Electronics and Telecommunications Research Institute

Sk Telecom Company, Ltd.

Kt Corporation

Samsung Electronics Co., Ltd.

Ktfreetel Co., Ltd

Hanaro Telecom., Inc.

Yeong-Jin Kim

Yeon-Seung Shin

Seung-Kwon Baek

Chul-Sik Yoon

Won-Ik Kim

Jee-Hwan Ahn

Ji-Soo Park

Jae-Su Song

Jung-Mo Moon

Sung-gu Choi

Soo-Chang Kim

Ae-Soon Park

Young-Jick Bahg

Seok-Heon Cho

Sang-Woo Nam

Mi-Young Yun

Hyung-Sub Kim

Dong-jin Shin

Sun-Hwa Lim

Bong-Ju Lee

Nam-hoon Park

Seung-que Lee

Soon-Gi Park

Jee-Hyeon Na

Sung-Gu Choi

A wireless access router for separately controlling a traffic signal and a control signal is provided. In a mobile communication access network structure, in order to optimally support a mobile communication terminal, a control signal and a traffic signal of a base station are divided, and a router is controlled by mobile communication system functions such as a mobility management function, a QoS management function, a session control of the terminal, a mobility control, and a QoS control function that are effectively processed. With a wireless access router having the divided control signal and traffic signal, it is expected the traffic concentration and a packet transmission delay can be prevented.

Mobile wireless access router for separately controlling traffic signal and control signal

Disclosed are a method and apparatus for allowing a Software Defined Radio (SDR) terminal to perform a vertical handover between different services. The vertical handover method includes: receiving a handover request from an application service which is currently being executed; selecting a new application service which is a handover target from among a plurality of application services, in response to the handover request; installing the new application service in the SDR terminal so that the new application service is executable by the SDR terminal; and performing a handover to the new application service. Accordingly, since handover is performed seamlessly between different services, continuity of service may be ensured.

Method and apparatus for performing vertical handover in SDR terminal

Disclosed are a subscriber station authentication method, a protocol configuration method, and a device thereof in a wireless portable Internet system. In the subscriber station authentication method, an authentication mode between a subscriber station () and a base station () is negotiated, and the authentication mode is negotiated by the base station () according to the authentication mode negotiation. The authentication modes include an authentication mode based on the IEEE 802.16 privacy standard protocol and an authentication mode based on the standardized authentication protocol of the upper layer. Authentication is performed by the base station () in the case of the authentication mode based on the IEEE 802.16 privacy standard protocol, and the authentication is performed through message transmission using a diameter protocol between a base station () and an authentication server () in the case of the authentication mode based on the standardized authentication protocol of the upper layer.

Method for authenticating subscriber station, method for configuring protocol thereof, and apparatus thereof in wireless portable internet system

The present invention relates to a security association negotiation method of extensible authentication protocol (EAP) for authenticating a subscriber station user in a wireless portable Internet system. An exemplary security association negotiation method using a user authentication in a wireless portable Internet system according to an embodiment of the present invention includes following steps. A base station generates an authentication key for authenticating a user of a subscriber station. The base station receives a security association capability request message including security association capability information of the subscriber station from the subscriber station after generating the authentication key. The base station determines whether the base station is able to accept a security association capability of the subscriber station included in the security association capability request message. The base station transmits a security association capability response message including the security association capability information which is selected for a security association with the subscriber station by the base station when the security association capability of the subscriber station can be accepted. According to the present invention, a subscriber authentication for EAP may be efficiently performed without an additional message after a handover.

Method for security association negotiation with extensible authentication protocol in wireless portable internet system

The present invention relates to a vertical handoff method. According to the present invention, a serving network of a mobile station is determined. Herein, the mobile station that can access a first network having relatively wide service coverage and a second network having relatively narrow service coverage in an area where service coverages of heterogeneous networks are overlapped. When accessing the serving network of the first network, it is determined whether a received signal strength received from the second network is greater than a first threshold value. In addition, a first vertical handoff is decided by using a result of prediction of a transition pattern of the received signal strength that is greater than the first threshold value. When the serving network is the second network, it is determined whether the received signal strength received from the second network is less than a second threshold value. By using a result of prediction of a transition pattern of the received signal strength that is less than the second threshold value, a second vertical handoff is decided. Herein, the first threshold value is greater than the second threshold value.

