Abstract: A multi-mode terminal (MMT) including a plurality of interfaces which provides access capability to heterogeneous networks respectively to provide quick handover between the heterogeneous networks, is provided. In this instance, when a Binding Update (BU) message is transmitted to a home agent via each of the plurality of interfaces, routers existing in a path to the home agent may update path latency information and path bandwidth information as a Binding Unique Identifier (BID) sub-option extension of Mobile Nodes and Multiple Interfaces in Internet Protocol version 6 (MONAMI6). In this case, the home agent may receive the BU message and select a care-of address (CoA) by referring to path latency information and path bandwidth information, included in the BU message. Also, the home agent may transmit a success binding acknowledgement (BAck) message with respect to the BU message of the selected path.

Abstract: A resource reservation system and method in a multihoming environment are disclosed. The method includes: transmitting query messages from the mobile node to multiple adjacent access routers using a plurality of care of addresses (CoAs) stored in the mobile node; transmitting the query messages from the adjacent access routers to a crossover node; at one or more intermediate nodes on a communication path between the adjacent access routers and the crossover node, recording available resource information in the query messages; receiving the query messages at a predetermined correspondent node; analyzing, at the correspondent node, the recorded available resource information in the received query messages and selecting a communication path which transferred a query message containing available resource information indicating the available resources required by the mobile node; and transmitting a resource reservation message from the correspondent node to the mobile node through the selected communication path.

Abstract: A method of providing a handover service to a mobile communication terminal supporting multi-modal communications, and a mobile communication terminal for performing the method are provided. More particularly, a method of eliminating an interruption of a data transmission service occurring during a handover between different communication networks, and a terminal for performing the method are provided. A method of providing a handover service of a mobile communication terminal supporting multi-modal communications can include: transmitting and receiving data to/from a corresponding node via a first access network and a second access network while simultaneously maintaining an association with the first access network and the second access network, determining a point in time of completing a handover registration, and releasing an association with the first access network after the point in time of completing the handover registration.

Abstract: Vertical handover apparatus and method in a wireless communication system are provided. The method includes examining whether there exists an accessible target network while communicating with a serving network; when there exists the accessible target network, linking up to the target network; changing a communication state to an idle mode by de-registering the linked target network; and performing a network re-entry to the target network in a vertical handover to the target network. When the terminal can execute the vertical handover without the seamless service support and reduce the handover delay.

Abstract: Disclosed are a system and a method that generates image data that represent a speaker to be distinguished, and enables a mobile terminal to provide a video conference service using the image data that distinguishes the speaker. A video conference apparatus may include a speaker distinguishing unit to distinguish, as a speaker, a participant who is speaking from a plurality of participants in the video conference and an image data generating unit to generate image data that represents the distinguished participant differently from other participants.

Abstract: An end-to-end quality-of-service (QoS) interoperation apparatus and method in a heterogeneous network environment are provided. A Next Steps In Signaling (NSIS) Application Programming Interface (NAPI) block handles an NSIS API at the request of an upper layer. An NSIS entity handles an NSIS protocol stack at the request of the NAPI block. An Internet Protocol Bearer Service (IP BS) manager manages an IP BS. A translation block translates parameters of a 3GPP_CLASS object and a UMTS QoS class predefined in an NSIS message according to a predetermined mapping configuration. A memory stores a software application including a Universal Mobile Telecommunication System Bearer Service (UMTS BS) manager for managing a UMTS BS. A processor combined with the memory, controls the software application.

Abstract: An energy-aware routing method and energy-aware routing system, the energy-aware routing apparatus for use with a multi-hop system including at least one terminal and at least one base station, the apparatus includes a transceiving unit for receiving a route request message including battery information from each of the at least one terminal; and a control unit for receiving the route request message from the transceiving unit and selecting a communication path from configurable paths by using the battery information.

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 system for reserving resources in a mobile network. A mobile node reports a start of a handover to a present access router if the handover of the mobile node occurs, and the previous access router transmits specified session information to a candidate access router that has a possibility handling the mobile node's handover. A candidate crossover router, which performs a resource reservation work on a new path and a resource release on the previous path, is searched, and a localized resource reservation is established by exchanging a specified resource reservation message before the handover is completed if the candidate crossover router is determined. Accordingly, duplication of resources can be prevented, and a prompt resource reservation can be achieved during the handover.

Abstract: A method of managing a routing table by interoperating with a routing block and a radio resource management (RRM)/scheduling block in a plurality of nodes of a multi-hop system, the method including computing a traffic load rate of each path which transmits traffic and updating the routing table with the computed traffic load rate via the routing block; and updating a plurality of metrics included in the routing table based on the traffic load rate and information transmitted from a neighbor node via the RRM/scheduling block.

