Abstract: A communication method using a relay station (RS) in a mobile communication system is disclosed. A base station transmits identification information, which designates a position of a relay station region during at least one next frame, to a mobile subscriber station through the relay station, and the mobile subscriber station identifies the position of the relay station region during the at least one next frame. Thus, the mobile subscriber station does not need to synchronize with a relay station preamble to retrieve the relay station region for every frame, and a start point of the relay station region can be retrieved quickly and exactly even in the case that the position of the relay station region is varied.

Abstract: The invention relates to a communication device and method that dynamically uses frequency resources, and more particularly, to a mobile terminal and a communication method that can dynamically allocate frequencies. The mobile terminal, which can dynamically allocate frequencies includes a communication module including a cognitive engine and a communication system block. The cognitive engine searches frequency bands based on both specific frequency policy and a service chosen by the user and selects a specific frequency band from the searched frequency bands. The communication system block includes a platform block for performing configuration for the selected frequency band and at least one component block for performing data processing based on a specific protocol according tox the configuration of the platform block.

Abstract: A method of performing ranging through a relay station (RS) and supporting thereof is disclosed. If ranging is performed in a system which performs communication between a mobile station and a base station through relay of a relay station, the ranging is performed under the leading of the relay station. In other words, if the relay station determines whether ranging between the mobile station and the relay station is required and also determines transmission parameter adjustment values and reports the determined result to the base station, the base station performs the ranging in such a manner that it prepares a message suitable for a specific format and forwards the message to the mobile station through the relay station.

Abstract: A communication method of a mobile station through a relay and a communication method of a relay system are disclosed. The communication method of a mobile station through a relay station comprises adding candidate relay information to channel status information periodically transmitted to a base station if a downlink signal quality value between the mobile station and the base station is less than a threshold value and a downlink signal quality value between at least one candidate relay station and the mobile station is higher than the downlink signal quality value between the mobile station and the base station; receiving information of a relay station selected among the at least one candidate relay station by the base station in accordance with the candidate relay information from the base station through a relay path indicator; and receiving data from the selected relay station at a time when the relay path indicator indicates.

Abstract: A method for reporting a channel status in a mobile communication system including a relay station (RS) is provided. When a mobile terminal in the coverage of a base station (BS) receives a service through an RS, the RS reports a channel status between the RS and the terminal to the BS to allow the BS to decide whether or not to communicate with the terminal through the RS. In the method, a first RS in communication with a BS and at least one terminal measures a channel quality with a first terminal and compares the measured channel quality with a threshold and transmits a report message to the BS according to the comparison. The report message is to request the BS to measure a channel quality of at least one of a second RS and the first terminal in communication with the BS.

Abstract: A method for scheduling broadcast messages to transmit system information is disclosed. This method for scheduling broadcast messages having system information classifies a plurality of system information into one or more groups. For example, the system information may be control information for a network entry and initialization of a mobile station, or a burst profile. Then, the scheduling method allocates different numbers of transmission times to the individual groups, and determines transmission start times of system information of the individual groups according to the allocated transmission times.

Abstract: A method of allocating a radio resource in a wireless access system is disclosed. The method includes receiving a control message associated with radio resource allocation for transmitting uplink data to the base station, wherein the control message comprises a first persistent uplink allocation information element comprising first resource allocation information associated with a first resource allocation region for transmitting the uplink data of a mobile station and transmitting an acknowledgment (ACK) message from the mobile station to the base station in response to successfully receiving the first persistent uplink allocation information element.