Abstract: The present invention discloses a method and a device for selecting a cell in a heterogeneous network. The method comprises estimating signal to noise ratios when a terminal is scheduled by a macro base station and a low power base station respectively by using the parameters of the macro base station and the low power base station measured by the terminal and related to signal reception quality (S101); mapping the estimated signal to noise ratios to throughputs, and obtaining a first throughput when the terminal is scheduled by the macro base station, and a second throughput when the terminal is scheduled by the low power base station (S102); and adjusting a cell selection offset according to the first throughput and the second throughput, so that the terminal can perform cell selection according to the adjusted cell selection offset (S103).

Abstract: A method, a wireless communication system, destination node and relay node includes receiving by a destination node at current time slot the data transmitted by at least one source node; demodulating and decoding the data transmitted by at least one source node to obtain a decoding result; receiving the decoding result transmitted by first relay nodes, the decoding result being obtained by the first relay nodes through demodulating and decoding the data transmitted by at least one source node and received at the current time slot; and notifying the source node to retransmit the data or transmit new data at the next time slot by the destination node according to the result of the demodulating and decoding of the data of the source node and the decoding result of the first relay nodes.

Abstract: A mobile terminal, a micro base station, a macro base station, a communication system and a communication method. The method includes receiving from a micro base station a designation of specific subframe and a designation of feedback mode; judging whether a current subframe is a specific subframe designated by the micro base station; and measuring and feeding back the channel condition of the current subframe in a joint transmission feedback mode when the current subframe is the specific subframe designated by the micro base station, and measuring and feeding back the channel condition of the current subframe in a feedback mode designated by the micro base station when the current subframe is not the specific subframe designated by the micro base station.

Abstract: A method, device, system, User Equipment (UE), computer readable medium and programme product for allocating uplink channel resource of cooperative multi-point transmission/reception are disclosed. The method includes receiving involved information for allocating uplink control channel resource or uplink detection reference signal resource in at least one of other cells; according to the information for allocating the uplink control channel resource or the uplink detection reference signal resource in the involved main cell and at least one of other cells, determining the uplink channel resource which does not overlap the uplink control channel resource or the uplink channel resource allocated for an uplink communication in the main cell and at least one of other cells; and allocating the determined uplink channel resource for the uplink cooperative multi-point transmission/reception in the involved main cell and at least one of other cells.

Abstract: A method for reporting channel state information, base station and user equipment. The method includes: configuring a set of multiple measurement subsets by a base station; correspondingly storing the configured set of multiple measurement subsets and corresponding indication information, so as to establish mapping relation between the indication information and the set of measurement subsets; and notifying the mapping relation to UE, such that the UE, in needing to report channel state information, uses the obtained indication information and the mapping relation to determine measurement subsets related to reporting the channel state information, so as to report channel state information of the measurement subsets to the base station.

Abstract: A method for setting subframes, a macro base station, a mobile terminal and a communication system. The method for setting subframes in a macro base station comprising: receiving, from a micro base station, information that indicates main carrier and auxiliary carrier used by a mobile terminal at cell edge of the micro base station; and setting limited blank subframes on a carrier corresponding to the auxiliary carrier and used by the macro base station, according to the information; wherein the limited blank subframe is a subframe having a control area which can be used for transmitting control information, and a data area in which only a part of subcarriers can be used for transmitting data.

Abstract: A method and device for interference coordination in a communication system and the corresponding communication system, mobile station and base station (BS) are disclosed. In the method for interference coordination, a BS of a Pico Cell shifts a transmission frame backwards; a BS of a Macro Cell selects a sub-frame for transmitting a Channel State Information-Reference Signal (CSI-RS) from transmission frames of the Macro Cell itself, to enable the sub-frame of the BS of Macro Cell for transmitting CSI-RS to at least not overlap a sub-frame of the BS of the Macro Cell for transmitting a public channel and a sub-frame of the BS of Pico Cell partially; and the sub-frame of the BS of the Macro cell for transmitting the public channel at least does not overlap the sub-frame of the BS of Pico Cell for transmitting the public channel partially.

Abstract: A method, device, terminal, base station and system for cross-carrier scheduling are disclosed. Said method for cross-carrier scheduling includes: according to the number of component carriers involved in cross-carrier scheduling, adjusting the size of the control part, which is used for transmitting control information, in the frame corresponding to the component carrier; performing cross-carrier scheduling by utilizing the adjusted control part. According to the present invention, the situation that the number of component carriers involved in cross-carrier scheduling increases can be adapted to, and the block situation caused by no resources for transmitting the control information can be avoided.

Abstract: A method for measuring channel state information, a UE and base station are described. The method includes: receiving in a subframe of Pico cell, by the user equipment, the channel state information reference symbol or common reference symbol of the Pico cell, the subframe of Pico cell corresponding to an almost blank subframe in a measurement set; and measuring the channel state information of the Pico cell based on the channel state information reference symbol or common reference symbol of the Pico cell. In certain embodiments, the UE configured with coordinated multi-point mode may measure the CSI of the Macro cell and the Pico cell without muting or with decreased muting by using the measurement set, thereby overcoming or partially overcoming the problems brought by RE muting.

Abstract: A method for obtaining parameters, base station and terminal equipment. The method includes: receiving by a terminal equipment a request message sent by a base station reporting related parameters of a random access procedure occurred in at least one carrier, the request message including carrier identification information; and sending the related parameters of a random access procedure occurred in the at least one carrier by the terminal equipment to the base station according to the request message, such that corresponding random access optimization is performed by a network side by using the related parameters.

Abstract: Detecting interference user and home base station including: pre-configuring the cell type information of a home base station as an open cell type, and broadcasting the cell type information by the home base station in the cell; determining whether user equipment is one belonging to the home base station by the home base station according to the related information transmitted by the user equipment via a random access procedure, wherein the related information includes user information or a random access preamble; and determining by the home base station that the user equipment is an interference user, if the user equipment is not one belonging to the home base station.

