Abstract:
PURPOSE: A device and method for proving a mobile IP television service in a mobile communication system and broadcasting system thereof are provided to minimize a unicast transmission rate. CONSTITUTION: An ABS periodically broadcasts a buffering data packet corresponding to buffering capacity about broadcast buffering content(313). The request for provision of content channel is received from an AMS(315). The requested content channel is a content channel which reproduces broadcast buffering content(317). The ABS transmits a residual data packet to the AMS(321).
Abstract:
본 발명은, 통신 시스템에서 적어도 2개의 안테나를 사용하는 사용자 단말이 피드백 정보를 송신하는 방법 및 장치에 관한 것으로, 상기 방법은, 하향링크 멀티캐스트 송신 채널을 통해서 기지국으로부터 데이터 패킷을 수신하는 과정과, 상기 데이터 패킷을 디코딩하고, 상기 데이터 패킷의 디코딩 성공 여부를 확인하는 과정과, 상기 확인 결과 상기 데이터 패킷의 디코딩이 실패한 경우, 상기 데이터 패킷의 디코딩의 실패를 나타내는 NACK 신호를 상기 안테나 개수와 동일한 개수의 수열들을 사용하여 생성하는 과정과, 상기 NACK 신호를 공용 피드백 채널을 통해서 상기 기지국으로 송신하는 과정을 포함하며 상기 생성된 수열들 각각은 서로간에 직교성을 갖고, 시퀀스 신호를 포함한다. 직교 수열, 공용 피드백 채널, 멀티캐스트, MBMS
Abstract:
PURPOSE: A method and a device for transmitting feedback information in a communication system including a user terminal having a various numbers of antennas are provided to effectively detect feedback information of corresponding user terminal without considering the number of antenna of a user terminal, thereby implementing effective frequency management on whole. CONSTITUTION: Multicast data packet is received from a base station(210) through downlink multicast transmission channel. If the multicast data packet is a multicast data packet which does not have an experience of succeeding a decoding in previous time, the multicast data packet is decoded and whether decoding of multicast data packet is succeeded or not is checked. A NACK signal is transmitted to base station through a common feedback channel. If a user terminal itself has at least two antennas, series which being corresponded to the antennas has orthogonality to each other.
Abstract:
본 발명은 하이브리드 자동 반복 요구(Hybrid Automatic Repeat reQuest: HARQ) 방식을 지원하는 디바이스간 직접 통신(Device to Device: D2D) 무선 통신 시스템에서 기지국의 멀티캐스트 서비스 제공 방법에 있어서, 멀티캐스트 서비스 그룹에 포함되어 있는 이동 단말기들이 사용할 자동 재전송 횟수와, 멀티캐스트 서비스 데이터 패킷을 멀티캐스트하는 과정을 포함하며, 상기 자동 재전송 횟수는 상기 멀티캐스트 서비스 그룹에 포함되어 있는 이동 단말기들이 상기 멀티캐스트 서비스 데이터 패킷을 성공적으로 수신하였을 경우, 상기 멀티캐스트 서비스 데이터 패킷을 자동적으로 재전송하는 횟수를 나타냄을 특징으로 한다.
Abstract:
A resource allocation method for a multicast service in a wireless communication system includes the steps of: calculating each reference value of groups composed of terminals providing the multicast service by using the total number of terminals constituting the corresponding group and a weight for the minimum transmission rate of each terminal; and allocating the resource based on the calculated reference value of each group.
Abstract:
PURPOSE: A control channel scheduling method and an apparatus thereof in an SDMA(Spatial Division Multiple Access) mobile communication system are provided to determine the combination of the number of CCEs as a scheduling target and to allocate a resource which terminals request. CONSTITUTION: A sub-group member selecting unit(615) performs sub-group operations. A CCE(Control Channel Element) number calculating unit(620) calculates the number of CCEs through a sub-group process. A control unit(605) determines the number of the calculated CCE as a scheduling target. The control unit allocates a resource which terminals request. [Reference numerals] (605) Control unit; (610) Group member selecting unit; (615) Sub-group member selecting unit; (620) CCE(Control Channel Element) number calculating unit
Abstract:
PURPOSE: A base station, mobile station, and operation method thereof are provided to offer synchronization information by effectively synchronizing a relay candidate mobile station with a mobile station which requests an emergency call. CONSTITUTION: A base station(200) recognizes an emergency situation of a neighbor base station. The base station broadcasts the emergency situation notification information of the neighbor base station to one or more mobile stations(300) within service coverage. The base station broadcasts location calculation information. The location of the mobile station is calculated based on the location calculation information. In case the mobile station is located a cell edge of a neighbor base station direction, the mobile station broadcasts an emergency situation preamble.