Patent application number | Description | Published |
20080218209 | Device for Controlling Terminal State, Method Thereof, and Device for Transmitting Paging Message - The present invention relates to a device for controlling a state of a terminal with respect to mobility management, and a method thereof. The state of the terminal includes a disconnected state and a connected state, the connected state includes an active state and an idle state, and the active state includes an active sub-state and a standby sub-state. The terminal in the active state updates location information for each cell, and the terminal in the idle state updates the location information for each radio access network registration area including a plurality of cells. The terminal in the active sub-state performs a handover when leaving a current cell. The terminal in the standby sub-state determines a quality of service (QoS) of packet data, and performs the handover or is set to be in the idle state according to the determined QoS. | 09-11-2008 |
20080232260 | Method for Requesting Resource and Scheduling for Uplink Traffic in Mobile Communication and Apparatus Thereof - The present invention relates to a resource allocation requesting method and a packet scheduling method for uplink packet traffic in a mobile communication system, and an apparatus of the packet scheduling method. For efficient scheduling for the uplink traffic, scheduling is performed according to characteristics of traffic between a base station and user equipment (UE). Particularly, when the traffic generates a variable size packet on a periodic basis, the traffic is classified into first traffic that generates a completely variable size packet on a periodic basis and second traffic that generates a quasi-variable size packet on a periodic basis. In addition, the UE requests resource allocation in a different form from the base station depending on the type of traffic, and the base station performs scheduling according to the resource allocation request. Therefore, the UE requests resource allocation in accordance with traffic characteristics and the base station performs scheduling according to the traffic characteristics so that optimal uplink scheduling can be performed. | 09-25-2008 |
20080259862 | Method for Scheduling in Mobile Communication and Apparatus Thereof - The present invention relates to a scheduling device and method of a mobile communication system. In the packet scheduling method, a base station performs packet scheduling for a terminal station in a mobile communication system, and a transport channel comprising an uplink shared channel (UL-SCH) and a physical channel comprising an uplink grant channel (UL-GCH) between the terminal and the base station are classified into a plurality of channels. In addition, in the packet scheduling method: a) the base station receives scheduling information from the terminal; b) the base station allocates an uplink resource for uplink traffic transmission for terminal based on the received scheduling information; and c) information for the allocated uplink resource is transmitted to the terminal through the UL-GCH of the physical channel. | 10-23-2008 |
20090213800 | Device and Method for Controlling State in Cellular System - A terminal state controlling method and apparatus are provided. The terminal state includes a connected state and an idle state, and the connected state includes an active state and a dormant state. The active state includes a scheduling-ON state and a scheduling-OFF state. In the state controlling apparatus, a radio resource control (RRC) layer controls a transition between the active state and the dormant state, and a media access control (MAC) layer controls a transition between the scheduling-ON state and the scheduling-OFF state. | 08-27-2009 |
20090232161 | HIERARCHICAL HEADER FORMAT AND DATA TRANSMISSION METHOD IN COMMUNICATION SYSTEM - In order to transmit data between layers in a communication system, and ARQ controller determines a transmission method of a service packet according to QoS of the service packet of an upper layer, determines a retransmission method of the service packet according to the transmission method, generates a fragmentation block by fragmentizing and concatenating the service packet according to a transmission amount of the service packet determined by the transmission method, generates a data packet including the fragmentation block and fragmentation block information, adds radio link control information including the retransmission method to the data packet to generate a radio link control data packet, and transmits the radio link control data packet to a MAC layer. | 09-17-2009 |
20090252124 | Method for requesting resource and scheduling for uplink traffic in mobile communication and apparatus thereof - The present invention relates to a resource request and a packet scheduling method for uplink traffic in a mobile communication system. For efficient scheduling of the uplink traffic, a base station and user equipment (UE) determines a scheduling method according to characteristics of the traffic when performing negotiation therebetween. The traffic may be classified into traffic that generating a fixed-size packet in a periodical time interval, traffic that generates a variable-size packet in a periodic time interval, and traffic that generates a variable-size packet in a random time interval. Therefore, the UE requests a resource in accordance with the characteristics of the traffic and the base station performs scheduling according to the characteristics of the traffic such that an optimal uplink packet scheduling can be achieved. | 10-08-2009 |
