CN106982437B - Transmission method, base station and terminal for realizing millimeter wave communication - Google Patents

Transmission method, base station and terminal for realizing millimeter wave communication Download PDF

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CN106982437B
CN106982437B CN201610028908.2A CN201610028908A CN106982437B CN 106982437 B CN106982437 B CN 106982437B CN 201610028908 A CN201610028908 A CN 201610028908A CN 106982437 B CN106982437 B CN 106982437B
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port
base station
terminal
feedback
transmitting
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CN106982437A (en
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梅猛
刘文豪
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a transmission method, a base station and a terminal for realizing millimeter wave communication, wherein the transmission method comprises the following steps: the base station carries out mixed beam forming, different port and beam combination information is sent to the terminal when beam training is carried out, and a signaling for triggering a feedback mode is sent to the terminal according to the current available port resource condition; and the base station reallocates the transmitting ports and the transmitting beams according to the current available resource condition and the transmitting port and transmitting beam combination information of the base station fed back by the terminal port, and feeds back the reallocated information to the terminal. The invention can solve the problems of coverage area influence and cluster formation and cluster extinction which may occur in the LTE technology and the IEEE802.11ad technology.

Description

Transmission method, base station and terminal for realizing millimeter wave communication
Technical Field
The present disclosure relates to, but not limited to, the field of millimeter wave communication, and in particular, to a transmission method, a base station, and a terminal for implementing millimeter wave communication.
Background
With the development of communication technology, the service data processing capability of low frequency carriers has been gradually unable to meet the increasing data service requirements, so millimeter wave communication becomes one of the methods for solving high speed data communication at present. The wireless signal energy transmitted by the millimeter wave has high directivity, and research results show that the wireless transmission is carried out by adopting a 60GHz frequency band, and 99.99% of the signal energy is concentrated in a 4.7-degree beam range, so that when the wireless communication is carried out by utilizing a millimeter wave band, a high-frequency directional antenna or a phased array is usually adopted to carry out multi-beam directivity transmission. When the terminal receives multiple channels, each channel can transmit data with multiple ports matched with the base station, and when the terminal receives multiple channels, whether the terminal can flexibly utilize the resources of the multiple ports of the base station to exchange data becomes a problem to be solved by the current communication system design.
The existing technical schemes for data communication between multiple users and a base station, including LTE (Long Term Evolution) technology and IEEE (Institute of Electrical and Electronics Engineers) 802.11ad protocol, have some disadvantages.
There are three drawbacks in the current LTE scheme: firstly, the Massive MIMO (large-scale multiple input multiple output) technology introduces more ports, generally requires 32 or more ports, is limited by device cost in high-frequency communication, and is limited by the number of ports, and all the ports in the Massive MIMO technology share one antenna array, and the distances between antenna units in the whole antenna array are basically the same, and there is no obvious physical distance distinction, so that the physical distinction degree of generated beams is not high enough; secondly, when data transmission is carried out by a non-Massive MIMO technology in LTE, a transmitting terminal only carries out digital precoding and cannot support finer beam training; at present, the terminal only performs omni-directional reception and cannot generate finer beams, that is, if the base station implements fine beam training or transmission, the terminal cannot align with the base station through the fine beams, and the coverage area is finally affected.
The transmission and feedback scheme introduced in the IEEE802.11ad protocol also has two disadvantages: firstly, the beam training mode is fixed, the beam training can be performed only by a time division mode, the number of all DMG (high frequency directional antenna) antennas and sectors of a sender and a receiver during the beam training are counted, for example, 4 sectors are used for an antenna 1, 3 sectors are used for an antenna 2, 2 sectors are used for an antenna 3, 2 DMG antennas are used for a responder, the total scanning frequency is 18, then the beam training is performed, and finally the feedback is performed, so that the beam selection and the feedback cannot be flexibly performed according to the actual requirement; secondly, the data transmission method is fixed, and the base station and the terminal can only respectively select one port for data transmission according to the result of the beam training, so that the cluster-forming and cluster-extinguishing phenomena in high-frequency communication cannot be flexibly coped with.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the invention provides a transmission method, a base station and a terminal for realizing millimeter wave communication, and aims to solve the technical problem of cluster occurrence and cluster extinction in high-frequency communication.
The embodiment of the invention provides a transmission method for realizing millimeter wave communication, which comprises the following steps:
the base station carries out mixed beam forming, different port and beam combination information is sent to the terminal when beam training is carried out, and a signaling for triggering a feedback mode is sent to the terminal according to the current available port resource condition;
and the base station reallocates the transmitting ports and the transmitting beams according to the current available resource condition and the transmitting port and transmitting beam combination information of the base station fed back by the terminal port, and feeds back the reallocated information to the terminal.
Optionally, the transmission method further includes:
the signaling is a one-bit binary number identifier, when the binary number identifier is 0, the terminal is triggered to perform optimal port and beam combination feedback, and when the binary number identifier is 1, the port is triggered to perform multiple optimal port and beam combination feedback; or when the binary number is 0, triggering the port to perform a plurality of preferable port and beam combination feedbacks, and when the binary number is 1, triggering the terminal to perform an optimal port and beam combination feedback.
Optionally, the transmission method further includes: the signaling is the number of ports currently available for the base station.
Optionally, the transmission method further includes: and the base station sends the signaling when the terminal completes synchronization and performs beam information interaction with the terminal or sends a starting frame of beam training.
Optionally, the transmission method further includes: the number of times of beam training by the base station is counted by the following method:
the base station counts for each port individually, the times of the port performing the beam training are the number of the beams which need to be subjected to the radio frequency beam forming of the radio frequency beam training and correspond to the port, the count is reduced by 1 when the radio frequency beam training corresponding to the port is performed once, and the completion of the transmission beam training of the port is indicated when the count is 0.
Optionally, the transmission method further includes: after the base station feeds back the redistributed information to the terminal, the method further comprises the following steps:
and sending the same data to each port of the terminal when precoding is carried out according to the information fed back by each port of the terminal and the conditions of the transmitting port and the transmitting beam redistributed to each port of the terminal, or sending different data to each port according to different terminal port information.
An embodiment of the present invention further provides a base station, including:
the beam training module is used for carrying out mixed beam forming, sending different port and beam combination information to the terminal during beam training, and sending a signaling for triggering a feedback mode to the terminal according to the current available port resource condition;
and the allocation module is used for reallocating the transmitting ports and the transmitting beams according to the current available resource condition and the transmitting port and transmitting beam combination information of the base station fed back by the terminal port, and feeding back the reallocated information to the terminal.
