WO2015042855A1 - 通信方法、基站和用户设备 - Google Patents
通信方法、基站和用户设备 Download PDFInfo
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- WO2015042855A1 WO2015042855A1 PCT/CN2013/084423 CN2013084423W WO2015042855A1 WO 2015042855 A1 WO2015042855 A1 WO 2015042855A1 CN 2013084423 W CN2013084423 W CN 2013084423W WO 2015042855 A1 WO2015042855 A1 WO 2015042855A1
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- beams
- pilot signal
- base station
- pilot
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
- H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0868—Hybrid systems, i.e. switching and combining
- H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
Definitions
- the present invention relates to the field of communications, and in particular, to a communication method, a base station, and a user equipment. Background technique
- MIMO Multiple-Input and Multiple-Output
- the reference signal that is, the pilot signal
- the reference signal is a known signal that is provided by the base station to the User Equipment (UE) for channel estimation or channel measurement by the UE.
- UE User Equipment
- the basic idea of pilot signal design is that each port corresponds to one pilot signal.
- each antenna transmits a pilot signal omnidirectionally.
- the base station needs to send pilot signals to the UE through all ports, thereby causing the base station to configure the UE.
- the pilot signal is less flexible, and the UE also needs to measure the pilot signal for all ports, increasing the measurement complexity. Summary of the invention
- the embodiments of the present invention provide a communication method, a base station, and a user equipment, which can improve the flexibility of configuring a pilot signal for a UE, and can reduce the measurement complexity of the pilot signal by the UE.
- a communication method including: forming, by using an antenna weighting manner, m beams, where m is a positive integer greater than one; determining each of the m beams according to an uplink sounding signal of the user equipment UE Uplink receiving power; selecting n beams from the m beams according to uplink receiving power of each of the m beams, n is a positive integer, and n ⁇ m; through the n beams, The UE transmits a pilot signal.
- the selecting, according to the uplink received power of each of the m beams, the n beams from the m beams including: from the m An optimal beam is selected among the plurality of beams, wherein an uplink received power of the optimal beam is the largest among the m beams; and the transmitting, by the n beams, a pilot signal to the UE, including: Passing the optimal beam, transmitting a pilot signal to the UE.
- the method before the sending the pilot signal to the UE by using the optimal beam, the method further includes: The UE sends the first signaling, where the first signaling is used to indicate the configuration of the pilot signal corresponding to the optimal beam, the start time and the transmission period of sending the pilot signal, and the pilot signal is configured. And indicating a time-frequency resource occupied by the pilot signal.
- the method further includes: The UE receives the first measurement information, where the first measurement information is obtained by the UE according to the first signaling, and the first measurement information is used according to the first measurement information.
- the UE sends data.
- the first measurement information includes a channel quality indicator CQI; or the first measurement information includes the CQI, and the following At least one: rank, precoding matrix indicating PMI.
- the selecting, according to the uplink received power of each of the m beams, the n beams from the m beams including: according to the m The uplink received power of each beam in the beam determines the sum of the uplink received power of each of the q sets of beams, wherein the q sets of beams are obtained by dividing the m beams, each set of beams including n beams And selecting a group of beams from the q group of beams such that a sum of uplink received powers of the selected group of beams in the q group of beams is the largest.
- the n beams of the selected one of the selected ones are configured corresponding to the n types of pilot signals, where the pilot signals are Configuring a time-frequency resource respectively occupied by the pilot signal;
- Transmitting the pilot signal to the UE by using the n beams including: transmitting, by using n beams of the selected group of beams, to the UE according to the n types of pilot signal configurations Frequency signal.
- the n beams in the selected one of the selected groups of beams are respectively configured according to the n types of pilot signals
- the method further includes: sending, to the UE, second signaling, where the second signaling is used to indicate the configuration of the n types of pilot signals, and start sending the pilot signal Time and sending cycle.
- the n beams in the selected one of the selected groups of beams are respectively configured according to the n pilot signals
- the method further includes: receiving, by the UE, second measurement information, where the second measurement information includes, by the UE, the pilot signal measured according to the second signaling. a measurement result; determining a data transmission beam corresponding to the UE according to the selected group of beams and the second measurement information; and transmitting data to the UE by using the data transmission beam.
- the determining, according to the selected one of a group of beams and the second measurement information, determining a data transmission beam corresponding to the UE includes: determining a spectral efficiency corresponding to the n measurement results respectively; determining an optimal measurement result among the n measurement results according to a spectral efficiency corresponding to the n measurement results, where the n The optimal measurement result in the measurement result corresponds to the highest spectral efficiency; the data transmission beam is determined according to the optimal measurement result and the selected set of beams.
- each of the n measurement results includes a channel quality indicator CQI; or
- Each of the measurement results includes the CQI, and at least one of the following: a rank, a precoding matrix indicating a PMI.
- the pilot signal is a channel state information reference Signal CSI-RS.
- a communication method including: receiving, by a base station, pilot signals that are sent by using n beams, where the n beams are based on uplink received power of each of the formed m beams from the base station. Selected among m beams, m is a positive integer greater than 1, n is a positive integer, and n ⁇ m; the pilot signal is measured.
- the receiving, by the receiving, the pilot signal sent by the n beams includes: receiving, by the base station, a pilot signal that is sent by using an optimal beam, where The optimal received power of the optimal beam in each beam is the largest.
- the method before the receiving, by the receiving, the pilot signal that is sent by the optimal beam, the method further includes: receiving, by the base station, a first signaling, where the first signaling is used to indicate a pilot signal configuration corresponding to the optimal beam, a start time and a sending period of sending the pilot signal, where the pilot signal is configured to indicate Describe the time-frequency resources occupied by the pilot signals;
- the measuring the pilot signal includes: measuring the pilot signal according to the first signaling to obtain first measurement information.
- the method further includes: sending the first measurement information to the base station; receiving, by the base station, the optimal beam and according to The data sent by the first measurement information.
- the first measurement information includes a channel quality indicator CQI; or the first measurement The information includes the CQI, and at least one of the following: rank, precoding matrix indicating PML
- the receiving, by the receiving, the pilot signal sent by the n beams includes: receiving, by the base station, a pilot signal that is sent by using n beams in a set of beams And the set of beams is selected by the base station from the q group beams obtained by the m beam splitting, each group of beams includes n beams, and uplink receiving of the group of beams in the q group of beams The sum of power is the largest.
