WO2018149346A1 - Doa determining method, method for use in doa determining, access network device, and terminal - Google Patents

Abstract

Embodiments of the present application provide a DOA determining method, a method for use in DOA determining, an access network device, and a terminal. The method comprises: the access network device receives, by means of a first antenna sub-set, a first signal sent by a first terminal, the number of antennas in the first antenna sub-set being smaller than or equal to the number of radio frequency links of the access network device; and the access network device determines, according to the first signal, a first direction of arrival (DOA) of the first terminal sending the signal. Embodiments of the present application provide a DOA determining method, a method for use in DOA determining, an access network device, and a terminal, capable of reducing computing complexity of access network devices.

Description

Method for determining and determining DOA and access network devices and terminals

This application claims the priority of the Chinese patent application filed on February 15, 2017, the Chinese Patent Office, the application number is 201710081358.5, and the application name is "determined and used to determine the DOA and access network equipment and terminals". The content is incorporated herein by reference.

Technical field

Embodiments of the present application relate to the field of communications, and more particularly, to a method of determining a direction of arrival (DOA), a method for determining a DOA, an access network device, and a terminal.

Background technique

Wireless communication in the high frequency band is one of the key technologies of new wireless (new) (NR) communication. The high frequency band includes a centimeter wave band and a millimeter wave band. Among them, the centimeter wave band usually refers to the spectrum in the range of 3 GHz to 30 GHz, and the millimeter wave band usually refers to the spectrum in the range of 30 GHz to 300 GHz.

In the high frequency band, the path loss of data transmission is large. In order to reduce the path loss in the high frequency band, beam forming (BF) technology can be used.

Beamforming technology refers to controlling the direction of the transmitting beam by adding different weights to different antennas, so that the beam can better match the channel, so that the beam can concentrate energy-enhanced coverage. In addition, by using beamforming technology on the same time-frequency resource, data of different users can be transmitted through more spatial dimensions, thereby improving multiplexing gain.

An implementation manner of the beamforming technology is: the antenna of the access network device receives the signal, and transmits the signal to the baseband processing unit, and the baseband processing unit determines the DOA of the signal according to the signal received by the antenna, and uses the DOA information to design Excellent or optimal analog beam weights to obtain a better or optimal analog beam.

Wherein, since the size of the signal received by the baseband processing unit is much smaller than the antenna dimension, that is, the signal obtained by the baseband processing unit is the mixed data of the signals received by all the antennas of the access network device, therefore, the access network device needs to be from these mixed After the data is estimated to be full channel information, the DOA can be determined based on the estimated full channel information.

Specifically, the access network device needs to utilize the sparseness of the signal received by the antenna in the airspace, and uses the compressed sensing algorithm to estimate the full channel information of the antenna dimension according to the antenna signal transmitted by the radio frequency (RF) link.

In the above method of beamforming, a compression sensing algorithm is required, which causes the computational complexity of the access network device to be too high.

Summary of the invention

The embodiments of the present application provide a method for determining a DOA, a method for determining a DOA, an access network device, and a terminal, which can reduce computational complexity of an access network device.

In a first aspect, an embodiment of the present application provides a method for determining a DOA. The method includes: the access network device receiving, by using the first antenna subset, the first signal sent by the first terminal, where the number of antennas in the first antenna subset is less than or equal to the number of radio link links of the access network device; The access network device determines, according to the first signal, a first direction of arrival of the signal sent by the first terminal.

In the method, the access network device receives the first signal sent by the first terminal by using the first antenna subset, and the number of antennas in the first antenna subset is less than or equal to the number of the RF link, so the access network device receives The dimension of the first signal is less than or equal to the dimension of the RF link, so the access network device may not need to use a more complex algorithm such as a compressed sensing algorithm to determine channel information, but may directly base the antenna according to the first antenna subset. The received signal determines the DOA of the signal, thereby reducing the computational complexity of the access network device.

The access network device may be a Radio Access Network (RAN) device. The first signal is a DOA for the access network device to determine the signal of the first terminal. Specifically, the first signal may be a pilot signal, and further, the first signal may be a pilot signal that is specifically sent by the terminal for determining, by the access network device, the signal sent by the first terminal to determine the DOA. The antenna in the first antenna subset may be a collection of any of all antennas on the access network device. The first subset of antennas may be pre-configured on the access network device.

The access network device can connect the RF link with the first antenna subset by using a switch, so that the baseband processing unit of the access network device obtains the signal received by the first antenna subset, that is, the access network device passes The first antenna subset receives the first signal sent by the first terminal. The number of selection switches can be equal to or less than the number of RF links.

In a possible implementation manner, before the access network device receives the first signal sent by the first terminal by using the first antenna subset, the method further includes: the access network device to the first terminal Sending the first indication information, where the first indication information is used to instruct the first terminal to send the first signal.

In this implementation manner, the first indication information is sent by the access network device to the first terminal, and the first terminal is sent to determine the DOA of the signal sent by the first terminal, so that the signal of the first terminal can be improved. The flexibility of the DOA.

The access network device may send the first indication information to the first terminal by using a downlink control channel (DCCH) or a downlink broadcast channel (DBCH).

Optionally, the first terminal may send the first signal to the access network device according to its own needs.

In a possible implementation manner, before the access network device receives the first signal sent by the first terminal by using the first antenna subset, the method further includes: the access network device to the first terminal Sending the second indication information, where the second indication information is used to indicate that the first terminal sends the target subframe of the first signal, where the access network device receives, by using the first antenna subset, the first terminal to send The first signal includes: the access network device receiving the first signal by using the first antenna subset in the target subframe.

In this implementation manner, the access network device may send the second indication information to the first terminal, instructing the first terminal to send the target subframe of the first signal, and the access network device may send the first terminal to send in the target subframe. The first signal can improve the flexibility of using the subframe when the first terminal sends the first signal, thereby improving communication flexibility.

The access network device may send the second indication information to the first terminal by using a downlink control channel or a downlink broadcast channel.

If the access network device sends both the first indication information and the second indication information, the first indication information and the second indication information may be carried in the same message.

Alternatively, the first indication information and the second indication information may be the same indication information. For example, if the second indication information indicates the target subframe, the second indication information may also implicitly indicate that the first terminal sends the first signal, that is, the second indication information may also be used as the first indication information; If the target subframe is not indicated, it indicates that the first terminal does not need to send the first signal.

Optionally, the information about the target subframe that sends the first signal may be pre-configured on the first terminal, and the information about the target subframe that receives the first signal may be pre-configured on the access network device.

In a possible implementation manner, before the access network device receives the first signal sent by the first terminal by using the first antenna subset, the method further includes: the access network device to the first terminal Sending the third indication information, where the third indication information is used to indicate that the first terminal sends the following at least one location of the first signal: a time domain resource location and a frequency domain resource location.

In this implementation manner, the access network device may indicate, by using the third indication information, that the first terminal sends the time domain resource location or the frequency domain resource location of the first signal, or indicates both the time domain resource location and the frequency domain resource location, and The time domain resource location or the frequency domain resource location receives the first signal sent by the first terminal, so that the use flexibility of the time domain resource or the frequency domain resource can be improved, thereby improving communication flexibility.

