Abstract:
초고속 차량을 위한 통신 방법 및 장치가 개시된다. 통신 장치는 제1 이동 장치와 상기 통신 장치 간의 통신을 위한 무선 자원 제어 기능을 수행하는 프로세서, 상기 제1 이동 장치의 경로에 위치하고, 상기 프로세서의 제어에 따라 신호를 송수신하는 복수의 DA들, 및 상기 프로세서에 의해 실행되는 적어도 하나의 명령이 저장된 메모리를 포함하며, 상기 적어도 하나의 명령은 상기 복수의 DA들 중에서 상기 제1 이동 장치의 제1 위치에 대응하는 n개의 DA들을 포함하는 제1 슬라이딩 윈도우를 설정하고, 상기 n개의 DA들을 사용하여 상기 제1 위치에 위치한 상기 제1 이동 장치와 통신을 수행하도록 실행된다. 따라서 통신 시스템의 성능이 향상될 수 있다.
Abstract:
According to the present invention, a method of performing coordinated multi-point (CoMP) transmission and reception in an overlaid cellular system in which a first base station and a second base station overlay each other, comprises a step in which first and second base stations perform a handover using a CoMP transmission and reception method based on a Channel State Indicator-Reference Signal (CRS-RS) information of user equipment.
Abstract:
PURPOSE: A femto cell interference control method considering of a macro cell is provided to avoid interference for the macro cell by preventing the interference of a femto cell for the macro cell. CONSTITUTION: The reception power of a macro cell base station is measured or estimated(S110). A linear coefficient is multiplied at the transmission power of the macro cell base station(S120). In case the reception power is zero, the transmission power minimum values of a femto cell is added to multiplication result values(S130). Minimum values are acquired from addition result values and the maximum transmission power values of the femto cell. The minimum value and the minimum transmission power values of the femto cell are established as the transmission power of the femto cell(S140).
Abstract:
PURPOSE: A paging management method and system thereof for a micro home base station are provided to transfer a paging message to a home base station in a virtual tracking area where a terminal is located. CONSTITUTION: A gateway(110) for a micro base station forms a group according to the location of a macro base station. The gateway for a micro base station constitutes a virtual tracking region. The gateway for a micro base station confirms the final micro base station. The gateway for a micro base station transmits the paging message to the macro base station in a virtual tracking area.
Abstract:
PURPOSE: A downlink forward tunneling method, base station for downlink forward tunneling, and mobile communication system are provided to efficiently set up a downlink forward tunnel and to reduce time for setting up a tunnel by using X2AP protocol. CONSTITUTION: A transmitting unit(41) transmits tunnel information of a base station and a handover request to each target base station. A receiver(43) receives the tunnel information of a response about the handover request from each target base transceiver station. A tunnel processing unit(45) generates two tunnels between a serving cell and a target cell by tunnel information. Each target base station transmits tunnel information of the target base station.
Abstract:
PURPOSE: A signal interference improving method in the multi cell environment is provided to effectively improve signal interference between an adjacent cell and a home cell. CONSTITUTION: If the communication quality deterioration is generated in a serving home cell, a home gateway receives a radio resource measurement result message transmitted from user equipment(S110). The home gateway selects the adjacent cell causing interference from the received radio resource measurement result message(S120). Whether the radio resource shape of the serving home cell and same radio resource are able to assign in the selected adjacent cell or not is decided. According to the decision result, the home gateway improves the signal interference between the adjacent cell and the home cell by differencing the signal interference improvement method(S130).
Abstract:
본 발명은 교차계층 기반 핸드오버 처리 방법에 관한 것으로, 하드 핸드오버를 사용하는 이동통신 시스템에서 교차계층 기술과 이동성 예측 기술을 이용하여 신속하고 신뢰성 있는 핸드오버의 결정, 핸드오버로 인한 데이터 중단 시간의 최소화, 데이터 손실이 없는 핸드오버, 데이터 재전송이나 재정렬이 최소화된 핸드오버를 제공함으로써, 이동통신 시스템의 핸드오버 성능을 최적화하기 위한, 교차계층 기반 핸드오버 처리 방법을 제공하고자 한다. 이를 위하여, 본 발명은, 핸드오버 처리 방법에 있어서, 신호의 세기 및 라우트 추정 기반으로 소정 개수의 인접 셀들을 핸드오버 후보군으로 관리하는 핸드오버 후보군 관리단계; 보고 이벤트(reporting event)에 따라 상기 핸드오버 후보군을 담은 측정 보고 메시지를 소스 기지국으로 전송하는 측정 보고단계; 및 상기 소스 기지국으로부터의 핸드오버 명령 메시지에 따라 핸드오버를 수행하는 핸드오버 수행단계를 포함한다. 교차계층, 핸드오버 예측/결정/조정/최적화, 보고 이벤트, eNB, 3G LTE
Abstract:
A method for managing a mobility of a 3G access system using an SIP(Session Initiation Protocol) is provided to decrease a signal delay by modifying a standard SIP protocol at an application layer. A mobile terminal transmits an SIP register message to an SMA(301). The SIP register message having a new IP(Internet Protocol) address for the mobile terminal is forwarded to a home SIP register(302). The home SIP register delivers a non-authorized message to an SMA(303). The SMA(Session and Mobility Agent) forwards the non-authorized message from the home SIP register to the mobile terminal(304). The mobile terminal delivers the register message with validity information to the SMA(305). The SMA forwards the register message containing valid information to the home SIP register(306). The home SIP register delivers a success response with respect to the register message to the SMA(307). The SMA forwards the success response to the mobile terminal(308). The SMA delivers an ACK to the mobile terminal(309). An automatic address configuration is performed in the mobile terminal(310). The ACK response is delivered to the SMA(311). The SMA forwards the ACK response to the home SIP register(312).