Abstract:
Embodiments of the present invention provide a data transmission method, a base station and a user equipment. One transmission method includes: sending, by a base station, first data and random access information to a user equipment UE simultaneously; and acquiring, by the base station, receiving state information of the first data fed back by the UE through the random access information. Another transmission method includes: receiving, by a user equipment, UE, first data and random access information sent by a base station simultaneously; and feeding back, by the UE, receiving state information of the first data to the base station through the random access information. In the technical solutions of the present invention, a base station transmits data to a UE during a random access process, thereby reducing signaling interaction and time delay and improving the data transmission efficiency.
Abstract:
Embodiments of the present invention provide a control channel resource transmission method, a base station and a user equipment which can ensure balance between performance of E-CCEs on a resource set, and further ensure scheduling and receiving performance of the E-CCEs. A control channel resource transmission method includes: mapping, by a base station, more than one enhanced control channel element E-CCE onto a resource set, where each E-CCE is mapped onto a corresponding first resource subset and a corresponding second resource subset respectively, so that each E-CCE occupies a resource of the same size or a difference between sizes of resources occupied by the E-CCEs is less than a preset threshold, where the E-CCEs are carried on the resource set for transmission; and transmitting the resource set that carries the E-CCEs to a user equipment; and demodulating, by the user equipment, the resource set and performing receiving.
Abstract:
A method and device for service time division multiplexing as well as a method and a device for transmitting service are disclosed. The method for service time division multiplexing includes selecting a part or all of radio frames in one time unit as specific radio frames; and selecting a part or all of subframes in the specific radio frames as specific subframes for sending a specific service. The specific service is a multimedia broadcast multicast service, or a unicast service, or one or more than one kind of services transmitted in broadcast or multicast mode.
Abstract:
A quantity of antenna ports of a transmitting apparatus is signalled in a wireless communication system. The quantity of antenna ports of the transmitting apparatus is encoded into a first type information and a second type information. The first type information is transmitted on a physical broadcast channel (PBCH) and the second type information is transmitted on a physical downlink shared channel (PDSCH). The PDSCH is transmitted on at least one antenna port indicated by the first type information.
Abstract:
The present invention discloses a method and an apparatus for transmitting control signaling. The method includes: determining that a physical downlink shared channel PDSCH transmission scheme for a non-backward compatible component carrier is a user equipment-specific reference signal UE RS-based non-precoding matrix indicator Non-PMI feedback transmission scheme or a UE RS-based up to 8 layer transmission scheme; and sending downlink control information DCI to a UE, where the DCI is used to indicate the determined PDSCH transmission scheme. The apparatus includes a determining module and a first sending module. The method and apparatus in embodiments of the present invention can expand application scenarios of the non-backward compatible component carrier, increase spectrum utilization of the system, and avoid a system capacity decrease problem caused by limitations on the application scenarios of the non-backward compatible component carrier.
Abstract:
Embodiments of the present invention disclose methods and apparatuses for receiving and sending a control channel, and are applicable to the field of communications technologies. In the embodiments of the present invention, a base station carries scheduling information of a user equipment of an R11 system in both the PDCCH region and the E-PDCCH region of a downlink subframe. In this way, the user equipment needs to detect the control channel within the PDCCH region and the E-PDCCH region, so that resources of the two regions are available to the user equipment of the R11 system. Moreover, the user equipment detects only the control channel of the first type in the PDCCH region, and detects control channels of the other type in the E-PDCCH region. The method in the embodiments of the present invention does not increase the number of control channel detections.
Abstract:
The present invention discloses a channel state information feedback method and apparatus. User equipment determines a PMI and a CQI, and a feedback expression manner of the PMI and the CQI, where the feedback expression manner includes a first or a second feedback expression manner, and sends the PMI and the CQI to a network device in the determined feedback expression manner of the PMI and the CQI, where the first feedback expression manner includes: using T CQI values to express CQI of M codewords, and using one PMI value to indicate one PMI, where T is less than M, and there is at least one CQI value that can express CQI of at least two codewords; and the second feedback expression manner includes: using M CQI values to express CQI of M codewords. The present invention may be applied to a scenario in which an antenna quantity increases.
Abstract:
A method and an apparatus for measuring communication quality are disclosed. The method includes: acquiring reference signal resource configuration information, where the reference signal resource configuration information at least includes: reference signal port configuration information, and reference signal power information of at least one port group; or the reference signal resource configuration information at least includes: reference signal port configuration information, and a ratio of a power of a data channel in at least one port group to a power of a reference signal; and sending the acquired reference signal resource configuration information to user equipment. Therefore, in a multi-antenna system, accurate signal quality measurement information is acquired, or more accurate channel state information is acquired
Abstract:
The present disclosure provides a method for feeding back a precoding matrix indicator, a receive end and a transmit end, where the method includes: selecting, by a receive end, a precoding matrix W from a codebook based on a reference signal, where W ∈ [ X 1 ( θ 1 ) X 2 ( θ 2 , φ n ) ] , the θ1 and the θ2 indicate a phase difference of weighted values for signal transmission between two neighboring antennas in a first antenna group of a transmit end and a phase difference of weighted values for signal transmission between two neighboring antennas in a second antenna group of the transmit end, the φn indicates a phase difference of weighted values for signal transmission between the first antenna group and the second antenna group, where the signal transmission between the first antenna group and the second antenna group is for a same transmission layer, φ n = ⅇ j 2 π n M , and sending, by the receive end, a precoding matrix indicator PMI to the transmit end.
Abstract:
A quantity of antenna ports of a transmitting apparatus is signalled in a wireless communication system. The quantity of antenna ports of the transmitting apparatus is encoded into a first type information and a second type information. The first type information is transmitted on a physical broadcast channel (PBCH) and the second type information is transmitted on a physical downlink shared channel (PDSCH). The PDSCH is transmitted on at least one antenna port indicated by the first type information.