Patent application number | Description | Published |
20100268825 | SCHEDULING METHOD AND SCHEDULING INFORMATION SYNCHRONIZING METHOD IN WIRELESS AD HOC NETWORK - A decentralized scheduling method in a wireless ad hoc network is provided which includes grouping nodes in the network cluster by cluster, determining a cluster head of each cluster, and sequentially performing scheduling cluster by cluster. Accordingly, it is possible to provide an efficient cluster-based scheduling method which is quickly adapt to changes and reduces power consumption. | 10-21-2010 |
20100278156 | DATA COMMUNICATION METHOD USING BODY AREA NETWORK SUPERFRAME - There is provided a data communication method using a body area network superframe including an advertisement period, a contention medium access period, a beacon period, and a data transmit period, the data communication method including: broadcasting, by a coordinator node, predetermined information during the advertisement period; transmitting, by nodes, which wish to transmit data, the data only when carrier is not in use as a result of sensing the carrier after the contention medium access period is initiated and a predetermined backoff time elapses; broadcasting, by each of the nodes, periodic beacon signals during the beacon period; and transmitting, by each of the nodes, continuous data and periodic data during the data transmit period | 11-04-2010 |
20100284334 | ASYNCHRONOUS MULTI-CHANNEL ADAPTATION METHOD FOR WIRELESS AD-HOC NETWORK - There is provided an asynchronous multi-channel adaptation method. An asynchronous multi-channel adaptation method according to an aspect of the invention may include: a channel scanning operation in which a new node, participating in a wireless ad-hoc network, scans channels and selects a receiving channel thereof; and a receiving channel information transmission operation in which the new node transmits information on the selected receiving channel thereof to a neighboring node. | 11-11-2010 |
20100322289 | CONSTANT AMPLITUDE ENCODING APPARATUS AND METHOD FOR CODE DIVISION MULTIPLEXING COMMUNICATION SYSTEM - Disclosed are an apparatus and method for constant amplitude encoding of a transmission signal in a CDM (Code Division Multiplexing) communication system. The apparatus for constant amplitude encoding of a transmission signal includes: an encoding module sequentially performing horizontal encoding and vertical encoding on an input signal; and a spreading and multiplexing module spreading the signal which has been encoded by the encoding module and multiplexing the spread signal in a vertical direction to output a data stream having a constant amplitude. | 12-23-2010 |
20110151793 | ADAPTIVE COLLISION AVOIDANCE APPARATUS AND METHOD IN CHANNEL-HOPPING BASED WIRELESS AD-HOC NETWORKS - There are provided an adaptive collision avoidance apparatus and a method in a channel-hopping based wireless AD-HOC networks. The adaptive collision avoidance apparatus is configured to include a channel quality measuring unit that measures the quality of each channel by using receiving frames; an unavailable channel classifying unit that classifies unavailable channels not to perform communications in the future based on information on the quality of each channel; an unavailable channel propagating unit that transfers a list of unavailable channels classified as unavailable channels to adjacent nodes; and a transceiver that transmits and receives frames through channels not classified as the unavailable channels. | 06-23-2011 |
20120014414 | APPARATUS AND METHOD FOR MANAGING CHANNEL RESOURCE IN BEACON-ENABLED WIRELESS PERSONAL AREA NETWORK (WPAN) - Provided are a node device of a beacon-enabled Wireless Personal Area Network (WPAN) managing a channel resource and a method thereof. The node device may generate a pseudo random binary sequence (PRBS) and generate a hopping sequence based on a number of available channels using the PRBS, thereby generating a hopping sequence having a characteristic of pseudo randomness and selecting a channel to be hopped, using the hopping sequence. | 01-19-2012 |
20120069869 | OPERATING METHOD FOR A WPAN DEVICE - 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. | 03-22-2012 |
20120093056 | APPARATUS AND METHOD FOR MANAGING SLOT - A slot managing method and apparatus is provided. A first layer of a destination node receives a request command for requesting a slot management from a source node, and transfers a first primitive for reporting a receipt of the request command to a second layer that is an upper layer of the first layer. The second layer transfers a second primitive to the first layer as a response to the slot management request. The first layer broadcasts a reply command including a result of the slot management request to neighboring nodes in response to the second primitive. The source node broadcasts a notify command including a result of the slot management request. | 04-19-2012 |
20120099575 | APPARATUS AND METHOD FOR COMPLEX COMMUNICATION - A complex communication apparatus transmits/receives voice information with other complex communication apparatuses through a set voice channel. The complex communication apparatus broadcasts a signaling packet expressing a destination identifier representing a desired communication type of one-to-one communication, group communication, and broadcast communication with other complex communication apparatuses and information of the set voice channel and performs voice communication with a complex communication apparatus corresponding to a destination identifier of other complex communication apparatuses, having received the signaling packet. | 04-26-2012 |
