Abstract: Provided are a Connection Admission Control (CAC) method and apparatus in a Broadband Wireless Access (BWA) system. The CAC method includes checking a class of a requested service; converting the transmission request rate of the service into the number of required air resource blocks by using an average block capacity of the checked class; and determining whether to admit or deny connection by comparing the number of required resource blocks with the number of available resource blocks.

Abstract: A QoS-based call admission system and method for a mobile communication system. To establish a call for a mobile station according to the QoS of the call, upon request of setup of a call requiring a QoS guarantee, a base transceiver station determines whether a channel element is available. In the presence of an available channel element, the base transceiver station determines whether a remaining bandwidth can support a data rate required to guarantee the QoS. If the data rate is supported, the base transceiver station assigns the channel element and connects its intra switch to a base station controller. Then the base transceiver station transmits a call accept response signal to the base station controller.

Abstract: Disclosed is a method for transmitting a packet through a plurality of physical links in a mobile communication system in which a base station controller (BSC) is connected to a base transceiver system (BTS) through the plurality of physical links. The method includes the steps of determining whether a specific service uses at least two links, when there is transmission data for the service; setting up a sequence number in the transmission packet, when the service uses at least two links; and transmitting the packet through a link selected from the two links. The determining step is performed when there is transmission data for the service, and the setting step is performed when the service uses at least two links.

Abstract: A base station controller (BSC) performs a handoff of a mobile terminal (MT) moving between cells of base transceiver stations (BTSs) in a mobile communication system. If a target BTS is selected as a handoff candidate for the MT as the MT moves from a cell of a source BTS in service toward a cell of the target BTS, the BSC transmits to the target BTS a first message for requesting the target BTS to buffer packets, and transmits packets to be transmitted to the MT to both the source BTS and the target BTS. If the target BTS is determined as a serving BTS for the MT, the BSC transmits to the target BTS a second message including a last sequence number in order to request the target BTS to transmit, to the MT, packets with sequence numbers following the last sequence number of a last packet transmitted from the source BTS to the MT, among the buffered packets.

Abstract: A network interworking system is provided for connecting a voice call between a mobile terminal in a wireless packet network and a mobile terminal in a mobile communication network. A home location register (HLR) registers therein location information of terminals and a subscriber profile. An access point controller (APC) converts data between the mobile communication network and the wireless packet network upon receipt of an origination message including a terminal identifier of a called terminal, and transmits a call connection request to the called terminal. A mobile switching center (MSC) detects a location of the called terminal through the HLR upon receipt of the call connection request from the APC, and transmits a paging message to the detected location of the called terminal. A base station system (BSS) transmits the paging message from the MSC in the mobile communication network to the called terminal.

Abstract: A method and system for providing a short message service (SMS) between a cellular mobile communication network and an IEEE 802.11 WLAN are provided. To provide the SMS between the mobile communication network and the WLAN, a short message gateway (SMGW) is further provided between existing SS7 network and IP network. A mobile terminal (MT) connected to the cellular network is allocated radio resources by a base transceiver station (BTS). One or more BTSs are connected to a mobile switching center (MSC) through a base station controller (BSC). The MSC is connected to an SMS center (SMSC), a home location register (HLR), and the SMGW through the SS7 network. An MT connected to the WLAN is wirelessly connected to an access point (AP) and one or more APs are connected to the IP network and the SMGW through an access router (AR).

Abstract: A data processing apparatus connected to a core network in a communication system and a data processing method therefor are provided. In the data processing apparatus, at least one slow packet processing shelf performs a lower layer operation on traffic received through the low-rate data line. At least one fast packet processing shelf performs a lower layer operation on traffic received through the high-rate data line. If the traffic processed in the packet processing shelves needs high-performance data processing, the traffic is transmitted to at least one data processing shelf. The data processing shelf performs an upper layer operation on the traffics received from the packet processing shelves. A cell switch switches between the packet processing shelves and the data processing shelf.

Abstract: Disclosed is a method for providing a service to MS (Mobile Station) according to a service quality in a service system including MS, BTS(Base Transceiver System) that can communicate with the MS, and a profile server for storing service quality profile information for the MS. The profile server comprises storing identification information indicating a user of the MS along with service quality profiles for the services that can be provided to the MS; and upon receipt of an MS information request from the BTS scheduled to service the MS, providing service quality profiles for the MS to the BTS, and providing a service required by the MS according to a service quality profile for the service.

Abstract: In the capacitor in a semiconductor device, a nitride film is formed over a lower electrode on a semiconductor substrate, and a TaON film is formed over the nitride film. The Al2O3 film is formed over the TaON film, and an upper electrode is formed over the Al2O3 film.

