Electronics and Telecommunications Research Institute

No Ik Park

Yoo Hwa Kang

Changki Kim

Dongmyoung Kim

Jae Ho Kim

Nam Seok Ko

Soon Seok Lee

Moon Kyun Oh

Sun Mi Jun

Sung Hyun Yun

Kyung Jun Park

Yong Mun Park

A method for releasing a context of a user equipment in a non-3GPP access network and a network entity performing the same are disclosed. In a case in which the UE is a unreachable state, a non-3GPP interworking function (N3IWF) may a UE context release request message to an access and mobility management function (AMF), and may perform protocol data unit (PDU) session user plane de-activation between the AMF, a session management function (SMF), and a user plane function (UPF). In addition, the AMF may transmit a UE context release command message to the N3IWF, and the N3IWF may transmit a UE context release complete message to the AMF.

Method for releasing context of user equipment in non-3GPP access network and network entity performing the same

A traffic mobility method between heterogeneous access networks of a wireless communication system includes, as a user equipment (UE) multiply accesses a first access network and a second access network, configuring a first transmission path corresponding to the first access network and a second transmission path corresponding to the second access network with respect to the UE, by a gateway, determining whether traffic mobility is performed on each traffic flow based on a traffic mobility policy of the each traffic flow served to the UE through the first transmission path and a transmission state of the second access network, by a control entity, and changing a transmission path of a traffic flow on which traffic mobility is determined, to the second transmission path from the first transmission path, by the gateway.

Method and wireless communication system for traffic mobility between heterogeneous access networks

A deregistration method of user equipment in a network and user equipment performing the same is disclosed. The user equipment determines whether the user equipment is in a connection management (CM)_CONNECTED state in a non-3GPP access network and initiates a deregistration procedure through the non-3GPP access network if the user equipment is in the CM_CONNECTED state in the non-3GPP access network.

Deregistration method of user equipment in network and user equipment performing the same

A non-access stratum based access method and a terminal supporting the same. The terminal receives an Internet protocol (IP) address allocated from a first gateway included in a non-3generation partnership project (3GPP) access network. In addition, the terminal applies a non-access stratum (NAS) protocol to a first device managing mobility of the terminal through the IP address.

Non-access stratum based access method and terminal supporting the same

There is provided a converged access control method using a network access device at an edge node of an IP network of a convergence ALL-IP network that performs authentication control, QoS control, traffic control and mobility control in a consistent manner using a network access device located at penetration nodes of an IP network of a convergence ALL-IP network to effectively accommodate a subscriber network in various access environments, thereby ensuring network flexibility and scalability.

Converged access control method using network access device at penetration node of IP network of convergence ALL-IP network

Provided are an apparatus and method for modeling and analyzing a network simulation for a salable simulation framework (SSF)-based network simulation package. A system logic set is generated and a network simulation modeling suitable for a predetermined network application is formed according to the system logic set. The network simulation modeling is transmitted to a predetermined network simulation package that performs simulation. Statistical information is generated based on the result according to the system logic set. Complicated network simulation modeling errors can be minimized, and remodeling of the network simulation modeling can be reduced.

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Daejeon, South Korea

No Ik Park