Abstract: The present disclosure provides a signal transmission method and a signal transmission apparatus. The signal transmission method includes steps of receiving, by a UE, a signal on a carrier or cell which uses a predetermined spectrum resource, and determining whether or not the received signal belongs to a serving carrier or serving cell of the UE; and in the case that the received signal belongs to the serving carrier or serving cell of the UE, performing measurement and/or data transmission by the UE in accordance with the received signal and/or a subsequently-received signal.

Abstract: A first type of UCI that needs to be transmitted in a current subframe is generated by a terminal device; a second type of UCI that needs to be transmitted in the current subframe is generated on the basis of a threshold number of bits simultaneously transmitted with the UCI in the current subframe and of the number of bits transmitting the first type of UCI; the first type of UCI and the second type of UCI generated are transmitted on corresponding channel resources in the current subframe.

Abstract: Disclosed are a carrier aggregation feedback method, device and system, relating to communication technologies. The number M of subframes requiring ACK/NACK feedback in a current uplink subframe is determined according to a TDD uplink/downlink configuration that corresponds to each carrier and is used for determining a timing relationship based on which a UE reports ACK/NACK feedback information of the carrier, and then ACK/NACK feedback information transmitted by a terminal device in the current uplink subframe and a candidate channel resource used for channel selection are determined according to the value of M, so as to transmit the ACK/NACK feedback information in the candidate channel resource by using PUCCH format 1b in combination with channel selection.

Abstract: Disclosed are a data transmission method and device. The method comprises: receiving a PDCCH, wherein the PDCCH comprises an indication domain which can at least indicate different HARQ processes the number of which is a sum of maximum HARQ process numbers of a plurality of carriers, and initial transmission and retransmission of data in the same HARQ process use different carriers; and receiving data scheduled by the PDCCH according to the PDCCH. By means of the present application, transmission carriers during initial transmission and retransmission of data in the same process can be adjusted flexibly, so that, when interferences to some carrier(s) are serious, data transmission in the process is adjusted to a carrier or carriers to which interference conditions are not serious, so as to improve system transmission efficiency.

Abstract: Disclosed is an uplink power control method, which is used for realizing power control over uplink channels with different uplink transmission times so as to ensure that the total transmit power of terminal equipment in a sub-frame does not exceed maximum transmit power and that a system can work normally.

Abstract: The present invention relates to the technical field of wireless communication, particularly relates to a method, system and apparatus for sending and receiving feedback information, to be used for transmitting the feedback information after the aggregation of carriers with different time division duplex (TDD) uplink and downlink configurations. The method of an embodiment of the present invention comprises: determining a dedicated feedback timing relationship by using a user equipment (UE) aggregating carriers with different TDD uplink/downlink configurations; the UE transmitting the feedback information corresponding to the downlink data on the primary carrier according to the determined dedicated feedback timing relationship.

Abstract: Disclosed are a method and an apparatus for controlling uplink power, so as to solve a problem that in a scenario of double connections, when a terminal performs uplink transmission, there is no corresponding solution to control uplink power. The method in the present invention comprises: a terminal determining uplink information to be sent on an uplink carrier, the uplink information comprising uplink information corresponding to a first base station and uplink information corresponding to a second base station; and the terminal determining, according to at least one group of power control parameters pre-configured for calculating transmit power of an uplink channel bearing the uplink information, transmit power of at least one uplink channel bearing the uplink information, and sending corresponding uplink information on the at least one uplink channel of the uplink carrier according to the transmit power of the at least one uplink channel.

Abstract: The present application relates to the field of communications, and disclosed are a DCI transmission method and device under cross-band carrier aggregation. The method is: for LTE-A UE which aggregates carriers having different TDD uplink/downlink configurations, according to a pre-arranged rule or high-layer signaling configuration information, determining whether a DAI and a UL index are contained in a DCI format which is used by a PDCCH for scheduling a PUSCH, and determining a CSS and a USS respectively and separately. Accordingly, it can be ensured that the size of a DCI which is transmitted in a CSS does not change, thus ensuring the normal transmission of common cell information, and at the same time, in a USS, according to the actual needs, a specific bit field in the DCI can be determined rationally, thus supporting the UL multi-frame scheduling and/or the resource overhead control of an ACK/NACK over a PUSCH.

Abstract: Disclosed are a feedback information transmitting method and device, used for addressing a lack of a plan for solving the problem of transmitting uplink control information corresponding to downlink carrier scheduled by a plurality of base stations in a dual connectivity scenario. A terminal of the present invention receives over a first carrier the data scheduled by a first base station, and receives over a second carrier the data scheduled by a second base station; generating first uplink control information for the first carrier, and/or generating second uplink control information for the second carrier; transmitting the generated uplink control information via PUCCH and/or PUSCH over an uplink carrier, the uplink control information comprising at least one of the first uplink control information and the second uplink control information.

Abstract: Disclosed are an uplink control information transmission method and device for addressing a lack of a solution that a terminal provides feedback of downlink carriers scheduled by different base stations in a dual-connectivity scenario. The method in an embodiment of the present application comprises: a terminal receives data over a first carrier and a second carrier, the data over the first carrier being scheduled by a first base station and the data over the second carrier being scheduled by a second base station; the terminal generates first uplink control information for the first carrier, and/or the terminal generates second uplink control information for the second carrier; the terminal transmits the generated uplink control information over one uplink carrier according to a TA value and a reference carrier, the uplink control information comprising at least one of the first uplink control information and the second uplink control information.

Abstract: 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 (S302), wherein M is the total number of code words; carrying out channel encoding on the ACK/NACK source bits and/or RI source bits of each code word to obtain QACK*Li output bits (S304), wherein QACK is the channel encoding output bits corresponding to each layer in a certain code word, L is the total number of layers, and the layer number corresponding to the i-th code word is Li; and multiplexing and interleaving the output bits and the data bits of the corresponding code word (S306).