The access network device may send the third indication information to the first terminal by using a downlink control channel or a downlink broadcast channel.

If the access network device sends the second indication information and the third indication information, the second indication information and the third indication information may be carried in the same message, and the third indication information indicates the time domain resource location or The frequency domain resource location may be a location in a target subframe indicated by the second indication information.

In a possible implementation manner, the method further includes: the access network device receiving, by using the second antenna subset, the second signal sent by the first terminal, where the number of antennas in the second antenna subset is less than or equal to The number of radio link links of the access network device; the access network device determines a second direction of arrival of the signal sent by the first terminal according to the second signal and the first direction of arrival.

In this implementation manner, since the second direction of arrival is determined by the second signal received by the second antenna subset and the first direction of arrival, the accuracy of the second direction of arrival can be improved, that is, the first terminal is improved. The accuracy of the direction of arrival of the signal can improve the efficiency of communication.

The second antenna subset may be the same as or different from the first antenna subset, and the second signal and the first signal may be the same signal.

The access network device can connect the RF link with the second antenna subset by using a selection switch, so that the baseband processing unit of the access network device obtains the signal received by the second antenna subset, that is, the access network device passes The second subset of antennas receives the second signal transmitted by the first terminal.

In a possible implementation manner, the method further includes: the access network device receiving, by using the second antenna subset, the second signal sent by the first terminal, where the number of antennas in the second antenna subset is less than or equal to The number of radio link links of the access network device, where the access network device determines, according to the first signal, a first direction of arrival of the signal sent by the first terminal, where: the access network device is configured according to Determining, by the first signal and the second signal, the first direction of arrival of the signal sent by the first terminal.

In this implementation, the first direction of arrival is determined by the access network device based on signals received by the two antenna subsets. Compared with the direction of arrival determined according to the signal received by one antenna subset, since more signals are based, the accuracy of the first direction of arrival can be improved, that is, the accuracy of the direction of arrival of the signal of the first terminal is improved. Therefore, the efficiency of communication can be improved.

The second antenna subset may be the same as or different from the first antenna subset, and the second signal and the first signal may be the same signal. The first signal and the second signal described herein, and the third signal described later, are for convenience of description, and are not intended to distinguish the signals transmitted by the first terminal.

In a possible implementation, the first terminal includes a first port and a second port, where the access network device receives the first signal sent by the first terminal by using the first antenna subset, including: Receiving, by the access network device, the first signal sent by the first port of the first terminal by using the first antenna subset; and determining, by the access network device, the first terminal according to the first signal The first direction of arrival of the sent signal includes: determining, by the access network device, a first direction of arrival of the signal sent by the first port according to the first signal; the method further includes: Receiving, by the third antenna subset, the third signal sent by the second port of the first terminal, where the first signal and the third signal are in a time division multiplexing manner and a frequency division multiplexing manner. And transmitting, by the at least one mode, the access network device determines, according to the third signal, a direction of arrival of the signal sent by the second port.

In this implementation manner, the first terminal may include multiple ports, and the access network device receives multiple ports of the first terminal by time division multiplexing or frequency division multiplexing, or by time division and frequency division multiplexing. signal of. At this time, the method of the method of determining the access network device is specifically the direction of the signal sent by the different ports of the first terminal, so that the direction of the arrival determined by the access network device is accurate to the port of the first terminal, thereby improving The accuracy of the communication.

The port can be a logical port or an antenna or an antenna port. The third antenna subset may be the same as or different from the first antenna subset, and the second signal and the first signal may be the same signal.

In this implementation manner, the third indication information may be used to indicate that the first port of the first terminal sends the at least one of the time domain resource location and the frequency domain resource location of the first signal, and may further indicate that the second port of the first terminal sends the third port. At least one of a time domain resource location and a frequency domain resource location of the signal.

In a possible implementation, the method further includes: the access network device receiving, by using a fourth antenna subset, a fourth signal sent by the second terminal; and the access network device according to the fourth signal, Determining a direction of arrival of the second terminal to transmit a signal, where the fourth signal and the first signal are sent in at least one of a time division multiplexing manner and a frequency division multiplexing manner.

In this implementation manner, the access network device may receive the first signal sent by the first terminal and the other terminal in at least one of a time division multiplexing manner and a frequency division multiplexing manner, that is, the access network device may further The signals transmitted by other terminals determine the DOA of the signals of other terminals, thereby improving the efficiency of communication.

The fourth antenna subset may be the same as or different from the first antenna subset.

In a possible implementation manner, the method further includes: determining, by the access network device, a beam that communicates with the first terminal according to the first direction of arrival.

Optionally, if the access network device determines the second direction of arrival according to the first direction of arrival and the second signal, the access network device may determine, according to the second direction of arrival, a beam that communicates with the first terminal. At this time, since the second direction of arrival is more accurate than the first direction of arrival, a beam having a higher communication quality is determined, so that communication quality can be improved.

In a possible implementation manner, the method further includes: the access network device transmitting a signal by using a beam scanning manner in a downlink subframe; the access network device receiving beam improvement information sent by the first terminal or a beam state information; the access network device selects a beam that communicates with the first terminal according to the beam improvement information or beam state information; wherein the access network device sends the first indication information to the first terminal, including When the access network device determines that the selected beam does not meet the preset communication condition, the access network device sends the first indication information to the first terminal.

That is, the access network device may send at least one of the first indication information, the second indication information, and the third indication information to the first terminal when the beam selected by the traditional beam scanning method does not meet the communication condition. The information is such that the access network device can perform the method in any one of the foregoing possible implementation manners, determine a direction of arrival of the signal of the first terminal, and determine a beam that communicates with the first terminal according to the direction of arrival.

The access network device can directly communicate with the first terminal by using the beam if the beam selected by the access network device according to the beam improvement information or the beam state information satisfies the communication condition.

In a second aspect, an embodiment of the present application provides a method for determining a DOA. The method includes: the terminal receiving the first indication information sent by the access network device, where the first indication information is used to instruct the terminal to send the first signal received by the first antenna subset of the access network device, where The first signal is used by the access network device to determine a DOA of the signal sent by the terminal, where the number of antennas in the first antenna subset is less than or equal to the number of radio link links of the access network device; The terminal sends the first signal according to the first indication information.

In the method, the terminal may send the first signal to the access network device according to the first indication information sent by the access network device, so that the access network device can determine the DOA of the signal sent by the terminal according to the first signal, thereby improving Determine the flexibility of the DOA of the signal of the terminal.

The first signal may be a pilot signal. Further, the pilot signal may be a pilot signal specifically transmitted by the terminal for determining, by the access network device, the DOA of the signal sent by the terminal.

Optionally, the terminal may also send the first signal to the access network device according to its own needs, without sending the first signal according to the first indication information.

In a possible implementation, the method further includes: the terminal receiving the second indication information sent by the access network device, where the second indication information is used to instruct the terminal to send the first signal And the transmitting, by the terminal, the first signal according to the first indication information, where the terminal sends the first signal in the target subframe according to the first indication information.

