CN112422245B

CN112422245B - Method and device for sending and receiving indication

Info

Publication number: CN112422245B
Application number: CN201910783828.1A
Authority: CN
Inventors: 范利; 种稚萌; 毕晓艳; 葛士斌; 金黄平; 尹海帆; 刘永
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2022-04-22
Anticipated expiration: 2039-08-23
Also published as: CN112422245A; WO2021036934A1

Abstract

In order to enable a terminal to acquire special sending ports needing to be considered or processed in a targeted manner, network equipment sends indication information to the terminal, wherein the indication information is used for indicating one or more special sending ports of a downlink reference signal, the special sending ports are sending ports of subcarriers meeting a preset condition in subcarriers occupied by the sending ports of the downlink reference signal, and the indication information is also used for indicating one or more subcarriers meeting the preset condition corresponding to each first sending port. Therefore, the terminal can know which sending port is the sending port of the subcarrier meeting the preset condition in the occupied subcarriers and which subcarrier in the subcarriers occupied by the sending port meets the preset condition, so that the terminal can perform targeted processing when channel information calculation is performed.

Description

Method and device for sending and receiving indication

Technical Field

The present application relates to the field of wireless communications, and more particularly, to methods and apparatus for transmitting and receiving indications.

Background

In a large-scale multiple-input multiple-output (Massive MIMO) technology, for example, a network device may reduce interference between multiple users and interference between multiple signal streams of the same user through a precoding technology, thereby improving signal quality, implementing space division multiplexing, and improving spectrum utilization. Therefore, it is important to obtain the accuracy of Channel State Information (CSI) such as a Precoding Matrix Indicator (PMI) and a Channel Quality Indicator (CQI).

At present, in a Frequency Division Duplex (FDD) system, because an uplink channel and a downlink channel have large frequency point intervals, the uplink channel and the downlink channel do not meet a direct reciprocity relationship, and accurate downlink precoding cannot be performed by using uplink channel information. However, in FDD systems, uplink and downlink channels have some reciprocity, including reciprocity of multipath angles and time delays. Therefore, partial prior information including the angle and the time delay information of the uplink channel can be obtained from the uplink channel, then the network device loads the obtained angle or time delay on the downlink reference signal, and notifies the terminal device to measure and feed back the supplementary information that the network device needs to obtain, and finally the network device reconstructs the downlink channel or pre-codes according to the information measured by the uplink reference signal and the supplementary information fed back by the terminal device.

In the prior art, when the network device loads an angle or a time delay to the downlink reference signal, there may be a problem that subcarriers of some transmission ports may affect the accuracy of the terminal device in performing CSI calculation, which may result in a low signal-to-noise ratio and affect the accuracy of CSI feedback information, and the terminal device cannot specifically consider the effects.

Disclosure of Invention

The application provides a method and a device for sending and receiving indication, so that a terminal can be more targeted in CSI calculation.

In a first aspect, a method of receiving an indication is provided. The method may be performed by a terminal, or may also be performed by a chip configured in the terminal, which is not limited in this application.

Specifically, the method comprises the following steps: a terminal receives indication information from network equipment, wherein the indication information is used for indicating one or more first sending ports of a downlink reference signal, the first sending ports are sending ports of subcarriers meeting a preset condition in subcarriers occupied by the downlink reference signal sending ports, and the indication information is also used for indicating one or more subcarriers meeting the preset condition corresponding to each first sending port; and the terminal determines the one or more first sending ports and one or more subcarriers meeting the preset conditions corresponding to each first sending port according to the indication information. It can be understood that, in the method, through an indication of the network device, the terminal may know which transmission port is a transmission port of a subcarrier that satisfies a predetermined condition among occupied subcarriers, and which subcarrier among subcarriers occupied by the transmission port satisfies the predetermined condition.

Therefore, the terminal can determine the one or more first sending ports and one or more subcarriers meeting the predetermined condition corresponding to each first sending port according to the indication information, so that the terminal can take the relevant consideration and process during the CSI calculation, and the accuracy of the CSI feedback information can be further improved.

In a second aspect, a method of transmitting an indication is provided. The method may be performed by a network device, or may be performed by a chip configured in the network device, which is not limited in this application.

Specifically, the method comprises the following steps: generating indication information, where the indication information is used to indicate one or more first sending ports of a downlink reference signal, where the first sending ports are sending ports where subcarriers meeting a predetermined condition exist in subcarriers occupied by the downlink reference signal sending ports, and the indication information is also used to indicate one or more subcarriers meeting the predetermined condition corresponding to each first sending port; and sending the indication information to the terminal. It can be understood that, in the method, it may be indicated which transmission port of the terminal is a transmission port of a subcarrier satisfying a predetermined condition among occupied subcarriers, and which subcarrier among the subcarriers occupied by the transmission port satisfies the predetermined condition.

Therefore, by indicating the one or more first transmitting ports of the terminal and the one or more subcarriers satisfying the predetermined condition corresponding to each first transmitting port, the terminal can consider the ports and the corresponding subcarriers satisfying the predetermined condition in the CSI calculation, so that the accuracy of the CSI feedback information can be improved.

With reference to the first aspect, in some possible implementations, the method further includes: and the terminal carries out subcarrier accumulation on each first sending port according to the indication information and a preset rule.

And when the terminal performs CSI calculation to accumulate the sub-carriers of each sending port, the terminal can perform targeted processing according to the indication information according to a preset rule.

With reference to the first aspect, in some possible implementations, the preset rule includes: and when the subcarriers of each first sending port are accumulated, ignoring the subcarriers which meet the preset conditions and correspond to each first sending port.

The signal-to-noise ratio is improved by considering that one or more subcarriers meeting the predetermined condition corresponding to each of the one or more first transmission ports may bring noise, and subcarriers meeting the predetermined condition are not considered when the subcarriers are accumulated for the ports.

With reference to the first aspect or the second aspect, in some possible implementations, the predetermined condition includes:

the transmitting power of the subcarrier is lower than a preset threshold value; or

The transmit power of the subcarriers is zero.

With reference to the first aspect or the second aspect, in some possible implementation manners, the indication information includes first indication information and second indication information, where the first indication information is used to indicate the one or more first sending ports, and the second indication information is used to indicate one or more subcarriers that satisfy a predetermined condition and correspond to each of the first sending ports.

With reference to the first aspect or the second aspect, in some possible implementation manners, the first indication information is carried in a bitmap; the second indication information is carried in L bitmaps, and L is equal to the number of the first sending ports indicated by the first indication information.

With reference to the first aspect or the second aspect, in some possible implementation manners, the first indication information is carried in a bitmap; the second indication information is one or more indication values; or, the first indication information is an indication value, and the second indication information is carried in one or more bitmap.

With reference to the first aspect or the second aspect, in some possible implementation manners, when the first indication information is carried in a bitmap, and the second indication information is one or more indication values, the indication value corresponds to a value associated with each first sending port

The number of one of the cases; n is a positive integer greater than or equal to 1, and is the total number of subcarriers occupied by each first sending port, N₂Less than or equal to N, and the number of the subcarriers which can be indicated by each first sending port at most and meet the preset condition is the number of the subcarriers which can be indicated by each first sending port at most; when the first indication information is an indication value and the second indication information is carried in one or more bitmap, the indication value corresponds to M sending ports

The number of one of the cases; m is a positive integer greater than or equal to 1, and is the number of downlink reference signal transmitting ports scheduled for the terminal by the network equipment; n is a radical of₁And M is less than or equal to the maximum number of the first sending ports capable of being indicated.

With reference to the first aspect or the second aspect, in some possible implementations, the indication information is an indication value.

With reference to the first aspect or the second aspect, in some possible implementations, the indication value corresponds to

The number of one of the cases; n is a positive integer greater than or equal to 1, and is the total number of downlink reference signal transmission ports scheduled for the terminal by the network device, and N is less than or equal to N, and is the number of the first transmission ports which can be indicated at most; k is a positive integer larger than or equal to 1 and is the total number of subcarriers occupied by each first sending port, and K is smaller than or equal to K and is the number of subcarriers which can be indicated by each first sending port at most and meet the preset condition.

In a third aspect, a method of receiving an indication is provided. The method may be performed by a terminal, or may also be performed by a chip configured in the terminal, which is not limited in this application.

Specifically, the method comprises the following steps: a terminal receives indication information from network equipment, wherein the indication information is used for indicating whether one or more first sending ports of a downlink reference signal exist or not, and the first sending ports are sending ports of subcarriers which meet a preset condition in subcarriers occupied by the downlink reference signal sending ports; and the terminal determines whether the one or more first sending ports exist according to the indication information. It can be understood that, in the method, it may be indicated which transmission port is a transmission port of a subcarrier satisfying a predetermined condition among occupied subcarriers and which transmission port is not a transmission port of a subcarrier satisfying a predetermined condition among occupied subcarriers.

Therefore, the terminal can determine whether the one or more first sending ports exist or not according to the indication information, so that the terminal can be considered and processed in a targeted manner during CSI calculation, and the accuracy of CSI feedback information can be further improved.

In a fourth aspect, a method of transmitting an indication is provided. The method may be performed by a network device, or may be performed by a chip configured in the network device, which is not limited in this application.

Specifically, the method comprises the following steps: generating indication information, wherein the indication information is used for indicating whether one or more first sending ports of a downlink reference signal exist, and the first sending ports are sending ports of subcarriers which meet a preset condition in subcarriers occupied by the downlink reference signal sending ports; and sending the indication information to the terminal. It can be understood that, in the method, it may be indicated which transmission port is a transmission port of a subcarrier satisfying a predetermined condition among occupied subcarriers and which transmission port is not a transmission port of a subcarrier satisfying a predetermined condition among occupied subcarriers.

Therefore, whether the terminal has the one or more first transmission ports or not is indicated, so that the terminal can be considered and processed in a targeted mode when the CSI is calculated, and the accuracy of CSI feedback information can be improved.

