Abstract: A method for handover according to the present invention includes: requesting information on femto cells that are accessible by the terminal from a macro base station that manages the macro cells; receiving the femto cell information from the macro base station; and scanning neighboring femto cells based on the femto cell information.

Abstract: When characters are allocated to a keyboard, a plurality of consonants are divided into a plurality of groups according to pronunciation position in the oral cavity, and the groups are allocated to corresponding columns on the keyboard of 3 rows and 10 columns. A plurality of vowels are allocated to the corresponding columns according to the pronunciation position in the oral cavity. In this instance, the consonants and the vowels of which the pronunciation position are near the lips are allocated to the middle area of the area of 3 rows and 10 columns, and the consonants and the vowels of which the pronunciation position are near the vocal chords are allocated to the outer part of the area of 3 rows and 10 columns. The consonants and the vowels are allocated to the corresponding rows of the area of 3 rows and 10 columns according to usage frequency.

Abstract: In a lawful interception system including an interception unit, an application service providing unit, and an Internet access service providing unit, the application service providing unit may receive, from the interception unit, an interception request including interception target information of an interception target. Next, the application service providing unit may transfer a user code corresponding to the received interception target information to the interception unit, and may insert user related information into a packet to be provided to the interception target corresponding to the user code, enabling the packet to be lawfully intercepted. The interception unit may request the Internet access service providing unit for an interception of the packet with respect to the interception target by including the user code.

Abstract: Disclosed is an apparatus for transmitting feedback information to a base station. The feedback information transmitting apparatus receives channel allocation information, generates a plurality of payloads regarding feedback information, and multiplexes the plurality of payloads in terms of a plurality of classes so as to generate a plurality of multiplexed payloads. Subsequently, the plurality of multiplexed payloads are code multiplexed so as to generate a code division multiplexing symbol, and a channel code is applied to the code division multiplexing symbol. Then, the code division multiplexing signal applied with the channel code is transmitted to a base station through a wireless resource. Accordingly, a feedback channel that is adaptive to a channel condition is configured, such that a wireless resource for a feedback channel can be efficiently used.

Abstract: A random access channel operating method in a mobile communication system is provided. The random access channel operating method includes: (a) selecting a transmission mode according to a load of random access channel and performing transmission to a mobile terminal; (b) receiving a message having a format corresponding to the selected transmission mode from the mobile terminal; (c) determining whether or not a preamble or data is included in the message received in (b) receiving of the message; and (d) if the data is determined to be included in the (c) determining, transmitting a response message for data reception to the mobile terminal. Accordingly, use efficiency of a random access channel can be increased by measuring a system load of the random access channel in a base station and changing a transmission format of a burst transmitted through the random access channel according to the measured load level.

Abstract: A lawful interception apparatus, a lawful interception target apparatus and a lawful interception system are provided. If a lawful interception target apparatus accesses a new communication network which has no lawful interception authority, the lawful interception apparatus receives intercept activation information from the lawful interception target apparatus through a communication network which has a lawful interception authority. The lawful interception apparatus performs seamless lawful interception on the lawful interception target apparatus by use of the received intercept activation information.

Abstract: A lawful interception apparatus of a service providing system inquires of a trust server in which a law execution server commissions lawful interception authority whether a terminal that connects to a service connection point is an interception target, determines whether a terminal that connects to a service connection point is an interception target, and if a terminal that connects to a service connection point is an interception target, and the lawful interception apparatus intercepts communication traffic that is related to the terminal.

Abstract: The present invention relates to an interworking device for interworking with a first network and exchanging data between a second network and a terminal device. The interworking device establishes a first wireless data path with the first network, and receives a first network address from an address allocation server of the first network through the first wireless data path. In addition, the interworking device establishes a second wireless data path with the terminal device, receives a second network address from an address allocation server of the second network through the second wireless data path, and transmits the second network address to the terminal device. Subsequently, the interworking device establishes a tunnel that passes through the first network and is accessed to the second network, and exchanges data with the second network.

Abstract: Disclosed is a method of detecting signals at a receiver of a communication system with a multiple input multiple output antenna. With the signal detection method, a square of the distance between a received signal vector and a channel status-considered transmission symbol vector is calculated first, and the square of the distance is then classified into first and second components. The first component is minimized to calculate a plurality of first soft symbol estimates. A solution set of the first component is calculated on the basis of the plurality of first soft symbol estimates. The second component is minimized to calculate a plurality of second soft symbol estimates. A solution set of the second component is calculated on the basis of the plurality of second soft symbol estimates. A final solution set is calculated by doing the sum of the first component solution set and the second component solution.

Abstract: Provided are an electronic surveillance system and a method thereof. In the electronic surveillance system that performs electronic surveillance on a subscriber in a communication network, the electronic surveillance system includes: one or more communication service providers that provide retained data, which is information generated while the subscriber uses a communication service; a dedicated storage that stores and manages the retained data provided by the communication service providers; and a law enforcement agency that requests the dedicated storage to send electronic surveillance information on a specific subscriber so as to be provided with the surveillance information when the electronic surveillance information on the specific subscriber is required. Accordingly, retained data, which is subscriber electronic surveillance information is integrally managed and stored in a dedicated storage.

