Patent application number | Description | Published |
20090196224 | Base station and scheduling method used in base station - Disclosed in the present invention are base stations and scheduling methods used in base stations. The base station uses a multi-user multi-input and multi-output method, and is characterized in comprising: a storing means for storing codebook vector group information relevant to a combination of codebook vectors capable of being used as a pre-coding group, the codebook vector group information comprising an index of the combination of codebook vectors capable of being used as a pre-coding group; a pre-coding matrix element selecting means for selecting codebook vectors to be taken as elements of a pre-coding matrix; a pre-coding matrix index determining means for determining an index, to which a combination of the codebook vectors selected by the pre-coding matrix element selecting means corresponds, in accordance with the codebook vectors to be taken as elements of a pre-coding matrix as selected by the pre-coding matrix element selecting means and with reference to the codebook vector group information; and a pre-coding matrix index transmitting means for transmitting the index of the combination of the codebook vectors determined by the pre-coding matrix index determining means. | 08-06-2009 |
20090323792 | Method and Apparatus for Designing Modulation and Coding Set of Communication System - The present invention provides method and apparatus for designing modulation and coding set of communication System. The method for designing modulation and coding set designs a proper set of modulation and coding schemes (MCS), based on probability distribution of the quality of received signal in the communication system, so as to optimize the whole performance of the communication system. The method comprises the steps of: acquiring the probability distribution of the quality of the received signal in the communication system; performing a calculation on the target performance of the communication system based on the acquired probability distribution of the quality of the received signal and a plurality of MCSs, to design a proper set of MCSs for the communication system, so that a region where the probability of the quality of the received signal appears more frequently are provided with more levels of the MCSs. | 12-31-2009 |
20100039926 | Transmission Resource Assigning Method, Feedback Method And Processing Method For Response Signals - The present invention discloses a transmission resource assignment method for response signals, a feedback method of response signals and a processing method of response signals. The transmission resource assignment method for response signals according to the present invention includes the steps of: determining a list of mobile stations required to transmit response signals currently; determining the number of the response signals required to be transmitted by each mobile station; and assigning a frequency-domain sequence and a time-domain sequence for each mobile station to transmit the response signals; wherein for multiple mobile stations assigned with the same frequency-domain sequence, the time-domain sequence assigned to the mobile station required to transmit multiple response signal groups is divided into multiple subsequences to be used to transmit the multiple response signal groups of the mobile station respectively; and parts of the time-domain sequences of different mobile stations corresponding to the multiple subsequences are orthogonal to each other respectively. | 02-18-2010 |
20100100787 | TRANSMISSION DATA GENERATING APPARATUS AND RECEIVER - This invention proposes a transmission data generating apparatus for use in a transmitter of a communication system, which transmission data generating apparatus comprises a redundancy data obtaining unit for obtaining redundancy data of information data which was transmitted to a receiver and was not received successfully by the receiver; a new data obtaining unit, for extracting new data, which has not been transmitted to the receiver; and a combination unit, for combining the redundancy data and the new data to form a transmission data to be subsequently transmitted to the receiver. This invention enhances the success rate of decoding the new data in primarily transmitted data and retransmitted data, and enhances system throughput. | 04-22-2010 |
20100190433 | RELAY DEVICE AND WIRELESS COMMUNICATION METHOD THEREOF - The invention provides a relay device and a wireless communication method thereof. The A wireless communication method for a relay device includes the following steps: receiving a first signal destined for a second communication device from a first communication device; decoding the received first signal and determining whether a decoding result is correct; generating a first decoding response signal indicating whether the decoding result of the first signal is correct; and sending the first decoding response signal to the first communication device and the second communication device. | 07-29-2010 |
20120008545 | WIRELESS COMMUNICATION SYSTEM AND DATA TRANSMISSION METHOD THEREOF - The invention provides a wireless communication system and a data transmission method thereof. The wireless communication system includes a base station, a mobile station and a relay station which is transparent to the mobile station. The method includes that: the base station receives a first signal sent from the mobile station, and decodes the first signal. When the result of the decoding is incorrect, the base station sends a response to the relay station for indicating that the decoding is incorrect, but it does not send a response to the mobile station for indicating that the decoding to be incorrect. | 01-12-2012 |
20120009980 | BASE STATION AND MOBILE STATION - A base station and a mobile station, the base station includes common antennas configured to transmit signals to all mobile stations (UEs) served by the base station; a special antenna to transmit a signal to a UE which is served by the base station and supports the special antenna; a sub-frame selecting unit to select a sub-frame for transmitting a common pilot of the special antenna in the current frame; a resource block (RB) selecting unit to select a RB for transmitting the common pilot, in the sub-frame for transmitting the common pilot selected by the sub-frame selecting unit; a notifying unit to notify the sub-frame and RB for transmitting the common pilot antenna selected by the UE supporting the special antenna in a cell; and a transmitting unit to transmit a signal having the common pilot in the RB selected by the RB selecting unit. | 01-12-2012 |
20120033723 | METHOD, PRE-CODING APPARATUS AND WIRELESS COMMUNICATION SYSTEM FOR MULTIPLE-INPUT MULTIPLE-OUTPUT COLLABORATIVE COMMUNICATION - A method for multiple-input multiple-output (MIMO) collaborative communication in a wireless communication system includes at least one user equipment and M base stations performing collaborative communication with the user equipment. Here, M is an integer that is greater than or equal to 2. The method includes the following processes for each user equipment: a first level of MIMO pre-coding process is performed for each base station to acquire each first level of pre-coding matrix corresponding to each base station; a second level to the X-th level of MIMO pre-coding process is performed sequentially to acquire the second level to the X-th level of pre-coding matrices of the corresponding base stations. Here, X is an integer that is greater than or equal to 2. A pre-coding device, a user equipment and a wireless communication system related to the method are also provided. | 02-09-2012 |
