Abstract: An apparatus and a method for simplifying a connection process with an Access Point (AP) in a mobile terminal are provided. More particularly, an apparatus and a method for simplifying a connection process with a peripheral apparatus by registering in advance information regarding the peripheral apparatus that performs an AP function to search for only the registered peripheral apparatus, and for performing a security access to the peripheral apparatus without a separate operation in a mobile terminal are provided. The mobile terminal includes an AP searching unit. The AP searching unit stores and registers information regarding APs to be connected, and searches for only the registered APs to perform a security access.

Abstract: An apparatus and a method for Peer-to-Peer (P2P) connection using a wireless Local Area Network (LAN) in a mobile communication terminal are provided. The method includes detecting a P2P connection attempt of a new terminal not connected to P2P communication, during P2P communication with at least one terminal, determining whether the mobile communication terminal operates as a slave terminal or a group owner in the P2P connection, and when the mobile communication terminal operates as the slave terminal, transmitting a signal indicating that the P2P connection attempt of the new terminal is detected, to a terminal operating as the group owner in the P2P connection.

Abstract: An apparatus and method for providing an Access Point (AP) function of a portable terminal are provided. The apparatus includes an AP function unit for performing the AP function by using the portable terminal in an environment where an AP is not present, and a controller for, if there is a terminal to be connected to the AP, performing connection to the terminal directly without having to perform a process of inputting password information of the AP.

Abstract: A method and an apparatus for connecting a portable terminal to a Wireless Local Area Network (WLAN) are provided. The method includes when a WLAN connection event occurs, performing a WLAN connection procedure by keeping a WLAN module in an awake state, and when the WLAN connection is complete, operating the WLAN module according to a Power Save Mechanism (PSM).

Abstract: A method and an apparatus for managing power of a Wireless Local Area Network (WLAN) module in a portable terminal are provided. In the method, the WLAN module is operated according to a Power Save Mechanism (PSM). Whether the portable terminal operates in a sleep state is determined. At least one of a beacon interval and a Delivery Traffic Indication Map (DTIM) interval of the PSM is changed depending on whether the portable terminal operates in the sleep state.

Abstract: An apparatus and method for decreasing the number of bearer connections by transmitting a data packet in order to determine a network connection status at a time of bearer connection necessarily performed by a portable terminal together with a location registration message. Reduced battery consumption in the portable terminal is achieved because of the reduced number of bearer connections. The apparatus includes a transmission time determination unit for reconfiguring a data packet transmission time to a time of bearer connection necessarily performed by the portable terminal when a data packet is transmitted to determine the network connection status, and a controller for providing control to transmit the data packet is transmitted while connecting the bearer at the reconfigured data packet transmission time, wherein the reconfigured data packet transmission time may be advanced or delayed of the initial transmission time.

Abstract: An apparatus and method for setting a plurality of Internet Protocol (IP) address in a mobile communication system are provided. A method for using the plurality of IP addresses at a dual-mode terminal in the mobile communication system comprises determining whether a socket open is requested from an application program, when the socket open is requested, determining whether the application program is for a trusted-only network, when the application program is for the trusted-only network, selecting an access means from a plurality of access means for the trusted-only network, determining a corresponding IP address from a plurality of IP addresses using the selected access means, and binding a socket using the determined IP address.

Abstract: An apparatus and method for sharing assistance data between an Assisted Global Positioning System (A-GPS) terminal and a Global Positioning System (GPS) terminal are provided. The method includes establishing a connection with an A-GPS terminal, transmitting an assistance data request message to the A-GPS terminal, receiving an assistance data response message including assistance data from the A-GPS terminal, and performing position determination by using the assistance data and GPS position information received from a GPS artificial satellite. Accordingly, position determination can be achieved faster.

Abstract: An apparatus and a method for processing high speed data using hybrid Direct Memory Access (DMA) are provided. The method includes determining a size of data to be transmitted, determining a memory access method of the data by comparing the determined size of the data with a first threshold, and determining an I/O bus access method of the data by comparing the determined size of the data with a second threshold.

Abstract: An apparatus and a method for synchronizing a Security Association (SA) state as SA information of a mobile communication terminal is lost are provided. In the method, an IPSec tunnel is established by performing an SA procedure with a server, and a secure port is obtained. A service request message is transmitted to the server via the obtained secure port, and an unsecure port is opened. When a service response message is received from the server, it is determined whether the service response message is received via the unsecure port. When the service response message is received via the unsecure port, the SA procedure is re-performed. Therefore, the terminal may use a service through a secure network without interruption, and reduce a waste of resources by avoiding unnecessary retransmission of a message for requesting a service.

