Fujitsu Corporation

Fujitsu Connected Technologies Limited

Huawei Technologies Co., Limited

Yueqiao Xu

Yi Wang

Yi Zhang

Haibo Xu

Hua Zhou

Hongchao Li

Jianming Wu

Yanling Lu

Feng Yuan

Hao Chen

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.

Signal retransmission apparatus and method and communication system

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.

Method for feeding back channel state information, UE and system

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.

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.

Method and apparatus for determining uplink control channel resources

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.

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.

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Beijing, China

Yueqiao Xu