20120140810 | METHOD AND APPARATUS FOR GENERATING A PRECODING MATRIX CODEBOOK GROUP - A method and an apparatus for generating a precoding matrix codebook group are provided by the present invention. The method includes: a step for generating a channel matrix set; a step for generating a performance parameter matrix; and a step for generating a precoding matrix codebook group: based on the generated performance parameter matrix, according to contribution of every precoding matrix to the performance parameter of the communication system, ranking the precoding matrices in precoding matrix universal set, so as to achieve an ordered precoding matrix universal set as the precoding matrix codebook group. A method for assigning a precoding matrix for a multi-antenna communication system, a method for transmitting data for a multi-antenna communication system, a base station and a mobile station thereof are provided by the present invention. | 06-07-2012 |
20120147792 | RELAYING NODE, TIME DIVISION DUPLEX COMMUNICATION SYSTEM AND COMMUNICATION METHOD - A relay node, time division duplex communication system and communication method are disclosed. The communication system comprises a base station, mobile stations and the relay node. The relay node will not be in receiving and transmitting state synchronously. The communication method comprises that the relay node receives a first signal from the base station in a predetermined downlink subframe of a frame and transmits a second signal to the base station in a predetermined uplink subframe of the frame, wherein the first signal is a response signal for the second signal or the second signal is a response signal for the first signal | 06-14-2012 |
20120170636 | METHOD AND DEVICE FOR GENERATING PRE-CODING MATRIX CODEBOOK - A method and a device for generating a precoding matrix codebook used in a multi-antenna communication system that includes determining an initial precoding matrix codebook consisted of L precoding matrixes; dividing a channel set into L channel groups being in one-to-one correspondence to the precoding matrix of the initial precoding matrix codebook; selecting a precoding matrix which optimally matches the channel group, from the precoding matrix universal set, to form a new precoding matrix codebook; judging whether the initial precoding matrix codebook and the new precoding matrix codebook are same; adopting the new precoding matrix codebook as the initial precoding matrix codebook, and if the initial and new precoding matrix codebook are not same, return to precoding; and adopting the new precoding matrix codebook as a precoding matrix codebook to be used in the multi-antenna communication system if the initial and new precoding matrix codebook are same. | 07-05-2012 |
20120189082 | BASE STATION, MULTI-ANTENNA COMMUNICATION SYSTEM AND COMMUNICATION METHOD THEREOF - A User equipment selecting first user equipment in a mode of precoding transmission and second user equipment in a mode of diversity transmission; a parameter determining a modulation mode, the number of transmission layers and a precoding matrix according to channel quality information, precoding matrix information and number of transmission layers sent from the first user equipment and channel quality information and number of transmission layers sent from the second user equipment; according to the modulation mode and the number of transmission layers, generating first and second symbol sequence from first and second source data; hierarchically modulating the first and the second symbol sequence to generate a mixed symbol sequence; layer mapping and precoding for the mixed symbol sequence to generate transmission signals; and transmitting the precoding matrix and the number of transmission layers to the second user equipment; sending the transmission signals to the first and second user equipments. | 07-26-2012 |
20120213169 | METHOD AND APPARATUS FOR IMPLEMENTING DOWNLINK MULTIPLE-INPUT MULTIPLE-OUTPUT TRANSMISSION - User scheduling used in a downlink multiple-input-multiple-output (MIMO) transmission, including with respect to each of user groups in which the users having the same Precoding Matrix Indicator (PMI), causing to complement each other based on a predetermined scheduling rule, according to the information fed back by the users in a single-user feedback manner of the SU-MIMO, to form a candidate user set; and selecting a scheduled MU-MIMO transmission user set from all the candidate user sets. User feeding back and user selection and scheduling used in a downlink MIMO transmission is further provided and includes selecting and scheduling, based on a predetermined scheduling rule, according to at least two CQIs fed back by each user, so as to determine a scheduled MU-MIMO transmission user set. | 08-23-2012 |
20120275415 | METHOD AND APPARATUS FOR CONVEYING DOWNLINK SCHEDULING SIGNALING - A method and an apparatus for conveying downlink scheduling signaling. The method comprises: generating a plurality of masking sequences corresponding to a plurality of predetermined downlink scheduling information including downlink physical resource assignment indicating information or power assignment information for a Demodulation Reference Signal (DMRS); and selecting a corresponding masking sequence from the plurality of masking sequences based on downlink scheduling information to be notified to a User Equipment (UE), and masking a Cyclic Redundancy Check (CRC) of a corresponding downlink control channel of the user equipment with the selected masking sequence for transmission. | 11-01-2012 |
20120281659 | METHOD AND DEVICE FOR FEEDING BACK SPATIAL CHANNEL STATE - A method for feeding back spatial channel state and a device for feeding back spatial channel state are disclosed by the invention. The method for feeding back spatial channel state according to an embodiment of the present invention includes: determining the probability of being scheduled of the spatial channel; determining feedback information based on the probability of being scheduled of the spatial channel; and transmitting the determined feedback information; wherein more feedback information is used for the spatial channel having high probability of being scheduled than that of the spatial channel with low probability of being scheduled. | 11-08-2012 |
20120287966 | Code Generating Apparatus, Reference Signal Generating Apparatus, and Methods thereof - A demodulation reference signal generator includes a non-correlation sequence generator to generate a non-correlation sequence for RS of a first resource block; a first spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; a second spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, using a second group of Codes; the first and second frequency resources are adjacent frequency resources used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and a mapping unit to map the spectrum-spread elements to the first and second frequency resources. | 11-15-2012 |
20120294257 | METHOD, BASE STATION AND CORRESPONDING MOBILE STATION FOR OBTAINING DOWNLINK CHANNEL DIRECTIONAL INFORMATION - Disclosed in the present invention is a method in the Multiple Input Multiple Output system for obtaining downlink channel directional information. The method includes steps: a base station receives downlink channel directional information which is fed back by a mobile station during the feedback period, and determines the relation between an uplink channel directional information and the received downlink channel directional information; the base station also estimates the downlink channel directional information of non-feedback sub-frame by use of the relation, those non-feedback sub-frame are not fed back during the feedback period. Furthermore, a base station and corresponding mobile station in MIMO system are also provided in the present disclosure. | 11-22-2012 |
