Abstract: An apparatus and method for providing/receiving a voice service in a Wireless Local Access Network (WLAN) system. In the voice service provision method, an Access Point (AP) generates a multiplexing voice data packet by performing a multiplexing operation on at least two voice data packets among received voice data packets, and performs a multicast operation of multicasting the multiplexing voice data packet to Mobile Stations (MSs) which should receive the at least two voice data packets.

Abstract: The present invention relates to a method and device for distributing idle UE by a carrier in eNB of a multi-carrier based mobile communication system. The method of distributing idle UE in a multi-carrier based mobile communication system according to the present invention includes a process of determining a search rate by a carrier on the basis of information representing load on the carrier, a step of determining a cell reselection priority on the idle UE on the basis of the determined search rate, and a process of transmitting the determined cell reselection priority to the idle UE.

Abstract: An apparatus and method for dynamically allocating a multicast path in a broadband wireless access system are provided. A method for an operation of a server providing a multicast service through a wireless access network includes determining to establish multicast paths for a first Base Station (BS) and at least one neighboring BS of the first BS when a terminal receiving the multicast service enters a network through the first BS, and transmitting a control station a message of instructing to establish the multicast path for a BS not holding the multicast path among the first BS and the at least one neighboring BS of the first BS.

Abstract: A method and an apparatus for balancing a load by taking into consideration a load of each mobile communication network (Public Land Mobile Network (PLMNs)) of a network sharing architecture are provided. A base station apparatus of a communication system having a network sharing architecture capable of serving at least one mobile terminal via at least two PLMNs is provided. The apparatus includes a load calculator and a load balancing controller. The load calculator is configured to calculate respective loads of the PLMNs. When a first network of the PLMNs is overloaded, the load balancing controller is configured to balance an overload to the first network included in cells neighboring a serving cell.

Abstract: An apparatus and a method for optimizing a parameter of an antenna based on radio frequency (RF) environment information in a wireless communication system are provided. The electronic device includes a reception unit configured to receive first network information and second network information, and a transmission unit configured to transmit a first signal to adjust a parameter of an antenna when a difference between a first indicator value included in the first network information and a second indicator value included in the second network information is greater than or equal to a first threshold.

Abstract: The present invention relates to a method and device for distributing idle UE by a carrier in eNB of a multi-carrier based mobile communication system. The method of distributing idle UE in a multi-carrier based mobile communication system according to the present invention includes a process of determining a search rate by a carrier on the basis of information representing load on the carrier, a step of determining a cell reselection priority on the idle UE on the basis of the determined search rate, and a process of transmitting the determined cell reselection priority to the idle UE.

Abstract: Scanning cycle synchronization of a multicast service in a broadband wireless access system is provided. Multicast group information of a multicast group to which a Mobile Station (MS) belongs is received at the MS from an application server. A scanning cycle pattern and a scan offset of a multicast service corresponding to the multicast group are determined. A scanning cycle of the multicast is set according to the scanning cycle pattern and the scan offset. Scanning and reception of multicast data are performed according to the scanning cycle.

Abstract: An apparatus and a method of removing a high boiling point residue from a waste refrigerant are provided to improve a reuse rate of the waste refrigerant by improving an oil removal rate at which oil is separated from the waste refrigerant. The apparatus includes a vaporizer that is configured to vaporize a waste refrigerant collected from a vehicle and includes an oil outlet configured to exhaust oil separated from the waste refrigerant. In addition, an oil separator is configured to receive the vaporized waste refrigerant transferred from the vaporizer and separate oil mists remaining in the waste refrigerant from the waste refrigerant.

Abstract: A method and an apparatus for distributing a load of a base station in a wireless communication system supporting multi-carriers are provided. In the method, carriers are classified into a plurality of groups. A load of each of a plurality of cells corresponding to the plurality of groups, is determined. A cell load of each of the plurality of cells is compared with at least one threshold set in advance. When a cell load of a first cell has a value greater than the at least one threshold set in advance, a cell inside a group of the first cell or a cell inside a group different from the first cell is selected depending on the cell load of the first cell. A terminal of the first cell is allowed to perform a handover to the selected cell.

Abstract: Disclosed is a method for performing a network optimization process in a mobile communication system. The method includes receiving UpLink Radio Frequency (UL RF) information about a UL signal which a at least one eNB receives from a device in which a drive test is performed, receiving DownLink (DL) RF information about a DL signal which the device receives from the at least one eNB, predicting an RF environment and performance for the at least one eNB based on the received UL RF information and DL RF information, and determining at least one parameter for network optimization which is applied to the network optimization process based on the predicted RF environment and performance for the at least one eNB.

Abstract: An apparatus and method for processing accounting in a wireless communication system are provided. The method includes creating an accounting data base (DB) for a mobile station (MS), determining whether a state transition of the MS occurs, if the state transition of the MS occurs, updating state information in the accounting DB, and transmitting the accounting information including the state information to an accounting server.

