WO2020020316A1

WO2020020316A1 - Communication method and device

Info

Publication number: WO2020020316A1
Application number: PCT/CN2019/097799
Authority: WO
Inventors: 薛祎凡; 王键; 刘海涛
Original assignee: 华为技术有限公司
Priority date: 2018-07-27
Filing date: 2019-07-26
Publication date: 2020-01-30
Also published as: CN110768772A; CN110768772B

Abstract

The present application provides a communication method and device. The communication method comprises: a first terminal device sending sounding reference signal (SRS) indication information to a first network device; the SRS indication information being used to indicate a first time interval and a second time interval, the first time interval being a time interval during which a first number of antennas are used to send the SRS, the second time interval being a time interval during which a second number of antennas are used to send the SRS, the first number being greater than the second number. Accordingly, the present application further provides a corresponding communication device. The present application can effectively improve the accuracy of channel estimation of a communication device.

Description

Communication method and device

Technical field

The present application relates to the field of communication technologies, and in particular, to a communication method and device.

Background technique

Generally, a terminal device can support dual cards, one of which is a primary card and one is a secondary card. When using a UE with dual cards, the following scenario occurs: if the primary card is in an active state, the secondary card is in a discontinuous reception (DRX) cycle. Specifically, the DRX cycle may include a cycle configured by the base station for the UE when the UE is in an idle state. In this period, the UE may wake up at a fixed time to receive a paging message and a downlink reference signal. As shown in FIG. 1, an on part may represent a time when the UE wakes up to receive a downlink signal (also referred to as an active period), and an off part may represent a time when the UE does not receive a downlink signal (also referred to as a sleep period).

At the same time, when the terminal equipment is equipped with multiple antennas, the antenna selection function can be enabled to improve communication performance. When the main card is to select antennas, different antennas are used for sounding reference signal (SRS) rotation. Assume that the UE includes two antennas: antenna 1 and antenna 2. When the secondary card is in the off state as shown in FIG. 1, the main card can perform SRS round transmission normally. However, when the secondary card is in the on state as shown in FIG. 1, the secondary card needs to use one antenna to receive the paging message. At this time, the main card cannot use two antennas arbitrarily, so it will affect the main card's rotation of SRS, and then cause the base station. The accuracy of channel estimation is low.

Summary of the Invention

The present application provides a communication method and device, which can effectively improve the accuracy of channel estimation performed by a base station.

In a first aspect, an embodiment of the present application provides a communication method, including: a first terminal device sending a probe reference signal SRS indication information to a first network device; wherein the SRS indication information is used to indicate a first time interval and a first time interval; Two time intervals, the first time interval is a time interval in which the SRS is transmitted using a first number of antennas, the second time interval is a time interval in which the SRS is transmitted using a second number of antennas, the first number is greater than Said second number.

In the embodiment of the present application, when the first terminal device cannot normally perform the SRS rotation, by sending the SRS instruction information to the first network device, the first network device can be notified in time that the first terminal device is rotating the SRS. This can not only enable the first terminal device to perform normal SRS rotation, but also improve the accuracy of channel estimation of the first network device.

In a possible implementation manner, the SRS indication information is further used to indicate that the SRS is transmitted using the first number of antennas in the first time interval, and that the SRS is used in the second time interval. The second number of antennas transmits the SRS.

In the embodiment of the present application, by further indicating to the first network device the specific number of antennas used in the first time interval and the second time interval, the first network device can clearly know the status of the antenna used by the first terminal device, thereby The accuracy of channel estimation of the first network device is further improved.

In a possible implementation manner, the method further includes: sending, by the first terminal device, the SRS using the first number of antennas in a first time interval; and the first terminal device in a second time interval Within which the SRS is transmitted using the second number of antennas; the first terminal device receives uplink scheduling information from a first network device; the first terminal device sends the first scheduling device to the first terminal device according to the uplink scheduling information The network device sends uplink data.

In the embodiment of the present application, after the first terminal device sends the SRS instruction information to the first network device, so that the first network device clearly knows how to perform channel estimation, the first terminal device may according to the instruction in the SRS instruction information. To send SRS.

In a possible implementation manner, after the first terminal device sends the detection reference signal SRS indication information to the first network device, and after the first terminal device is in a first time interval, use the first Before the first terminal device sends the SRS using the second number of antennas within a second time interval, the method further includes: the first terminal device receives The confirmation information of the first network device; wherein the confirmation information is used to indicate confirmation of the SRS indication information; or the confirmation information is used to indicate the first time interval and the second time interval; or, The confirmation information is used to indicate that the SRS is transmitted using the first number of antennas during the first time interval, and the second number of antennas is used to transmit the SRS during the second time interval. SRS.

In the embodiment of the present application, in order to further improve the efficiency of interaction between the first terminal device and the first network device, the first terminal device may also use the first time interval in the first time interval after receiving the confirmation information sent by the first network device. A number of antennas send SRS, and in a second time interval, a second number of antennas are used to send SRS, so that the first network device can accurately determine how to perform channel estimation, thereby further improving the accuracy of channel estimation by the first network device. degree.

In a possible implementation manner, when the first terminal device does not receive the confirmation information, the first terminal device sends the SRS indication information to the first network device again; or, When the first terminal device does not receive the confirmation information, the first terminal device sends the SRS by using a third number of antennas.

In the embodiment of the present application, if the first terminal device does not receive the confirmation information, it is likely that the first network device does not receive the SRS instruction information, and therefore the first terminal device may resend the SRS instruction information. Or, in the case that the first terminal device does not receive the confirmation information, it is likely that the first network device has not confirmed the SRS indication information, so the first terminal device may use the original configuration, such as a third quantity. The antenna sends SRS.

In a possible implementation manner, the second time interval includes an idle period of a discontinuous reception of a DRX cycle of a second terminal device, and the second terminal device is a target for using the second time interval. For a terminal device of an antenna, the target antenna is an antenna belonging to the first number of antennas, but not an antenna among the second number of antennas.

In the embodiment of the present application, the first time interval may include a sleep period in which the second terminal device receives the idle state of the DRX cycle discontinuously, and the second terminal device may not need to use an antenna during the first time interval; In the time interval, that is, the second time interval may include an idle period of the DRX cycle of the second terminal device, the second terminal device may need to use an antenna such as a target antenna. Therefore, in the second time interval, the first The terminal device may not normally use the target antenna for round robin, so that the first terminal device can send the SRS indication information to the first network device, so that the first network device can know which antennas the SRS sends from the first terminal device, and This enables the first network device to accurately perform channel estimation.

In a possible implementation manner, when the second terminal device does not use the target antenna within the second time interval, the first terminal device sends a cancellation instruction to the first network device. , The cancellation instruction is used to instruct the SRS to be sent using the third number of antennas.

In the embodiment of the present application, in some emergency or sudden states, the second terminal device may suddenly not need the target antenna. Therefore, the first terminal device may send a cancellation instruction to the first network device in time, so that The first network device can update the channel estimation method in time.

In a possible implementation manner, the second time interval includes a time interval obtained after compensation according to a time difference between the first network device and the second network device; The network equipment to which the second terminal equipment is connected is described.

In the embodiment of the present application, the first network device and the second network device may be the same device, but the first network device and the second network device may also be different devices. When the first network device and the second network device are different devices, the time of the first network device may not correspond to the time of the second network device. Therefore, the idle state of the DRX cycle of the second terminal device is passed. Performing time compensation during the activation period of the IPC can make the first network device know the second time interval explicitly.

