Abstract:
PURPOSE: A data transmission method of a wireless communication system including a relay is provided to effectively transmit and receive data between the relay and a base station. CONSTITUTION: Two or more backhaul uplink sub-frames are successively arranged. A relay(210) transmits the backhaul uplink frame to a base station(110). A protection section in which one of the backhaul uplink sub-frames touches other backhaul uplink sub-frame is replaced to a backhaul uplink signal section. The backhaul uplink sub-frame is adaptively constructed. A backhaul uplink transmission process is executed by using the backhaul uplink sub-frame. [Reference numerals] (110) Base station; (210) Relay; (310) Base station terminal; (320) Relay terminal; (AA) Base station access downlink; (BB) Base station access uplink; (CC) Backhaul downlink; (DD) Backhaul uplink; (EE) Relay access downlink; (FF) Relay access uplink
Abstract:
PURPOSE: A method for transmitting and receiving a control channel in a wireless communication system is provided to produce various methods for providing start location information of a data channel using an allocation information control channel. CONSTITUTION: A data channel is allocated to a wireless resource. Start location information of the data channel is included in a payload of the control channel. Indication information about the start location information included in the payload of the control channel is signaled. The payload of the control channel includes the start location information of the data channel. A bit region for the start location information is defined in the payload. The start location information is included in the bit region. A step of including the start location information of the data channel in the payload of the control channel comprises a step of including the start location information in the bit region which is not used among the bit regions of the payload. [Reference numerals] (AA) Frequency; (BB) Time; (CC) eCCE #2; (DD) eCCE #1; (EE) eCCE #0; (FF) Downlink modulation signal; (GG) Downlink cell reference signal; (HH) Downlink physical control channel
Abstract:
PURPOSE: A direct communication between terminals and relaying method thereof are provided to conduct direct communication and relaying processes between proximity terminals by grasping other terminals near D2D(Device to Device) communication terminals. CONSTITUTION: A first terminal requests D2D connecting establishment for a second terminal to a network through a normal way(S310). Serving cell base stations determine whether D2D communication is conducted between two terminals(S320). When the D2D communication is available, the base station establishes D2D connecting between the two terminals according to the instruction of the network(S330). Proximity between the base station and the first or the second terminal is grasped(S340). The proximity between proxy terminals and the first of the second terminal is grasped. The base station allocates wireless resources according to the request of the terminal(S350).
Abstract:
PURPOSE: In the multimedia broadcast multicast service, by using the down link-control channel the error packet retransmission scheme about the request for retransmission information transfer method of the error packet and request for retransmission transmit the specify information. CONSTITUTION: The MBMS packet(305) is received from the base station. In the received MBMS packet as described above, the presence of error is identified. The request for retransmission information about the error packet is transmited by at least using one among the PUSCH(Physical Uplink Shared Channel), and the random access preamble for the PUCCH(Physical Uplink Control Channel) and random access procedure.
Abstract:
PURPOSE: A random joint system using multi carrier structure in a mobile communication system is provided to quickly process a random joint by a terminal. CONSTITUTION: A preamble transmission unit(610) transmits a first preamble to a base station by the uplink carrier. Using the first downlink carrier selected in response to the first preamble between plural downlink carriers, a receiver(620) receives the information toward the first radio resource of the uplink carrier. A data transmission unit(630) transmits the first uplink data to the base station by first radio resource. The base station receives a second uplink data from a second terminal by second radio resource.
Abstract:
PURPOSE: A system for transmitting a channel state information reference signal is provided to easily transmit a channel state information reference signal to transmit data between a base station and the relay. CONSTITUTION: A base station(900) includes a channel state information reference signal pattern information transmitting unit(910) and a transmitting unit(920). The channel state information reference signal pattern information transmitting unit transmits information about a sub frame including a channel state information reference signal among sub frames to a terminal(930) or a relay(940). The transmitting unit transmits the channel state information reference signal and data to the terminal or the relay by referring to the information for the sub frame.
Abstract:
PURPOSE: A method and an apparatus for transmitting reception success information for allocating PHICH without the collision of wireless resource are provided to perform cyclic shift of the reference signal according to wireless link control information. CONSTITUTION: Information is received from a base station about reference signal(S331). For the dynamic loop cloth, the circulation cloth about the reference signal is on a one-to-one basis mapped with the information. A DMRS field in DCI format which is cyclically shifted with a cyclic shift value determined based on the dynamic cyclic shift value to the base station. The acknowledge information of transmitted-data is received through radio resources of a downlink channel identified based on a modifier which is mapped to cyclic shift for DMRS field in DCI format of the downlink channel in which the circulation.
Abstract:
PURPOSE: An apparatus and a method for estimating noise variance in wireless multi-carrier communication systems are provided to reduce the complexity of implementation by presuming the noise variance based on the second noise variance through the frequency area signal difference sample. CONSTITUTION: A receiver(101) receives the carrier signal including the reference signal sequence of the multiple transmitting antenna. A first noise variance extracting unit(103) calculates the first noise variance of the time domain about the received carrier signal as described above. The second noise variance extracting unit(109) calculates the second noise variance of the frequency domain about the received carrier signal as described above. The noise variance selecting unit(115) selects the first or the second noise variance. The first noise variance extracting unit comprises a first dispersion calculator obtaining the dispersion of signal difference samples of the first sample extraction unit calculating the signal difference sample of domain in the time-frequency assignment and RX-antenna of the received carrier signal as described above.
Abstract:
OFDMA 시스템에서 사용자간 시공간 블록 부호화와 순환 지연 다이버시티를 동시 사용하는 기지국 및 단말기가 개시된다. OFDMA 시스템에서 사용자간 시공간 블록 부호화와 순환 지연 다이버시티를 동시 사용하는 기지국은 데이터 전송을 원하는 복수의 사용자 단말 각각에 관한 채널의 주파수 선택적 특성에 따라 상기 사용자 단말 각각에 적합한 송신 다이버시티 방안을 결정하는 다이버시티 결정부, 상기 사용자 단말 각각으로 상기 결정된 송신 다이버시티 방안을 지시하는 다이버시티 지시부 및 상기 사용자 단말로부터 상기 송신 다이버시티 방안에 따라 상기 데이터를 수신하는 데이터 수신부를 포함한다. 다이버시티, 시공간 블록 부호화, 순환 지연 다이버시티, STBC, CDD, MIMO, OFDMA, 상향링크
Abstract:
A relay network and entity capable of successive continuous transmission by using overlapped coding in order to reduce a transmission delay according to the relay use are provided to reduce transmission delay according to the relay use by transmitting data without time division between a base station-relay link and relay-terminal link. A base station(410) reuses a resource allocated to a direct transmission link in the transmission of the base station through an overlapped coding mode. A relay(420) is allocated the resources allocated in the base station and the other separate resources in the transmission of the relay-terminal link. A channel characteristics is maintained in the transmission of the relay-terminal link. The base station-relay link transmits the relay without allocating the resource.