Patent application number | Description | Published |
20110182200 | Method, Device and User Equipment for Transmitting Multi-Cell Scheduling Information - A method, device and user equipment (UE) for transmitting multi-cell scheduling information is provided. When at least two cells are serving the UE, the method for transmitting multi-cell scheduling information includes the following steps: determining a main cell of the UE from the at least two cells; transmitting, in the main cell, the scheduling information of the main cell and an auxiliary cell which are serving the UE. | 07-28-2011 |
20110212738 | METHOD, APPARATUS AND SYSTEM FOR ESTIMATING CHANNELS - A method, an apparatus and a system for estimating channels are disclosed. A method for estimating channels includes: receiving downlink signals inclusive of reference signals from two or more Access Points (APs), where the relative frequency shift between reference signals sent by different APs is zero; and performing channel estimation according to the reference signals. Another method for estimating channels includes: receiving downlink signals inclusive of reference signals from two or more APs, where for a first AP and a second AP among the two or more APs, a specific time-frequency lattice in the downlink signals sent by the first AP includes no data signal, and the specific time-frequency lattice corresponds to a time-frequency lattice utilized by the second AP to send a reference signal; and performing channel estimation according to the reference signals. The technical solution disclosed herein eliminates the interference between the reference signal and the data signal, enables the UE to estimate the channel value between the UE and the cooperative APs accurately, and improves the UE performance. | 09-01-2011 |
20110235603 | METHOD, NETWORK DEVICE AND SYSTEM FOR DETERMINING RESOURCE MAPPING IN COORDINATED MULTI-POINT TRANSMISSION - A method, a network device, and a system for determining resource mapping in CoMP transmission are disclosed. The method includes: the cooperative cells that perform CoMP transmission for a UE negotiate a mapping rule used by the cooperative cells when the status of the CoMP transmission of the UE changes, where the mapping rule includes the number of and position of OFDM symbols allocated to a PDCCH domain and/or a data channel domain; and the negotiated mapping rule is notified to the UE. In this embodiment, before the downlink signals are transmitted, the mapping rule used by each cooperative cell for CoMP transmission is negotiated between the cooperative cells, and therefore, the UE can accurately receive the signal sent by multiple cooperative cells and the performance of CoMP transmission in the system is improved. | 09-29-2011 |
20110312356 | METHOD, APPARATUS AND SYSTEM FOR ESTIMATING CHANNELS - A method, an apparatus and a system for estimating channels are disclosed. A method for estimating channels includes: receiving downlink signals inclusive of reference signals from two or more Access Points (APs), where the relative frequency shift between reference signals sent by different APs is zero; and performing channel estimation according to the reference signals. Another method for estimating channels includes: receiving downlink signals inclusive of reference signals from two or more APs, where for a first AP and a second AP among the two or more APs, a specific time-frequency lattice in the downlink signals sent by the first AP does not include data signal, and the specific time-frequency lattice corresponds to a time-frequency lattice utilized by the second AP to send a reference signal; and performing channel estimation according to the reference signals. The technical solution disclosed herein eliminates the interference between the reference signal and the data signal, enables the UE to estimate the channel value between the UE and the cooperative APs accurately, and improves the UE performance. | 12-22-2011 |
20120004007 | Method, Apparatus, and Network Device for Power Control - A method for power control includes: if a downlink serving Access Point (AP) of a User Equipment (UE) is different from an uplink serving AP of the UE, sending, by a base station, downlink signaling to the UE so that the UE adjusts uplink transmitting power according to the downlink signaling. In addition, the present invention discloses an apparatus and a network device for power control. | 01-05-2012 |
20120039182 | METHOD FOR PROCESSING UPLINK SIGNAL, BASE STATION, AND USER EQUIPMENT - A method for processing an uplink signal, a BS, and a UE are provided. The method includes: receiving an uplink signal that is generated according to CP configuration information and is sent by a UE, where the CP configuration information is used to identify a mapping relationship between a TTI and a CP type that is used by the uplink signal; and determining, according to the CP configuration information, a CP type corresponding to a TTI of receiving the uplink signal, and processing the uplink signal according to the determined CP type. The UE can use different CP types in the case of different TTIs. Therefore, the technical solutions provided in embodiments of the present invention provide support for solving the uplink delay without introducing too large overhead. | 02-16-2012 |
