Patent application number | Description | Published |
20080227448 | APPARATUS AND METHOD FOR TRANSMITTING AN UPLINK PILOT USING A SCANNING INTERVAL IN A MOBILE COMMUNICATION SYSTEM - An apparatus and method for transmitting an UpLink (UL) pilot using a scanning interval in a mobile communication system are provided. The method includes receiving a scanning response message including information on a UL pilot channel allocation mode from a serving Base Station (BS), measuring each DownLink (DL) channel state using DL signals of one or more neighboring BSs and transmitting a UL pilot to each of the one or more neighboring BSs in the UL pilot channel allocation mode, during a scanning duration. Accordingly, both UL and DL Quality of Service (QoS) may be considered during a handover operation. | 09-18-2008 |
20090040959 | METHOD AND SYSTEM FOR RETRANSMITTING DATA IN A COMMUNICATION SYSTEM - A method and system for retransmitting data in a communication system are provided. In the retransmission method, a BS determines an automatic retransmission number for a multicast data frame according to the number of MSs of a multicast group, transmits the determined automatic retransmission number to the MSs of the multicast group, and repeatedly transmits the multicast data frame to the MSs until the number of transmissions of the multicast data frame is equal to the automatic retransmission number, irrespective of reception of information indicating whether the multicast data frame has been received from the MSs. Accordingly, resource consumption can be reduced and overhead can be decreased. | 02-12-2009 |
20090059858 | System and Method for requesting bandwidth allocation and allocating bandwidth in communication system - Disclosed is a method of requesting bandwidth allocation by an MS having at least two CIDs in a communication system, the method including the steps of detecting at least one CID needing the bandwidth allocation; when a plurality of CIDs are detected, generating a grant management subheader including a region for recording the total number of the CIDs needing bandwidth allocation and a region for recording bandwidth information of a generic MAC header CID, and a grant management subheader including, for each of the CIDs needing bandwidth allocation, other than the generic MAC header CID, a region for recording the order of a corresponding CID given in a MS CID list and a region for recording bandwidth information of the corresponding CID; and transmitting the generic MAC header with the grant management subheaders concatenated thereto to a BS. | 03-05-2009 |
20090069024 | Method for Requesting Bandwidth Allocation and Detecting Service Flow in Communication System - A method for requesting bandwidth allocation by a mobile station in a communication system is provided. The mobile station detects at least one Connection IDentifier (CID), bandwidth allocation for which is to be requested, generates a bandwidth request header when the number of the at least one detected CID equals one, and transmits the bandwidth request header to a base station, wherein the bandwidth request header includes a region for indicating a first CID representing basic information for identification of the mobile station, a region for indicating a ranking of the detected CID, and a region for indicating information about bandwidth requested for the detected CID. | 03-12-2009 |
20090073911 | FEEDBACK METHOD FOR MULTICAST SERVICE IN WIRELESS COMMUNICATION SYSTEM, AND A SYSTEM IMPLEMENTING THE METHOD - A method for providing multicast service by a base station in a wireless communication system and a system implementing the method are provided. The method includes receiving one or more multicast service request messages including downlink channel state information from one or more mobile stations, determining the number of mobile stations which have requested a multicast service, determining a modulation and coding scheme (MCS) based on a mobile station, which has transmitted lowest channel quality information, among the one or more mobile stations when the determined number of mobile stations exceeds a preset value, and providing the multicast service through a t | 03-19-2009 |
20090125776 | Method for providing multicast service in a wireless communication system and system thereof - A method is provided for providing a multicast service by a base station (BS) in a wireless communication system. The method includes transmitting an N | 05-14-2009 |
20090135805 | System and method for connection identifier synchronization in a communication system - A method is provided for synchronizing Connection IDentifiers (CIDs) of a first station and a second station in a communication system. The CID synchronization method includes sending, by the first station, a first message for requesting addition of a service flow identified by a CID to the second station; sending, by the second station, a second message which is a response message to the first message, and at the same time, setting a number of a frame where the second message is transmitted as a first start frame number; sending, by the first station, a third message for acknowledging receipt of the second message to the second station, and at the same time, setting a number of a frame where the third message is transmitted as a second start frame number; performing, by each of the first station and the second station, a modulo operation on a frame having the first or second start frame number and its succeeding frames using a positive integer for each frame, and detecting a number of a frame where a result value of the modulo operation becomes zero (0); and simultaneously updating CID lists of the first station and the second station at a frame having the detected frame number with regard to a CID of the added service flow. | 05-28-2009 |
