Abstract: Embodiments of the present disclosure provide a signal retransmission apparatus and method and a communication system. The method includes: a first UE determines a resource for retransmitting a signal according to a resource for initially transmitting the signal and a frequency hopping pattern; and retransmits the signal to a second UE according to the determined resource. With the embodiments of the present disclosure, interference between UEs may be randomized as possible, and complexity of blind detection by receiver end UE may be lowered as possible.

Abstract: A method for feeding back channel state information, applicable to a coordinated multi-point (CoMP) transmission system, the method includes; arranging more than one piece of channel state information in a source bit domain by way of concatenating the more than one piece of channel state information in a bit domain; performing corresponding processing and mapping to a resource of the arranged more than one piece of channel state information; and transmitting the processed and mapped more than one piece of channel state information to the network side of the CoMP transmission system, wherein the more than one piece of channel state information are arranged in the source bit domain in an order of the configured channel state information.

Abstract: A method for feeding back channel state information, UE and system. The method is applicable to a CoMP transmission system and includes: feeding back channel state information to a network side by way of concatenating more than one pieces of channel state indication information in a bit domain. In this way, a method for feeding back multiple pieces of CSI in the CoMP transmission may be provided. Furthermore, RI information and CQI/PMI information in the CSI may be respectively encoded and mapped, so as to ensure reliable transmission of the RI information and CQI/PMI information.

Abstract: Embodiments of the present invention provide a method for determining uplink control channel resources; wherein the method includes: receiving, by user equipment (UE), a specific parameter configured for a mapping manner of its enhanced physical downlink control channel (E-PDCCH) by an eNB; and determining its uplink control channel (PUCCH) resources by the UE according to a specific parameter corresponding to the mapping manner of its E-PDCCH and a PUCCH calculation formula. With the embodiments of the present invention, collision of PUCCH resources of different UE is lowered, and/or spectral efficiencies of the PUCCHs are improved.

Abstract: User equipment (UE), includes: a receiver configured to receive a specific parameter configured for a mapping manner of an enhanced physical downlink control channel (E-PDCCH) of the UE by an eNB, wherein the specific parameter configured for the mapping manner of the E-PDCCH corresponds to a localized mapping or a distributed mapping; and a processing circuit coupled to a memory configured to determine uplink control channel (PUCCH) resources of the UE according to the specific parameter corresponding to the localized or distributed mapping of the E-PDCCH of the UE and a PUCCH calculation formula.

Abstract: Embodiments of the present disclosure provide a signal retransmission apparatus and method and a communication system. The method includes: a first UE determines a resource for retransmitting a signal according to a resource for initially transmitting the signal and a frequency hopping pattern; and retransmits the signal to a second UE according to the determined resource. With the embodiments of the present disclosure, interference between UEs may be randomized as possible, and complexity of blind detection by receiver end UE may be lowered as possible.

Abstract: User equipment (UE), includes: a receiver configured to receive a specific parameter configured for a mapping manner of an enhanced physical downlink control channel (E-PDCCH) of the UE by an eNB, wherein the specific parameter configured for the mapping manner of the E-PDCCH corresponds to a localized mapping or a distributed mapping; and a processing circuit coupled to a memory configured to determine uplink control channel (PUCCH) resources of the UE according to the specific parameter corresponding to the localized or distributed mapping of the E-PDCCH of the UE and a PUCCH calculation formula.

Abstract: A method, an apparatus and a communication system for configuring channel measurement, in order to efficiently ensure channel conditions of a cell transmitting a PUCCH to which a secondary eNB corresponds in a small cell system, includes: configuring a terminal with a measurement object and reporting configuration; wherein the measurement object indicates a frequency needing to be measured, the reporting configuration indicates a measurement report condition, the measurement report condition being that a measurement result of a neighboring cell is better than a sum of a measurement result of a cell transmitting a PUCCH to which a secondary eNB corresponds (SPCell) and a predefined order value, or a measurement result of a neighboring cell is better than a first threshold value and a measurement result of an SPCell is worse than a second threshold value, and the neighboring cell being a cell at the frequency indicated in the measurement object.

Abstract: Embodiments of the present invention provide a downlink precoding method and data interacting method for coordinated multi-point transmission system and apparatus. The downlink precoding method includes: acquiring a precoding matrix indicator by a cooperating point and determining the precoding matrix of the cooperating point according to the precoding matrix indicator, the number of columns of the precoding matrix of the cooperating point being less than that of columns of the precoding matrix of a serving point; and performing, by the cooperating point, downlink precoding to the data to be transmitted according to the determined precoding matrix of the cooperating point. With the methods and apparatuses of the embodiments of the present invention, as the cooperating points participate only in the transmission of data of part of layers in the coordinated scenarios, the complexity of calculation and the feedback overhead are lowered in the UE end.