With reference to the third aspect, in some possible implementations, the method further includes: and if the first sending port exists, the terminal carries out subcarrier accumulation on each first sending port according to the indication information and a preset rule.

With reference to the third aspect, in some possible implementations, the preset rule includes: and when the subcarriers of each first sending port are accumulated, ignoring the subcarriers which meet the preset conditions and correspond to each first sending port.

With reference to the third aspect or the fourth aspect, in some possible implementations, the predetermined condition includes:

The transmit power of the subcarriers is zero.

With reference to the third aspect or the fourth aspect, in some possible implementation manners, the indication information is carried in a bitmap.

With reference to the third aspect or the fourth aspect, in some possible implementations, the first indication information is an indication value; the indication value is associated with M transmitting ports

The number of one of the cases; m is a positive integer greater than or equal to 1 and is the number of all sending ports scheduled for the terminal by the network equipment; n is a radical of₁And M is less than or equal to the maximum number of the first sending ports capable of being indicated.

With reference to the third aspect or the fourth aspect, in some possible implementations, the indication information is further used to indicate whether there are subcarriers that satisfy a predetermined condition.

With reference to the third aspect or the fourth aspect, in some possible implementations, the indication information is further used to indicate whether each of the first sending ports has one or more corresponding subcarriers that satisfy a predetermined condition.

With reference to the third aspect or the fourth aspect, in some possible implementations, if the indication information is further used to indicate whether there is a subcarrier meeting a predetermined condition, the indication information is an indication value, and the indication value corresponds to the subcarrier

With reference to the third aspect or the fourth aspect, in some possible implementations, if there is the first sending port, the indication information is further used to indicate whether there is one or more corresponding subcarriers that satisfy a predetermined condition in each of the first sending ports; or the indication information is further used for indicating one or more subcarriers meeting the predetermined condition corresponding to each first sending port.

With reference to the third aspect or the fourth aspect, in some possible implementation manners, the indication information includes first indication information and second indication information, where the first indication information is used to indicate whether the one or more first sending ports exist, and the second indication information is used to indicate whether each first sending port exists in corresponding one or more subcarriers that satisfy a predetermined condition.

With reference to the third aspect or the fourth aspect, in some possible implementation manners, the first indication information is carried in a bitmap; the second indication information is carried in M bitmaps, and M is equal to the bit number in the bitmaps carrying the first indication information.

With reference to the third aspect or the fourth aspect, in some possible implementation manners, the first indication information is carried in a bitmap; the second indication information is one or more indication values; or, the first indication information is an indication value, and the second indication information is carried in one or more bitmap. It can be understood that, when the second indication information is one or more indication values, the number of the indication values is equal to the number of bits in the bitmap carrying the first indication information; when the second indication information is carried in one or more bitmap, the number of the bitmap is equal to the total number of the downlink reference signal sending ports;

with reference to the third aspect or the fourth aspect, in some possible implementation manners, when the first indication information is carried in a bitmap, and the second indication information is one or more indication values, the indication value corresponds to a value associated with each first sending port

The number of one of the cases; n is a positive integer greater than or equal to 1, and is the total number of subcarriers occupied by each first sending port, N₂Less than or equal to N, to be able to refer to at most for each first transmitting portThe number of subcarriers satisfying a predetermined condition is shown.

With reference to the third aspect or the fourth aspect, in some possible implementation manners, the indication information includes first indication information and second indication information, where the first indication information is used to indicate whether the one or more first sending ports exist, and the second indication information is used to indicate one or more subcarriers, which meet a predetermined condition, corresponding to each first sending port.

With reference to the third aspect or the fourth aspect, in some possible implementation manners, the first indication information is carried in a bitmap; the second indication information is carried in L bitmaps, and L is equal to the number of the first sending ports indicated by the first indication information.

With reference to the third aspect or the fourth aspect, in some possible implementation manners, the first indication information is carried in a bitmap; the second indication information is one or more indication values; or, the first indication information is an indication value, and the second indication information is carried in one or more bitmap. It can be understood that, when the second indication information is one or more indication values, the number of the indication values is equal to the total number of the first transmission ports; when the second indication information is carried in one or more bitmap, the number of the bitmap is equal to the total number of the first sending ports; with reference to the third aspect or the fourth aspect, in some possible implementation manners, when the first indication information is carried in a bitmap, and the second indication information is one or more indication values, the indication value corresponds to a value associated with each first sending port

The number of one of the cases; n is a positive integer greater than or equal to 1, and is the total number of subcarriers occupied by each first sending port, N₂Less than or equal to N, and the number of the subcarriers which can be indicated by each first sending port at most and meet the preset condition is the number of the subcarriers which can be indicated by each first sending port at most; when the first indication information is an indication value, the second indication information is carried in one or more bit maps biWhen in tmap, said indication value is associated with M transmission ports

The number of one of the cases; m is a positive integer greater than or equal to 1 and is the total number of downlink reference signal transmitting ports scheduled for the terminal by the network equipment; n is a radical of₁And M is less than or equal to the maximum number of the first sending ports capable of being indicated.

In a fifth aspect, a communication device is provided, which comprises various modules or units, such as a processing unit and/or a communication unit, for performing the method in any one of the possible implementations of the first aspect or the third aspect. Corresponding to the first aspect, the communication unit is configured to receive indication information from a network device, where the indication information is used to indicate one or more first sending ports of a downlink reference signal, where the first sending port is a sending port where subcarriers meeting a predetermined condition exist among subcarriers occupied by the sending ports of the downlink reference signal, and the indication information is further used to indicate one or more subcarriers meeting the predetermined condition corresponding to each of the first sending ports; the processing unit is configured to determine, according to the indication information, the one or more first sending ports and one or more subcarriers that satisfy a predetermined condition and correspond to each of the first sending ports. Corresponding to the third aspect, the communication unit is configured to receive indication information from a network device, where the indication information is used to indicate whether there are one or more first transmission ports of a downlink reference signal, where the first transmission port is a transmission port where subcarriers meeting a predetermined condition exist in subcarriers occupied by the downlink reference signal transmission port; the processing unit is configured to determine whether the one or more first sending ports exist according to the indication information.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication unit may be a transceiver, or an input/output interface; the processing unit may be a processor.

In another implementation, the communication device is a chip or a system of chips configured in the terminal equipment. When the communication device is a chip or a chip system configured in a terminal device, the communication unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit, etc. on the chip or the chip system; the processing unit may be a processor, a processing circuit, a logic circuit, or the like.

Alternatively, the transceiver may be a transmit-receive circuit. Alternatively, the input/output interface may be an input/output circuit.

In a sixth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute instructions in the memory to implement the method of any of the possible implementations of the first aspect or the third aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip or a system of chips configured in the terminal equipment. When the communication device is a chip or a chip system configured in a terminal device, the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

In a seventh aspect, a communication device is provided, which includes various modules or units, such as a processing unit and/or a communication unit, for executing the method in any one of the possible implementations of the second aspect or the fourth aspect. Corresponding to the second aspect, the processing unit is configured to generate indication information, where the indication information is used to indicate one or more first sending ports of a downlink reference signal, where the first sending port is a sending port where subcarriers meeting a predetermined condition exist among subcarriers occupied by the sending ports of the downlink reference signal, and the indication information is further used to indicate one or more subcarriers meeting the predetermined condition corresponding to each first sending port; and the communication unit is used for sending the indication information to the terminal. Corresponding to the fourth aspect, the processing unit is configured to generate indication information, where the indication information is used to indicate one or more first sending ports of a downlink reference signal, and the first sending port is a sending port where subcarriers meeting a predetermined condition exist in subcarriers occupied by a downlink reference signal sending port; and the communication unit is used for sending the indication information to the terminal.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication unit may be a transceiver, or an input/output interface; the processing unit may be a processor.

In another implementation, the communication device is a chip or a system of chips configured in the network device. When the communication device is a chip or a chip system configured in a network device, the communication unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system; the processing unit may be a processor, a processing circuit, a logic circuit, or the like.

In an eighth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of any of the possible implementations of the second aspect or the fourth aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip or a system of chips configured in the network device. When the communication device is a chip or a system of chips configured in a network device, the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the system of chips. The processor may also be embodied as a processing circuit or a logic circuit.

In a ninth aspect, there is provided a processing apparatus comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processing apparatus performs the method of the first, second, third, or fourth aspect and any possible implementation manner of the first, second, third, or fourth aspect.

In a specific implementation process, the processing device may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the signal output by the output circuit may be output to and transmitted by a transmitter, for example and without limitation, and the input circuit and the output circuit may be the same circuit that functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processing device and various circuits.

In a tenth aspect, a processing apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and may receive a signal via the receiver and transmit a signal via the transmitter to perform the method of the first, second, third, or fourth aspect and any possible implementation of the first, second, third, or fourth aspect.

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integral to the processor or provided separately from the processor.

In a specific implementation process, the memory may be a non-transient memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It will be appreciated that the associated data interaction process, for example, sending the indication information, may be a process of outputting the indication information from the processor, and receiving the indication information may be a process of receiving the input indication information from the processor. In particular, data output by the processor may be output to a transmitter and input data received by the processor may be from a receiver. The transmitter and receiver may be collectively referred to as a transceiver, among others.

The processing device in the tenth aspect may be a chip, the processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated with the processor, located external to the processor, or stand-alone.

In an eleventh aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of any one of the possible implementations of the first or second aspect, and described above.

In a twelfth aspect, a computer-readable medium is provided, which stores a computer program (which may also be referred to as code, or instructions) that, when executed on a computer, causes the computer to perform the method of the first or second aspect described above, and any possible implementation of the first or second aspect.

In a thirteenth aspect, a communication system is provided, which includes the aforementioned network device and terminal device.