In a second aspect, an embodiment of the present application further provides a communication method, including:

The first network device receives SRS indication information of a sounding reference signal from a first terminal device, where the SRS indication information is used to indicate a first time interval and a second time interval, and the first time interval is a first quantity of A time interval for transmitting SRS by the antenna, the second time interval is a time interval for transmitting the SRS using a second number of antennas, the first number is greater than the second number; the first network device is based on the SRS Instruction information for channel estimation.

In a possible implementation manner, the method further includes: receiving, by the first network device, the SRS sent by the first terminal device using the first number of antennas within a first time interval; The first network device receives the SRS sent by the first terminal device using the second number of antennas within a second time interval.

In a possible implementation manner, after the first network device receives the detection reference signal SRS indication information from the first terminal device, and the first network device receives the first terminal device within a first time interval , Before using the SRS sent by the first number of antennas, before the first network device receives the SRS sent by the first terminal device using the second number of antennas within a second time interval, The method further includes: the first network device sends confirmation information to the first terminal device; wherein the confirmation information is used to indicate confirmation of the SRS indication information; or the confirmation information is used to indicate the confirmation A first time interval and the second time interval; or the confirmation information is used to indicate that the SRS is transmitted using the first number of antennas within the first time interval and that the second time interval Within the interval, the SRS is transmitted using the second number of antennas.

In a possible implementation manner, the method further includes: when the first network device does not send the confirmation information to the first terminal device, the first network device receives the SRS again. Instruction information; or, in a case where the first network device does not send the confirmation information to the first terminal device, the first network device receives the first terminal device that uses the third number of antennas to send the confirmation information. The SRS.

In a possible implementation manner, the method further includes: in a case where the second terminal device does not use the target antenna within the second time interval, the first network device receives the data from the first network device. A cancellation instruction of the first terminal device, where the cancellation instruction is used to instruct to use the third number of antennas to send the SRS.

In a third aspect, an embodiment of the present application provides a terminal device, including:

A first sending unit, configured to send sounding reference signal SRS indication information to a first network device; wherein the SRS indication information is used to indicate a first time interval and a second time interval, and the first time interval is to use the first time interval The number of antennas transmits a time interval of the SRS, and the second time interval is a time interval of transmitting the SRS using a second number of antennas, and the first number is greater than the second number.

In a possible implementation manner, the terminal device further includes: a second sending unit, configured to send the SRS using the first number of antennas within a first time interval; the second sending unit, And is further configured to send the SRS by using the second number of antennas in a second time interval; a receiving unit is configured to receive uplink scheduling information from a first network device; and the first sending unit is further configured to The uplink scheduling information sends uplink data to the first network device.

In a possible implementation manner, the receiving unit is further configured to: after the first sending unit sends the SRS indication information to the first network device, and after the second sending unit sends the SRS indication information in the In a first time interval, the SRS is transmitted using the first number of antennas, and in the second time interval, the SRS is received from the first network before the SRS is transmitted using the second number of antennas. Confirmation information of the device; wherein the confirmation information is used to indicate confirmation of the SRS indication information; or the confirmation information is used to indicate the first time interval and the second time interval; or the confirmation information Used to indicate that the SRS is transmitted using the first number of antennas during the first time interval, and the SRS is transmitted using the second number of antennas during the second time interval.

In a possible implementation manner, the first sending unit is further configured to resend the SRS indication information to the first network device if the confirmation information is not received; or, The second sending unit is further configured to send the SRS by using a third number of antennas when the confirmation information is not received.

In a possible implementation manner, the first sending unit is further configured to send the second terminal device to the first network without using the target antenna within the second time interval. The device sends a cancel instruction, where the cancel instruction is used to instruct the SRS to be sent using a third number of antennas.

In a fourth aspect, an embodiment of the present application provides a network device, including:

A first receiving unit, configured to receive SRS indication information of a sounding reference signal from a first terminal device; wherein the SRS indication information is used to indicate a first time interval and a second time interval, and the first time interval is a A time interval for sending SRS by a number of antennas, the second time interval is a time interval for sending the SRS using a second number of antennas, the first number is greater than the second number; a channel estimation unit is configured to Performing channel estimation by using the SRS indication information.

In a possible implementation manner, the network device further includes: a second receiving unit, configured to receive the SRS sent by the first terminal device within the first time interval using the first number of antennas The second receiving unit is further configured to receive the SRS sent by the first terminal device using the second number of antennas within a second time interval.

In a possible implementation manner, the network device further includes: a sending unit, configured to: after the first receiving unit receives the SRS indication information from the first terminal device, and after the second receiving unit The receiving unit receives the SRS transmitted by using the first number of antennas in the first time interval, and before the SRS transmitted by using the second number of antennas in the second time interval, The first terminal device sends confirmation information; wherein the confirmation information is used to indicate confirmation of the SRS indication information; or the confirmation information is used to indicate the first time interval and the second time interval; or, The confirmation information is used to indicate that the SRS is transmitted using the first number of antennas during the first time interval, and the second number of antennas is used to transmit the SRS during the second time interval. SRS.

In a possible implementation manner, the first receiving unit is further configured to receive the SRS indication information again when the sending unit does not send the confirmation information to the first terminal device; or The second receiving unit is further configured to receive, when the sending unit does not send the confirmation information to the first terminal device, the first terminal device using the third number of antennas to send the confirmation information SRS.

In a possible implementation manner, the first receiving unit is further configured to receive, from the first terminal device, when the second terminal device does not use the target antenna within the second time interval. A cancellation instruction by the terminal device, where the cancellation instruction is used to instruct the SRS to be sent using the third number of antennas.

In a fifth aspect, an embodiment of the present application further provides a terminal device. The terminal device may include a processor, a memory, and a transceiver. The memory may be used to store a program. The processor may be used to execute a memory stored in the memory. A program that, when the program is executed, enables the terminal device to implement the corresponding communication method in the first aspect; and the transceiver can be used to support communication between the terminal device and other network elements.

In a possible implementation manner, the memory may be a physically independent unit, or may be integrated with a processor.

According to a sixth aspect, an embodiment of the present application further provides a chip system including a processor, which is configured to support an application terminal device to implement the functions involved in the first aspect, for example, generating or processing the methods involved in the foregoing method. Information such as SRS instructions.

In a possible implementation manner, the chip system further includes a memory, where the memory is configured to store program instructions and data necessary for the terminal device.

For example, the chip system may be composed of chips, and may also include chips and other discrete devices.

In a seventh aspect, an embodiment of the present application further provides a network device, where the network device includes a processor, a memory, and a transceiver; the memory may be used to store a program; and the processor may be used to execute the memory stored in the memory. A program that, when the program is executed, enables the network device to implement the corresponding communication method in the second aspect; and the transceiver is configured to support communication between the network device and other network elements.

In an eighth aspect, an embodiment of the present application further provides a chip system including a processor, which is configured to support an application network device to implement the functions involved in the second aspect, for example, performing channel estimation.

In a possible implementation manner, the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the network device.

In a ninth aspect, an embodiment of the present application provides a computer-readable storage medium. The computer-readable storage medium stores instructions that, when run on a computer, cause the computer to execute the methods described in the foregoing aspects.

In a tenth aspect, an embodiment of the present application provides a computer program product including instructions, which when executed on a computer, causes the computer to execute the methods described in the foregoing aspects.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a DRX cycle of a secondary card; FIG.