Abstract: A method includes receiving downlink data transmitted by a base station via a primary and secondary component carrier in a predetermined order; detecting the received downlink data to obtain indication information on correctly receiving and wrongly receiving the downlink data, or no control information received, allocating corresponding uplink resources according to the primary and secondary component carrier where the detected downlink data is present; arranging the indication information obtained through detecting according to the order of transmitting the downlink data by the base station to obtain an indication information sequence; generating an uplink response signal and determining the uplink resources used to feed back the uplink response signal; transmitting the uplink response signal to the base station using the determined uplink resources, so the base station determines the downlink data retransmitted according to the uplink response signal fed back in the uplink resources, enabling the BS avoid u

Abstract: A contention-based uplink data transmission method, apparatus and system are provided. The method may include that: a main control node in a communication system receives data transmitted via uplink contention transmission resources, and decodes the data, wherein the uplink contention transmission resources are uplink transmission resources which the main control node allocates to a plurality of terminal nodes in the communication system and via which the plurality of terminal nodes transmits data in a contention-based way; and the main control node sends reception status information to each terminal node transmitting the data via the uplink contention transmission resources, wherein the reception status information reflects whether the data transmitted from each terminal node has been decoded successfully.

Abstract: A User equipment selecting first user equipment in a mode of precoding transmission and second user equipment in a mode of diversity transmission; a parameter determining a modulation mode, the number of transmission layers and a precoding matrix according to channel quality information, precoding matrix information and number of transmission layers sent from the first user equipment and channel quality information and number of transmission layers sent from the second user equipment; according to the modulation mode and the number of transmission layers, generating first and second symbol sequence from first and second source data; hierarchically modulating the first and the second symbol sequence to generate a mixed symbol sequence; layer mapping and precoding for the mixed symbol sequence to generate transmission signals; and transmitting the precoding matrix and the number of transmission layers to the second user equipment; sending the transmission signals to the first and second user equipments.

Abstract: A base station and a mobile station, the base station includes common antennas configured to transmit signals to all mobile stations (UEs) served by the base station; a special antenna to transmit a signal to a UE which is served by the base station and supports the special antenna; a sub-frame selecting unit to select a sub-frame for transmitting a common pilot of the special antenna in the current frame; a resource block (RB) selecting unit to select a RB for transmitting the common pilot, in the sub-frame for transmitting the common pilot selected by the sub-frame selecting unit; a notifying unit to notify the sub-frame and RB for transmitting the common pilot antenna selected by the UE supporting the special antenna in a cell; and a transmitting unit to transmit a signal having the common pilot in the RB selected by the RB selecting unit.

Abstract: A method for multiple-input multiple-output (MIMO) collaborative communication in a wireless communication system includes at least one user equipment and M base stations performing collaborative communication with the user equipment. Here, M is an integer that is greater than or equal to 2. The method includes the following processes for each user equipment: a first level of MIMO pre-coding process is performed for each base station to acquire each first level of pre-coding matrix corresponding to each base station; a second level to the X-th level of MIMO pre-coding process is performed sequentially to acquire the second level to the X-th level of pre-coding matrices of the corresponding base stations. Here, X is an integer that is greater than or equal to 2. A pre-coding device, a user equipment and a wireless communication system related to the method are also provided.

Abstract: A method and device for carrier management in a carrier aggregation system, includes signaling which carries an additional carrier measurement indication sent to a User Equipment (UE); a measurement report received from the UE; when the downlink traffic of the UE increases, if the recorded carriers in the current downlink carrier set of the UE can not meet the requirement of the downlink traffic data rate, according to the additional carrier measurement report, at least one additional carrier is configured and activated, and the UE is notified to perform the corresponding configuration operation. In addition, according to the measurement result and the change in the downlink traffic of the UE, the base station can also perform the deactivation, activation replacement and removal of the additional carrier for the user, and notify the UE to perform the corresponding configuration operations.

Abstract: Disclosed in the present invention is a method in the Multiple Input Multiple Output system for obtaining downlink channel directional information. The method includes steps: a base station receives downlink channel directional information which is fed back by a mobile station during the feedback period, and determines the relation between an uplink channel directional information and the received downlink channel directional information; the base station also estimates the downlink channel directional information of non-feedback sub-frame by use of the relation, those non-feedback sub-frame are not fed back during the feedback period. Furthermore, a base station and corresponding mobile station in MIMO system are also provided in the present disclosure.

Abstract: The present invention provides method and apparatus for designing modulation and coding set of communication System. The method for designing modulation and coding set designs a proper set of modulation and coding schemes (MCS), based on probability distribution of the quality of received signal in the communication system, so as to optimize the whole performance of the communication system. The method comprises the steps of: acquiring the probability distribution of the quality of the received signal in the communication system; performing a calculation on the target performance of the communication system based on the acquired probability distribution of the quality of the received signal and a plurality of MCSs, to design a proper set of MCSs for the communication system, so that a region where the probability of the quality of the received signal appears more frequently are provided with more levels of the MCSs.

Abstract: A demodulation reference signal generator includes a non-correlation sequence generator to generate a non-correlation sequence for RS of a first resource block; a first spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a first frequency resource of the first resource block, by using a first group of codes; a second spectrum spreading unit to spread spectrums of elements in the non-correlation sequence for RS to be mapped to a second frequency resource of the first resource block, using a second group of Codes; the first and second frequency resources are adjacent frequency resources used for RS transmission in the first resource block, and the first and second groups of Codes are mirrors in column to each other; and a mapping unit to map the spectrum-spread elements to the first and second frequency resources.