Patent application number | Description | Published |
20090268688 | ACTIVE SET THRESHOLD ADJUSTMENT METHOD FOR USE IN WIRELESS INTERNET SYSTEM - Provided is an active set threshold adjustment method for use in a wireless Internet system. The method includes: calculating a resource utilization RU of a base station; calculating an average resource utilization RU | 10-29-2009 |
20090316651 | METHOD OF MULTI-PHASE CALL ADMISSION CONTROL ON WIRELESS INTERNET SYSTEM USING ACTIVE SET - Provided is a method of multi-phase call admission control on a wireless Internet system using an active set. The method includes the steps of: a) periodically checking, at one base station, active user sets of the base station and neighboring base stations to extract at least one terminal existing simultaneously in the respective active user sets of the predetermined base stations among the checked base stations for a predetermined period of time, and managing the extracted terminal as a stationary active user set; b) checking whether resources for the stationary active user set are available upon exhaustion of resources reserved for new and handover calls; and c) accepting a corresponding call when the resources are available, and rejecting the corresponding call when the resources are not available. | 12-24-2009 |
20100227619 | SYSTEM AND METHOD FOR DETECTING STATIONARY USERS AND CALL ADMISSION CONTROL METHOD THEREOF IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a stationary user detecting system and method and a call admission control method using the same in a wireless communication system. A plurality of base stations located in the wireless Internet system detect a stationary user at regular time intervals and maintain it by a predetermined number of cases for each terminal. Information on the maintained stationary user is recalculated with a stationary probability for each base station so as to be used for call admission control. Therefore, the terminal of the stationary user detected in the wireless Internet system is calculated with the stationary probability value, which is applied to the call admission control, thereby minimizing reservation of undesired resources. | 09-09-2010 |
20110141972 | TNL CONNECTION SETUP METHOD AND APPARATUS FOR BASE STATION USING DOWNLINK RECEIVER - A Transport Network Layer (TNL) connection setup method for a base station includes monitoring Physical Cell Identity (PCI) values of neighboring cells. When it is monitored that the PCI values are changed, IP addresses of neighboring base stations corresponding to the changed PCI values are acquired. Thereafter, it is determined whether it is necessary to perform a new TNL connection setup with respect to other neighboring base stations, based on the changed PCI values and the acquired IP addresses. When it is determined that it is necessary to perform the new TNL connection setup, the TNL connection setup is performed with the acquired IP addresses. | 06-16-2011 |
20110142004 | SMALL BASE STATION APPARATUS AND CELL SEARCH METHOD - A small base station apparatus includes: a communication unit for collecting system information of a neighboring cell through mobile communication terminals being connected to a cell of the small base station apparatus; a memory unit for storing the system information of the neighboring cell; and a controller for checking whether or not a mobile communication terminal is allowed a handover connection to the neighboring cell based on the system information of the neighboring cell, registering the neighboring cell in a handover candidate list of the mobile communication terminal if the mobile communication terminal is allowed the handover connection, selecting one of neighboring cells registered in the handover candidate list, and performing handover of the mobile communication terminal to the selected neighboring cell. | 06-16-2011 |
20110143737 | METHOD FOR ESTABLISHING BASE STATION INFORMATION OF FEMTOCELL BASE STATION, AND FEMTOCELL BASE STATION APPLIED THEREWITH - A method for setting base station information of a femtocell base station includes: upon a power application to the femtocell base station, setting all or some of terminals accessing the femtocell base station as console terminals; and receiving a radio environment parameter related to radio environment around each console terminal from the console terminals through a communication interface unit. The method further includes setting the base station information including an operation mode of the femtocell base station and a cell identifier of a femtocell covered by the femtocell base station based on the first radio environment parameter. | 06-16-2011 |
20110143783 | METHOD AND APPARATUS FOR PAGING OPTIMIZATION OF BASE STATION SUPPORTING HYBRID CELL - A method for paging optimization in a communication system having one or more base stations and one or more mobile stations within a paging target cell, includes detecting a hybrid base station supporting a hybrid cell from the one or more base stations; and determining whether or not one or more mobile stations registered in the hybrid cell include only closed subscriber group (CSG) members, and defining an operating state of the hybrid base station based on the determination result. The method further includes determining whether or not each of the one or more base stations is included in paging targets based on the operating state of the hybrid base station. | 06-16-2011 |
20110151907 | METHOD AND APPARATUS FOR CONTROLLING INTERFERENCE BETWEEN BASE STATIONS - A method for controlling interference between base stations in a radio communication system in which an indirect interface for indirectly connecting the base stations exists and an direct interface for directly connecting the base stations does not exist, the method includes: converting a first interference control message used in the direct interface into a format of a protocol of the indirect interface to thereby generate a second interference control message; and transmitting the second interference control message through the indirect interface. | 06-23-2011 |
20110151920 | HANDOVER CONTROLLING METHOD AND APPARATUS - A method for controlling a handover from a source base station to a target base station determines whether a direct interface connecting the source base station and the target base station exists, compares a link latency of the direct interface with a link latency of an indirect interface connecting the source base station and the target base station when it is determined that the direct interface exists, and selects a handover execution interface, between the direct interface and the indirect interface, based on the comparison result. | 06-23-2011 |
