摘要:
A method and an apparatus handle an emergency in a wireless communication system. A method of a serving Base Station (BS) for detecting an emergency in a wireless communication system includes receiving an emergency call signal from Mobile Stations (MSs) in a cell; determining whether the number of the received emergency call signals exceeds a threshold number of times; when the number of the received emergency call signals exceeds the threshold number of times, detecting an emergency of a BS; and transmitting a message indicating the emergency to an MS in the cell.
摘要:
A method for allocating a band Adaptive Modulation and Coding (AMC) channel in a wireless communication system that divides a full frequency band into a plurality of subcarrier bands and includes subchannels, each of which is a set of a predetermined number of neighbor subcarrier bands. Upon recognizing a need for a band AMC channel, a subscriber station (SS) sends a request for allocation of the band AMC channel to a base station (BS). Upon receiving the band AMC channel allocation request, the BS determines if it can allocate the band AMC channel requested by the SS, considering a resource situation of the BS, and transmits information on the determination to the SS.
摘要:
A method and an apparatus handle an emergency in a wireless communication system. A method of a serving Base Station (BS) for detecting an emergency in a wireless communication system includes receiving an emergency call signal from Mobile Stations (MSs) in a cell; determining whether the number of the received emergency call signals exceeds a threshold number of times; when the number of the received emergency call signals exceeds the threshold number of times, detecting an emergency of a BS; and transmitting a message indicating the emergency to an MS in the cell.
摘要:
A method for allocating a band Adaptive Modulation and Coding (AMC) channel in a wireless communication system that divides a full frequency band into a plurality of subcarrier bands and includes subchannels, each of which is a set of a predetermined number of neighbor subcarrier bands. Upon recognizing a need for a band AMC channel, a subscriber station (SS) sends a request for allocation of the band AMC channel to a base station (BS). Upon receiving the band AMC channel allocation request, the BS determines if it can allocate the band AMC channel requested by the SS, considering a resource situation of the BS, and transmits information on the determination to the SS.
摘要:
A method and an apparatus for providing preamble information in a wireless communication system are provided. The method of a Base Station (BS) of a first system for providing neighbor BS information of a second system in a communication environment covering the first system and the second system together includes generating a message comprising information indicating a superframe boundary of a neighbor BS of the second system, and transmitting the message comprising the information indicating the superframe boundary to a Mobile Station (MS).
摘要:
An apparatus and method for retransmitting data in a wireless communication system are provided. The method includes transmitting data to at least one lower node, temporarily storing the data transmitted to the lower node, if ACKnowledgement (ACK) information of a relay link is not received for a predetermined time after data transmission or if the ACK information of the relay link is received from a lower Relay Station (RS), identifying if error occurrence information of an access link is received from the lower RS, and, if the ACK information of the access link is received from the lower RS, recognizing that data transmission to a Mobile Station (MS) succeeds.
摘要:
An apparatus and a method for supporting periodic multicast transmission in a machine type communication system are provided. A method for operating a Base Station (BS) in a communication system includes allocating persistent resources for data transmission of a service group, selecting at least one MS to feed back a success/failure in receiving a map including the persistent resource allocation information, among Mobile Stations (MSs) to receive the persistent resource allocation information, and transmitting the map including the persistent resource allocation information and information indicating the selected MS.
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 a method for supporting multicast communication in a broadband wireless access system are provided. A method of a Mobile Station (MS) for supporting multicast communication in a wireless access system includes acquiring decoding parameters by receiving an Advanced Air Interface Enhanced-Multicast and Broadcast Service configuration (AAI-E-MBS_CFG) message from a Base Station (BS), establishing an E-MBS service flow by sending and receiving AAI Dynamic Service Addition-request/response (AAI_DSA-REQ/RSP) messages to and from the BS, and decoding E-MBS MAP received from the BS through the established E-MBS service flow using the acquired decoding parameters. The E-MBS MAP includes information for decoding multicast bursts.
摘要:
An apparatus and method for transmitting an ACK/NACK message from an RS in a wireless communication system using relaying is disclosed, in which the RS checks scheduling information for data transmission from a lower node, receives data from the lower node according to the scheduling information, checks errors in the data, generates error report information indicating whether the data has errors, and transmits the error report information to an upper node.