Optionally, the base station further includes:
the beam training module sends signaling which is a one-bit binary number identifier, when the binary number identifier is 0, the terminal is triggered to perform optimal port and beam combination feedback, and when the binary number identifier is 1, the port is triggered to perform multiple optimal port and beam combination feedback; or when the binary number identifier is 0, triggering the port to perform a plurality of preferable port and beam combination feedbacks, and when the binary number identifier is 1, triggering the terminal to perform an optimal port and beam combination feedback; or
And the beam training module sends a signaling of the number of the ports currently available for the base station.
Optionally, the base station further includes:
and the beam training module is used for sending the signaling when the terminal performs beam information interaction with the terminal or sends a starting frame of beam training after the terminal completes synchronization.
Optionally, the base station further includes:
the beam training module counts the times of beam training by the following method: the base station counts for each port individually, the times of the port performing the beam training are the number of the beams which need to be subjected to the radio frequency beam forming of the radio frequency beam training and correspond to the port, the count is reduced by 1 when the radio frequency beam training corresponding to the port is performed once, and the completion of the transmission beam training of the port is indicated when the count is 0.
Optionally, the base station further includes:
and a precoding module, configured to send the same data to each port of the terminal when precoding is performed according to the information fed back by each port of the terminal and the conditions of the transmission port and the transmission beam reallocated to each port of the terminal by the allocation module, or send different data to each port according to different terminal port information.
The embodiment of the invention also provides a transmission method for realizing millimeter wave communication, which comprises the following steps:
each port of the terminal receives transmitting port and beam combination information generated by the mixed beam forming of the base station;
each port of the terminal selects a port and a beam to be fed back according to the received signal to interference plus noise ratio (SINR) or signal to noise ratio (SNR) information of the combination of the transmitting port and the beam;
and each port of the terminal selects to perform feedback of the optimal port and beam combination or selects to perform feedback of a plurality of beams and port combinations according to the signaling of the triggering feedback mode sent by the base station.
Optionally, the transmission method further includes: when each port of the terminal receives the signaling indication sent by the base station and adopts the optimal transmitting port and beam combination feedback, the feedback of the optimal port and beam combination according to the signaling selection comprises the following steps:
and each port of the terminal selects a beam which has the maximum SINR or SNR value and meets a first specified condition according to the received SINR or SNR of each transmitting port and beam combination of the base station.
Optionally, the transmission method further includes:
and when all the counts in the information sent by all the ports of the base station are 0, each port of the terminal feeds back.
Optionally, the transmission method further includes:
and when each port of the terminal receives the signaling indication sent by the base station and adopts a plurality of ports and beam combination feedback, the feedback of a plurality of beams and port combinations is selected according to the signaling.
Optionally, the transmission method further includes: the feedback of the combination of the plurality of beams and the ports by each port of the terminal according to the signaling selection comprises the following steps:
after the base station sends all the port and beam combinations, each port of the terminal selects a plurality of beams under a plurality of ports meeting a second specified condition according to the received SINR or SNR information of the transmitting port and beam combination of the base station, and then the beams are fed back; or
And when all ports used for beam training of the base station transmit beams once, each port of the terminal selects a transmitting port and a beam combination meeting a third specified condition for feedback according to the received SINR or SNR information of the current transmitting port and beam combination of the base station until the beam training is finished.
Optionally, the transmission method further includes: and the terminal combines the same transmitting port and beam combination of the base station fed back by different ports and feeds back the combined transmitting port and beam combination only once.
The embodiment of the present invention further provides a transmission device for implementing millimeter wave communication, which is disposed at a terminal port, and includes:
the receiving module is used for receiving the transmitting port and the beam combination information generated by the mixed beam forming of the base station;
the selection module is used for selecting a port and a beam to be fed back according to the received signal to interference plus noise ratio (SINR) or signal to noise ratio (SNR) information of the combination of the transmitting port and the beam;
and the feedback module is used for selecting to perform feedback of an optimal port and beam combination or selecting to perform feedback of a plurality of beams and port combinations according to the signaling of the trigger feedback mode sent by the base station.
Optionally, the transmission device further includes: the feedback module, when receiving the signaling indication sent by the base station as adopting the optimal transmitting port and beam combination feedback, selects the feedback of the optimal port and beam combination according to the signaling, including: and selecting the beam with the maximum SINR or SNR value and meeting the first specified condition according to the received SINR or SNR of each transmitting port and beam combination of the base station, and feeding back when the counts in the information sent by all the ports of the base station are all 0.
Optionally, the transmission device further includes:
and the feedback module is used for selecting the feedback of the combination of the plurality of the wave beams and the ports according to the signaling when the signaling indication sent by the base station is received to adopt the feedback of the combination of the plurality of the wave beams and the wave beams.
Optionally, the transmission device further includes:
the feedback module, selecting feedback of a plurality of beam and port combinations according to the signaling, includes: after the base station sends all the port and beam combinations, selecting a plurality of beams under a plurality of ports meeting a second specified condition according to the received SINR or SNR information of the transmitting port and beam combination of the base station, and then feeding back; or when all ports used for beam training of the base station transmit beams once, selecting a transmitting port and a beam combination meeting a third specified condition for feedback according to the received SINR or SNR information of the current transmitting port and beam combination of the base station until the beam training is finished.
In summary, the present invention provides a transmission method, a base station and a terminal for implementing millimeter wave communication, so as to solve the problems of coverage area influence and cluster occurrence in the LTE and IEEE802.11ad technologies.
Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a transmission method for implementing millimeter wave communication at a base station side according to an embodiment of the present invention;
fig. 2 is a flowchart of a transmission method for implementing millimeter wave communication at a terminal side according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an application scenario according to an embodiment of the present invention;
FIG. 4 is a flow chart illustrating optimal beam feedback according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of multiple preferred beam feedback according to an embodiment of the present invention;
FIG. 6 is a flow chart of the time-sharing feedback of multiple preferred beams according to the embodiment of the present invention;
FIG. 7 is a diagram illustrating multiple sub-band division according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a multi-subband feedback process according to an embodiment of the present invention;
FIG. 9 is a diagram of a base station according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a transmission device for implementing millimeter wave communication according to an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Fig. 1 is a flowchart of a transmission method for implementing millimeter wave communication at a base station side according to an embodiment of the present invention, and as shown in fig. 1, the transmission method according to the embodiment includes:
step 11, the base station performs mixed beam forming, sends different port and beam combination information to the terminal during beam training, and sends a signaling for triggering a feedback mode to the terminal according to the current available port resource condition;
and step 12, the base station reallocates the transmitting ports and the transmitting beams according to the current available resource condition and the transmitting port and transmitting beam combination information of the base station fed back by each port of the terminal, and feeds back the reallocated information to the terminal.
