CN108988915B - Channel measurement method, channel measurement device and base station - Google Patents

Channel measurement method, channel measurement device and base station Download PDF

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CN108988915B
CN108988915B CN201710403151.5A CN201710403151A CN108988915B CN 108988915 B CN108988915 B CN 108988915B CN 201710403151 A CN201710403151 A CN 201710403151A CN 108988915 B CN108988915 B CN 108988915B
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beam forming
pilot signal
sector
base station
terminal
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CN108988915A (en
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李萍
王晓妮
姜静
于泳
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ZTE Corp
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ZTE Corp
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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
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • 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
    • 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
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for 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

Abstract

The invention provides a channel measuring method, a channel measuring device and a base station, which relate to the technical field of communication, and the method comprises the following steps: transmitting a first pilot signal to a terminal; receiving index information of a beam or a sector with the maximum energy selected according to the first pilot signal, which is sent by the terminal; transmitting a second pilot signal to the terminal through the beam or the sector with the largest energy; and receiving the digital beam forming weight value sent by the terminal after receiving the second pilot signal. The embodiment of the invention can reduce the signaling interaction overhead between the terminal and the base station.

Description

Channel measurement method, channel measurement device and base station
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a channel measurement method, a channel measurement apparatus, and a base station.
Background
With the development of mobile communication technology, millimeter wave communication is an important approach for expanding the spectrum of 5th-Generation (5G) wireless communication systems, and the millimeter wave communication predicts that the available frequency band is a new frequency band such as 28 ghz, 38 ghz, 57-64 ghz, or 71-76 ghz, and the total bandwidth released is greater than 100 ghz. In order to overcome the large path loss of millimeter wave communication, a large-scale Multiple-Input Multiple-Output (MIMO) becomes an indispensable important technology of a millimeter wave system, and the millimeter wave large-scale MIMO cellular system mainly works in a hot spot area, has a maximum coverage radius of about 100 meters, and provides a high-speed and good-experience data service transmission for mobile users. In the hot spot area it covers, its active users will reach tens or even hundreds of users. In the prior art, for hybrid beam forming, a base station needs to transmit a plurality of pilot signals to a terminal more densely and aperiodically, so that the terminal needs to measure an analog beam forming weight according to the pilot signals, measure a plurality of digital beam forming weights according to the pilot signals, and select a more accurate digital beam forming weight, and finally the base station receives the more accurate digital beam forming weight transmitted by the terminal.
Disclosure of Invention
The embodiment of the invention aims to provide a channel measuring method, a channel measuring device and a base station, and solves the problem that the overhead of signaling interaction between the current terminal and the base station is too high.
In order to achieve the above object, an embodiment of the present invention provides a method for channel measurement, including:
transmitting a first pilot signal to a terminal;
receiving index information of a beam or a sector with the maximum energy selected according to the first pilot signal, which is sent by the terminal;
transmitting a second pilot signal to the terminal through the beam or the sector with the largest energy;
and receiving the digital beam forming weight value sent by the terminal after receiving the second pilot signal.
The embodiment of the invention also provides a channel measurement method, which comprises the following steps:
receiving a first pilot signal sent by a base station, wherein the first pilot signal is used for measuring and selecting a beam or a sector with the largest energy in a millimeter wave communication prediction available frequency band;
transmitting index information of the beam or sector with the maximum energy to the base station;
receiving a second pilot signal transmitted by the base station through the beam or the sector with the largest energy;
and sending a digital beam forming weight to the base station, wherein the digital beam forming weight is obtained by estimating an analog beam forming channel according to the second pilot signal and calculating according to the analog beam forming channel.
An embodiment of the present invention further provides a channel measurement apparatus, including:
a first sending module, configured to send a first pilot signal to a terminal;
a first receiving module, configured to receive index information of a beam or a sector with the largest energy selected according to the first pilot signal, where the beam or the sector is sent by the terminal;
a second transmitting module, configured to transmit a second pilot signal to the terminal through the beam or sector with the largest energy;
and the second receiving module is used for receiving the digital beam forming weight value sent by the terminal after receiving the second pilot signal.