20090186594 | SYSTEM AND METHOD FOR PROVIDING AN EMERGENCY SERVICE IN A COMMUNICATION SYSTEM - A system and method for providing an emergency service in a communication system are provided. The method includes transmitting a request message for requesting connection setup for service provision from a first station to a second station, the request message including a first indicator indicating an emergency service; receiving a response message in response to the request message by the first station from the second station, the response message including service flow connection information for provision of the emergency service and a second indicator indicating that it is a response to the request message, acquiring the service flow connection information from the response message and transmitting a message acknowledging acquisition of the service flow connection information to the second station, and setting a connection for providing the emergency service. | 07-23-2009 |
20090186595 | SYSTEM AND METHOD FOR PROVIDING AN EMERGENCY SERVICE IN A COMMUNICATION SYSTEM - A system and method for providing an emergency service in a communication system is provided. A method for providing an emergency service by an idle mode Mobile Station (MS) in a communication system includes receiving, from a Base Station (BS), a broadcast message including information on a time duration in which an emergency service message will be transmitted after waking up at a start timing point of a paging listening interval, transitioning into an idle state when a start timing point of the time duration in which the emergency service message will be transmitted is later than a timing point at which the paging listening interval is terminated, and waking up at the start timing point of the time duration in which the emergency service message will be transmitted after transitioning into the idle state. | 07-23-2009 |
20090303953 | METHOD AND APPARATUS FOR SUPPORTING IDLE MODE OF MOBILE STATION IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for supporting an idle mode of a Mobile Station (MS) in a superframe-based wireless communication system are provided. In a method for operating an MS to support an idle mode in a superframe-based wireless communication system, a paging listening interval is determined based on a Broadcast CHannel (BCH) information Transmit (TX) interval. BCH information including paging information is received during the paging listening interval. The inclusion/non-inclusion of a paging advertisement (MOB_PAG-ADV) message is detected based on the BCH information. | 12-10-2009 |
20100069069 | Apparatus and method for automatically searching for low-power base station supporting access of registered user in mobile 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. | 03-18-2010 |
20100124179 | Method and apparatus for identifying types and access modes of neighbor cells in femtocell environment - In a mobile communication system including macro cells and femtocells, a neighbor cell identification method includes: transmitting, by a neighbor cell that is a macro cell or a femtocell, a neighbor cell identifier containing information regarding the type and access mode of the neighbor cell to a user equipment. The user equipment identifies, after receiving the neighbor cell identifier the type and access mode of the neighbor cell. The user equipment also accesses the neighbor cell according to the identification result. | 05-20-2010 |
20110019644 | METHOD FOR SWITCHING SESSION OF USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM AND SYSTEM EMPLOYING THE SAME - A system and method for switching a session of a User Equipment (UE) in a wireless communication system are provided. According to the method, if the UE performs a handover from a macro base station of a macro cell to a femto base station of a femto cell, a femto base station transmits a path switch request message, which includes a serving gateway relocation Information Element (IE), to a Mobility Management Entity (MME) of the macro cell, in order to request a switching from an existing session of the UE to a new session managed by the femto base station. Then, in response to the path switch request message, the MME switches the existing session of the UE to the new session and transmits a path switch approval message to the femto base station. The serving gateway relocation IE includes information requesting relocation of a serving gateway of the UE to a femto serving gateway within the femto cell. | 01-27-2011 |
20110190005 | METHOD AND APPARATUS FOR DETERMINING LOCATION OF USER EQUIPMENT IN A COMMUNICATION SYSTEM - A method and apparatus for determining a location of a User Equipment (UE) in a communication system. A Base Station (BS) connected to a plurality of antennas by cable receives from each of the antennas reception signal information related to an uplink signal transmitted from the UE, identifies an antenna having a partial service area in which the UE is located, using the reception signal information, and determines the partial service area of the identified antenna to be the location of the UE. | 08-04-2011 |
20110230187 | COOPERATIVE SCANNING-BASED CELL RESELECTION METHOD AND SYSTEM IN WIRELESS COMMUNICATION SYSTEM - A cell reselection method and system based on a cooperative scanning of the mobile relay station and mobile stations is provided for facilitating cell reselection procedure in a Broadband Wireless Access (BWA) system. The cooperative scanning method for a moving wireless network including a mobile relay station and at least one mobile station according to the present invention includes transmitting, at the moving wireless network, a scanning request with cooperative scanning duration to a serving base station; assigning, when a scanning response, neighbor base stations to the mobile relay station and at least one mobile station; scanning, at the mobile relay station and the at least mobile station, the assigned neighbor base stations; and transmitting scanning results to the serving BS station. | 09-22-2011 |