The signaling sent by the base station to the terminal may be any of the following manners:
A. the signaling is a one-bit binary number identifier and is 1 bit, when the binary number identifier is 0, the terminal is triggered to perform optimal port and beam combination feedback, and when the binary number identifier is 1, the port is triggered to perform multiple optimal port and beam combination feedback; or when the binary number identifier is 0, triggering the port to perform a plurality of preferable port and beam combination feedbacks, and when the binary number identifier is 1, triggering the terminal to perform an optimal port and beam combination feedback;
B. the signaling is the number of ports currently available for the base station.
And the base station sends the signaling when the terminal completes synchronization and performs beam information interaction with the terminal or sends a starting frame of beam training.
Wherein the number of times of the beam training by the base station is counted by:
the base station counts for each port individually, the times of the port performing the beam training are the number of the beams which need to be subjected to the radio frequency beam forming of the radio frequency beam training and correspond to the port, the count is reduced by 1 when the radio frequency beam training corresponding to the port is performed once, and the completion of the transmission beam training of the port is indicated when the count is 0.
The base station re-allocates the transmitting ports and the transmitting beams is a maximum set of the transmitting ports and the beam combinations at the base station side fed back by the ports of the terminal, that is, under the condition that the port resources occupied by other terminals are not conflicted, the maximum port number is selected, and simultaneously, the beam corresponding to each port is selected according to the feedback of the terminal, so that the requirement that each channel at the base station side can only transmit one beam at the same time is met.
The base station, according to the content fed back by each port of the terminal, and the transmission ports and beam conditions reallocated to each port of the terminal, may perform precoding on data sent by each port as one of the following conditions:
single-stream data, that is, the base station sends the same data to each port of the terminal;
and multi-stream data, namely, the base station sends different data to each port according to different terminal port information.
As shown in fig. 3, the base station has multiple ports, each port corresponds to one RF (radio frequency) chain, and the antenna array corresponding to each RF chain can transmit different beams. The port and beam concepts and functions of the terminal are similar to those of the base station.
The base station sends data through one or a plurality of transmitting ports and radio frequency transmitting beams corresponding to the ports, the terminal receives the data by using each receiving port and the receiving beam corresponding to the port, feedback is carried out according to the SINR (Signal to Interference plus Noise Ratio) or SNR (Signal Noise Ratio) of the information received by each port, and the feedback content is the port and beam information of the base station which is selected by each port of the terminal and meets the SINR or SNR requirements. After the resources of the transmitting port and the beam combination are redistributed by the base station, the base station utilizes the combination to carry out data transmission with the terminal.
Fig. 2 is a flowchart of a transmission method for implementing millimeter wave communication at a terminal side according to an embodiment of the present invention, and as shown in fig. 2, the transmission method according to the embodiment includes:
step 21, each port of the terminal receives a transmitting port and a beam combination generated by the mixed beam forming of the base station;
step 22, each port of the terminal selects a port and a beam to be fed back according to the received SINR or SNR information of the combination of the transmitting port and the beam;
and step 23, selecting to perform feedback of the optimal port and beam combination or selecting to perform feedback of a plurality of beams and port combinations according to the signaling of the trigger feedback mode sent by the base station.
After the terminal performs multi-port feedback and requires the terminal to set an SINR or SNR threshold value, each port performs judgment on the received SINR or SNR of the port and beam combination of the base station, and if the port of the terminal and the beam received by the beam of the base station side meet the SINR or SNR requirement, the port meets the condition of performing feedback to the base station, so that the requirement of performing multi-channel data transmission between the terminal and the base station is met.
The principle that each port of the terminal feeds back the optimal transmitting port and beam combination of the base station side is as follows:
the terminal receives a signaling sent by the base station, and indicates to adopt the optimal transmitting port and beam combination feedback; and each port of the terminal selects the optimal combination meeting the requirement according to the received SINR or SNR of each transmitting port and beam combination of the base station, namely the beam with the maximum SINR or SNR value selected by the terminal among a plurality of beams under each port of the base station.
And when all the counts in the information sent by all the ports of the base station side are 0, each port of the terminal feeds back.
The principle that each port of the terminal feeds back a plurality of transmitting ports and beam combinations on the base station side is as follows:
a terminal receives a signaling sent by a base station, and indicates that a plurality of ports and wave beam combination are adopted for feedback; and each port of the terminal selects a plurality of optimal beams under each port of the base station which meet the requirements according to the received SINR or SNR of each transmitting port and beam combination of the base station.
Optionally, the feedback mode of the plurality of preferred port and beam combinations is any one of the following modes:
a, feedback and beam training are performed in a time-sharing manner
When the beam training count sent by the base station side is 0, namely the base station side finishes sending all ports and beam combinations, each port of the terminal selects a plurality of beams under a plurality of channels according to the received SINR or SNR information of the base station side transmitting port and beam combination, and then the beams are fed back;
b, feedback and beam training are carried out simultaneously
All ports used for beam training at the base station side transmit primary beams, each port of the terminal selects a transmitting port and a beam combination meeting requirements for feedback according to the received SINR or SNR information of the transmitting port and the beam combination, and then selects and feeds back according to the port and the beam transmitted by the next beam training of the base station again until the beam training of the base station is finished.
The terminal carries out the intersection operation of the multi-port feedback content, combines the same transmitting port and beam combination of the base station side fed back by different ports of the terminal, and only feeds back once, thereby reducing the feedback overhead.
The terminal has different feedback methods according to the signaling triggering the feedback mode and the terminal, and the intersection taking operation exists in one of the following two moments:
aiming at the optimal port and beam combination feedback and a plurality of optimal combination modes, when feedback is carried out after the base station finishes beam sending training, intersection taking operation is carried out;
and aiming at a plurality of preferred combined feedback modes, performing intersection taking operation when feedback is required after beam training each time.
