Patent application number | Description | Published |
20130022087 | METHOD, APPARATUS AND SYSTEM FOR CONFIGURING DEMODULATION REFERENCE SIGNAL - A method, an apparatus and a system for configuring a Demodulation Reference Signal (DMRS) are disclosed in the present invention. The method includes: receiving a DMRS indication index transmitted from a network side; determining at least one port used for the local transmission of the DMRS; acquiring the predetermined DMRS configuration parameters corresponding to the DMRS indication index and the at least one port, and configuring, according to the DMRS configuration parameters, the DMRS to be transmitted from the at least one port. Therefore, the terminal can implement the configuration of the DMRS without reloading the corresponding configuration information. Thus, the implementation complexity of the DMRS configuration flow is decreased, and the operation load of the terminal is also reduced. | 01-24-2013 |
20130039304 | METHOD FOR SENDING SOUNDING REFERENCE SIGNALS (SRS), TRIGGER METHOD AND DEVICE THEREOF - The present invention discloses a method for triggering the sending of Sounding Reference Signals (SRS), a method for sending the SRS and an device thereof. The method for triggering the sending of SRS includes that a base station sends a downlink transmission scheduling signal to the user equipment (UE), wherein the signal carries the indication information for instructing the UE to send the SRS. By adopting the present invention, one or a plurality of UEs can be triggered by one piece of physical downlink control channel (PDCCH) signal to send the SRS. | 02-14-2013 |
20130100896 | METHOD AND DEVICE FOR TRANSMITTING APERIODIC SOUNDING REFERENCE SIGNAL (SRS) - Embodiments of the present invention disclose a transmission method and device for aperiodic Sounding Reference Signal (SRS). By applying the technical solution of the embodiments in the present invention, a Base Station (BS) performing semi-static configuration of the aperiodic SRS on a mobile terminal through higher layer signaling to decrease signaling overhead. On the one hand, different sub-frames can be set with different or the same Cycle Shift (CS) and resource positions to increase the flexibility of system setting; On the other hand, aperiodic SRS may be transmitted in a plurality of sub-frames to reduce system delay and increase detection bandwidth. Moreover, the relatively flexible timing mode can be set in the terminal without bringing too many limits on the scheduling. | 04-25-2013 |
20130182618 | METHOD AND DEVICE FOR TRANSMITTING APERIODIC SRS IN TDD SYSTEM - Disclosed are a method and a device for transmitting an aperiodic SRS in a TDD system. In the technical solution of the present invention,a symbol is defined for the transmission of the aperiodic SRS in a special subframe in the TDD system. This avoids a scenario in which the transmission position of the aperiodic SRS is undefined when a plurality of symbols that can be used to transmit the aperiodic SRS are available in an uplink pilot time slot (UpPTS). The problem of transmitting aperiodic SRS in a TDD system special subframe is thus solved. The modification to corresponding instruction messages is not extensive, and there is no overuse of system resources. | 07-18-2013 |
20130201971 | TRANSMISSION METHOD AND APPARATUS FOR NON-PERIODIC SOUNDING REFERENCE SIGNAL(SRS) - The present invention discloses a transmission method and apparatus for non-periodic SRS. eNB configures time-domain configuration parameter of non-periodic SRS through higher layer signalling or downlink physical control channel signalling; terminal equipment transmits non-periodic SRS in indicated time-domain resource. The application of the technical solution of the embodiments of the present invention can reduce signalling consumption through high layer semi-static configuration of time-domain resource of non-periodic SRS. On one hand, flexible non-periodic SRS time-domain transmission is allowed for terminal equipment which can send non-periodic SRS in multiple subframes, which is featured by low sounding delay and great sounding bandwidth; on the other hand, flexible timing mode is also permitted for terminal equipment which brings little restriction to scheduling. | 08-08-2013 |
20130208670 | METHOD AND APPARATUS FOR PROCESSING UCI AND METHOD FOR TRANSMISSION THEREOF BASED ON MIMO SYSTEM - The present invention provides a method and apparatus for processing uplink control information (UCI) and a method for transmitting the UCI based on a multiple input multiple output system, which processing method comprises: repeating ACK/NACK source bits and/or rank indicator (RI) source bits in the uplink control information to form M groups, with each group corresponding to a code word (S | 08-15-2013 |