2 is a schematic diagram of a communication system according to an embodiment of the present application;

3 is a schematic diagram of another communication system according to an embodiment of the present application;

4a is a schematic diagram of a channel estimation method according to an embodiment of the present application;

4b is a schematic diagram of another channel estimation method according to an embodiment of the present application;

5 is a schematic diagram of a circuit structure according to an embodiment of the present application;

6 is a schematic diagram of a scenario for sending SRS according to an embodiment of the present application;

7 is a schematic diagram of another circuit structure according to an embodiment of the present application;

8 is a schematic flowchart of a communication method according to an embodiment of the present application;

FIG. 9a is a schematic diagram of content of SRS indication information provided by an embodiment of the present application; FIG.

FIG. 9b is a schematic diagram of content of another SRS indication information provided by an embodiment of the present application; FIG.

FIG. 9c is a schematic diagram of a scene where frame boundaries are not aligned according to an embodiment of the present application; FIG.

10 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

11 is a schematic structural diagram of another terminal device according to an embodiment of the present application;

12 is a schematic structural diagram of still another terminal device according to an embodiment of the present application;

13 is a schematic structural diagram of a network device according to an embodiment of the present application;

14 is a schematic structural diagram of another network device according to an embodiment of the present application;

FIG. 15 is a schematic structural diagram of still another network device according to an embodiment of the present application.

detailed description

The embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The terms "first" and "second" in the specification, claims, and drawings of the present application are used to distinguish different objects and are not used to describe a specific order. Furthermore, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device containing a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes Other steps or units inherent to these processes, methods, products or equipment.

The communication system in the embodiment of the present application will be described in detail below.

The communication system applicable to the present application can also be understood as a wireless cellular communication system or a wireless communication system based on a cellular network architecture. For example, global mobile communications (GSM) systems, wideband code division multiple access (WCDMA) systems, long term evolution (LTE), and fifth-generation mobile communications (5th- generation, 5G) systems.

FIG. 2 is a schematic diagram of a communication system provided by an embodiment of the present application, and the solutions in the present application can be applied to the communication system. The communication system may include at least two network devices. As shown in FIG. 2, only two are shown in the figure, such as base stations eNB1 and eNB2 in the figure. And one or more terminal equipment (user equipment) (UE) connected to a network device, as shown in FIG. 2, UE11 and UE12 connected to eNB1, and UE21 and UE22 connected to eNB2.

Optionally, FIG. 3 is a schematic diagram of another communication system provided by an embodiment of the present application, and the solution in the present application may also be applied to the communication system. The communication system may include at least one network device, as shown in FIG. 3, and only one is shown in the figure, such as the base station eNB3 in the figure. And at least two UEs connected to the network device, as shown in FIG. 3, the UE 31 and the UE 32 connected to the eNB 3 in the figure.

The network device may be a device capable of communicating with the terminal device. The network device may be any device having a wireless transmitting and receiving function, including but not limited to a base station. For example, the base station may be a base station NodeB, or the base station may be an evolved base station (eNodeB), or the base station may be a next generation base station (gNB), or the base station may be a future communication system. Base station. Optionally, the network device may also be an access node, a wireless relay node, a wireless backhaul node, etc. in a wireless local area network (wireless fidelity, WiFi) system. Optionally, the network device may also be a wireless controller in a cloud radio access network (CRAN) scenario. Optionally, the network device may also be a wearable device or a vehicle-mounted device. Optionally, the network device may also be a small station, a transmission node (TRP), or the like. Of course, this application is not limited to this.

Terminal equipment can also be called user equipment. A terminal device is a device with wireless transceiver capabilities that can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on the water, such as a ship, etc .; it can also be deployed in the air, such as in By plane, balloon or satellite. The terminal device can be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, an industrial control (industrial control) ), Wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety , Wireless terminals in smart cities, wireless terminals in smart homes, and so on. The embodiment of this application does not limit the application scenario. A terminal device may also be referred to as a terminal device, an access terminal device, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a terminal, a wireless communication device, a UE agent, or a UE device.

It can be understood that, in the embodiment of the present application, when the first network device connected to the first terminal device and the second network device connected to the second terminal device are the same, the communication method provided in the embodiment of the present application can be applied to The communication system shown in FIG. 3. When the first network device is different from the second network device, the communication method provided in the embodiment of the present application may be applied to the communication system shown in FIG. 2. Furthermore, for example, if the first terminal device and the second terminal device belong to the same operator, the communication method provided in the embodiment of the present application can be applied to the communication system shown in FIG. 3, and the first terminal device and the second terminal device If the terminal equipment belongs to different operators, the communication method can be applied to the communication system shown in FIG. 2.

In the communication system shown in FIG. 2 and FIG. 3, when data needs to be transmitted between the base station and the UE, the UE needs to send an SRS to the base station, and the base station performs uplink channel estimation based on the received SRS. Then, the base station determines the port number that can be used by the UE for uplink data transmission and the precoding matrix used according to the result of the uplink channel estimation. Furthermore, the UE uses the precoding matrix to process the uplink data, and sends the corresponding uplink data on the antenna port corresponding to the port number. The uplink data includes voice, data packets of various applications, high-level signaling, and the like, which are not limited in this application. As shown in FIG. 4a, FIG. 4a is a schematic diagram of a channel estimation method according to an embodiment of the present application.

Understandably, in a time division duplex (TDD) system, since the uplink channel and the downlink channel have reciprocity, the base station can perform uplink channel estimation based on the received SRS, and then use the channel reciprocity to perform downlink. Channel estimation. Then, the base station determines a port number that can be used by the UE for downlink data transmission and a precoding matrix to be used according to a result of downlink channel estimation. Furthermore, the UE receives the corresponding downlink data on the antenna port corresponding to the port number, and uses the precoding matrix to process the downlink data. The downlink data includes voice, data packets of various applications, high-level signaling, and the like, which are not limited in this application. As shown in FIG. 4b, FIG. 4b is a schematic diagram of another channel estimation method according to an embodiment of the present application.

Further, in the LTE technology and the new wireless (new radio (NR)) technology, in order to enhance uplink transmission performance, an uplink antenna selection mechanism is introduced. As shown in FIG. 5, FIG. 5 is a schematic diagram of a circuit structure provided by an embodiment of the present application. As shown in FIG. 5, the circuit structure in the UE may include a baseband chip and a radio frequency (RF) link. Among them, when the UE needs to send data through the antenna, the baseband chip can be used to process the data and generate a baseband signal, and output the baseband signal to a radio frequency link. The form is sent outward.

Among them, a UE may be equipped with multiple antennas. In one implementation, a radio frequency link may be connected to one or more antennas through a switch. Because the channel status of different antennas to the base station may have a large difference (for example, when a handheld phone is used, the channel status of the antenna blocked by the hand is larger than that of the unblocked antenna). When transmitting signals, you can select an antenna with a better channel status to send.

This concludes the description of uplink antenna selection. At the same time, in order to screen out antennas with better channel status, the usual practice is to use different antennas to send SRS. For example, the UE sends SRS using different antennas in sequence. After receiving the SRS sent by the UE through different antennas, the base station performs channel estimation in order, and then selects the one with a better channel state. Furthermore, when the UE sends uplink data, it can use an antenna with a better channel state to send.

However, in practical applications, the terminal device often includes a primary card and a secondary card. That is, in the scenario described above, if the primary card uses different antennas to send SRS, and the base station is configured with the primary card to pass different The antenna sends SRS. For example, as shown in FIG. 6, the base station is configured to send SRS1 through antenna 1 and SRS2 through antenna 2. If the secondary card is in the active state of the idle state of the DRX cycle, the secondary card needs to be used. If the antenna is antenna 2, the main card cannot send SRS2 through antenna 2. At this time, if the main card uses antenna 1 to send SRS2 when SRS2 should be sent, the base station actually estimates the antenna when performing uplink channel estimation The channel state from 1 to the base station, but the base station mistakenly believes that it is the channel state from antenna 2 to the base station, which will cause the problem of inaccurate channel estimation.