20100118804 | WIRELESS PACKET COMMUNICATION SYSTEM AND RESOURCE SCHEDULING METHOD THEREOF - According to the present invention, a wireless packet communication system having a protocol structure that can improve radio resource efficiency while reducing the amount of control information in packet transmission for radio resource allocation to a mobile station, and a radio resource allocation method of the system, is provided. | 05-13-2010 |
20100136987 | WIRELESS COMMUNICATION SYSTEM WITH PROTOCOL ARCHITECTURE FOR IMPROVING LATENCY - The present invention relates to a wireless communication system having protocol architecture for reducing latency of a cellular system. In the protocol architecture of the wireless communication system in the cellular system, a physical layer supports wireless transmission of the cellular system and estimates a radio channel condition. A data link layer determines a data transmission mode based on a QoS of user data and the radio channel condition estimated by the physical layer and performs segmentation and assembly of the packet data, and a network layer establishes and releases a radio bearer for transmitting packet data transmitted from the data link layer and a control command. A control service access point is provided for control information transmission between the data link layer and the physical layer. | 06-03-2010 |
20110074632 | WIRELESS POSITIONING METHOD AND APPARATUS - A wireless positioning method of a receiver is provided. Signals are received from a plurality of transmitters, propagation taps of the plurality of transmitters received from the plurality of transmitters are determined, respectively, the distance between the receiver and each of the transmitters is calculated, respectively, the weight of each of the transmitters is calculated by using each of the propagation delay tap, the distance is adjusted by using the weight of each of the transmitters, and an area, in which circles away by the adjusted distances between the receiver and each of the transmitters on the basis of each of the transmitters overlap with each other, is estimated as the location of the receiver. Thus, an error of wireless positioning according to a propagation environment can be reduced. | 03-31-2011 |
20110074634 | WIRELESS POSITIONING METHOD AND APPARATUS - A wireless positioning method of a receiver is provided. Signals are received from a plurality of transmitters, propagation taps of the plurality of transmitters received from the plurality of transmitters are determined, respectively, the distance between the receiver and each of the transmitters is calculated, respectively, the distances are corrected by using propagation delay taps of the respective transmitters to determine final distances between the receiver and each of the transmitters, and an area, in which circles away by the final distances between the receiver and each of the transmitters on the basis of the center of each of the transmitters overlap with each other, is estimated as the location of the receiver. Thus, an error of wireless positioning according to a propagation environment can be reduced. | 03-31-2011 |
20110074635 | METHOD AND APPARATUS FOR POSITIONING - Provides are method and apparatus for wireless positioning. An exemplary embodiment of the present invention provides a method for wireless positioning, which includes: receiving signals from a plurality of transmitters; determining propagation delay tabs of the plurality of transmitters, from the signals received from the plurality of transmitters, respectively; setting the order of the plurality of transmitters in accordance with the propagation delay tabs; measuring distances between a receiver and the transmitter, respectively; and estimating the position of the receiver, by using the order and the measured distance. | 03-31-2011 |
20110090810 | METHOD FOR AQUIRING PROCESSING TIME OF WIRELESS SIGNAL - A base station resets a wireless signal processing time depending on the processing capability of a terminal, and determines the transmission position of a feedback signal for a data packet using the reset wireless signal processing time and transmits the same to the terminal. If the feedback signal indicates the success of reception of the data packet, the data packet can be processed using the reset wireless signal processing time, and the wireless signal processing time can be reset to a smaller value. | 04-21-2011 |
20110171993 | WIRELESS POSITIONING METHOD, WIRELESS POSITIONING APPARATUS, AND MOBILE STATION - A wireless positioning apparatus receives a plurality of channel responses for a plurality of locations, generates a plurality of channel response patterns from the plurality of channel responses, and stores the plurality of channel response patterns. The wireless positioning apparatus receives an estimated channel response from a mobile station and compares the estimated channel response with the plurality of channel response patterns to estimate a location of the mobile station. The wireless positioning apparatus provides the estimated location information to the mobile station. | 07-14-2011 |