- the n beams of the set of beams are corresponding to the n types of pilot signal configurations, and the pilot signal configuration a time-frequency resource used to indicate that the pilot signal is occupied;
- the receiving, by the base station, the pilot signal that is sent by using the n beams of the set of beams including: receiving, by the base station, respectively, by using n beams of the set of beams according to the n pilot configurations. Frequency signal.
- the method includes: receiving, by the base station, second signaling, where the second signaling is used to indicate the configuration of the n types of pilot signals, a start time and a sending time of sending the pilot signal Cycle
- the measuring the pilot signal comprises: measuring the pilot signal according to the second signaling to obtain n measurement results.
- the method further includes: sending, to the base station, second measurement information, where the second measurement information includes the n measurement results; Receiving data sent by the base station through a data transmission beam, where the data transmission beam is determined by the base station according to the group of beams and the second measurement information.
- each of the n measurement results includes a channel quality indicator CQI; or
- Each of the measurement results includes the CQI, and at least one of the following: a rank, a precoding matrix indicating a PMI.
- the pilot signal is a channel state information reference signal CSI-RS.
- a base station including: a weighting unit, configured to form m beams by using antenna weighting, where m is a positive integer greater than 1, and a first determining unit, configured to perform uplink detection according to user equipment UE a signal, determining an uplink received power of each of the m beams; a selecting unit, configured to select n beams from the m beams according to an uplink received power of each of the m beams, where n is positive An integer, and n ⁇ m; a transmitting unit, configured to send, by using the n beams, a pilot signal to the UE.
- the selecting unit is specifically configured to select an optimal beam from the m beams, where an optimal beam is uplinked in the m beams
- the receiving power is the largest;
- the sending unit is specifically configured to pass the optimal beam to the
- the UE transmits a pilot signal.
- the sending unit is further configured to: before the sending, by using the optimal beam, a pilot signal to the UE, Sending, to the UE, first signaling, where the first signaling is used to indicate a pilot signal configuration corresponding to the optimal beam, a start time and a transmission period of sending the pilot signal, and the pilot signal And configured to indicate a time-frequency resource occupied by the pilot signal.
- the method further includes: a first receiving unit, where the first receiving unit is configured to pass the optimal beam at the sending unit After the pilot signal is sent to the UE, the first measurement information is received from the UE, where the first measurement information is that the UE measures the pilot signal according to the first signaling; a sending unit, configured to pass the optimal beam, according to the first measurement information, to the
- the UE sends data.
- the selecting unit is specifically configured to: determine, according to uplink receiving power of each of the m beams, uplink receiving of each group of beams in the q group of beams a sum of powers, wherein the q sets of beams are obtained by dividing the m beams, each group The beam includes n beams; a set of beams is selected from the q sets of beams such that a sum of uplink received power of the selected set of beams in the q sets of beams is maximized.
- the n beams of the selected group of beams are corresponding to the n pilot signal configurations, and the pilot signals are Configuring a time-frequency resource for the pilot signal, where the transmitting unit is configured to respectively adopt n beams in the selected group of beams, and according to the n types of pilot signals
- the UE transmits a pilot signal.
- the sending unit is further configured to use, in the The n types of pilot signals are configured to send the second signaling to the UE, and the second signaling is used to indicate the n types of pilot signals, and send the guide.
- the start time and the transmission period of the frequency signal are configured to use, in the The n types of pilot signals.
- the second receiving unit and the second determining unit are further included, where the second receiving unit is configured to be used in the sending unit respectively After receiving the pilot signal to the UE according to the n types of pilot signal configurations, the second measurement information is received from the UE by using the n beams of the selected one of the set of beams, where the second measurement information includes And determining, by the second signaling, the n measurement results obtained by the UE according to the second signaling, where the second determining unit is further configured to: according to the selected group of beams and the second measurement information, Determining a data transmission beam corresponding to the UE; the sending unit is further configured to send data to the UE by using the data transmission beam.
- the second determining unit is specifically configured to: determine a spectral efficiency corresponding to the n measurement results respectively; a spectral efficiency corresponding to each of the n measurement results, wherein an optimal measurement result is determined among the n measurement results, wherein the optimal measurement result corresponds to a maximum spectral efficiency among the n measurement results;
- the data transmission beam is determined by an optimal measurement result and the selected set of beams.
- a fourth aspect provides a user equipment, including: a receiving unit, configured to receive a pilot signal sent by a base station through n beams, where the n beams are uplinks of each of the formed m beams according to the base station The received power is selected from the m beams, m is a positive integer greater than 1, n is a positive integer, and n ⁇ m; and a measuring unit is configured to measure the pilot signal.
- the receiving unit is specifically used to And receiving, by the base station, a pilot signal that is sent by using an optimal beam, wherein an uplink received power of the optimal beam is the largest among the m beams.
- the receiving unit is further configured to receive, before the receiving base station sends the pilot signal by using an optimal beam
- the first signaling sent by the base station where the first signaling is used to indicate a pilot signal configuration corresponding to the optimal beam, a start time and a sending period of sending the pilot signal, and the pilot signal
- the measurement unit is configured to perform measurement on the pilot signal according to the first signaling to obtain first measurement information.
- the method further includes: a sending unit, where the sending unit is configured to send the first measurement information to the base station; The unit is further configured to receive data that is sent by the base station by using the optimal beam and according to the first measurement information.
- the receiving unit is specifically configured to receive a pilot signal that is sent by the base station by using n beams in a set of beams, where the group of beams is The base station selects from the q group beams obtained by the m beam divisions, each group of beams includes n beams, and the sum of uplink reception powers of the group of beams in the q group beams is the largest.
- the n beams in the set of beams are configured corresponding to n pilot signals, and the pilot signal configuration is configured.
- a receiving unit configured to receive, by the receiving unit, a pilot that is sent by the n beams in the set of beams according to the n types of pilot configurations. signal.
- the receiving unit is further configured to: pass, by the receiving, the base station, respectively, n beams in the set of beams Before receiving the pilot signal sent by the n pilot configurations, receiving the second signaling sent by the base station, where the second signaling is used to indicate the configuration of the n pilot signals, and send the pilot signal a starting time and a sending period; the measuring unit is specifically configured to measure the pilot signal according to the second signaling to obtain n measurement results.