Abstract: Embodiments of the present invention provide a downlink precoding method and data interacting method for coordinated multi-point transmission system and apparatus. The downlink precoding method includes: acquiring a precoding matrix indicator by a cooperating point and determining the precoding matrix of the cooperating point according to the precoding matrix indicator, the number of columns of the precoding matrix of the cooperating point being less than that of columns of the precoding matrix of a serving point; and performing, by the cooperating point, downlink precoding to the data to be transmitted according to the determined precoding matrix of the cooperating point. With the methods and apparatuses of the embodiments of the present invention, as the cooperating points participate only in the transmission of data of part of layers in the coordinated scenarios, the complexity of calculation and the feedback overhead are lowered in the UE end.

Abstract: A method for feeding back channel state information, applicable to a coordinated multi-point (CoMP) transmission system, the method includes; arranging more than one piece of channel state information in a source bit domain by way of concatenating the more than one piece of channel state information in a bit domain; performing corresponding processing and mapping to a resource of the arranged more than one piece of channel state information; and transmitting the processed and mapped more than one piece of channel state information to the network side of the CoMP transmission system, wherein the more than one piece of channel state information are arranged in the source bit domain in an order of the configured channel state information.

Abstract: An information transmitting method, information detecting method and apparatuses thereof and a communication system. The information transmitting method includes: transmitting, when control information is repeatedly transmitted over multiple subframes, a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH), by using one of candidate paths constituted by PDCCH or EPDCCH candidates carrying the control information over different subframes. In this embodiment, the candidate paths may be a subset of a set of all paths, hence, in performing blind detection by the user equipment, complexity of the blind detection may be lowered.

Abstract: User equipment (UE), includes: a receiver configured to receive a specific parameter configured for a mapping manner of an enhanced physical downlink control channel (E-PDCCH) of the UE by an eNB, wherein the specific parameter configured for the mapping manner of the E-PDCCH corresponds to a localized mapping or a distributed mapping; and a processing circuit coupled to a memory configured to determine uplink control channel (PUCCH) resources of the UE according to the specific parameter corresponding to the localized or distributed mapping of the E-PDCCH of the UE and a PUCCH calculation formula.

Abstract: A method for channel measurement, a method for configuring channel measurement and an apparatus therefor includes: receiving, by UE, RRC signaling transmitted by an eNB, the RRC signaling including channel measurement indication and a measurement carrier frequency and a measurement bandwidth configured by the eNB for the UE; determining a channel measurement type by the UE according to the channel measurement indication, the channel measurement type including: performing channel measurement based on a reference signal to which the measurement carrier frequency corresponds, or performing channel measurement based on an actual reference signal; determining a reference signal sequence for performing channel measurement by the UE according to the channel measurement type; and performing channel measurement by the UE on the measurement carrier frequency with the configured measurement bandwidth by using the reference signal sequence.

Abstract: Embodiments of the present invention provide a method and apparatus for configuring resource of machine-type communication. The method includes: allocating a frequency domain resource by an eNB for MTC UE accessed into the eNB; and transmitting RRC signaling by the eNB to the MTC UE according to the frequency domain resource allocated for the MTC UE, so that the MTC UE determines to perform conventional cell handover or frequency domain resource adjustment according to the RRC signaling. With the method and apparatus of the embodiments of the present invention, the MTC UE may be supported to be quickly handed over to an operating frequency configured by the eNB for it, and normal communication may be performed.

Abstract: Embodiments of the present invention provide a method for determining uplink control channel resources; wherein the method includes: receiving, by user equipment (UE), a specific parameter configured for a mapping manner of its enhanced physical downlink control channel (E-PDCCH) by an eNB; and determining its uplink control channel (PUCCH) resources by the UE according to a specific parameter corresponding to the mapping manner of its E-PDCCH and a PUCCH calculation formula. With the embodiments of the present invention, collision of PUCCH resources of different UE is lowered, and/or spectral efficiencies of the PUCCHs are improved.

Abstract: A method for feeding back channel state information, UE and system. The method is applicable to a CoMP transmission system and includes: feeding back channel state information to a network side by way of concatenating more than one pieces of channel state indication information in a bit domain. In this way, a method for feeding back multiple pieces of CSI in the CoMP transmission may be provided. Furthermore, RI information and CQI/PMI information in the CSI may be respectively encoded and mapped, so as to ensure reliable transmission of the RI information and CQI/PMI information.

Abstract: 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.

Abstract: Controlling transmission power of a PRACH and apparatus, including: receiving, by a source RP, relevant parameters of a target RP for receiving a PRACH transmitted by the target RP; transmitting, by the source RP, the relevant parameters of the target RP for receiving the PRACH to CoMP UE; transmitting, by the source RP, an index of a pathloss value between the CoMP UE and the target RP to the CoMP UE, so that the CoMP UE determines the transmission power of the PRACH according to target reception power in the relevant parameters of the target RP for receiving the PRACH and the pathloss value. The CoMP UE may transmit the PRACH to the target RP with correct transmission power, obtain TA value between the CoMP UE and the target RP, and establish uplink synchronization with the target RP, thereby accessing to the target RP.

Abstract: 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.