Abstract: A wireless access router for separately controlling a traffic signal and a control signal is provided. In a mobile communication access network structure, in order to optimally support a mobile communication terminal, a control signal and a traffic signal of a base station are divided, and a router is controlled by mobile communication system functions such as a mobility management function, a QoS management function, a session control of the terminal, a mobility control, and a QoS control function that are effectively processed. With a wireless access router having the divided control signal and traffic signal, it is expected the traffic concentration and a packet transmission delay can be prevented.

Abstract: A system for providing fuel-efficient driving information for a vehicle includes a fuel-efficient driving area calculation unit and a display unit. The fuel-efficient driving area calculation unit calculates a variable fuel-efficient driving area, which is divided into economical, semi-economical, and uneconomical regions, depending on the increase or decrease of the speed of the vehicle, calculates a current fuel efficiency of the vehicle, receives information about the type and condition of a road from a GPS, and adjusts the regions in the fuel-efficient driving area to prompt the driver to increase or decrease the vehicle speed in advance. The display unit displays the fuel-efficient driving area using information calculated by the fuel-efficient driving area calculation unit, and indicates the current fuel efficiency using the regions.

Abstract: A system for assisting fuel-efficient driving includes a storage unit for storing a shift pattern map, a collection unit for collecting the driving state information of a vehicle, a driving state calculation unit for calculating a current driving state and a target driving region on the basis of the information from the collection unit and the shift pattern map, and a display control unit for displaying the current driving state and the target driving region on a display to make it possible to compare the current driving state and the target driving region on the basis of at least acceleration or speed.

Abstract: The present invention relates to an internet protocol (IP) mobile communication system and a session initiation method thereof. In the IP mobile communication system, a session initiation process using a session initiation protocol is performed for real-time mobile multimedia communication. At this time, not only multimedia codec but also session and quality of service (QoS) information is negotiated from a transmitting terminal to a receiving terminal, and is negotiated between relating network elements. An access manager controls a mobile access router which is a gateway of an access network according to the negotiated session and QoS information. Therefore an additional QoS negotiation process is not necessary for a session guaranteeing the QoS between a terminal and the mobile access router, between the mobile access routers, and between the mobile access router and the receiving terminal.

Abstract: There is provided a method for performing an intra-packet data service node (PDSN) soft handoff. The method is implemented by setting up a channel passing through a target base station controller (T-BSC), a source base station controller (S-BSC) and a PDSN by establishing a direct channel link between the S-BSC and the T-BSC in an active packet session mode, performing a handoff between the S-BSC, the T-BSC and a mobile station (MS), transmitting or receiving user packet data exchanged between the MS, and the S-BSC and the T-BSC to or from the PDSN through the established channel link and sending or receiving user packet data exchanged between the MS and the T-BSC to or from the PDSN through the established channel link when the handoff is completed.

Abstract: There is provided a method for performing an intra-packet data service node (PDSN) soft handoff. The method is implemented by setting up a channel passing through a target base station controller (T-BSC), a source base station controller (S-BSC) and a PDSN by establishing a direct channel link between the S-BSC and the T-BSC in an active packet session mode, performing a handoff between the S-BSC, the T-BSC and a mobile station (MS), transmitting or receiving user packet data exchanged between the MS, and the S-BSC and the T-BSC to or from the PDSN through the established channel link and sending or receiving user packet data exchanged between the MS and the T-BSC to or from the PDSN through the established channel link when the handoff is completed.

Abstract: There is provided a method for performing an inter-packet data service node (PDSN) soft handoff. The method is implemented by setting up a channel passing through a target base station controller (T-BSC), a source base station controller (S-BSC) and a source-PDSN (S-PDSN) by establishing a direct channel link between the S-BSC and the T-BSC in an active packet session mode, performing a handoff between the S-BSC, the T-BSC and a mobile station (MS), transmitting or receiving user packet data exchanged between the MS, and the S-BSC and the T-BSC to or from the S-PDSN through the established channel link and sending or receiving user packet data exchanged between the MS and the T-BSC to or from the S-PDSN through the established channel link when the handoff is completed.