- the method further includes: a sending unit, where the sending unit is configured to send, to the base station, second measurement information, where the second measurement The information includes the n measurement results; the receiving unit is further configured to receive data sent by the base station by using a data transmission beam, where the data transmission beam is the group according to the group The beam and the second measurement information are determined.
- the uplink received power of each of the m beams is determined according to the uplink sounding signal of the UE, and n beams are selected from the m beams according to the uplink received power of each of the m beams.
- the UE transmits the pilot signal instead of transmitting the pilot signal to the UE through all the beams, thereby improving the flexibility of configuring the pilot signal for the UE and reducing the measurement complexity of the pilot signal by the UE.
- FIG. 1 is a schematic flow chart of a communication method in accordance with one embodiment of the present invention.
- FIG. 2 is a schematic flow chart of a communication method according to another embodiment of the present invention.
- FIG. 3 is a schematic diagram of an example of a scenario in which an embodiment of the present invention is applicable.
- FIG. 4 is a schematic diagram of another example of a scenario in which an embodiment of the present invention may be applied.
- FIG. 5 is a schematic block diagram of a base station in accordance with one embodiment of the present invention.
- Figure 6 is a schematic block diagram of a UE in accordance with one embodiment of the present invention.
- FIG. 7 is a schematic block diagram of a base station according to another embodiment of the present invention.
- FIG. 8 is a schematic block diagram of a UE according to another embodiment of the present invention. detailed description
- GSM Global System of Mobile communication
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access Wireless
- GPRS General Packet Radio Service
- LTE Long Term Evolution
- UE User Equipment
- MT mobile terminal
- GPRS General Packet Radio Service
- LTE Long Term Evolution
- UE User Equipment
- MT mobile terminal
- RAN Radio Access Network
- the user equipment may be a mobile terminal, such as a mobile telephone (or "cellular" telephone) and a computer with a mobile terminal, for example, a mobile device that may be portable, pocket, handheld, computer built, or in-vehicle.
- the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved Node B (eNB or e-NodeB) in LTE.
- BTS Base Transceiver Station
- NodeB base station
- eNB evolved Node B
- e-NodeB evolved Node B
- FIG. 1 is a schematic flow chart of a communication method in accordance with one embodiment of the present invention. The method of Figure 1 is performed by a base station.
- m beams are formed, and m is a positive integer greater than 1.
- a base station can form m differently directed beams by antenna weighting.
- Each beam can correspond to one or more ports.
- each beam can correspond to one port, and then m beams can correspond to m ports.
- each beam can correspond to two ports, then m beams can correspond to mx2 ports.
- the base station can receive the uplink detection of the UE through the port corresponding to each beam.
- the (Sounding) signal determines the uplink received power of the beam according to the uplink sounding signal received by the port corresponding to each beam.
- n beams from the m beams where n is a positive integer, and n ⁇ m.
- the base station can select n beams from m beams by comparing the magnitude of the uplink received power of each beam.
- the base station may send a pilot signal to the UE by using a port corresponding to each of the n beams.
- a pilot signal design scheme that is, each pilot port maps a pilot signal
- the base station needs to transmit a pilot signal to the UE through all the ports corresponding to the m beams, so that the base station is flexible when configuring the pilot signal for the UE. Poor sex.
- the measurement needs to be passed.
- the pilot signals transmitted by all the ports of the m beams have a large measurement complexity.
- the base station determines the uplink receiving power of each of the m beams according to the uplink sounding signal of the UE, and selects the port corresponding to the n beams of the m beams according to the uplink receiving power of the m beams to send to the UE.
- the pilot signal can sufficiently improve the flexibility of the base station to configure the pilot signal for the UE.
- n is smaller than m, it is not necessary for the UE to measure the pilot signals transmitted by all the beams, so that the measurement complexity can be reduced.
- the uplink received power of each of the m beams is determined according to the uplink sounding signal of the UE, and n beams are selected from the m beams according to the uplink received power of each of the m beams.
- the UE transmits the pilot signal instead of transmitting the pilot signal to the UE through all the beams, thereby improving the flexibility of configuring the pilot signal for the UE and reducing the measurement complexity of the pilot signal by the UE.
- each of the m beams is used.
- the uplink received power of the beams selects n beams from the m beams, and transmits pilot signals to the UE through n beams instead of transmitting pilot signals to the UE through all beams, thereby enabling pilots in a large-scale antenna system. Signal transmission.
- the pilot signal described above may be a pilot signal used only for channel measurement.
- the base station does not need to transmit omnidirectionally, and therefore can transmit through one or more of the beams.
- the pilot signal may be a Channel State Information-Reference Signal (CSI-RS).
- CSI-RS Channel State Information-Reference Signal
- the base station may obtain the uplink received power of each beam after a period of time.
- the base station can set a time domain counter to count the uplink received power of each beam within the window length of the time domain filtering.
- the uplink received power of each beam can be replaced by the average uplink received power of each beam.
- the base station may determine the average uplink received power of each beam according to the following steps:
- the base station can receive the uplink sounding signal of the UE through all ports corresponding to the m beams.
- the base station may perform channel estimation based on the uplink sounding signal at each port to determine a corresponding channel coefficient of each port on the subcarrier. For example, for the jth port corresponding to the i th beam of the m beams, the estimated channel coefficient on the subcarrier k may be jk .
- the base station can calculate the average power of the channel coefficients of each beam on all ports and all subcarriers.
- the number of all ports corresponding to each beam; N sub can represent all subcarriers.
- the base station can filter the average uplink received power of each beam in the time domain. Accordingly, the time domain counter is incremented by one.
- the base station can determine whether the time domain counter reaches the window length of the time domain filtering. If the time domain counter does not reach the window length of the time domain filtering, the base station returns to perform the above step A).
- the average uplink received power of each of the m beams in the period may be used as the uplink received power of the m beams, and then used for the processing of step 130.
- the base station may select one or more beams from the m beams based on the uplink received power of the m beams to transmit a pilot signal to the UE.
- the process by which the base station selects one of the m beams to transmit a pilot signal to the UE will be described in detail below.
- the base station selects an optimal beam from the m beams, wherein an uplink received power of the optimal beam among the m beams is the largest. Accordingly, in step 140, the base station can transmit a pilot signal to the UE through the optimal beam.
- the base station may select one of the m beams with the largest uplink received power as the optimal beam. For example, the base station can compare the average uplink received power of each of the m beams to select the optimal beam with the largest average received power. Then, the pilot signal is transmitted to the UE through the optimal beam. It can be seen that, in this embodiment, the base station transmits the pilot signal to the UE through one of the m beams, instead of transmitting the pilot signal through all the beams, thereby reducing the guide. The overhead of the frequency signal.