Drawings

FIG. 1 is a schematic diagram of a communication system suitable for use with an apparatus for sending and receiving indications in an embodiment of the present application;

FIG. 2 is a schematic flow chart of an apparatus for sending and receiving indications provided by an embodiment of the present application;

fig. 3 is an explanatory diagram of first indication information and second indication information provided by an embodiment of the present application;

fig. 4 is a schematic illustration of a further first indication information and a second indication information provided in an embodiment of the present application;

FIG. 5 is a schematic flow chart diagram of another apparatus for sending and receiving indications provided by an embodiment of the present application;

fig. 6 is a schematic block diagram of a communication device provided by an embodiment of the present application;

fig. 7 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: LTE Time Division Duplex (TDD), Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, fifth generation (5th generation, 5G) system, New Radio (NR), and the like. The 5G mobile communication system described in the present application includes a non-standalone (NSA) 5G mobile communication system or a Standalone (SA) 5G mobile communication system. The technical scheme provided by the application can also be applied to future communication systems, such as a sixth generation mobile communication system. The communication system may also be a Public Land Mobile Network (PLMN) Network, a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT) communication system, or other communication systems.

It should be understood that the network device in the communication system may be any device with wireless transceiving function or a chip disposed on the device, and the device includes but is not limited to: evolved Node B (eNB), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved Node B, or Home Node B, HNB), BaseBand Unit (BBU), Access Point (AP) in Wireless Fidelity (WIFI) system, Wireless relay Node, Wireless backhaul Node, Transmission Point (TP), or Transmission Reception Point (TRP), etc., and may also be 5G, such as NR, gNB in the system, or, a transmission point (TRP or TP), one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system, alternatively, it may also be a network node forming a gNB or a transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU).

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may also include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU implements Radio Link Control (RLC), Medium Access Control (MAC) and Physical (PHY) layers. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as RRC layer signaling or PHCP layer signaling, may also be considered to be transmitted by the DU or by the DU + RU under this architecture. It is to be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into network devices in the access network RAN, or may be divided into network devices in the core network CN, which is not limited herein.

It should also be understood that terminal equipment in the communication system may also be referred to as User Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user device. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical treatment (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios.

To facilitate understanding of the embodiments of the present application, a brief description of several terms referred to in the present application will be given first.

1. Channel reciprocity: in a Time Division Duplex (TDD) mode, uplink and downlink channels transmit signals on the same frequency domain resource and different time domain resources. The channel fading experienced by the signals on the uplink and downlink channels can be considered to be the same over a relatively short time (e.g., the coherence time of the channel propagation). This is the reciprocity of the uplink and downlink channels. Based on reciprocity of the uplink and downlink channels, the network device may measure the uplink channel according to an uplink reference signal, such as a Sounding Reference Signal (SRS). And the downlink channel can be estimated according to the uplink channel, so that a precoding matrix and the like for downlink transmission can be determined.

However, in a Frequency Division Duplex (FDD) mode, since the frequency band interval of the uplink and downlink channels is much larger than the coherence bandwidth, the uplink and downlink channels do not have complete reciprocity, and the determination of the precoding matrix for downlink transmission by using the uplink channel may not be able to adapt to the downlink channel. However, the uplink and downlink channels in FDD mode still have some reciprocity, such as angular reciprocity and time delay reciprocity. Thus, the angle and the time delay may also be referred to as reciprocity parameters.

Since the signal may travel multiple paths from the transmit antenna to the receive antenna as it travels through the wireless channel. Multipath delay spread results in frequency selective fading, which is a change in the frequency domain channel. The delay is the transmission time of the radio signal on different transmission paths, is determined by the distance and the speed, and has no relation with the frequency domain of the radio signal. Therefore, the uplink and downlink channels with the same delay in FDD mode can be considered to be identical or reciprocal.

In addition, the angle may refer to an angle of arrival (AOA) at which a signal arrives at a receiving antenna via a wireless channel, and may also refer to an angle of departure (AOD) at which a signal is transmitted through a transmitting antenna. In this embodiment, the angle may refer to an arrival angle at which the uplink signal reaches the network device, or may refer to a departure angle at which the network device transmits the downlink signal. Due to reciprocity of transmission paths of uplink and downlink channels on different frequencies, the arrival angle of the uplink reference signal and the departure angle of the downlink reference signal can be considered as reciprocity.

Therefore, it can be considered that the uplink and downlink channels in the FDD mode have reciprocity in time delay and angle. In the present embodiment, each angle may be characterized by an angle vector. Each delay can be characterized by a delay vector. Therefore, in the embodiment of the present application, one angle vector may represent one angle, and one delay vector may represent one delay.

2. Reference Signal (RS): the reference signal may also be referred to as a pilot (pilot), reference sequence, or the like. In the embodiment of the present application, the reference signal may be a reference signal for channel measurement. For example, the reference signal may be a channel state information reference signal (CSI-RS), a Sounding Reference Signal (SRS), or the like. It should be understood that the above-listed reference signals are only examples and should not constitute any limitation to the present application. This application does not exclude the possibility of defining other reference signals in future protocols to achieve the same or similar functions.

The reference signal in the embodiment of the present application, which may be referred to as a downlink reference signal, is obtained by precoding, by a network device, the reference signal based on a channel reciprocity parameter. The precoding may specifically comprise beamforming and/or phase rotation. Beamforming, for example, may be implemented by precoding a reference signal based on one or more angle vectors. The phase rotation may be achieved, for example, by precoding the reference signal with one or more delay vectors. Precoding the downlink reference signal based on the one or more angle vectors, which may also be referred to as loading the one or more angle vectors onto the downlink reference signal. Precoding the downlink reference signal based on one or more delay vectors, which may also be referred to as loading one or more delay vectors onto the downlink reference signal.

3. FDD downlink channel reconstruction (also referred to as CSI acquisition based on FDD partial reciprocity):

the method for reconstructing the downlink channel based on the CSI of the FDD system comprises the following steps:

the method comprises the following steps: the network equipment receives the SRS sent by the terminal equipment, and estimates information (such as a direction angle, time delay and the like) with reciprocity of an uplink and a downlink by utilizing the uplink SRS;

step two: the network equipment sends a downlink reference signal to the terminal equipment, specifically, the network equipment loads the obtained information with reciprocity of the uplink and the downlink to the downlink reference signal, and informs the terminal equipment to measure and feed back the supplementary information which needs to be obtained by the network equipment;

step three: the terminal device re-estimates and feeds back the supplementary information (for example, the full-band complex amplitude corresponding to each port) by using the downlink reference signal;

step four: and the network equipment reconstructs the downlink channel by using the information acquired in the first step and the third step.

4. Transmission port (transmission port): the reference signal transmission port may be referred to as an antenna port, a downlink reference signal transmission port, or a reference signal transmission port, or may be referred to as a port or a Tx port for short. For transmission of signals or data, a transmitting antenna recognized by a receiving end device, or a transmitting antenna that is spatially distinguishable. A port is a logical meaning, one antenna port may be configured for each virtual antenna, each virtual antenna may be a weighted combination of multiple physical antennas, and each antenna port may correspond to one reference signal port. The antenna port is used for carrying at least one of a specific physical channel and a physical signal. Signals transmitted through the same antenna port, whether transmitted through the same or different physical antennas, may be considered the same or correlated (e.g., large-scale channel characteristics, such as channel matrix H, are the same) for the channels corresponding to the paths they travel through in space. That is, the receiving end may consider the same or correlated channels of the signals transmitted through the same antenna port when demodulating the signals. That is, the antenna ports define a channel on a certain symbol, and the antenna ports of two symbols are the same, that is, a channel on one symbol can be inferred by a channel on the other symbol.

In the present example, a "special transmission port" (which may also be referred to as a first transmission port) is used to indicate a transmission port in which subcarriers satisfying a predetermined condition exist among subcarriers occupied by the transmission port.

5. Channel State Information (CSI): may include at least one of the following information: channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS resource indicator (CSI-RS resource indicator), Synchronization Signal Block (SSB) resource indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), Reference Signal Received Power (RSRP). The RSRP may be the RSRP of layer 1 (L1-RSRP). In this application, the channel state information may further include a synchronization measurement result or indication information of the synchronization measurement result.

6. Subcarrier: the ue is configured to carry signals, occupies a bandwidth in a frequency domain, and may be embodied as Resource Elements (REs). In the present example, "special subcarriers" are used to indicate subcarriers that satisfy a predetermined condition.

In addition, in order to facilitate understanding of the embodiments of the present application, the following description is made.

First, in the present application, "for indicating" may include for direct indication and for indirect indication. When a certain indication information is described for indicating a, the indication information may be included to directly indicate a or indirectly indicate a, and does not mean that a is necessarily carried in the indication information.

If the information indicated by the indication information is referred to as information to be indicated, in a specific implementation process, there are many ways of indicating the information to be indicated, for example, but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or an index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein an association relationship exists between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other part of the information to be indicated is known or predetermined. For example, the indication of the specific information may be implemented by means of a predetermined arrangement order of the respective information (e.g., protocol specification), thereby reducing the indication overhead to some extent.

The information to be indicated may be sent together as a whole, or may be sent separately by dividing into a plurality of pieces of sub information, and the sending periods and/or sending timings of these pieces of sub information may be the same or different. Specific transmission method this application is not limited. The sending period and/or sending timing of the sub information may be predefined, for example, predefined according to a protocol, or may be configured by the transmitting end device by sending configuration information to the receiving end device. The configuration information may include, for example and without limitation, one or a combination of at least two of radio resource control (rrc) signaling, Medium Access Control (MAC) layer signaling, and physical layer signaling. Among them, radio resource control signaling such as packet Radio Resource Control (RRC) signaling; the MAC layer signaling includes, for example, a MAC Control Element (CE); the physical layer signaling includes, for example, Downlink Control Information (DCI).