20130016639 | METHOD AND APPARATUS FOR PERFORMING CARRIER MANAGEMENT IN CARRIER AGGREGATION SYSTEM - A method and device for carrier management in a carrier aggregation system, includes signaling which carries an additional carrier measurement indication sent to a User Equipment (UE); a measurement report received from the UE; when the downlink traffic of the UE increases, if the recorded carriers in the current downlink carrier set of the UE can not meet the requirement of the downlink traffic data rate, according to the additional carrier measurement report, at least one additional carrier is configured and activated, and the UE is notified to perform the corresponding configuration operation. In addition, according to the measurement result and the change in the downlink traffic of the UE, the base station can also perform the deactivation, activation replacement and removal of the additional carrier for the user, and notify the UE to perform the corresponding configuration operations. | 01-17-2013 |
20130044833 | METHOD FOR FEEDING BACK PRECODING MATRIX INFORMATION AND MOBILE STATION THEREOF - A method for feeding back pre-coding matrix information and a mobile station thereof are provided. The method includes: determining multiple kinds of pre-coding matrix information corresponding to multiple multi-input multi-output (MIMO) modes; and feeding back multiple kinds of pre-coding matrix information. The present invention can feedback pre-coding matrix information adapting for multiple multi-input multi-output modes. | 02-21-2013 |
20130121318 | RADIO COMMUNICATION SYSTEM CHANNEL STATE INFORMATION FEEDBACK METHOD AND DEVICE - A method for Channel State Information (CSI) feedback in a wireless communication system includes: determining parameters required for the CSI feedback in a first wireless communication system, so that a feedback structure of the first wireless communication system in Physical Uplink Control Channel (PUCCH) is based on a feedback structure of a second wireless communication system in the PUCCH; notifying the parameters to a user equipment; transmitting a Channel State Information Reference Symbol (CSI-RS) to the user equipment periodically, so that the user equipment calculates the CSI required to be fed back; and receiving the CSI fed back by the user equipment according to the feedback structure of the first wireless communication system in the PUCCH in response to the CSI-RS, wherein information fed back for each BP is information obtained by jointly encoding optimum subband Channel Quality Information (CQI) with optimum subband Pre-encoding Matrix Information (PMI) in the BP. | 05-16-2013 |
20130136084 | METHOD, MOBILE STATION AND MULTI-CARRIER COMMUNICATION SYSTEM FOR TRANSMITTING UPLINK RESPONSE SIGNAL - A method and mobile station for transmitting uplink response signal are provided. A method for transmitting uplink response signal in a multi-carrier communication system is provided, in the multi-carrier communication system, each uplink carrier is associated with a group of downlink carriers, the group of downlink carriers are part of all downlink carriers in the multi-carrier communication system. The method includes distributing uplink control channel resource for each downlink carriers associated with an uplink main carrier in the uplink main carrier; according to a response signal state, selecting uplink control channel resource from the distributed uplink control channel resource for transmitting uplink response signal and selecting modulated symbol mapping; and transmitting the uplink response signal by using the selected uplink control channel resource and the modulated symbol mapping. | 05-30-2013 |
20130137447 | INTER-CELL INTERFERENCE COORDINATION METHOD AND DEVICE FOR CONTROL CHANNEL AND DATA CHANNEL - An inter-cell interference coordination for a control channel where a base station of a first cell receives information, that is needed during allocating control channel resources to each user of a second cell that needs interference coordination, from a base station of the second cell, determines the control channel resources which will be allocated to the users of the second cell that need interference coordination, allocates the control channel resources used by the users of the first cell, judges whether search spaces of the control channel resources that are allocated to the users of the first cell and second cell satisfy an orthogonal requirement, and if not, forbids the users of the first cell to use the control channel resources that are allocated to the users of the first cell. | 05-30-2013 |
20130155987 | Method of Resource Allocation, System and Transmitter - A method of resource allocation, system and transmitter that the method includes scheduling a plurality of receivers by a transmitter according to requests for transmitting uplink data sent by the plurality of receivers, determining, respectively for each of the plurality of receivers, the uplink shared transmission channel resources, the used mapping relation of resources and the final cyclic shift n(DM_RS) for indicating an uplink feedback channel, according to the result of scheduling, a predefined mapping relation of resources, a spare mapping relation of resources and the n(DM_RS) and notifying the plurality of receivers by the transmitter of the determined uplink shared transmission channel resources of the plurality of receivers, the used mapping relation of resources and the final n(DM_RS). | 06-20-2013 |
20130163570 | BASE STATION ON THE BASIS OF ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SCHEME AND INTERFERENCE COORDINATION METHOD THEREOF - A base station on the basis of orthogonal frequency division multiplexing solution and an interference coordination method thereof are provided. The base station can include an interference estimation unit, which estimates the interference state of each physical resource block according to the feedback information from the user equipment, and in the condition that the interference of the physical resource block is greater than or equal to a first threshold and less than or equal to a second threshold which is greater than the first threshold, the interference of the physical resource block is estimated as medium interference state. The base station can also include an interference coordination request unit, which at least responses the medium interference state estimation to transmit the interference coordination request to one or a plurality of predetermined base stations, wherein interference coordination request includes the information for indicating the interference state of said physical resource block. | 06-27-2013 |
20130188583 | METHOD, TERMINAL DEVICE AND BASE STATION DEVICE FOR TRANSMITTING UPLINK RESPONSE SIGNALS - A method for transmitting uplink response signals is provided. In the method, at the terminal device side, the signal which represents whether the transmission block is received correctly is sent in Physical Uplink Control Channel (PUCCH) corresponding to the specific transmission block, so that a Base Station (BS) is informed which transmission blocks are received correctly. The base station device side determines that the transmission blocks excluding the transmission blocks which are determined to be received correctly are retransmitted according to the feedback response signals instead of retransmitting all the transmission blocks, thus improving the efficiency of data transmission, reducing the unnecessary retransmission, and benefiting full use of the communication resources. The related terminal device and base station device for implementing the method are also provided. | 07-25-2013 |