An embodiment of the present invention further provides a channel measurement apparatus, including:
a third receiving module, configured to receive a first pilot signal sent by a base station, where the first pilot signal is used to measure and select a beam or a sector with the largest energy in an available frequency band for millimeter wave communication prediction;
a third sending module, configured to send index information of the beam or sector with the largest energy to the base station;
a fourth receiving module, configured to receive a second pilot signal sent by the base station through the beam or sector with the largest energy;
and a fourth sending module, configured to send a digital beamforming weight to the base station, where the digital beamforming weight is obtained by estimating an analog beamforming channel according to the second pilot signal and calculating according to the analog beamforming channel.
An embodiment of the present invention further provides a computer storage medium, in which one or more programs executable by a computer are stored, and when the one or more programs are executed by the computer, the computer is enabled to execute a channel measurement method as provided above.
One of the above technical solutions has the following advantages or beneficial effects:
compared with the prior art that a plurality of pilot signals are required to be transmitted densely to measure the analog beam forming weight and the digital beam forming weight, the embodiment of the invention can firstly transmit the first pilot signal, and then the terminal selects the beam or the sector with the maximum energy according to the first pilot signal, and then transmits the second pilot signal through the beam or the sector with the maximum energy, so that the second pilot signal of the terminal is calculated to obtain the digital beam forming weight, thereby reducing the signaling interaction overhead between the terminal and the base station required by measuring the digital beam forming weight in the prior art, and further reducing the signaling interaction overhead between the terminal and the base station.
Drawings
Fig. 1 is a schematic flow chart of a channel measurement method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of another channel measurement method according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating another channel measurement method according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating another channel measurement method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a channel measurement apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another channel measurement apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another channel measurement apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another channel measurement apparatus according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention can be applied to a millimeter wave large-scale MIMO cellular system. The millimeter wave massive MIMO cellular system mainly works in a hot spot area, and active user terminals can reach dozens or even hundreds in the hot spot area covered by the millimeter wave massive MIMO cellular system. The channel measurement method provided by the embodiment of the invention can be used for more conveniently obtaining the analog beam forming weight and the digital beam forming weight in the mixed beam forming, and simultaneously reducing the signaling interaction overhead between the terminal and the base station.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a channel measurement method, including the following steps:
step S101, sending a first pilot signal to a terminal;
step S102, receiving index information of the beam or sector with the maximum energy selected according to the first pilot signal, which is sent by the terminal;
step S103, sending a second pilot signal to the terminal through the beam or the sector with the maximum energy;
and step S104, receiving the digital beam forming weight value sent by the terminal after receiving the second pilot signal.
The periodicity of the sending of the first pilot signal to the terminal may be 5 milliseconds, 10 milliseconds, or 20 milliseconds, where a specific value of the cycle time is not limited, and a time as long as possible may be selected for the cycle time of sending the first pilot signal. In the hybrid beamforming design, the weights of the analog beamforming are the same over the entire bandwidth, and the analog beamforming weights are calculated based on the beam direction information of the user, which is slowly varying channel information. On the other hand, due to the large bandwidth of millimeter waves and the existence of multipath in the propagation environment, millimeter wave wireless channels still have frequency selective fading characteristics. The digital beam forming weights of the sub-bands in different frequency domains are different, the digital baseband processing is more flexible than the analog beam forming, more precise channel information measurement and feedback are needed, and the measurement period and the feedback period are shorter. In summary, the measurement and feedback of analog beamforming only needs one feedback value over the whole bandwidth, and the measurement period can be longer; while digital beamforming measurements and feedback require multiple measurements over the entire bandwidth, finer channel state information measurements and feedback require shorter measurement periods.
The usable frequency range for millimeter wave communication prediction is a new frequency range such as 28 ghz, 38 ghz, 57-64 ghz, or 71-76 ghz, and the specific numerical value of the usable frequency range for millimeter wave communication prediction is not limited herein.
Wherein, the transmission of the second pilot signal to the terminal can select a non-periodic transmission mode, and the transmission of the second pilot signal is more intensive than the transmission of the first pilot signal.
Wherein, the index information i of the beam or sector with the maximum energy, and the index information of the beam or sector with the maximum energy are the forming weight F for the analog beamiThe digital beam forming weight W obtained after roundingkEstimating an analog beamforming channel HF for said terminal from said second pilot signaliForming channels HF from said analog beamsiCalculating to obtain the digital beam forming weight WkThe formula adopted is Wk＝eig(HFi) The digital beam forming weight is the eigenvector corresponding to the maximum eigenvalue after the eigenvalue of the analog beam forming channel is decomposed; or by using
Figure BDA0001310231260000051
Then W isk＝VkWhere H is the channel matrix between the base station and the terminal, i.e. in the above formula, VkRepresenting the digital beamforming weights.