- the base station may send the first signaling to the UE, where the first signaling is used to indicate the pilot signal configuration corresponding to the optimal beam, The start time and the transmission period of the pilot signal are transmitted, and the pilot signal is configured to indicate the time-frequency resource occupied by the pilot signal.
- the base station may use different pilot signal configurations on each beam to transmit pilot signals.
- the pilot signal configuration indicates the time-frequency resource occupied by the pilot signal. Therefore, the pilot signals transmitted by the base station through the respective beams occupy different time-frequency resources.
- each subframe supports up to 20 CSI-RS configurations.
- m is greater than 20
- the base station can pass 24 subframes respectively.
- the beams transmit CSI-RS.
- the transmission period of the ⁇ pilot signal is 10 ms, and usually 1 subframe is 1 ms, that is, the transmission period of the pilot signal is 10 subframes.
- the pilot signal can be transmitted through 2 subframes in each cycle, and the subframes on which the pilot signals are transmitted can be subframes 1, 2, 11, 12, 21, and 22, and so on, and so on.
- the base station may send the CSI-RS through the 20 beams on the subframe 1, and transmit the CSI-RS through the remaining 4 beams on the subframe 2.
- the base station can transmit CSI-RS through 20 beams on subframe 11 and CSI-RS through 4 beams on subframe 12. And so on.
- the base station Before the base station sends the pilot signal to the UE, the base station needs to notify the UE of the time-frequency resource occupied by the pilot signal, the start time and the transmission period of the transmitted pilot signal. Specifically, the base station may indicate, by using the first signaling, the pilot signal configuration corresponding to the optimal beam, the start time and the transmission period of the transmitted pilot signal.
- the first signaling may be higher layer signaling. In this way, the UE may measure the pilot signal according to the transmission period from the start time on the time-frequency resource indicated by the pilot signal configuration.
- the base station may further receive first measurement information from the UE, where the first measurement information is that the UE measures the pilot signal according to the first signaling. get.
- the base station can then transmit data to the UE according to the first measurement information through the optimal beam.
- the base station may use the optimal beam as the data transmission beam corresponding to the UE, and send the data to the UE based on the first measurement information by using the optimal beam.
- the first measurement information may include a Channel Quality Indication (CQI).
- CQI Channel Quality Indication
- the first measurement information may include a CQI, and at least one of the following: a rank, a precoding matrix indicator (PMI).
- the UE may determine whether to include the rank or PMI in the measurement information according to the transmission mode.
- the base station selects one of the m beams to transmit a pilot signal to the UE.
- the base station may also select a plurality of beams from the m beams to transmit pilot signals to the UE, which will be described in detail below.
- the base station may determine, according to the uplink received power of each of the m beams, a sum of uplink received power of each group of the q groups of beams, where the q group of beams is For each of the m beam splits, each set of beams includes n beams.
- the base station may select a group of beams from the q group of beams such that the sum of the uplink received powers of the selected one of the q group beams is the largest.
- the base station may group m beams and divide them into q group beams, where each group of beams includes n beams.
- the base stations can be grouped according to the direction of the beams such that the spatial separation between the groups is sufficiently far apart.
- the spatial separation between groups can be determined according to actual needs, for example, based on transmission performance and overhead of pilot signals.
- the base station can calculate the sum of the uplink received power of each group of beams in the q group beam. For example, the base station can sum the average uplink received power of the n beams in each group of beams to obtain the sum of the uplink received power of each group of beams. The base station can compare the sum of the uplink received powers of the respective groups of beams, and select a group of beams with the largest sum of uplink received powers. It can be seen that the base station selects a group of beams from each group of beams to transmit a pilot signal to the UE instead of transmitting the pilot signal through all the beams, thereby saving the overhead of the pilot signal.
- the n beams in the selected group of beams are in one-to-one correspondence with the n pilot signal configurations, where the n pilot signal configurations are respectively used to indicate time-frequency resources occupied by the pilot signals.
- the base station may transmit a pilot signal to the UE according to n pilot signal configurations through n beams of the selected set of beams, respectively.
- the base station may send, by using n beams in the set of beams, n kinds of pilot signals to the UE on the time-frequency resources indicated by the n types of pilot signal configurations.
- the base station may send the second signaling to the UE before sending the pilot signal to the UE according to the n pilot signals configured by n beams in the selected group of beams, respectively.
- the second signaling may be used to indicate n kinds of pilot signal configurations, a start time and a transmission period of transmitting a pilot signal.
- the base station may use different pilot signal configurations on each beam to transmit pilot signals.
- the pilot signal configuration indicates the time-frequency resource occupied by the pilot signal. Therefore, the pilot signals transmitted by the base station through the respective beams occupy different time-frequency resources.
- each subframe supports up to 20 CSI-RS configurations.
- m is greater than 20
- the support divides 24 beams into 4 groups.
- the base station can transmit the CSI-RS through 4 sets of beams in 2 subframes respectively. For example, 4 sets the period for transmitting the pilot signal to 10 ms, that is, 10 subframes.
- the pilot signal can be transmitted through 2 subframes in each cycle.
- the subframes for transmitting the pilot signals may be subframes 1, 2, 11, 12, 21, and 22, and so on, and so on.
- the base station may transmit the CSI-RS through the first group and the second group beam on the subframe 1, and transmit the CSI through the third group and the fourth group beam on the subframe 2.
- the base station may transmit the CSI-RS through the first group and the second group beam on the subframe 11, and transmit the CSI-RS through the third group and the fourth group beam on the subframe 12. And so on.
- the base station Before transmitting the pilot signal, the base station needs to notify the UE of the time-frequency resources occupied by the various pilot signals, the starting time of transmitting the pilot signal, and the sending period. Specifically, the base station may indicate, to the UE, n types of pilot signal configurations, a start time, and a transmission period by using the second signaling. In this way, the UE can measure the pilot signal according to the transmission period from the start time on the time-frequency resources indicated by the n kinds of pilot signals.
- the second signaling may be higher layer signaling.
- the base station may receive the second measurement information from the UE after transmitting the pilot signal to the UE according to the n pilot signals configured by n beams in the selected group of beams.