The method of the embodiment utilizes the characteristics of multiple ports, multiple beams, narrow beams and multiple ports of the terminal at the side of the high-frequency communication base station to trigger the terminal to perform multi-port feedback through the signaling sent by the base station. Because each port at the terminal side performs multi-beam combination feedback operation on the received base station side beam meeting the requirements, and the base station performs channel reallocation according to the feedback of the terminal, the base station can utilize the base station to a greater extent and allocate port and beam resources for the terminal more flexibly, the link quality can be effectively improved, the cluster occurrence and cluster failure phenomenon in high-frequency communication can be reduced, and meanwhile, the base station can not generate great influence on other terminals under the base station.
Fig. 3 shows an application scenario of the embodiment of the present invention, where both the base station side and the terminal side perform multi-port multi-beam training and data transmission, and the present invention is described in detail below with reference to the application scenario and the specific embodiment.
Example one
As shown in fig. 4, a general flow of a transmission method for implementing millimeter wave communication is described as follows, using the optimal port and beam combination feedback method described in the embodiment of the present invention:
step 101: and after the base station and the terminal finish synchronization, performing beam capability interaction and mutually informing respective ports and the receiving and transmitting capabilities of beams.
Aiming at a terminal needing beam training, when beam capability interaction is carried out or in a starting frame of the beam training, a base station sends a signaling to the terminal to inform the terminal that each port needs to carry out optimal transmitting port and beam combination feedback, and the basis for sending the signaling is that the base station can provide fewer resources such as the number of ports for data transmission for the newly accessed terminal needing data transmission at the moment.
Step 102: each port of the base station starts to carry out transmission beam training, and each training frame carries the number information of the port and the beam and the times of beam training.
As can be seen from FIG. 3, the base station shares NtEach port corresponding to a radio frequency end can generate MtEach beam has N at the terminal siderEach port corresponding to MrThe number of beams corresponding to each port of each beam may be different, and here, for example, each port corresponds to the same number of beams, and when the number of beams corresponding to each port is different, the calculation method in the following steps is similar.
The embodiment of the invention separately counts each transmitting port on the base station side, namely each port is counted as Mt×Mr. The number of times of transmitting beams by each port of the base station is traversed to each beam of the terminal, and when the number of beams of each port of the terminal is the same, M ist×MrEach time the number is decremented by 1, when the number is 0, it indicates that the port has completed training of the transmission beam for each reception beam of each port of the terminal, and may trigger each port of the terminal to start feedback.
Step 103: each port of the terminal receives the beam sent by each port of the base station side, and selects the optimal beam corresponding to each port of the base station which meets the SINR requirement according to the SINR (Signal to Interference plus Noise Ratio) maximization principle. The SINR setting at the terminal side must first meet the requirement of ensuring that the error code rate is not too high when data transmission is performed, and the specific setting can be set according to the self-requirement characteristics of the terminal.
As can be seen from FIG. 3, the terminal side has N in commonrEach port corresponding to MrA number of beams (since the number of ports and the number of beams on the terminal side are not so many at present, no change in beamforming on the terminal side is considered at first).
Each port of the terminal receives all the port and beam combinations of the base station side, and the ports and beam groups which meet the requirements are selected to be n in total according to the SINR maximization principle selected by each port of the terminaltA, wherein nt≤NtIndicating that the base station side transmitting port n is selectedtM corresponding to each transmitting porttThe one of the beams having the largest SINR.
Step 104: the terminal may not use all ports for feedback and data transmission due to limitations on the received SINR or SNR (which may be, but is not limited to, some of the following limitations, for example-5.1 dB for the demodulation threshold SNR at 1/8 when QPSK modulation is specified, or 7.9dB for the demodulation threshold SNR at 1/2 when 16QAM is specified), and therefore N is a factor of NrAssume that there is n in each portrPort is eligible by nrThe number of the base station transmitting ports and the number of the wave beam combinations selected by each port are respectively
Figure BDA0000907847930000121
Wherein n ist1And representing the set of the optimal port and beam combination of the transmitting end selected by the first port of the receiving end.
And performing intersection operation on the result selected by each port of the terminal, wherein the operation is that the terminal analyzes the selection result of each port, and when the optimal port of the base station selected by different ports of the terminal is the same as the beam combination, the same selection results are combined, so that multiple times of feedback are not performed by using a plurality of terminal ports.
Perform intersection taking operationAnd then, each port of the terminal feeds back, the feedback content is the optimal wave beam corresponding to each port of the base station side which is selected by each port of the terminal and meets the SINR requirement, and compared with the combination number before intersection, the feedback content is reduced to be the optimal wave beam corresponding to each port of the base station side according to the number of the combination contents which are combined and combined according to the number of the combination contents before intersection
Figure BDA0000907847930000122
Wherein the content of the first and second substances,
Figure BDA0000907847930000123
thereby enabling overhead to be reduced to some extent.
Step 105: the base station receiving feedback from the terminal
Figure BDA0000907847930000124
Individual ports, and beam combinations, with re-allocation of transmit ports and beams based on currently available resources, i.e. feedback from the terminal
Figure BDA0000907847930000125
Selecting some available ports and beams from the combination number of
Figure BDA0000907847930000126
Wherein the content of the first and second substances,
Figure BDA0000907847930000127
since the re-selection result of the base station may be due to more simultaneously trained terminals and some port and beam combinations fed back by the terminals cannot be allocated to the terminals, the re-allocated combinations need to be satisfied
Figure BDA0000907847930000128
Step 106: and the base station feeds back the reallocated port and beam information to the terminal.
Step 107: since the feedback before the terminal is fed back according to the port condition itself, the terminal can know which beam of which port is used for receiving according to the feedback of the base station in step 106, and simultaneously performs measurement feedback according to the content of the feedback of the base station,
step 108: and the base station performs precoding processing according to the reported result, so that data transmission between the base station and the terminal is realized.
Example two
As shown in fig. 5, a general flow of a transmission and feedback method for millimeter wave communication is shown, each port of a terminal adopts a plurality of preferred ports and a beam combination feedback mode, and a specific process is described as follows:
step 201: and after the base station and the terminal finish synchronization, performing beam capability interaction and mutually informing respective ports and the receiving and transmitting capabilities of beams.
Aiming at a terminal needing beam training, when beam capability interaction is carried out or in a starting frame of the beam training, a base station sends a signaling to the terminal to inform the terminal that each port needs to carry out combined feedback of a plurality of optimized ports and beams, and the basis of signaling sending is that the base station can provide more resources such as the number of ports for data transmission for the newly accessed terminal needing data transmission at the moment.
Step 202: each port of the base station starts to carry out transmission beam training, and each training frame carries the number information of the port and the beam and the times of beam training.