In this implementation manner, the terminal may send the first signal to the access network device in the target subframe according to the second indication information, so that the flexibility of the terminal to send the first signal may be improved, thereby improving communication flexibility.

In a possible implementation manner, the method further includes: receiving, by the terminal, third indication information that is sent by the access network device, where the third indication information is used to instruct the terminal to send the first signal At least one of the following locations: a time domain resource location or a frequency domain resource location; wherein the terminal sends the first signal according to the first indication information, including: the terminal according to the first indication information, The at least one location transmits the first signal.

In this implementation, the terminal may send the first to the access network device according to the time domain resource location or the frequency domain resource location indicated by the third indication information, or according to the time domain resource location and the frequency domain resource location indicated by the third indication information. Signals, which can increase the flexibility of use of time domain resources or frequency domain resources, thereby improving communication flexibility.

In a possible implementation, the terminal sends the first signal according to the first indication information, including: the terminal uses a time division multiplexing manner and a frequency division multiplexing manner according to the first indication information. At least one mode, the first signal is sent by the first port of the terminal, and the second signal is sent by the second port of the terminal, where the first signal is used to determine that the first port is sent The DOA of the signal, the second signal being used to determine the DOA of the signal transmitted by the second port.

In this possible implementation manner, the terminal may send a signal to the access network device through multiple ports in at least one of a time division multiplexing manner and a frequency division multiplexing manner, so that the access network device can determine each port. The direction of arrival of the signal can be used to determine a more accurate direction of arrival.

In a possible implementation manner, the terminal sends the first signal according to the first indication information, including: the terminal, according to the first indication information, time division multiplexing manner and frequency division with other terminals Transmitting the first signal in at least one of multiplexing modes.

In a possible implementation manner, the terminal may send a signal to the access network device in at least one of a time division multiplexing manner and a frequency division multiplexing manner, so that the access network device can determine multiple The direction of the signal of the terminal, which can improve the utilization of resources.

The terminal in the method may be the first terminal in the first aspect. Therefore, the technical features related to the first terminal in the first aspect are also applicable to the terminal in the method. For brevity, details are not described herein again.

In a third aspect, an access network device is provided, the access network device comprising means for performing a method of determining a DOA in any of the possible implementations of the first aspect or the first aspect.

In a fourth aspect, a terminal is provided, the terminal comprising means for performing the method for determining a DOA in any of the possible implementations of the second aspect or the second aspect.

In a fifth aspect, an access network device is provided, including a receiver and a processor, and optionally, a transmitter. The processor is for executing code. When the code is executed, the receiver and processor implement the method of determining a DOA in any one of the possible implementations of the first aspect or the first aspect.

In a sixth aspect, a terminal is provided, including a receiver, a processor, and a transmitter. The processor is for executing code. When the code is executed, the receiver, processor, and transmitter implement a method for determining a DOA in any one of the possible implementations of the second aspect or the second aspect.

A seventh aspect, a computer readable medium storing program code for execution by an access network device, the program code comprising for performing any of the first aspect or the first aspect An instruction to determine the method of the DOA in a possible implementation.

In an eighth aspect, a computer readable medium storing program code for execution by a terminal, the program code comprising for performing any one of the second aspect or the second aspect An instruction in the implementation for determining the method of the DOA.

A ninth aspect, a computer program product comprising instructions for causing an access network device to perform DOA determination in any one of the possible implementations of the first aspect or the first aspect when operating on an access network device Methods.

In a tenth aspect, there is provided a computer program product comprising instructions which, when run on a terminal, cause the terminal to perform the method for DOA in any of the possible implementations of the second aspect or the second aspect.

DRAWINGS

FIG. 1 is a schematic system architecture diagram of a method, an access network device, and a terminal to which an embodiment of the present application can be applied.

FIG. 2 is a schematic flowchart of a method for determining a DOA according to an embodiment of the present application.

FIG. 3 is a schematic structural diagram of an access network device according to an embodiment of the present application.

FIG. 4 is a schematic connection diagram of an antenna selection switch according to an embodiment of the present application.

FIG. 5 is a schematic flowchart of a method for determining an DOA by an access network device according to an embodiment of the present application.

FIG. 6 is a schematic flowchart of a method for determining an DOA by an access network device according to an embodiment of the present application.

FIG. 7 is a diagram showing an example of a signal transmitted by a plurality of ports of an access network device receiving terminal of an embodiment of the present application.

FIG. 8 is a diagram showing an example of a signal transmitted by a plurality of ports of an access network device receiving terminal of an embodiment of the present application.

FIG. 9 is a schematic flowchart of a method for determining a DOA according to an embodiment of the present application.

FIG. 10 is a schematic structural diagram of an access network device according to an embodiment of the present application.

FIG. 11 is a schematic structural diagram of a terminal according to an embodiment of the present application.

FIG. 12 is a schematic structural diagram of an access network device according to an embodiment of the present application.

FIG. 13 is a schematic structural diagram of a terminal according to an embodiment of the present application.

detailed description

Some of the terms used in the embodiments of the present application are described below so as to be understood by those skilled in the art.

1) A terminal, which may also be referred to as a user equipment, a client terminal device or a mobile equipment (ME), is a device that provides voice and/or data connectivity to a user, for example, a handheld device with wireless connectivity. , in-vehicle equipment, etc. Common terminals include, for example, mobile phones, tablets, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, and the like.

2) A radio access network (RAN) device, which may also be called a base station, is a device that connects a terminal to a wireless network, including but not limited to: a transmission reception point (TRP), Evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (base transceiver) Station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), or Wifi access point (AP).

3) High frequency band: Generally refers to frequency bands above 6 GHz, such as centimeter wave, millimeter wave, etc.

1 is an application scenario diagram of a method, an access network device, and a terminal in an embodiment of the present application. It should be understood that the application scenario shown in FIG. 1 is only an example, and other devices or devices may be included in the application scenario of the embodiment of the present application, or include devices similar in function to the devices in FIG. 1 .

The application scenario shown in FIG. 1 includes an access network device 110 and a terminal 120. The access network device 110 and the terminal 120 can communicate through the high frequency band. The terminal 120 may be a single antenna terminal or a multiple antenna terminal.

2 is an exemplary flowchart of a method of determining a DOA in an embodiment of the present application. It should be understood that FIG. 2 illustrates the steps or operations of the method of determining the DOA, but these steps or operations are merely examples, and other embodiments of the present application may also perform other operations or variations of the various operations in FIG. 2.

S210. The access network device receives, by using the first antenna subset, the first signal sent by the first terminal, where the number of antennas in the first antenna subset is less than or equal to the number of radio link links of the access network device.

The access network device may be a radio access network device. The access network device may include an antenna array, a radio frequency link, a baseband processing unit, and the like. The number of antennas included in the antenna array may be much larger than the number of radio links. In the embodiment of the present application, the radio frequency link may also be referred to as a channel. The baseband processing unit may specifically be a digital beam forming (DBF) baseband processing unit.

The first signal is a signal for the access network device to determine the DOA of the first terminal. The access network device can determine that the signal of the DOA of the first terminal can be referred to as a first signal.