Or, when the secondary card uses antenna 2, the primary card does not send SRS2. In this case, when the base station performs uplink channel estimation, the received noise signal or interference signal may be used as SRS2, which also causes inaccurate channel estimation. problem.

At the same time, if the first network device is different from the second network device, it will largely cause the first network device and the second network device to fail to communicate through the Xn interface such as X2 between the network devices. As a result, network devices cannot know each other's configuration in a timely manner.

Therefore, in order to solve the above problem, an embodiment of the present application provides a communication method, that is, when the first terminal device (including the primary card) finds that the second terminal device (the secondary card) needs to use an antenna, the first terminal device The SRS indication information can be sent to the first network device, so that the first network device knows the antenna condition used by the first terminal device in time, so that on the one hand, the UE can send SRS normally, and on the other hand, it can improve the accuracy of the base station channel estimation. Sex.

Before introducing the communication method provided by the embodiment of the present application, refer to FIG. 7, which is a schematic diagram of another circuit structure provided by the embodiment of the present application. As shown in FIG. 7, the circuit structure includes a baseband chip and at least two The radio frequency link is a first radio frequency link and a second radio frequency link. Specifically, the first terminal device may use the first radio frequency link to send and / or receive data, signaling, etc., and the second terminal device may use the second radio frequency link to send and / or receive data, signaling, etc. That is, when the first terminal device needs to send data through the antenna, the baseband chip outputs the generated baseband signal to the first radio frequency link, and the first radio frequency link performs radio frequency processing on the baseband signal and sends it out. When the second terminal device needs to send data through the antenna, the baseband chip outputs the generated baseband signal to a second radio frequency link, and the second radio frequency link performs radio frequency processing on the baseband signal and sends it out.

It can be understood that the first terminal device may be UE11 (or UE12) shown in FIG. 2, and the second terminal device may be UE21 (or UE22) shown in FIG. 2. Alternatively, the first terminal device may also be UE31 shown in FIG. 3, and the second terminal device may also be UE32 shown in FIG.

FIG. 8 is a schematic flowchart of a communication method according to an embodiment of the present application. The communication method may be applied to the communication system shown in FIG. 2 or FIG. 3. As shown in FIG. 8, the communication method includes:

801. A first terminal device sends probe reference signal SRS indication information to a first network device, and the first network device receives the SRS indication information from the first terminal device.

The SRS indication information is used to indicate a first time interval and a second time interval, where the first time interval is a time interval for sending SRS using a first number of antennas, and the second time interval is a time interval for sending SRS using a second number of antennas. Time interval, the first number is greater than the second number.

In the embodiment of the present application, the first time interval may correspond to the sleep period of the idle state of the DRX cycle of the second terminal device, that is, the off period shown in FIG. 1. The second time interval may correspond to the active period of the idle state of the DRX cycle of the second terminal device, that is, corresponds to the on cycle shown in FIG. 1. Further, since the second terminal device is in the off period in the first time interval, it does not need to use an antenna, and because the second terminal device is in the on period in the second time interval, it needs to use at least one antenna such as a target antenna. The target antenna belongs to the antenna in the first number of antennas, but does not belong to the antenna in the second number of antennas. Optionally, the target antenna may be one antenna or multiple antennas. Therefore, when the first terminal device should originally use the first number of antennas to send the SRS, the SRS can only send the SRS through the second number of antennas, where the first number is greater than the second number.

Understandably, in a case where the first network device and the second network device are different, specifically, in a case where the first network device and the second network device belong to different operators, the first network device and the second network The time between the devices may not be synchronized. For example, if the frame boundaries, subframe boundaries, slot boundaries, symbol boundaries, and so on of the first network device and the second network device are not aligned, the second time interval may be between the first network device and the second network device. Time difference, the time interval obtained after compensation. And the first time interval may also be a time interval obtained after compensation according to a time difference between the first network device and the second network device.

It can be understood that when the second terminal device is in the on cycle, because the second terminal device needs to listen to a paging message, etc., it has a relatively high priority, and thus the second terminal device can use an antenna.

Specifically, the first terminal device may include the first time interval and the second time interval in the SRS indication information in an explicit manner, or the first terminal device may also indicate the first time interval and the first time interval in an implicit manner. Two time intervals. For example, the SRS indication information may include the time sum of the first time interval and the second time interval, and the first time interval, or the SRS indication information may further include the first time interval and the second time interval. Time sum, and second time interval. As for the specific method used to indicate the first time interval and the second time interval, the embodiment of the present application does not limit it uniquely.

In the embodiment of the present application, the first terminal device and the first network device may pre-set or pre-negotiate antennas that can be used by the second terminal device, so that the first terminal device indicates the first time interval and the second network device to the first network device. In the time interval, the first network device can learn the use of the antenna by the first terminal device and the second terminal device.

Optionally, in the embodiment of the present application, the SRS indication information may also be used to indicate that the SRS is transmitted using the first number of antennas in the first time interval, and the SRS is transmitted using the second number of antennas in the second time interval.

That is, the SRS indication information may further include an antenna state used by the first terminal device.

It can be understood that, in the embodiment of the present application, the first terminal device may also be used to transmit SRS using the first number of antennas in the first time interval to be divided into the normal capabilities of the first terminal device, and will be within the second time interval. , Sending the SRS using the second number of antennas is divided into a fallback capability of the first terminal device. Therefore, when the first terminal device sends the SRS indication information to the first network device, the SRS indication information includes the normal capability and the fallback capability.

Specifically, the first terminal device may also send SRS indication information to the first network device through radio resource control (radio resource control (RRC) signaling).

In order to describe the SRS indication information more vividly, a specific example is used as an illustration below.

As shown in FIG. 9a, FIG. 9a is a schematic diagram of content of SRS indication information provided by an embodiment of the present application. In the figure, sf40, sf64, sf80, sf128, sf160 and sf256 can be used to represent Time sum, for example, the time sum can be expressed as 40ms, 64ms ... 256ms and so on. In the figure, sf20, sf30, sf40, sf60, sf80, and sf100 may represent a first time interval or a second time interval. For example, the first time interval or the second time interval may be 20 ms. And 0 ... 255 can represent the offset. For example, if the time sum is 40ms and the first time interval is 20ms, for example, if the offset is 0, it means that within the 40ms time interval, the first 20ms is the first time interval. For another example, the offset is 10, which means that within the time interval of 40ms, the time interval from the 10th to 30ms is the first time interval.

It can be understood that the numbers in sf40, sf20, etc. can also be expressed as subframes, frames, time slots, or the number of matches, which are not limited in the embodiments of the present application.

As shown in FIG. 9b, FIG. 9b is a schematic diagram of content of another SRS indication information provided by an embodiment of the present application. In the figure, firstcapability may indicate normal capability, or may be referred to as first capability (that is, normal capability). The secondcapability in the figure may represent a rollback capability, or may be referred to as a second capability. The first network device is instructed to the first time interval, the second time interval, the normal capability, and the fallback capability, so that the first network device learns the use of the antenna by the first terminal device and the second terminal device.