20140056272 | METHOD, DEVICE, AND SYSTEM FOR REPORTING CHANNEL QUALITY INDICATOR - Disclosed are a method, device, and system for reporting a channel quality indicator (CQI), applicable in solving the problem in coordinated multipoint transmission technology of the incapability of a network side to execute accurately resource distribution and scheduling due to the incapability of the network side to have accurate knowledge of the interference that a terminal is being subjected to. The method is: on the basis of measurement reference signals transmitted by each device in a measurement collection, the terminal feeding back to a network side device an initial CQI of each device in the measurement collection; on the basis of the initial CQI of each device fed back by the terminal, and of channel matrix reference information fed back by the terminal, the network side device calculating a target CQI of the terminal. This allows the network side to learn accurately the interference that the terminal is being subjected to, thus allowing for accurate execution of terminal scheduling, resource distribution, and MCS selection, for effectively improved system throughput in coordinated multipoint transmission, and for improved system performance. | 02-27-2014 |
20140066116 | METHOD OF AND APPARATUS FOR INTERFERENCE MEASUREMENT IN COORDINATED MULTIPOINT TRANSMISSION - The present application discloses a method of and apparatus for interference measurement in coordinated multipoint transmission so as to enable a user equipment to report corresponding channel state information accurately with respect to different interference sources. In the method according to an embodiment of the invention, the network side configures a user equipment with a plurality of sets of REs for interference measurement with respect to different interference sources and instructs the user equipment to select a set of REs for interference measurement adapted to an actual application environment to perform interference measurement, and as such in CoMP transmission, the user equipment can report channel state information with respect to the different interference sources accurately according to a network environment, so that the network side can gain timely knowledge of a change in network environment, thus accommodating a demand of CoMP transmission and further improving the performance of the system. | 03-06-2014 |
20150085763 | METHOD AND EQUIPMENT FOR INFORMATION TRANSMISSION BASED ON COORDINATED MULTIPLE POINT TRANSMISSION - Embodiments of the present invention disclose an information transmission method and equipment based on CoMP transmission. In the method, a user equipment determines a main transmission point. The user equipment determines RANK information of the main transmission point as well as channel state information corresponding to the RANK information. The user equipment sends the RANK information of the main transmission point and the channel state information to a network side equipment. In the embodiments of the present invention, the UE reports channel state information of limited RANK of every transmission point, channel state information of unlimited RANK of the main transmission point, and relative phase information between the transmission points, etc., to the network side equipment, thereby helping the network side to better implement flexible selection and dynamic switchover of transmission schemes. Moreover, it does not notably increase feedback expenses for the UE. | 03-26-2015 |
20150117346 | METHOD AND DEVICE FOR DETERMINING UPLINK CONTROL CHANNEL - The present invention relates to the communication technology and provides a method and device for determining uplink control channel, which includes the following steps: determining an offset parameter according to the received ePDCCH or the predefined setting, and determining a physical PUCCH for transmitting a feedback information corresponded to said ePDCCH by said offset parameter, and thus realizing the determination for the PUCCH for transmitting ACK/NACK feedback information corresponded to the enhance PDCCH. | 04-30-2015 |
20160029429 | D2D SWITCHOVER METHOD, SYSTEM, AND DEVICE - Embodiments of the present application relate to the technical field of wireless communication, in particular a D2D switchover method, system, and device, for solving the problem in prior art of the lack of mechanism for D2D switchover for D2D user devices under appropriate conditions so as to ensure the short-distance transmission quality in the situation where an LTE system has too high a load and interference is too strong. Embodiments of the present invention comprise: a network device determines, according to resource management information and/or channel status information whether a D2D user device needs to perform a D2D switchover; when the D2D user device is determined to need to perform a D2D switchover, the D2D user device is triggered to switch to a heterogeneous system and conduct end-to-end communication, or to conduct end-to-end communication via the network device, or to conduct in the current system end-to-end communication not controlled by the network device. The method in the embodiments of the present invention ensures that D2D devices can perform D2D switchover under appropriate conditions even when an LED system has too high a load and interference is too strong, thereby enhancing the end-to-end communication performance. | 01-28-2016 |
