Abstract: A handoff system and method between different kinds of devices, an SIP server and an application method of the SIP server applied thereto. The handoff system between different kinds of devices includes a plurality of devices; a SIP server which requests a routing path update when a handoff request signal is input from a source device among the plurality devices, and getting a target device to participate in a current session; and a gateway which updates a predetermined routing path when a request signal for the routing path update is input, and transmitting data to the source device and the target device via the updated routing path.

Abstract: Disclosed are a handoff system and a method among heterogeneous networks. The handoff system among heterogeneous networks has plural access nodes which supports wireless communication with a mobile terminal; and a crossover node which selects resources of an access node to which a handoff is made without repetitive communications between access modes and the mobile terminal in selecting an access node. The handoff system performs a handoff to a network if resources of the network are sufficient for wireless communication.

Abstract: A vertical handover (VHO) method of a media independent handover (MIH) server includes: searching for a second communication network appropriate for a requested VHO, and transmitting MIH terminal information to the second communication network when the VHO is requested from a predetermined MIH terminal connected to a first communication network; requesting the MIH terminal perform the VHO to the second communication network; and transmitting temporary channel information of the second communication network, received from the second communication network, to the MIH terminal, and controlling a temporary channel connection between the MIH terminal and the second communication network.

Abstract: A substrate embedded with a passive device, including a substrate, on which a cavity is formed; a passive device in the cavity, the passive being pre-molded; and a conductive material for adhering the passive device to the cavity, the conductive material being laminated on the cavity.

Abstract: A method for manufacturing a substrate embedded with a passive device, comprising the steps of (a) molding the passive device and (b) mounting the molded passive device in a cavity formed on the substrate, is disclosed. The substrate embedded with a passive device and the manufacturing method thereof in accordance with the present invention can prevent warpage of the substrate caused by disproportioned properties of materials.

Abstract: A queue management method of an access network device includes receiving a packet, determining feasibility of a packet transmission within a delivery deadline allowed from a destination if the received packet is for real-time transmission, storing the packet in the transmission queue and transmitting the packet in sequential order of the storage when the packet transmission within the delivery deadline is feasible, and dropping the packet instead of storing the packet in the transmission queue when the packet transmission is determined infeasible. Accordingly, resources required for the packet transmission are saved.

Abstract: A vertical handover (VHO) method of a media independent handover (MIH) server includes: searching for a second communication network appropriate for a requested VHO, and transmitting MIH terminal information to the second communication network when the VHO is requested from a predetermined MIH terminal connected to a first communication network; requesting the MIH terminal perform the VHO to the second communication network; and transmitting temporary channel information of the second communication network, received from the second communication network, to the MIH terminal, and controlling a temporary channel connection between the MIH terminal and the second communication network.

Abstract: Provided is a method and apparatus for decreasing a handover latency time using a context exchange between a mobile terminal (MT) and a Media Independent Handover Server (MIHS). The method used by the MT for decreasing handover latency between a first network and a second network includes when a handover is performed from the first network to the second network, transmitting to the MIHS information required for first network communication as context; and when a handover is performed from the second network to the first network, receiving from the MIHS first network access information comprising the context through the currently used second network. Accordingly, the MT can reduce a Vertical Handover (VHO) latency time and simultaneously consume almost the same power as a single mode terminal.

Abstract: A method for configuring a Wireless Local Area Network (WLAN) within a Wireless Metropolitan Area Network (WMAN) and a wireless communication system supporting the same are provided. A dual-mode terminal is used as a relay for relaying between the WMAN and the WLAN and the relay divides a total service period into a WMAN period and a WLAN period. For the WMAN period, the relay accesses the WMAN and implements a WMAN service and for the WLAN period, it accesses the WLAN and implements a WLAN service.

Abstract: A method for manufacturing a substrate embedded with a passive device, comprising the steps of (a) molding the passive device and (b) mounting the molded passive device in a cavity formed on the substrate, is disclosed. The substrate embedded with a passive device and the manufacturing method thereof in accordance with the present invention can prevent warpage of the substrate caused by disproportioned properties of materials.

Abstract: A flip chip BGA board is disclosed, in which each of the corners of the board is removed to minimize warpage of the board due to heat applied during the manufacturing process. Embodiments of the invention allow the production of thin boards by preventing warpage of the board, and may provide a board high in reliability since the risk of the chip being separated from the board is reduced.

Abstract: A handoff system and method between different kinds of devices, an SIP server and an application method of the SIP server applied thereto. The handoff system between different kinds of devices includes a plurality of devices; a SIP server which requests a routing path update when a handoff request signal is input from a source device among the plurality devices, and getting a target device to participate in a current session; and a gateway which updates a predetermined routing path when a request signal for the routing path update is input, and transmitting data to the source device and the target device via the updated routing path.

