Samsung Electronics Co., Ltd.

Kil-lyeon Kim

Sung-jin Park

Yun-Sun Baek

Byung-Gu Choe

Hyeon-mok Ko

Soo-Hwan Kim

Jae-Han Kim

A method of communication among a plurality of terminals, including transmitting, by a first terminal of the plurality of terminals, a call setup request message of the first terminal to at least one other terminal of the plurality of terminals; and establishing, by the first terminal, a session with the at least one other terminal, the at least one other terminal having received the call setup request message of the first terminal, wherein a terminal having a floor of the session is determined based on priority information regarding terminals that requested the floor from among the plurality of terminals.

Terminals and method of communication between same

A method and system of reducing handover time in a mobile IP network. An Foreign Agent (FA), when a terminal carries out a handover between mobile Internet Protocol Version-4 (IPv4) sub-networks of the Foreign Agent (FA), identifies whether or not a registration request message from the terminal is transmitted from an entry of a visitor list of the Foreign Agent (FA). If the registration request message is transmitted from the entry of the visitor list, interface information of a corresponding one of the sub-networks, to which the terminal registered in the visitor list is connected, is updated. A registration reply message is generated in response to the registration request message, and is transmitted to the terminal.

Method and system of reducing handover time in mobile IP network

Managing network information in Access Routers (ARs) includes: communicating with neighboring Access Routers (ARs) to obtain information of each of the ARs and Access Points (APs) belonging to a subnet of a relevant AR; storing the information of the ARs and APs in a database; and performing a communication network service in accordance with the information stored in the database. Desired information can be shared without a need for adding any separate element to the network architecture. In addition, because a Candidate Access Router (CAR) table is generated during the operation of the Open Shortest Path First (OSPF), the AR immediately responds to the information requested by a mobile node so as not to increase a handoff delay and so as to reduce a burden of the mobile node.

Growing community of inventors

Suwon-si, South Korea

Kil-lyeon Kim