20120135741 | METHOD, DEVICE AND USER EQUIPMENT FOR CONFIGURING REFERENCE SIGNAL - Embodiments of the present invention relate to a method, device and user equipment for configuring a reference signal (RS). The method includes: acquiring group number information of a RS allocated for a UE respectively by each cell; acquiring, according to the group number information, group offset information of a RS of a UEm served by at least two cells at the same time in the UE; and sending the group offset information to the UEm, so that the UEm acquires new group number information according to the allocated group number information of the RS and the group offset information, and sends a RS according to the new group number information. In the method, a RS is sent according to new group number information, thereby avoiding interference generated by a UE in each cell on a scheduled UEm when an eNB schedules the UEm. | 05-31-2012 |
20120208577 | METHOD, APPARATUS AND SYSTEM FOR ESTIMATING CHANNELS - A method, an apparatus and a system for estimating channels are disclosed. A method for estimating channels includes: receiving, by a User Equipment (UE), downlink signals sent by two or more Access Points (APs), wherein no common reference signal is comprised in any data channel symbol domain except a preset symbol domain in the downlink signals; and performing, by the UE, channel estimation according to the downlink signals. The technical solution disclosed herein eliminates the interference between the reference signal and the data signal, enables the UE to estimate the channel value between the UE and the cooperative APs accurately, and improves the UE performance. | 08-16-2012 |
20120307868 | METHOD, BASE STATION, AND TERMINAL FOR GENERATING REFERENCE SIGNAL - The present invention relates to a method for generating a reference signal, including: obtaining first control information, where the first control information indicates or includes cyclic shift related information which is used by a terminal belonging to a serving cell to send a reference signal; and sending the first control information to the terminal belonging to the serving cell, so that the terminal belonging to the serving cell generates the reference signal according to the cyclic shift related information which is indicated or included by the first control information and used by the terminal to send the reference signal, where a variation rule of a cyclic shift which the terminal belonging to the serving cell uses to generate the reference signal is the same as that of a cyclic shift which a terminal belonging to a coordinated cell uses to generate the reference signal. | 12-06-2012 |
20130114547 | METHOD AND DEVICE FOR GENERATING DEMODULATION REFERENCE SIGNAL SEQUENCES - The embodiments of the present invention disclose resource configuration methods and devices of a demodulation reference signal. The method includes determining the first number of a first transmission layers of a user equipment (UE) for transmitting uplink data; selecting a combination of a Cyclic Shift (CS) resource and an Orthogonal Cover Code (OCC) sequence from one combination item according to the first number of the first transmission layers for each of the first transmission layers; wherein the one combination item is among a plurality of predetermined combination items, each of the plurality of predetermined combination items comprises the second number of predetermined CS resources and OCC sequences respectively corresponding to the maximum number of transmission layers supportable by the communication system. The solutions of the present invention can simplify the complexity of a protocol describing the DMRS resource configurations, and is helpful for reducing inter-codeword DMRS interferences. | 05-09-2013 |
20130279468 | METHOD AND APPARATUS FOR CHANNEL ESTIMATION - To facilitate sending a reference signal in a wireless communication environment, a transmitter sends a reference signal in a first time-frequency resource to a user equipment (UE); the transmitter sends data information in a first portion of a second time-frequency resource different from the first time-frequency resource to the UE; and the transmitter excludes data information from being sent in a second portion of the second time-frequency resource. The second portion of the second time-frequency resource is designated for use by another transmitter for sending another reference signal to the UE. | 10-24-2013 |
20140087782 | PATH LOSS COMPENSATION METHOD, BASE STATION AND USER EQUIPMENT - Embodiments of the present invention disclose a path loss compensation method, a base station, and a user equipment to implement calculation for path loss compensation. The method in an embodiment of the present invention includes: obtaining, by a base station, power parameters of a macro site and an RRH in a cell where a UE is located; calculating, by the base station, a path loss adjustment factor for the UE according to the power parameters, where the path loss adjustment factor is an adjustment parameter used by the base station to compensate for an uplink transmit power of the UE; and sending, by the base station, the path loss adjustment factor to the UE, so that the UE can calculate the uplink transmit power according to the path loss adjustment factor. | 03-27-2014 |
20140098770 | METHOD, APPARATUS, AND SYSTEM FOR COMP RETRANSMISSION - The present invention provides a method, an apparatus, and a system for CoMP retransmission. The method includes: sending downlink control signaling to a user equipment UE, so that the UE receives, according to the downlink control signaling, an initially transmitted signal sent by a serving transmission point and a cooperative transmission point by joint processing mode; receiving first NAK information corresponding to the initially transmitted signal and returned by the UE, and sending a retransmitted signal corresponding to the initially transmitted signal to the UE according to the first NAK information, where the initially transmitted signal also corresponds to second NAK information sent by the UE to the cooperative transmission point, where the second NAK information is used to instruct the cooperative transmission point to, when the serving transmission point sends the retransmitted signal to the UE, reduce interference to the UE with scheduling. | 04-10-2014 |