20130188750 | METHOD AND APPARATUS FOR DETERMINING PRECODING MATRIX, WIRELESS COMMUNICATION SYSTEM - A method and apparatus for determining a precoding matrix and a wireless communication system. In data retransmission, when the retransmission rank is less than an initial transmission rank, the transmitting end selects a matrix having a maximum similarity with an initial transmission precoding matrix in spatial direction according to the retransmission rank. In multiple data retransmissions, precoding matrixes for the retransmissions are different from each other and may have a minimum similarity in the spatial direction, but have a maximum similarity with the initial transmission precoding matrix in the spatial direction. Or, the similarity between each retransmission precoding matrix and the initial transmission precoding matrix in the spatial direction progressively decreases. When precoding matrixes (or identity matrixes) are required for the initial transmission, precoding matrixes having the minimum similarity with each other in the spatial direction are selected according to the retransmission rank, and then orderly used in multiple retransmissions. | 07-25-2013 |
20130195079 | CONTENTION-BASED UPLINK DATA TRANSMISSION METHOD, APPARATUS AND SYSTEM - A contention-based uplink data transmission method, apparatus and system are provided. The method may include that: a main control node in a communication system receives data transmitted via uplink contention transmission resources, and decodes the data, wherein the uplink contention transmission resources are uplink transmission resources which the main control node allocates to a plurality of terminal nodes in the communication system and via which the plurality of terminal nodes transmits data in a contention-based way; and the main control node sends reception status information to each terminal node transmitting the data via the uplink contention transmission resources, wherein the reception status information reflects whether the data transmitted from each terminal node has been decoded successfully. | 08-01-2013 |
20130208685 | METHOD FOR TRANSMITTING UPLINK RESPONSE SIGNALS, BASE STATION, MOBILE STATION AND COMMUNICATION SYSTEM - A method for transmitting uplink response signals, base station, mobile station and communication system, includes judging whether to use a downlink secondary component carrier to transmit data to a mobile station; if the judging result is positive, allocating resources according to the number of transmission blocks for transmitting the downlink data in the secondary component carrier, accordingly the mobile station is able to use the resources corresponding to a preconfigured primary component carrier and the resources allocated to the secondary component carrier to select uplink resources for transmitting response signals. | 08-15-2013 |
20130208686 | MICRO BASE STATION, MICRO BASE STATION INTERFERENCE COORDINATION METHOD, AND USER TERMINAL - Micro base station interference coordination includes: shifting, relative to subframes in a macro base station subframe configuration, subframes in the subframe configuration used in the micro base station by several subframes, wherein the number of the shifted subframes causes subframes in the micro base station subframe configuration, which are corresponding to a specific channel in the macro base station subframe configuration, not to transmit any signal un-allocatable by the micro base station after the shifting; emptying uplink subframes in the micro base station subframe configuration after the shifting, which are corresponding to downlink subframes containing a designated channel in the macro base station subframe configuration; and emptying the subframes in the micro base station subframe configuration after the shifting, which are corresponding to the specific channel in the macro base station subframe configuration, or causing portions of the subframes corresponding to the specific channel not to transmit any signal. | 08-15-2013 |
20130215853 | METHOD, USER EQUIPMENT, BASE STATION AND SYSTEM FOR DETERMINING COMPONENT CARRIER SCHEDULED IN CROSS-CARRIER SCHEDULING - A method, user equipment, base station and system for determining a component carrier scheduled in cross-carrier scheduling. The method for determining the scheduled component carrier includes: a user equipment (UE) detects scheduling information sent by a base station in a first dedicated searching space corresponding to a scheduling component carrier, the first dedicated searching space includes at least one candidate physical downlink control channel (PDCCH) ( | 08-22-2013 |
20130223282 | COEXISTENT WORKING MODE ESTABLISHMENT METHOD, USER EQUIPMENT, BASE STATION AND SYSTEM - The present invention discloses a method for solving the co-existence problem, a base station, user equipment, and system for performing the method. The method for solving the co-existence problem comprises: pre-configuring the information for co-existence working mode by a base station of a first communication system for a user equipment, receiving, by the base station of the first communication system from the user equipment in the first communication system, a mode establishing request for indicating the co-existence problem experienced by the user equipment and providing the assistance information for co-existence working mode in which the user equipment performs a first communication with the base station and performs a second communication with an apparatus in a second communication system which is different from the first communication system in a time-division manner. | 08-29-2013 |
20130242874 | METHOD FOR DETECTING INTERFERENCE USER, HOME BASE STATION AND USER EQUIPMENT - Detecting interference user and home base station including: pre-configuring the cell type information of a home base station as an open cell type, and broadcasting the cell type information by the home base station in the cell; determining whether user equipment is one belonging to the home base station by the home base station according to the related information transmitted by the user equipment via a random access procedure, wherein the related information includes user information or a random access preamble; and determining by the home base station that the user equipment is an interference user, if the user equipment is not one belonging to the home base station. | 09-19-2013 |
20130242913 | METHOD FOR TRANSMITTING UPLINK RESPONSE SIGNAL, TERMINAL EQUIPMENT AND BASE STATION - A method includes receiving downlink data transmitted by a base station via a primary and secondary component carrier in a predetermined order; detecting the received downlink data to obtain indication information on correctly receiving and wrongly receiving the downlink data, or no control information received, allocating corresponding uplink resources according to the primary and secondary component carrier where the detected downlink data is present; arranging the indication information obtained through detecting according to the order of transmitting the downlink data by the base station to obtain an indication information sequence; generating an uplink response signal and determining the uplink resources used to feed back the uplink response signal; transmitting the uplink response signal to the base station using the determined uplink resources, so the base station determines the downlink data retransmitted according to the uplink response signal fed back in the uplink resources, enabling the BS avoid unnecessary data retransmission. | 09-19-2013 |
