Samsung Electronics Co., Ltd.

Hee-Jin Jang

Youn-hee Han

Jin-Hyeock Choi

Xiaoyu Liu

Jong Ho Bang

Jong-Ho Bang

Su Won Lee

Chee Ha Kim

Mi-Sun Do

Youn-Hee Han

Boung Jun Lee

Jae-Hoon Kim

Byoung-Joon Lee

Yegin Alper

Choong-hun Lee

Sung-Gi Min

Xiao-ming Wang

JinHyeock Choi

Young Don Chung

Choong-Hun Lee

A method of transmitting/receiving a frame between a portable terminal and a base station in a wireless broadband Internet network are provided. More particularly, a method of transmitting/receiving frames can include activating a session between the portable terminal and the base station, removing at least one header information field included in an Internet protocol (IP) datagram after activating the session, adding a network header which sets a predetermined transport connection identifier (TCID) to the IP datagram, generating the frame, and transmitting the generated frame via the activated session. Preferably, the frame is generated in any one of the portable terminal and the base station, and transmitted to the other one of the portable terminal and the base station.

Method of and apparatus for transceiving data frame in wireless broadband internet network

The present invention relates to a wireless network, and more particularly, a method (*'and system'?*) which a mobile station discovers a neighbor network in an Internet protocol based wireless network, a network management server for enabling the method, and a method of operating the network management server. A network management server of a wireless network system, the server including: a neighborhood (NH) database maintaining configuration information with respect to at least one neighbor network; a communication interface receiving a request message for capability/configuration information of the neighbor network from a mobile station which is connected via a predetermined access point or a base station; and a database management unit extracting the capability/configuration information of the neighbor network which is included in the request message by referring to the neighborhood database, and controlling a reply message including the capability/configuration information to be transmitted to the mobile station via the communication interface.

Method for discovering neighbor networks in mobile station and network system for enabling the method

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.

Mobile communication terminal supporting multi-modal communications and methods for providing seamless service upon handover to the mobile communication terminal

A handoff apparatus and method in FMIPv6 for seamless TCP packet transmissions. The handoff method includes steps of intercepting by a previous access router certain TCP packets sent from a correspondent node to a previous temporary address of a mobile node; and creating a TCP ACK by the previous access router in response to the certain TCP packets and sending by the previous access router the created TCP ACK to the correspondent node every time the certain TCP packets are forwarded to a new access router through a bi-directional tunnel. The handoff method has an advantage in that the packet transmission rate can be secured at the same level as the mobile node stays still during the performance of the handoff of the mobile node since the previous access router instead of the mobile node creates and sends the TCP ACK to the correspondent node during the performance of the handoff of the mobile node.

Handoff method in FMIPv6 for seamless TCP packet transmissions

An apparatus and method for providing a seamless communication service in a wireless communication system. The method includes transmitting a first message to a base station when an IP subnet has been changed due to movement of the portable terminal, the first message including a Medium Access Control (MAC) address of the portable terminal, receiving IP address information from the base station, which can be used in a new IP subnet, and configuring a new IP address based on the received IP address information.

Method and system for configuring IP address in a wireless communication system

A mobile station and method for neighbor discovery are provided. The mobile station comprises a mapping table storing a connection identifier (CID) prefix and a neighbor identifier, a controller generating a CID with respect to a message that will be transmitted by referring to the mapping table, and a message transmitter transmitting, by using the CID, the message to a base station connected to the mobile station.

Method and apparatus for neighbor discovery in IPv6-based mobile system

Mobile communication terminal supporting multi-modal communications and method for providing seamless service upon handover to the mobile communication terminal

A method and mobile terminal for allocating an Internet protocol (IP) address in a wireless network. A method of allocating an IP address in a wireless network which is applied to a system including a mobile terminal and an access router (AR) storing IP addresses, which are used on a connected link, in an address cache, managing the IP addresses, and performing a duplicate address detection (DAD) based on the IP addresses, the method including confirming whether a notification message, transmitted from the AR, is received, and automatically configuring an IP address and requesting the AR to perform the DAD with respect to the automatically configured IP address, when the notification message is received.

Method and mobile terminal for allocating IP address in wireless network

A mobility supporting method and a mobility supporting system using the method are provided. The mobility supporting method includes a first access router for allocating a prefix to a mobile terminal, and registering the allocated prefix in an authentication server when the mobile terminal connects to the first access router. There is also the authentication server for verifying the mobile terminal based on the registered prefix, and reporting a result of the verifying of the mobile terminal to a second access router when the mobile terminal moves to connect to the second access router and the second access router for notifying the reported result of the verifying the mobile terminal to the first access router.

Mobility supporting method of mobile terminal based on prefix binding and mobility supporting system using the method

A mobile terminal and method of notifying an access router of an Internet protocol (IP) address of the mobile terminal in a wireless network are provided where a mobile terminal notifies an access router of an IP address of the mobile terminal, performing duplicate address detection (DAD) with respect to an automatically-configured IP address are performed, and a notification message including the IP address resulting from the performing of the DAD are transmitted to the access router. The access router is notified by using the notification message. The mobile terminal uses the IP address, based on whether there is a response with respect to the notification message transmitted to the access router after the performing of the DAD.

Mobile terminal and method for notifying access router of IP address in wireless network

An apparatus and method of setting an address of a communication apparatus is provided where when an access router transmits a Router Advertisement (RA) message to the communication apparatus, the communication apparatus sets an address establishment scheme of the communication apparatus according to a first field of the RA message. The RA message includes information about the address establishment scheme, which the communication apparatus is able to use, in the first field.

Apparatus and method for supporting establishment of network address of communication apparatus

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.

Method of configuring and registering internet protocol address in a wireless mobile communication system having connection-oriented radio link

A handover method of a mobile station (MS) in a mobile communication system having MSs and radio access stations (RASs), each of which includes an IEEE 802.16 standard-based medium access control (MAC) layer and an Internet protocol version 6 (IPv6)-based IP layer. The handover method includes the step of gathering IP network information of a neighbor RAS through a message exchange with a previous RAS. A target RAS for handover based on the gathered IP network information of the neighbor RAS is determined, after the target RAS is determined, the previous RAS tunnels data for targeting the MS to the target RAS, Then the tunneled data are received from the target RAS.

Fast handover method for IPv6 over 802.16 network

Provided is a method of generating and managing a connection identifier (CID) for supporting an IPv6 multicast in a wireless network based on IEEE 802.16 and a network interface using the method. Further provided is a network interface included in a node of IPv6-based wireless network, the network interface includes a MAC driver for storing at least one multicast CID and a MAC address of the node which is mapped in the at least one multicast CID, and a control unit for receiving a multicast message which is transmitted from a base station, and transferring the multicast message to an IP layer, when the multicast message includes the multicast CID which is stored in the MAC driver.

Method of generating and managing connection identifiers for supporting multicast for each group in IPv6-based wireless network and network interface using the method

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Yongin-si, South Korea

Hee-Jin Jang