20140148186 | METHOD FOR DETERMINING TIMING ADVANCE TA, AND METHOD AND DEVICE FOR TRANSMITTING INFORMATION - The present invention provide a method for determining a timing advance TA, and a method and a device for transmitting information, including: receiving downlink signal characteristic information of each transceiver node in a first transceiver node set in a cell accessed by a terminal, where the first transceiver node set includes one or more transceiver nodes; detecting, according to the downlink signal characteristic information of each transceiver node in the first transceiver node set, time at which a downlink signal transmitted by each transceiver node in the first transceiver node set arrives at the terminal; and determining, according to the time at which the downlink signal transmitted by each transceiver node in the first transceiver node set arrives at the terminal, a timing advance TA for transmitting an uplink signal to each transceiver node in the first transceiver node set. | 05-29-2014 |
20140192744 | METHOD AND APPARATUS FOR COORDINATED MULTI-NODE TRANSMISSION - Embodiments of the present invention provide a method and an apparatus for coordinated multi-node transmission The method includes: acquiring, by a user equipment, channel state indicator information of each coordinating node; feeding back, by the user equipment, all information or a part of information in the acquired channel state indicator information to a base station, so that each coordinating node performs, according to the channel state indicator information that has been fed back, scheduling on the user equipment and/or one or more other user equipments served by each coordinating node; and if the user equipment is scheduled, receiving, by the user equipment, scheduling result notification information sent by the base station, and receiving, by the user equipment according to the scheduling result notification information, data transmitted by a base station that corresponds to a coordinating node serving the user equipment. The present invention is applicable to a radio communications system. | 07-10-2014 |
20140206342 | INFORMATION TRANSMISSION METHOD, USER EQUIPMENT AND BASE STATION - The present invention discloses an information transmission method, a user equipment and a base station. The method includes: receiving indication signaling that is sent by a base station and includes a sequence group offset value, where the sequence group offset value is used to adjust a sequence group number of a sequence group used by a user equipment for sending a sequence modulated signal; and determining the sequence group number according to the sequence group offset value. The method further includes: determining a sequence group offset value, where the sequence group offset value is used to adjust a sequence group number of a sequence group used by a user equipment for sending a sequence modulated signal; and sending indication signaling to the user equipment, where the indication signaling includes the sequence group offset value. | 07-24-2014 |
20140211723 | INTERFERENCE MEASUREMENT INDICATION METHOD, INTERFERENCE MEASUREMENT METHOD, RELATED DEVICE, AND COMMUNICATION SYSTEM - Embodiments of the present invention disclose an interference measurement indication method, an interference measurement method, a related device, and a communication system. The interference measurement indication method includes: transmitting, by a base station, at least one piece of first-type channel state information reference signal CSI-RS configuration signaling to a user equipment UE, where the at least one piece of first-type CSI-RS configuration signaling indicates a first resource set used for CSI-RS transmission; and transmitting, by the base station, at least one piece of second-type CSI-RS configuration signaling to the UE, where a second resource set used for CSI-RS transmission, which is indicated by the at least one piece of second-type CSI-RS configuration signaling, is a subset of the first resource set. Technical solutions provided by the embodiments of the present invention help improve the flexibility of interference measurement of the UE. | 07-31-2014 |
20140256374 | Method, Apparatus, and Network Device for Power Control - In a method for power control, a user equipment (UE) receives a path loss measurement indicator and at least one parameter sent by a base station and measures a path loss between the UE and at least one uplink serving access point of the UE according to the path loss measurement indicator. An uplink transmitting power adjustment value is calculated according to the measured path loss and the at least one parameter received from the base station. The UE adjusts uplink transmitting power according to the uplink transmitting power adjustment value. | 09-11-2014 |
20140314018 | PILOT RESOURCE ALLOCATION METHOD AND DEVICE - Various embodiments of the present invention provide a pilot resource allocation method, where the method includes: determining, according to an aggregation level and multiplexing information of an enhanced control channel element E-CCE in a resource block pair, the number of resource elements REs that are allocated to and occupied by a demodulation pilot signal DMRS in the resource block pair. Various embodiments of the present invention further provide a corresponding user equipment. By implementing the method and device, the efficiency of time-frequency resource utilization can be improved. | 10-23-2014 |