Abstract: A high speed handoff in a packet mobile communication network is disclosed. A packet radio communication network for providing a packet data service such as the internet in the IMT-2000 is being developed in many countries of the world. In this context, a network constitution, functions for respective constituents and a service providing procedure are disclosed for PN-4286. In the PN-4286, however, the conventionally proposed packet handoff procedure is based on the assumption of a simple data service. Therefore, a high speed handoff cannot be supported unlike in the line network, due to the re-setting of the link levels, the user certification and the IP registration of the packet terminal. This makes the real time service difficult in the packet network, and therefore, the use of the mobile packet network is limited to the simple data service. The present invention solves these problems by proposing a new handoff procedure.

Abstract: Disclosed is a system for providing a chat service, which enables a user of a mobile terminal to search for another user meeting some specified requisites for a chat partner and to virtually talk with him/her, the system including: a mobile communication system being in radio communication with the mobile terminal; a chat server connected to a network for providing the chat service; and a radio operator gateway for switching different data and protocols between the mobile communication system and the network. The chat server includes personal information and requisite information of at least one member. Upon a request of the user of the mobile terminal for the chat service, the system searches for a member meeting the requisites of the user for a chat partner based on the personal information of the individual members, compares the requisite information of the user with that of the searched member to select a chat partner and enables the user to virtually talk with the selected chat partner.

Abstract: A phase shifting photomask fabrication method includes the steps of forming a plurality of opaque patterns on a transparent substrate, forming a first protection layer pattern to cover portions of the opaque patterns and the transparent substrate, etching the transparent substrate to form a transmissive portion using the opaque patterns and the first protection layer pattern as a mask, forming a second protection layer on respective upper surfaces of the transmissive portion, the opaque patterns and the first protection layer pattern, removing a portion of the second protection layer to expose the first protection layer pattern, removing the first protection layer pattern and exposing the opaque patterns and the transparent substrate, growing an aluminum layer using the exposed opaque patterns as a seed to form an aluminum pattern, etching the exposed transparent substrate, anisotropically etching the aluminum pattern, and re-etching the transparent substrate surface exposed by anisotropically etching the alu

Abstract: A minimum value/maximum value extractor and method including: a multiplexer for outputting data and inverted data receiving from data lines depending on a maximum/minimum value selecting signal; a plurality of maximum value extracting parts for receiving the output of the multiplexer, a clock signal and a reset signal, the extracting parts outputting a first output which becomes the same signal state as that of the initially input data bits and maintains "0" regardless of subsequent data bits value once the input data bit becomes "0" until the reset signal is applied, and a second output which follows the first output value by delayed by two clock cycles; a maximum value/minimum value signal generator for outputting a value which is a NORed value of all inputs from the extracting parts as a minimum value or a value which is an inverted value of the NORed value of all inputs from the extracting parts as a maximum value; and a plurality of reset signal generators for generating the reset signal for resetting th

Abstract: The invention once stores PCM data to a memory and after a predetermined time is elapsed, reading in again and making to output whereby makes to delay the PCM data. The invention comprises a memory for once storing a PCM data converted to parallel, a delay time setting circuit for setting a delay time of PCM data, and a comparator and control circuit for comparing a setting value from the delay time setting circuit and a high order 10 bits writing address of the memory and thereby providing an address and control signal for either initiating a high order 10 bits reading address of the memory or else for writing or reading to the memory.

Abstract: A base station controller interface of the code division multiple access (CDMA) mobile system is described for interfacing between the base station controller and the CDMA mobile switching center (MSC) of the CDMA mobile system (CMS). The base station controller decreases the load of the system by including, for every base station controller interface, the mobile announcement (MANM) to service the state information of the subscriber of interest for all paging to the mobile subscriber. At the same time, the connection between the base station controller and the base station controller interface of the mobile switching center utilizes the EL 2048 Kbps interfacing technique applying the conventional communication network recommended in the ITU-T. The transmission of the message and the call traffic using the interfacing technique is performed to be linked with the TSB of the base station controller.

Abstract: The invention is a method for controlling an echo canceller circuit including a data storage for storing a program for processing digital signals to cancel an echo in PCM encoded voice data, a plurality of digital signal processors each having a reset terminal and which are downloaded with the program which is executed by the plurality of digital signal processor to carry out removal of the echo in the PCM encoded voice data, and a one chip controller for performing control functions of the echo canceller.