20110183689 | APPARATUS AND METHOD FOR DETERMINING POSITION - Provided is a wireless position determining method and apparatus. The wireless position determining includes: a measuring unit that measures a propagation delay tap of a signal received from a transmitting end through a channel; and extractor that extracts delay spread information having various forms based on the propagation delay tap; and an obtaining and calculating unit that obtains a distance between transmission and reception ends based on the delay spread information and calculates a position of a receiving end based on the obtained distance between the transmission and reception ends. | 07-28-2011 |
20120184297 | WIRELESS LOCATION MEASUREMENT METHOD - A method for a receiving node to find a distance from a transmitting node and measure a location includes: measuring a delay tab by receiving a location measurement signal from the transmitting node, temporarily determining a distance between the receiving node and the transmitting node by using the delay tab to compare it with a reference distance, selecting one of a distance estimation method using propagation delay and a distance estimation method using delay spread, and estimating a final distance. | 07-19-2012 |
20120190383 | LOCATION MEASUREMENT METHOD - In a method for a terminal to measure a location by using a public safety monitoring system, when a public safety mode available for tracking a location while a terminal is turned off is set, the terminal acquires location measurement information and transmits it to the public safety monitoring system. In a method for measuring a location of a terminal to which plural stages of public safety modes are set, when a stage for performing a location measurement process is set, the terminal acquires location measurement information, transmits location measurement information to the public safety monitoring system, and enters the next stage when the public safety mode is not cancelled after a predetermined time. In a method for measuring a location of a terminal in a public safety monitoring system, a public safety mode setting request message including control information is transmitted to the terminal to which a public safety mode setting is requested, location measurement information is received from the terminal, and the location of the terminal is tracked. | 07-26-2012 |
20130223244 | METHOD AND APPARATUS FOR DETERMINING NUMBER OF IDLE STATE TERMINALS AND METHOD FOR CONTROLLING DATA TRANSMISSION USING THE SAME - Disclosed are a method and apparatus for determining the number of idle state terminals that determines the number of terminals in an idle state and controls data transmission for a multicast or broadcast service (MBS), and a method of controlling data transmission. The method of determining the number of idle state terminals in the MBS according to the present invention includes: transmitting, by a transmitter, a base station signal for verifying the number of idle state terminals; determining whether a radio terminal signal transmitted from an idle state terminal using the base station signal is present, or a the number of radio terminal signal types; and determining the number of idle state terminals based on whether the radio terminal signal is present or the number of radio terminal signal types. | 08-29-2013 |
20130288705 | WIRELESS LOCATION DETERMINATION APPARATUS AND METHOD USING WEIGHTED VALUE IN WIRELESS COMMUNICATION NETWORK - Disclosed is a wireless location determination apparatus using weighted values in a wireless communication network, including: a fixed infrastructure searching unit configured to search and accept information of nodes to be located and neighbor fixed infrastructures; an infrastructure combination generating unit configured to generate fixed infrastructure combinations to be used for location determination from the information of the fixed infrastructures; a location determination information element extracting unit configured to extract location determination information elements between the fixed infrastructures from each generated fixed infrastructure combination; a weighted value calculating unit configured to allocate the weighted values to each fixed infrastructure combination using the extracted location determination information elements; a fixed infrastructure combination selecting unit configured to select the fixed infrastructure combinations for location determination using the allocated weighted values; and a location calculating unit configured to calculate locations of the nodes to be located using the selected fixed infrastructure combinations. | 10-31-2013 |
20140336850 | DEDICATED CHANNEL ESTABLISHMENT METHOD FOR HIGH SPEED DATA TRANSMISSION IN RAILWAY WIRELESS SENSOR NETWORK - Disclosed is a railway wireless sensor network system. The railway wireless sensor network system includes a plurality of sensors which are included in a railway vehicle and measure an operation state of the railway vehicle in real time, a plurality of routers which receive information on the measured operation state through a dedicated channel with each sensor, and a gateway which receives information on the operation state through a dedicated channel between the routers, and periodically transmits information on the received operation state to a railway vehicle control center. | 11-13-2014 |