Second, the first, second and various numerical numbers in the embodiments shown below are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, the first and second may be distinguished as types in the embodiment of the present application, and not as object contents.

Third, the term "store" referred to in the embodiments of the present application may refer to storing in one or more memories. The one or more memories may be provided separately or integrated in the encoder or decoder, the processor, or the communication device. The one or more memories may also be provided separately, with a portion of the one or more memories being integrated into the decoder, the processor, or the communication device. The type of memory may be any form of storage medium and is not intended to be limiting of the present application.

Fourth, the "protocol" referred to in this embodiment of the present application may refer to a standard protocol in the communication field, and may include, for example, an LTE protocol, an NR protocol, a WLAN protocol, and other related protocols in the communication system, which is not limited in this application.

Fifth, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, and c, may represent: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a, b and c. Wherein a, b and c may be single or plural respectively.

The foregoing briefly describes a scenario in which the embodiment of the present application can be applied, and introduces a basic concept that may be involved in the embodiment of the present application, and the following describes in detail a method for channel measurement provided by the embodiment of the present application with reference to the accompanying drawings.

It should be understood that the methods provided by the embodiments of the present application may be applied to systems that communicate via multiple antenna techniques, such as the communication system 100 shown in fig. 1. The communication system may include at least one network device 110 and at least one terminal 120. The network device 110 and the terminal 120 may communicate via multiple antenna techniques. In order to perform FDD downlink channel reconstruction, the network device needs to estimate information (e.g., a direction angle, a time delay, etc.) with reciprocity of uplink and downlink based on an SRS transmitted by a terminal; loading the obtained information with reciprocity between the uplink and the downlink to a downlink reference signal, sending the reference signal to a terminal for measurement and feeding back the supplementary information which needs to be obtained by the network equipment;

without loss of generality, assuming that a terminal has 1 antenna, a network device has M antennas to form a Uniform Linear Array (ULA) array, taking a frequency domain channel corresponding to a transmission port of 1 network device (i.e. estimating 1 path complex coefficient) as an example, a weighted downlink reference signal occupies N subcarriers, and the weighted downlink channel may be represented as follows for different Resource Elements (REs):

h₁w₁+n₁(for RE)₁)；

h₂w₂+n₂(for RE)₂)；

……

h_N-1w_N-1+n_N-1(for RE)_N-1)；

h_Nw_N+n_N(for RE)_N)；

Wherein h is_iFor the channel on the ith subcarrier, w_iIs the weight on the corresponding subcarrier, n_iIs the noise on the corresponding subcarrier.

And the terminal linearly superposes the estimation results of the frequency domain channel corresponding to the sending port to obtain the full-band complex amplitude c on the sending port:

and the terminal feeds back the full-band complex amplitude corresponding to each transmitting port to the network equipment. And the network equipment reconstructs a downlink channel by using the direction angle and the time delay of each propagation path estimated by the uplink and the full-band complex amplitude of each transmitting port reestimated and fed back by the terminal.

In the embodiment of the application, it is considered that subcarriers of some sending ports may affect the accuracy of the CSI calculation performed by the terminal, which may result in a low signal-to-noise ratio and affect the accuracy of CSI feedback information. Therefore, the network device may instruct the terminals that need to consider the transmission ports and the subcarriers that may affect the CSI information, so that the terminals may consider in a targeted manner when performing full-band complex amplitude calculation of each transmission port, for example, ignoring subcarriers that may affect the full-band complex amplitude calculation of the transmission port, and when linearly superimposing the subcarriers, not superimposing estimation results of the frequency domain channel corresponding to the subcarriers; optionally, the estimation results of the frequency domain channel corresponding to the subcarrier may be subjected to special processing and then superimposed; the above is merely an example, and the present application does not limit how to specifically process the estimation result of the frequency domain channel corresponding to the affected subcarrier.

It should also be understood that the embodiments shown below do not particularly limit the specific structure of the execution subject of the method provided by the embodiments of the present application, as long as the execution subject can communicate with the method provided by the embodiments of the present application by running the program recorded with the code of the method provided by the embodiments of the present application, for example, the execution subject of the method provided by the embodiments of the present application may be a terminal or a network device, or a functional module capable of calling the program and executing the program in the terminal or the network device.

Hereinafter, the method for sending and receiving indication provided by the embodiment of the present application is described in detail by taking interaction between a network device and a terminal as an example without loss of generality. It should be noted that, for convenience of solution understanding, in the description, the embodiments of the present application are all developed in terms of behaviors of multiple sides of a terminal and a network device, and are described in an overall view from the perspective of multiple interaction parties, but in no way limits that in a system, the steps on the sides of interaction must be performed together.

Fig. 2 is a schematic flow chart diagram of a method 200 of sending and receiving indications provided by an embodiment of the application, shown from the perspective of device interaction.

As shown in fig. 2, the method 200 of the embodiment of the present application may include steps 210 to 240. The following describes in detail the various steps in the apparatus 200:

in step 210, the network device generates indication information, where the indication information is used to indicate one or more special transmission ports of the downlink reference signal and to indicate one or more special subcarriers corresponding to each special transmission port; the special sending port is a sending port of the special subcarrier existing in the subcarriers occupied in the sending port, and the special subcarrier is a subcarrier meeting a preset condition.

Optionally, the subcarriers meeting the predetermined condition are subcarriers indicated to the terminal by the network device, for example, subcarriers with transmission power lower than a first preset threshold, subcarriers with transmission power being zero, subcarriers with transmission power higher than a second preset threshold, and so on. The terminal can then take these contributions into account when performing calculations for the transmit port.

The network device indicates to the terminal which one or more transmitting ports (hereinafter collectively expressed as "special transmitting ports") of the sub-carriers satisfying the predetermined condition exist in the occupied sub-carriers, and also indicates one or more sub-carriers (hereinafter collectively expressed as "special sub-carriers") satisfying the predetermined condition corresponding to each special transmitting port. It should be noted that the network device may indicate all special transmitting ports in all transmitting ports for the terminal, or may indicate part of the special transmitting ports; for each of the special transmit ports, the network device may indicate all of its corresponding special subcarriers, or may indicate some of its corresponding special subcarriers. The part of special transmitting ports or the part of special subcarriers can be selected according to a preset rule or protocol specification, for example, according to the number of occupied special subcarriers, the special transmitting ports with the first N bits in all special transmitting ports are used as the part of special transmitting ports to be indicated to the terminal; similarly, in the special subcarriers occupied by each special sending port, part of subcarriers can be selected according to a certain rule to indicate to the terminal; the indication may also be differentiated for different special transmitting ports (e.g. special transmitting port 1, special transmitting port 2, special transmitting port 3) according to rules or conditions, for example, all the special subcarriers occupied by the special transmitting port 1 may be indicated, all the special subcarriers occupied by the special transmitting port 2 may not be indicated, and then the special subcarriers of the occupied part of the special transmitting port 2 are indicated, and the same as the special transmitting port 2 is indicated for the special transmitting port 3.

It should be noted that the number of subcarriers occupied by different transmission ports and the occupied subcarriers may be different. The following description describes subcarrier 1 and subcarrier 2 … …, which are different subcarriers corresponding to each originating port, but do not necessarily mean that the subcarriers 1 corresponding to different transmitting ports are the same subcarrier.

In step 220, the network device sends the indication information, and the terminal receives the indication information.

In the embodiment of the application, the form of the indication information is not limited, and the indication information may be directly indicated or indirectly indicated, and the indication may be realized in different indication modes.

Optionally, the indication information includes first indication information and second indication information, where the first indication information is used to indicate the one or more special sending ports, and the second indication information is used to indicate one or more special subcarriers corresponding to each special sending port. Alternatively, the first indication information and the second indication information may be transmitted together or separately. The second indication information includes one or more sub-indication information, the sub-indication information may be sent together or sent separately, and the sub-indication information is used to indicate the special sub-carriers occupied by different special sending ports separately.

Several exemplary indications are given below:

the first method is as follows:

the first indication information and the second indication information may be in the form of bitmaps (bitmaps), the first indication information is carried in one bitmap, the second indication information is carried in L bitmaps, L is equal to the number of the special sending ports indicated by the first indication information, and assuming that there are M sending ports for the terminal in total, 1+ M bitmaps are required at most (if all sending ports are special sending ports). As shown in fig. 3, a bitmap with a number of 0 (taking 0 as an example only) is used to indicate the special sending port, and optionally, the indication of the special sending port may be indicated by its port identifier. Wherein, the sending port corresponding to the bit with the value of 1 is the special sending port, and as can be seen from the figure, at least sending port 2 and sending port 5 are special sending ports in total 6 sending ports for the terminal; then L takes the value of 2, the bitmap with the number of 1 is used to indicate the special subcarrier of the transmission port 2, the bitmap with the number of 2 is used to indicate the special subcarrier of the transmission port 5, and optionally, the indication of the subcarrier can be indicated by its position identifier. As can be seen from the figure, for the transmitting port 2, at least the subcarriers at position 1 and position 3 are special subcarriers; for the sending port 5, at least the sub-carriers at the position 1, the position 2 and the position 4 in the occupied sub-carriers are special sub-carriers; fig. 3 is only an example, and the indication rule may not be limited thereto, and for example, a bit value of 0 may also indicate a special transmission port or a special subcarrier.

Optionally, in the bitmap for indicating the special sending port, the values of the bits may all be 0, that is, there is no special sending port. Optionally, no matter whether a special sending port exists or not, a value of L may be fixed to M, so for a non-special sending port (the occupied sub-carrier does not exist in the special sub-carrier), a bitmap indicated by a corresponding sub-carrier may also be sent, only bit values in the bitmap are all 0, and when the terminal reads the bitmap, the bitmap corresponding to the non-special sending port and used for sub-carrier indication is not read.