Abstract: 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 (10) and a base station (20) is negotiated, and the authentication mode is negotiated by the base station (20) 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 (10) 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 (10) and an authentication server (40) in the case of the authentication mode based on the standardized authentication protocol of the upper layer.

Abstract: To transmit resource allocation information on a plurality of radio resources to a terminal, a resource allocation device expresses a radio resource that is differently allocated from before the resource allocation information is transmitted among the plurality of radio resources in a radio resource pattern sequence, generates resource allocation information on the plurality of radio resources based on the radio resource pattern sequence, and transmits the radio resource pattern sequence and the resource allocation information, or a compressed pattern sequence corresponding to the radio resource pattern sequence and the resource allocation information, to the terminal through a frame.

Abstract: The present invention relates to a transmission symbol detection method in a multiple antenna system. In the present invention, when a channel matrix is estimated through channel estimation, a receiving side calculates a Q matrix and an R matrix through QR decomposition that is more simplified than a typical QR decomposition from an augmented channel matrix that includes the estimated channel matrix. In addition, the receiving side detects symbols having the minimum Euclidean metric by using the two matrixes, as transmission symbols.

Abstract: A method and device for providing reference information for starting scanning a different radio access network to a terminal in a boundary area is provided. A receiver supporting a plurality of access systems includes a receiving circuit for receiving a scanning threshold from a transmitter, a first measuring module for measuring channel quality of a serving cell, and a second measuring module for starting scanning a neighboring cell that is a different radio access network when channel quality of the serving cell is less than the channel quality threshold. The receiver may further include a handover module for performing handover to the neighboring cell when the channel quality of the neighboring cell measured by the second measuring module is greater than that of the serving cell.

Abstract: A synchronization method of a radio repeater includes: using a first signal, a second signal, and a received signal including the first signal and the second signal to calculate correlation values of the first signal and the second signal; using the first signal correlation value, the second signal correlation value, and the power value of the received signal to output normalized correlation values; subtracting the normalized correlation value of the first signal and the normalized correlation value of the second signal; and detecting a start interval of the second signal based on the subtraction result and outputting a synchronization signal to synchronize the radio repeater.

Abstract: The present invention relates to a device for interworking a wireless local area network (WLAN) and a portable Internet. The device establishes a first wireless data path following a first wireless communication protocol with a first network, and establishes a plurality of the second wireless data paths through the first wireless data paths. Here, the plurality of the second wireless data paths follow a second wireless communication protocol and respectively correspond to a plurality of terminal devices. Subsequently, the device establishes a plurality of first network links respectively corresponding to the plurality of terminal devices with the first network, and stores mapping information for the first network link corresponding to a relationship between the plurality of terminal devices and the plurality of first network links.

Abstract: Disclosed is an interworking device for interworking with a first network and supporting signaling between a terminal and a second network. The interworking device sets a first wireless data path with the first network. The interworking device sets a first radio link with the terminal, receives an authentication message through a first radio link, and transmits the authentication message to an authentication server of the second network through the first wireless data path. When the authentication server finishes authentication, the interworking device sets a second wireless data path with the terminal. Accordingly, the interworking device provides an Internet service to the terminal during movement.

Abstract: In order to manage a neighbor list of neighboring base stations based on the location of a terminal communicating with a base station of a macrocell with femtocell deployments, the base station divides the macrocell in accordance with a predetermined standard of division, and generates a mobile neighbor advertisement message so as to periodically transmit the generated message to the terminal. At this time, the terminal identifies the current location thereof in the macrocell upon receipt of the pilot signals periodically transmitted from the base station of the macrocell. The terminal obtains information regarding the location of the terminal from the information regarding the femtocells deployed within the respective divided regions and information regarding macrocells neighboring the macrocell through using the mobile neighbor advertisement message to scan base stations.

Abstract: The present invention relates to an uplink framing method and apparatus in a mobile communication system. After a mobile terminal and a base station are connected to each other in a wireless manner, the base station allocates an uplink radio resource to a medium access control (MAC) layer of the mobile terminal, and then scheduling is performed for each connection in a buffer. Next, a packet data unit (PDU) is generated to satisfy the uplink time constraint and then transmitted to the base station. Therefore, hardware implementation complexity can be minimized in a mobile communication system that should support fast data transmission, and at the same time, a required uplink framing time can be minimized in a system that supports a short frame period.

Abstract: The present invention relates to a data processing method and system for checking an interactive communication sequence (ICS) relating to a plurality of users in a communication record by using a variable time window, and checking an interactive communication sequence pattern (ICSP) that is a frequently generated interactive communication sequence from among the checked interactive communication sequences.