20120064906 | METHOD OF ADMISSION CONTROL FOR HYBRID FEMTOCELL - Provided is a method of admission control for a hybrid femtocell in a wireless communication system, in which the method is applied to a wireless communication system including a hybrid femto base station and a core network performing admission control of a mobile station terminal in a femtocell of the hybrid femto base station. The method of admission control for a hybrid femtocell performed by a core network according to an exemplary embodiment of the present invention includes determining whether a mobile station terminal has membership; determining whether speed information of the mobile station terminal exists; and assigning a probability value to the mobile station terminal depending on the membership and the speed information of the mobile station terminal | 03-15-2012 |
20120165027 | COMMUNICATION SYSTEM INCLUDING FEMTO BASE STATION - Provided is a terminal to transmit wireless environment measurement information to a femto base station, and the femto base station to receive the wireless environment measurement information from the terminal. The femto base station may perform initialization based on the wireless environment measurement information, or may transmit the wireless environment measurement information to a base station control unit. The base station control unit may determine whether to additionally install a second femto base station based on the wireless environment measurement information. | 06-28-2012 |
20130150042 | OPERATING METHOD OF CSG FEMTO BASE STATION, HANDOVER METHOD OF HANDOVER TO CSG FEMTO BASE STATION AND MANAGING METHOD OF MANAGING INFORMATION OF NEIGHBORING CSG FEMTO CELL - Disclosed is an operating method of a femto base station which includes broadcasting a plurality of public land mobile network (PLMN) identities; broadcasting a plurality of closed subscriber group (CSG) identities correlated with the plurality of PLMN identities; and establishing wireless communication with user equipment based on the broadcasted PLMN and CSG identities. | 06-13-2013 |
20130210439 | SYSTEM FOR TRANSMITTING SYSTEM INFORMATION OF LTE-BASED FEMTOCELL - Provided are a mobile communication system comprising a femto base station for transmitting system information, and a terminal for receiving the system information from the femto base station. The terminal receives the system information from the femto base station, and during other times, receives data from a serving macro base station. | 08-15-2013 |
20140162653 | INTER-CELL INTERFERENCE CONTROL METHOD AND APPARATUS - Disclosed is an inter-cell interference control method and apparatus. The inter-cell interference control method includes providing handover request information including interference information to a source base station, receiving handover completion information in accordance with the handover request information from at least one of the source base station and a target base station, and receiving interference control information in accordance with the interference information from the target base station. According to the present invention, inter-cell interference may be efficiently controlled, and overall performance of a network may be improved. | 06-12-2014 |
Patent application number | Description | Published |
20100136973 | METHOD AND APPARATUS FOR PERFORMING VERTICAL HANDOVER IN SDR TERMINAL - Disclosed are a method and apparatus for allowing a Software Defined Radio (SDR) terminal to perform a vertical handover between different services. The vertical handover method includes: receiving a handover request from an application service which is currently being executed; selecting a new application service which is a handover target from among a plurality of application services, in response to the handover request; installing the new application service in the SDR terminal so that the new application service is executable by the SDR terminal; and performing a handover to the new application service. Accordingly, since handover is performed seamlessly between different services, continuity of service may be ensured. | 06-03-2010 |
20120157077 | METHOD FOR DYNAMIC CHANGE OF OPERATION MODE IN WIRELESS COMMUNICATION SYSTEM - Disclosed is a method of operating a femto base station (BS) in a wireless communication system, the method comprising: receiving an access request comprising a closed subscriber group (CSG) identifier (ID) from user equipment (UE); determining a number N of UE accessing the femto BS; ascertaining an access type to determine whether the UE is a CSG UE or a non-CSG UE of the femto BS on the basis of the CSG ID of the UE; and determining whether to admit access of the UE on the basis of the access type, the N and access admittable information, the access admittable information comprising U | 06-21-2012 |
20120157154 | METHOD FOR CONTROLLING TRANSMISSION POWER IN FEMTO BASE STATION AND APPARATUS THEREOF - A method and an apparatus for controlling transmission power in a femto base station is provided. The method includes: predicting femto base station interference to be given from an adjacent femto base station to a terminal; predicting macro base station interference to be given from a macro base station to the terminal; determining transmission power for the terminal; and transmitting a downlink signal to the terminal on the basis of the transmission power, wherein the femto base station interference is predicted on the basis of a distance between serving femto base station and the adjacent femto base station and the transmission power of the adjacent femto base station, and the macro base station interference is predicted on the basis of a distance between serving femto base station and the macro base station and the transmission power of the macro base station. | 06-21-2012 |
20140315566 | METHOD AND APPARATUS FOR CONTROLLING INTERFERENCE IN WI-FI-INTEGRATED SMALL CELL ENVIRONMENT - Provided are a method and apparatus for controlling inter-cell interference. In accordance with the present invention, a Wi-Fi signal including interference control information is received from a neighboring cell, the interference control information is transmitted to a small cell transmission/reception module, and a small cell signal is transmitted or received by controlling inter-cell interference based on the interference control information. | 10-23-2014 |
20150055629 | METHOD AND APPARATUS FOR CONTROLLING INTERFERENCE BASED ON CARRIER AGGREGATION FOR SMALL BASE STATION - A carrier aggregation-based interference control method and apparatus for small base stations are disclosed. The present invention comprises setting a primary component carrier (PCC) as a first carrier and setting a secondary component carrier (SCC) as a second carrier, monitoring a signal-to-interference plus noise ratio (SINR) of the first carrier or the second carrier, and determining whether the SINR of the first carrier is smaller than a predetermined threshold. | 02-26-2015 |