Abstract:
A method and apparatus for performing access control and/or membership verification for dual connectivity in a wireless communication system is provided. A first evolved NodeB (eNB) transmits a closed subscriber group (CSG) membership status of a user equipment (UE) to a second eNB, which is a home eNB (HeNB), and receives at least one of a CSG identifier (ID) or a cell access mode of the second eNB from the second eNB. A mobility management entity (MME) may verify the CSG membership status of the UE and transmit the verified CSG membership status of the UE to the first eNB. And then, the first eNB transmits the verified CSG membership status of the UE to the second eNB.
Abstract:
The present invention relates to a method and a device for performing cell shaping. A base station can establish a cell shaping plan on the basis of current states. The current states may be the load of the base station and the traffic space distribution of the base station. The base station transmits a first message to a neighboring base station and receives a second message from the neighboring base station in response to the first message. The first message may include the cell shaping plan, and the second message may include whether or not the neighboring base station can perform cell shaping. The base station can determine whether or not to perform cell shaping on the basis of the second message.
Abstract:
A method and apparatus for handling duplicated evolved universal terrestrial radio access network (E-UTRAN) radio access bearers (E-RABs) for dual connectivity in a wireless communication system is provided. A mobility management entity (MME) receives an E-RAB modification indication message including several E-RAB identifiers (IDs) set to the same value, and triggers a user equipment (UE) context release procedure with a cause value.
Abstract:
A method for determining a radio resource control (RRC) configuration in a wireless communication system supporting dual connectivity, and an apparatus supporting the same is disclosed. The method for determining, by a base station (BS), a radio resource control (RRC) configuration in a wireless communication system supporting dual connectivity, includes transmitting, by a first BS, a first RRC configuration of a serving cell of the first BS or remained user equipment (UE) capability to a second BS configured in a UE, and receiving, by the first BS, a second RRC configuration of a serving cell of the second BS configured in the UE from the second BS. The first BS and the second BS are involved in dual connectivity for the UE, and the second RRC configuration is determined by the second BS based on the first RRC configuration or the remained UE capability.
Abstract:
A method and apparatus for transmitting user equipment (UE) group information in a wireless communication system is provided. A source eNodeB (eNB) of a handover procedure transmits a handover request message including UE group information to a target eNB of the handover procedure when the source eNB hands over a UE to the target eNB. The UE group information is included in a UE history information IE (information element) of the handover request message.
Abstract:
A method and apparatus for allocating physical cell identities (PCIs) in a wireless communication system is provided. An eNodeB (eNB) allocates PCIs for split cells of an active antenna system (AAS), and transmits information on range of the allocated PCIs for split cells of the AAS to user equipments (UEs) or neighbor eNBs.
Abstract:
Provided are a method and an apparatus for transmitting a maximum stratum level in a wireless communication system. An evolved NodeB (eNB) or a home eNB (HeNB) having a global positioning system (GPS) constitutes a maximum stratum level indicating a maximum value of a hop capable of supporting radio interface based synchronization (RIBS) and transmits the constituted maximum stratum level to a small cell. Meanwhile, the small cell determines whether a stratum level is greater than the maximum stratum level, and transmits the maximum stratum level to the eNB or the HeNB having the GPS when the stratum level is greater than the maximum stratum level.
Abstract:
The present invention relates to a method and apparatus for indicating a cell splitting pattern to a neighboring base station. A base station may perform cell splitting, and transmit, to the neighboring base station, coverage information representing the current shape of the split cells of the base station, determined by the cell splitting. In addition, the base station may further transmit, to the neighboring base station, index information indicating the current cell splitting pattern preconfigured between the base station and the neighboring base station. The neighboring base station may apply a set of mobility robustness optimization (MRO) parameters on the basis of the received coverage information.
Abstract:
A method and apparatus for transmitting an indicator in a wireless communication system is provided. According to an embodiment of the present invention, when a source eNodeB (eNB) initiates handover for a user equipment (UE), it informs a target eNB about whether the handover is to avoid in-device coexistence (IDC) interference problems or not. Alternatively, according to another embodiment of the present invention, an eNB, which the UE reestablished, informs an eNB, which radio link failure (RLF) of the UE occurred, about that the cause of UE's RLF was IDC interference.
Abstract:
A method and apparatus for determining handover of user equipments (UEs) attached to a mobile relay node (RN), which is moving from a source DeNB to the target DeNB, in a wireless communication system is provided. A target donor eNodeB (DeNB) receives a handover request message, and receives an indication including UE context of the UEs attach to the mobile relay node. The target DeNB determines whether to accept or reject the handover of each UE.