Abstract: Enclosed is a method of supporting mobility using a security tunnel. For the movement of a terminal in a local network and the movement of a terminal to an external network, an active tunnel and a standby tunnel are set to provide mobility to the terminal. When the local network moves, mobility for the local network is provided. The stability of a network is guaranteed using security connection.

Abstract: The present invention relates to tunneling an IPv6 packet through an IPv4 network. In using a tunneling method upon transmitting an IPv6 packet in an IP network, when destination nodes desired to be communicated are located within the same IPv6 prefix network, IPv6 prefix information is added for the management of a tunnel entry. Hence, tunneling information on terminals located within the same IPv6 prefix network can be managed as one tunnel entry. Accordingly, the time consumed when retrieving a tunnel entry can be reduced.

Abstract: A method for providing a service of downloading stereoscopic image data including first image data and second image data in a digital broadcasting system includes: generating information regarding a file name of each of the first image data and the second image data; and transmitting the first image data, the information regarding the file name of the first image data, the second image data, and the information regarding the file name of the second image data. The file name of the second image data includes a prefix indicating the second image data of the stereoscopic image data.

Abstract: A congestion avoidance apparatus includes a reception unit which receives a packet from an input link, a transmission unit which transmits the packet from the reception unit to an output link, a buffer which temporarily stores the packet before being transmitted, a switching unit for routing the packet from the reception unit to the transmission unit, and a controller for controlling the reception unit, transmission unit, buffer, and switching uni. The transmission unit includes a RED/WRED module which determines whether or not to enable a RED/WRED function, based on a traffic type and more specifically a protocol type of the packet. This is accomplished by determining whether or not an upper layer protocol of the packet is TCP, enabling the RED/WRED function if the upper layer protocol is TCP, disabling the RED/WRED function if the upper layer protocol is not TCP, and then storing the packet in a corresponding queue.

Abstract: A bus encoding/decoding apparatus and method for a low power digital signal processor (DSP), which uses a narrow data bus, is provided. The apparatus for encoding n bits of data of a data bus, includes a conditional inverting unit for inverting each of (n−1) lower bits of n data when the most significant bit of the n bits of data is 1, a storage unit for storing the last n bits of data which is output to the bus, and a first exclusive OR operating unit for performing a bitwise exclusive OR operation on the lower (n−1) bits or data, which has been inverted by the conditional inverting unit, and the lower (n−1) bits of the n data, which has been stored in the storage unit, wherein the most significant bit of the n bits of data and (n−1) bits of data, which is obtained as the result of the bitwise exclusive OR operation performed by the first exclusive OR operating unit, are output.

Abstract: A bus encoding/decoding apparatus and method for a low power digital signal processor (DSP), which uses a narrow data bus, is provided. The apparatus for encoding n bits of data of a data bus, includes a conditional inverting unit for inverting each of (n−1) lower bits of n data when the most significant bit of the n bits of data is 1, a storage unit for storing the last n bits of data which is output to the bus, and a first exclusive OR operating unit for performing a bitwise exclusive OR operation on the lower (n−1) bits or data, which has been inverted by the conditional inverting unit, and the lower (n−1) bits of the n data, which has been stored in the storage unit, wherein the most significant bit of the n bits of data and (n−1) bits of data, which is obtained as the result of the bitwise exclusive OR operation performed by the first exclusive OR operating unit, are output.