Abstract: A method, apparatus and system for downlink pilot transmission solve the problem of power differences among OFDM symbols caused by Walsh Codes. The transmission method is that dedicated pilots are transmitted in the manner of code division multiplexing (CDM) or hybrid of CDM and frequency division multiplexing (FDM), wherein the dedicated pilots are configured with orthogonal sequence sets according to a preset frequency-domain granularity and rules on the resources for transmitting the dedicated pilots, and the same orthogonal sequence set is employed for the dedicated pilots in each frequency-domain granularity.

Abstract: A resource allocation method based on block repeat division multiple access, involves the steps of: distributing the usable BRBG according to the service requirement of a user; distributing RC series for the said distributed BRBG. The present invention also provides a resource management method based on block repeat division multiple access, which involves the steps of: detecting the operation environment in a district for a period of time; adjusting the number of the BRB in the BRBG of the district, according to the operation environment of the district. The present invention also provides the resource allocation/management device based on block repeat division multiple access.

Abstract: A signal transmission method, which includes: each data symbol needing to be transmitted is weighted and repeatedly extended to obtain the extended data symbol of each data symbol; the extended data symbol of each data symbol and the pilot frequency symbol are modulated and mapped to the specified time-frequency locations of each corresponding block repeat resource block to obtain each corresponding repeat data unit block; each repeat data unit block is transmitted. A signal transmission device is also disclosed in the present invention.

Abstract: A method for uplink transmission based on a time division duplex (TDD) system is provided. In the method, a terminal measures downlink channel state information, estimates the state information of the uplink spatial channel using the channel reciprocity of the TDD system, and selects an uplink spatial pre-coding matrix using the state information of the uplink spatial channel based on a certain criterion, the terminal executes spatial pre-coding using the selected pre-coding matrix, and transmits the data stream to a base station via terminal transmit antennae. A terminal, a base station and a system which are based on the method are also provided. The invention uses the reciprocity of the TDD system channel fully to achieve the maximal channel capacity, thereby optimizes the uplink spatial-transmission.

Abstract: A method, apparatus and system for transmitting signal, the method includes: using the weighting factor sequence, processing weighting repeating modulation for the basic cell block mapped by the data symbol block at the sending end, and obtaining a plurality of the repeating cell blocks corresponding to the said basic cell block; the sending end maps each repeating cell block to the appointed time-frequency position respectively, then sends the signals in the said time-frequency position; and the receiving end demodulates the plurality of data symbol blocks from the blocks, and incorporates the plurality of data symbol blocks; the said receiving end demodulates the incorporated data symbol blocks, and generates the received data. This scheme can be called for short as the block repeating spread diversity transmission technology, it is based on the information symbol in the time-frequency domain two-dimensional grid point.

Abstract: A method using a frame structure which supports relay for wireless transmission, which divides the time slots of a sub-frame into some zones, in which the data is transmitted using the manner of TDD, wherein further including that at least one time slot in a sub-frame is set as a hybrid zone; the transmission of the data is realized through frequency division multiplexing the access link and relay link in the hybrid zone of the sub-frame; and also the multi-hop relay is supported under the two work manners of relay in sub-frame and relay in frame.

Abstract: A method for realizing space division multiplexing is provided. The method comprises steps as follows: A. acquiring space information of users, and calculating space division isolation between the users based on the acquired space information; B. generating a set of user groups for the space division multiplexing based on the space division isolation between users calculated in step A; C. selecting a user group from the set of user groups for the space division multiplexing generated in step B and allocating the same physical resource to two users among the selected user group when conducting the space division multiplexing. An apparatus for realizing space division multiplexing is further provided. Using said method and apparatus, the space division isolation can be realized reasonably with accuracy.

Abstract: A method and a device for performing space coordination among cells are disclosed in the present invention, and the method includes that a base station in a serving cell acquires the channel information of a terminal; the base station in said serving cell performs pre-scheduling to said terminal, according to the acquired channel information of said terminal and the service requirement of said terminal; the base station in said serving cell transfers the pre-scheduling information to the base station in said coordinated cell, so that the base station in said coordinated cell performs coordinated scheduling/coordinated beam-forming with the base station in said serving cell together, according to said pre-scheduling information.

Abstract: Disclosed in the present invention is a coordinated scheduling method which includes that: a base station establishes the correspondences between sub-bands and spatial information, and communicates the correspondences between sub-bands and spatial information with the base station of a cooperative cell (301); said base station implements coordinated scheduling with the base station of said cooperative cell according to the correspondences between sub-bands and spatial information (302). The present invention implements that less scheduling information is transmitted via an X2 interface, and thus promotes the application of the CBF solution in an actual system.

Abstract: The present invention discloses a method of allocating downlink traffic channel resources for multi-carrier HSDPA, and the method includes: first of all, selecting a carrier with the optimum channel condition; determining whether the carrier meets the resource allocation demand of a downlink traffic channel, if yes, allocating resources that meet the downlink traffic channel on the carrier; otherwise, allocating the available resources of the carrier to the downlink traffic channel, and selecting a carrier with the optimum channel condition from the remaining carriers for resource allocation according to the remaining resource allocation demand of the downlink traffic channel. The present invention provides, according to the transmission characteristic of the existing HSDPA multi-carrier, a method for allocating downlink traffic channel resources, which method is applicable for packet data transmission of the multi-carrier HSDPA.

