Patent application number | Description | Published |
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 |
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 |
20120093099 | METHOD AND APPARATUS USING FRAME STRUCTURE FOR WIRELESS MESH NETWORKS - Provided is a frame structure designed for distributed access control and OFDMA transmission in a wireless mesh network. Also, a communication method and a network node based on the frame structure are provided. Mesh nodes included in the wireless mesh network may use the frame structure and thus, may have a high prospect of transmitting a network configuration information message and scheduling information for obtaining a resource. Also, a scheduling process of the mesh nodes may be completed within a short period based on the frame structure. | 04-19-2012 |
20120155304 | METHOD AND APPARATUS FOR ACCESS CONTROL IN WIRELESS COMMUNICATION SYSTEM - In an orthogonal frequency division multiple access (OFDMA)-based wireless mesh network, a communication node receives information regarding a next transmission time of a 1-hop node and a 2-top node through the 1-hop node, calculates next transmission intervals of the 1-hop node and the 2-hop node, determines a next transmission time of the communication node by using the next transmission intervals of the 1-hop node and the 2-hop node, and then transmits, to an 1-hop node of the communication node, the information of the next transmission time together with the information of the transmission time of the 1-hop node, received from the 1-hop node. | 06-21-2012 |
20120163171 | ROUTING METHOD AND APPARATUS FOR SUPPORTING QoS IN WIRELESS NETWORK - A method for routing and setting up a connection to provide Quality of Service (QoS) required in a wireless network is provided, which allows to use a path capable of providing QoS higher than a certain level between a source node and a destination node. A routing apparatus includes: a connection management unit that receives a connection setup request directed to a destination node, determines a predicted path leading to the destination node and the next node, and transmits a connection setup request to the next node; a resource allocation unit that allocates resources so as to satisfy required QoS; a routing unit that measures available QoS information of a link and enables the exchange of information of the link including the QoS information with the nodes of the network; and a routing information management unit that stores received routing information. | 06-28-2012 |
20120163233 | METHOD FOR TRANSMITTING ROUTING INFORMATION AND ROUTING APPARATUS IN WIRELESS NETWORK - The present invention relates to a method for transmitting routing information in a wireless network. More particularly, the present invention relates to a method for forwarding node link information even in an environment having a limited bandwidth for transmitting routing information. A routing apparatus according to exemplary embodiment of the present invention stores network topology information in an link information unit, generates a routing update message according to a priority of each link information, and transmitting the routing update message to a network. The priority of each link information is decided based on change in network topology, and a reception time and a transmission time of link information. Accordingly, important link information can be propagated at fast speed. | 06-28-2012 |
20130065634 | METHOD FOR COMMUNICATION OF TERMINAL AND METHOD FOR COMMUNICATION OF BASE STATION - A method for communication of a terminal and a method for communication of a base station are disclosed. Communication between a first base station with a problem in a backbone and a second base station located beyond the coverage of the degraded base station and neighboring the first base station is relayed by a terminal. Accordingly, the first base station is able to continuously provide service to subordinate stations. | 03-14-2013 |
20130148595 | METHOD AND APPARATUS FOR MANAGING WIRELESS NETWORK - If a target node that enters into a transmission range is sensed, a mesh node of a wireless communication system selects an agent node having itself and a target node as a neighboring node among a plurality of neighboring nodes to form a link with the target node through the agent node. Also, the mesh node deletes the formed link if a target node that is out of a transmission range among a plurality of neighboring nodes is sensed, and forms a substitution path for at least a portion among an entire path of a connection including the deleted link. | 06-13-2013 |
20130265898 | APPARATUS AND METHOD FOR ALLOCATING RESOURCE FOR AVOIDING INTERFERENCE OF WIRELESS COMMUNICATION SYSTEM - In a wireless communication system, a transmitting node selects a simultaneously transmit-unavailable node of a 1-hop node of the transmitting node, and allocates a transmitting resource in transmissible resources, except for a transmission scheduled resource of a simultaneously transmit-unavailable node. Further, a receiving node selects a simultaneously receive-unavailable node of a 1-hop node, which is a transmission target of the receiving node selects a simultaneously transmit-unavailable node of a 1-hop node of the receiving node, and allocates a receiving resource in receivable resources, except for a transmission scheduled resource to a simultaneously transmit-unavailable node of a simultaneously receive-unavailable node of the 1-hop node, which is a transmission target of the receiving node. | 10-10-2013 |