As can be seen from FIG. 3, the base station shares NtEach port corresponding to a radio frequency end can generate MtEach beam has N at the terminal siderEach port corresponding to MrThe number of beams corresponding to each port of each beam may be different, and here, for example, each port corresponds to the same number of beams, and when the number of beams corresponding to each port is different, the calculation method in the following steps is similar.
The embodiment of the invention separately counts each transmitting port on the base station side, namely each port is counted as Mt×Mr. The number of times of transmitting beams by each port of the base station is traversed to each beam of the terminal, and when the number of beams of each port of the terminal is the same, M ist×Mr. Each time training is performed, the count is decremented by 1, and when the count is 0, the port completes training of the transmission beam of each reception beam of each port of the terminal, and each port of the terminal can be triggered to start feedback.
Step 203: and each port of the terminal receives the wave beam sent by each port of the base station side, and selects a plurality of wave beams corresponding to each port of the base station meeting the SINR requirement according to the SINR information. The setting of the terminal-side SINR must first meet the requirement of ensuring that the error code rate is not too high when data transmission is performed, and the set SINR at this time may be different from that in the first embodiment, mainly ensuring that a plurality of beams can feed back, and the specific setting may be set according to the self-requirement characteristics of the terminal.
As can be seen from FIG. 3, the terminal side has N in commonrEach port corresponding to MrA number of beams (since the number of ports and the number of beams on the terminal side are not so many at present, no change in beamforming on the terminal side is considered at first).
Each port of the terminal receives the combination of all ports and beams at the base station side, and n ports and beam groups with SINR meeting the requirements are selected according to each port of the terminaltA, wherein nt≤Nt×MtIndicating that the base station side transmitting port n is selectedtM corresponding to each transmitting porttSeveral preferred beams among the beams that satisfy the set SINR.
Step 204: the terminal side may not use all ports for feedback and data transmission due to the limitation of the received SINR, so NrAssume that there is n in each portrPort is eligible by nrThe number of the base station transmitting ports and the number of the wave beam combinations selected by each port are respectively
Figure BDA0000907847930000141
Wherein n ist1And the set of the plurality of preferred ports and beam combinations of the transmitting end selected by the first port of the receiving end is represented.
And performing intersection taking operation aiming at the result selected by each port of the terminal. The operation is that the terminal analyzes the selection result of each port, when the optimal port of the base station selected by different ports of the terminal is the same as the beam combination, the same selection result is combined, and multiple feedbacks are not performed by using a plurality of terminal ports.
After the intersection operation is carried out, each port of the terminal feeds back, the feedback content is the optimized wave beam corresponding to each port of the base station side which is selected by each port of the terminal and meets the SINR requirement, and compared with the number of the combination before the intersection operation, the feedback content is reduced to be the optimized wave beam corresponding to each port of the base station side according to the number of the combination contents
Figure BDA0000907847930000142
Wherein the content of the first and second substances,
Figure BDA0000907847930000143
thereby enabling overhead to be reduced to some extent.
Step 205: the base station receiving feedback from the terminal
Figure BDA0000907847930000144
Individual port and beam combinations, the re-allocation of transmitting ports and beams being made according to the currently available resources, i.e. fed back from the terminal
Figure BDA0000907847930000145
Selecting some available ports and beams from the combination number of
Figure BDA0000907847930000146
Wherein the content of the first and second substances,
Figure BDA0000907847930000147
since the re-selection result of the base station may be due to more simultaneously trained terminals and some port and beam combinations fed back by the terminals cannot be allocated to the terminals, the re-allocated combinations need to be satisfied
Figure BDA0000907847930000151
Meanwhile, each port on the base station side can only transmit one beam at one moment, so that in the base station reallocation process, a plurality of beams under one port of the base station fed back by the terminal need to be chosen or rejected, and the principle is as follows:
A. when the optimal wave beam corresponding to the port is available, the optimal wave beam is selected for data transmission;
B. and if the optimal beam under the port is not available, selecting a suboptimal beam for data transmission, and the like.
The purpose of this feedback of multiple preferred port and beam combinations is to deal with the occurrence of situations where the optimal beam is not available.
Step 206: and the base station feeds back the reallocated port and beam information to the terminal.
Step 207: since the feedback before the terminal is fed back according to the port condition of the terminal, the terminal can know which beam of which port is used for receiving according to the feedback of the base station in step 206, and simultaneously, the terminal performs measurement feedback according to the content of the feedback of the base station.
And step 208, the base station performs precoding processing according to the reported result, so that data transmission between the base station and the terminal is realized.
EXAMPLE III
As shown in fig. 6, a feedback flow of a transmission and feedback method for millimeter wave communication is shown, where each port of a terminal adopts a multiple preferred port and beam combination feedback mode, and a mode that a base station side transmits beam training and each port of the terminal side performs feedback simultaneously is adopted, and a specific flow is described as follows:
step 301: and after the base station and the terminal finish synchronization, performing beam capability interaction and mutually informing respective ports and the receiving and transmitting capabilities of beams.
Aiming at a terminal needing beam training, when beam capability interaction is carried out or in a starting frame of the beam training, a base station sends a signaling to the terminal to inform the terminal that each port needs to carry out combined feedback of a plurality of optimized ports and beams, and the basis of signaling sending is that the base station can provide more resources such as the number of ports for data transmission for the newly accessed terminal needing data transmission at the moment.
Step 302: each port of the base station starts to perform transmit beam training, all ports are performed simultaneously, the transmit beams of the radio frequency end corresponding to each port can be in the same direction or different directions, and finally all ports and beam combinations need to be trained.
Each training frame carries the number information of the port and the beam, and as can be seen from fig. 5, the base station side has N in commontEach port corresponding to a radio frequency end can generate MtEach beam has N at the terminal siderEach port corresponding to MrThe number of beams corresponding to each port of each beam may be different, and here, for example, each port corresponds to the same number of beams, and when the number of beams corresponding to each port is different, the calculation method in the following steps is similar.
In the embodiment of the invention, each transmitting port on the base station side is counted independently, namely each port is counted as MtEach training of the transmit beam requires the transmission of MrThen the count is decremented by 1. The purpose of this is that after the base station transmits each wave beam, each channel of the terminal performs the receiving training, so as to select the optimal receiving wave beam, and determine the wave beam SNR of the base station performing the wave beam training transmission this time according to the optimal wave beam.
