Patent application number | Description | Published |
20090298504 | METHOD FOR ACQUIRING INFORMATION FOR MEDIA INDEPENDENT HANDOVER - This document is related to a method for acquiring information for media independent handover. More specifically the method comprises: submitting a media independent handover (MIH) query to a base station (BS) by sending a first request message, and receiving a response to the MIH query. Because the first request message is used for authorization, preferably the PKM message, the MS can acquire information for handover between heterogeneous networks before the MS finishes the network entry. | 12-03-2009 |
20100118771 | METHOD OF TRANSMITTING PROTOCOL MESSAGE FOR MEDIA INDEPENDENT HANDOVER IN WIRELESS ACCESS SYSTEM - Disclosed is a method of transmitting a media independent handover (MIH) protocol message in a wireless access system. A method for a mobile node to transmit an MIH message in a wireless access system includes receiving a primitive including prescribed information from a first entity, generating the MIH message by mapping a transport address to the primitive, and transmitting the MIH message to one or more network nodes. According to the present invention, transmission defects of the message are effectively reduced by accurately mapping an MIHF ID and a transport address. | 05-13-2010 |
20100131663 | METHOD FOR PRE-CONFIGURATION OF IP ADDRESS IN MOBILE COMMUNICATION SYSTEM - A handover method between heterogeneous networks is disclosed. A method for pre-configuration of an IP address allows a mobile terminal to perform a handover between heterogeneous networks. Methods for relaying messages for pre-configuration of IP address and a method for relaying messages for performing MIH based on pre-configuration of IP address are also disclosed. | 05-27-2010 |
20100135256 | METHOD FOR ALLOCATING MULTIPLE RADIO COMMUNICATION PERIODS - A method for allocating multiple radio communication periods to an MS supporting co-existence mode is disclosed. The method includes transmitting a co-existence mode request message to a BS by the MS, receiving information about the position of a start frame for the co-existence mode by a co-existence mode response message as a response to the co-existence mode request message from the BS by the MS, and receiving information about an allocated Wi-Fi beacon reception period by an unsolicited co-existence mode response message in the start frame from the BS by the MS. A frame allocation pattern for allocating periods for communications with a Bluetooth or Wi-Fi system using a frequency band adjacent to that of an IEEE 802.16m system can be provided according to an IEEE 802.16m frame structure, and an MS with multiple radio interfaces can communicate with each system reliably, while minimizing interference between systems. | 06-03-2010 |
20100208674 | METHOD FOR RECEIVING PREAMBLE FROM OTHER COMMUNICATION SYSTEM AND METHOD FOR ADAPTIVELY CHANGING THE MEASUREMENT GAP TO DISCOVER THE OTHER COMMUNICATION SYSTEM - A method for receiving a preamble signal of another communication system and a method for adaptively changing a measurement gap to discover another communication system are disclosed. A method for receiving a preamble signal from a base station of a second communication system by a communicating mobile station in a first communication system includes receiving measurement gap scheduling information from a base station of the first communication system, if a preamble signal of the second communication system is not received during an assigned measurement gap, changing the measurement gap, and receiving the preamble signal of the second communication system during the changed measurement gap. | 08-19-2010 |
20100215020 | METHOD OF PACKET REORDERING AND PACKET RETRANSMISSION - A packet reordering method and a packet transmission method to implement reliable data communication are disclosed. The method of transmitting packets at a serving base station in case of a mobile station performing handover include, receiving a series of packets from an upper layer entity, and transmitting the series of packets one after the other to a target base station, wherein a packet of the series of packets includes an information field which represents whether the packet is the last transmitted packet. When the mobile station performs the I-RAT handover, the target serving station pre-reorders PDU packets, and transmits the reordered PDU packets to the mobile station, such that the mobile station can quickly transmit data without reordering the packets. | 08-26-2010 |
20100216474 | METHOD FOR SUPPORTING MOBILITY OF MOBILE TERMINAL, AND MOBILE TERMINAL THEREOF - A method for supporting mobility of a mobile station and the mobile station which supports the mobility are disclosed. The method of supporting the mobility of the mobile station includes receiving cell reselection information and neighbor cell information from a base station (BS) of a present cell, wherein the cell reselection information includes thresholds for determining whether the quality of the other RAT cell shall be measured or not, wherein the neighbor cell information includes a frame duration code and a frame number of a downlink frame in the other RAT cell, wherein the frame duration code indicates the start preamble of the downlink frame; determining whether a mobile station (MS) shall measure the quality of the other RAT cell or not using the thresholds; and measuring the quality of the other RAT cell and reselecting a cell or transmitting the measured result to the BS through a measurement report message according to the measured result, if it is determined that the MS would measure the quality of the other RAT cell. Accordingly, since the mobility of the mobile station between the E-UTRAN network and the other RAT cell is supported, the mobile station can continuously receive a service while maintaining current service quality although a user moves to the other RAT cell. | 08-26-2010 |
20100304743 | METHOD FOR MANAGING NEIGHBOR FEMTO BS LIST IN A BROADBAND WIRELESS ACCESS SYSTEM - A method for updating a neighbor list at a femto Base Station (BS) is disclosed. The method includes broadcasting a first broadcast message including information about an unavailable time interval during which scheduling is not performed for Mobile Stations (MSs), scanning at least one neighbor BS during the unavailable time interval, and updating the neighbor list according to a result of the scanning. | 12-02-2010 |
