BEIJING SAMSUNG TELECOM R & D CENTER Patent applications |
Patent application number | Title | Published |
20110269465 | HANDOVER METHOD AND APPARATUS IN MOBILE COMMUNICATION SYSTEM - A method for handover of User Entity (UE) by a source Base Station (BS) is provided. The method includes determining whether to handover the UE using an X2 interface, transmitting a handover request message to a target BS, the handover request message including Closed Subscriber Group (CSG) information of the target BS, and receiving a handover request acknowledgement message from the target BS, wherein the determining of whether to handover the UE using the X2 interface includes, if there is the X2 interface between the source BS and the target BS, and if the target BS does not support a CSG or the target BS supports a same CSG supported by the source BS, determining to perform the handover of the UE using the X2 interface, and obtaining the CSG information of the target BS through an X2 interface set up procedure. | 11-03-2011 |
20110243005 | Mobility cell measurement method and apparatus for mobile communications system - This invention provides a mobility cell measurement method and apparatus for a mobile communications system like as LTE-A. The method includes: performing inter-carrier synchronous transmission of a synchronous signal on at least two Component Carriers (CCs); sending information regarding one or more CCs among the at least two CCs that is capable of performing Carrier Aggregation (CA) with a carrier of a serving cell to a user equipment through higher-level signaling; and sending joint mobility measurement information to the user equipment of the serving cell, wherein the user equipment determines a CC for performing joint mobility measurement according to the information regarding the one or more CCs and the joint mobility measurement information and performs the joint mobility measurement on the determined CC. This increases the speed of the mobility measurement and reduces the power consumption of the user equipment. | 10-06-2011 |
20110235682 | Method and apparatus for determining reference signals in mobile communication system - Embodiments of the present invention provide a method and an apparatus for determining reference signals. A User Equipment (UE) obtains group hopping information and/or sequence hopping information of a UE-specific reference signal from cell-specific system information broadcasted by an eNB. The UE receives UE-specific control information transmitted by the eNB to the UE. The UE generates a UE-specific reference signal of a first slot according to the group hopping information and/or sequence hopping information of the broadcasted cell-specific reference signal. If the UE-specific control information indicates that group hopping and/or sequence hopping of UE-specific reference signals is disabled, the UE generates a UE-specific reference signal of a second slot in a same frame with the first slot according to the UE-specific reference signal of the first slot. The UE is able to determine the reference signals when multiple UEs share physical resource blocks. | 09-29-2011 |
20110090977 | METHODS FOR MAPPING AND DE-MAPPING DATA, TRANSMITTING DEVICE AND RECEIVING DEVICE - An apparatus and a method for mapping data and de-mapping data are provided. In the method, each modulated datum is mapped into two centrosymmetric Orthogonal Frequency Division Multiplexing (OFDM) subcarriers at the transmitting end, a certain functional transformation is performed on data in one of the two OFDM subcarriers, and original data may be restored at the receiving end according to data of the two centrosymmetric OFDM subcarriers. Exemplary embodiments of the invention also provide a transmitting device and a receiving device. By adopting embodiments of the invention, self-cancellation of interference among subcarriers may be implemented effectively, and the interference among subcarriers may be reduced. | 04-21-2011 |
20100097973 | METHOD AND APPARATUS FOR IDLE MODE NOTIFICATION IN CELLULAR COMMUNICATIONS SYSTEM - An apparatus and method for idle mode notification in a cellular communications system is provided. A user transmits, prior to entering an idle mode, a de-registration request message to a Base Station (BS) which then transmits a Dynamic Service Addition REQuest (DSA-REQ) message to the user and adds the user to a multicast group for the idle mode, and enters the idle mode. The BS transmits an idle mode notification to the user using a Multicast/Broadcast Service MAP (MBS_MAP), and the user receives the idle mode notification, wherein the user switches to a unicast carrier to perform network reentry if the idle mode notification is a network reentry notification. The idle mode notification is considered as a service of an MBS type. When a user enters the idle mode, the BS actively invites the user to join the multicast group for idle mode notification if the MBS operates on a dedicated carrier. | 04-22-2010 |
20100074129 | METHOD FOR SUPPORTING A NETWORK LOCATING A TARGET NODE - The supporting of a network locating a target node is disclosed. The supporting of a network locating a target node includes a User Equipment (UE) transmitting a measurement report message to a source evolved Node B (eNB), the measurement report message including a measurement result of signal quality of a target eNB; the source eNB transmitting a message to a core network node, the message including a type of the target eNB; if the target eNB is a Home Node B (HNB), the core network node transmitting a switching message to a target eNB GateWay (GW) or the target eNB. The Mobility Management Entity (MME) can determine whether the UE is allowed to access the target HNB, and the MME can locate the proper HNB GW. | 03-25-2010 |
20090172493 | METHOD AND DEVICE FOR DECODING LOW DENSITY PARITY CHECK CODE - An apparatus for decoding a Low Density Parity Check (LDPC) is provided. The apparatus includes a variable node message memory for storing a variable node message vector, a controller for controlling a node computing unit to read from and write to the variable node message memory and controlling an iteration process for the apparatus, and a node computing unit for updating a check node message and a variable node message, and determining a hard decision message, the node computing unit includes a variable node message generation unit for determining the variable node message for use in a check node message calculation unit according to the variable node message vector, a check node message calculation unit for updating the check node message, a variable node message updating unit for updating a corresponding variable node message, a hard decision calculation unit for determining the hard decision message for a corresponding variable node, and a parity check unit for determining a parity bit and outputting the parity bit to a decoding termination controller. | 07-02-2009 |
20080207273 | SLIDING-TYPE MOBILE PHONE WITH A SUPPLEMENTAL DISPLAY SECREEN - A sliding-type mobile device is provided. The sliding-type mobile device includes a base, a first display screen disposed on the base, a sliding section disposed above the base and mechanically coupled to the base such that the sliding section moves relative to the base, a second display screen disposed on the sliding section, a processor for controlling operations of the mobile device, and a controller for receiving data and at least one control signal from the processor, and for transmitting the received data to one of the first display screen and the second display screen according to information in at least one control signal. In a case where a user uses a sliding-type mobile device with a supplemental display screen, only a simple sliding operation is required to accomplish the operations of paging, entering function menus, browsing information, or the like. Consequently, time is saved and convenience is gained. | 08-28-2008 |