In particular, the first signal may be a pilot signal. Further, the first signal may be a pilot signal that is specifically sent by the terminal for determining, by the access network device, the DOA of the first terminal to send a signal.

The antenna in the first antenna subset may be a collection of any of all antennas on the access network device. The first subset of antennas may be pre-configured on the access network device.

S220. The access network device determines, according to the first signal, a first direction of arrival of the signal sent by the first terminal.

For example, the access network device may use multiple signal classification (MUSIC), Capon, etc. to determine the DOA of the first signal according to the first signal.

In the embodiment of the present application, the access network device receives the first signal sent by the first terminal by using the first antenna subset, and the number of antennas in the first antenna subset is less than or equal to the number of the RF links, and therefore the access network device The dimension of the received first signal is less than or equal to the dimension of the RF link, so the access network device may not need to use a more complex algorithm such as a compressed sensing algorithm to determine channel information, but may directly according to the first antenna subset. The first signal received by the antenna determines the DOA, thereby reducing the computational complexity of the access network device.

In the embodiment of the present application, when the access network device receives the first signal of the first terminal by using the antenna in the first antenna set, the access network device may be implemented in multiple manners. An antenna selection unit may be added to the access network device, and the antenna selection unit may include a plurality of selection switches. The number of selection switches can be less than or equal to the number of radio links. Each selector switch can connect one of the RF link and one of the antenna arrays. All antennas connected to the radio frequency link through the selection switch constitute a first antenna set.

Typically, a selector switch can be fixedly coupled to an RF link that can connect the RF link to which it is connected to any antenna in the antenna array as desired. When different selection switches connect the corresponding RF link to different antennas in the antenna array, all antennas connected to the RF link through the selection switch constitute an antenna set. For convenience of description, the set of antennas may be referred to as a first antenna set, a second antenna set, or a third antenna set, and the like.

FIG. 3 is a schematic structural diagram of an access network device in which the method shown in FIG. 2 can be implemented. It should be understood that the access network device shown in FIG. 3 is only an example, and the access network device in the embodiment of the present application may further include other modules or units, or include modules similar to those of the modules in FIG. 3, or To include all the modules in Figure 3.

As shown in FIG. 3, the access network device in this embodiment of the present application may include an antenna array 310, an antenna selection unit 320, a plurality of radio frequency links 330, and a baseband processing unit 340.

Antenna array 310 can include multiple antennas. The antenna array 310, or the antenna array 310, may be used to transmit radio frequency signals to the terminal, and may also be used to receive radio frequency signals sent by the terminal.

The antenna selection unit 320 may include a plurality of antenna selection switches. The plurality of antenna selection switches can be connected to the plurality of radio frequency links 330 one by one.

It should be understood that each antenna selection switch and the corresponding radio frequency link may be directly connected or indirectly connected, for example, there may be other units or devices between the antenna selection switch and the radio frequency link.

As shown in FIG. 4, the antenna selection switch can connect the corresponding radio frequency link with any antenna in the antenna array. Specifically, the antenna selection switch can connect the corresponding radio frequency link with the corresponding antenna in the antenna array according to requirements.

It should be understood that each antenna selection switch shown in FIG. 4 can connect the corresponding radio frequency link with any antenna, which is only an example and should not constitute a limitation of the embodiment of the present application. For example, some antenna selection switches may only connect corresponding radio frequency links with certain specific antennas.

In this embodiment of the present application, the access network device may receive, by using different antenna subsets, signals that are available for determining the DOA sent by the first terminal in different time periods.

As shown in FIG. 5, the access network device may include four radio frequency links and four antenna selection switches. The antenna array of the access network device includes four sub-arrays, and each sub-array includes four antennas. In Fig. 5, one symbol represents a time period.

As shown in FIG. 5, the antenna selection switch of the access network device may connect the five radio frequency links with the first sub-array of the antenna array in the first symbol, and the first sub-array 1 is an antenna set. At this time, the access network device can receive the signal transmitted by the terminal through the four antennas in the sub-array 1, and determine the DOA according to the signal.

By analogy, the antenna selection switch of the access network device can connect the four radio frequency links with the sub-array 4 in the antenna array in the fourth symbol, and the sub-array 4 is an antenna set. At this time, the access network device can receive the signal transmitted by the terminal through the 4 antennas in the sub-array 4, and determine the DOA according to the signal.

Alternatively, as shown in FIG. 6, the antenna selection switch of the access network device may connect the four radio frequency links with the first antenna of the four sub-arrays in the first symbol, and the first antenna of the four sub-arrays Form a subset of antennas.

By analogy, the antenna selection switch of the access network device can connect the four RF links with the fourth antenna of the four sub-arrays in the fourth symbol. The fourth antenna of the four sub-arrays constitutes a subset of antennas.

The manner in which the antenna selection switch shown in FIG. 5 and FIG. 6 connects the radio frequency link to the antenna in the antenna array is only an example, and should not be limited in the embodiment of the present application.

In the method shown in FIG. 2, before the access network device receives the first signal sent by the first terminal by using the first antenna subset, the method further includes: the access network device sends the first indication information to the first terminal, where the first indication is The information is used to instruct the first terminal to send the first signal.

Sending the first indication information to the first terminal by the access network device, instructing the first terminal to send the first signal to determine the DOA of the signal sent by the first terminal, may improve the flexibility of determining the DOA of the signal sent by the first terminal.

The access network device may send the first indication information to the first terminal by using a downlink control channel or a downlink broadcast channel.

In the method shown in FIG. 2, before the access network device receives the first signal sent by the first terminal by using the first antenna subset, the method may further include: the access network device sends the second indication information to the first terminal, where the second indication is The information is used to instruct the first terminal to send the target subframe of the first signal. At this time, the access network device receives the first signal sent by the first terminal by using the first antenna subset, and the method may include: the access network device receives the first sent by the first terminal by using the first antenna subset in the target subframe. signal.

The access network device sends the second indication information to the first terminal, instructing the first terminal to send the target subframe of the first signal, and receiving the first signal sent by the first terminal in the target subframe, which can improve the access network device and The flexibility of communication between terminals.

The access network device may send the second indication information to the first terminal by using a downlink control channel or a downlink broadcast channel.

If the access network device sends both the first indication information and the second indication information, the first indication information and the second indication information may be carried in the same message.

Alternatively, the first indication information and the second indication information may be the same indication information. For example, if the second indication information indicates the target subframe, the second indication information may also implicitly indicate that the first terminal sends the first signal, that is, the second indication information may also be used as the first indication information; If the target subframe is not indicated, it indicates that the first terminal does not need to send the first signal.

Optionally, the information about the target subframe that sends the first signal may be pre-configured on the first terminal, and the information about the target subframe that receives the first signal may be pre-configured on the access network device. The pre-configured target subframe receives the first signal sent by the first terminal.

In the method shown in FIG. 2, before the access network device receives the first signal sent by the first terminal by using the first antenna subset, the method further includes: the access network device sends the third indication information to the first terminal, where the third indication is The information is used to indicate that the first terminal sends the following at least one location of the first signal: a time domain resource location and a frequency domain resource location.