Abstract: Disclosed are a handoff system and a method among heterogeneous networks. The handoff system among heterogeneous networks has plural access nodes which supports wireless communication with a mobile terminal; and a crossover node which selects resources of an access node to which a handoff is made without repetitive communications between access modes and the mobile terminal in selecting an access node. The handoff system performs a handoff to a network if resources of the network are sufficient for wireless communication.

Abstract: A method, medium, and apparatus controlling a handover between different network types, including the operations of transmitting a message requesting a transmission bandwidth change, so as to have a transmission bandwidth supported by a new network after movement of the mobile terminal, from the mobile terminal to the server after performing the handover, changing the transmission bandwidth of the server to be supported by the new network based on the transmitted message of requesting the bandwidth change, transmitting a message acknowledging the changed transmission bandwidth from the server to the router, and transceiving data through a new data transmission tunnel between the router and a new access point within the new based on the message acknowledging the changed transmission bandwidth. Accordingly, loss of data packets occuring when a handover is performed may be effectively prevented.

Abstract: A queue management method of an access network device includes receiving a packet, determining feasibility of a packet transmission within a delivery deadline allowed from a destination if the received packet is for real-time transmission, storing the packet in the transmission queue and transmitting the packet in sequential order of the storage when the packet transmission within the delivery deadline is feasible, and dropping the packet instead of storing the packet in the transmission queue when the packet transmission is determined infeasible. Accordingly, resources required for the packet transmission are saved.

Abstract: A resource reservation system for mobile network environments having a mobile node, routers for intermediating communications between the mobile node and a correspondent node belonging to another network, and neighboring routers geographically adjacent to the router, includes a manager for sending a path request message for establishing a new path to the neighboring routers if a fast resource reservation and release (FREE) initiation message is received from the mobile node if the mobile node as a receiver performs a handoff. If the mobile node enters a communication range of any of the neighboring routers, the manager establishes a new path between the mobile node and the manager through the neighboring router for the communication range according to the sent path request message. Accordingly, the manager performs establishment of a new RSVP path and release of a previous RSVP path at the same time to prevent double resource reservation occasions.

Abstract: In an edge router controlling traffic flows using a buffer in a network handling both real-time traffic and data application traffic, a buffer management-based transmission includes receiving a packet from the network and deciding whether the received packet is a choke packet. If the received packet is not the choke packet, then the received packet is classified into a predetermined traffic class. The buffer is divided logically, and a buffer area of the logically divided buffer is assigned to the traffic class into which the received packet is classified. Control of transmission of the received packet includes either dropping the received packet or storing the received packet in the buffer area assigned to the classified traffic class. Accordingly, the present invention can continuously guarantee appropriate bandwidth required for real-time traffic and, at the same time, prevent a situation in which no bandwidth is assigned to data application traffic.

Abstract: An apparatus for increasing data transmission efficiency in an international mobile telecommunication-2000 (IMT-2000) base station controller includes a) user message determining unit for receiving a user message from an exterior; determining whether the user message is control data or traffic data; and transmitting the control data or the traffic data; b) channel interface unit for receiving the control data or the traffic data from the user message determining unit and transmitting the control data or the traffic data; c) traffic data controlling unit for receiving the traffic data and information about quantity of data and transmitting the traffic data; d) storage unit for storing the control data or the traffic data; and e)storage managing unit for measuring quantity of data stored in the storage means and transmitting measured quantity information.

Abstract: A handover method between mobile switching centers using an intelligent network and an IMT-2000 network system adapting the same are disclosed. The system includes a plurality of RNC each formed of a RACF (Radio Access Control Function) for managing a radio resource and call, an ARF (Access Link Relay Function) for performing an anchor handover between the RNC, and a SACF(Service Access Control Function) for managing and controlling the service, and a plurality of MSC including a SSF(Service Switching Function) for analyzing a service transferred from each of IN and transferring a proper work request to the CCF(Call Control Function) and a CCF for transferring a service request message to the SSF and processing a service request transferred from the SSF for thereby decreasing the consumption of a transfer resource by performing a handover between the MSC using an IN of an IMT-2000 network system.

Abstract: A traffic control method for providing a guaranteed/predictive service which can guarantee a quality of service QOS by controlling transmission routes of various traffic data with a policing function using a moving ceiling MC function and a packet scheduling function using a first in first out FIFO or weighted fair queueing WFQ method, includes the steps of: observing an average transmission rate of packet data inputted through each route by using the MC method; determining whether the packet data satisfies passing conditions of the MC method by a result of the observation; storing the packet data in an output buffer when the packet data satisfies the passing conditions thereof; storing the packet data in an empty space of a certain storing unit, and abandoning the packet data when there is no empty space, in the case that the packet data does not satisfy the passing conditions of the MC method; and transmitting the packet data to a receiving side through a single transmission route after detecting the output