The invention provides a new technical scheme by aiming at the channel state information feedback of a double-codebook pre-coding frame. According to the new technical scheme provided by the invention, user equipment receives a downlink transmission mode, a feedback mode and a feedback resource which are configured on a base station; according to the downlink transmission mode and the feedback mode, corresponding combined coding processing is executed on a pre-coding matrix index #1(W1) and/or a pre-coding matrix index #2(W2) and other feedback information; and the combined coding-processed channel state information of a downlink channel is fed back to the base station by utilizing the feedback resource, wherein the feedback mode is used for providing rank index (RI) and W1 combined coding and broadband channel quality index (CQI) and W2 combined coding, or, the feedback mode is used for providing broadband CQI and W1 and W2 combined coding, or the feedback mode is used for providing broadband CQI and W1 combined coding. The new technical scheme provided by the invention has the advantages of easiness in implementation, low signaling cost and the like, and can be suitable for long term evolution-advanced/4th generation (LTE-A/4G) cellular communication systems and future 5th generation (5G) cellular communication systems.

PROBLEM TO BE SOLVED: To provide a notification method for resource allocation to a demodulation reference signal (DMRS).SOLUTION: A base station quasi-statically or statically notifies user equipment of an electric power offset value between an average EPRE value of data symbols and an average EPRE value of DMRS of each layer, and dynamically notifies the user equipment of a current channel rank or current DMRS dispersion pattern for the user equipment.

The invention relates to a radio resource control (RRC) state converting method, a base station (eNB) and user equipment (UE). The eNB comprises a transmitting/receiving unit, a calculating unit, an execution determining unit, a request unit, and a precise determination unit, wherein the transmitting/receiving unit is used for performing data communication with an MBMS UE in a cell; the calculating unit is used for calculating the current available RRC connection number of a system; the performing confirmation execution determining unit is used for determining whether RRC state conversion of the MBMS UE needs to be performed according to the current available RRC connection number of the system and a connection number threshold value; the request unit is used for transmitting a measurement report request to all MBMS UE in the cell through the transmitting/receiving unit when the execution determining unit determines that the RRC state conversion of the MBMS UE needs to be performed; and the precise determination unit is used for determining a precise reference measured threshold value of a parameter according to the connection number threshold value and parameter measurement data received by the transmitting/receiving unit and reported by the MBMS UE, and transmitting the precise reference measured threshold value to the all MBMS UE in the cell through the transmitting/receiving unit.

The invention discloses a feedback method of a specific downlink HARQ (Hybrid Automatic Repeat Request) and corresponding base station and user equipment. The feedback method accords with a downlink HARQ feedback mode framework determined according to the standardization in a LTE (Long Term Evolution) Rel-10 and a subsequent version system TDD (Time Division Duplex) mode. The feedback method of the downlink HARQ comprises the following steps of: for each CC (Component Carrier), carrying out airspace and time domain bundling on downlink HARQ states corresponding to all code words, which are allocated in a way of downlink on the CC to generate a general downlink HARQ state; for each CC, carrying out joint coding on the general downlink HARQ state of the CC and information which can be used for reflecting the total number of received PDCCH (Physical Downlink Control Channel) which is allocated in a way of downlink on the CC so as to generate a preset bit number of downlink HARQ feedback information; and transmitting downlink HARQ feedback information corresponding to all CCs.

The invention discloses an uplink control information transmission method, base stations and user equipment. Aiming at certain new problems in uplink control information transmission of a 3GPP (3rd Generation Partnership Project) long term evolution-advanced system (LTE Re1-10), particularly in different uplink channels and/or signal multiplexing, the invention provides a multiplexing method for uplink control channels, data channels and reference signals, an allocation method for uplink control channel resources and the like in certain LTE Re1-10 and subsequent version systems, and corresponding base stations and user equipment.

