Abstract:
A personal broadcast service transmitter and a mobile terminal are provided. The mobile terminal receiving a personal broadcast service includes a location information transmitter to transmit location information of the mobile terminal to a personal broadcast service transmitter transmitting the personal broadcast service over a mobile communication network; and a personal broadcast service receiver to receive from the personal broadcast service transmitter the personal broadcast service generated based on the location information of the mobile terminal.
Abstract:
A method and a system for transmitting and receiving Ethernet data to/from a mobile terminal supporting high speed mobility are provided. The method includes: setting a wireless link between a specific access point among a plurality of wireless access points and the mobile terminal and registering identification information of the mobile terminal in the specific access point; allowing the specific access point to transmit an upward Ethernet frame received from the mobile terminal through the wireless link to the service node through the multicast tunnel connected to the specific access point; allowing the service node to recognize whether the mobile terminal is moving and to recognize a multicast tunnel address and identification information of the mobile terminal; allowing the service node to transmit the upward Ethernet frame to an external terminal, receive a downward Ethernet frame corresponding to a response to the upward Ethernet frame, and transmit the received downward Ethernet frame to the plurality of access points connected to the multicast tunnel; and allowing the specific access point, in which the identification information of the mobile terminal is registered, among the plurality of access points that receive the downward Ethernet frame to transmit the downward Ethernet frame to the mobile terminal. Accordingly, when the mobile terminal moves in a wireless LAN environment in which Ethernet data is transmitted and received to and from the mobile terminal, a soft hand-over in which service is not stopped and is stably maintained is provided.
Abstract:
Provided is a method and apparatus for reducing zapping delay, which may transmit base layer data for each burst in a time-slicing scheme, and output the base layer data of a channel to be changed at the time of changing the channel, thereby reducing the zapping delay.
Abstract:
Disclosed are a system and a method for receiving an MBMS broadcasting service. In the present invention, in a mobile communication/wireless communication system, an MBMS service is provided by synchronizing a unicast bearer with a multicast bearer through scheduling information mapping at the time of transmitting a broadcast/multicast service through a unicast. Further, the present invention presents even a method for improving quality of experience (QoE) of the service by providing the MBMS service through the multicast bearer and the unicast bearer simultaneously. According to the present invention, MBMS services of various service qualities can be provided depending on wireless quality of a terminal or the capability of the terminal at the time of providing the MBMS service.
Abstract:
Provided is a method and apparatus for reducing zapping delay, which may transmit base layer data for each burst in a time-slicing scheme, and output the base layer data of a channel to be changed at the time of changing the channel, thereby reducing the zapping delay.
Abstract:
A contents providing apparatus and method is provided. A contents providing apparatus based on a mobile communication network, the contents providing apparatus including: a receiving unit receiving contents and contents providing area information of the contents from a contents provider, the contents providing area information being information about an area where the contents is provided; an area group setting unit retrieving at least one cell based on the contents providing area information, and setting the retrieved at least one cell as a contents providing area group of the contents; and a transmitting unit transmitting the contents to the set contents providing area group.
Abstract:
Provided is a method and apparatus for scheduling a radio access to reduce a channel zapping delay. The radio access scheduling method may receive abstract information with respect to all of currently receivable channels at each channel scheduling interval, and may receive the abstract information in advance and provide the abstract information when a channel change request is received, and thereby reduce the channel zapping delay.
Abstract:
Provided is a switching device for detecting and removing a looping phenomenon in a data communication network and a method using the switching device. The method includes: detecting a frame checksum value; counting the number of times of a checksum value corresponding to the frame checksum value is received; and declaring a looping phenomenon when the number of times exceeds a predetermined threshold. The method makes it possible to easily detect a looping phenomenon using the checksum value.
Abstract:
Provided is a multi-dimensional layered modulation transmitting and receiving apparatus and method for stereoscopic three-dimensional (3D) video data. The transmitting apparatus may convert multi-dimensional data to a plurality of stream data by mapping the multi-dimensional data to a complex number plane, and may transmit the plurality of stream data by mapping the plurality of stream data to dimensions divided based on a time and a space, respectively. The receiving apparatus may determine a signal strength of received signal, a performance, a power mode, may determine a service image corresponding to the signal strength, the performance, the power mode, may determine a dimension corresponding to the service image, and may receive stream data of the determined dimension.
Abstract:
Provided is a multi-dimensional layered modulation transmitting and receiving apparatus and method for stereoscopic three-dimensional (3D) video data. The transmitting apparatus may convert multi-dimensional data to a plurality of stream data by mapping the multi-dimensional data to a complex number plane, and may transmit the plurality of stream data by mapping the plurality of stream data to dimensions divided based on a time and a space, respectively. The receiving apparatus may determine a signal strength of received signal, a performance, a power mode, may determine a service image corresponding to the signal strength, the performance, the power mode, may determine a dimension corresponding to the service image, and may receive stream data of the determined dimension.