20130265942 | Method for Obtaining Parameters, Base Station and Terminal Equipment - A method for obtaining parameters, base station and terminal equipment. The method includes: receiving by a terminal equipment a request message sent by a base station reporting related parameters of a random access procedure occurred in at least one carrier, the request message including carrier identification information; and sending the related parameters of a random access procedure occurred in the at least one carrier by the terminal equipment to the base station according to the request message, such that corresponding random access optimization is performed by a network side by using the related parameters. | 10-10-2013 |
20130279359 | METHOD FOR MEASURING CHANNEL STATE INFORMATION, UE AND BASE STATION - A method for measuring channel state information, a UE and base station are described. The method includes: receiving in a subframe of Pico cell, by the user equipment, the channel state information reference symbol or common reference symbol of the Pico cell, the subframe of Pico cell corresponding to an almost blank subframe in a measurement set; and measuring the channel state information of the Pico cell based on the channel state information reference symbol or common reference symbol of the Pico cell. In certain embodiments, the UE configured with coordinated multi-point mode may measure the CSI of the Macro cell and the Pico cell without muting or with decreased muting by using the measurement set, thereby overcoming or partially overcoming the problems brought by RE muting. | 10-24-2013 |
20130279432 | METHOD, DEVICE, TERMINAL, BASE STATION AND SYSTEM FOR CROSS-CARRIER SCHEDULING - A method, device, terminal, base station and system for cross-carrier scheduling are disclosed. Said method for cross-carrier scheduling includes: according to the number of component carriers involved in cross-carrier scheduling, adjusting the size of the control part, which is used for transmitting control information, in the frame corresponding to the component carrier; performing cross-carrier scheduling by utilizing the adjusted control part. According to the present invention, the situation that the number of component carriers involved in cross-carrier scheduling increases can be adapted to, and the block situation caused by no resources for transmitting the control information can be avoided. | 10-24-2013 |
20130294338 | METHOD AND DEVICE FOR INTERFERENCE COORDINATION AND COMMUNICATION SYSTEM, MOBILE STATION AND BASE STATION - A method and device for interference coordination in a communication system and the corresponding communication system, mobile station and base station (BS) are disclosed. In the method for interference coordination, a BS of a Pico Cell shifts a transmission frame backwards; a BS of a Macro Cell selects a sub-frame for transmitting a Channel State Information-Reference Signal (CSI-RS) from transmission frames of the Macro Cell itself, to enable the sub-frame of the BS of Macro Cell for transmitting CSI-RS to at least not overlap a sub-frame of the BS of the Macro Cell for transmitting a public channel and a sub-frame of the BS of Pico Cell partially; and the sub-frame of the BS of the Macro cell for transmitting the public channel at least does not overlap the sub-frame of the BS of Pico Cell for transmitting the public channel partially. | 11-07-2013 |
20130294383 | METHOD FOR SETTING SUBFRAMES, MACRO BASE STATION, MOBILE TERMINAL AND COMMUNICATION SYSTEM - A method for setting subframes, a macro base station, a mobile terminal and a communication system. The method for setting subframes in a macro base station comprising: receiving, from a micro base station, information that indicates main carrier and auxiliary carrier used by a mobile terminal at cell edge of the micro base station; and setting limited blank subframes on a carrier corresponding to the auxiliary carrier and used by the macro base station, according to the information; wherein the limited blank subframe is a subframe having a control area which can be used for transmitting control information, and a data area in which only a part of subcarriers can be used for transmitting data. | 11-07-2013 |
20130301589 | METHOD FOR REPORTING CHANNEL STATE INFORMATION, BASE STATION AND USER DEVICE - A method for reporting channel state information, base station and user equipment. The method includes: configuring a set of multiple measurement subsets by a base station; correspondingly storing the configured set of multiple measurement subsets and corresponding indication information, so as to establish mapping relation between the indication information and the set of measurement subsets; and notifying the mapping relation to UE, such that the UE, in needing to report channel state information, uses the obtained indication information and the mapping relation to determine measurement subsets related to reporting the channel state information, so as to report channel state information of the measurement subsets to the base station. | 11-14-2013 |
20130315087 | MOBILE TERMINAL, MICRO BASE STATION, MACRO BASE STATION, COMMUNICATION SYSTEM AND COMMUNICATION METHOD - A mobile terminal, a micro base station, a macro base station, a communication system and a communication method. The method includes receiving from a micro base station a designation of specific subframe and a designation of feedback mode; judging whether a current subframe is a specific subframe designated by the micro base station; and measuring and feeding back the channel condition of the current subframe in a joint transmission feedback mode when the current subframe is the specific subframe designated by the micro base station, and measuring and feeding back the channel condition of the current subframe in a feedback mode designated by the micro base station when the current subframe is not the specific subframe designated by the micro base station. | 11-28-2013 |
20130316721 | METHOD AND DEVICE FOR ALLOCATING UPLINK CHANNEL RESOURCE OF COOPERATIVE MULTI-POINT TRANSMISSION/RECEPTION - A method, device, system, User Equipment (UE), computer readable medium and programme product for allocating uplink channel resource of cooperative multi-point transmission/reception are disclosed. The method includes receiving involved information for allocating uplink control channel resource or uplink detection reference signal resource in at least one of other cells; according to the information for allocating the uplink control channel resource or the uplink detection reference signal resource in the involved main cell and at least one of other cells, determining the uplink channel resource which does not overlap the uplink control channel resource or the uplink channel resource allocated for an uplink communication in the main cell and at least one of other cells; and allocating the determined uplink channel resource for the uplink cooperative multi-point transmission/reception in the involved main cell and at least one of other cells. | 11-28-2013 |
20130322321 | DATA TRANSMISSION METHOD, WIRELESS COMMUNICATION SYSTEM, DESTINATION NODE AND RELAY NODE - A method, a wireless communication system, destination node and relay node includes receiving by a destination node at current time slot the data transmitted by at least one source node; demodulating and decoding the data transmitted by at least one source node to obtain a decoding result; receiving the decoding result transmitted by first relay nodes, the decoding result being obtained by the first relay nodes through demodulating and decoding the data transmitted by at least one source node and received at the current time slot; and notifying the source node to retransmit the data or transmit new data at the next time slot by the destination node according to the result of the demodulating and decoding of the data of the source node and the decoding result of the first relay nodes. | 12-05-2013 |