Method of vertical handoff

The present invention relates to a method of transmitting data in a handover between base stations. When a mobile terminal performs a handover between base stations in a wireless communication system, a gateway transmits data traffic to be transmitted to a mobile terminal by using an IGMP (Internet Group Management Protocol) to a serving base station being serviced to the mobile terminal and a target base station to which a handover of the mobile terminal is made in a bi-casting method. Accordingly, when the mobile terminal performs the handover between the base stations, the gateway transmits the data traffic in the bi-casting method. As a result, it is possible to efficiently use a resource of a user plane connection interval between the gateway and the base station, thereby minimizing the loss of data traffic transmitted in a downlink, that is, data.

Method of transmitting data in handover between base stations in wireless communication system

Provided is a method for allocating an Internet protocol (IP) address to a mobile station in a mobile communication system. The method includes the steps of: a) receiving an 'Activate Packet Data Protocol (PDP) request' message including router solicitation from the mobile station; b) acquiring a global IP address of the mobile station by performing the router solicitation and a router advertisement procedure instead of the mobile station; and c) loading the acquired global IP address in an 'Activate PDP context Accept' message and transferring the &#x201c;Activate PDP context Accept&#x201d; message to the mobile station.

Method for allocating IP address to mobile station in mobile communication system

In the method for dynamic IP allocation using a mobile IP in a wireless portable Internet system, a MAC message used to register a mobile subscriber station contains a flag including a mobile IP version parameter. Upon checking the mobile IP version, the mobile subscriber terminal transmits a mobile IP registration request message to a base station during MAC connection establishment. The base station transmits a mobile IP registration reply message to the mobile subscriber in response to the received mobile IP registration request message to allocate a dynamic IP address to the mobile subscriber station. The dynamic IP allocation process is performed through a secondary management connection to achieve a rapid handoff without using a connection identifier. In addition, the present invention supports a seamless service and the use of the mobile IP in the IEEE 802.16e wireless

Method for dynamic address allocation using mobile IP in wireless portable Internet system

In a bandwidth allocation method and/or apparatus for adaptively allocating radio channels in a mobile communication system, a token bucket is periodically filled with an amount of tokens that corresponds to a requested amount of bandwidth, and a bandwidth is allocated in accordance with the amount of tokens in the token bucket. In a further bandwidth allocation method and/or apparatus for adaptively allocating radio channels in a mobile communication system, a packet classification module classifies received packets on the basis of one of an Internet Protocol address, a port, and an upper layer protocol, a packet scheduler module receives the classified packet from a buffer module for transmission to a mobile station, and a bandwidth allocation module forms the buffer module for bandwidth allocation and processes traffic services by inter-working with the packet scheduler module when the bandwidth allocation is requested.

Dynamic bandwidth allocation apparatus and method

An apparatus and method for managing QoS in an integrated network system are provided. The apparatus includes: an information provider, a condition calculator, a policy deciding unit, and a resource allocator. The information provider is for providing policy information based on a network equipment control algorithm, a user profile and network information. The condition calculator is for calculating conditions that are used for selecting a policy based on the user profile and the network information received from the information provider. The policy deciding unit is for deciding a network equipment control algorithm in accordance with the conditions, receiving the policy information corresponding to the decided network equipment control algorithm from the information provider, and requesting resource allocation. The resource allocator is for receiving the request of resource allocation from the policy deciding unit and allocating resources.

Apparatus and method for managing quality of service in integrated network of heterogeneous mobile network

In a QoS information controller and method, the QoS information controller is used in a multi-cell environment to determine the traffic characteristic, the mobile communication system characteristic, the traffic processing capacity, and the radio resource, and to control the QoS information. In addition, a QoS requested by a user may be achieved since the traffic characteristic, the mobile communication system characteristic, the traffic processing capacity, and the radio resource are determined and the QoS information is controlled to efficiently process the QoS information for the multimedia traffic in the multi-cell environment.

Growing community of inventors

Daejeon, South Korea

Yeong-Jin Kim