Optionally, if there is no special subcarrier in all the transmitting ports for the terminal, only one bitmap is transmitted, where the values of the bits are all 0, so as to indicate that there is no special transmitting port.

The second method comprises the following steps:

the first indication information is carried in a bitmap, and the second indication information is one or more indication values. The first indication information is bitmap in a manner similar to the above-mentioned manner one, and is not described herein again. The indication value as the second indication information may have one or more, respectively associated with M sending ports

The number of one of the cases; m is a positive integer greater than or equal to 1 and is the number of all sending ports scheduled for the terminal by the network equipment; n is a positive integer greater than or equal to 1, and is the total number of subcarriers occupied by each transmission port, N₂Less than or equal to N, which is the maximum number of special subcarriers that can be indicated for each transmit port. Optionally, if it is further required to indicate that no special sending port exists and no special subcarrier exists, values of bits in the bitmap for indicating the special sending port may all be 0, that is, it is indicated that no special sending port exists; the indication value may have one and take a specific value, or the indication information may have M's, M' is less than or equal to M, and each indication information may take a specific value.

Taking the case that no special sending port exists as an example, if M takes the value of 6, N takes the value of 4, and if N takes the value of 4₂2 can indicate a maximum of 2 special subcarriers per transmit port, thatThere are two possibilities, one may indicate 1 special subcarrier and the other may indicate 2 special subcarriers, then:

for 4 subcarriers, if there are special subcarriers, indicating 1 special subcarrier, there are four cases:

in case one, the special subcarrier is subcarrier 1 with position identifier 1;

in case two, the special subcarrier is subcarrier 2 with position identifier 2;

in case three, the special subcarrier is subcarrier 3 with position identifier 3;

in case four, the special subcarrier is subcarrier 4 whose position is identified as 4.

Representing 4 sub-carriers, if there are special sub-carriers, indicating 2 special sub-carriers, then there are six cases:

in case five, the special subcarriers are subcarrier 1 and subcarrier 2 with position identifiers of 1 and 2;

in case six, the special subcarriers are subcarrier 1 and subcarrier 3 whose position identifiers are 1 and 3;

in case seven, the special subcarriers are subcarrier 1 and subcarrier 4 whose position identifiers are 1 and 4;

in case eight, the special subcarriers are subcarrier 2 and subcarrier 3 whose position identifiers are 2 and 3;

in case nine, the special subcarriers are subcarrier 2 and subcarrier 4 whose position identifiers are 2 and 4;

case ten, the special subcarriers are subcarrier 3 and subcarrier 4 whose location identifications are 3 and 4.

The association of the indicator values, the conditions and the indicated special sub-carriers is illustrated by table 1:

TABLE 1

Therefore, according to different indicated values indicated by the network device, the terminal can determine which subcarrier is a special subcarrier in subcarriers occupied by a certain transmission port.

The correspondence shown in table 1 is merely an example, and the correspondence may be set in advance or defined by a protocol, or the terminal and the network device may each maintain a correspondence table.

As shown in fig. 4, through the bitmap indication, the terminal knows that at least transmission port 2 and transmission port 5 are special transmission ports among the total 6 transmission ports for the terminal. Then, the second indication information associated with the sending port 2 is the indicated value 0010, and then the terminal can know that at least the subcarrier 3 in the subcarriers occupied by the sending port 2 is a special subcarrier; then the second indication information associated with the transmitting port 5 is the indication value 0111, and then the terminal can know that at least the subcarrier 2 and the subcarrier 3 in the subcarriers occupied by the transmitting port 5 are special subcarriers.

Optionally, in the bitmap for indicating the special sending port, the values of the bits may all be 0, that is, it indicates that there is no special sending port. Alternatively in this case, the second indication information may not be transmitted, or the second indication information may take a specific value as described above.

The third method comprises the following steps:

the indication information is an indication value, and the third mode is equivalent to performing joint indication on a special sending port and a special subcarrier. Said indication value corresponds to

One of the conditionsA number of instances; n is a positive integer greater than or equal to 1, and is the total number of downlink reference signal transmission ports scheduled for the terminal by the network device, and N is less than or equal to N, and is the number of the first transmission ports which can be indicated at most; k is a positive integer larger than or equal to 1 and is the total number of subcarriers occupied by each first sending port, and K is smaller than or equal to K and is the number of subcarriers which can be indicated by each first sending port at most and meet the preset condition. Optionally, if it is also required to indicate that there is no special subcarrier (corresponding to no special transmission port), the indication value corresponds to

Numbering of one of the cases, as compared to

The extra "+ 1" case corresponds to an indication value indicating that no special subcarrier exists.

Taking a case where it is not necessary to indicate that there is no special subcarrier (which is equivalent to no special transmission port), if N is 4, K is 3, and if N is 2, 2 or more special transmission ports can be indicated, there are two possibilities, one may be indicating 1 special transmission port, and the other may be indicating 2 special transmission ports; k-2 can indicate at most 2 special subcarriers per transmit port, then there are two possibilities, one may indicate 1 special subcarrier, the other may indicate 2 special subcarriers, then:

in 4 representative transmitting ports, if there are special transmitting ports, indicating 1 special transmitting port, there are four cases:

in case 1, the special transmission port is a transmission port 1 with a port identifier of 1;

case 2, the special sending port is a sending port 2 with a port identifier of 2;

case 3, the special sending port is the sending port 3 with port identification 3;

case 4, the special transmission port is transmission port 4 with port identification 4.

In 4 representative transmitting ports, if there are special transmitting ports indicating 2 transmitting ports, then there are six cases:

case 5, the special sending ports are sending port 1 and sending port 2 with port identifications 1 and 2;

case 6, the special transmit ports are transmit port 1 and transmit port 3 with port identifications 1 and 3;

case 7, the special transmit ports are transmit port 1 and transmit port 4 with port identifications 1 and 4;

case 8, the special transmit ports are transmit port 2 and transmit port 3 with port identifications 2 and 3;

case 9, the special transmit ports are transmit port 2 and transmit port 4 with port identifications 2 and 4;

case 10, the special transmit ports are transmit port 3 and transmit port 4 with port identifications 3 and 4.

Representing 3 sub-carriers, if there are special sub-carriers, indicating 1 special sub-carrier, then three cases are corresponded:

in case 1, the special subcarrier is subcarrier 1 with position identifier 1;

case 2, the special subcarrier is subcarrier 2 with position identification 2;

case 3, the special subcarrier is subcarrier 3 whose position is identified as 3.

Representing 3 sub-carriers, if there are special sub-carriers, indicating 2 special sub-carriers, then three cases are corresponded again:

case 4, the special subcarriers are subcarrier 1 and subcarrier 2 whose position identifiers are 1 and 2;

case 5, the special subcarriers are subcarrier 1 and subcarrier 3 whose position identifiers are 1 and 3;

case 6, the special subcarriers are subcarrier 2 and subcarrier 3 whose positions are identified as 2 and 3.

If there are special transmitting ports and special subcarriers, indicating 1 special transmitting port, corresponding to 24 cases:

in case 1, the special transmitting port is a transmitting port 1 with a port identifier of 1, and the special subcarrier is a subcarrier 1 with a position identifier of 1;

case 2, the special transmitting port is a transmitting port 1 with a port identifier of 1, and the special subcarrier is a subcarrier 2 with a position identifier of 2;

case 3, the special transmitting port is a transmitting port 1 with a port identifier of 1, and the special subcarrier is a subcarrier 3 with a position identifier of 3;

case 4, the special transmitting port is a transmitting port 1 with a port identifier of 1, and the special subcarriers are subcarriers 1 and 2 with position identifiers of 1 and 2;

case 5, the special transmitting port is a transmitting port 1 with a port identifier of 1, and the special subcarriers are subcarriers 1 and 3 with position identifiers of 1 and 3;

case 6, the special transmitting port is transmitting port 1 with port identification 1, and the special subcarriers are subcarriers 2 and 3 with position identifications 2 and 3;

case 7, the special transmitting port is a transmitting port 2 with a port identifier of 2, and the special subcarrier is a subcarrier 1 with a position identifier of 1;

in case 8, the special transmitting port is a transmitting port 2 with a port identifier of 2, and the special subcarrier is a subcarrier 2 with a position identifier of 2;

……

case 23, the special transmitting port is transmitting port 4 with port id 4, and the special subcarriers are subcarriers 1 and 3 with position ids 1 and 3;

case 24, the special transmission port is transmission port 4 with port identification 4, and the special subcarriers are subcarriers 2 and 3 with position identifications 2 and 3.