In the embodiment of the invention, the first pilot signal can be sent firstly, the terminal selects the beam or the sector with the largest energy according to the first pilot signal, then the second pilot signal is sent through the beam or the sector with the largest energy, the second pilot signal of the terminal is calculated to obtain the digital beam forming weight, and the second pilot signal of the terminal is calculated to obtain the digital beam forming weight, so that the signaling interaction overhead between the terminal and the base station required for measuring the digital beam forming weight in the prior art is reduced, and the signaling interaction overhead between the terminal and the base station is reduced. In addition, the accuracy of channel measurement can be improved through the returned beam or sector with the maximum energy and the information of the digital beam forming weight obtained through calculation.
Example 2
As shown in fig. 2, another channel measurement method provided in the embodiment of the present invention includes:
step S201, sending a first pilot signal to a terminal;
step S202, receiving index information of the beam or sector with the maximum energy selected according to the first pilot signal, which is sent by the terminal;
step S203, sending a Radio Resource Control (RRC) signaling to the terminal, where the RRC signaling includes an antenna port number of a target antenna port for sending the second pilot signal and a preset time;
step S204, in the preset time, a second pilot signal is sent to the terminal through the beam or the sector with the maximum energy by using the target antenna port;
step S205, receiving the digital beam forming weight sent by the terminal after receiving the second pilot signal.
And sending RRC signaling to the terminal, wherein the RRC signaling also comprises a sending period of the semi-static configured first pilot signal of the base station and information of a sending beam. The transmission pattern of the second pilot Signal uses the pattern of the Channel state Information measurement pilot (CSI-RS) in the third Generation Partnership Project (3 GPP) TS 36.211C 20 and the antenna port used.
When the first pilot signal is transmitted, different pilot sequences are defined for different sectors or coarse beams by adopting a pattern of a certain antenna port of a CSI-RS in 3GPP TS 36.211C 20, and the pilot sequences corresponding to each sector are orthogonal. The first pilot signal of the antenna port transmits I sector beams through a plurality of radio frequency channels, according to the pilot sequence in 3GPP TS 36.211C 20, as defined below:
Figure BDA0001310231260000061
wherein n issBeing wirelessThe number of slots of a frame, l is the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols of the slot, and C (i) is generated as defined in 7.2 of 3GPP TS 36.211C 20.
And then, the terminal measures the wave beam or the sector with the maximum energy according to the received first pilot signal, solves the spread spectrum information of the pilot sequence of the wave beam or the sector with the maximum energy, and sends the index information of the wave beam or the sector with the maximum energy to the base station.
Or, the base station may set multiple antenna arrays, there are multiple sectors in the pattern of the antenna port 15 of the CSI-RS in 3GPP TS 36.211C 20, when the first pilot signal is sent, different analog beams corresponding to different sector beams may be used to form weight sending, and the terminal measures the sector beam with the largest energy in the different sector beams according to the sequence of the received pilot signals, and feeds back the information of the sector beam to the base station. The information of the sector beam includes index information of the sector beam and corresponding analog beam forming weight.
In this embodiment of the present invention, the transmission patterns of the first pilot signal and the second pilot signal may not be the same as the CSI-RS transmission pattern in 3GPP TS 36.211C 20, and a new pilot transmission pattern may be determined according to the specific measurement requirement of hybrid beamforming.
In the embodiment of the invention, the RRC signaling is sent to the terminal in advance to inform the terminal of the preset time for sending the second pilot signal and the antenna port number, after the terminal is ready to receive the second pilot signal, the second pilot signal passes through the wave beam or the sector with the largest energy, and the second pilot signal is sent to the terminal by using the antenna port which is selected in advance.
Optionally, after step S205, the method may further include the following steps:
and sending data signals through beams corresponding to the digital beam forming weights and beams corresponding to analog beam forming weights, wherein the analog beam forming weights are analog beam forming weights pointed by the beams or the sectors with the maximum energy.
Optionally, in this embodiment, the method may further include the following steps:
receiving a fine analog beam forming weight value of a fine analog beam direction obtained by the terminal according to the measurement of a second pilot signal;
and transmitting data signals through the beams corresponding to the digital beam forming weights and the beams corresponding to the fine analog beam forming weights.
