Abstract: A communication system and a method for performing short message services in the communication system are disclosed. The communication system includes: a radio link control (RLC) layer for dividing a data unit having a first length corresponding to short messages transmitted from a higher layer on a down link into data units having second lengths, and for reconstructing data units having third lengths transmitted from a lower layer on an up link into data units having fourth lengths; and a media access control (MAC) layer for multiplexing logical channels assigned for the data units having the second lengths on the down link with different logical channels, performing scheduling for the data units having the second lengths to obtain schedule messages, and demultiplexing transmission channels multiplexed from the lower layer on the up link.

Abstract: Disclosed is a method for performing fast distributed sample acquisition (DSA). A spreader generates a data signal by spreading an incoming data stream over a range of spectrum according to a locally generated first main sequence, and samples the state sample of the main sequence. A sample spreader outputs a first state signal by spreading a symbol according to a locally generated first subsequence. A sample despreader reconstructs the transmitted binary orthogonal symbols by despreading the first state signal obtained from the sample spreader according to a locally generated second subsequence to detect the first main sequence state sample. A despreader compares the state sample obtained from the sample despreader with a locally generated state sample and makes correction on a local SRG to generate a second main sequence having new state. An incoming data stream is reconstructed by despreading the data signal obtained from the spreader according to the second main sequence.

Abstract: A system and method for detecting an error in a transmission of data through an ATM cell in a ATM switching system is disclosed. The present invention allows a system manager to easily detect errors as the errors occur in the ATM switching system.

Abstract: The pilot patterns of the preferred embodiment are used in a communication system. The pilot patterns of 15 slots are especially suitable for Third Generation communication systems, and allow a simpler construction of a correlation circuit for a receiver.

Abstract: A DS3 frame structure, video data transmitting/receiving apparatus and method for transmitting and receiving video data can minimize the transmission error during the video data transmission, and can multiplex and transmit two video signals using the DS3 formatted frame. The DS3 frame structure includes a plurality of unit frames each of which includes a frame field for controlling data transmission, an information field of signal data, and a channel coding overhead field for correcting an error in the signal data.

Abstract: The present invention relates to an apparatus for transmitting and receiving a message between processors for a distributed type processing system and a method therefor. In the distributed type processing system capable of performing a real time communication among a plurality of processors, there are provided the steps for packing a plurality of messages in a certain message format when transmitting a message, judging an information included in the message format when receiving a message from another processor, and unpacking the packed messages into a plurality of messages.

Abstract: A WLL (wireless local loop) system using a CDMA (code division multiple access) method includes a data transmitter, a data receiver, a data transmission/reception buffer, and a controller. The system implements a voice and data communication which includes the steps of performing a voice communication through a plurality of voice communication channels assigned to respective subscribers by a circuit switching method during a transmission/reception of the voice signal, and performing a data communication by a packet switching method in a way in which a plurality of subscribers share in common predetermined data communication channels during the transmission/reception of the data signal.

Abstract: Radio protocol for a next generation mobile communication system is disclosed including a radio link control layer for connecting to an upper layer through a service access point provided in advance and for connecting to a lower layer through a plurality of logic channels provided in advance. The radio link control layer includes at least one radio link control entity for transmission/reception of data to/from up-link or down-link according to a form of a data transmission mode.

Abstract: A video/audio alarm processing method and apparatus for a base station manager in a mobile radio communication system capable of classifying trouble state data of base station controllers and base stations by grades and informing to a user the trouble state as video and audio alarms in accordance with the classified grade of the trouble state data. According to the method, the data of a predetermined number of bits which is received from the base station controllers and base stations is converted and stored, and whether the trouble state data exists or not in the stored data is judged. If the trouble state data exists, it is classified by grades, and the video and audio alarms are produced in accordance with the classified grade of the trouble state data.

Abstract: An optical channel dispersion compensating and monitoring apparatus when an optical signal transmits from an optical transmitter to an optical receiver through an optical fiber is disclosed. A WDM optical amplifier comprising the optical channel dispersion compensating and monitoring apparatus, for a long distance is also disclosed. A WDM optical channel dispersion compensating and monitoring apparatus comprises a dispersion compensating unit for compensating the optical signal distorted in the optical fiber at each channel when the optical signal transmits from an optical transmitter to an optical receiver through the optical fiber and an optical channel monitoring unit for converting an optical power as the portion of the compensated optical signal to electric signals and monitoring the converted electric signals.

Abstract: A method for performing cell broadcasting and a communication system using the same are provided. The method includes steps of receiving in a mobile station at least one data unit of a short message service cell broadcasting (SMSCB) message broadcast from at least one cell of a communication system; and reading the SMSCB message based on the schedule message, wherein the schedule message is comprised of a plurality of fields for informing the mobile station of a location of the SMSCB message, a length of a schedule period, and whether a new SMSCB message has been broadcast.