20160037530 | METHOD, NETWORK DEVICE, AND SYSTEM FOR TRANSMIT POWER CONTROL DURING DEVICE-TO-DEVICE COMMUNICATION - Disclosed are a method, network device, and system for transmit power control during D2D communication. The method comprises: a network device determines the maximum allowed transmit power of a first terminal on the basis of the maximum level of interference that a cellular network can handle and/or the maximum level of interference that the first terminal is allowed to cause to a receiving terminal, and sends said maximum allowed transmit power of the first terminal to the first terminal, said first terminal being the sending device of D2D communication; and the first terminal determines transmit power on the basis of said maximum allowed transmit power. By means of the present technical solutions, when determining transmit power, a D2D sending device takes into account the maximum interference a cellular network can handle and/or the maximum level of interference that may be caused to a receiving terminal, thereby reducing the interference caused to D2D communicating terminals or to terminals of other cells using the resources of a cellular network. | 02-04-2016 |
20160057709 | POWER CONTROL METHOD AND DEVICE FOR DEVICE TO DEVICE (D2D) TRANSMISSION - Disclosed are a power control method and device for D2D transmission. The method includes determining an upper limit value of interference power corresponding to a terminal. The upper limit value of the interference power is the maximum interference value which is allowed by a base station and generated by D2D transmission to cellular transmission. The base station sending the upper limit value of the interference power to the terminal the terminal determines the upper limit value of D2D transmission power by using the upper limit value of the interference power. The terminal determines the upper limit value of the D2D transmission power, and determines the D2D transmission power, the D2D transmission power of the terminal device can be controlled, transmitting power of the D2D transmission is controlled to make the interference generated by same to the cellular transmission to a controlled range, and the interference of a D2D signal to a cellular signal is controlled. | 02-25-2016 |
20160072712 | METHOD AND DEVICE FOR TRANSMITTING PILOT SIGNAL - Disclosed are a method and device for transmitting a pilot signal. The method therefor comprises: conducting OFDM modulation on a pilot signal; and sending the modulated pilot signal on the first and/or the last OFDM symbol of a subframe which transmits the pilot signal. In the technical solution provided in the embodiments of the present application, the pilot signal is transmitted on the first and/or the last OFDM symbol of the subframe, thereby not occupying an OFDM symbol for transmitting a data signal, so as to reduce the resource overhead of the pilot signal. | 03-10-2016 |
20160105878 | METHOD, SYSTEM AND DEVICE FOR DETERMINING TRANSMISSION LINK TYPE - The present invention relates to the technical field of wireless communications. Disclosed are a method, system and device for determining a transmission link type, to solve the receiving/transmitting duplexing problem in the prior art of a D2D link receiving terminal on a D2D link and an N2D link. The method comprises: a D2D receiving terminal reports to a network side device a first resource usage request on an N2D link, such that the network side device, after receiving the first resource usage request, determines the transmission link type of the D2D receiving terminal over a subframe n; and according to the type of the subframe n or the link type indication information received from the network side device, the D2D receiving terminal determines the transmission link type over the subframe n, the subframe n being a D2D subframe. An embodiment of the present invention improves system resource utilization and system performance. | 04-14-2016 |
Patent application number | Description | Published |
20130193480 | Epitaxy Technique for Reducing Threading Dislocations in Stressed Semiconductor Compounds - A solution for fabricating a semiconductor structure is provided. The semiconductor structure includes a plurality of semiconductor layers grown over a substrate using a set of epitaxial growth periods. During each epitaxial growth period, a first semiconductor layer having one of: a tensile stress or a compressive stress is grown followed by growth of a second semiconductor layer having the other of: the tensile stress or the compressive stress directly on the first semiconductor layer. One or more of a set of growth conditions, a thickness of one or both of the layers, and/or a lattice mismatch between the layers can be configured to create a target level of compressive and/or shear stress within a minimum percentage of the interface between the layers. | 08-01-2013 |
