| Patent application number | Description | Published |
|---|
| 20080212477 | APPARATUS AND METHOD FOR TRANSMITTING DATA USING MULTI-ROUND CONTENTION AVOIDANCE - An apparatus and method for transmitting data by using Multi-round Contention Avoidance (MrCA) are provided. The method includes initializing a contention window for each of a plurality of contention rounds and setting a backoff counter corresponding to a size of the contention window for each contention round, starting from a first contention round to a last contention round, decrementing a backoff counter of a corresponding contention round in a time slot unit and transmitting data when the decremented backoff counter is zero and when the corresponding contention round is a last contention round. Accordingly, the number of contending nodes is exponentially decreased for each contention round, resulting in significant decrease in a collision probability in addition to improving fairness on channel use among users. | 09-04-2008 |
| 20080247412 | Hybrid channel assignment method and router thereof - A hybrid channel assignment method comprising the steps of negotiating among routers to select one router to act as a central server; collecting, at the selected router, information on an entire network transmitted from the other routers, and assigning channels based upon the information on the entire network; and reassigning channels of respective routers based upon dynamically-changing traffic characteristics. The hybrid channel assignment method can assign channels using both centralized processing and distributed processing in order to ensure optimally correct channel assignment consistent with present traffic characteristics. This as a result can prevent network resources from being wasted and also increase network capacity, thereby optimizing effective use of the network resources. | 10-09-2008 |
| 20080253569 | System and method for performing authentication in a wireless mobile communication system - A system and method for authentication in a wireless mobile communication system are provided, in which a mobile station calculates a CMAC value having a first number of bits, transmits to a base station a ranging request message including a partial CMAC value being a second number of upper bits of the CMAC value having the first number of bits, and receives a ranging response message indicating whether authentication is successful or failed from the base station. | 10-16-2008 |
| 20100271973 | SYSTEM AND METHOD FOR ESTIMATING FLOW-SPECIFIC TRAFFIC VOLUMES - A system and method for exactly estimating a volume of traffic is provided when packets are transferred within the network. The system and method receive data packets from clients through a plurality of router-for-clients, and creating a flow information packet for estimating information about a flow, transfer the data packets and the created flow information packet to the destination router-for-client via a router-for-relay, calculate information about the traffic of a flow at the destination router-for-client through the flow information packets transferred from the router-for-clients, and estimate a volume of the traffic. Thus, the system and method can estimate the volume of the traffic on the network with respect to the aggregated flow defined by the router pair connected to the terminal or the external network when the traffic is actually introduced into the network, instead of the flows of each terminal and each destination. | 10-28-2010 |
| 20100290379 | METHOD FOR WIRELESS MULTI-HOP NETWORK - Technology for a wireless multi-hop network is disclosed. a plurality of nodes in the wireless multi-hop network are synchronized to a period sequentially including a first interval and a second interval and are in an active state at the start time of the first interval. a node transmits a control frame at the start time of the first interval, the control frame indicating that data will be transmitted in the second interval, and then transitions to a sleep state which is maintained until a wake-up time in response to determining that the control frame has been successfully received by a next hop node. The wake-up time is a point in time when a node transitions to an active state to transmit the data and is present in the second interval. | 11-18-2010 |
| 20110058504 | SCHEDULING METHOD, MS APPARATUS USING THE SCHEDULING METHOD, DATA TRANSMISSION METHOD, AND BS APPARATUS USING THE DATA TRANSMISSION METHOD IN WIRELESS COMMUNICATION SYSTEM - In the MS apparatus for performing scheduling, a reception module receives any number information through a specific downlink channel in a first time unit from each of neighbor BSs. A scheduling module determines, among the neighbor BSs, a BS which is to transmit and receive data using a downlink data transmission region and an uplink data reception region, respectively, in a second time unit according to a previously set rule based on the number information. A transmission module transmits a signal, indicating that data transmission and reception using the downlink transmission region and uplink data reception region, respectively, in the second time unit are not possible, to the other neighbor BSs excluding the determined BS among the neighbor BSs. | 03-10-2011 |