In this embodiment, on the basis of the beam or sector with the largest energy measured in step S201, a finer beam or sector may be measured and selected from the beam or sector with the largest energy according to the second pilot signal, the fine analog beamforming weight is the fine analog beamforming weight pointed by the finer beam or sector, and the data signal is transmitted through the beam corresponding to the fine analog beamforming weight and the beam corresponding to the digital beamforming weight, so that the accuracy of channel measurement may be higher, and the quality of the transmitted data signal may be better.
In the embodiment of the present invention, the beam corresponding to the digital beam forming weight and the beam corresponding to the analog beam forming weight selected in the above steps are used to transmit a data signal, so as to ensure the quality of data signal transmission to the greatest extent, wherein the index information of the beam or sector with the greatest energy is obtained by rounding the analog beam forming weight, and the index information of the beam or sector with the greatest energy can directly point to the analog beam or sector with the greatest energy, and the digital beam forming weight and the beam corresponding to the digital beam forming weight are the same as the beam corresponding to the analog beam forming weight.
Optionally, after step S205, the method may further include the following steps:
receiving Channel Quality Indicator (CQI) corresponding to the digital beamforming weight and a CQI corresponding to an analog beamforming weight, where the analog beamforming weight is an analog beamforming weight pointed by the beam or the sector with the largest energy.
In the embodiment of the invention, by receiving the CQI corresponding to the digital beam forming weight and the CQI corresponding to the analog beam forming weight, a very clear judgment standard can be provided for the quality of the channel corresponding to the digital beam forming weight and the channel corresponding to the analog beam forming weight.
Example 3
As shown in fig. 3, an embodiment of the present invention provides a channel measurement method, including the following steps:
step S301, receiving a first pilot signal sent by a base station, wherein the first pilot signal is used for measuring and selecting a beam or a sector with the largest energy in a millimeter wave communication prediction available frequency band;
step S302, sending the index information of the beam or the sector with the maximum energy to the base station;
step S303, receiving a second pilot signal sent by the base station through the beam or the sector with the largest energy;
step S304, sending a digital beam forming weight to the base station, wherein the digital beam forming weight is obtained by estimating an analog beam forming channel according to the second pilot signal and calculating according to the analog beam forming channel.
The implementation of the above steps can refer to the related descriptions of steps S101 to S104 in the embodiment shown in fig. 1, and are not described herein again.
In the embodiment of the invention, the terminal selects the beam or the sector with the largest energy according to the first pilot signal, then receives the second pilot signal sent by the base station through the beam or the sector with the largest energy, and calculates and obtains the digital beam forming weight according to the second pilot signal, so that the signaling interaction overhead between the terminal and the base station required for measuring the digital beam forming weight in the prior art is reduced, and the signaling interaction overhead between the terminal and the base station is reduced. In addition, the accuracy of channel measurement can be improved through the returned beam or sector with the maximum energy and the information of the digital beam forming weight obtained through calculation.
Example 4
As shown in fig. 4, an embodiment of the present invention provides a channel measurement method, including the following steps:
step S401, receiving a first pilot signal sent by a base station, wherein the first pilot signal is used for measuring and selecting a beam or a sector with the largest energy in a millimeter wave communication prediction available frequency band;
step S402, transmitting the index information of the beam or the sector with the maximum energy to the base station;
step S403, receiving RRC signaling sent by the base station;
step S404, receiving a second pilot signal sent by the base station through the beam or sector with the largest energy;
step S405, sending a digital beam forming weight to the base station, wherein the digital beam forming weight is obtained by estimating an analog beam forming channel according to the second pilot signal and calculating according to the analog beam forming channel.
The embodiment of the invention can enable the terminal to receive the RRC signaling sent by the base station, can compare the second pilot frequency information sent subsequently, and judges whether the second pilot frequency information is sent in the antenna port number of the target antenna port and the preset time included in the RRC signaling. An identification function is performed on the second pilot signal.
Example 5
As shown in fig. 5, an embodiment of the present invention provides a channel measurement apparatus 500, which includes:
a first sending module 501, configured to send a first pilot signal to a terminal;
a first receiving module 502, configured to receive index information of a beam or a sector with the largest energy selected according to the first pilot signal, where the beam or the sector is sent by the terminal;
a second sending module 503, configured to send a second pilot signal to the terminal through the beam or sector with the largest energy;
a second receiving module 504, configured to receive a digital beam forming weight 5 sent by the terminal after receiving the second pilot signal.