20130324133 | METHOD AND DEVICE FOR SELECTING A CELL IN HETEROGENEOUS NETWORK - The present invention discloses a method and a device for selecting a cell in a heterogeneous network. The method comprises estimating signal to noise ratios when a terminal is scheduled by a macro base station and a low power base station respectively by using the parameters of the macro base station and the low power base station measured by the terminal and related to signal reception quality (S | 12-05-2013 |
20140050174 | METHOD FOR CONFIGURING RESOURCE, METHOD FOR TRANSMITTING RESPONSE SIGNAL, BASE STATION AND USER EQUIPMENT - A method for configuring resource, method for transmitting response signal, base station and user equipment. The method for configuring resource comprises: configuring a PHICH resource in a data region of a second slot in the data resources scheduled to user equipment in a current subframe. The base station may transmit a response signal via the configured data resource. As a new PHICH resource is configured, the problem of inadequate PHICH resources existed at present is solved. | 02-20-2014 |
20140050175 | CELL IDENTIFIER ALLOCATION APPARATUS AND METHOD, BASE STATION, READABLE PROGRAM AND MEDIUM - A cell identifier allocation apparatus and method, a base station, a readable program and a medium including acquiring location information of a macro base station and location information of each of a plurality of remote transmitting apparatuses connected to the macro base station; determining relative distances between the plurality of remote transmitting apparatuses and relative distances between the macro base station and each of the plurality of remote transmitting apparatuses; classifying the macro base station and the plurality of remote transmitting apparatuses into a plurality of sets, according to the relative distances between the plurality of remote transmitting apparatuses and the relative distances between the macro base station and each of the plurality of remote transmitting apparatuses; allocating cell identifiers to the plurality of remote transmitting apparatuses; and generating information to be transmitted to corresponding remote transmitting apparatus according to the allocated cell identifier. | 02-20-2014 |
20140056267 | POWER COMPENSATING METHOD, USER EQUIPMENT AND BASE STATION - Embodiments of the present invention provide a power compensating method, user equipment and base station. The method comprises: receiving by the base station a pathloss value reported by the user equipment, or calculating the pathloss value according to a reference signal receiving power value reported by the user equipment; and compensating for power according to the pathloss value. With the embodiments of the present invention, power of signals may be compensated, and the power of the receiving side is made identical in uplink or downlink transmission, thereby multiplexing a transmission mode based on a codebook. | 02-27-2014 |
20140056269 | METHOD FOR CONFIGURING TRANSMISSION MODE, USER EQUIPMENT AND BASE STATION - Embodiments of the present invention provide method for configuring a transmission mode, user equipment and a base station. The method includes: receiving, by the user equipment, a higher layer signaling transmitted by the base station, the higher layer signaling containing information instructing the user equipment to configure a transmission mode; and configuring the transmission mode for the user equipment according to the information, the transmission mode being based on a CRS or a DM-RS. With the embodiments of the present invention, reusable bandwidth resources may be increased. | 02-27-2014 |
20140064394 | USER EQUIPMENT, BASE STATION AND METHOD FOR SELECTING REMOTE RADIO HEAD - The present invention relates to a User Equipment (UE), a base station and a method for selecting a Remote Radio Head (RRH). A UE, including: a storage unit configured to store a code book including a plurality of precoding matrixes which contain a precoding matrix having an element zero corresponding to an antenna; a precoding matrix selection unit configured to select the precoding matrix to be used according to the code book stored in the storage unit; and a report unit configured to report an index of the precoding matrix selected by the precoding matrix selection unit. In the preferred embodiments, elements of a same precoding matrix for antennas of same RRH are all zero or non-zero. | 03-06-2014 |
20140078997 | MULTIPLE USER MULTI-INPUT MULTI-OUTPUT TRANSMISSION METHOD, USER EQUIPMENT AND BASE STATION - Embodiments of the present invention provide an MU-MIMO transmission method, user equipment and base station. The method comprises: receiving by user equipment a signaling indication indicative of supporting a user to use a layer index transmitted by a base station, the signaling indication including a first layer index and a sum number of layers of the user equipment; and demodulating a received resource according to the first layer index and the sum number of layers of the user equipment; wherein in the resource, consecutive layer indices are adopted for data corresponding to the same user equipment. With the embodiments of the present invention, a mapping manner from a codeword to a layer may be further limited and optimized, and compromise of the feedback overhead, feedback accuracy and system signaling overhead may be better achieved. | 03-20-2014 |
20140079095 | CODE GENERATING APPARATUS, REFERENCE SIGNAL GENERATING APPARATUS, AND METHODS THEREOF - A code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator includes generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively. | 03-20-2014 |
20140119321 | SOUNDING REFERENCE SYMBOL SENDING METHOD, BASE STATION, AND USER EQUIPMENT - A method for transmitting sounding reference symbol, a base station and user equipment. The method comprises: configuring, by a base station, user equipment of a CoMP transmission mode, with parameter configuration information for transmitting SRS, the parameter configuration information including a frequency comb of the SRS and one or more pieces of the following information: cyclic shift, root sequence information, power control information, and transmission duration information, of the SRS; and transmitting the parameter configuration information to the user equipment by the base station, such that the user equipment transmits the SRS to the base station according to the parameter configuration information. The method is simple and flexible, efficiently uses limited SRS resources, and solves the problem in the prior art. | 05-01-2014 |
20140119322 | POWER COMPENSATION METHOD, BASE STATION, AND TERMINAL EQUIPMENT - A power compensation method, base station and user equipment. The method includes: transmitting, by a base station, when an expanded UE-specific PDCCH is amplitude phase keying modulated, a first ratio of the EPRE of the expanded UE-specific downlink control channel to the EPRE of a DM-RS in a first time slot occupied by the expanded UE-specific PDCCH, so that the terminal equipment performs power compensation in decoding the received data transmitted by the base station according to the first ratio, thereby ensuring correct demodulation of the received data by the terminal equipment. | 05-01-2014 |