20100323749 | METHOD FOR PERFORMING DOWNLINK/UPLINK HANDOVER - A method for performing a handover in a mobile communication system, which is capable of independently performing an uplink handover and a downlink handover, is disclosed. An uplink channel status of a base station is checked and the uplink handover to a base station having a good uplink channel status is performed. A downlink channel status of a base station is checked and the downlink handover to a base station having a good downlink channel status is performed. Accordingly, an uplink base station and a downlink base station may be different from each other. Transmission/reception efficiency can be improved by independently performing the handover. | 12-23-2010 |
20110151859 | APPARATUS AND METHOD FOR DISCOVERING CLOSED SUBSCRIBER GROUP TERMINAL IN FEMTO CELL - A method for operating an overlay macro base station (BS) for discovering a closed subscriber group (CSG) user equipment (UE) in a femto cell, includes: receiving a ranging request message including a CSG ID information from a UE which attempts a network entry; and after receiving the ranging request message from the UE, recommending the femto cell to monitor uplink signaling of a CSG UE belonging to the overlay macro BS. | 06-23-2011 |
20110201311 | METHOD OF INITIAL ACCESS IN A WIRELESS COMMUNICATION SYSTEM - A method of initial access in a wireless communication system is disclosed. A method of initial access of a mobile station in a wireless communication system with femtocells comprises selecting a base station to which the mobile station requests information of femto cell base stations which can serve the mobile station and exist around the mobile station through scanning downlink channel; and requesting the selected base station the information of the femto cell base stations. | 08-18-2011 |
20110243108 | METHOD FOR ENABLING A TERMINAL TO EFFICIENTLY DETECT AND SEARCH FOR A FEMTO BASE STATION - A method for enabling a mobile station (MS) to efficiently detect and search for a femto base station is disclosed. The method comprises the steps of receiving a signal including information of a femto base station; and searching for the femto base station on the basis of the received information, wherein said received information is a sequence including at least one of the following: the entirety or a part of a femto base station ID (Identity), the entirety or a part of a cell ID, a sector ID, the entirety or a part of a CSG (Closed Subscriber Group) ID, and a frequency allocation index. In the step of receiving femto base station information, a preamble and data containing information on the femto base station are received. In the step of detecting the femto base station, the femto base station is separately detected on the basis of the received information. Here, the entirety or a part of the preamble sequence of the femto base station which is used for the separation of the femto base station is reused as a scrambling sequence for said data. | 10-06-2011 |
20110287759 | METHOD FOR OPERATING SERVICE UNAVAILABLE MODE OF FEMTO BASE STATION - The present invention relates to a broadband wireless access system, and more particularly, to a method for efficiently operating a service unavailable mode of Femto base station. The method for operating a service unavailable mode of Femto base station in the broadband wireless access system according to one embodiment of the present invention, comprises the steps of: determining whether the preset condition for the operation of a service unavailable mode is satisfied; and broadcasting service unavailable mode information for indicating the state of service unavailable mode of the Femto base station in accordance with the result of determination on the preset condition. | 11-24-2011 |
20120008596 | METHOD AND APPARATUS FOR HANDOVER IN A MOBILE COMMUNICATION SYSTEM - The present invention relates to a handover method for a mobile communication system. The handover method according to the present invention comprises the steps of: receiving from a serving base station a handover command message, the handover command message containing target base station information, information on an available interval enabling data transmission/reception to/from the serving base station during handover, information on an unavailable interval not enabling data transmission/reception during handover, and information on the time of disconnection of a link connected to the serving base station; performing a network entry process with the target base station; transmitting status information to the serving base station when an error has occurred in the network entry process; receiving from the serving base station a status information response message containing available interval and unavailable interval reset information and link disconnection time reset information for extending the link disconnection time; enabling the serving base station to provide a data transmitting/receiving service during the available interval; and re-performing the network entry process with the target base station, and disconnecting the link to the serving base station at the reset link disconnection time. | 01-12-2012 |
20120020329 | METHOD FOR ACQUIRING INFORMATION FOR MEDIA INDEPENDENT HANDOVER - This document is related to a method for acquiring information for media independent handover. More specifically the method comprises: submitting a media independent handover (MIH) query to a base station (BS) by sending a first request message, and receiving a response to the MIH query. Because the first request message is used for authorization, preferably the PKM message, the MS can acquire information for handover between heterogeneous networks before the MS finishes the network entry. | 01-26-2012 |
20120077486 | METHOD OF LOW DUTY MODE OPERATION IN A FEMTO BASE STATION IN CONSIDERATION OF A FEMTO CELL TYPE - The present invention relates to a broadband wireless access system including a femto cell, and more particularly, to a method of low duty operation in a femto base station. According to one embodiment of the present invention, in a broadband wireless access system, a method of a low duty mode operation of a femto base station saving power includes the steps of determining a low duty mode pattern to be performed by the femto base station according to a preset reference and performing the low duty mode operation according to the determined pattern. In this case, the preset reference can include at least one selected from the group consisting of a battery level, an available resource status and a subscriber type of the femto base station. | 03-29-2012 |