Abstract: A base station controller (BSC) performs a handoff of a mobile terminal (MT) moving between cells of base transceiver stations (BTSs) in a mobile communication system. If a target BTS is selected as a handoff candidate for the MT as the MT moves from a cell of a source BTS in service toward a cell of the target BTS, the BSC transmits to the target BTS a first message for requesting the target BTS to buffer packets, and transmits packets to be transmitted to the MT to both the source BTS and the target BTS. If the target BTS is determined as a serving BTS for the MT, the BSC transmits to the target BTS a second message including a last sequence number in order to request the target BTS to transmit, to the MT, packets with sequence numbers following the last sequence number of a last packet transmitted from the source BTS to the MT, among the buffered packets.

Abstract: An alloy-coated optical fiber and a fabricating method. In the alloy-coated optical fiber, a core is formed of a light transmitting material, a clad surrounds the outer circumferential surface of the core, and an indium-tin-silver coating layer is formed around the outer circumferential surface of the clad while maintaining the alloy temperature at substantially 5° C. above the melting point of this indium-silver alloy coat.

Abstract: A data transmitting method and apparatus with QoS guaranteed in a communication system supporting services with different QoS requirements. The services are classified into a QoS service and a non-QoS service and discriminately processed according to the classification. To maximize the efficiency of transmission links, the data rate of a service is dynamically controlled according to the state of the transmission links. Furthermore, the transmission links are prioritized to guarantee the quality of the QoS service even when data congestion occurs and data burstness is regulated to minimize a congestion period during data transmission. Therefore, QoS guarantee is maximized according to services in a communication system supporting data service.

Abstract: A QoS-based call admission system and method for a mobile communication system. To establish a call for a mobile station according to the QoS of the call, upon request of setup of a call requiring a QoS guarantee, a base transceiver station determines whether a channel element is available. In the presence of an available channel element, the base transceiver station determines whether a remaining bandwidth can support a data rate required to guarantee the QoS. If the data rate is supported, the base transceiver station assigns the channel element and connects its intra switch to a base station controller. Then the base transceiver station transmits a call accept response signal to the base station controller.

Abstract: Disclosed is a method for transmitting a packet through a plurality of physical links in a mobile communication system in which a base station controller (BSC) is connected to a base transceiver system (BTS) through the plurality of physical links. The method includes the steps of determining whether a specific service uses at least two links, when there is transmission data for the service; setting up a sequence number in the transmission packet, when the service uses at least two links; and transmitting the packet through a link selected from the two links.

Abstract: A method and apparatus for retransmitting packet data lost during its transmission from a BSC to a BTS in a mobile communication system. The BTS sequentially receives packets from the BSC and determines whether there is a lost packet. When packet loss is detected, the BTS buffers packets received after a lost packet and requests a retransmission of the lost packet to the BSC. The BSC retransmits the lost packet to the BTS in response to the retransmission request. The BTS rearranges the retransmitted packet and the buffered packets according to the right order and transmits the rearranged packets to an MS.

Abstract: In the capacitor in a semiconductor device, a nitride film is formed over a lower electrode on a semiconductor substrate, and a TaON film is formed over the nitride film. The Al2O3 film is formed over the TaON film, and an upper electrode is formed over the Al2O3 film.

Abstract: Disclosed is a method for manufacturing multilayer ceramics, and in particular, a method for manufacturing multilayer ceramics with improved interlayer bonding by laminating ceramic tapes manufactured from slurry under vacuum and sintering them. The method comprises the steps of: admixing an organic substance comprising a dispersion agent, a plasticizer, and a binder with ceramic powder to give slurry; defoaming the ceramic slurry under vacuum, followed by casting the defoamed ceramic slurry into ceramic tapes; laminating the ceramic tapes at room temperature to 100° C. under vacuum less than 1 atm; burning out the organic substances from the ceramic tapes laminated under vacuum; and sintering the laminated ceramic tapes free of organic substances.

Abstract: In the method for manufacturing a capacitor in a semiconductor device, a nitride film is formed over a lower electrode on a semiconductor substrate, and a TaON film is formed over the nitride film. The Al2O3 film is formed over the TaON film, and an upper electrode is formed over the Al2O3 film.

Abstract: In the method for manufacturing a capacitor in a semiconductor device, a nitride film is formed over a lower electrode on a semiconductor substrate, and a TaON film is formed over the nitride film. The Al2O3 film is formed over the TaON film, and an upper electrode is formed over the Al2O3 film.

Abstract: There is provided an alloy-coated optical fiber and a fabricating method thereof. In the alloy-coated optical fiber, a core is formed of a light transmitting material, a clad surrounds the outer circumferential surface of the core, and an indium-tin-silver coating layer is formed around the outer circumferential surface of the clad.