If there are special transmitting ports and special subcarriers, indicating 2 special transmitting ports, there are 216 cases:

in case 1, the special transmitting ports are a transmitting port 1 and a transmitting port 2 with port identifiers 1 and 2, the special subcarrier occupied by the transmitting port 1 is the subcarrier 1 with the position identifier 1, and the special subcarrier occupied by the transmitting port 2 is the subcarrier 1 with the position identifier 1;

case 2, the special transmitting ports are a transmitting port 1 and a transmitting port 2 with port identifiers 1 and 2, the special sub-carrier wave occupied by the transmitting port 1 is the sub-carrier wave 1 with the position identifier 1, and the special sub-carrier wave occupied by the transmitting port 2 is the sub-carrier wave 2 with the position identifier 2;

case 3, the special transmitting ports are a transmitting port 1 and a transmitting port 2 with port identifiers 1 and 2, the special subcarrier occupied by the transmitting port 1 is a subcarrier 1 with a position identifier 1, and the special subcarrier occupied by the transmitting port 2 is a subcarrier 3 with a position identifier 3;

case 4, the special transmitting ports are the transmitting port 1 and the transmitting port 2 with the port identifiers 1 and 2, the special subcarriers occupied by the transmitting port 1 are the subcarriers 1 with the position identifiers 1, and the special subcarriers occupied by the transmitting port 2 are the subcarriers 1 and the subcarriers 2 with the position identifiers 1 and 2;

case 5, the special transmitting ports are transmitting port 1 and transmitting port 2 with port identifiers 1 and 2, the special subcarriers occupied by transmitting port 1 are subcarriers 1 with position identifiers 1, and the special subcarriers occupied by transmitting port 2 are subcarriers 1 and 3 with position identifiers 1 and 3;

case 6, the special transmitting ports are transmitting port 1 and transmitting port 2 with port identifiers 1 and 2, the special subcarriers occupied by transmitting port 1 are subcarriers 1 with position identifiers 1, and the special subcarriers occupied by transmitting port 2 are subcarriers 2 and 3 with position identifiers 2 and 3;

case 7, the special transmitting ports are transmitting port 1 and transmitting port 2 with port identifiers 1 and 2, the special subcarrier occupied by transmitting port 1 is subcarrier 2 with position identifier 2, and the special subcarrier occupied by transmitting port 2 is subcarrier 1 with position identifier 1;

……

in case 19, the special transmitting ports are transmitting port 1 and transmitting port 2 with port identifiers 1 and 2, the special subcarriers occupied by transmitting port 1 are subcarriers 1 and 2 with position identifiers 1 and 2, and the special subcarriers occupied by transmitting port 2 are subcarriers 1 with position identifiers 1;

in case 20, the special transmitting ports are transmitting port 1 and transmitting port 2 with port identifiers 1 and 2, the special subcarriers occupied by transmitting port 1 are subcarriers 1 and subcarriers 2 with position identifiers 1 and 2, and the special subcarriers occupied by transmitting port 2 are subcarriers 2 with position identifiers 2;

……

in case 24, the special transmitting ports are transmitting port 1 and transmitting port 2 with port identifiers 1 and 2, the special subcarriers occupied by transmitting port 1 are subcarriers 1 and subcarriers 2 with position identifiers 1 and 2, and the special subcarriers occupied by transmitting port 2 are subcarriers 2 and subcarriers 3 with position identifiers 2 and 3;

……

36, the special transmitting ports are the transmitting port 1 and the transmitting port 2 with the port identifiers of 1 and 2, the special subcarriers occupied by the transmitting port 1 are the subcarriers 2 and the subcarriers 3 with the position identifiers of 2 and 3, and the special subcarriers occupied by the transmitting port 2 are the subcarriers 2 and the subcarriers 3 with the position identifiers of 2 and 3;

in case 37, the special transmitting ports are transmitting port 1 and transmitting port 3 with port identifiers 1 and 3, the special subcarrier occupied by transmitting port 1 is subcarrier 1 with position identifier 1, and the special subcarrier occupied by transmitting port 2 is subcarrier 1 with position identifier 1;

……

in case 216, the special transmitting ports are transmitting port 3 and transmitting port 4 with port identifiers 3 and 4, the special subcarriers occupied by transmitting port 3 are subcarriers 2 and 3 with position identifiers 2 and 3, and the special subcarriers occupied by transmitting port 4 are subcarriers 2 and 3 with position identifiers 2 and 3.

Thus, according to

Thus, a total of 240 cases are known, which are:

the first condition is as follows: the special transmitting port is a transmitting port 1 with a port identifier of 1, and the special subcarrier is a subcarrier 1 with a position identifier of 1;

in case two, the special transmitting port is a transmitting port 1 with a port identifier of 1, and the special subcarrier is a subcarrier 2 with a position identifier of 2;

in case three, the special transmitting port is a transmitting port 1 with a port identifier of 1, and the special subcarrier is a subcarrier 3 with a position identifier of 3;

in case four, the special transmitting port is a transmitting port 1 with a port identifier of 1, and the special subcarriers are subcarriers 1 and 2 with position identifiers of 1 and 2;

……

twenty-four cases, the special transmission port is transmission port 4 with port id 4, and the special subcarriers are subcarriers 2 and 3 with position ids 2 and 3.

Twenty five, the special sending ports are a sending port 1 and a sending port 2 with port identifications 1 and 2, the special subcarrier occupied by the sending port 1 is the subcarrier 1 with the position identification 1, and the special subcarrier occupied by the sending port 2 is the subcarrier 1 with the position identification 1;

twenty-six, the special sending ports are sending port 1 and sending port 2 with port identifiers 1 and 2, the special subcarrier occupied by the sending port 1 is subcarrier 1 with position identifier 1, and the special subcarrier occupied by the sending port 2 is subcarrier 2 with position identifier 2;

……

in case two hundred and forty, the special transmitting ports are the transmitting port 3 and the transmitting port 4 with the port identifiers of 3 and 4, the special subcarriers occupied by the transmitting port 3 are the subcarriers 2 and 3 with the position identifiers of 2 and 3, and the special subcarriers occupied by the transmitting port 4 are the subcarriers 2 and 3 with the position identifiers of 2 and 3.

The association of the indicated values, the conditions and the indicated special transmission ports and special subcarriers is illustrated by table 2:

TABLE 2

Therefore, according to different indicated values indicated by the network device, the terminal can determine which transmission port is the special transmission port, and which subcarrier is the special subcarrier in the subcarriers occupied by each special transmission port.

The correspondence shown in table 2 is merely an example, and the correspondence may be set in advance or defined by a protocol, or the terminal and the network device may each maintain a correspondence table.

Optionally, if there is no special subcarrier (which is equivalent to there being no special transmission port), a specific value may be sent to indicate that there is a value corresponding to a case where "+ 1" is added.

The method is as follows:

the first indication information is an indication value, the second indication information is carried in X bitmaps, and X is a positive integer and is determined according to the first indication information.

The indication value is associated with M transmitting ports

The number of one of the cases; m is a positive integer greater than or equal to 1 and is the number of all sending ports scheduled for the terminal by the network equipment; n is a radical of₁Less than or equal to M, and the number of the special sending ports which can be indicated at most. Optionally, if it is further required to indicate that no special sending port exists, the indication value corresponds to

Numbering of one of the cases, as compared to

The extra "+ 1" case corresponds to an indication value indicating that there is no special transmission port.

Taking the case that no special sending port exists as an example, if M takes the value of 6, if N takes the value of N₁If 2 can indicate at most 2 special transmit ports for a terminal, then there are two possibilities, one possibility is to indicate 1 special transmit port, and the other possibility is to indicate 2 special transmit ports, then:

in case one, the special sending port is a sending port 1 with a port identifier of 1;

in case two, the special sending port is a sending port 2 with a port identifier of 2;

in case three, the special sending port is the sending port 3 with the port identification of 3;

in case four, the special transmission port is the transmission port 4 with the port identification of 4.

If there are special transmitting ports in the 4 transmitting ports, indicating 2 special transmitting ports, then there are six cases:

in case five, the special sending ports are sending port 1 and sending port 2 with port identifications 1 and 2;

in case six, the special sending ports are sending port 1 and sending port 3 with port identifications 1 and 3;

in case seven, the special sending ports are sending port 1 and sending port 4 with port identifications 1 and 4;

in case eight, the special transmitting ports are the transmitting port 2 and the transmitting port 3 with the port identifications of 2 and 3;

in case nine, the special transmission ports are transmission port 2 and transmission port 4 with port identifiers of 2 and 4;

case ten, the special transmission ports are transmission port 3 and transmission port 4 of which port identifications are 3 and 4.

The association of the indication values, the conditions and the indicated special transmission ports is illustrated by table 3:

TABLE 3

Therefore, according to different indication values indicated by the network device, the terminal can determine which of the sending ports is the special sending port.

The correspondence shown in table 3 is merely an example, and the correspondence may be set in advance or defined by a protocol, or the terminal and the network device may each maintain a correspondence table.

The second indication information is carried in X bitmaps, and X is determined according to the first indication information. For example, according to the above example, if the first indication information is 0010, X is equal to 1, indicating one or more special subcarriers occupied by transmission port 3. If the first indication information is 1000, X is equal to 2, and 2 bitmaps respectively correspond to the transmitting port 2 and the transmitting port 4. Optionally, the smaller-numbered or front bitmap corresponds to the transmission port with the smaller transmission port identifier, or the larger-numbered or rear bitmap corresponds to the transmission port with the larger transmission port identifier, which is not limited in this embodiment.

Optionally, if there is no special sending port, the indicated value may take a specific value, that is, a value corresponding to a case where there is the above-mentioned "+ 1" extra. Optionally, the second indication information is not sent.

Therefore, the network device may send the indication information to the terminal in different indication manners.

In step 230, the terminal determines the one or more special transmission ports and one or more special subcarriers corresponding to each special transmission port according to the indication information.

The terminal can know which sending port is the special sending port and which subcarrier is the special subcarrier in the subcarriers corresponding to each special sending port according to the indication information sent by the network equipment.

In step 240, the terminal processes each of the special transmitting ports according to a preset rule according to the indication information.

Step 240 is an optional step, and after determining the special transmitting ports and the corresponding special subcarriers, the terminal may process each special transmitting port according to a preset rule (for example, perform filtering processing during subcarrier accumulation and channel estimation; ignore the special subcarriers occupied by the special transmitting ports during subcarrier accumulation, and reduce the influence of the special subcarriers on other subcarriers during joint filtering between subcarriers during channel estimation for the special transmitting ports). In this embodiment, the description is mainly directed to a special sending port, and here, the terminal may also perform subcarrier accumulation on non-special sending ports, and may process all sending ports.

Optionally, the preset rule includes: when each special sending port is processed, the special subcarrier is ignored, and the special processing is carried out on the calculation of the special subcarrier (For example, the weight w of the channel estimation on a particular subcarrier is reduced_i) Or to process channel estimates on specific subcarriers separately, etc.

The method for sending and receiving the indication can enable the terminal to determine which sending ports and the corresponding subcarriers need special consideration through the indication of the network equipment, so that the terminal can perform targeted processing when calculating.