Optionally, as shown in fig. 6, the channel measuring apparatus 500 may further include:
a data signal sending module 505, configured to send a data signal through a beam corresponding to the digital beamforming weight and a beam corresponding to an analog beamforming weight, where the analog beamforming weight is an analog beamforming weight pointed by the beam or the sector with the largest energy.
The channel measurement apparatus 500 can implement each process of performing channel measurement in the method embodiments provided in fig. 1 to fig. 2, and is not described herein again to avoid repetition. The channel measuring device can reduce the signaling interaction overhead between the terminal and the base station and can also improve the accuracy of channel measurement.
Example 6
As shown in fig. 7, an embodiment of the present invention provides a channel measurement apparatus 700, including:
a third receiving module 701, configured to receive a first pilot signal sent by a base station, where the first pilot signal is used to measure and select a beam or a sector with the largest energy in an available frequency band for millimeter wave communication prediction;
a third sending module 702, configured to send index information of the beam or sector with the largest energy to the base station;
a fourth receiving module 703, configured to receive a second pilot signal sent by the base station through the beam or sector with the largest energy;
a fourth sending module 704, configured to send a digital beamforming weight to the base station, where the digital beamforming weight is obtained by estimating an analog beamforming channel according to the second pilot signal and calculating according to the analog beamforming channel.
Optionally, as shown in fig. 8, the channel measuring apparatus 700 may further include:
a data signal receiving module 705, configured to receive a data signal sent by the base station through a beam corresponding to the digital beam forming weight and a beam corresponding to an analog beam forming weight, where the analog beam forming weight is an analog beam forming weight pointed by the beam or the sector with the largest energy.
The channel measurement apparatus 700 can implement each process of performing channel measurement in the method embodiments provided in fig. 3 to fig. 4, and is not described herein again to avoid repetition. The channel measuring device can reduce the signaling interaction overhead between the terminal and the base station and can also improve the accuracy of channel measurement.
Example 7
As shown in fig. 9, fig. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention, where the base station includes: a processor 901, memory 902, network interface 804, and user interface 903. The various components in the character model configuration apparatus 800 are coupled together by a bus system 905. It is understood that the bus system 905 is used to enable communications among the components. The bus system 905 includes a power bus, a control bus, and a status signal bus, in addition to a data bus. For clarity of illustration, however, the various buses are labeled in fig. 9 as bus system 905.
The user interface 903 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.
It is to be understood that the memory 902 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 802 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
In some embodiments, memory 902 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 9021 and application programs 9022.
The operating system 9021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is configured to implement various basic services and process hardware-based tasks. The application 9022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. A program implementing the method of an embodiment of the present invention may be included in application 9022.
In the embodiment of the present invention, by calling a program or an instruction stored in the memory 902, specifically, a program or an instruction stored in the application 9022, the processor 901 is configured to:
transmitting a first pilot signal to a terminal;
receiving index information of a beam or a sector with the maximum energy selected according to the first pilot signal, which is sent by the terminal;
transmitting a second pilot signal to the terminal through the beam or the sector with the largest energy;
and receiving the digital beam forming weight value sent by the terminal after receiving the second pilot signal.
The method disclosed in the above embodiments of the present invention may be applied to the processor 901, or implemented by the processor 901. The processor 901 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 901. The Processor 901 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the above method in combination with the hardware thereof.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
Optionally, before sending the second pilot signal to the terminal through the beam or the sector with the largest energy, the method further includes: sending RRC signaling to the terminal, wherein the RRC signaling comprises an antenna port number of a target antenna port for sending a second pilot signal and preset time;
before transmitting a second pilot signal to the terminal through the beam or sector with the largest energy, the method includes:
and at the preset time, transmitting a second pilot signal to the terminal by the beam or the sector with the maximum energy and by using the target antenna port.
Optionally, after receiving the digital beamforming weight sent by the terminal, the method further includes:
and sending data signals through beams corresponding to the digital beam forming weights and beams corresponding to analog beam forming weights, wherein the analog beam forming weights are analog beam forming weights pointed by the beams or the sectors with the maximum energy.