20120155326 | WIRELESS SENSOR NETWORK SYSTEM AND COMMUNICATION METHOD THEREOF - In a wireless sensor network system including at least one sensor network, when a network message received from a sensor node of a sensor network corresponds to a predetermined service, the wireless sensor network system forms a wireless local area network (WLAN) overlay network which is based on a WLAN system within a service area at which the sensor node is located. Data corresponding to the predetermined service is transmitted and received through the WLAN overlay network. | 06-21-2012 |
20130094481 | APPARATUS AND METHOD FOR MANAGING CHANNEL RESOURCE - An apparatus for managing a channel resource by a node sets a channel hopping sequence and a channel hopping offset value which are to be used, divides an assigned time slot into a plurality of subslots, divides a data frame for transmission into a plurality of subframes, and selects a channel for transmitting the plurality of subframes in the plurality of subslots, respectively, by channel hopping based on the channel hopping sequence, the channel hopping offset value, the index of the time slot, and the index of a subslot for transmitting a subframe. | 04-18-2013 |
20130156084 | RECTIFIER, RECEIVED SIGNAL STRENGTH INDICATOR, AND RECEIVER - A received signal strength indicator is provided. The received signal strength indicator includes a plurality of differential amplifiers forming an amplifier chain for amplifying differential signals and a plurality of rectifiers for rectifying signals output from the plurality of differential amplifiers and the differential signals, and a low pass filter for combining the signals rectified by the plurality of rectifiers to output received signal strength. Each rectifier includes a class AB voltage-current converter for converting a differential voltage into a current, and two triode transistors. | 06-20-2013 |
20140133473 | APPARATUS AND METHOD FOR MANAGING SLOT - An end device transmits a request command for requesting a slot management to a coordinator, and receives a reply command including a result of the slot management request from the coordinator. Each of the request command and the reply command includes an allocation order for indicating a slot allocation interval request. | 05-15-2014 |
20140153551 | APPARATUS AND METHOD FOR ALLOCATING RESOURCE FOR MEDIA ACCESS CONTROL - A method and apparatus for allocating a management resource of a channel of a node that is included in a wireless personal area network (WPAN) are provided. A resource of a channel performs communication with a specific node using a multi-superframe including a plurality of superframes, limits a position area of a time slot including a channel that is allocated to communication with a specific node to a predetermined superframe of the plurality of superframes, gives a logical connection ID to the time slot, and is allocated by matching the logical connection ID and a management resource that manages the time slot. | 06-05-2014 |
20140153587 | APPARATUS AND METHOD FOR ENCODING CONSTANT AMPLITUDE IN CODE DIVISION MULTIPLEXING COMMUNICATION SYSTEM - A method and apparatus for encoding a constant amplitude that is applied to a code division multiplexing communication system are provided. By dividing a data bit into a block unit, the receiving side can easily determine an error, and by reducing power consumption in outdoor wide area communication using a bit string of a small length in a basic unit of an input frame, efficiency can be improved, and thus a physical layer of a ubiquitous sensor network can be optimized. | 06-05-2014 |
20140286216 | WIRELESS COMMUNICATION DEVICE USING COMMON CONTROL CHANNEL AND WIRELESS COMMUNICATION METHOD USING THE SAME - A wireless communication method using a control channel between wireless communication devices including: exchanging profile information between a node and intermediate relay nodes therearound so as to allow the node to transmit/receive data to/from a destination node; determining, by the node, a first intermediate relay node using the profile information and determining a wireless communication mode with the first intermediate relay node; and transmitting/receiving data between the node and the first intermediate relay node by the determined wireless communication mode is provided. | 09-25-2014 |
20140341206 | METHOD FOR TIME SYNCHRONIZATION OF NODES IN PEER AWARE COMMUNICATION ENVIRONMENT - According to an exemplary embodiment of the present invention, a method for time synchronization of a first node in a peer aware communication (PAC) environment is provided. The first node obtains medium access control authority by performing contention with a second node neighboring the first node. The first node adds a time synchronization offset to the first beacon frame. In addition, the first node transmits the first beacon frame in a beacon period of a superframe when obtaining the media access control authority. | 11-20-2014 |
20150019718 | METHOD FOR SERVICE DISCOVERY IN WIRELESS PERSONAL AREA NETWORK - Disclosed are methods for service discovery in a wireless personal area communication network. A method for service discovery, performed in a terminal, the method comprises performing a passive scan for searching a specific service based on whether to receive a frame including a specific service identifier; and, when it fails to search the specific service, performing an active scan which broadcasts a service discovery request command frame for searching the specific service. Thus, service discovery may be efficiently performed by reducing the operation complexity of the terminal and minimizing the power consumption of the terminal needed for service discovery, without support of a upper layer. | 01-15-2015 |
20150036675 | METHOD AND APPARATUS FOR PROCESSING PACKET IN MULTI-CHANNEL WIRELESS NETWORK - A multi-channel wireless network acquires reference time information that is commonly applied to all multi-channels and acquires packet receiving time information of a received packet on each channel basis based on the reference time information by spreading and applying the reference time information to each channel. | 02-05-2015 |