Abstract: Disclosed are a method for implementing HARQ feedback, and a method and device for allocating an uplink subframe. The method is: determining a TDD uplink/downlink reference configuration used for FDD PDSCH HARQ feedback, and allocating, according to the number of uplink subframes indicated by the TDD uplink/downlink reference configuration in a radio frame, an FDD downlink subframe corresponding to ACK/NACK information borne by an uplink subframe indicated by the TDD uplink/downlink reference configuration to the uplink subframe, so that numbers of FDD downlink subframes corresponding to ACK/NACK information borne by the uplink subframes indicated by the TDD uplink/downlink reference configuration are approximately equal. In this way, ACK/NACK information corresponding to downlink data can be timely and accurately fed back, so as to perform accurate data retransmission, thereby effectively ensuring the system performance.

Abstract: The present application relates to the field of communications, and disclosed are a DCI transmission method and device under cross-band carrier aggregation. The method is: for LTE-A UE which aggregates carriers having different TDD uplink/downlink configurations, according to a pre-arranged rule or high-layer signaling configuration information, determining whether a DAI and a UL index are contained in a DCI format which is used by a PDCCH for scheduling a PUSCH, and determining a CSS and a USS respectively and separately. Accordingly, it can be ensured that the size of a DCI which is transmitted in a CSS does not change, thus ensuring the normal transmission of common cell information, and at the same time, in a USS, according to the actual needs, a specific bit field in the DCI can be determined rationally, thus supporting the UL multi-frame scheduling and/or the resource overhead control of an ACK/NACK over a PUSCH.

Abstract: A method and an apparatus for ACK/NACK transmission. When a terminal device only receives a semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) and a physical downlink control channel (PDCCH) in which a downlink assignment index (DAI) value is equal to 1 in a feedback window, the terminal device transmits ACK/NACK feedback information corresponding to the SPS PDSCH and ACK/NACK feedback information corresponding to the PDCCH on PUCCH format 1a/1b resource using PUCCH format 1b with channel selection or ACK/NACK bundling.

Abstract: Disclosed are a method and apparatus for transmitting a power control command. The method for a UE side thereof comprises: determining a TPC-RNTI corresponding to each carrier group and a tpc-index corresponding to each carrier group; detecting a PDCCH adopting a DCI format 3/3A and scrambled by using the TPC-RNTI corresponding to each carrier group in a common search space of a PCC; and according to the tpc-index corresponding to each carrier group, determining the position of an uplink power control command corresponding to the carrier group in the detected PDCCH scrambled by using the TPC-RNTI corresponding to the carrier group, and acquiring the uplink power control command corresponding to the carrier group from a corresponding position. Thus, a user equipment transmits a corresponding uplink power control command while supporting that uplink channels are transmitted over different uplink carriers corresponding to different carrier groups, thereby guaranteeing the normal and stable operation of a system.

Abstract: Disclosed are a physical uplink control channel (PUCCH) power control method and device, which relate to the technique of communications.

Abstract: The present application relates to the field of wireless communications. Disclosed in an embodiment of the present application are a method and device for reporting power headroom (PH) under carrier aggregation, for solving the problem of how to report PH when a terminal supports the transmission of a physical uplink control channel (PUCCH) on different uplink carriers corresponding to different carrier groups. In the present application, a terminal generates a Type 1 PH and a Type 2 PH for each of multiple PUCCH-transmitting uplink carriers requiring PH reporting, generates a Type 1 PH for each non-PUCCH-transmitting uplink carrier requiring PH reporting, and reports each generated Type 1 PH and Type 2 PH to a network side in the current uplink subframe. The present application solves the above problem.

Abstract: 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 (S302), wherein M is the total number of code words; carrying out channel encoding on the ACK/NACK source bits and/or RI source bits of each code word to obtain QACK*Li output bits (S304), wherein QACK is the channel encoding output bits corresponding to each layer in a certain code word, L is the total number of layers, and the layer number corresponding to the i-th code word is Li; and multiplexing and interleaving the output bits and the data bits of the corresponding code word (S306).

Abstract: Disclosed are a method and a device for sending and receiving acknowledgement feedback information, which relate to the field of wireless communications, and are applicable to solving the problem of transmitting acknowledgement feedback information of downlink data in the case of aggregation of a time division duplex (TDD) carrier and a frequency division duplex (FDD) carrier. In this solution, a terminal receives configuration signaling sent by a network side, where the configuration signaling instructs to divide M downlink carriers for carrier aggregation into information about N downlink carrier groups, and to configure one uplink carrier for each downlink carrier group; the uplink carrier used for sending acknowledgement feedback information corresponding to downlink data is determined according to the configuration signaling, and the acknowledgement feedback information corresponding to the downlink data is sent to the network side according to a determination result after the downlink data is received.

Abstract: The present invention discloses a method and apparatus for receiving signals, which comprises the followings: receive signals on at least one receiving branch, which comprises at least two reception units, including one data reception unit and one pilot reception unit at least. Said signal refers to a codeword in a transmission codebook; calculate metric value of each codeword in said transmission codebook according to said received signal; obtain the codeword with maximal metric value among all said codewords and the metric value corresponding to this codeword; if this value exceeds threshold value, Determining the codeword corresponding to said maximal metric value; if this value is less than the threshold value, Determining discontinuously-sent DTX. In the present invention, perform joint demodulation of data symbol and pilot symbol to make the demodulation results more reliable; meanwhile; judge whether it is discontinuous transmission based on joint demodulation of data symbol and pilot symbol.