Because the base station side performs beam training for a plurality of ports simultaneously, each port of the terminal performs feedback once when the count of each port is reduced, and the terminal performs the last group of feedback when the count is 0, which indicates that the channel completes the beam training for the terminal.
Step 303: the terminal sets a threshold value of SNR, when the SNR of the combination of the port on the side of the base station and the beam received by each port reaches the threshold value, the combination meets the requirement and can be fed back, and the terminal sets a very small time window for receiving the beams transmitted by all the transmitting ports in the beam training.
The wave beam training has at most NtEach port and beam combination, then each port of the terminal selects a combination which meets the requirement from the combinations, and the total is ntA one, wherein
Figure BDA0000907847930000161
Wherein
Figure BDA0000907847930000162
Respectively representing the optimal port and the set of beam combinations which are selected by the port with feedback content at the terminal side and are sent by the base station beam training this time. And finishing the intersection operation during feedback, wherein the intersection operation is taken in a process similar to the embodiment.
Step 304: and the base station performs the transmission beam training until the count is 0, and the transmission beam at the moment is received by all the beams of each channel of the terminal, which indicates that the training is finished. Total performance of M at terminal sidetSub-feedback, all combinations are denoted as
Figure BDA0000907847930000163
Wherein n ist1The set of the first feedback of the receiving end is represented, and the representation modes of other elements in the set are the same.
Step 305: the base station receives the feedback information and reallocates the transmitting ports and beams according to the currently available resources, namely the feedback information fed back from the terminal
Figure BDA0000907847930000171
Some of the available ports and beams are selected from the combination.
Generally, the selected combination result after the reallocation is more than that of the first embodiment, because it can be known that more resources are currently available for the base station according to the feedback signaling sent by the base station at the beginning of the beam training, and then the information is notified to the terminal.
The contents of the following steps are similar to those of the embodiment, and are not described herein again.
Example four
As shown in fig. 7, this embodiment mainly introduces a situation that when the base station side is different from the first, second, and third embodiments, and each port and beam do not occupy the full bandwidth and occupy a smaller subband, according to overhead problems that may be encountered by terminal feedback, therefore, the embodiment adopts the method for feeding back the optimal port and beam combination introduced in the embodiment of the present invention, and a specific flow is shown in fig. 8, and is specifically described as follows:
step 401: and after the base station and the terminal finish synchronization, performing beam capability interaction and mutually informing respective ports and the receiving and transmitting capabilities of beams. Because the whole bandwidth of the base station side is divided into a plurality of sub-bands, all the required sub-bands need to be subjected to beam training when the beam training is carried out, wherein the information of the sub-bands can be embodied when the beam capabilities are interacted.
Aiming at a terminal needing beam training, when beam capability interaction is carried out or in a starting frame for carrying out beam training, a base station sends a signaling to the terminal to inform the terminal that each port needs to carry out optimal transmitting port and beam combination feedback, and the basis for sending the signaling is that the base station can provide fewer resources such as the number of ports for data transmission for the newly accessed terminal needing data transmission at the moment;
step 402: assuming that P sub-bands exist in the full bandwidth, the base station assigns each sub-band to NtPorts, each port corresponding to a radio frequency terminal MtAnd each training frame carries port and beam number information of each sub-band and the times of beam training.
As can be seen from fig. 5, N corresponds to each subband at the base station sidetEach port corresponding to a radio frequency end can generate MtEach beam has N at the terminal siderEach port corresponding to MrThe number of beams corresponding to each port of each beam may be different, and here, for example, each port corresponds to the same number of beams, and when the number of beams corresponding to each port is different, the calculation method in the following steps is similar.
Different from the counting method of the first embodiment, the base station performs the beam training, and the embodiment of the invention separately counts each transmitting port of each sub-band at the base station side, that is, each port of each sub-band is counted as Mt×Mr. The times of transmitting beams by each port of each sub-band of the base station need to traverse to each beam of the terminal, and when the number of the beams of each port of the terminal is the same, the number is Mt×Mr. Each time training is performed, the count is decremented by 1, and when the count is 0, the port completes training of the transmission beam of each reception beam of each port of the terminal, and each port of the terminal may be triggered to start feedback.
Step 403: and each port of the terminal receives the beam sent by each port of each sub-band at the base station side, and selects the optimal beam corresponding to each port of the base station meeting the SNR requirement according to the SNR maximization principle. The SNR setting at the terminal side must first meet the requirement of ensuring that the error code rate is not too high when data transmission is performed, and the specific setting can be set according to the self-requirement characteristics of the terminal.
Each port of the terminal receives the combination of all ports and beams of each sub-band at the base station side, and the ports and beam groups which meet the requirements of all the sub-bands are selected to be n in total according to the SNR maximization principle selected by each port of the terminaltA, wherein nt≤NtThat each sub-band on the base station side is selected in total is selected to select the corresponding transmitting port ntM corresponding to each transmitting porttThe one of the beams with the highest SNR.
Step 404: the terminal side may not use all ports for feedback and data transmission due to the limitation of the receiving SNR, so N isrAssume that there is n in each portrThe port is eligible. Thus from the nrThe number of the transmitting ports and the beam combinations of each sub-band at the base station side selected by each port is respectively
Figure BDA0000907847930000181
However, at this time, because of the existence of the sub-bands, the content that the terminal needs to feed back is still increased by multiple times, if the optimal port and beam combination selected by each port of the terminal side of each sub-band are the same or slightly different, the sub-band information can be combined and fed back, the information of the P sub-bands that originally need to be fed back is reduced to P, and P is satisfied to be less than or equal to P, so that the feedback quantity of the terminal can be greatly reduced.
And performing intersection taking operation aiming at the result selected by each port of the terminal. The operation is that the terminal analyzes the optimal port and beam combination of the selected base station side of each port, and when the optimal port and beam combination of the base station selected by different ports of the terminal are the same, the same selection results are combined, and multiple feedbacks are not performed by using a plurality of terminal ports.
After the intersection operation is carried out, each port of the terminal feeds back, the feedback content is the optimal wave beam corresponding to each port of the base station side which meets the SNR requirement and is selected by each port of the terminal, and compared with the combination number before the intersection operation, the feedback content is reduced to be the optimal wave beam corresponding to each port of the base station side, and the optimal wave beam meets the SNR requirement and is combined according to the number of the combined content
Figure BDA0000907847930000182
Wherein the content of the first and second substances,
Figure BDA0000907847930000191
thereby enabling overhead to be reduced to some extent.