- the second measurement information includes n measurement results obtained by the UE measuring the pilot signal on the time-frequency resources indicated by the n kinds of pilot signal configurations.
- the base station may determine, according to the selected group of beams and the second measurement information, a data transmission beam corresponding to the UE. The base station can then transmit data to the UE through the data transmission beam.
- the time-frequency resources indicated by the n kinds of pilot signal configurations are mutually offset, so that the UE can perform measurement on the time-frequency resources indicated by the n kinds of pilot signal configurations, and correspondingly obtain n measurement results.
- the base station may determine a spectral efficiency corresponding to n measurement results of >3 ⁇ 4 on the UE.
- the base station can determine the optimal measurement result among the n measurement results according to the spectral efficiency corresponding to the n measurement results, wherein the optimal measurement result corresponding to the n measurement results is the largest.
- the base station can then determine the data transmission beam based on the optimal measurement and the selected set of beams.
- each of the n measurement results may include
- each measurement may include a CQI, and at least one of the following: rank, PMI.
- the base station may calculate the spectral efficiency of each of the n measurement results reported by the UE according to the CQI and the rank. If the rank is not included in the measurement result, the base station can default the rank to rankl, thereby obtaining the spectral efficiency corresponding to each measurement result.
- the base station can select an optimal measurement result with the highest spectral efficiency from among the n measurement results. Since each measurement corresponds to a pilot signal configuration, and the pilot signal configuration is also corresponding to the beam, each measurement corresponds to one beam. When the optimal measurement result is determined, the beam corresponding to the optimal measurement result is determined as the data transmission beam in the selected one of the selected groups to transmit data to the UE.
- FIG. 2 is a schematic flow chart of a communication method according to another embodiment of the present invention. The method of Figure 2 is performed by the UE.
- n beams Receive a pilot signal that is sent by the base station by using n beams.
- the n beams are selected by the base station according to the uplink received power of each of the formed m beams, and m is a positive integer greater than 1.
- n is a positive integer, and n ⁇ m.
- the measurement complexity can be reduced.
- the base station transmits the pilot signal through n beams of the m beams, which can improve the flexibility of configuring the pilot signal for the UE.
- the pilot signal may be a CSI-RS.
- the UE may receive a pilot signal that is sent by the base station by using an optimal beam, where an uplink received power of the optimal beam is the largest among the m beams.
- the UE may receive the first signaling sent by the base station before receiving the pilot signal sent by the base station by using the optimal beam, where the first signaling is used to indicate the pilot signal corresponding to the optimal beam.
- the start time and the transmission period of the pilot signal are configured and transmitted, and the pilot signal is configured to indicate a time-frequency resource occupied by the pilot signal.
- the UE may perform measurement on the pilot signal according to the first signaling to obtain first measurement information.
- the UE may measure the pilot signal according to the transmission period from the start time on the time-frequency resource indicated by the pilot signal configuration corresponding to the optimal beam, thereby obtaining corresponding measurement information.
- the UE may send the first measurement information to the base station, and may receive the data that the base station transmits through the optimal beam and according to the first measurement information.
- the first measurement information may include a CQI.
- the first test The amount information may include a CQI, and at least one of the following: rank, PMI.
- the process of the UE receiving the pilot signal transmitted by the base station through one beam has been described above, and the corresponding measurement and reception of data are described.
- the process in which the UE receives the pilot signals transmitted by the base station through the plurality of beams will be described below, and the corresponding measurement and the process of receiving the data will be described.
- the UE may receive a pilot signal that is sent by the base station through n beams in a set of beams, where the set of beams is a q obtained by dividing the base station from m beams. Selected in the group beam, each group of beams includes n beams, and the sum of uplink received powers of a group of beams in the q group beam is the largest.
- the n beams in the set of beams are configured corresponding to the n pilot signals, and the pilot signals are configured to indicate time-frequency resources occupied by the pilot signals.
- the UE may receive pilot signals transmitted by the base station through n pilot beams in a set of beams according to n pilot configurations.
- the base station may send n kinds of pilot signals to the UE on the time-frequency resources indicated by the n types of pilot signal configurations by using n beams, respectively.
- the UE may receive the second signaling sent by the base station before the receiving base station configures the transmitted pilot signals according to the n pilot signals by using n beams in the set of beams, respectively.
- the signaling is used to indicate n kinds of pilot signal configurations, a start time and a transmission period for transmitting the pilot signal.
- the UE may measure the pilot signal according to the second signaling to obtain n measurement results.
- the UE may measure the pilot signal according to the transmission period from the start time on the time-frequency resources respectively indicated by the n types of pilot signal configurations.
- the UE may send second measurement information to the base station, where the second measurement information includes n measurement results, and may receive data sent by the base station through the data transmission beam, where the data transmission beam is a group according to a group. The beam and the second measurement information are determined.
- FIG. 3 is a schematic diagram of an example of a scenario in which an embodiment of the present invention is applicable.
- the base station can receive the uplink sounding signals of the UE through the 32 ports, and determine the average uplink receiving power of the beam 0 to the beam 15 according to the uplink sounding signals of the UE.
- the specific process can be referred to the process of the embodiment of Fig. 1.
- the base station can then compare the average uplink received power of beam 0 to beam 15 to select a beam with the largest average received power of the uplink as the beam for transmitting the pilot signal.
- the beam 2 will be described as an example.
- the base station may send high layer signaling to the UE before transmitting the pilot signal, and indicate to the UE the pilot signal configuration corresponding to the beam 2, the start time of transmitting the pilot signal, and the transmission period.
- the UE may measure the pilot signal according to the start time and the transmission period on the time-frequency resource indicated by the pilot signal corresponding to the beam 2, obtain measurement information, and send the measurement information to the base station.
- the base station can use the beam 2 as the data transmission beam corresponding to the UE, pass the beam 2, and send data to the UE according to the measurement information.
- the base station needs to transmit the pilot signal to the UE through 32 ports, which not only causes the base station to have poor flexibility in configuring the pilot signal for the UE, but also causes the UE to measure the pilot signal with high complexity.
- the base station may select one beam from the 16 beams to transmit the pilot signal, that is, select two ports from the 32 ports to transmit the pilot signal, thereby improving the flexibility of configuring the pilot signal for the UE. And can reduce the measurement complexity of the pilot signal to the UE.
- the existing pilot design scheme does not support port 32.
- the base station can select one beam from 16 beams to transmit a pilot signal, that is, select two ports from 32 ports to send.