Abstract: The present invention relates to a cation-exchanged zeolite catalyst for an transiodination and a process for producing mono-iodo benzene by using it. Particularly, the cation-exchanged zeolite catalyst has a molar ratio of Si/Al from 5 to 100 and is ion-exchanged with an alkali metal or an alkaline earth metal in range of 2% to 50% of ion exchange capacity. Further, the process for producing mono-iodo benzene of the present invention comprises the step of performing a transiodination by using the cation-exchanged zeolite catalyst to produce mono-iodo benzene from reactants including benzene and one or more multi-iodo benzenes selected from the group consisting of di-iodo benzene and tri-iodo benzene.

Abstract: The present invention relates to a smart phone having an emergency call button, including an emergency button (110) which is engraved on a rear surface of the smart phone so as not to protrude from the rear surface and has a touch detection unit (111) provided on the rear surface of the smart phone to detect a touch signal according to manipulation of a user, and a decompression detection unit (112) provided on a lower portion of the touch detection unit (111) to detect a decompression signal according to the manipulation of the user; and an emergency call transmission unit (120) which, when the touch signal and the decompression signal are received from the emergency button (110), transmits preset emergency rescue request information to a guardian terminal (10) and an agency server (20) and records a voice coming from the scene of an accident in real time and transmits the live recording information to a mobile communication company server (30).

Abstract: The present invention relates to a cation-exchanged zeolite catalyst for an transiodination and a process for producing mono-iodo benzene by using it. Particularly, the cation-exchanged zeolite catalyst has a molar ratio of Si/Al from 5 to 100 and is ion-exchanged with an alkali metal or an alkaline earth metal in range of 2% to 50% of ion exchange capacity. Further, the process for producing mono-iodo benzene of the present invention comprises the step of performing a transiodination by using the cation-exchanged zeolite catalyst to produce mono-iodo benzene from reactants including benzene and one or more multi-iodo benzenes selected from the group consisting of di-iodo benzene and tri-iodo benzene.

Abstract: An adaptable antenna apparatus for a base station is provided. The adaptable antenna apparatus includes a first antenna having a first antenna array, a second antenna rotatably coupled to the first antenna and having a second antenna array, and a main controller provided in one of the first antenna and the second antenna, wherein the main controller is configured to apply a control signal to the first antenna and the second antenna.

Abstract: The present invention relates to a fuel cell-engine hybrid system formed to effectively utilize an exhaust gas discharged from a process for generating electricity. A fuel cell-engine hybrid system according to the present invention includes: an electricity generating unit including a cathode and an anode interposing an electrolyte membrane therebetween; and an engine unit connected to a rear end of the electricity generating unit and generating power by receiving the exhaust gas discharged from the anode.

Abstract: An apparatus and a method for managing an access state of a terminal for a group communication service in a wireless communication system are provided. In a method for operating a terminal for a group communication service in a wireless communication system, a bandwidth ranging message is transmitted to a base station in an idle state. The terminal is allocated an uplink resource from the base station. A message for access state transfer including a multicast Connection IDentifier (CID) is generated. The message for access state transfer is transmitted to the base station via the allocated uplink resource.

Abstract: A structure is provided for protecting a Radio Frequency Remote Head (RRH). The structure includes a solar head and a solar body. An upper side of the solar head is sloped to prevent an inflow of rainwater and has at least one solar panel, and a lower side thereof has at least one round cable hole surrounded by a rubber material. The solar body is situated on a lower end of the solar head and includes a plurality of solar panels, a side of each of which is sloped to prevent an inflow of rainwater and is openable upward. An upper end of the solar body has an air outlet formed to exhaust air, and a lower end thereof has an air inlet formed to receive air. The air outlet and the air inlet each have a plurality of supports arranged at specific intervals and connected by a protection net.

Abstract: A method for a load balancing using statistical information in a base station of a wireless communication system is provided. The method includes measuring a load of at least one cell managed by the base station; exchanging load information of the measured cell with at least one neighboring base station; determining at least one Mobility Load Balancing (MLB) application candidate cell in which a Cell Individual Offset (CIO) change is necessary using the load information; determining at least one MLB application target cell in the at least one MLB application candidate cell; performing a CIO change procedure with the at least one MLB application target cell; selecting at least one User Equipment (UE) to notify a CIO change; and notifying the selected at least one UE of the CIO change.

Abstract: The present invention relates to a method and device for distributing idle UE by a carrier in eNB of a multi-carrier based mobile communication system. The method of distributing idle UE in a multi-carrier based mobile communication system according to the present invention includes a process of determining a search rate by a carrier on the basis of information representing load on the carrier, a step of determining a cell reselection priority on the idle UE on the basis of the determined search rate, and a process of transmitting the determined cell reselection priority to the idle UE.