Electronics and Telecommunications Research Institute

Dae-Geun Park

Bhum-Cheol Lee

Young-Il Kim

Sun-Sim Chun

Seung-Woo Lee

Won Geun Ryu

Yong-Su Lee

Sung-Hee Kim

Cheol-Hye Cho

Young-Soo Park

Yeon-Joon Chung

Han-Nah Kim

Jung-Hee Lee

Hyun-Yong Hwang

Jong-Moo Sohn

Young-Ho Park

Kyung-pyo Jun

Young-sun Kim

Ick-Sung Choi

Jeong-Hee Lee

Hyoung-Il Lee

The present invention relates to a system and a method for a mobile broadcast service, a controller, and a method for driving the controller. The system for a mobile broadcast service forms an MBS zone only with base stations having user demand for an MBS. For example, when there is a request for an MBS from a base station, if an MBS zone already exists which is providing the requested MBS, then the corresponding base station is included in the previously generated MBS zone. In contrast, if there are no more users using an MBS via a base station that is part of an MBS zone, then the base station in question is excluded from the MBS zone. Thus, an MBS zone can be dynamically formed by including or excluding a base station, forming an MBS zone, on the basis of an existence of an MBS user.

System and method for mobile broadcast service, controller and method for driving controller

Provided are a method and apparatus for configuring a Multicast and Broadcast Service (MBS) zone dynamically in a mobile communication environment. According to an example, there is provided a method of seamlessly changing base stations configuring a MBS zone whenever one or more mobile terminals configuring the MBS zone move or whenever a predetermined time period has elapsed to thereby provide a MBS with excellent quality while saving radio resources.

Method and apparatus for dynamically configuring multicast and broadcast service (MBS) zone in wireless communication system

Provided are an apparatus and method for providing a multicast and broadcast service (MBS) in a mobile communication environment. The method includes setting an MBS zone to be provided with content and include at least one member base station, configuring the MBS zone by classifying the at least one member base station belonging to the MBS zone into active members that simultaneously transmit MBS traffic and an MBS control parameter and inactive members that transmit only the MBS control parameter according to a predefined rule, and connecting a data delivery path through the active member to transmit the MBS traffic to a terminal.

Apparatus and method for providing multicast and broadcast service in mobile communication environment

A technology is provided capable of improving the efficiency of an OFDM system by obtaining the performance in Bit Error Rate (BER) in a wireless communication using OFDM and determining the minimum FFT input bit that produces a SNR difference of 0.1 dB or below with respect to a theoretical BER graph at a desired performance.

Receiving apparatus and method for providing input bits of fast fourier transformer according to modulation

Provided are an apparatus and method for transmitting multi-carriers to provide a high-quality service to multicast-based service subscriber terminals. The method includes: mapping first data for providing the multicast service, and second data different from the first data, to different antennas; converting the first mapped data into a first Intermediate Frequency (IF) signal and the second mapped data into a second IF signal; converting the first IF signal into a first RF signal having a carrier frequency, and deciding a power intensity of the first RF signal so that the first RF signal is transmitted over the entire coverage region of the base station; and converting the second IF signal into a second RF signal having the other carrier frequency, and deciding a power intensity of the second RF signal so that the second RF signal is transmitted over a predetermined region around the base station.

Multi-carrier transmitting apparatus and method for multicast service

An apparatus for providing identical broadcasting contents to wireless communication access networks using different wireless access technologies includes: a broadcasting service request processing device configured to receive a broadcasting service initiation request from a subscriber terminal and feed back an authentication result regarding a requested service; a subscriber authentication processing interface device configured to perform an authentication function regarding a broadcasting service requested by a subscriber through connection with an external authentication server; a contents broadcasting control device configured to identify a broadcasting service area based on the broadcasting service request of the subscriber terminal, when authentication has been normally finished, and broadcasting contents corresponding to the broadcasting service area and control transmission of the broadcasting contents using address information necessary to deliver the broadcasting contents; and a broadcasting service area configuration information storage device configured to store predetermined broadcasting service area information.

Method and apparatus for providing broadcasting service for different types of wireless communication systems

A technology of setting up a MBS zone for providing a mobile IPTV service is provided in which the MBS zone is effectively managed, so that QoS is prevented from being degraded due to the handover delay that is caused by a MBS handover occurring when a user moves between MBS zones.

Method of setting up dynamic multicast and broadcast service zone for providing mobile internet protocol television service

An efficient switching device and a method for fabricating the same using multiple shared memories are provided. The switching device includes: an output time determination unit to determine an output time to an output port; an output time administration unit to administer a possible data output time for each output port; a memory bank selection unit to select a memory bank with an empty data output time position; a memory bank utilization information administration unit to administer utilization information per output time; a connection unit to deliver transmission data to an output time position; a shared memory unit to store the data in the output time position, to administer dispersed shared memory banks according to an output time, and to read and output transmission data; and an output port connection unit receiving output data to read and transmit output port information of the data to a corresponding output port.

Efficient switching device and method for fabricating the same using multiple shared memories

Provided is an apparatus for changing Media Access Control (MAC) address, which is a conventional subscriber hardware identification address for identifying each subscriber, and a method thereof. The MAC address changing apparatus includes a frame receiving block for determining whether to change a source MAC address; a switch controlling block for controlling a switch; a change MAC address generating block for changing the source MAC address of the received frame; a change MAC address storing block for storing information of the change MAC address and the source MAC address corresponding thereto; a MAC address forwarding and lookup block for extracting output port information; a MAC address replacing block for forming an output frame by replacing the source MAC address; a MAC address storing block for storing a MAC address; and a frame transmitting block for transmitting the output frame.

Apparatus for changing MAC address to identify subscriber and method thereof

Provided are a method and apparatus for dynamically managing hierarchical flows that more efficiently process packet traffic while maintaining compatibility with an existing packet data network in transferring both circuit traffic and packet traffic in a packet switched network. The method for dynamically managing hierarchical flows includes: receiving data packets, classifying the data packets according to attributes of the received data packets, and producing first flows; determining whether traffic of each of the first flows exceeds a predetermined bandwidth limit, and performing a packet drop process or producing second flows for first flows that exceed the bandwidth limit, according to a flow-specific policy; and performing second flow processing on the second flows according to a second flow policy. Only flows exceeding the bandwidth limit or causing congestion are hierarchically divided for management. This makes it possible to finely manage the flows without complex operations.

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Daejeon-si, South Korea

Dae-Geun Park