The invention discloses a resource allocation method by adopting ACK (acknowledgement)/NACK (negative acknowledgement) feedback bound by component carriers. In the method, for a binding component carrier collection of a downlink subframe having data scheduling, if one data scheduling is transmitted on a principal component carrier or at least one data scheduling is subjected to over-carrier scheduling from the principal component carrier and is transmitted on a subsidiary component carrier, single downlink ACK/NACK feedback resource can be allocated by an implicit resource allocation mode; if not, the single downlink ACK/NACK feedback resource can be allocated by a mixed resource allocation mode.

The latest 3GPP LTE release enables coordinated multi-point (CoMP) operation in heterogeneous networks. In this context, a multitude of low power nodes can be deployed within the coverage area of a high-power macro node, allowing to configure different sets of network nodes for the uplink reception from and the downlink transmission to a target mobile terminal. The resulting asymmetry between the uplink composite channel for joint reception and the downlink channel for joint transmission precludes the mobile terminal to accurately estimate the uplink pathloss using standard estimation techniques based on measuring the signal strength of downlink reference signals. In this paper, we introduce the concept of virtual propagation loss for an uplink signal jointly received by multiple geographically separated points. We demonstrate how this new metric can readily be computed at a network controller (.g., the eNodeB in LTE systems), hence enabling a fast correction of the erroneous pathloss estimate at the mobile terminal side through a simple closed-loop feedback for power control. We evaluate our method with extensive system-level simulations, showing that the proposed power control scheme achieves 20% cell-average and 50% cell-edge throughput gain over the LTE Rel.-10.

A novel scheme for Pre-coding Matrix Index (PMI) transmission over Physical Uplink Shared Channel (PUSCH) is provided for Channel State Information (CSI) feedback in dual codebook pre-coding architecture. According to the present invention, the PMI is decomposed into a frequency-selective portion and a non-frequency-selective portion, which are then jointly coded. The frequency-selective portion of the PMI can be one of a beam selection portion and a phase combination portion of the PMI while the non-frequency-selective portion of the PMI can be the other one of the beam selection portion and the phase combination portion of the PMI. The present invention has advantages such as simple implementation and low signaling overhead and is applicable in LTE-Advanced/4G cellular communication systems and future 5G cellular communication system.

The invention discloses a method for enhanced inter-cell interference cancellation (eICIC) in a heterogeneous network, and a corresponding base station and corresponding user equipment. A macro eNodeB (MeNB) defines a signaling to inform a home eNodeB (HeNB) of an event that MeNB cell user equipment (MUE) in a connection mode enters the edge or the neighborhood of an HeNB cell; when HeNB cell user equipment (HUE) is all located at the center of the HeNB cell, the HeNB adopts downlink power control or power settings to reduce the inter-cell interference (ICI) subjected to the MUE on a control channel; the MeNB also can adopt a mechanism of being really or falsely handed over an HeNB cell aiming at that the MUE is either CSG UE (Close Subscriber Group User Equipment) or Non-CSG UE, wherein when the MeNB is falsely handed over to the HeNB cell, a mechanism that the HeNB configures the DRX (Discontinuous Reception) of the HUE can be adopted; and when the MUE in an idle mode enters the edge or the neighborhood of the HeNB cell, if the MUE dwells at the HeNB cell, the HeNB adopts different mechanisms to reduce the ICI subjected to the MUE on the basis that that the MUE is in the connection mode or the idle mode. The method has the characteristics of simplicity, flexibility, high efficiency, and easiness to implement.

The invention provides a joint encoding method and an encoder of a precoding matrix index #1 (W1) and a rank index (R1) aiming at status information feedback of an information channel in a double-codebook precoding framework. First, whether R1 is larger than 2 is judged, if R1 2, a second half branch of the encoding binary tree is adopted to express other independent encodes and/or cascade codes when R1>2. Then processing results of the encoding procedures are output. The joint encoding method and the encoder can be applied to equal length codes or unequal length codes, has the advantages of being easy to achieve, small in signaling expense and the like, and can be suitable for a long term evolution-advanced/4 generation (LTE-A)/4G cellular communication system and a future 5G cellular communication system.