demultiplexing the received data stream to restore it to a 2D signal; a decoding module first performing a vertical decoding on the 2D signal and then performing horizontal decoding thereon; a control module determining whether to repeatedly perform vertical decoding and horizontal decoding; and a bit stream information output module outputting the decoding results from the decoding module as a bit stream.

Abstract: A medium access control (MAC) technique of a multihop sensor network. In the multihop sensor network, the MAC technique may contribute to significantly reducing transmission delay, and allow real-time services to be provided to all nodes by extending a guaranteed time slot (GTS) restricted to one hop in a personal area network (PAN) coordinator (PNC) to all nodes. Furthermore, the MAC technique may allow the number of available GTSs to be significantly increased, by using all 16 frequency band channels instead of using only a single frequency band and setting a multi-superframe.

Abstract: Provided are a sensor node included in a sensor network, an update server updating the sensor node, and a method of updating a sensor node. The update server updating a sensor node included in a sensor network includes an execution code manager managing execution codes for a plurality of sensor nodes included in the sensor network, a rule generator generating an update rule based on a result of comparing an existing execution code managed by the execution code manager with an update execution code required for a new function update of the sensor node, and a downloader causing the sensor node to download the update rule generated by the rule generator. Accordingly, an execution code can be updated by a small amount of data transmission.

Abstract: There is provided a mesh routing method in beacon-enabled wireless AD-HOC networks that includes: broadcasting, by nodes constituting a wireless AD-HOC network, a beacon message loading neighbor node information on a beacon payload; managing, by a node receiving the broadcasted beacon message, its own neighbor node table by extracting the neighbor node information loaded on the beacon payload; and performing, by a source node attempting to transmit data or commands, mesh routing on the basis of its own neighbor node table.

Abstract: A hybrid virtual multiple-input multiple-output (V-MIMO) transmission method of a management node in a wireless ad-hoc network in which a transmission path from a source node to a destination node is divided into one or more sections is provided. The hybrid V-MIMO transmission method includes obtaining one or more pieces of node information of one or more nodes by transmitting an information request message to the nodes in response to a transmission request message for data transmission from the source node to the destination node; setting a shortest path (SP) from the source node to the destination node based on the obtained node information; determining transmission schemes individually for nodes present on the SP; issuing a transmission preparation request by transmitting the determined transmission schemes to the respective corresponding nodes; and transmitting a transmission start message to the source node in response to transmission ready responses from the respective nodes.