Abstract:
Disclosed are a BBU power configuring method and a BBU which determine required power which is requested by a BBU to an RRH to transmit a downlink signal to a terminal based on RRH power headroom information in a cloud LAN environment in which the RRH and the BBU are separated and transmit a power allocation change request message for making a request for changing transmission power of other BBUs connected to the RRH to the other BBUs.
Abstract:
A method and apparatus for acquiring information on an access point (AP) in a wireless communication system is provided. An AP information management entity of a cellular system transmits a request for information on an AP to an AP server, and receives a response, which includes a result code of the request, from the AP server. The AP information management entity of the cellular system may be one of an eNodeB (eNB), mobility management entity (MME), or a new entity of the cellular system.
Abstract:
The present invention relates to a method for managing information of on/off small cells in a small cell-based network system and apparatuses for supporting the same. As an embodiment of the present invention, a method for managing information on on/off small cells in a radio access system supporting small cells comprises the steps of: receiving a first message including cell state change information of a first cell corresponding to a small cell, which is changed to an on state or an off state, by a second cell; and transmitting a second message including the cell state change information to a UE by the second cell. At this time, the cell state change information may contain identification information of the first cell, on/off time information indicating a time when change to an on state or an off state is made, and on/off timer information indicating a time interval in which the change to the on state or the off state is made.
Abstract:
A method and apparatus for obtaining information related to beacon transmission in a wireless communication system is provided. A node of a primary radio access technology (RAT) system obtains first information related to beacon transmission including information on a start point of a beacon interval of each entity of a secondary RAT system, and transmits second information related to the beacon transmission based on the obtained first information related to the beacon transmission to a general device through the primary RAT system.
Abstract:
A method and apparatus of registering an entity of a secondary radio access technology (RAT) system in a management device of a primary RAT system in a wireless communication system is provided. The primary RAT system may be a cellular system, and the management device of the primary RAT system may be one of eNodeB (eNB), mobility management entity (MME), or a new entity. The second RAT system may be a wireless local area network (WLAN) system, and the entity of the secondary RAT system may be an access point (AP). The AP registration method may be initiated by the AP, or a general device, e.g., a multi radio access technology (RAT) device supporting a plurality of RATs.
Abstract:
A method and a user equipment (UE) for network attachment are disclosed. The method includes receiving first status information associated with one or more remote radio units (RRUs) for supporting the small cell from the one or more RRUs, receiving second status information associated with one or more macro cells from one or more macro eNBs for supporting the macro cell, selecting an RRU and macro eNB, which the UE wants to attach, among the one or RRUs based on the first status information and the second status information, and simultaneously transmitting an attach request message for requesting network attachment from the selected RRU and macro eNB to the selected RRU and macro eNB.
Abstract:
The present invention relates to methods and apparatuses for supporting or controlling a small cell on or off procedure. The method may comprise steps of receiving, by the MSC from a Source Small Cell (SSC), a Cell Off Indication message including a Cell State Change Indication parameter indicating a cell status of the SSC; transmitting, by the MSC to the SSC, an Expand Indication message indicating an expanding of the MSC when the Cell State Change Indication parameter indicates a cell off status, the Expanding Indication message including a Time to Start Expand parameter indicating when the MSC starts an expanding of its coverage and an Expand Timer parameter indicating a time period during which the expanding is performed; and starting the expanding of its coverage at a time indicated by the Time to Start Expand parameter during the time period indicated by the Expand Timer.
Abstract:
The present invention relates to a wireless access system and provides methods and apparatuses for controlling and supporting dynamic cell on or off. In an embodiment of the present invention, a method for supporting on or off of a second cell at a first cell in a wireless access system includes receiving a cell on/off state indicator message indicating on or off of the second cell from the second cell, adjusting a handover offset of the second cell, taking into account interference caused by the on or off of the second cell, and transmitting handover offset information about the adjusted handover offset to at least one of the second cell and a first User Equipment (UE).
Abstract:
A method for receiving downlink data by the terminal in a wireless communication system, includes receiving, from a base station, downlink control information for scheduling a short physical downlink shared channel (sPDSCH) on a short physical downlink control channel (sPDCCH), and receiving, from the base station, downlink data on the sPDSCH based on the downlink control information. Here, the sPDCCH and the sPDSCH are based on a first transmission time interval (TTI)-based radio frame structure, wherein the first TTI-based radio frame structure is shorter in time than a second TTI-based radio frame structure related to (i) a physical downlink shared channel (PDSCH) and (ii) a physical downlink control channel (PDCCH). Further, a number of resource element groups (REGs) consisting of a control channel element (CCE) related to the sPDCCH is smaller than a number of resource element groups (REGs) composed of a CCE related to the PDCCH.
Abstract:
The present invention relates to a method and a device for a terminal transmitting/receiving data in a wireless communication system. According to the present invention, a method and a device may be provided by which a first message comprising first control information is received from a base station, wherein the first control information comprises a logical path identifier (ID) indicating a logical path for transmitting/receiving first data and second data, which is the same as the first data; as a response to the first message, a reply message is transmitted to the base station; and the first data and the second data are transmitted, to the base station, on multiple component carriers (CC) associated with the logical path corresponding to the logical path ID.