- the pilot signal which can still follow the pilot pattern and codebook supported by the protocol, can realize the transmission of the pilot signal in the large-scale antenna system.
- FIG. 4 is a schematic diagram of another example of a scenario in which an embodiment of the present invention may be applied.
- each beam can correspond to 2 ports, then 16 beams correspond to 32 ports.
- the base station can divide 16 beams into 4 groups, and each 4 adjacent beams are a group. As shown in Figure 4 It can be shown that these four groups can be represented as group 0, group 1, group 2 and group 3.
- the base station can receive the uplink sounding signals of the UE through the 32 ports, and determine the average uplink receiving power of the beam 0 to the beam 15 according to the uplink sounding signals of the UE.
- the specific process can be referred to the process of the embodiment of Fig. 1.
- the base station can separately calculate the sum of the average uplink received powers of the beams of each group. For example, the average uplink received power of beam 0 to beam 3 is added to obtain the sum of the average uplink received power of group 0.
- the base station can compare the sum of the average uplink received powers of each of group 0 to group 3, select the largest group after the average uplink received power, and then transmit pilot signals to the UE through the respective beams in the group.
- the pilot signal configuration corresponding to each beam is different. That is, the configuration of the pilot signals corresponding to the respective beams in the group is different, and the configuration of the pilot signals corresponding to the groups is also different, that is, the configuration of the 16 pilot signals corresponding to the 16 beams. Therefore, beam 4 to beam 7 correspond to four pilot signal configurations, respectively. That is, the base station can transmit four kinds of pilot signals to the UE through the four pilot signal configurations through the beam 4 to the beam 7. It can also be understood that the base station sends four kinds of pilot signals to the UE through the eight ports in the group 2, and the two ports corresponding to each beam correspond to one pilot signal configuration.
- the base station Before transmitting the pilot signal, the base station may send high-level signaling to the UE, and indicate to the UE four types of pilot signal configurations corresponding to the beam 4 to the beam 7, the starting time of transmitting the pilot signal, and the sending period.
- the UE may measure the pilot signal according to the start time and the transmission period on the time-frequency resources respectively indicated by the four types of pilot signals.
- the time-frequency resources indicated by the four types of pilot signal configurations are not referred to as four measurement points, namely, measurement point 0, measurement point 1, measurement point 2, and measurement point 3.
- the measurement point 0 corresponds to the beam 4
- the measurement point 1 corresponds to the beam 5
- the measurement point 2 corresponds to the beam 6
- the measurement point 4 corresponds to the beam 7.
- the start time and the transmission period corresponding to each measurement point are also the same.
- the UE measures the four types of pilot signals transmitted by the beams 4 to 7 at four measurement points, and obtains four measurement results, which are reported to the base station.
- the base station can obtain the spectral efficiency corresponding to the four measurement results according to the four measurement results. Compare the spectral efficiencies corresponding to the four measurements and select the one with the highest spectral efficiency. And the beam corresponding to the selected measurement result can be determined. For example, if the measurement result obtained by the measurement point 1 is the highest, the beam corresponding to the measurement result is the beam 5. Then, The base station can transmit data to the UE using beam 5.
- the base station needs to transmit the pilot signal to the UE through 32 ports, which not only causes the base station to have poor flexibility in configuring the pilot signal for the UE, but also causes the UE to measure the pilot signal with high complexity.
- the base station may select a partial beam from the 16 beams to transmit the pilot signal, that is, select a part of the 32 ports to transmit the pilot signal, thereby improving the flexibility of configuring the pilot signal for the UE. And can reduce the measurement complexity of the pilot signal to the UE.
- the existing pilot design scheme does not support port 32.
- the base station can select one beam from 16 beams to transmit a pilot signal, that is, select two ports from 32 ports to send.
- the pilot signal which can still follow the pilot pattern and codebook supported by the protocol, can realize the transmission of the pilot signal in the large-scale antenna system.
- FIG. 5 is a schematic block diagram of a base station in accordance with one embodiment of the present invention.
- the base station 500 of FIG. 5 includes a weighting unit 510, a first determining unit 520, a selecting unit 530, and a transmitting unit 540.
- the weighting unit 510 forms m beams by means of antenna weighting, and m is a positive integer greater than one.
- the first determining unit 520 determines the uplink received power of each of the m beams according to the uplink sounding signal of the user equipment UE.
- the selecting unit 530 selects n beams from the m beams based on the uplink received power of each of the m beams, n is a positive integer, and n ⁇ m.
- the transmitting unit 540 transmits a pilot signal to the UE through n beams.
- the uplink received power of each of the m beams is determined according to the uplink sounding signal of the UE, and n beams are selected from the m beams according to the uplink received power of each of the m beams.
- the UE transmits the pilot signal instead of transmitting the pilot signal to the UE through all the beams, thereby improving the flexibility of configuring the pilot signal for the UE and reducing the measurement complexity of the pilot signal by the UE.
- the selecting unit 530 may select an optimal beam from the m beams, wherein an uplink received power of the optimal beam is the largest among the m beams.
- the transmitting unit 540 can transmit a pilot signal to the UE through the optimal beam.
- the sending unit 540 may further send the first signaling to the UE before sending the pilot signal to the UE by using the optimal beam, where the first signaling is used to indicate the pilot corresponding to the optimal beam.
- the signal configuration, the start time and the transmission period of the transmitted pilot signal, and the pilot signal is configured to indicate the time-frequency resource occupied by the pilot signal.
- the base station 500 may further include a first receiving unit 550.
- the receiving unit 550 receives the first measurement information from the UE, where the first measurement information is obtained by the UE according to the first signaling.
- the sending unit 540 can also send data to the UE according to the first measurement information by using an optimal beam.
- the first measurement information may include a CQI.
- the first measurement information may include a CQI, and at least one of the following: rank, PMI.
- the selecting unit 530 may determine, according to the uplink receiving power of each of the m beams, a sum of uplink receiving powers of each group of the q groups of beams, where the q group beams are m pairs. According to the beam splitting, each group of beams includes n beams, and then a group of beams can be selected from the q group beams, so that the sum of the uplink received powers of the selected one of the q group beams is the largest.
- the n beams in the selected group of beams may be in one-to-one correspondence with the n types of pilot signals, and the pilot signal configuration is used for the time-frequency resources occupied by the pilot signals, respectively.