Abstract: A method of configuring and registering an Internet Protocol (IPv6) address in a wireless mobile communication system having a connection-oriented radio link is provided. In an IP configuration method without Duplicate Address Detection (DAD), a Mobile Station (MS) is allocated a unique Connection Identifier (CID) specific to the MS from a serving Base Station (BS), and the MS and BS configure the IPv6 address independently using a known network prefix, a Medium Access Control (MAC) address of the MS, and the allocated CID. The BS registers the configured IPv6 address to a HA on behalf of MS.

Abstract: A method and apparatus for optimizing a cross layer in an ad-hoc wireless network are provided. A link price is set using the number of packets of a queue. A flow rate is set using the link price. A channel access rank is set by comparing the link price with a link price of a neighboring node. A channel access backoff time is set based on the channel access rank. The method and apparatus for optimization may not be subject to interference and can simultaneously obtain fairness and efficiency while adaptively setting link capacities.

Abstract: A communication system having a source node, at least one mobile node, and a router that transmits data packets transmitted from the source node to a corresponding one of the at least one mobile node and multiplexes response signals to the data packets received from the corresponding one of the at least one mobile node to transmit the multiplexed response signals to the source node. The communication system includes: a link monitoring unit which calculates a capacity of a wireless link between the router and the corresponding one of the at least one mobile node; and a congestion control and adjustment unit which adjusts window field values in the response signals according to the calculated capacity. The router transmits the response signals, the response signals including the adjusted window field values to the source node, and the source node sequentially transmits the data packets on the basis of the adjusted window field values.

Abstract: A mobile network is disclosed in which there exists a Mobile Node (MN), the MN is managed by a first Access Router (AR), and there exists a second AR with a subnet different from the first AR. A method is provided for the MN performing a fast handoff from the first AR to the second AR, which includes receiving a Routing Advertisement (RA) message of the second AR from the first AR, generating an IP address to be used in the second AR using the RA message of the second AR if the MN recognizes that it should perform a handoff from the first AR to the second AR, performing a trigger for using the generated IP address if the movement to the second AR is completed, and transmitting/receiving a Correspondent Node (CN) and data using the IP address.

Abstract: A method of signaling quality of service information in response to a handover from a first access network to a second access network in an Internet Protocol (IP) based mobile network environment, the method comprising: transmitting a resource reservation message from a mobile node to the second access network; transmitting the resource reservation message to an IP-based core network from the second access network; and transmitting a resource reservation confirm message to the mobile node.

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 multi-mode terminal (MMT) including a plurality of interfaces which provides access capability to heterogeneous networks respectively to provide quick handover between the heterogeneous networks, is provided. In this instance, when a Binding Update (BU) message is transmitted to a home agent via each of the plurality of interfaces, routers existing in a path to the home agent may update path latency information and path bandwidth information as a Binding Unique Identifier (BID) sub-option extension of Mobile Nodes and Multiple Interfaces in Internet Protocol version 6 (MONAMI6). In this case, the home agent may receive the BU message and select a care-of address (CoA) by referring to path latency information and path bandwidth information, included in the BU message. Also, the home agent may transmit a success binding acknowledgement (BAck) message with respect to the BU message of the selected path.

Abstract: A method, medium, and system for reserving resources in a mobile network. A mobile node reports a start of a handover to a present access router if the handover of the mobile node occurs, and the previous access router transmits specified session information to a candidate access router that has a possibility handling the mobile node's handover. A candidate crossover router, which performs a resource reservation work on a new path and a resource release on the previous path, is searched, and a localized resource reservation is established by exchanging a specified resource reservation message before the handover is completed if the candidate crossover router is determined. Accordingly, duplication of resources can be prevented, and a prompt resource reservation can be achieved during the handover.

Abstract: Vertical handover apparatus and method in a wireless communication system are provided. The method includes examining whether there exists an accessible target network while communicating with a serving network; when there exists the accessible target network, linking up to the target network; changing a communication state to an idle mode by de-registering the linked target network; and performing a network re-entry to the target network in a vertical handover to the target network. When the terminal can execute the vertical handover without the seamless service support and reduce the handover delay.

Abstract: A system and method for providing Multicast/Broadcast Service (MBS) service to a mobile terminal in an MBS service provisioning system in a Wide Area Network (WAN) network are provided. An authentication server sends a message for requesting resource reservation, in which a Quality-of-Service (QoS) policy is included, when a registration procedure of the mobile terminal is performed. A base station stores the message sent from the authentication server, forwards the message to the mobile terminal, and sets up a channel to the mobile terminal upon receiving from the mobile terminal a request for channel setup based on the QoS policy.