As shown in FIG. 9c, FIG. 9c is a schematic diagram of a scenario where frame boundaries are not aligned according to an embodiment of the present application. The frame corresponding to the on period of the second terminal device (sub card) in the figure may be the fifth frame to the ninth frame. Frame, and the frame boundary corresponding to the first terminal device (master card) is the first frame to the fifth frame. Therefore, when the first time interval and the second time interval in the SRS indication information are reported in frame units, the second time interval in the SRS indication information sent by the first terminal device to the first network device may be " From the first frame to the fifth frame, the SRS is transmitted using the second number of antennas ". In other words, the first terminal device cannot directly use "from the fifth frame to the ninth frame, send the SRS using the second number of antennas".

It can be understood that the above is only an example, and should not be construed as limiting the embodiments of the present application.

It can be understood that after the first terminal device sends the SRS instruction information to the first network device, the first terminal device can directly perform step 802 without the first network device having to send confirmation information to the first terminal device. However, in the case that the first terminal device needs to be approved by the first network device before the first terminal device can perform step 802, reference may be made to the following embodiment.

That is, after step 801 and before step 802, the communication method provided in the embodiment of the present application may further include:

811. The first network device sends confirmation information to the first terminal device, and the first terminal device receives the confirmation information from the first network device.

Specifically, the confirmation information may include the following three methods:

method one,

The confirmation information may be used to indicate confirmation of the SRS indication information, that is, the confirmation information may be used to explicitly indicate that the first network device has confirmed the SRS indication information.

Way two,

The confirmation information may be used to indicate the first time interval and the second time interval. That is, the confirmation information may include the first time interval and the second time interval, or the confirmation information may further include the time sum of the first time interval and the second time interval, and the first time interval, or, The confirmation information may further include the time sum of the first time interval and the second time interval, and the second time interval. That is, the confirmation information can be used to implicitly indicate that the first network device has confirmed the SRS indication information.

Way three,

The confirmation information may be used to indicate that the SRS is transmitted using the first number of antennas in the first time interval, and the SRS is transmitted using the second number of antennas in the second time interval. That is, the confirmation information may also include normal capabilities and fallback capabilities. That is, the confirmation information can be used to implicitly indicate that the first network device has confirmed the SRS indication information.

It can be understood that the above are only three ways of confirming the information, and the three ways shown above should not be understood as limiting the embodiments of the present application.

In the embodiment of the present application, in order to further improve the efficiency of interaction between the first terminal device and the first network device, the first terminal device may use the first time interval in the first time interval after receiving the confirmation information sent by the first network device. The number of antennas to send the SRS, and the second number of antennas to send the SRS in the second time interval, so that the first network device can accurately determine how to perform channel estimation, thereby further improving the accuracy of the channel estimation by the first network device .

It can be understood that the first number of antennas and the second number of antennas described in the embodiments of the present application can be implemented through physical antennas or through logical antenna ports. For example, the SRS indication information may also be used to indicate that a fourth number of antenna ports are used to send SRS in the first time interval, and a second number of antenna ports are used to send SRS in the second time interval. The fourth number is greater than the fifth number.

Specifically, each RF link and antenna combination can represent a signal path. When the channel characteristics of the two paths can be distinguished from each other, it can be logically divided into two different antenna ports. And in hardware implementation, the interval between different antennas is generally greater than 0.5 times the electromagnetic wave wavelength, so that the two antennas can be distinguished. Therefore, in general, a combination of an RF link and an antenna can be considered to correspond to an antenna port. It can be understood that the above is the description of the antenna port. In the specific implementation, there may be other descriptions. Therefore, the embodiment of the present application does not limit how the antenna port is specifically limited.

802. The first terminal device uses a first number of antennas to send SRS in a first time interval, and the first terminal device uses a second number of antennas to send SRS in a second time interval; and the first network device receives the first The terminal device uses the SRS sent by the first number of antennas in the first time interval, and the first network device receives the SRS sent by the first terminal device using the second number of antennas in the second time interval.

803. The first network device performs channel estimation according to the SRS indication information.

In the embodiment of the present application, it is assumed that the first network device configures the first terminal device to send a SRS using a third number of antennas, where the third number may be the same as the first number or different from the first number. Not limited. After the first network device is configured, the first terminal device sends the SRS indication information to the first network device, and then the first terminal device can perform step 802. At this time, the first network device can perform the latest use according to the first terminal device. The state of the antenna to perform channel estimation improves the accuracy of the channel estimation and prevents the first network device from still performing channel estimation according to the original configuration.

804. The first network device determines uplink scheduling information.

Specifically, the uplink scheduling information may include at least a port number, a precoding matrix, and the like. The embodiment of the present application does not limit the specific content included in the uplink scheduling information.

805. The first network device sends uplink scheduling information to the first terminal device, and the first terminal device receives uplink scheduling information from the first network device.

806. The first terminal device sends uplink data to the first network device according to the uplink scheduling information.

Implementation of the embodiments of the present application can effectively improve the accuracy of channel estimation of the first network device.

It can be understood that the communication method shown in FIG. 8 can also be applied to a TDD system, that is, according to the reciprocity of the uplink channel and the downlink channel, the first network device can use the channel after receiving the SRS sent by the first terminal device. Reciprocity performs downlink channel estimation. Specifically, a method for performing channel estimation may be shown in FIG. 4b, which is not described in detail here. That is, after the first network device receives the SRS indication information from the first terminal device, and after the SRS, the first network device can not only perform uplink channel estimation but also downlink channel estimation, thereby determining downlink scheduling information, and further After sending the downlink scheduling information to the first terminal device, downlink data can be sent to the first terminal device.

Optionally, when the first terminal device receives the confirmation information from the first network device, the first terminal device may perform step 802. However, the first terminal device may also not receive the confirmation information. One reason may be that the first network device does not receive the SRS indication information, and another reason may be that the first network device does not want to confirm the SRS indication information. . Therefore, after the first terminal device sends the SRS indication information to the first network device, the foregoing method further includes the following two scenarios:

scene one,

When the first terminal device does not receive the confirmation information from the first network device, the first terminal device re-sends the SRS instruction information to the first network device.

For this scenario, the first terminal device may re-send the SRS indication information to the first network device to avoid a situation where the first network device does not receive the SRS indication information.

Scene two,

In the case that the first terminal device does not receive the confirmation information from the first network device, the first terminal device uses a third number of antennas to send the SRS.

For this scenario, the first terminal device may use an antenna using the original configuration, such as sending a SRS using a third number of antennas.

In the embodiment of the present application, if the first terminal device does not receive the confirmation information, it is likely that the first network device does not receive the SRS instruction information, and therefore the first terminal device may resend the SRS instruction information. Or, in the case that the first terminal device does not receive the confirmation information, it is likely that the first network device has not confirmed the SRS indication information, so the first terminal device may use the original configuration, such as a third quantity. The antenna sends SRS. Therefore, the interaction efficiency between the first terminal device and the first network device can be improved.

Optionally, after the first terminal device sends the SRS indication information to the first network device, the second terminal device may be in an emergency or prominent state, resulting in that the second terminal device does not need to use the target antenna. Therefore, in After the first terminal device sends the SRS indication information to the first network device, the method further includes:

In the second time interval, when the second terminal device does not use the target antenna, the first terminal device sends a cancellation instruction to the first network device, and the cancellation instruction may be used to instruct the third number of antennas to send the SRS.

In the embodiment of the present application, the first terminal device sending the cancellation instruction to the first network device may indicate that the second terminal device does not need to use the target antenna, and may also indicate that the first terminal device may use the target antenna in the second time interval. SRS sent. That is, the cancellation instruction may be used to instruct the first network device, and the first terminal device may send the SRS using the original configuration.