Abstract: A method for implementing upward frequency hopping transmission is adopted to the communication system with time slotted frame structure, and it comprises: receiving the frequency band and frequency hopping mode allocated by the network side; after implementing the upward transmission on one frequency band allocated in the first predivided time period based on the frequency hopping mode, hopping to the other allocated frequency band to implement upward transmission in the predivided second time period. A system and terminal for implementing upward frequency hopping transmission are also provided. By the invention, the frequency hopping in a transmission time interval of the alternative frame structure in the Long Term Evolution can be realized and the frequency diversity gain can be acquired.

Abstract: The present invention provides two methods for configuring transmit power of sounding reference signal (SRS), a network device and a UE. One of the methods includes: with a network device, determining SRS transmit power parameters according to power level of signal previously sent from a UE received by each cell to be detected and/or information of cells to be detected by the UE, and sending the SRS transmit power parameters to the UE. The present invention can have an overall consideration on path losses of multiple cells to be detected when calculating the SRS transmit power. Therefore, the power of the cell having poor channel quality for receiving SRS can be guaranteed, in order to ensure the accuracy of channel estimation.

Abstract: A method and an apparatus for terminal locating in long term evolution system are provided by the present invention, wherein, the method includes: calculating the propagation delay from the terminal to the base station to which the terminal belongs, according to the synchronization time advance of the terminal and the signal reception delay of the base station to which the terminal belongs (101); and determining the distance between the terminal and the base station by using said propagation delay, and determining the position of the terminal relative to that of the base station according to said distance and the direction of arrival of the signal from the terminal (102). By applying the method and the apparatus provided by the present invention, the terminal locating can be achieved with low cost, low implementation complexity, and high precision for location only by using a simple algorithm.

Abstract: A method and a system for coordinated transmission, and a mobile terminal and network side device are provided. The method for coordinated transmission includes: reporting by the terminal of a signal measurement result; determining the coordinated transmission state of the terminal according to the signal measurement result; and providing transmission service for the terminal according to the determined transmission state.

Abstract: Three channel coding schemes for multi-carrier HSDPA packet data transmission are disclosed. The first scheme includes: dividing data into N groups (S210); performing CRC attachment, code block segmentation, channel coding and rate matching on each group of data respectively (S220); scrambling and interleaving the N groups of data unitedly, and then dividing the data into N groups again to perform QAM constellation rearrangement and then map to physical channels of respective carriers for transmission. The second scheme includes: dividing data to be sent into groups (S510); and sending each group of data via a physical channel of a carrier after coding it according to single-carrier HSDPA (S520). The third scheme includes: sending N carrier channels as a whole to a physical layer to perform processing from CRC attachment to QAM constellation rearrangement (S710); dividing the processed data into groups and mapping them to respective carrier channels for transmission (S720).

Abstract: A data transmission method and central controller for a distributed antenna system and a distributed antenna system. The system includes a central controller and multiple wireless transceiver units. The method includes that wireless transceiver units measure the power of the pilot reference signals received from user terminals and forward this power rate to a central controller; the central controller selects a set of wireless transceiver units for transmitting data to the terminal according to the pilot reference signal power rates of the terminals forwarded by the multiple wireless transceiver units; the central controller performs data processing according to said set of wireless transceiver units; the central controller distributes the processed data to the wireless transceiver units in said set of wireless transceiver units, and the wireless transceiver units in said set perform the downlink data transmission.

Abstract: A method for physical layer random access in wideband TDD mobile communication system is disclosed, and the method comprises: receiving the system broadcast message of the cell, obtaining the configuration information of the frequency band in frequency domain in the UpPTS time slot of the cell; and the terminal sends random access sequences to the BS in the UpPTS time slot according to the configuration information of the frequency band in the UpPTS time slot. The configuration information of the frequency band in frequency domain in the UpPTS time slot comprises the information about the frequency band number that the total bandwidth used is divided in the UpPTS time slot, the information about the bandwidth size of each frequency band, and the information about the position of the frequency point.

Abstract: The present invention discloses a transmission method with multi-carrier aggregation, which includes: performing uplink and downlink configurations for each of the component carriers aggregated in a cell and ensuring coexistence of at least one identical uplink sub-frame and at least one identical downlink sub-frame between at least two of the component carriers and compliance of the configuration of at least one of the component carriers with an uplink and downlink configuration of R8; and transmitting the uplink and downlink configuration of any one of the component carriers and those of the other component carriers aggregated with the any one component carrier to an LTE-A UE accessing the corresponding component carrier. The invention further provides a transmission device with multi-carrier aggregation. With the invention, uplink and downlink configurations in an LTE-A system can be performed to accommodate a demand of a TDD system.

Abstract: The present invention discloses a method for inserting a downlink common pilot in a TDD system and more particularly to a method for inserting a downlink common pilot in a TDD system based on OFDMA technology and the method includes two steps. A: data to be transmitted are divided into several segments to be transmitted in several continuous time periods, wherein each time period includes several slots with at least one downlink slot; B: a common pilot is inserted in one downlink slot in the time period. Therefore, the scheduling based on the frequency domain can be achieved by measuring the common pilot channel.

Abstract: Multi-users detecting method and device of OFDM transmission signal include that: a received data sequence is composed of the received signal which is in the position of the time and frequency symbol corresponding to the same data symbol in multi-repeating blocks; the composed repeating channel response sequence array which is corresponding to the received data sequence is determined; the received data sequence is detected to acquire the data symbol information of multi-users by using the composed repeating channel response sequence array. The technical solution can effectively restrain the multi-address interference and the interference between symbols during OFDM transmitting signal and improve the system performance greatly.