Abstract:
A method for providing scalable service in a wireless communication system is disclosed. In this method, the transmitting side device performs initial transmission of base layer signals to a user equipment (UE) based on a HARQ (Hybrid Automatic Repeat Request) scheme, and performs transmission of enhancement layer signals to the UE after finishing the initial transmission of the base layer signals. The base layer signals and the enhancement layer signals are for one scalable service. The base layer signals can be independently used at the UE without the enhancement layer signals, while the enhancement layer signals cannot be used at the UE without the base layer signals. The transmitting side device further performs retransmission of the base layer signals determined to be retransmitted based on the HARQ scheme while performing the initial transmission of the enhancement layer signals.
Abstract:
Disclosed are a communication performing method and terminal, and the method is a method by which a terminal with dual connectivity performs communication in a heterogeneous cell environment, in which: a first reporting message reporting that a downlink signal is received from a small cell in an intensity greater than a threshold value is transmitted to a macro cell; an RRC establishment message indicating a connection to a small cell cluster is received from the macro cell; connections are added to a plurality of small cells included in the small cell cluster according to additional time information included in the RRC establishment message; and the connections to the plurality of added small cells are respectively activated according to activation connection time information included in the RRC establishment message, and the small cell cluster is determined on the basis of information on a location relationship among the plurality of small cells.
Abstract:
A method for receiving a signal at a User Equipment (UE) in a multi-tier wireless communication system is disclosed. The method includes receiving antenna turn-on/turn-off interval information about a transmission point. The antenna turn-on/turn-off interval information is used for connection transition of a UE related to the transmission point.
Abstract:
A method and a macro cell eNB are disclosed. The method includes receiving a measurement report message of the small cell from the UE connected to the macro cell, determining to configure dual connectivity with the macro cell and the small cell to the UE based on a measured value contained in the measurement report message, transmitting a dual connectivity request message for requesting connection with the UE to the small cell, receiving a dual connectivity response message indicating that the small cell is connected to the UE to determine to allocate a resource to the UE, from the small cell, and transmitting an RRC configuration message for requesting addition of connection with the small cell, to the UE.
Abstract:
Disclosed are a terminal, which receives a downlink signal from a plurality of RRHs, transmits a random access preamble to any one target RRH in which the intensity of the received downlink signal among the plurality of RRHs is greater than or equal to a threshold value, receives a random access response message indicating that an uplink connection to a selected RRH will be configured on the basis of difference of a reception power of a random access preamble received by the target RRH and a reception power of a random access preamble which is overheard by a neighborhood RRH adjacent to the target RRH, and configures an uplink connection to the selected RRH, and an uplink connection configuration method thereof.
Abstract:
The present application provides methods for controlling a small cell on or off procedure in a Small cell specific Gate Way (S-GW). One of the methods comprises steps of receiving a cell indication message from a Source Small Cell (SSC), the cell indication message includes a cell state change indication parameter indicating whether the SSC is to be on or off and a cell on/off timer parameter indicating a time duration for a cell on process or a cell off process; transmitting request message requesting to expand or shrink a cell coverage of a Target Small Cell (TSC) according to the cell state change indication parameter; and receiving a complete indication message indicating the cell on process or the cell off process is complete after the time duration indicated by the cell on/off timer parameter from the SSC.
Abstract:
A method and apparatus for establishing a device-to-device (D2D) connection in a wireless communication system is provided. A first device selects at least one connection identifier (CID) among unused CIDs by the first device and other devices, and transmits a connection establishment request message to a second device. The first device receives a connection establishment response message from the second device. The connection establishment response message includes the D2D peer ID of the first device, the D2D peer ID of the second device, a CID list unused by the second device and a first CID determined by the second device. The first device transmits a connection establishment confirm message including a second CID confirmed by the first device to the second device.
Abstract:
The present invention relates to a method for updating a TAC in a multi-RAT environment and a method for transmitting/receiving paging information. A terminal, which is capable of establishing a radio connection through a first radio interface by a first radio protocol and a radio connection through a second radio interface by a second radio protocol, may determine the best radio interface on the basis of predetermined conditions, perform a TA update through the best radio connection interface, and transmit/receive paging information through the best radio connection interface.
Abstract:
A method and apparatus for performing a plurality of network attachment procedures to support a plurality of cells for a small cell-based User Equipment (UE) service are disclosed.
Abstract:
A method and apparatus of acquiring information on a primary radio access technology (RAT) system in a wireless communication system is provided. An entity of a secondary RAT system transmits a request for information on the primary RAT system to a multi-RAT device, and upon transmitting the request, starting a waiting timer which has a default value. If it is determined that the information on the primary RAT system cannot be acquired, by the multi-RAT device, until the waiting timer expires, the entity of the secondary RAT system reconfigures the waiting timer by a fixed value or a dynamic value.