20140013117 | AUTHENTICATION METHOD OF WIRELESS MESH NETWORK - Disclosed is an authentication method of a wireless mesh network capable of reducing overload and communication delay during authentication procedure by performing authentication between nodes without accessing an authentication server. The authentication method of a wireless mesh network according to an exemplary embodiment of the present disclosure includes: selecting, by a new node, a first neighbor node among one or more adjacent nodes; transmitting, by the new node, an authentication request message including a public key of the new node; authenticating, by the first neighbor node, the public key of the new node; transmitting, by the first neighbor node, an authentication response message including a public key of the first neighbor node to the new node; and authenticating, by the new node, the public key of the first neighbor node; transmitting, by the new node, an authentication identification message to the first neighbor node. | 01-09-2014 |
20140016551 | METHOD AND APPARATUS FOR IDENTIFYING COMMUNICATION LINKS, AND COMMUNICATION METHOD - A communication method for a third device that controls a first link established directly between a first device and a second device is provided. The third device allocates a first link identifier for identifying the first link. The third device transmits first information including the first link identifier to the first device and the second device. The third device receives, from the first device and the second device, second information including allocation acceptance information indicating the acceptance or rejection of allocation of the first link identifier. | 01-16-2014 |
20140024384 | COMMUNICATION METHOD OF TERMINAL AND COMMUNICATION METHOD OF BASE STATION FOR DIRECT COMMUNICATION LINK BETWEEN TERMINALS - A communication method of a terminal and a communication method of a base station for a direct communication link between terminals are disclosed. A base station schedules a reference terminal to transmit a ranging code, and schedules target terminals to receive the ranging code. The reference terminal measures the ranging code received from the target terminals, and transmits a ranging code measurement result to the base station. The base station selects a terminal from among the target terminals to form the direct communication link with the reference terminal among the target terminals based on the ranging code measurement result. | 01-23-2014 |
20140140286 | METHOD OF DIRECT COMMUNICATION BY TERMINAL - A method for a first terminal communicating with a base station to perform direct communication with a second terminal is provided. The first terminal determines first timing for transmitting or receiving a first signal to or from the base station. Next, the first terminal determines second timing for transmitting a second signal for terminal discovery to the second terminal. When the first timing and the second timing overlap, the first terminal then changes either the first timing or the second timing. | 05-22-2014 |
20140146728 | METHOD AND APPARATUS FOR MANAGING LOW-DUTY MODE OPERATION - A method of managing a low-duty mode operation is provided by a small base station. The small base station determines a low-duty cycle pattern in which an available interval for data traffic transmission on active air interface and an unavailable interval for transmitting no data traffic are repeated, and provides a terminal with low-duty cycle pattern information. The low-duty cycle pattern information includes a length of the available interval and a start offset indicating a wireless frame at which the low-duty cycle pattern starts. | 05-29-2014 |
20140293828 | METHOD AND APPARATUS FOR MANAGING SYNCHRONIZATION GROUPS IN WIRELESS COMMUNICATION SYSTEM - A synchronization group management apparatus of a node recognizes a node belonging to a different group if groups having mobility are moved and located in the same area, and performs an operation of merging the different groups into one group by changing the frame start time and the synchronization reference time of the node. | 10-02-2014 |
20150080004 | METHOD AND APPARATUS FOR BEAMFORMING IN WIRELESS COMMUNICATION SYSTEM - A beamforming apparatus and method for expanding coverage of a control channel are provided, by which neighboring communication devices are classified according to the number of beams that they can receive, and therefore the frequency or period of beam transmission is adjusted to transmit a control channel by a beamforming method. Hence, an overhead reduction and an increase in transmission rate can be achieved, and coverage holes can be prevented. | 03-19-2015 |