That is, the access network device may instruct the first terminal to send the time domain resource location or the frequency domain resource location of the first signal, or may indicate both the time domain resource location and the frequency domain resource location.

In this implementation manner, the access network device instructs the first terminal to send the time domain resource location or the frequency domain resource location of the first signal, or both the time domain resource location and the frequency domain resource location, and in the time domain resource location or The frequency domain resource location receives the first signal sent by the first terminal, so that the flexibility of communication between the access network device and the first terminal can be improved.

The access network device may send the third indication information to the first terminal by using a downlink control channel or a downlink broadcast channel.

If the access network device sends the second indication information and the third indication information, the second indication information and the third indication information may be carried in the same message, and the third indication information may be indicated by the second indication information. The time domain resource location or frequency domain resource location in the target subframe.

If the access network device sends the first indication information and the second indication information, and the third indication information is also sent, the first indication information, the second indication information, and the third indication information may be carried in the same message.

It should be understood that the access network device and the first terminal may be pre-configured with a time domain resource location or a frequency domain resource location where the first terminal sends the first signal. At this time, the access network device may not need to send the third indication information.

The method shown in FIG. 2 may further include: the access network device receiving, by using the second antenna subset, the second signal sent by the first terminal, where the number of antennas in the second antenna subset is less than or equal to the radio frequency of the access network device. The number of links; the access network device determines the second direction of arrival of the signal sent by the first terminal according to the second signal and the first direction of arrival.

Since the second direction of arrival is determined according to the second signal received by the second antenna subset and the first direction of arrival, the accuracy of the second direction of arrival can be improved, that is, the direction of arrival of the signal of the first terminal is improved. The accuracy of the communication can improve the efficiency of communication.

As shown in FIG. 5, the access network device may determine, according to the signal received by the sub-array 1, the first DOA of the first terminal to send a signal, and then the access device may determine, according to the signal received by the sub-array 2 and the first DOA, that the first terminal sends the signal. The second DOA of the signal.

It should be understood that the second antenna subset may be the same as or different from the first antenna subset, and the second signal and the first signal may be the same signal.

The method for the access network device to receive the second signal sent by the first terminal by using the second antenna subset may refer to the method for the access network device to receive the first signal sent by the first terminal by using the first antenna subset, and details are not described herein again. .

The first signal and the second signal described herein, and the third signal described later, are for convenience of description, and are not intended to distinguish the signals transmitted by the first terminal.

The method shown in FIG. 2 may further include: the access network device receiving, by using the second antenna subset, the second signal sent by the first terminal, where the number of antennas in the second antenna subset is less than or equal to the radio link of the access network device. Quantity. The determining, by the access network device, the first direction of the first terminal to send the signal according to the first signal, the method may include: determining, by the access network device, the first terminal according to the first signal and the second signal The first direction of arrival of the transmitted signal.

That is to say, the first direction of arrival is determined by the access network device based on the signals received by the two antenna subsets. Compared with the direction of arrival determined according to the signal received by one antenna subset, since more signals are based, the accuracy of the first direction of arrival can be improved, that is, the accuracy of the direction of arrival of the signal of the first terminal is improved. Therefore, the efficiency of communication can be improved.

As shown in FIG. 5, the access network device can determine the second DOA of the first terminal to transmit a signal according to the signal received by the sub-array 1 and the signal received by the sub-array 2.

The method for the access network device to receive the second signal sent by the first terminal by using the second antenna subset may refer to the method for the access network device to receive the first signal sent by the first terminal by using the first antenna subset, and details are not described herein again. .

The second antenna subset may be the same as or different from the first antenna subset, and the second signal and the first signal may be the same signal.

In the method shown in FIG. 2, the first terminal may include a first port and a second port. At this time, the access network device receives the first signal sent by the first terminal by using the first antenna subset, and the method may include: the access network device receiving, by using the first antenna subset, the first signal sent by the first port of the first terminal. The access network device determines, according to the first signal, the first direction of arrival of the signal sent by the first terminal, where the access network device determines, according to the first signal, the first direction of arrival of the signal sent by the first port.

In addition, the method shown in FIG. 2 may further include: the access network device receiving, by using the third antenna subset, the third signal sent by the second port of the first terminal, where the first signal and the third signal are time division multiplexed and frequency And transmitting, by the at least one mode, the access network device determines, according to the third signal, a direction of arrival of the signal sent by the second port.

In this implementation manner, the access network device receives signals sent by multiple ports of the first terminal by time division multiplexing or frequency division multiplexing, or by time division and frequency division multiplexing. At this time, the method of the method of determining the access network device is specifically the direction of the signal sent by the different ports of the first terminal, so that the direction of the arrival determined by the access network device is accurate to the port of the first terminal, thereby improving The accuracy of the communication.

The port can be a logical port or an antenna or an antenna port. The second antenna subset may be the same as or different from the first antenna subset, and the second signal and the first signal may be the same signal.

It should be understood that the first terminal may also include a larger number of ports, and the signals may be transmitted between the ports by time division multiplexing or frequency division multiplexing.

In this implementation manner, the third indication information may be used to indicate that the first port of the first terminal sends the at least one of the time domain resource location and the frequency domain resource location of the first signal, and may further indicate that the second port of the first terminal sends the third port. At least one of a time domain resource location and a frequency domain resource location of the signal.

FIG. 7 is a schematic diagram of signals transmitted by four ports of the first terminal in a time division multiplex manner. As shown in FIG. 7, the target resource may include four different time domain resources, and the terminal may send the signal by using the first port on the first time domain resource and using the second port on the second time domain resource. The signal uses a third port to transmit the signal on the third time domain resource and a fourth port to transmit the signal on the fourth time domain resource.

Correspondingly, the access network device may determine the DOA of the first port of the first terminal according to the signal on the first time domain resource, and determine the DOA of the second port of the first terminal according to the signal on the second time domain resource. Determining, by the signal on the third time domain resource, the DOA of the third port of the first terminal, and determining the DOA of the fourth port of the first terminal according to the signal on the fourth time domain resource.

FIG. 8 is a schematic diagram of signals transmitted by four ports of the first terminal in a frequency division multiplexing manner. As shown in FIG. 8, the target resource may include four different frequency domain resources, and the terminal may use the first port to send a signal on the first frequency domain resource and the second port on the second frequency domain resource. The signal is sent, the third port is used to transmit the signal on the third frequency domain resource, and the fourth port is used to transmit the signal on the fourth frequency domain resource.

Correspondingly, the access network device may determine the DOA of the first port of the first terminal according to the signal on the first frequency domain resource, and determine the DOA of the second port of the first terminal according to the signal on the second frequency domain resource. Determining a DOA of the third port of the first terminal according to the signal on the third frequency domain resource, and determining a DOA of the fourth port of the first terminal according to the signal on the fourth frequency domain resource.

The method shown in FIG. 2 may further include: the access network device receiving the fourth signal sent by the second terminal by using the fourth antenna subset; and determining, by the access network device, the second terminal sending the signal according to the fourth signal a direction of arrival, wherein the fourth signal and the first signal are transmitted in at least one of a time division multiplexing manner and a frequency division multiplexing manner.

