Abstract:
A method, a communication device for transmitting data in a communication system, and the communication system. The method includes: detecting the current channel quality; determining the overlapping coding times corresponding to the detected channel quality according to the corresponding relation between the channel quality and the overlapping coding frequency; performing coding operation of overlapping coding multiplexing technique to the data which is to be transmitted using the determined overlapping coding times and transmitting the coded data. The method improves the reliability of data transmission under the circumstance of channel quality being relatively poor, and improves the transmission efficiency, avoids the resource waste under the circumstance of channel quality being better.
Abstract:
A community antenna system in a closed loop mode and a method thereof are provided, the system includes two groups of pre-weighting processing modules, beamforming modules and antenna arrays connected in turn. The method includes the following processes: performing the pre-weighting processing on a transmission signal respectively according to the channel information corresponding to each of two antenna arrays; determining beamforming weight vectors according to two groups of steering vectors corresponding to the two antenna arrays, and performing weighting processing on the two pre-weighting processed transmission signals respectively to form two directional beams directed to the receiving antenna of a target mobile terminal; and transmitting the two directional beams via two antenna arrays with orthogonal polarization modes respectively.
Abstract:
A method, an apparatus and a system for sending Sounding Reference Signal (SRS) and a method, an apparatus and a system for receiving SRS are disclosed in the present invention, which are used to reduce the requirement for Time Frequency Code (TFC) resource during the process of sending the SRS, and meanwhile to ensure the precision of channel information estimation. The method includes the steps of: determining a first frequency band required by sending the SRS, and determining a second frequency band whose width is smaller than the width of the first frequency band; according to the mode that the average interval for sending the SRS on the first frequency band is larger than the average interval for sending the SRS on the second frequency band, respectively sending the SRS on the first frequency band and the second frequency band.
Abstract:
A communication method and device are applicable in a mobile communication system of LTE Type 2 wideband TDD. The method includes: transmitting, by a first communication device, to a second communication device a radio frame, where the radio frame includes a data timeslot for transmitting data, an uplink special timeslot and a downlink special timeslot for carrying synchronizing information, and the data timeslot is shorter than an original data timeslot by a first timeslot, and at least part of the first timeslot is located at the downlink special timeslot.
Abstract:
A method for data processing is provided, the method comprises: determining the predicted transmission time required by the data packet to be transmitted currently during the transmission course and the residence time for the data packet residing in the buffer; when the sum of the predicted transmission time and the residence time is greater than the predetermined air interface time delay, discarding the data packet. By utilizing the technical scheme of the invention, the discarding time of the data packet is dynamically adjusted, the packet discarding rate is reduced, and the service quality is improved. An apparatus for data processing is also provided.
Abstract:
A method and device for determining an antenna cooperation set, and a method and device for determining a base station cooperation set in the mobile communication field are provided. The method includes that a signal joint processing system obtains the channel quality between a mobile terminal and at least two base stations, determines the base stations, which are corresponding to the channel quality higher than the channel quality threshold, as the cooperation base station set of the mobile terminal. Because the channel quality between the mobile terminal and the antenna of each base station is used to determine the cooperation antenna set dynamically, therefore, the determined cooperation antenna set includes the antennae that have very strong interference to the mobile terminal, or the antennae that have been strongly interfered by the mobile station. By performing signal joint processing to the antennae, signal interference among adjacent cells can be reduced, better accuracy for detecting mobile terminal signals can be obtained, the accuracy for receiving signals by the mobile station is improved, and namely the communication quality between the mobile terminal and the base stations is improved.
Abstract:
A method of wideband radio transmission is disclosed, the method includes the following steps: obtaining the parallel data symbols; encoding the obtaining parallel data symbols respectively; superposing the encoded data symbols; performing the fast Fourier inverse transform for the superposed data symbols and transmitting them. Applying the solution, the transmission efficiency and the transmission dependability of the OFDM system is raised. An apparatus for wideband radio transmission and a transmission system are also disclosed.
Abstract:
A method for controlling the downlink transmission and a device for the signal associated processing in the coordinated multi-point transmission system are provided, which relate to the mobile communication technology, for optimizing the downlink transmission control in the coordinated multi-point transmission system. The embodiment aims at the coordinated multi-point transmission system, and in the base station side according to the SINR1 level of the frequency domain resource block fed back by the user, the mating result of the user, the associated resource allocation result and the pretreatment weight value result, determines the Modulation and Coding Scheme (MCS) level of the scheduled user channel to provide the accuracy of the MCS level, thus optimizing the downlink resource configurations, further increasing the throughput of the system.
Abstract:
A signal transmission method and related mobile terminal and base station thereof. The method includes: the base station determines a special transmit time interval (TTI) in a downlink carrier (S301); the corresponding time length for which a first type mobile terminal has sent an uplink sounding reference signal to the base station is included in the special TTI; the first type mobile terminal is a mobile terminal which sends the uplink sounding reference signal to the base station in the special TTI; the base station sends a first control signal within a first time length in the special TTI (S302); the first control signal enables a second type mobile terminal to determine that the base station hasn't sent a downlink signal within the remainder time length in the special TTI; the second type mobile terminal is a mobile terminal which does not send the uplink sounding reference signal to the base station in the special TTI. Using the method and the related device enables the future mobile communication system which uses the downlink carrier to introduce the uplink transmission to be compatible with the existing mobile terminals and the future mobile terminals.
Abstract:
A method of wideband radio transmission is disclosed, the method includes the following steps: obtaining the parallel data symbols; encoding the obtaining parallel data symbols respectively; superposing the encoded data symbols; performing the fast Fourier inverse transform for the superposed data symbols and transmitting them. Applying the solution, the transmission efficiency and the transmission dependability of the OFDM system is raised. An apparatus for wideband radio transmission and a transmission system are also disclosed.