20140119335 | METHOD FOR TRANSMITTING DOWNLINK CONTROL SIGNALING, METHOD FOR SEARCHING DOWNLINK CONTROL SIGNALING AND APPARATUS USED FOR THE SAME - Embodiments of the present invention provide a method for transmitting downlink control signaling, a method for searching downlink control signaling and an apparatus used for the same. The method for transmitting includes: transmitting downlink control information (DCI) in a common search space of a control region of a wireless communications system, the DCI indicating a search space of a UE-specific physical downlink control channel (PDCCH) located in a data region of the wireless communications system, the DCI further including a predetermined identifier for identifying the DCI. With the methods and apparatuses of the embodiments of the present invention, the search space of the PDCCH may be dynamically adjusted, thereby saving signaling overhead, and avoiding inconsistence of the search space of the base station and that of the UE. | 05-01-2014 |
20140133345 | METHOD AND APPARATUS FOR ESTABLISHING MAPPING RELATIONSHIP AND METHOD AND APPARATUS FOR FEEDING BACK CHANNEL QUALITY INFORMATION - A method and apparatus for establishing a mapping relationship and for feeding back channel quality information. The methods are applicable to terminal equipment configured with a coordinated multiple-point feedback mode, the method for establishing a mapping relationship includes: determining, by terminal equipment, the number of bits for denoting differential channel quality information and mapping relationship between each of bit values of the differential channel quality information and an offset reference value according to a CoMP transmission mode, so as to feed back the differential channel quality information by using the mapping relationship; wherein in the mapping relationship, a plurality of offset reference values to which the bit values in an order from small to large correspond are a plurality of incremental integers. | 05-15-2014 |
20140133440 | METHOD FOR SENDING AND RECEIVING DOWNLINK CONTROL INFORMATION, BASE STATION, AND MOBILE TERMINAL - The present invention relates to methods for sending and receiving downlink control information, a base station, and a mobile terminal. The method for sending downlink control information comprises: sending first downlink control information to a mobile terminal, the first downlink control information being a part of downlink control information and comprising resource allocation information; on resource specified by the resource allocation information, sending second downlink control information to the mobile terminal, the second downlink control information being the other part, different from the first downlink control information, of the downlink control information. | 05-15-2014 |
20140133441 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL SIGNALING - A method and apparatus for transmitting control signaling includes: transmitting indication information on a transmission location of control signaling by a base station to a mobile station configured as an open-loop MIMO transmission mode; transmitting the control signaling by the base station in a data region by using the open-loop MIMO transmission mode or a transmit diversity transmission mode if the location for transmitting the control signaling indicated by the information on a transmission location of control signaling is located at the data region. Whereby the number of mobile stations to be scheduled in a cell is increased and results in the scheduling information to be transmitted in a subframe increased, the control signaling of a mobile station configured as an open-loop MIMO transmission mode is placed in a data region for transmission, thereby increasing the number of UE scheduled, increasing the throughput of the system. | 05-15-2014 |
20140133448 | METHOD AND APPARATUS FOR UPLINK POWER CONTROL - A method and apparatus for uplink power control, including: transmitting, by user equipment, a sounding reference signal (SRS) to a network side according to a received triggering signal; receiving, by the user equipment, a path loss compensation value calculated based on the SRS and transmitted by the network side; estimating, by the user equipment, a path loss value according to a received cell-specific reference signal (CRS); and performing, by the user equipment, power compensation according to the path loss compensation and path loss values. On the basis of the original uplink power control performed according to the path loss estimated based on the downlink CRSs, the network side estimates the path loss compensation value of the UE by triggering the RRH UE to transmit aperiodic SRSs, and informs the UE in a semi-static manner, compensating for the inaccuracy of estimation of path loss and ensuring the efficiency of power control. | 05-15-2014 |
20140153432 | METHOD FOR REPORTING CHANNEL STATE INFORMATION, USER EQUIPMENT AND BASE STATION - Embodiments of the present invention provide a method for reporting channel state information, user equipment and base station. The method includes: receiving, by user equipment, an indication signaling transmitted by a base station, the indication signaling comprising identification information for triggering report of aperiodic channel state information; determining a measurement set of the report of the aperiodic channel state information according to the identification information; and reporting corresponding channel state information to the base station according to the measurement set. With the embodiments of the present invention, the needed aperiodic CSI may be quickly fed back, thereby achieving relatively flexible aperiodic report. | 06-05-2014 |
20140153524 | METHOD FOR RESOURCE ASSIGNMENT, BASE STATION AND TERMINAL EQUIPMENT - A method for resource assignment, base station and terminal equipment. The method includes: determining resource block group sizes or numbers of resource block subsets to which a stand-alone carrier and a carrier segment correspond; and assigning a resource to terminal equipment according to the resource block group sizes or the numbers of the resource block subsets. With this method, waste of RBs in the resource assignment type 0 may be avoided on the one hand, and on the other hand, a solution for resource assignment of the resource assignment type 1 is provided. | 06-05-2014 |
20140185699 | DATA TRANSMISSION METHOD AND SYSTEM, TRANSMITTER, AND RECEIVER - A data transmission method and system, transmitter and receiver. The method includes: mapping, by a transmitter, a plurality of data streams to a plurality of antennas of the transmitter by using precoding matrices and transmitting the plurality of data streams to a receiver via the plurality of antennas, wherein the transmitter selects the precoding matrices by taking a resource block as a granularity. With the embodiments of the present invention, the transmitter may transmit data streams to the receiver by using the precoding matrices W, and selects the precoding matrices W by taking a resource block (RB) as a granularity, so as to support DM-RS demodulation, and the receiver is not needed to perform PMI feedback, which is also applicable to a scenario where user feedback is not supported or PMI feedback is inaccurate, thereby achieving open-loop spatial multiplexing CoMP transmission. | 07-03-2014 |
20140206362 | METHOD AND APPARATUS FOR NOTIFYING STARTING SYMBOL OF PHYSICAL DOWNLINK SHARED CHANNEL - Embodiments of the present invention provide a method and apparatus for determining a starting symbol of a physical downlink shared channel; wherein, a Pico base station transmits information indicating a PDSCH starting symbol of the Pico base station to a Macro base station, the Macro base station transmits the information indicating a PDSCH starting symbol to a terminal, and the terminal determines the PDSCH starting symbol in accordance with the information indicating a PDSCH starting symbol. With the embodiments of the present invention, the terminal within a serving range of the Pico base station resulted from a high offset value will not incorrectly decode a PCFICH due to interference of the Macro base station, thereby making the terminal determine a demarcation symbol between a PDCCH and a PDSCH, further increasing the coverage of the Pico base station, and realizing load balancing of the Macro base station and Pico base station. | 07-24-2014 |
