Lg Electronics Inc.

The Asan Foundation

Jin Sook Ryu

Jian Xu

Kyung Min Park

Sung Hoon Jung

Young Dae Lee

Hyun Sook Kim

Gene Beck Hahn

Jae Hyun Kim

Dae Wook Byun

Dong Keun Lee

Yung Mi Kim

Jong Jin Lee

Tae Hyeon Kim

Jae Seung Kim

Lae Young Kim

Hyounhee Koo

Ji Woong Lee

Chul Hoi Koo

Seung Jun Oh

Sang Ju Lee

Yung-Mi Kim

Dae Hyuk Moon

Cheol Gwak

The present invention relates to a method for labelling fluorine-18, which is a radioisotope, and more specifically, to a method for labelling a [F]fluoride in a method for preparing an organic [F]fluoro compound by reacting an alkyl halide or an alkyl sulfonate with a [F]fluoride, wherein a [F]fluoride supported on a quaternary alkyl ammonium polymer support is eluted using a solution containing a metal salt or a quaternary ammonium salt with an adjusted pH, and a base is not additionally used. The present invention enables a labeling reaction without an additional base after precisely reflecting the concentration of a base absolutely necessary for the nucleophilic substitution of a [F]fluoride or eluting a [F]fluoride using a [F]fluoride eluent with an adjusted pH, thereby stably obtaining a [F]fluoride-labelled compound in a high yield, and is thus useful for production of fluorine-18-labelled radioactive medical supplies.

Method for preparing fluorine-18 eluent with adjusted PH, and method for labelling fluorine-18 using same

A method and apparatus for performing a membership verification or an access control in a wireless communication system is provided. A mobility management entity (MME) performs the membership verification or the access control of a user equipment (UE), and transmits verified UE membership information to a target HeNB.

Method and apparatus for performing membership verification or access control in wireless communication system

A method and apparatus for transmitting a handover report message in a wireless communication system is provided. In a heterogeneous network (HetNet) intra long term evolution (LTE) failure case, an eNodeB (eNB) performs a handover procedure for a user equipment (UE) with a source eNB, and receives a radio link failure (RLF) indication message. The eNB transmits a handover report message to the source eNB, the handover report message including UE history information element (IE) of the UE.

Method and apparatus for transmitting handover report message in wireless communication system

A method and apparatus for releasing delay tolerant access user equipments (UEs) in a wireless communication system is provided. An eNodeB (eNB) receives an overload message or a user equipment (UE) context release command message including a request for releasing the delay tolerant access UEs from a mobility management entity (MME), releases the delay tolerant access UEs based on the overload message or the UE context release command message.

Method and apparatus for releasing delay tolerant access user equipment in wireless communication system

A method and apparatus of performing a handover procedure in a wireless communication system is provided. The target eNodeB (eNB) receives a specific establishment cause of a user equipment (UE). The specific establishment cause among a plurality of establishment causes comprises emergency, high priority access, mobile terminated access, mobile oriented signaling, mobile oriented data, and delay tolerant access. The target eNB transmits a handover command message to the UE after receiving the specific establishment cause.

Method and apparatus for transmitting establishment cause value in wireless communication system

A method and apparatus for grouping home eNodeBs (HeNBs) in a wireless communication system is provided. The method includes grouping a plurality of HeNBs into at least one closed subscriber group (CSG) group, and transmitting an identifier (ID) of a specific CSG group to HeNBs included in the specific CSG group.

Method and apparatus for performing closed subscriber group grouping in wireless communication system

A method and apparatus for indicating a handover in a wireless communication system is provided. A mobile relay node (RN) receives an indication which indicates that there is no eNB supporting relay within neighbor cells from a donor eNodeB (eNB) serving the mobile relay node, and transmits a handover command message to user equipments (UEs).

Method and apparatus for indicating handover in wireless communication system including mobile relay node

A method and apparatus for transmitting a handover report message in a wireless communication system is provided. A first eNodeB (eNB) serves a first cell which is a coverage hole compensating cell between a source cell and a second cell, and a user equipment (UE) is moving from the source cell to the second cell through the first cell. The first eNB performs a handover procedure for a user equipment (UE) with a source eNB serving the source cell, receives a radio link failure (RLF) indication message from a second eNB serving the second cell, and transmits a handover report message to the source eNB, the handover report message including an indicator which informs the radio link failure.

A method and apparatus of transmitting a measurement report message in a wireless communication system is provided. A mobile station searches for at least one closed subcarrier group (CSG) cell included in a whitelist of the mobile station, and transmits to a GSM/EDGE radio access network (GERAN) cell the measurement report message including a toggling discriminator, which indicates an optimal CSG cell that satisfies a reporting criterion among the at least one found CSG cell, and a physical cell identify (PCI) and frequency of the optimal CSG cell.

Method and apparatus for transmitting measurement report message in wireless communication system

A method and apparatus for selecting a cell in a wireless communication system is provided. A pico eNodeB (eNB) or a home eNB (HeNB) receives served cell information for a primary cell (PCell) or a secondary cell (SCell) from an interfering neighbor eNB. The served cell information includes information on the number or portion of user equipments (UEs) served by a corresponding cell and information on a resource usage status of the corresponding cell by the UEs. The pico eNB or the HeNB selects a PCell or a SCell based on the received served cell information.

Method and apparatus for selecting cell in wireless communication system

A method and apparatus of detecting a radio link failure in a wireless communication system is provided. A mobile station initializes a radio link failure (RLF) counter for detecting the radio link failure and determines whether decoding of a message on a downlink channel is successful. The mobile station decrements a value of the RLF counter if the decoding fails, and increments the value of the RLF counter if the decoding is successful, and declaring the radio link failure if the value of the RLF counter is less than or equal to a specific value. A decrement size of the value of the RLF counter varies according to a received signal strength of the downlink channel.

Method and apparatus for detecting radio link failure in wireless communication system

A method and apparatus for releasing a user equipment (DUE) context in a wireless communication system is provided. A home evolved NodeB (HeNB) gateway (GW)/X2-proxy receives a UE context release message, forwards the UE context release message to a source eNB; and releasing the UE context of the corresponding UE. The source eNB and the target eNB may be connected through an indirect X2 interface. Or, a home evolved NodeB (HeNB) gateway (GW)/X2-proxy receives a UE context release request message from a source eNB, and releases the UE context of the corresponding UE based on the UE context release request message. The source eNB and the target eNB may be connected through a direct X2 interface.

Growing community of inventors

Anyang-si, South Korea

Jin Sook Ryu