Fig. 5 is a schematic flow chart of an apparatus 500 for sending and receiving indications provided by an embodiment of the present application, shown from the perspective of device interaction. It should be noted that, the present embodiment and the following embodiments are described by taking an example of interaction between a terminal and a network device, and the present application is not limited thereto. For the convenience of understanding of the solution, in the description, the present embodiment and the following embodiments are developed by the behavior of multiple sides of the terminal and the network device, and the overall description is made from the perspective of multiple interaction parties.

The difference between this embodiment and the embodiment corresponding to fig. 2 is that the embodiment of fig. 2 is described from the perspective of indicating a special transmission port and a corresponding special subcarrier, while this embodiment indicates whether a special transmission port exists from the overall perspective of the transmission port, and the same or similar contents as those in the above embodiments are not repeated herein.

As shown in fig. 5, the method 500 of the embodiment of the present application may include steps 510 to 530. The steps in method 500 are described in detail below:

in step 510, the network device generates indication information, where the indication information is used to indicate whether there is a special transmitting port for the downlink reference signal.

Optionally, the embodiment shown in fig. 5 may also adopt the indication methods in the first to fourth manners in the embodiment of fig. 2. If the network device indicates a special sending port to the terminal in the indication manner of the first to fourth manners, the indication information indicates that the special sending port of the downlink reference signal exists.

If the first indication information in the first or second mode is indicated by using a bitmap, if a bit with a value of 1 is located in the bitmap, it can be considered that a special sending port with a downlink reference signal is indicated; if all the bit values are set to 0, it can be considered that the special transmitting port without the downlink reference signal is indicated.

As described in the third to fourth modes, if the special transmission port is indicated by a different predetermined indication value, it is equivalent to indicating that the special transmission port exists, and if the special indication value indicates that the special transmission port does not exist, it is equivalent to that the special transmission port does not exist.

Optionally, if there is a special sending port, the indication information further includes second indication information, where the second indication information is used to indicate a subcarrier that meets a predetermined condition and corresponds to each special sending port. Optionally, the indication manner of the second indication information may refer to the content of indicating the special subcarrier described in the first manner, the second manner, or the fourth manner, which is not described herein again.

Optionally, the indication information further includes third indication information, where the third indication information is used to indicate whether there is a subcarrier meeting a predetermined condition in subcarriers occupied by each transmission port. Optionally, the content of the special subcarrier may be indicated by the second indication information described in the above first mode, the second mode, or the fourth mode, where the indication of the special subcarrier is equivalent to indicating that the special subcarrier exists, and if the second indication information described in the above first mode, the second mode, or the fourth mode indicates that the special subcarrier does not exist, the second indication information is equivalent to that the special subcarrier does not exist.

Optionally, the indication information further includes fourth indication information, where the fourth indication information is used to indicate whether subcarriers meeting a predetermined condition exist in subcarriers occupied by some of all transmission ports of the terminal. Optionally, the content of the special subcarrier may be indicated by the second indication information described in the above first mode, the second mode, or the fourth mode, where the indication of the special subcarrier is equivalent to indicating that the special subcarrier exists, and if the second indication information described in the above first mode, the second mode, or the fourth mode indicates that the special subcarrier does not exist, the second indication information is equivalent to that the special subcarrier does not exist.

Optionally, if there is no special sending port, the indication information may not include the second indication information, the third indication information, or the fourth indication information, or may include fifth indication information, where the fifth indication information is used to indicate that there is no corresponding subcarrier meeting the predetermined condition for each sending port of all sending ports of the terminal.

Optionally, for the relevant content that satisfies the predetermined condition, indicates all the special sending ports or indicates part of the special sending ports when there is a special sending port, and indicates all the special subcarriers or indicates part of the special subcarriers corresponding to each special sending port, similar to the embodiment shown in fig. 2, reference may be made to the description of step 210, which is not described herein again.

In step 520, the network device sends the indication information, and the terminal receives the indication information.

In the embodiment of the application, the form of the indication information is not limited, and the indication information may be directly indicated or indirectly indicated, and the indication may be realized in different indication modes. The indication information may be sent together or separately.

In step 530, according to the indication information, the terminal determines whether the special transmission port exists.

Optionally, if the terminal determines that the special sending port exists, the terminal performs special consideration on the special sending port during calculation, and if the terminal determines that the special sending port does not exist, no special processing is required.

The method for sending and receiving the indication can enable the terminal equipment to determine whether the special sending port exists or not and whether special processing is needed or not through the indication of the network equipment, so that the terminal equipment can perform targeted processing when performing calculation.

The method provided by the embodiment of the present application is described in detail above with reference to fig. 2 to 5. Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to fig. 6 to 8.

Fig. 6 is a schematic block diagram of a communication device provided in an embodiment of the present application. As shown, the communication device 1000 may include a communication unit 1100 and a processing unit 1200.

In one possible design, the communication apparatus 1000 may correspond to the terminal device in the above apparatus embodiment, and may be, for example, the terminal device or a chip configured in the terminal device.

Specifically, the communication apparatus 1000 may correspond to the terminal device in the method 200 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the terminal device in the method 200 in fig. 2. Also, the units in the communication device 1000 and the other operations and/or functions described above are respectively for implementing the corresponding flows of the method 200 in fig. 2.

Wherein, when the communication device 1000 is configured to execute the method 200 in fig. 2, the communication unit 1100 is configured to execute the step 220 in the method 200 related to the step of terminal reception, and the processing unit 1200 is configured to execute the step 230 in the method 200.

Specifically, the communication apparatus 1000 may correspond to the terminal device in the method 500 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the terminal device in the method 500 in fig. 5. Also, the units and other operations and/or functions described above in the communication apparatus 1000 are respectively for implementing the corresponding flow of the method 500 in fig. 5.

Wherein, when the communication device 1000 is configured to perform the method 500 in fig. 5, the communication unit 1100 is configured to perform the step 520 in the method 500 involving the step of receiving by the terminal, and the processing unit 1200 is configured to perform the step 530 in the method 500.

It should be understood that the specific processes of the units for executing the corresponding steps are described in detail in the above device embodiments, and therefore, for brevity, are not described in detail herein.

It is further understood that when the communication apparatus 1000 is a terminal device, the communication unit 1100 in the communication apparatus 1000 may correspond to the transceiver 2020 in the terminal device 2000 shown in fig. 7, and the processing unit 1200 in the communication apparatus 1000 may correspond to the processor 2010 in the terminal device 2000 shown in fig. 7.

It should also be understood that when the communication device 1000 is a chip or a chip system configured in a terminal device, the communication unit 1100 in the communication device 1000 may be an input/output interface, an interface circuit, an output/input circuit, a pin or a related circuit, and the processing unit 1200 may be a processor, a processing circuit or a logic circuit.

Specifically, the communication apparatus 1000 may correspond to the network device in the method 200 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the network device in the method 200 of fig. 2. Also, the units in the communication device 1000 and the other operations and/or functions described above are respectively for implementing the corresponding flows of the method 200 in fig. 2.

Wherein, when the communication apparatus 1000 is configured to execute the method 200 in fig. 2, the communication unit 1100 is configured to execute the step 220 in the method 200 involving the step of the network device transmitting, and the processing unit 1200 is configured to execute the step 210 in the method 200.

Specifically, the communication apparatus 1000 may correspond to the network device in the method 500 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the apparatus executed by the network device in the method 500 of fig. 5. Also, the units and other operations and/or functions described above in the communication apparatus 1000 are respectively for implementing the corresponding flow of the method 500 in fig. 5.

Wherein, when the communication apparatus 1000 is configured to execute the method 500 in fig. 5, the communication unit 1100 is configured to execute the step 520 in the method 500 involving the step of the network device transmitting, and the processing unit 1200 is configured to execute the step 510 in the method 500.

It should also be understood that when the communication apparatus 1000 is a network device, the communication unit in the communication apparatus 1000 may correspond to the transceiver 3200 in the network device 3000 shown in fig. 8, and the processing unit 1200 in the communication apparatus 1000 may correspond to the processor 3100 in the network device 3000 shown in fig. 8.

It should also be understood that when the communication device 1000 is a chip or a system of chips configured in a network device, the communication unit 1100 in the communication device 1000 may be an input/output interface, an interface circuit, an output/input circuit, a pin or a related circuit, and the processing unit 1200 may be a processor, a processing circuit or a logic circuit.

Fig. 7 is a schematic structural diagram of a terminal device 2000 according to an embodiment of the present application. The terminal device 2000 can be applied to the system shown in fig. 1, and performs the functions of the terminal device in the above method embodiment.

As shown, the terminal device 2000 includes a processor 2010 and a transceiver 2020. Optionally, the terminal device 2000 further comprises a memory 2030. The processor 2010, the transceiver 2002 and the memory 2030 may be in communication with each other via the interconnection path to transfer control and/or data signals, the memory 2030 may be used for storing a computer program, and the processor 2010 may be used for retrieving and executing the computer program from the memory 2030 to control the transceiver 2020 to transmit and receive signals. Optionally, the terminal device 2000 may further include an antenna 2040, configured to transmit uplink data or uplink control signaling output by the transceiver 2020 by using a wireless signal.

The processor 2010 and the memory 2030 may be combined into a processing device, and the processor 2010 is configured to execute the program codes stored in the memory 2030 to achieve the above functions. In particular, the memory 2030 may be integrated with the processor 2010 or may be separate from the processor 2010. The processor 2010 may correspond to the processing unit in fig. 6.

The transceiver 2020 may correspond to the communication unit in fig. 6, and may also be referred to as a transceiver unit. The transceiver 2020 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Wherein the receiver is used for receiving signals, and the transmitter is used for transmitting signals.

