Samsung Electronics Co., Ltd.

Hwa-Jin Cha

Han-Seok Kim

Jung-Min Choi

Jeong-Jae Won

Dae-Joong Kim

Kyeong-In Jeong

Jong-Hyung Kwun

Ok-Seon Lee

Sung-Oh Kwon

Neung-Hyung Lee

Abhishek Roy

Hye-Jeong Kim

Jong-In Kim

Sang-Soo Jeong

Ho-Sun Youm

Hee-Jeong Lee

Sung-Hwan Won

Jung-Hee Han

Mi-Sun Do

Seong-Hun Kim

Jung-Hoon Cheon

Seong-Ryong Kang

Roy Abhishek

Yong-Shin Cho

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.

Method and device for distributing idle user equipment in multi-carrier based mobile communication system

The present disclosure relates to a method and apparatus for optimizing mobility robustness by controlling an inter-Radio Access Technology (inter-RAT) factor. A method for supporting inter-Radio Access Network (RAN) mobility by a source Base Station (BS) in a wireless communication system includes transmitting a handover request message to a target BS, receiving a RAN information request message including a measurement report from the target BS in response to the handover request message, and determining to amend a mobility setting, if it is determined that an unnecessary handover has occurred based on the RAN information request message. The handover request message includes at least one of a Tracking Area Identifier (TAI) of a tracking area to which the source BS belongs, a global BS Identifier (ID), and an E-UTRAN (Evolved-UMTS (Universal Mobile Telecommunication System) Terrestrial Radio Access Network) Cell Global ID (ECGI).

Method and apparatus for inter-radio access network mobility

A method and an apparatus for controlling a handover in a wireless communication system are provided. The method of operating an eNodeB (eNB) for controlling the handover of terminal in the wireless communication system includes receiving, by the eNB, a message indicating a link connection failure between a neighboring eNB and a Mobile Management Entity (MME), and restricting an execution of a handover based on a link connection between the neighboring eNB and the MME.

Apparatus and method for controlling handover in wireless communication system

Managing a tracking area list in a wireless communication system is provided. An operation of a Mobile Station (MS) includes transmitting a request for tracking area update for a 1st tracking area, receiving a tracking area list to which the 1st tracking area and a 2nd tracking area are added, and updating a stored tracking area list by the tracking area list to which the 1st tracking area and the 2nd tracking area are added.

Apparatus and method for managing tracking area list in wireless communication system

The time required to set up a voice call in an exemplary embodiment, in which Circuit Switched Fallback (CSFB) is used, is reduced to provide a voice call service to a User Equipment (UE) in a Long Term Evolution (LTE) system. If a voice call occurs in a UE while the UE accesses the LTE system, the UE using CSFB switches to a 2G/3G legacy system, recycles system information for a 2G/3G cell that the UE has accessed before, and immediately proceeds with voice call setup without receiving system information unnecessary for a CSFB process.

Method and apparatus for setting up call in mobile communication system

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.

Method and apparatus for balancing cell load in wireless communication system

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.

Method and apparatus for distributing load in wireless communication system

An apparatus and method for automatically searching for a low-power Base Station (BS) supporting access of a registered user in a mobile communication system includes a method of performing automatic search on a Closed Subscriber Group (CSG) cell by a User Equipment (UE). The method includes determining by the UE whether automatic search needs to be performed on the CSG cell. The method also includes, if it is determined that automatic search does not need to be performed on the CSG cell, turning off by the UE a CSG cell automatic search function of the UE by emptying a first white list including CSG Identifiers of accessible CSG cells.

Apparatus and method for automatically searching for low-power base station supporting access of registered user in mobile communication system

Provided are a paging method and an apparatus thereof for User Equipment (UE) in a broadband wireless communication system. In the method, a paging message is received from a macro base station. Whether there exists an accessible femto base station inside a service area of the macro base station is determined. When there does not exist the accessible femto base station inside the service area of the macro base station, the UE responds to the paging message of the macro base station. When there exists the accessible femto base station inside the service area of the macro base station, the UE waits for a paging message to be received from the femto base station.

Paging method and apparatus thereof in broadband wireless communication system

A method and system for improving a call drop caused by a Radio Link Failure (RLF) before handover triggering in a mobile communication system are provided. The method of improving the call drop caused by the RLF in the mobile communication system includes detecting an RLF occurring before handover triggering (RLF_before_HO), generating one of an RLF_before_HO-dependent statistics and an RLF_before_HO-dependent log file, transmitting the one of the RLF_before_HO-dependent statistics and the RLF_before_HO-dependent log file to a serving Base Station (BS), and updating a Neighbor Relation Table (NRT) and optimizing a handover parameter using the one of the RLF_before_HO-dependent statistics and the RLF_before_HO-dependent log file.

Method and system for improving call drop caused by radio link failure in mobile communication system

An apparatus and method for handover in a mobile communication system enables a Mobile Station (MS) to perform a normal handover without performing an unnecessary handover. A Base Station (BS) apparatus capable of preventing an unnecessary handover includes a handover manager. The handover manager receives handover information, including information about at least one cell through which an MS has passed, from a neighbor cell to determine whether the MS has performed an unnecessary handover. If it is determined that the MS has performed an unnecessary handover, the handover manager notifies the occurrence of the unnecessary handover by the MS to the neighbor cell.

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Seongnam-si, South Korea

Hwa-Jin Cha