It can be understood that the method provided in the embodiment of the present application may be after step 801, or after step 802, and so on, and the embodiment of the present application is not limited.

It can be understood that, in the communication method provided in the embodiment of the present application, SRSs transmitted through different antennas may also be referred to as different SRSs. For example, if the first number of antennas includes the first antenna and the second antenna, the The SRS transmitted by one antenna may be referred to as a first SRS, and the SRS transmitted through a second antenna is referred to as a second SRS. That is, if the SRS transmitted through the first number of antennas is referred to as the first number of SRSs, and the SRS transmitted through the second number of antennas is referred to as the second number of SRSs, the first number of SRSs and The second number of SRSs are collectively referred to as SRS and so on. The embodiment of the present application does not limit whether the SRSs sent through different antennas are the same. Therefore, the SRS in the communication method shown in FIG. 8 should not be understood as limiting the embodiments of the present application.

The foregoing describes the method in the embodiment of the present application in detail, and the apparatus in the embodiment of the present application is provided below.

FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device may be used to execute the communication method shown in FIG. 8. As shown in FIG. 10, the terminal device includes:

A first sending unit 1001 is configured to send sounding reference signal SRS indication information to a first network device, where the SRS indication information is used to indicate a first time interval and a second time interval, and the first time interval is to use a first quantity The time interval during which the SRS is transmitted by the antenna, the second time interval is the time interval during which the SRS is transmitted using a second number of antennas, and the first number is greater than the second number.

Specifically, the SRS indication information is also used to indicate that the SRS is transmitted using the first number of antennas in the first time interval, and the SRS is transmitted using the second number of antennas in the second time interval.

Optionally, as shown in FIG. 11, the terminal device further includes:

A second sending unit 1002, configured to send an SRS using a first number of antennas within a first time interval;

The second sending unit 1002 is further configured to send the SRS by using a second number of antennas within a second time interval;

A receiving unit 1003, configured to receive uplink scheduling information from a first network device;

The first sending unit 1001 is further configured to send uplink data to the first network device according to the uplink scheduling information.

Specifically, the receiving unit 1003 is further configured to send the SRS using the first number of antennas after the first sending unit 1001 sends the SRS indication information to the first network device, and within the first time interval of the second sending unit 1002, And within a second time interval, before receiving the SRS using the second number of antennas, receiving confirmation information from the first network device; wherein the confirmation information is used to indicate confirmation of the SRS instruction information; or the confirmation information is used for Indicating the first time interval and the second time interval; or, the confirmation information is used to indicate that the SRS is transmitted using the first number of antennas within the first time interval, and within the second time interval, The SRS is transmitted using the second number of antennas.

Optionally, the first sending unit 1001 is further configured to resend the SRS indication information to the first network device if the confirmation information is not received;

Alternatively, the second sending unit 1002 is further configured to use a third number of antennas to send the SRS if the confirmation information is not received.

Specifically, the second time interval includes an idle state activation period of the DRX cycle of the discontinuous reception of the second terminal device; the second terminal device is a terminal device using a target antenna in the second time interval, and the target antenna is Antennas belonging to the first number of antennas, but not antennas of the second number of antennas.

The first sending unit 1001 is further configured to send a cancellation instruction to the first network device in the second time interval when the second terminal device does not use the target antenna, and the cancellation instruction is used to instruct to send using a third number of antennas. SRS.

Specifically, the second time interval includes a time interval obtained after compensation according to a time difference between the first network device and the second network device; the second network device is a network device connected to the second terminal device.

It can be understood that, for specific implementation manners of the terminal devices shown in FIG. 10 and FIG. 11, reference may be made to the description of the communication method shown in FIG. 8, which will not be detailed one by one here.

FIG. 12 is a schematic structural diagram of a terminal device 1200 according to an embodiment of the present application. The terminal device may perform operations of the terminal device in the method shown in FIG. 8, or the terminal device may also perform operations of the terminal device shown in FIG. 10 and FIG. 11.

For convenience of explanation, FIG. 12 shows only the main components of the terminal device. As shown in FIG. 12, the terminal device 1200 includes a processor, a memory, a radio frequency link, an antenna, and an input / output device. The processor is mainly used to process the communication protocol and communication data, and control the entire terminal device, execute a software program, and process the data of the software program, for example, to support the terminal device to execute the process described in FIG. 8. The memory is mainly used for storing software programs and data. The radio frequency link is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. The terminal device 1200 may further include input / output devices, such as a touch screen, a display screen, and a keyboard, which are mainly used to receive data input by the user and output data to the user. It should be noted that some types of terminal equipment may not have an input / output device.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the software program, and process the data of the software program. When the data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency link. After the radio frequency link processes the baseband signal, the radio frequency signal is sent out as an electromagnetic wave through the antenna. When data is sent to the terminal device, the RF link receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. .

It may be understood that the radio frequency link shown in FIG. 12 may include at least two radio frequency links, for example, may include a first radio frequency link and a second radio frequency link. That is, the radio frequency link may include the radio frequency link in the schematic diagram shown in FIG. 7.

Those skilled in the art can understand that, for ease of description, FIG. 12 shows only one memory and a processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, which is not limited in the embodiment of the present application.

As an optional implementation, the processor may include a baseband processor and a central processing unit (CPU). The baseband processor is mainly used to process communication protocols and communication data, and the CPU is mainly used to process the entire terminal. The device controls, executes the software program, and processes the data of the software program. Optionally, the processor may be a network processor (NP) or a combination of a CPU and an NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof. The memory may include volatile memory (for example, random-access memory (RAM); the memory may also include non-volatile memory (for example, flash memory) , Hard disk (HDD) or solid-state drive (SSD); the storage may also include a combination of the above types of storage.

Exemplarily, in the embodiment of the application, the antenna and the radio frequency link having a transmitting and receiving function may be regarded as the transmitting and receiving unit 1201 of the terminal device 1200 and the processor having the processing function may be regarded as the processing unit 1202 of the terminal device 1200. As shown in FIG. 12, the terminal device 1200 includes a transceiver unit 1201 and a processing unit 1202. The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, and the like. Optionally, a device used to implement the receiving function in the transceiver unit 1201 may be regarded as a receiving unit, and a device used to implement the transmitting function in the transceiver unit 1201 may be regarded as a transmitting unit, that is, the transceiver unit 1201 includes a receiving unit and a transmitting unit. Exemplarily, the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc., and the sending unit may be called a transmitter, a transmitter, or a transmitting circuit.

For example, in one embodiment, the transceiver unit 1201 may be configured to execute the method performed by the first sending unit 1001 shown in FIG. 10. As another example, the transceiver unit 1201 may be configured to execute the method performed by the second sending unit 1002 and the receiving unit 1003 shown in FIG. 11.

It can be understood that, for implementation manners of the terminal device in the embodiments of the present application, reference may be made to the foregoing embodiments, and details are not described herein again.

FIG. 13 is a schematic structural diagram of a network device according to an embodiment of the present application. The network device may be used to execute the communication method shown in FIG. 8. As shown in FIG. 13, the network device includes:

A first receiving unit 1301 is configured to receive SRS indication information of a sounding reference signal from a first terminal device, where the SRS indication information is used to indicate a first time interval and a second time interval, and the first time interval is the first time interval used. A time interval for sending SRS by a number of antennas, the second time interval being a time interval for sending the SRS using a second number of antennas, the first number being greater than the second number;

A channel estimation unit 1302 is configured to perform channel estimation according to the SRS indication information.