Abstract: Mobile Internet system and method in a mobile communication network is disclosed, in which a mobile host given an Internet Protocol address uses an existing Code Division Multiple Access type mobile network and an Home Location Register and an Inter-Working Unit in a personal communication system network to establish communications without restricting a mobile host to a particular network. The mobile Internet system and method includes a plurality of mobile hosts, a plurality of mobile access points, a mobile router, and a plurality of gateway routers.

Abstract: This invention relates to the method of doing a broadcast service of a short message in a communication system. According to the present invention, a transmission request message of a broadcast message including the name and telephone number of an information provider is received from the information provider through a message center. The transmission request message of the broadcast message processed in the message center is transmitted from the message center to a base station and therefrom to all terminals. The terminals receive the broadcast message including the information provider's name and telephone number and displays them on the display devices of the terminals. When the terminal user wants to communicate with the information provider, the terminal performs the process for communication between the information provider and the user by using the received information provider's telephone number.

Abstract: A signaling network layer protocol of an ATM-based mobile communication network including an MSC and an RNC connected by point-to-point in which a predetermined message form, a primitive between an upper and a lower layers, a state of a protocol individual and an operational procedure are defined so that a signal message between the MSC and the RNC is processed through a single signaling network layer (SNL).

Abstract: Disclosed is a method for performing fast distributed sample acquisition (DSA). A spreader generates a data signal by spreading an incoming data stream over a range of spectrum according to a locally generated first main sequence, and samples the state sample of the main sequence. A sample spreader outputs a first state signal by spreading a symbol according to a locally generated first subsequence. A sample despreader reconstructs the transmitted binary orthogonal symbols by despreading the first state signal obtained from the sample spreader according to a locally generated second subsequence to detect the first main sequence state sample. A despreader compares the state sample obtained from the sample despreader with a locally generated state sample and makes correction on a local SRG to generate a second main sequence having new state. An incoming data stream is reconstructed by despreading the data signal obtained from the spreader according to the second main sequence.

Abstract: The present invention provides a method and apparatus for modifying channel information in a digital translator of a digital communication system so that when a broadcasting signal is transmitted using a transmitting channel different from a receiving channel, the channel information stored in the broadcasting signal can be appropriately modified according to the transmitting channel. A method of operating a digital communication system having a translator related to the present invention includes detecting a start time of a compressed data extracted from a transmitted digital TV broadcasting signal. Then, it is determined whether a channel information stored in the data is identical to the prescribed channel information. When the channel information stored in the data is not identical to the prescribed channel information, the channel information stored in the data is modified according to the prescribed channel information.

Abstract: In the preferred embodiment, the transmission length of the non-full rate frame is shortened frame in order for the mobile terminal to monitor other frequencies with a single receiver. Modulated symbols of non-full rate frame are transmitted with reduced repetition maintaining the sum of repeated symbol energy. Generally, for 1/n (n=2,4,8) length transmission, 1/m (m≧n) rate frame repeated m/n times and transmitted with n/m symbol energy of the full rate frame. The system may use rate limitation to generate a non-full rate frame. A position of the transmitted symbols may be randomized by a mobile specific predetermined random code to minimize interference between terminals different from each other. For intensive frequency scanning and synchronization signal transmission, non-transmitting period can be assigned for successive frames of some interval.

Abstract: Disclosed is a local multipoint distribution service(LMDS) system, in which the cost for installation and maintenance is lower comparing to a cable communication system, it takes a little time to install the system, and a variety multimedia communication services can be provided. According to one feature of the present invention, the LMDS system comprises a data/signal handler for multiplexing and modulating packet data received from a network, and for demodulating and demultiplexing an optical signal received; and at least one base stations for down-converting the multiplexed and modulated packet data into a radio frequency(RF) signal, and for converting an RF signal received into an optical signal so as to send to the data/signal handler.

Abstract: A method and apparatus for processing a data packet of an Ethernet switch system in which packet information is transferred from a first device to a second device on the basis of field information of a packet inputted through an Ethernet, including the steps of: detecting a first address from a packet inputted to a predetermined input port of a MAC through the Ethernet; determining an output port of a packet to be detected from the MAC on the basis of the first address provided from the MAC on a real time basis and a MAC address stored in a search memory; and detecting whether the determined output port is ready to use or not and transferring a packet detected from the MAC to the Ethernet through the output port.

Abstract: A point to multipoint radio service is disclosed which enables a mobile telephone network subscriber to transmit data simultaneously to a plurality of public switched telephone network subscribers. According to the present invention, a plurality of calls originate from the mobile telephone network subscriber, modems in an interworking function device are allocated with respect to the calls, and then wire modems and traffic paths of the PSTN subscribers are established corresponding to the originating calls after the modem allocation.