That is to say, the access network device can receive signals transmitted by different terminals through time division multiplexing or frequency division multiplexing, and determine the DOA of each terminal according to the signal sent by each terminal, thereby improving the communication efficiency.

The method shown in FIG. 2 may further include: determining, by the access network device, a beam that communicates with the first terminal according to the first direction of arrival.

Specifically, determining, by the access network device, the beam that is in communication with the first terminal may include: the access network device determining an analog beam weight that can communicate with the first terminal.

If the access network device determines the second direction of arrival according to the first wave direction and the second signal, the access network device may determine the beam that communicates with the first terminal according to the second direction of arrival. At this time, since the second direction of arrival is more accurate than the first direction of arrival, a beam having a higher communication quality is determined, so that communication quality can be improved.

Or it can be said that each time the access network device determines the DOA, the corresponding beam can be determined according to the DOA.

The method shown in FIG. 2 may further include: the access network device transmits a signal by means of beam scanning in a downlink subframe; and the access network device receives beam improvement information or beam state information sent by the first terminal; The device selects a beam that communicates with the first terminal according to the beam improvement information or beam state information. At this time, the first indication information is sent by the access network device to the first terminal, where the access network device sends the first indication information to the first terminal when the access network device determines that the selected beam does not meet the preset communication condition.

That is, the access network device may send the first indication information (may also send the second indication information or the third indication information) to the first terminal when the beam selected by the traditional beam scanning method does not meet the communication condition. So that the access network device can perform the above corresponding method, determine the direction of arrival of the signal of the first terminal, and determine the beam that communicates with the first terminal according to the direction of arrival.

The access network device can directly communicate with the first terminal by using the beam if the beam selected by the access network device according to the beam improvement information or the beam state information satisfies the communication condition.

FIG. 9 is a schematic flowchart of a method for determining a DOA according to an embodiment of the present application. It should be understood that FIG. 9 illustrates steps or operations of a method for determining a DOA, but these steps or operations are merely examples, and other embodiments of the present application may also perform other operations or variations of the various operations in FIG.

S910: The terminal receives the first indication information sent by the access network device, where the first indication information is used to indicate that the terminal sends the first signal received by the first antenna subset of the access network device, where the first signal is used by the access network device to determine The DOA of the signal transmitted by the terminal, the number of antennas in the first antenna subset is less than or equal to the number of radio links of the access network device.

S920. The terminal sends the first signal according to the first indication information.

In the method, the terminal may send the first signal to the access network device according to the first indication information sent by the access network device, so that the access network device can determine the DOA of the signal sent by the terminal according to the first signal, thereby improving Determine the flexibility of the DOA of the signal of the terminal.

The first signal may be a pilot signal. Further, the pilot signal may be a pilot signal that is specifically sent by the terminal for determining, by the access network device, the DOA of the terminal to send a signal.

Optionally, the terminal may also send the first signal to the access network device according to its own needs, without sending the first signal according to the first indication information.

The method shown in FIG. 9 may further include: the terminal receiving the second indication information sent by the access network device, where the second indication information is used to instruct the terminal to send the target subframe of the first signal. The sending, by the terminal, the first signal according to the first indication information may include: the terminal transmitting the first signal in the target subframe according to the first indication information.

The terminal sends the first signal to the access network device in the target subframe according to the second indication information, so that the flexibility of the terminal to send the first signal can be improved, thereby improving communication flexibility.

The method shown in FIG. 9 may further include: the terminal receiving the third indication information sent by the access network device, where the third indication information is used to instruct the terminal to send the following at least one location of the first signal: a time domain resource location or frequency Domain resource location. The sending, by the terminal, the first signal according to the first indication information may include: the terminal sending the first signal in the at least one location according to the first indication information.

The terminal sends the first signal to the access network device according to the time domain resource location or the frequency domain resource location indicated by the third indication information, or according to the time domain resource location and the frequency domain resource location indicated by the third indication information, so that the time can be improved. The flexibility of the use of domain resources or frequency domain resources, thereby increasing the flexibility of communication.

In the method shown in FIG. 9, the terminal sends the first signal according to the first indication information, which may include: the terminal uses at least one of a time division multiplexing manner and a frequency division multiplexing manner according to the first indication information, and the terminal passes through the terminal. The first port transmits the first signal and the second signal is transmitted through the second port of the terminal. The first signal is used to determine the DOA of the signal sent by the first port, and the second signal is used to determine the DOA of the signal sent by the second port.

The terminal sends a signal to the access network device through multiple ports in at least one of a time division multiplexing mode and a frequency division multiplexing mode, so that the access network device can determine the direction of the signal of each port, that is, the terminal can Determine a more accurate direction of arrival.

In the method shown in FIG. 9, the terminal sends the first signal according to the first indication information, which may include: at least one of a time division multiplexing manner and a frequency division multiplexing manner with the other terminal according to the first indication information, Send the first signal.

The terminal and the other terminal send a signal to the access network device in at least one of a time division multiplexing manner and a frequency division multiplexing manner, so that the access network device can determine the direction of the signal of the multiple terminals, thereby Improve resource utilization.

The terminal in the method shown in FIG. 9 may be the first terminal in the method shown in FIG. 2. Therefore, the technical features related to the first terminal in the method shown in FIG. 2 are equally applicable to the terminal in the method shown in FIG. For the sake of brevity, it will not be repeated here.

The method of the embodiment of the present application is described above with reference to FIG. 2 to FIG. 9. The access network device and the terminal of the embodiment of the present application are described below with reference to FIG. 10 to FIG.

FIG. 10 is a schematic frame of an access network device according to an embodiment of the present application. It should be understood that the access network device 1000 illustrated in FIG. 10 is only an example, and the access network device in the embodiment of the present application may further include other modules or units, or include modules similar in function to the respective modules in FIG. 10, or It is not intended to include all of the modules in Figure 10.

The receiving module 1010 is configured to receive, by using the first antenna subset, the first signal sent by the first terminal, where the number of antennas in the first antenna subset is less than or equal to the number of radio frequency links of the access network device.

The processing module 1020 is configured to determine, according to the first signal, a first direction of arrival of the signal sent by the first terminal.

The access network device receives the first signal sent by the first terminal by using the first antenna subset, and the number of antennas in the first antenna subset is less than or equal to the number of the RF links, so the first signal received by the access network device The dimension is less than or equal to the dimension of the RF link, so the access network device may not need to use a more complex algorithm such as a compressed sensing algorithm to determine the channel information, but may directly determine the signal received by the antenna in the first antenna subset. The DOA can thus reduce the computational complexity of the access network device.

Optionally, the access network device may further include a sending module 1030, configured to send the first indication information to the first terminal, where the first indication information is used to instruct the first terminal to send the first signal.

Optionally, the sending module 1030 is configured to send the second indication information to the first terminal, where the second indication information is used to indicate that the first terminal sends the target subframe of the first signal. The receiving module is specifically configured to receive the first signal by using the first antenna subset in the target subframe.