Optionally, before sending the data signal through the beam corresponding to the digital beam forming weight and the beam corresponding to the analog beam forming weight, the method further includes:
receiving a fine analog beam forming weight value of a fine analog beam direction obtained by the terminal according to the measurement of a second pilot signal;
the sending of the data signal by the beam corresponding to the digital beam forming weight and the beam corresponding to the analog beam forming weight includes:
and transmitting data signals through the beams corresponding to the digital beam forming weights and the beams corresponding to the fine analog beam forming weights.
It should be noted that, in this embodiment, the base station may implement any implementation manner in the method embodiments of the present invention, and achieve the same beneficial effects, and details are not described here.
It will be understood by those skilled in the art that all or part of the steps of the method for implementing the above embodiments may be implemented by hardware associated with program instructions, and the program may be stored in a computer readable medium, and when executed, the program includes the following steps:
transmitting a first pilot signal to a terminal;
receiving index information of a beam or a sector with the maximum energy selected according to the first pilot signal, which is sent by the terminal;
transmitting a second pilot signal to the terminal through the beam or the sector with the largest energy;
and receiving the digital beam forming weight value sent by the terminal after receiving the second pilot signal.
Optionally, the program further includes, when executed: sending RRC signaling to the terminal, wherein the RRC signaling comprises an antenna port number of a target antenna port for sending a second pilot signal and preset time;
the sending a second pilot signal to the terminal through the beam or sector with the largest energy includes:
and at the preset time, transmitting a second pilot signal to the terminal by the beam or the sector with the maximum energy and by using the target antenna port.
Optionally, the program further includes, when executed:
and sending data signals through beams corresponding to the digital beam forming weights and beams corresponding to analog beam forming weights, wherein the analog beam forming weights are analog beam forming weights pointed by the beams or the sectors with the maximum energy.
Optionally, the program further includes, when executed:
receiving a fine analog beam forming weight value of a fine analog beam direction obtained by the terminal according to the measurement of a second pilot signal;
the sending of the data signal by the beam corresponding to the digital beam forming weight and the beam corresponding to the analog beam forming weight includes:
and transmitting data signals through the beams corresponding to the digital beam forming weights and the beams corresponding to the fine analog beam forming weights.
The method can also comprise the following steps:
receiving a first pilot signal sent by a base station, wherein the first pilot signal is used for measuring and selecting a beam or a sector with the largest energy in a millimeter wave communication prediction available frequency band;
transmitting index information of the beam or sector with the maximum energy to the base station;
receiving a second pilot signal transmitted by the base station through the beam or the sector with the largest energy;
and sending a digital beam forming weight to the base station, wherein the digital beam forming weight is obtained by estimating an analog beam forming channel according to the second pilot signal and calculating according to the analog beam forming channel.
Optionally, the program further includes, when executed:
and receiving RRC signaling sent by the base station.
Optionally, the program further includes, when executed:
and receiving a data signal sent by the base station through a beam corresponding to the digital beam forming weight and a beam corresponding to an analog beam forming weight, wherein the analog beam forming weight is the analog beam forming weight pointed by the beam or the sector with the maximum energy.
Optionally, the program further includes, when executed:
sending a fine analog beam forming weight to the base station, wherein the fine analog beam forming weight is a fine analog beam forming weight pointed by a fine analog beam measured according to the second pilot signal;
the receiving the data signal sent by the base station through the beam corresponding to the digital beam forming weight and the beam corresponding to the analog beam forming weight includes:
and receiving the data signals sent by the base station through the beams corresponding to the digital beam forming weight and the beams corresponding to the fine analog beam forming weight.
The storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

1. A method of channel measurement, comprising:
transmitting a first pilot signal to a terminal;
receiving index information of a beam or a sector with the maximum energy selected according to the first pilot signal, which is sent by the terminal;
transmitting a second pilot signal to the terminal through the beam or the sector with the largest energy;
receiving a digital beam forming weight value sent by the terminal after receiving the second pilot signal;
after receiving the digital beamforming weights sent by the terminal, the method further includes:
and sending data signals through beams corresponding to the digital beam forming weights and beams corresponding to analog beam forming weights, wherein the analog beam forming weights are analog beam forming weights pointed by the beams or the sectors with the maximum energy.