Optionally, as shown in FIG. 14, the network device further includes:

A second receiving unit 1303, configured to receive an SRS sent by a first terminal device using a first number of antennas within a first time interval;

The second receiving unit 1303 is further configured to receive the SRS sent by the first terminal device using a second number of antennas within a second time interval.

Optionally, as shown in FIG. 14, the network device further includes:

The sending unit 1304 is configured to use the first number of antennas after the first receiving unit 1301 receives the SRS indication information from the first terminal device, and after the second receiving unit 1303 receives the SRS indication information in the first time interval. Sending the SRS, within a second time interval, before sending the SRS using the second number of antennas, sending confirmation information to the first terminal device; wherein the confirmation information is used to indicate confirmation of the SRS instruction information; or , The confirmation information is used to indicate the first time interval and the second time interval; or, the confirmation information is used to indicate that the SRS is transmitted using the first number of antennas in the first time interval, and In the two time intervals, the SRS is transmitted using the second number of antennas.

Optionally, the first receiving unit 1301 is further configured to receive the SRS indication information again when the sending unit 1304 does not send confirmation information to the first terminal device;

Alternatively, the second receiving unit 1303 is further configured to receive the SRS sent by the first terminal device using a third number of antennas when the sending unit 1304 does not send the confirmation information to the first terminal device.

Optionally, the first receiving unit 1301 is further configured to receive a cancellation instruction from the first terminal device in the second time interval without using the target antenna, and the cancellation instruction Used to indicate that the SRS is transmitted using the third number of antennas.

It can be understood that, for specific implementations of the network devices shown in FIG. 13 and FIG. 14, reference may be made to the description of the method shown in FIG. 8, which will not be detailed one by one here.

FIG. 15 is a schematic structural diagram of a network device 1500 according to an embodiment of the present application. The network device may perform operations of the network device in the method shown in FIG. 8, or the network device may also perform operations of the network device shown in FIG. 13 and FIG. 14.

The network device 1500 includes one or more remote radio unit (RRU) 1501 and one or more baseband unit (BBU) 1502. The above-mentioned RRU 1501 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 1511 and a radio frequency unit 1512. The above-mentioned RRU1501 part is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals to baseband signals. For example, it can be used to receive RSR indication information, SRS, and so on. The above BBU1502 part is mainly used for baseband processing and controlling network equipment. The above-mentioned RRU1501 and BBU1502 may be physically located together or physically separated, that is, distributed network equipment.

The above BBU1502 is a control center of a network device, and may also be referred to as a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, and so on. For example, the BBU (processing unit) may be used to control a network device to perform

steps

803 and 804 shown in FIG. 8 and the like.

In one example, the above BBU1502 may be composed of one or more boards, and multiple boards may jointly support a wireless access network (such as an LTE network) of a single access system, or may separately support wireless access of different access systems. Go online. The BBU 1502 also includes a memory 1521 and a processor 1522. The memory 1521 is used to store necessary messages and data. The processor 1522 is configured to control a network device to perform a necessary action, for example, to control the network device to perform a corresponding operation shown in FIG. 8. The memory 1521 and the processor 1522 may serve one or more boards. That is, the memory and processor can be set separately on each board. It may also be that multiple boards share the same memory and processor. In addition, the necessary circuits are provided on each board. Optionally, the processor may be a CPU, an NP, or a combination of a CPU and an NP. The processor may further include a hardware chip. The above hardware chip may be an ASIC, a PLD, or a combination thereof. The PLD may be a CPLD, an FPGA, a GAL, or any combination thereof. The memory may include a volatile memory, such as a RAM; the memory may also include a non-volatile memory, such as a flash memory, a hard disk, or a solid state hard disk; the memory may also include a combination of the above types of memories.

It can be understood that, for implementation manners of the network device in the embodiments of the present application, reference may be made to the foregoing embodiments, and details are not described herein again.

A person of ordinary skill in the art may understand that all or part of the processes in the method of the foregoing embodiments are implemented. The processes may be completed by a computer program instructing related hardware. The program may be stored in a computer-readable storage medium. When the program is executed, Can include the processes of the method embodiments described above. The foregoing storage medium includes: a read-only memory (ROM) or a random access memory (RAM), a magnetic disk, or an optical disk, which can store various program codes.

Claims

A communication method, comprising:

The first terminal device sends detection reference signal SRS indication information to the first network device, where the SRS indication information is used to indicate a first time interval and a second time interval, and the first time interval is the use of a first number of antennas A time interval for sending SRS, the second time interval is a time interval for sending the SRS using a second number of antennas, and the first number is greater than the second number.
The method according to claim 1, wherein the SRS indication information is further used to indicate that the SRS is transmitted using the first number of antennas in the first time interval, and in the second time interval The SRS is transmitted using the second number of antennas.
The method according to claim 1 or 2, further comprising:

Sending, by the first terminal device, the SRS using the first number of antennas within a first time interval;

Sending, by the first terminal device, the SRS using the second number of antennas within a second time interval;

Receiving, by the first terminal device, uplink scheduling information from a first network device;

Sending, by the first terminal device, uplink data to the first network device according to the uplink scheduling information.
The method according to claim 3, wherein after the first terminal device sends the sounding reference signal SRS indication information to the first network device, and after the first terminal device is in a first time interval, using Before the first number of antennas sends the SRS, and before the first terminal device uses the second number of antennas to send the SRS within a second time interval, the method further includes:

Receiving, by the first terminal device, confirmation information from the first network device; wherein the confirmation information is used to indicate confirmation of the SRS indication information; or the confirmation information is used to indicate the first time interval and The second time interval; or the confirmation information is used to indicate that the SRS is transmitted using the first number of antennas during the first time interval, and using the The second number of antennas transmits the SRS.
The method according to claim 4, further comprising:

When the first terminal device does not receive the confirmation information, the first terminal device sends the SRS indication information to the first network device again;

Alternatively, when the first terminal device does not receive the confirmation information, the first terminal device sends the SRS by using a third number of antennas.
The method according to any one of claims 1 to 5, wherein the second time interval includes an idle period of a discontinuous reception DRX cycle of the second terminal device, and the second terminal device is at A terminal device using a target antenna in the second time interval, the target antenna is an antenna belonging to the first number of antennas, but not an antenna among the second number of antennas.
The method according to claim 6, further comprising:

Within the second time interval, when the second terminal device does not use the target antenna, the first terminal device sends a cancellation instruction to the first network device, and the cancellation instruction is used to indicate use The third number of antennas transmits the SRS.
The method according to any one of claims 1 to 7, wherein the second time interval comprises a time interval obtained after compensation according to a time difference between the first network device and the second network device; The second network device is a network device connected to the second terminal device.
A communication method, comprising:

The first network device receives SRS indication information of a sounding reference signal from a first terminal device, where the SRS indication information is used to indicate a first time interval and a second time interval, and the first time interval is a first quantity of A time interval for transmitting SRS by the antenna, the second time interval is a time interval for transmitting the SRS by using a second number of antennas, and the first number is greater than the second number;

Performing channel estimation by the first network device according to the SRS indication information.
The method according to claim 9, wherein the SRS indication information is further used to indicate that the SRS is transmitted using the first number of antennas in the first time interval, and in the second time interval The SRS is transmitted using the second number of antennas.
The method according to claim 9 or 10, further comprising:

Receiving, by the first network device, the SRS sent by the first terminal device using the first number of antennas within a first time interval;