Abstract: A communication apparatus and method for a dual-mode mobile terminal provides supporting communications through a wireless local area network and a cellular network, simultaneously. The communication apparatus includes a first communication unit for supporting a wireless local area network communication; a second communication unit for supporting a cellular communication; and a control unit for controlling the second communication unit to set up a media session with another terminal and for controlling the first communication unit to retrieve a preferred channel among a plurality of channels provided by an Access Point.

Abstract: A method and apparatus for connection an emergency call in a dual mode portable terminal supporting both a cellular network and an unlicensed-band network using an unlicensed Industrial, Science, and Medical (ISM) frequency band (e.g., WiFi, Bluetooth, UWB, etc.) are provided. The method includes if an emergency call connection event occurs, searching for an accessible network and checking an insertion state of a SIM card; if the unlicensed-band network is accessible and the SIM card is not inserted, performing an IP-based Multimedia Subsystem (IMS) registration process by using information pre-stored in a memory; and connecting the emergency call through the unlicensed-band network.

Abstract: An apparatus and method for deciding a handover in a dual mode portable terminal supporting a cellular network and an unlicensed ISM (Industrial, Scientific and Medical) band network based on a Carrier Sensing Multiple Access with Collision Avoidance (CSMA/CA) scheme is provided. The method includes checking for an available throughput of an Access Point (AP) by analyzing a signal received from the AP of the unlicensed-band network while using the cellular network; determining whether the AP can provide a service provided through the cellular network by using the available throughput of the AP; and if it is determined that the AP can provide the service, deciding whether to handover to the AP by measuring a strength of the received signal.

Abstract: Provided is an apparatus and method for saving power in a dual mode portable terminal that concurrently supports a cellular network and an unlicensed band network. The method includes, upon disassociating from an in-association Access Point (AP) of an unlicensed band network, measuring a Received Signal Strength Indicator (RSSI) from the AP during a predetermined time and calculating an average value of the RSSI; and comparing the calculated average value with a predetermined threshold value and deciding whether to perform a mode conversion between a low power mode and a general mode.

Abstract: Provided is an Internet Protocol (IP) Multimedia Subsystem (IMS) service apparatus and method in a mobile terminal. The method includes registering the mobile terminal to an IMS server over a mobile communication network, checking whether an invite request message is for requesting an IMS service requiring a connection with a wireless Local Area Network (LAN), supplying power to a wireless LAN communication unit, attempting a connection with a wireless LAN Access Point (AP) via the wireless LAN communication unit supplied with power, generating an invite response message including information on the wireless LAN AP, and sending the invite response message to a terminal, which has sent the invite request message, over the wireless LAN.

Abstract: Provided are a power saving control apparatus and method for a portable terminal. The apparatus includes a telephone communicator communicating with a base station (BS) to receive access point (AP) nearest BS (AnB) information from the BS; a wireless LAN communicator communicating with an AP, wherein if a mode setting event occurs, a mode determiner determines a power mode of the wireless LAN communicator depending on whether the wireless LAN communicator is accessing the AP, the telephone communicator is accessing the BS, and an AP the wireless LAN communicator is capable of accessing is positioned within a cell coverage area of the BS during the access to the BS; a power supply unit for the wireless LAN communicator; and a power manager controlling the power supply unit according to the power mode determined by the mode determiner.

Abstract: The present invention relates to a mobile communication terminal having a wireless LAN module. The wireless LAN module checks if used channel information exists. A mobile communication module transmits an idle channel information list. A channel list manager transmits the idle channel information list using the used channel information checked by the wireless LAN module, receives channel information selected from a receiving terminal, and sets the channel.

Abstract: The present invention relates to a directional flooding method in a wireless sensor network. Transfer of a packet between respective sensor nodes and a sink node in a wireless sensor network is made with the directivity. To this end, when the packet is transmitted from the sensor nodes to the sink node, only the sensor nodes having a minimum hop count for the sink node are involved in transmission of the packet. Meanwhile, if the packet is sent from the sink node to the sensor nodes within a given destination area, after the packet reaches a corresponding destination area, only sensor nodes located within the destination area transmit the packet. The present invention has an effect that it can improve energy consumed on average and a total number of packets transmitted when transmitting the packets in a wireless sensor network compared to a conventional simple flooding method.

Abstract: A method for enhanced power saving on DCF based wireless networks is disclosed. The method divides a beacon transmitting section in an Announcement Traffic Indication Message (hereinafter, referred to as “ATIM”) window period defined by IEEE standard 802.11 according as there is a data packet to be sent or not and allows a terminal that has received the beacon to go to a doze state immediately according to beacon reception timing, thereby preventing unnecessary power consumption.

Abstract: A method for power saving routing in wireless networks is disclosed. The present invention calculates a distance to a destination node to select and estimate candidate nodes so as to reduce the amount of calculations in the event of routing. Furthermore, the invention repeats the algorithm by optimum value n so that accessibility to the destination node can be obtained. This enables more efficient routing.