- Transmitting unit 540 can transmit pilot signals to the UE according to n pilot signal configurations through n beams of the selected set of beams, respectively.
- the sending unit 540 may further send the second message to the UE before sending the pilot signal to the UE according to the n pilot signals configured by n beams in the selected group of beams.
- the second signaling is used to indicate n pilot signal configurations, a start time and a transmission period of the transmitted pilot signal.
- the base station 500 may further include: the second receiving unit 560 and the n beams in the first group of beams receive the second signal from the UE after transmitting the pilot signal to the UE according to the n kinds of pilot signal configurations.
- Measurement information includes n measurement results obtained by the UE on the pilot signal according to the second signaling.
- the second determining unit 570 can also determine the data transmission beam corresponding to the UE according to the selected set of beams and the second measurement information.
- the transmitting unit 540 can also transmit data to the UE through the data transmission beam.
- the second determining unit 570 may determine a spectral efficiency corresponding to each of the n measurement results, and determine an optimality among the n measurement results according to the spectral efficiency corresponding to the n measurement results respectively.
- the second determining unit 570 can then determine the data transmission beam based on the optimal measurement and the selected set of beams.
- each of the n measurement results may include a CQI.
- each measurement may include a CQI, and at least one of the following: rank, PMI.
- the pilot signal may be a CSI-RS.
- FIG. 6 is a schematic block diagram of a UE in accordance with one embodiment of the present invention.
- the UE 600 of FIG. 6 includes a receiving unit 610 and a measuring unit 620.
- the receiving unit 610 receives the pilot signals sent by the base station through the n beams, where the n beams are selected by the base station according to the uplink received power of each of the formed m beams, and m is a positive integer greater than 1. , n is a positive integer, and n ⁇ m.
- Measurement unit 620 measures the pilot signal.
- the measurement complexity can be reduced.
- the base station transmits the pilot signal through n beams of the m beams, which can improve the flexibility of configuring the pilot signal for the UE.
- the receiving unit 610 may receive a pilot signal that is sent by the base station by using an optimal beam, where an uplink received power of the optimal beam is the largest among the m beams.
- the receiving unit 610 may further receive the first signaling sent by the base station, where the first signaling is used to indicate the optimal beam corresponding to the pilot signal that is sent by the base station by using the optimal beam.
- the pilot signal is configured, the start time of the transmitted pilot signal, and the transmission period, and the pilot signal is configured to indicate the time-frequency resource occupied by the pilot signal.
- the measuring unit 620 can measure the pilot signal according to the first signaling to obtain the first measurement information.
- the UE 600 may further include a sending unit 630.
- the transmitting unit 630 can transmit the first measurement information to the base station.
- the receiving unit 610 can also receive data that the base station transmits through the optimal beam and according to the first measurement information.
- the first measurement information may include a CQI.
- the first measurement information may include a CQI, and at least one of the following: rank, PMI.
- the receiving unit 610 may receive a pilot signal that is sent by the base station through n beams in a set of beams, where the group of beams is selected by the base station from the q groups of beams obtained by dividing m beams.
- Each group of beams includes n beams, and the sum of uplink received powers of a group of beams in the q group beam is the largest.
- the pilot signal is configured to indicate the time-frequency resource occupied by the pilot signal.
- the receiving unit 610 can receive a pilot signal that is sent by the base station according to n pilot configurations by n beams in a set of beams.
- the receiving unit 610 may further receive the second signaling sent by the base station before the receiving base station separately transmits the pilot signals sent by the n pilot beams in the set of beams according to the n pilot configurations.
- the second signaling is used to indicate n kinds of pilot signal configurations, a start time and a transmission period of transmitting a pilot signal;
- the measuring unit 620 can measure the pilot signal according to the second signaling to obtain n measurement results.
- the sending unit 630 may send second measurement information to the base station, where the second measurement information includes n measurement results.
- the receiving unit 610 can also receive data sent by the base station through the data transmission beam, where the data transmission beam is determined by the base station according to the group of beams and the second measurement information.
- each of the n measurement results may include a CQI.
- each measurement may include a CQI, and at least one of the following: rank, PMI.
- the pilot signal may be a CSI-RS.
- FIG. 7 is a schematic block diagram of a base station according to another embodiment of the present invention.
- the base station 700 of FIG. 7 includes a processor 710 and a transmitter 720.
- the processor 710 forms m beams by means of antenna weighting, and m is a positive integer greater than one.
- the processor 710 also determines an uplink received power of each of the m beams based on the uplink sounding signal of the user equipment UE.
- the processor 710 also selects n beams from the m beams based on the uplink received power of each of the m beams, n being a positive integer, and n ⁇ m.
- Transmitter 720 transmits pilot signals to the UE through n beams.
- the uplink received power of each of the m beams is determined according to the uplink sounding signal of the UE, and n beams are selected from the m beams according to the uplink received power of each of the m beams.
- the UE transmits the pilot signal instead of transmitting the pilot signal to the UE through all the beams, thereby improving the flexibility of configuring the pilot signal for the UE and reducing the measurement complexity of the pilot signal by the UE.
- the processor 710 may select an optimal beam from the m beams. Among them, the optimal received uplink power of the optimal beam is the largest among the m beams.
- the transmitter 720 can transmit a pilot signal to the UE through an optimal beam.
- the transmitter 720 may further send the first signaling to the UE before transmitting the pilot signal to the UE by using the optimal beam, where the first signaling is used to indicate the pilot corresponding to the optimal beam.
- the signal configuration, the start time and the transmission period of the transmitted pilot signal, and the pilot signal is configured to indicate the time-frequency resource occupied by the pilot signal.
- the base station 700 may further include a receiver 730.
- the receiver 730 receives the first measurement information from the UE after the transmitter 720 transmits the pilot signal to the UE through the optimal beam, where the first measurement information is obtained by the UE according to the first signaling.
- the transmitter 720 can also transmit data to the UE according to the first measurement information through the optimal beam.
- the first measurement information may include a CQI.
- the first measurement information may include a CQI, and at least one of the following: rank, PMI.
- the processor 710 may determine, according to the uplink received power of each of the m beams, a sum of uplink received power of each group of the q groups of beams, where the q groups of beams are m pairs. According to the beam splitting, each group of beams includes n beams, and then a group of beams can be selected from the q group beams, so that the sum of the uplink received powers of the selected one of the q group beams is the largest.