Receiving, by the first network device, the SRS sent by the first terminal device using the second number of antennas within a second time interval.
The method according to claim 11, wherein after the first network device receives the SRS indication information from the first terminal device, and the first network device receives the first terminal device in the first In a time interval, using the SRS sent by the first number of antennas, the first network device receives all data sent by the first terminal device using the second number of antennas in a second time interval. Prior to the SRS, the method further includes:

Sending, by the first network device, confirmation information to the first terminal device; wherein the confirmation information is used to indicate confirmation of the SRS indication information; or the confirmation information is used to indicate the first time interval and all information The second time interval; or the confirmation information is used to indicate that the SRS is transmitted using the first number of antennas during the first time interval, and that the SRS is used during the second time interval A second number of antennas transmit the SRS.
The method according to claim 12, further comprising:

If the first network device does not send the confirmation information to the first terminal device, the first network device receives the SRS indication information again;

Alternatively, when the first network device does not send the confirmation information to the first terminal device, the first network device receives the SRS sent by the first terminal device using a third number of antennas .
The method according to any one of claims 9 to 13, characterized in that the second time interval includes an idle period of a discontinuous reception DRX cycle of the second terminal device, and the second terminal device is at A terminal device using a target antenna in the second time interval, the target antenna is an antenna belonging to the first number of antennas, but not an antenna among the second number of antennas.
The method according to claim 14, further comprising:

Within the second time interval, when the second terminal device does not use the target antenna, the first network device receives a cancellation instruction from the first terminal device, and the cancellation instruction is used to indicate The SRS is transmitted using the third number of antennas.
The method according to any one of claims 9 to 15, wherein the second time interval comprises a time interval obtained after compensation according to a time difference between the first network device and the second network device; The second network device is a network device connected to the second terminal device.
A terminal device, comprising:

A first sending unit, configured to send sounding reference signal SRS indication information to a first network device; wherein the SRS indication information is used to indicate a first time interval and a second time interval, and the first time interval is to use the first time interval The number of antennas transmits a time interval of the SRS, and the second time interval is a time interval of transmitting the SRS using a second number of antennas, and the first number is greater than the second number.
The terminal device according to claim 17, wherein the SRS indication information is further used to indicate that the SRS is transmitted using the first number of antennas in the first time interval, and at the second time Within the interval, the SRS is transmitted using the second number of antennas.
The terminal device according to claim 17 or 18, wherein the terminal device further comprises:

A second sending unit, configured to send the SRS using the first number of antennas within a first time interval;

The second sending unit is further configured to send the SRS using the second number of antennas within a second time interval;

A receiving unit, configured to receive uplink scheduling information from a first network device;

The first sending unit is further configured to send uplink data to the first network device according to the uplink scheduling information.
The terminal device according to claim 19, wherein

The receiving unit is further configured to use the SRS indication information after the first sending unit sends to the first network device, and use the second sending unit within the first time interval. A first number of antennas transmitting the SRS, and within the second time interval before receiving the SRS using the second number of antennas, receiving confirmation information from the first network device; wherein the The confirmation information is used to indicate confirmation of the SRS instruction information; or the confirmation information is used to indicate the first time interval and the second time interval; or the confirmation information is used to indicate that the Within the interval, the SRS is transmitted using the first number of antennas, and within the second time interval, the SRS is transmitted using the second number of antennas.
The terminal device according to claim 20, wherein:

The first sending unit is further configured to resend the SRS indication information to the first network device if the confirmation information is not received;

Alternatively, the second sending unit is further configured to send the SRS by using a third number of antennas when the confirmation information is not received.
The terminal device according to any one of claims 17 to 21, wherein the second time interval includes an idle period of a discontinuous reception DRX cycle of the second terminal device, and the second terminal device is A terminal device using a target antenna in the second time interval, the target antenna is an antenna belonging to the first number of antennas, but not an antenna among the second number of antennas.
The terminal device according to claim 22, wherein

The first sending unit is further configured to send a cancellation instruction to the first network device during the second time interval without using the target antenna by the second terminal device, and the cancellation instruction Used to indicate that the SRS is transmitted using a third number of antennas.
The terminal device according to any one of claims 17 to 23, wherein the second time interval comprises a time interval obtained after compensation according to a time difference between the first network device and the second network device The second network device is a network device connected to the second terminal device.
A network device, comprising:

A first receiving unit, configured to receive SRS indication information of a sounding reference signal from a first terminal device; wherein the SRS indication information is used to indicate a first time interval and a second time interval, and the first time interval is a A time interval for sending SRS by a number of antennas, the second time interval being a time interval for sending the SRS using a second number of antennas, the first number being greater than the second number;

A channel estimation unit is configured to perform channel estimation according to the SRS indication information.
The network device according to claim 25, wherein the SRS indication information is further used to indicate that the SRS is transmitted using the first number of antennas in the first time interval, and at the second time Within the interval, the SRS is transmitted using the second number of antennas.
The network device according to claim 25 or 26, wherein the network device further comprises:

A second receiving unit, configured to receive the SRS sent by the first terminal device using the first number of antennas within a first time interval;

The second receiving unit is further configured to receive the SRS sent by the first terminal device using the second number of antennas within a second time interval.
The network device according to claim 27, wherein the network device further comprises:

A sending unit, configured to use the first receiving unit after the first receiving unit receives the SRS indication information from the first terminal device, and after the second receiving unit receives the SRS indication information within the first time interval; The SRS sent by a number of antennas sends confirmation information to the first terminal device within the second time interval before using the SRS sent by the second number of antennas; wherein the confirmation information is used Confirming the SRS instruction information with an instruction; or the confirmation information is used to indicate the first time interval and the second time interval; or the confirmation information is used to indicate that it is within the first time interval, The SRS is transmitted using the first number of antennas, and the SRS is transmitted using the second number of antennas during the second time interval.
The network device according to claim 28, wherein:

The first receiving unit is further configured to re-receive the SRS indication information if the sending unit does not send the confirmation information to the first terminal device;

Alternatively, the second receiving unit is further configured to receive all the data sent by the first terminal device using a third number of antennas when the sending unit does not send the confirmation information to the first terminal device. Said SRS.
The network device according to any one of claims 25 to 29, wherein the second time interval includes an idle period of a discontinuous reception DRX cycle of the second terminal device, and the second terminal device is A terminal device using a target antenna in the second time interval, the target antenna is an antenna belonging to the first number of antennas, but not an antenna among the second number of antennas.
The network device according to claim 30, wherein:

The first receiving unit is further configured to receive a cancellation instruction from the first terminal device during the second time interval without using the target antenna by the second terminal device. The instruction is used to instruct the SRS to be transmitted using the third number of antennas.
The network device according to any one of claims 25 to 31, wherein the second time interval comprises a time interval obtained after compensation according to a time difference between the first network device and the second network device The second network device is a network device connected to the second terminal device.
A terminal device, comprising: a processor, a memory, and a transceiver; the processor, the memory, and the transceiver are interconnected through a line, and the memory stores program instructions; the program instructions are When the processor executes, the terminal device is caused to execute a corresponding function in the method according to any one of claims 1 to 8.
A network device is characterized by comprising: a processor, a memory, and a transceiver; the processor, the memory, and the transceiver are interconnected through a line, and the memory stores program instructions; the program instructions are When the processor executes, the network device is caused to execute a corresponding function in the method according to any one of claims 9 to 16.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores program instructions, and when the program instructions are executed by a processor of a terminal device, cause the processor to execute the instructions according to claims 1 to 8 The method of any one.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores program instructions, and when the program instructions are executed by a processor of a network device, the processor causes the processor to execute the instructions according to claims 9 to 16 The method of any one.