Optionally, the sending module 1030 is configured to send the third indication information to the first terminal, where the third indication information is used to indicate that the first terminal sends the following at least one location of the first signal: Domain resource location and frequency domain resource location.

Optionally, the receiving module is further configured to receive, by using the second antenna subset, the second signal sent by the first terminal, where the number of antennas in the second antenna subset is less than or equal to the radio frequency link of the access network device. Quantity. The processing module is further configured to determine a second direction of arrival of the signal sent by the first terminal according to the second signal and the first direction of arrival.

Optionally, the receiving module is further configured to receive, by using the second antenna subset, the second signal sent by the first terminal, where the number of antennas in the second antenna subset is less than or equal to the radio frequency link of the access network device. Quantity. The processing module is specifically configured to determine, according to the first signal and the second signal, the first direction of arrival of the signal sent by the first terminal.

Optionally, the first terminal may include a first port and a second port. The receiving module is specifically configured to receive, by using the first antenna subset, the first signal sent by the first port of the first terminal. The processing module is specifically configured to determine, according to the first signal, a first direction of arrival of the first port sending signal. The receiving module is further configured to receive, by using a third antenna subset, a third signal sent by the second port of the first terminal, where the first signal and the third signal are time division multiplexed and frequency The sub-multiplexing method transmits at least one of the modes. The processing module is further configured to determine a direction of arrival of the second port transmission signal according to the third signal.

Optionally, the receiving module is further configured to receive, by using the fourth antenna subset, the fourth signal sent by the second terminal, where the processing module is further configured to determine, according to the fourth signal, that the second terminal sends The direction of arrival of the signal. The fourth signal and the first signal are sent in at least one of a time division multiplexing manner and a frequency division multiplexing manner.

It should be understood that the above-mentioned and other operations and/or functions of the respective units of the access network device in the embodiment of the present application shown in FIG. 10 are respectively used to implement the corresponding process of the method for determining the DOA in FIG. 2, and for the sake of brevity, Narration.

FIG. 11 is a schematic structural diagram of a terminal according to an embodiment of the present application. It should be understood that the terminal 1100 shown in FIG. 11 is only an example, and the terminal in the embodiment of the present application may further include other modules or units, or include modules similar in function to the respective modules in FIG. 11, or not included in FIG. All modules.

The receiving module 1110 is configured to receive first indication information that is sent by the access network device, where the first indication information is used to indicate that the terminal sends the first signal received by the first antenna subset of the access network device, where The first signal is used by the access network device to determine a DOA of the terminal to send a signal, where the number of antennas in the first antenna subset is less than or equal to the number of radio link links of the access network device.

The sending module 1120 is configured to send the first signal according to the first indication information.

The terminal may send the first signal to the access network device according to the first indication information sent by the access network device, so that the access network device may determine the DOA of the signal sent by the terminal according to the first signal, thereby improving the determining the terminal signal. The flexibility of the DOA.

Optionally, the receiving module is further configured to receive second indication information that is sent by the access network device, where the second indication information is used to instruct the terminal to send a target subframe of the first signal. The sending module is specifically configured to send the first signal in the target subframe according to the first indication information.

Optionally, the receiving module is further configured to receive the third indication information that is sent by the access network device, where the third indication information is used to indicate that the terminal sends the following at least one location of the first signal. : Time domain resource location or frequency domain resource location. The processing module is specifically configured to send the first signal in the at least one location according to the first indication information.

Optionally, the sending module is specifically configured to send, according to the first indication information, the first port by using the first port of the terminal by using at least one of a time division multiplexing manner and a frequency division multiplexing manner. And transmitting a second signal through the second port of the terminal. The first signal is used to determine a DOA of the first port transmission signal, and the second signal is used to determine a DOA of a signal sent by the second port.

Optionally, the sending module is specifically configured to send, according to the first indication information, the first signal by using at least one of a time division multiplexing manner and a frequency division multiplexing manner with another terminal.

It should be understood that the foregoing and other operations and/or functions of the respective units of the terminal in the embodiment of the present application shown in FIG. 11 are respectively implemented in order to implement the corresponding process of the method for determining the DOA in FIG. 9. For brevity, details are not described herein again. .

FIG. 12 is a schematic structural diagram of an access network device according to another embodiment of the present application. It should be understood that the access network device 1200 shown in FIG. 12 is only an example, and the access network device in the embodiment of the present application may further include other modules or units, or include modules similar in function to the respective modules in FIG. 12, or It is not intended to include all of the modules in Figure 12.

The receiver 1220 can be used to implement the operations or steps that the receiving module 1010 in FIG. 10 can implement. The processor 1210 can be used to implement the operations or steps that the processing module 1020 in FIG. 10 can implement. The transmitter 1230 can be used. The operations or steps that can be implemented by the transmitting module 1030 in FIG. 10 are implemented. For the sake of brevity, it will not be repeated here.

FIG. 13 is a schematic structural diagram of a terminal according to another embodiment of the present application. It should be understood that the terminal 1300 shown in FIG. 13 is only an example, and the terminal 1300 of the embodiment of the present application may further include other modules or units, or include modules similar to those of the modules in FIG. 13, or not including FIG. All modules in .

The processor 1210 can be used to implement the operations or steps that the receiving module 1110 in FIG. 11 can implement. The transmitter 1330 can be used to implement the operations that the sending module 1120 in FIG. 11 can implement. Or steps. For the sake of brevity, it will not be repeated here.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims (26)