- the n beams in the selected group of beams may be in one-to-one correspondence with the n types of pilot signals, and the pilot signal configuration is used for the time-frequency resources occupied by the pilot signals, respectively.
- Transmitter 720 can transmit pilot signals to the UE via n pilot beams in a selected set of beams, respectively.
- the transmitter 720 may further send the second message to the UE before sending the pilot signal to the UE according to the n pilot beams in the selected one of the set of beams.
- the second signaling is used to indicate n pilot signal configurations, a start time and a transmission period of the transmitted pilot signal.
- the receiver 730 may receive the first signal from the UE after the transmitter 720 transmits the pilot signal to the UE according to the n pilot signals configured by the n beams in the selected group of beams.
- the second measurement information includes the n measurement results obtained by the UE on the pilot signal according to the second signaling.
- the processor 710 is further configured to determine, according to the selected set of beams and the second measurement information, a data transmission beam corresponding to the UE.
- Transmitter 720 can also transmit data to the UE through the data transmission beam.
- the processor 710 may determine spectral efficiencies corresponding to the n measurement results respectively, and determine an optimal measurement result among the n measurement results according to the spectral efficiencies corresponding to the n measurement results respectively. Among them, the optimal measurement result corresponding to the n measurement results is the largest. Processor 710 can then determine the data transmission beam based on the optimal measurement and the selected set of beams.
- each of the n measurement results may include a CQI.
- each measurement may include a CQI, and at least one of the following: rank, PMI.
- the pilot signal may be a CSI-RS.
- FIG. 8 is a schematic block diagram of a UE according to another embodiment of the present invention.
- the UE 800 of FIG. 8 includes a receiver 810 and a processor 820.
- the receiver 810 receives the pilot signals sent by the base station through the n beams, and the n beams are selected by the base station according to the uplink received power of each of the formed m beams, and m is a positive integer greater than 1. , n is a positive integer, and n ⁇ m.
- Processor 820 measures the pilot signals.
- the measurement complexity can be reduced.
- the base station transmits the pilot signal through n beams of the m beams, which can improve the flexibility of configuring the pilot signal for the UE.
- the receiver 810 may receive a pilot signal that is sent by the base station by using an optimal beam, where an uplink received power of the optimal beam is the largest among the m beams.
- the receiver 810 may further receive the first signaling sent by the base station before receiving the pilot signal sent by the base station by using the optimal beam, where the first signaling is used to indicate that the optimal beam corresponds to
- the pilot signal is configured, the start time of the transmitted pilot signal, and the transmission period, and the pilot signal is configured to indicate the time-frequency resource occupied by the pilot signal.
- the processor 820 can measure the pilot signal according to the first signaling to obtain the first measurement information.
- the UE 800 may further include a transmitter 830.
- Transmitter 830 can transmit the first measurement information to the base station.
- the receiver 810 can also receive data transmitted by the base station through the optimal beam and transmitted according to the first measurement information.
- the first measurement information may include a CQI.
- the first measurement information may include a CQI, and at least one of the following: rank, PMI.
- the receiver 810 can receive the base station to pass a group of beams respectively.
- a pilot signal transmitted by n beams a group of beams selected by a base station from q beam beams obtained by m beam splitting, each group of beams including n beams, and uplink reception of a group of beams in q group beams The sum of power is the largest.
- the n beams in the set of beams are in one-to-one correspondence with the n pilot signal configurations, and the pilot signals are configured to indicate time-frequency resources occupied by the pilot signals.
- the receiver 810 can receive pilot signals transmitted by the base station according to n pilot configurations by n beams in a set of beams.
- the receiver 810 may further receive the second signaling sent by the base station before the receiving base station separately transmits the pilot signals sent by the n beams in the set of beams according to the n pilot configurations.
- the second signaling is used to indicate n kinds of pilot signal configurations, a start time and a transmission period of transmitting a pilot signal;
- the receiver 810 can measure the pilot signal according to the second signaling to obtain n measurement results.
- the receiver 810 may send second measurement information to the base station, where the second measurement information includes n measurement results.
- the receiver 810 can also receive data transmitted by the base station through the data transmission beam, and the data transmission beam is determined by the base station according to the set of beams and the second measurement information.
- each of the n measurement results may include a CQI.
- each measurement may include a CQI, and at least one of the following: rank, PMI.
- the pilot signal may be a CSI-RS.
- the disclosed systems, devices, and The method can be implemented in other ways.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
- the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
- each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
- the technical solution of the present invention which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including
- the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
- the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .
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Abstract
Description
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Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13894379.0A EP3046269B1 (en) | 2013-09-27 | 2013-09-27 | Communication method, base station and user equipment |
| JP2016517546A JP6306692B2 (ja) | 2013-09-27 | 2013-09-27 | 通信方法、基地局およびユーザ機器 |
| CN201380001714.8A CN103688474B (zh) | 2013-09-27 | 2013-09-27 | 通信方法、基站和用户设备 |
| PCT/CN2013/084423 WO2015042855A1 (zh) | 2013-09-27 | 2013-09-27 | 通信方法、基站和用户设备 |
| US15/081,038 US10009083B2 (en) | 2013-09-27 | 2016-03-25 | Communication method, base station, and user equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/084423 WO2015042855A1 (zh) | 2013-09-27 | 2013-09-27 | 通信方法、基站和用户设备 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US15/081,038 Continuation US10009083B2 (en) | 2013-09-27 | 2016-03-25 | Communication method, base station, and user equipment |
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| Publication Number | Publication Date |
|---|---|
| WO2015042855A1 true WO2015042855A1 (zh) | 2015-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2013/084423 Ceased WO2015042855A1 (zh) | 2013-09-27 | 2013-09-27 | 通信方法、基站和用户设备 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US10009083B2 (zh) |
| EP (1) | EP3046269B1 (zh) |
| JP (1) | JP6306692B2 (zh) |
| CN (1) | CN103688474B (zh) |
| WO (1) | WO2015042855A1 (zh) |
Cited By (1)
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| EP3046269A1 (en) | 2016-07-20 |
| CN103688474B (zh) | 2018-06-05 |
| EP3046269A4 (en) | 2016-08-10 |
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| CN103688474A (zh) | 2014-03-26 |
| JP6306692B2 (ja) | 2018-04-04 |
| JP2016539525A (ja) | 2016-12-15 |
| US20160211899A1 (en) | 2016-07-21 |
| EP3046269B1 (en) | 2018-09-19 |
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