2. The method of claim 1, wherein before the transmitting the second pilot signal to the terminal through the beam or sector with the largest energy, the method further comprises:
sending a radio control resource (RRC) signaling to the terminal, wherein the RRC signaling comprises an antenna port number of a target antenna port for sending the second pilot signal and preset time;
the transmitting the second pilot signal to the terminal through the beam or sector with the largest energy includes:
and at the preset time, the second pilot signal is transmitted to the terminal by the beam or the sector with the maximum energy and by using the target antenna port.
3. The method of claim 1, wherein before the data signals are transmitted via the beams corresponding to the digital beamforming weights and the beams corresponding to the analog beamforming weights, the method further comprises:
receiving a fine analog beam forming weight value of a fine analog beam direction obtained by the terminal according to the measurement of a second pilot signal;
the sending of the data signal by the beam corresponding to the digital beam forming weight and the beam corresponding to the analog beam forming weight includes:
and transmitting data signals through the beams corresponding to the digital beam forming weights and the beams corresponding to the fine analog beam forming weights.
4. A method of channel measurement, comprising:
receiving a first pilot signal sent by a base station, wherein the first pilot signal is used for measuring and selecting a beam or a sector with the largest energy in a millimeter wave communication prediction available frequency band;
transmitting index information of the beam or sector with the maximum energy to the base station;
receiving a second pilot signal transmitted by the base station through the beam or the sector with the largest energy;
sending a digital beam forming weight to the base station, wherein the digital beam forming weight is obtained by estimating an analog beam forming channel according to the second pilot signal and calculating according to the analog beam forming channel;
after the sending the digital beamforming weights to the base station, the method further includes:
and receiving a data signal sent by the base station through a beam corresponding to the digital beam forming weight and a beam corresponding to an analog beam forming weight, wherein the analog beam forming weight is the analog beam forming weight pointed by the beam or the sector with the maximum energy.
5. The method of claim 4, wherein before receiving the second pilot signal transmitted by the base station through the beam or sector with the largest energy, the method further comprises:
and receiving RRC signaling sent by the base station.
6. The method of claim 4, wherein before the sending the digital beamforming weights to the base station, the method further comprises:
sending a fine analog beam forming weight to the base station, wherein the fine analog beam forming weight is a fine analog beam forming weight pointed by a fine analog beam measured according to the second pilot signal;
the receiving the data signal sent by the base station through the beam corresponding to the digital beam forming weight and the beam corresponding to the analog beam forming weight includes:
and receiving the data signals sent by the base station through the beams corresponding to the digital beam forming weight and the beams corresponding to the fine analog beam forming weight.
7. A channel measurement device, comprising:
a first sending module, configured to send a first pilot signal to a terminal;
a first receiving module, configured to receive index information of a beam or a sector with the largest energy selected according to the first pilot signal, where the beam or the sector is sent by the terminal;
a second transmitting module, configured to transmit a second pilot signal to the terminal through the beam or sector with the largest energy;
a second receiving module, configured to receive a digital beam forming weight sent by the terminal after receiving the second pilot signal;
and a data signal sending module, configured to send a data signal through a beam corresponding to the digital beam forming weight and a beam corresponding to an analog beam forming weight, where the analog beam forming weight is an analog beam forming weight pointed by the beam or the sector with the largest energy.
8. A channel measurement device, comprising:
a third receiving module, configured to receive a first pilot signal sent by a base station, where the first pilot signal is used to measure and select a beam or a sector with the largest energy in an available frequency band for millimeter wave communication prediction;
a third sending module, configured to send index information of the beam or sector with the largest energy to the base station;
a fourth receiving module, configured to receive a second pilot signal sent by the base station through the beam or sector with the largest energy;
a fourth sending module, configured to send a digital beamforming weight to the base station, where the digital beamforming weight is obtained by estimating an analog beamforming channel according to the second pilot signal and calculating according to the analog beamforming channel;
and a data signal receiving module, configured to receive a data signal sent by the base station through a beam corresponding to the digital beam forming weight and a beam corresponding to an analog beam forming weight, where the analog beam forming weight is an analog beam forming weight pointed by the beam or the sector with the largest energy.
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CN104303477A (en) * 2012-05-10 2015-01-21 三星电子株式会社 Communication method and apparatus using analog and digital hybrid beamforming
CN106576036A (en) * 2014-08-21 2017-04-19 Lg电子株式会社 Method and device for transmitting training symbol for estimating analog beam in wireless access system which supports hybrid beamforming
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