摘要:
Data retransmission apparatus and method in a wireless relay communication system are provided. It is checked whether an Acknowledgement (ACK) message or a Negative ACK (NACK) message for data is received from a Relay Station (RS), which receives the data from a Mobile Station (MS). Scheduling information for transmitting the data is transmitted to the RS, when the ACK message is received from the RS. Errors are checked for in of the data, when the data is received from the RS. The RS is requested to retransmit the data, when the data has an error. Accordingly, since the RS retransmits only the error-free data to the BS, the BS can enhance the data reliability.
摘要:
An apparatus and method for Automatic Repeat reQuest (ARQ) feedback polling in a wireless communication system are provided. The method for ARQ feedback polling includes transmitting at least one ARQ block to a receive end, polling ARQ feedback to the receive end using an extended header, determining if ARQ feedback information is received from the receive end within a lifetime of ARQ feedback, determining success or failure of transmission of the at least one ARQ block through the ARQ feedback information if it is determined that the ARQ feedback information is received within the lifetime of ARQ feedback, and polling ARQ feedback again to the receive end if it is determined that the ARQ feedback information is not received within the lifetime of ARQ feedback.
摘要:
Provided is an apparatus and method for providing a synchronous relay service in a multi-hop relay BWA communication system. In the method, a BS-MS link subframe and an RS-MS link subframe are configured for a first section of a subframe in an ith frame. At least one of a BS-RS link subframe, an RS-RS link subframe and an RS-MS link subframe is configured for a second section of a subframe in the ith frame. The BS-MS link subframe and the RS-MS link subframe are configured for a first section of a subframe in an (i+1)th frame. At least one of the BS-RS link subframe, the RS-RS link subframe and the RS-MS link subframe is configured for a second section of a subframe in the (i+1)th frame.
摘要:
A multihop relay wireless communication system is provided. A Base Station (BS) includes a calculator for calculating an ACKnowledge (ACK)/Non ACK (NACK) transmission time of at least one Relay Station (RS) using retransmission parameter values, and a transmitter for transmitting the ACK/NACK transmission time information to the at least one RS.
摘要:
An apparatus and method for generating a Media Access Control (MAC) Protocol Data Unit (MPDU) in a wireless communication system are provided. The method includes reconstructing at least one MAC Service Data Unit (MSDU) according to scheduling information of the MAC layer and generating at least one MPDU data portion, adding control information to each MPDU data portion and generating at least one MPDU payload, adding a General MAC Header (GMH) to each MPDU payload and generating at least one MPDU, and transmitting the MPDU to a receive end. The control information includes at least one piece of MSDU information constituting each MPDU data portion. The GMH includes length information on the MPDU and Connection IDentifier (CID) information.
摘要:
A method and apparatus for transmitting and receiving control information in a wireless communication system are provided. The apparatus includes a DownLink/UpLink (DL/UL) indicator for indicating whether a connection associated with control information to be transmitted is a DL connection or a UL connection and a flow Identification (ID) that identifies the connection are generated and control information including the DL/UL indicator and the flow ID is transmitted to another party to the connection.
摘要:
An apparatus and a method for transmitting ACKnowledge (ACK) channels by a Relay Station (RS) in a wireless communication system are provided. The method includes, when receiving one or more ACK information from one or more lower nodes, checking ACK channel constitution information provided from an upper node, arranging one or more ACK channels to transmit corresponding ACK information according to the ACK channel constitution information by distinguishing ACK information of one or more data scheduled by the upper node and ACK information of one or more retransmission data not scheduled by the upper node, and transmitting the one or more ACK information to the upper node in the arranged ACK channels.
摘要:
An apparatus and a method for generating an Automatic Repeat reQuest (ARQ) feedback message in a wireless communication system are provided. A method for generating an ARQ feedback message at a receiving end in a wireless communication system includes, generating first ARQ feedback information of a first scheme, the first ARQ feedback information comprising information of a first erroneous ARQ block of one or more ARQ blocks for which the ARQ feedback is not performed, generating second ARQ feedback information of a second scheme indicative of error of at least one ARQ block not represented in the first ARQ feedback information, generating an ARQ feedback message comprising the first ARQ feedback information and the second ARQ feedback information, and transmitting the ARQ feedback message to a transmitting end.
摘要:
An apparatus and a method for Automatic Repeat reQuest (ARQ) feedback in a wireless communication system are provided. A method for the ARQ feedback at a receiving end includes when receiving an ARQ block from the transmitting end, checking for error in the ARQ block, when the ARQ block has no error, initializing and driving a timer used for determining whether to perform the ARQ feedback according to reception of a next ARQ block, when receiving the next ARQ block without error before the timer expires, initializing and driving the timer, and when the timer expires, performing the ARQ feedback in relation to at least one ARQ block received without error.
摘要:
An apparatus and method for communicating channel information in a relay wireless communication system are provided. A Base Station (BS) apparatus includes a message generator for generating a channel measurement request message to be transmitted to a Relay Station (RS) when the RS is connected; a Transmit (TX) modem for performing a physical layer processing on a message generated by the message generator and for transmitting the processed message; a message analyzer for analyzing a channel measurement response message received from the RS and for obtaining channel estimation information; and a scheduler for performing data scheduling by using the channel estimation information for a predetermined duration corresponding to a plurality of frames.