20140211712 | METHOD FOR TRANSMITTING DOWNLINK CONTROL INFORMATION, METHOD FOR BLIND DETECTION, BASE STATION AND TERMINAL EQUIPMENT - A method for transmitting Downlink Control Information (DCI), a method for blind detection, a base station and terminal equipment, including: a base station generates a DCI, such that a bit length of the DCI of terminal equipment configured with a carrier segment is equal to that of a DCI of the same format of terminal equipment not configured with a carrier segment; the base station transmits the DCI for the terminal equipment configured with the carrier segment in a common search region of a control channel. Or the base station transmits user-specific DCI in a user-specific search region for the terminal equipment configured with the carrier segment, while does not transmit corresponding user-specific DCI in the common search region of the control channel. The bit length of the common search region will not be increased, avoiding the increase of the number of blind detections at the terminal equipment. | 07-31-2014 |
20140211751 | METHOD FOR TRANSMITTING AN ENHANCED CONTROL SIGNALING, BASE STATION AND USER EQUIPMENT - A method for transmitting an enhanced control signaling, a base station and user equipment (UE) are applicable to a coordinated multipoint transmission mode. The method including: transmitting, by a pico base station, an enhanced physical control format indication signaling (E-PCFICH) to UE configured with the mode, the E-PCFICH including control signaling length, wherein the control signaling length is of a pico cell, or a maximum value of control signaling lengths of a macro cell and a pico cell. With the embodiments of the invention, the E-PCFICH including control signaling length is adopted in a pico cell, so that the UE can determine a starting position of the data area PDSCH of the pico cell according to the control signaling length, thereby solving the problem that the data area of the pico cell cannot be accurately determined under the CoMP mode, and ensuring that the UE correctly receives data. | 07-31-2014 |
20140247808 | METHOD AND APPARATUS FOR ENHANCING SYNCHRONIZATION IN A HETEROGENEOUS NETWORK - A method and apparatus for enhancing synchronization in a heterogeneous network, including transmitting an auxiliary synchronization signal by a base station in a pico cell, a transmission interval of the auxiliary synchronization signal being 10 ms or 5 ms, and the auxiliary synchronization signal being located in a 0 | 09-04-2014 |
20140293924 | MAPPING METHOD AND APPARATUS FOR A SEARCH SPACE OF A PHYSICAL DOWNLINK CONTROL CHANNEL - Embodiments of the present invention provide a mapping method and apparatus for a search space of a physical downlink control channel. The method includes: determining a search space allocated to the PDCCH according to a resource allocation scheme; and mapping each of candidates of the PDCCH to a logic time frequency resource of the search space according to a predefined interval. With the method and apparatus of the embodiments of the present invention, a frequency selective scheduling gain is obtained by mapping different candidates onto discrete time frequency resources, or a frequency diversity gain is obtained by mapping one candidate onto discrete time frequency resources, thereby improving the performance of the PDCCH. | 10-02-2014 |
20140301358 | Code Generating Apparatus, Reference Signal Generating Apparatus, and Methods Thereof - A code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator includes generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively. | 10-09-2014 |
20140301430 | Code Generating Apparatus, Reference Signal Generating Apparatus, and Methods Thereof - A code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator includes generating a non-correlation sequence for RS of a first resource block; spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; second spreading spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, by using a second group of Codes; the first and second frequency resources are adjacent frequency resources in frequency resource elements used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and mapping the spectrum-spread elements to the first and second frequency resources, respectively. | 10-09-2014 |
20140307680 | METHOD FOR LINKAGE RESOURCE ASSIGNMENT, UE, METHOD FOR MULTIPLEXING TRANSMISSION AND ENB - Embodiments of the present application provide a method for linkage resource assignment, UE, a method for multiplexing transmission and an eNB. The method for linkage resource assignment includes: acquiring, by UE, a lowest PRB index assigned to a PUSCH, cyclic shift information of an uplink DM-RS, and an initial position of a physical resource occupied by uplink grant signaling; and calculating group identification and sequence identification of a PHICH or an ePHICH, according to the lowest PRB index of the PUSCH, the cyclic shift information of the uplink DM-RS, and the initial position of physical resource occupied by uplink grant signaling, so as to determine whether the PHICH or the ePHICH is assigned to the UE. With the embodiments of the present application, a collision of a PHICH or an ePHICH may be reduced. | 10-16-2014 |
20140334333 | METHOD AND APPARATUS FOR DETERMINING DOWNLINK COORDINATED MULTIPOINT MEASUREMENT SET - A method and apparatus for determining a downlink coordinated multipoint measurement set. The method includes: receiving reference signal receiving power of a channel state information reference signal transmitted by each point in an RRM measurement set reported by UE; wherein the reference signal receiving power of each point in the RRM measurement set is measured by the UE based on more than one groups of preconfigured channel state information reference signal resources; and determining the downlink coordinated multipoint measurement set according to the reference signal receiving power reported by the UE. With the method, the UE needs not to measure RSRP of all the points for transmitting signals, thereby avoiding waste of resources, and solving problems in the prior art. | 11-13-2014 |
20150085808 | METHOD AND APPARATUS FOR PERFORMING CARRIER MANAGEMENT IN CARRIER AGGREGATION SYSTEM - A carrier aggregation system, includes transmitting a first signaling to configure one additional carrier to a user equipment (UE) at which the additional carriers are deactivated, to configure a timer to each additional carrier for the UE by which the carrier is deactivated after the corresponding timer expiry; transmitting a second signaling that carries an activation indication to the UE to activate one deactivated additional carrier in the configured carriers for the UE; activating at least one deactivated additional carrier, starting the timer, controlling the UE to start Physical Downlink Control Channel (PDCCH) monitoring and Physical Downlink Shared Channel (PDSCH) receiving on the activated additional carrier; transmitting PDCCH on the activated additional carrier for the UE, by which the corresponding timer being restarted; deactivating the activated carrier after the corresponding timer expiry, controlling the UE to stop the PDCCH monitoring and the PDSCH receiving on the deactivated additional carrier. | 03-26-2015 |