Step 405: the base station receiving feedback from the terminal
Figure BDA0000907847930000192
Individual ports and beam combinations, based on currently available sub-band and port resources, for re-allocation of sub-bands, transmit ports and beams, i.e. feedback from the terminal
Figure BDA0000907847930000193
Selecting some usable sub-bands, ports and beams from the combination, the number of the combination is
Figure BDA0000907847930000194
Wherein the content of the first and second substances,
Figure BDA0000907847930000195
since the re-selection result of the base station may be due to more simultaneously trained terminals and some port and beam combinations fed back by the terminals cannot be allocated to the terminals, the re-allocated combinations need to be satisfied
Figure BDA0000907847930000196
The contents of the following steps are similar to those of the embodiment, and are not described herein again.
Fig. 9 is a schematic diagram of a base station according to an embodiment of the present invention, and as shown in fig. 9, the base station according to the embodiment includes:
the beam training module is used for carrying out mixed beam forming, sending different port and beam combination information to the terminal during beam training, and sending a signaling for triggering a feedback mode to the terminal according to the current available port resource condition;
and the allocation module is used for reallocating the transmitting ports and the transmitting beams according to the current available resource condition and the transmitting port and transmitting beam combination information of the base station fed back by each port of the terminal, and feeding back the reallocated information to the terminal.
The beam training module sends signaling which is a one-bit binary number identifier, when the binary number identifier is 0, the terminal is triggered to perform optimal port and beam combination feedback, and when the binary number identifier is 1, the port is triggered to perform multiple optimal port and beam combination feedback; or when the binary number identifier is 0, triggering the port to perform a plurality of preferable port and beam combination feedbacks, and when the binary number identifier is 1, triggering the terminal to perform an optimal port and beam combination feedback; or
And the beam training module sends a signaling of the number of the ports currently available for the base station.
The beam training module sends the signaling when the terminal performs beam information interaction with the terminal or when a starting frame for sending beam training is sent after the terminal completes synchronization.
Optionally, the number of times of performing the beam training by the beam training module is counted by: the base station counts for each port individually, the times of the port performing the beam training are the number of the beams which need to be subjected to the radio frequency beam forming of the radio frequency beam training and correspond to the port, the count is reduced by 1 when the radio frequency beam training corresponding to the port is performed once, and the completion of the transmission beam training of the port is indicated when the count is 0.
In an optional embodiment, the base station further includes:
and a precoding module, configured to send the same data to each port of the terminal when precoding is performed according to the information fed back by each port of the terminal and the conditions of the transmission port and the transmission beam reallocated to each port of the terminal by the allocation module, or send different data to each port according to different terminal port information.
Fig. 10 is a schematic diagram of a transmission device for implementing millimeter wave communication according to an embodiment of the present invention, where the transmission device of this embodiment is disposed at each port of a terminal, and includes:
the receiving module is used for receiving the transmitting port and the beam combination information generated by the mixed beam forming of the base station;
the selection module is used for selecting a port and a beam to be fed back according to the received signal to interference plus noise ratio (SINR) or SNR information of the combination of the transmitting port and the beam;
and the feedback module is used for selecting to perform feedback of an optimal port and beam combination or selecting to perform feedback of a plurality of beams and port combinations according to the signaling of the trigger feedback mode sent by the base station.
In an optional embodiment, when receiving a signaling indication sent by the base station and indicating that an optimal transmit port and beam combination is used for feedback, the feedback module selects to perform feedback of the optimal port and beam combination according to the signaling, including: and selecting the beam with the maximum SINR or SNR value and meeting the first specified condition according to the received SINR or SNR of each transmitting port and beam combination of the base station, and feeding back when the counts in the information sent by all the ports of the base station are all 0.
In an optional embodiment, when receiving a signaling indication sent by the base station and indicating that multiple ports and beam combinations are used for feedback, the feedback module selects to perform feedback of multiple beams and port combinations according to the signaling.
Wherein the feedback module, according to the signaling, selects to perform feedback of a combination of multiple beams and ports, including: after the base station sends all the port and beam combinations, selecting a plurality of beams under a plurality of channels meeting a second specified condition according to the received SINR or SNR information of the transmitting port and beam combination of the base station, and then feeding back; or when all ports used for beam training of the base station transmit beams once, selecting a transmitting port and a beam combination meeting a third specified condition for feedback according to the received SINR or SNR information of the current transmitting port and beam combination of the base station until the beam training is finished.
The first, second, and third specification conditions may be set to be the same condition (for example, the SINR threshold value is set to be the same), or may be set to be different conditions (that is, different SINR threshold values are set in the three cases).
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.
The foregoing is only a preferred embodiment of the present invention, and naturally there are many other embodiments of the present invention, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the scope of the appended claims.

Claims (21)

1. A transmission method for realizing millimeter wave communication comprises the following steps:
after the terminal completes synchronization, the base station performs mixed beam forming, sends different port and beam combination information to the terminal during beam training, and sends a signaling for triggering a feedback mode to the terminal according to the current available port resource condition;
and the base station reallocates the transmitting ports and the transmitting beams according to the current available resource condition and the transmitting port and transmitting beam combination information of the base station fed back by the terminal port, and feeds back the reallocated information to the terminal.
2. The transmission method according to claim 1, characterized in that:
the signaling is a one-bit binary number identifier, when the binary number identifier is 0, the terminal is triggered to perform optimal port and beam combination feedback, and when the binary number identifier is 1, the port is triggered to perform multiple optimal port and beam combination feedback; or when the binary number identifier is 0, triggering the port to perform a plurality of preferable port and beam combination feedbacks, and when the binary number identifier is 1, triggering the terminal to perform an optimal port and beam combination feedback;
wherein, the preferred port and beam combination refers to a port and beam combination meeting the set SINR or SNR requirement.
3. The transmission method according to claim 1, characterized in that:
the signaling is the number of ports currently available for the base station.
4. A transmission method according to any one of claims 1 to 3, characterized in that:
the base station sends the signaling when the base station carries out beam information interaction with the terminal or when the base station sends an initial frame of beam training.
5. The transmission method according to claim 1, characterized in that: the number of times of beam training by the base station is counted by the following method:
the base station counts for each port individually, the times of the port performing the beam training are the number of the beams which need to be subjected to the radio frequency beam forming of the radio frequency beam training and correspond to the port, the count is reduced by 1 when the radio frequency beam training corresponding to the port is performed once, and the completion of the transmission beam training of the port is indicated when the count is 0.
