Patent application number | Description | Published |
20140192918 | METHOD AND APPARATUS FOR REPORTING DOWNLINK CHANNEL STATE - A method of reporting a channel state to a base station supporting downlink multiple input multiple output in a wireless communication system includes measuring a downlink channel based on a downlink signal received from the base station, and reporting a codebook index for precoding of the downlink signal according to the measurement of the downlink channel. The codebook for precoding includes an improved codebook (hereinafter, referred to as an improved 4Tx codebook) having a dual structure composed of a codebook for wideband and a codebook for subband, for 4 transmit (4Tx) antenna ports, and the improved 4Tx codebook includes sub-codebooks obtained by sub-sampling the codebook for subband according to priority. | 07-10-2014 |
20140376461 | METHOD AND APPARATUS FOR TRANSMITTING INTERFERENCE INFORMATION - A method for receiving interference cancellation information of a mobile station (MS), which is performed by the MS, includes receiving a virtual radio network temporary identifier (V-RNTI) set including a plurality of V-RNTIs for cancellation of an interference signal from a serving base station, each of the plurality of V-RNTIs being associated with RNTIs of one or more MSs (hereinafter, referred to as “neighboring MSs) served by a neighboring base station, and receiving a downlink control channel for a first neighboring MS of the neighboring MSs using at least one V-RNTI of the V-RNTI set. The downlink control channel is a double CRC-downlink control channel with a first cyclic redundancy check (CRC) bit scrambled by an RNTI of the first neighboring MS and a second CRC bit scrambled by the at least one V-RNTI and is received in a specific subframe. | 12-25-2014 |
20150049706 | Method for Reporting Downlink Channel State and Apparatus Therefor - Provided is a method for reporting, by a user equipment, channel state to an eNodeB in a wireless communication system, the method comprising: receiving a request for an aperiodic channel state report and information on a configuration of a mode of the aperiodic channel state report; and transmitting the aperiodic channel state report through an uplink data channel according to the request and the configuration, wherein, if a bandwidth allocated for uplink is less than a predetermined bandwidth, only the aperiodic channel state report is transmitted through the uplink data channel, and wherein the predetermined bandwidth is set per mode of the aperiodic channel state report. | 02-19-2015 |
20150071191 | Method for Coordinated Scheduling in Wireless Communication System and Apparatus Therefor - In an aspect of the present application, provided herein is a method for transmitting signals for coordinated scheduling in a wireless communication system, the method performed by a base station and comprising: transmitting, to a neighbor base station, information on a transmission scheme in a specific channel state information-interference measurement (CSI-IM) resource; and receiving, from a mobile terminal served by the base station, a measurement result with respect to a downlink signal transmitted from the neighbor base station according to the transmission scheme in the specific CSI-IM resource, wherein the transmission scheme is determined according to whether there is downlink data to be transmitted by the base station in a subframe to which the specific CSI-IM resource belongs and/or whether the mobile terminal configured with the specific CSI-IM resource is allocated a single CSI process or multiple CSI processes. | 03-12-2015 |
20150156785 | METHOD FOR INTEREFERENCE CANCELLATION AND APPARATUS THEREFOR - A method for cancelling an interference signal using interference information in a wireless communication system is performed by a User Equipment (UE) and includes receiving continuity information of an interference signal transmitted in a specific subframe, estimating a characteristic of the interference signal transmitted in the specific subframe, using the continuity information, and performing interference cancellation based on the estimated characteristic of the interference signal. The continuity information includes interference characteristic information or interference transition information at a specific frequency resource in the specific subframe. | 06-04-2015 |
20150181464 | METHOD AND APPARATUS FOR RECEIVING OR TRANSMITTING INTERFERENCE INFORMATION - A method for receiving information for interference cancellation of a user equipment (UE) includes detecting downlink control information including interference control information for a specific resource block (RB) scheduled for the UE by using an index of the specific RB, wherein the interference control information for the specific RB includes control information related to interference signal in the specific RB and indicates that the interference control information for the specific RB is the same as interference control information for one or more RBs having a series of indices subsequent to the index of the specific RB, and performing cancellation of interference signal corresponding to the interference control information in the specific RB and the one or more RBs using the interference control information for the specific RB. | 06-25-2015 |
20150189667 | METHOD AND APPARATUS FOR PERFORMING INTERFERENCE CANCELLATION - A method and apparatus for performing interference cancellation are disclosed. A method for performing interference cancellation of a user equipment (UE) includes: receiving interference control information including an index for indicating a subset of one or more interference information elements, the interference control information being scrambled by a specific identifier (ID) which decided a subset configuration of the one or more interference information elements; acquiring a subset of the one or more interference information elements corresponding to the index according to the subset configuration of the one or more interference information elements decided by the specific identifier (ID); and attempting to perform interference cancellation using the subset of the one or more interference information elements. | 07-02-2015 |
20150215017 | METHOD AND APPARATUS FOR CANCELLING INTERFERENCE - A method and apparatus for cancelling interference are disclosed. The method for cancelling interference, performed by a User Equipment (UE) includes receiving interference transmission layer restriction information about a neighbor Base Station (BS) transmitting an interference signal or information about the number of antenna ports used in transmitting the interference signal by the neighbor BS, detecting control information about the interference signal using the interference transmission layer restriction information, and removing the interference signal using the detected control information. The control information includes a field related to precoding of the interference signal determined differently according to a field related to Multiple User Multiple Input Multiple Output (MU-MIMO) included in the interference transmission layer restriction information, the information about the number of antenna ports, or the control information. | 07-30-2015 |