20130270519 | Non-Uniform Multiple Quantum Well Structure - A light emitting heterostructure including one or more fine structure regions is provided. The light emitting heterostructure can include a plurality of barriers alternating with a plurality of quantum wells. One or more of the barriers and/or quantum wells includes a fine structure region. The fine structure region includes a plurality of subscale features arranged in at least one of: a growth or a lateral direction. | 10-17-2013 |
20140110754 | Epitaxy Technique for Growing Semiconductor Compounds - A solution for fabricating a semiconductor structure is provided. The semiconductor structure includes a plurality of semiconductor layers grown over a substrate using a set of epitaxial growth periods. During each epitaxial growth period, a first semiconductor layer having one of: a tensile stress or a compressive stress is grown followed by growth of a second semiconductor layer having the other of: the tensile stress or the compressive stress directly on the first semiconductor layer. | 04-24-2014 |
20140134773 | Patterned Layer Design for Group III Nitride Layer Growth - A method of fabricating a device using a layer with a patterned surface for improving the growth of semiconductor layers, such as group III nitride-based semiconductor layers with a high concentration of aluminum, is provided. The patterned surface can include a substantially flat top surface and a plurality of stress reducing regions, such as openings. The substantially flat top surface can have a root mean square roughness less than approximately 0.5 nanometers, and the stress reducing regions can have a characteristic size between approximately 0.1 microns and approximately five microns and a depth of at least 0.2 microns. A layer of group-III nitride material can be grown on the first layer and have a thickness at least twice the characteristic size of the stress reducing regions. | 05-15-2014 |
20140326950 | Stress Relieving Semiconductor Layer - A semiconductor structure, such as a group III nitride-based semiconductor structure is provided. The semiconductor structure includes a cavity containing semiconductor layer. The cavity containing semiconductor layer can have a thickness greater than two monolayers and a multiple cavities. The cavities can have a characteristic size of at least one nanometer and a characteristic separation of at least five nanometers. | 11-06-2014 |
20150295133 | Semiconductor Heterostructure with Stress Management - A heterostructure for use in fabricating an optoelectronic device is provided. The heterostructure includes a layer, such as an n-type contact or cladding layer, that includes thin sub-layers inserted therein. The thin sub-layers can be spaced throughout the layer and separated by intervening sub-layers fabricated of the material for the layer. The thin sub-layers can have a distinct composition from the intervening sub-layers, which alters stresses present during growth of the heterostructure. | 10-15-2015 |
20150372193 | Patterned Layer Design for Group III Nitride Layer Growth - A device having a layer with a patterned surface for improving the growth of semiconductor layers, such as group III nitride-based semiconductor layers with a high concentration of aluminum, is provided. The patterned surface can include a substantially flat top surface and a plurality of stress reducing regions, such as openings. The substantially flat top surface can have a root mean square roughness less than approximately 0.5 nanometers, and the stress reducing regions can have a characteristic size between approximately 0.1 microns and approximately five microns and a depth of at least 0.2 microns. A layer of group-III nitride material can be grown on the first layer and have a thickness at least twice the characteristic size of the stress reducing regions. | 12-24-2015 |
20160035936 | Patterned Layer Design for Group III Nitride Layer Growth - A method of fabricating a device using a layer with a patterned surface for improving the growth of semiconductor layers, such as group III nitride-based semiconductor layers with a high concentration of aluminum, is provided. The patterned surface can include a substantially flat top surface and a plurality of stress reducing regions, such as openings. The substantially flat top surface can have a root mean square roughness less than approximately 0.5 nanometers, and the stress reducing regions can have a characteristic size between approximately 0.1 microns and approximately five microns and a depth of at least 0.2 microns. A layer of group-III nitride material can be grown on the first layer and have a thickness at least twice the characteristic size of the stress reducing regions. A device including one or more of these features also is provided. | 02-04-2016 |