6. The transmission method according to claim 1, 2, 3 or 5, characterized in that: after the base station feeds back the redistributed information to the terminal, the method further comprises the following steps:
and sending the same data to each port of the terminal when precoding is carried out according to the information fed back by each port of the terminal and the conditions of the transmitting port and the transmitting beam redistributed to each port of the terminal, or sending different data to each port according to different terminal port information.
7. A base station, comprising:
the beam training module is used for carrying out mixed beam forming after the terminal completes synchronization, sending different port and beam combination information to the terminal during beam training, and sending a signaling for triggering a feedback mode to the terminal according to the current available port resource condition;
and the allocation module is used for reallocating the transmitting ports and the transmitting beams according to the current available resource condition and the transmitting port and transmitting beam combination information of the base station fed back by the terminal port, and feeding back the reallocated information to the terminal.
8. The base station of claim 7, wherein:
the beam training module sends signaling which is a one-bit binary number identifier, when the binary number identifier is 0, the terminal is triggered to perform optimal port and beam combination feedback, and when the binary number identifier is 1, the port is triggered to perform multiple optimal port and beam combination feedback; or when the binary number identifier is 0, triggering the port to perform a plurality of preferable port and beam combination feedbacks, and when the binary number identifier is 1, triggering the terminal to perform an optimal port and beam combination feedback; or
The beam training module sends signaling of the number of ports currently available to the base station;
wherein, the preferred port and beam combination refers to a port and beam combination meeting the set SINR or SNR requirement.
9. The base station according to claim 7 or 8, characterized in that:
the beam training module is used for sending the signaling when the beam information interaction is carried out with the terminal or when the starting frame of the beam training is sent.
10. The base station of claim 7, wherein:
the beam training module counts the times of beam training by the following method: the base station counts for each port individually, the times of the port performing the beam training are the number of the beams which need to be subjected to the radio frequency beam forming of the radio frequency beam training and correspond to the port, the count is reduced by 1 when the radio frequency beam training corresponding to the port is performed once, and the completion of the transmission beam training of the port is indicated when the count is 0.
11. The base station of claim 7, 8 or 10, wherein: further comprising:
and a precoding module, configured to send the same data to each port of the terminal when precoding is performed according to the information fed back by each port of the terminal and the conditions of the transmission port and the transmission beam reallocated to each port of the terminal by the allocation module, or send different data to each port according to different terminal port information.
12. A transmission method for realizing millimeter wave communication comprises the following steps:
after the terminal completes synchronization, each port of the terminal receives transmitting port and beam combination information generated by base station hybrid beam forming;
each port of the terminal selects a port and a beam to be fed back according to the received signal to interference plus noise ratio (SINR) or signal to noise ratio (SNR) information of the combination of the transmitting port and the beam;
and each port of the terminal selects to perform feedback of the optimal port and beam combination or selects to perform feedback of a plurality of beams and port combinations according to the signaling of the triggering feedback mode sent by the base station.
13. The transmission method according to claim 12, characterized in that:
when each port of the terminal receives the signaling indication sent by the base station and adopts the optimal transmitting port and beam combination feedback, the feedback of the optimal port and beam combination according to the signaling selection comprises the following steps:
and each port of the terminal selects a beam which has the maximum SINR or SNR value and meets a first specified condition according to the received SINR or SNR of each transmitting port and beam combination of the base station.
14. The transmission method according to claim 13, characterized in that: further comprising:
and when all the counts in the information sent by all the ports of the base station are 0, each port of the terminal feeds back.
15. The transmission method according to claim 12, characterized in that:
and when each port of the terminal receives the signaling indication sent by the base station and adopts a plurality of ports and beam combination feedback, the feedback of a plurality of beams and port combinations is selected according to the signaling.
16. The transmission method according to claim 15, characterized in that: the feedback of the combination of the plurality of beams and the ports by each port of the terminal according to the signaling selection comprises the following steps:
after the base station sends all the port and beam combinations, each port of the terminal selects a plurality of beams under a plurality of ports meeting a second specified condition according to the received SINR or SNR information of the transmitting port and beam combination of the base station, and then the beams are fed back; or
And when all ports used for beam training of the base station transmit beams once, each port of the terminal selects a transmitting port and a beam combination meeting a third specified condition for feedback according to the received SINR or SNR information of the current transmitting port and beam combination of the base station until the beam training is finished.
17. The transmission method according to claim 15 or 16, characterized by:
and the terminal combines the same transmitting port and beam combination of the base station fed back by different ports and feeds back the combined transmitting port and beam combination only once.
18. The utility model provides a realize transmission device of millimeter wave communication, sets up in terminal port, its characterized in that includes:
the receiving module is used for receiving the transmitting port and the beam combination information generated by the mixed beam forming of the base station after the terminal completes the synchronization;
the selection module is used for selecting a port and a beam to be fed back according to the received signal to interference plus noise ratio (SINR) or signal to noise ratio (SNR) information of the combination of the transmitting port and the beam;
and the feedback module is used for selecting to perform feedback of an optimal port and beam combination or selecting to perform feedback of a plurality of beams and port combinations according to the signaling of the trigger feedback mode sent by the base station.
19. The transmission apparatus according to claim 18, wherein:
the feedback module, when receiving the signaling indication sent by the base station as adopting the optimal transmitting port and beam combination feedback, selects the feedback of the optimal port and beam combination according to the signaling, including: and selecting the beam with the maximum SINR or SNR value and meeting the first specified condition according to the received SINR or SNR of each transmitting port and beam combination of the base station, and feeding back when the counts in the information sent by all the ports of the base station are all 0.
20. The transmission apparatus according to claim 18, wherein:
and the feedback module is used for selecting the feedback of the combination of the plurality of the wave beams and the ports according to the signaling when the signaling indication sent by the base station is received to adopt the feedback of the combination of the plurality of the wave beams and the wave beams.
21. The transmission apparatus according to claim 20, wherein:
the feedback module, selecting feedback of a plurality of beam and port combinations according to the signaling, includes: after the base station sends all the port and beam combinations, selecting a plurality of beams under a plurality of ports meeting a second specified condition according to the received SINR or SNR information of the transmitting port and beam combination of the base station, and then feeding back; or when all ports used for beam training of the base station transmit beams once, selecting a transmitting port and a beam combination meeting a third specified condition for feedback according to the received SINR or SNR information of the current transmitting port and beam combination of the base station until the beam training is finished.
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