A method for determining DOA of a direction of arrival, characterized in that it comprises: The access network device receives the first signal sent by the first terminal by using the first antenna subset, where the number of antennas in the first antenna subset is less than or equal to the number of radio link links of the access network device; The access network device determines, according to the first signal, a first direction of arrival of the signal sent by the first terminal. The method according to claim 1, wherein the method further comprises: before the access network device receives the first signal sent by the first terminal by using the first antenna subset, the method further comprising: The access network device sends first indication information to the first terminal, where the first indication information is used to instruct the first terminal to send the first signal. The method according to claim 1 or 2, wherein before the access network device receives the first signal sent by the first terminal by using the first antenna subset, the method further includes: The access network device sends the second indication information to the first terminal, where the second indication information is used to indicate that the first terminal sends the target subframe of the first signal; The access network device receives the first signal sent by the first terminal by using the first antenna subset, including: The access network device receives the first signal through the first antenna subset in the target subframe. The method according to any one of claims 1 to 3, wherein before the access network device receives the first signal sent by the first terminal by using the first antenna subset, the method further includes: The access network device sends third indication information to the first terminal, where the third indication information is used to indicate that the first terminal sends the following at least one location of the first signal: a time domain resource location and Frequency domain resource location. The method according to any one of claims 1 to 4, further comprising: The access network device receives the second signal sent by the first terminal by using the second antenna subset, where the number of antennas in the second antenna subset is less than or equal to the number of radio link links of the access network device; The access network device determines, according to the second signal and the first direction of arrival, a second direction of arrival of the signal sent by the first terminal. The method according to any one of claims 1 to 4, further comprising: The access network device receives the second signal sent by the first terminal by using the second antenna subset, where the number of antennas in the second antenna subset is less than or equal to the number of radio link links of the access network device; The access network device determines, according to the first signal, a first direction of arrival of the signal sent by the first terminal, including: The access network device determines, according to the first signal and the second signal, the first direction of arrival of the signal sent by the first terminal. The method according to any one of claims 1 to 6, wherein the first terminal comprises a first port and a second port; The access network device receives the first signal sent by the first terminal by using the first antenna subset, including: Receiving, by the access network device, the first signal sent by the first port by using the first antenna subset; Determining, by the access network device, the first direction of arrival of the signal sent by the first terminal according to the first signal, including: Determining, by the access network device, a first direction of arrival of the signal sent by the first port according to the first signal; The method further includes: Receiving, by the third antenna subset, the third signal sent by the second port of the first terminal, where the first signal and the third signal are time division multiplexed and frequency divided Sent by at least one of the methods; And determining, by the access network device, a direction of arrival of the second port sending signal according to the third signal. The method according to any one of claims 1 to 7, wherein the method further comprises: Receiving, by the access network device, the fourth signal sent by the second terminal by using the fourth antenna subset; Determining, by the access network device, a direction of arrival of the signal sent by the second terminal according to the fourth signal, where the fourth signal and the first signal are time division multiplexed and frequency division multiplexed At least one way to send. A method for determining a DOA of a direction of arrival, characterized by comprising: The terminal receives the first indication information sent by the access network device, where the first indication information is used to indicate that the terminal sends the first signal received by the first antenna subset of the access network device, where the first signal is used by the terminal Determining, by the access network device, a DOA that is sent by the terminal, where the number of antennas in the first antenna subset is less than or equal to the number of radio links of the access network device; The terminal sends the first signal according to the first indication information. The method of claim 9 wherein the method further comprises: The terminal receives the second indication information that is sent by the access network device, where the second indication information is used to instruct the terminal to send the target subframe of the first signal; The sending, by the terminal, the first signal according to the first indication information, including: The terminal sends the first signal in the target subframe according to the first indication information. The method according to claim 9 or 10, wherein the method further comprises: The terminal receives the third indication information that is sent by the access network device, where the third indication information is used to indicate that the terminal sends the following at least one location of the first signal: a time domain resource location or a frequency domain resource. position; The sending, by the terminal, the first signal according to the first indication information, including: The terminal sends the first signal in the at least one location according to the first indication information. The method according to any one of claims 9 to 11, wherein the transmitting, by the terminal, the first signal according to the first indication information comprises: The terminal sends the first signal and the second terminal through the terminal by using the first port of the terminal, according to the first indication information, by using at least one of a time division multiplexing manner and a frequency division multiplexing manner. The port transmits a second signal, wherein the first signal is used to determine a DOA of the first port transmit signal, and the second signal is used to determine a DOA of the second port transmit signal. The method according to any one of claims 9 to 12, wherein the transmitting, by the terminal, the first signal according to the first indication information comprises: And transmitting, by the terminal, the first signal according to the first indication information to at least one of a time division multiplexing manner and a frequency division multiplexing manner. An access network device, comprising: a receiving module, configured to receive, by using the first antenna subset, the first signal sent by the first terminal, where the number of antennas in the first antenna subset is less than or equal to the number of radio frequency links of the access network device; And a processing module, configured to determine, according to the first signal, a first direction of arrival of the signal sent by the first terminal. The access network device according to claim 14, wherein the access network device further comprises a sending module, configured to send first indication information to the first terminal, where the first indication information is used to indicate The first terminal sends the first signal. The access network device according to claim 14, wherein the access network device further comprises a sending module, configured to send second indication information to the first terminal, where the second indication information is used to indicate Transmitting, by the first terminal, a target subframe of the first signal; The receiving module is specifically configured to receive the first signal by using the first antenna subset in the target subframe. The access network device according to claim 14, wherein the access network device further comprises a sending module, configured to send third indication information to the first terminal, where the third indication information is used to indicate The first terminal sends at least one of the following locations of the first signal: a time domain resource location and a frequency domain resource location. The access network device according to any one of claims 14 to 17, wherein the receiving module is further configured to receive, by using a second antenna subset, a second signal sent by the first terminal, the second antenna The number of antennas in the subset is less than or equal to the number of radio links of the access network device; The processing module is further configured to determine a second direction of arrival of the signal sent by the first terminal according to the second signal and the first direction of arrival. The access network device according to any one of claims 14 to 17, wherein the receiving module is further configured to receive, by using a second antenna subset, a second signal sent by the first terminal, the second antenna The number of antennas in the subset is less than or equal to the number of radio links of the access network device; The processing module is specifically configured to determine, according to the first signal and the second signal, the first direction of arrival of the signal sent by the first terminal. The access network device according to any one of claims 14 to 19, wherein the first terminal comprises a first port and a second port; The receiving module is specifically configured to receive, by using the first antenna subset, the first signal sent by the first port of the first terminal; The processing module is specifically configured to determine, according to the first signal, a first direction of arrival of the signal sent by the first port; The receiving module is further configured to receive, by using a third antenna subset, a third signal sent by the second port of the first terminal, where the first signal and the third signal are time division multiplexed and frequency divided At least one of the multiplexing methods is sent; The processing module is further configured to determine, according to the third signal, a direction of arrival of the second port transmission signal. The access network device according to any one of claims 14 to 20, wherein the receiving module is further configured to receive, by using the fourth antenna subset, the fourth signal sent by the second terminal; The processing module is further configured to determine, according to the fourth signal, a direction of arrival of the signal sent by the second terminal, where the fourth signal and the first signal are time division multiplexed and frequency division multiplexed In at least one of the ways to send. A terminal, comprising: a receiving module, configured to receive first indication information that is sent by the access network device, where the first indication information is used to indicate that the terminal sends a first signal, and the first signal is used by the access network device to determine the The DOA of the signal sent by the terminal; And a sending module, configured to send the first signal according to the first indication information. The terminal according to claim 22, wherein the receiving module is further configured to receive second indication information that is sent by the access network device, where the second indication information is used to instruct the terminal to send the a target subframe of a signal; The sending module is specifically configured to send the first signal in the target subframe according to the first indication information. The terminal according to claim 22 or 23, wherein the receiving module is further configured to receive third indication information that is sent by the access network device, where the third indication information is used to indicate that the terminal sends the Determining at least one of the following locations of the first signal: a time domain resource location or a frequency domain resource location; The processing module is specifically configured to send the first signal in the at least one location according to the first indication information. The terminal according to any one of claims 22 to 24, wherein the sending module is configured to use at least one of a time division multiplexing mode and a frequency division multiplexing mode according to the first indication information. Transmitting, by the first port of the terminal, the first signal, and transmitting, by the second port of the terminal, a second signal, where the first signal is used to determine a DOA of the first port sending signal, where The second signal is used to determine the DOA of the second port to transmit a signal. The terminal according to any one of claims 22 to 25, wherein the sending module is specifically configured to use at least one of a time division multiplexing manner and a frequency division multiplexing manner with other terminals according to the first indication information. In one mode, the first signal is transmitted.

Images