It should be understood that the terminal device 2000 shown in fig. 7 can implement various processes related to the terminal device in the method embodiments shown in fig. 2 and 5. The operations and/or functions of the modules in the terminal device 2000 are respectively to implement the corresponding flows in the above device embodiments. Reference is made specifically to the description of the embodiments of the apparatus described above, and the detailed description is omitted here as appropriate to avoid repetition.

The processor 2010 may be configured to perform the actions described in the previous apparatus embodiments as being implemented within the terminal device, and the transceiver 2020 may be configured to perform the actions described in the previous apparatus embodiments as being transmitted from the terminal device to the network device or received from the network device. Please refer to the description of the embodiment of the apparatus, which is not repeated herein.

Optionally, the terminal device 2000 may further include a power supply 2050 for supplying power to various devices or circuits in the terminal device.

In addition, in order to further improve the functions of the terminal device, the terminal device 2000 may further include one or more of an input unit 2060, a display unit 2070, an audio circuit 2080, a camera 2090, a sensor 2100, and the like, and the audio circuit may further include a speaker 2082, a microphone 2084, and the like.

Fig. 8 is a schematic structural diagram of a network device provided in the embodiment of the present application, where the network device 3000 may be applied to the system shown in fig. 1, and performs the functions of the network device in the foregoing method embodiments.

In a 5G communication system, the network device 3000 may include CU, DU, and AAU in comparison to the network device in the LTE communication system, which is composed of one or more radio frequency units, such as a Remote Radio Unit (RRU) and one or more baseband units (BBUs):

the non-real-time part of the original BBU is divided and redefined as CU, which is responsible for processing non-real-time protocols and services, part of physical layer processing functions of the BBU, the original RRU and the passive antenna are combined into AAU, and the rest functions of the BBU are redefined as DU and are responsible for processing physical layer protocols and real-time services. In short, CU and DU are distinguished by real-time processing of content, and AAU is a combination of RRU and antenna.

The CU, DU, and AAU may be separately or jointly disposed, so that multiple network deployment forms may occur, one possible deployment form is consistent with the conventional 4G network device as shown in fig. 8, and the CU and DU are deployed in hardware. It should be understood that fig. 8 is only an example, and the scope of protection of the present application is not limited, for example, the deployment modality may also be that the DUs are deployed in the BBU room, the CU is deployed centrally or the DU is deployed centrally, the CU is deployed at a higher level, and the like.

The AAU3100 may implement a transceiving function called a transceiving unit 3100, corresponding to the communication unit 1100 in fig. 6. Alternatively, the transceiving unit 3100 may also be referred to as a transceiver, transceiving circuit, or transceiver, etc., which may comprise at least one antenna 3101 and a radio frequency unit 3102. Alternatively, the transceiving unit 3100 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter, transmitting circuit). The CU and DU3200 may implement internal processing functions referred to as a processing unit 3200, corresponding to processing unit 1200 in fig. 6. Alternatively, the processing unit 3200 may control a network device, etc., and may be referred to as a controller. The AAU, CU and DU may be physically disposed together or may be physically disposed separately.

The network device is not limited to the embodiment shown in fig. 8, and may be in another embodiment: for example: the antenna comprises a BBU (baseband unit) and an Adaptive Radio Unit (ARU), or comprises a BBU and an Active Antenna Unit (AAU); the CPE may be a Customer Premise Equipment (CPE) or another type, and the present application is not limited thereto.

In an example, the processing unit 3200 may be formed by one or more boards, and the boards may jointly support a radio access network of a single access system (e.g., an LTE network), or may respectively support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks). The BBU 3200 also includes a memory 3201 and a processor 3202. The memory 3201 is used to store necessary instructions and data. The processor 3202 is used for controlling the network device to perform necessary actions, for example, for controlling the network device to execute the operation flow related to the network device in the above method embodiment. The memory 3201 and processor 3202 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

It should be understood that the network device 3000 shown in fig. 8 is capable of implementing the network device functions involved in the method embodiments of fig. 2, 5. The operations and/or functions of the units in the network device 3000 are respectively for implementing the corresponding processes executed by the network device in the method embodiment of the present application. To avoid repetition, detailed description is appropriately omitted herein. The structure of the network device illustrated in fig. 8 is only one possible form, and should not limit the embodiments of the present application in any way. This application does not exclude the possibility of other forms of network device architecture that may appear in the future.

The CU and DU3200 described above may be used to perform the actions described in the previous method embodiments that are implemented internally by the network device, while the AAU3100 may be used to perform the actions described in the previous method embodiments that the network device sends to or receives from the terminal device. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

The embodiment of the application also provides a processing device, which comprises a processor and a communication interface; the processor is configured to execute a computer program, so that the processing apparatus implements the method in the above method embodiments.

It should be understood that the processing means described above may be one chip or a system of chips. For example, the processing device may be a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Microcontroller (MCU), a Programmable Logic Device (PLD), or other integrated chips. The communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or system of chips, etc. The processor may also be embodied as a processing circuit or a logic circuit.

In implementation, the steps of the above apparatus may be implemented by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of an apparatus disclosed in the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the device by combining the hardware. To avoid repetition, it is not described in detail here.

It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above device embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor described above may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various means, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the apparatus disclosed in this application can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the device by combining the hardware.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and apparatus described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

According to an apparatus provided by an embodiment of the present application, the present application further provides a computer program product, including: computer program code which, when run on a computer, causes the computer to execute the apparatus of any of the embodiments shown in fig. 2-4.

According to the apparatus provided by the embodiment of the present application, the present application further provides a computer-readable medium, which stores program codes, and when the program codes are executed on a computer, the computer is caused to execute the apparatus of any one of the embodiments shown in fig. 2 to fig. 4.

According to the apparatus provided in the embodiment of the present application, the present application further provides a system, which includes the foregoing one or more terminal devices and one or more network devices.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

The network device in the above-mentioned various device embodiments completely corresponds to the terminal device and the network device or the terminal device in the device embodiments, and the corresponding module or unit executes the corresponding steps, for example, the communication unit (transceiver) executes the steps of receiving or transmitting in the device embodiments, and the steps other than transmitting and receiving may be executed by the processing unit (processor). The function of a particular element may be that of a corresponding device embodiment. The number of the processors may be one or more.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps (step) described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing embodiments of the apparatuses, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and device may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

In the above embodiments, the functions of the functional units may be fully or partially implemented by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). The procedures or functions described in accordance with the embodiments of the present application are generated in whole or in part when the computer program instructions (programs) are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the apparatus according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of receiving an indication, comprising:

a terminal receives indication information from network equipment, wherein the indication information is used for indicating one or more first sending ports of a downlink reference signal, the first sending ports are sending ports of subcarriers meeting a preset condition in subcarriers occupied by the sending ports of the downlink reference signal, the indication information is also used for indicating one or more subcarriers meeting the preset condition corresponding to each first sending port, and the indication information is obtained by the network equipment according to uplink channel information;

and the terminal determines the one or more first sending ports and one or more subcarriers meeting the preset conditions corresponding to each first sending port according to the indication information.

2. The method of claim 1, wherein the predetermined condition comprises:

The transmit power of the subcarriers is zero.

3. The method according to claim 1, further comprising the terminal performing subcarrier accumulation on each of the first transmitting ports according to a preset rule according to the indication information.

4. The method of claim 3, wherein the preset rules comprise:

and when the subcarriers of each first sending port are accumulated, ignoring the subcarriers which meet the preset conditions and correspond to each first sending port.

5. The method according to any of claims 1 to 4, wherein the indication information includes first indication information and second indication information, the first indication information is used to indicate the one or more first transmission ports, and the second indication information is used to indicate one or more subcarriers satisfying a predetermined condition corresponding to each of the first transmission ports.

6. The method according to claim 5, characterized in that said first indication information is carried in a bitmap; the second indication information is carried in L bitmaps, and L is equal to the number of the first sending ports indicated by the first indication information.

7. The method according to claim 5, wherein said first indication information is carried in a bitmap, and said second indication information is one or more indication values; or

The first indication information is an indication value, and the second indication information is carried in one or more bit map.

8. The method according to claim 7, wherein when said first indication information is carried in a bitmap, and said second indication information is one or more indication values, said indication values correspond to the associated first sending ports

The number of one of the cases; n is a positive integer greater than or equal to 1, and is the total number of subcarriers occupied by each first sending port, N₂Less than or equal to N, and the number of the subcarriers which can be indicated by each first sending port at most and meet the preset condition is the number of the subcarriers which can be indicated by each first sending port at most;

when the first indication information is an indication value and the second indication information is carried in one or more bitmap, the indication value corresponds to M sending ports

9. The method according to any of claims 1-4, wherein the indication information is an indication value.

10. The method of claim 9, wherein the indication value corresponds to

11. A method for transmitting an indication, comprising:

generating indication information, where the indication information is used to indicate one or more first sending ports of a downlink reference signal, where the first sending ports are sending ports where subcarriers meeting a predetermined condition exist in subcarriers occupied by the downlink reference signal sending ports, the indication information is also used to indicate one or more subcarriers meeting the predetermined condition corresponding to each first sending port, and the indication information is obtained by a network device according to uplink channel information;

and sending the indication information to the terminal.

12. The method of claim 11, wherein the predetermined condition comprises:

The transmit power of the subcarriers is zero.

13. The method according to claim 11 or 12, wherein the indication information includes first indication information and second indication information, the first indication information is used for indicating the one or more first transmission ports, and the second indication information is used for indicating one or more subcarriers meeting a predetermined condition corresponding to each of the first transmission ports.

14. The method according to claim 13, wherein said first indication information is carried in a bitmap; the second indication information is carried in L bitmaps, and L is equal to the number of the first sending ports indicated by the first indication information.

15. The method according to claim 13, wherein said first indication information is carried in a bitmap, and said second indication information is one or more indication values; or

16. The method according to claim 15, wherein when said first indication information is carried in a bitmap, and said second indication information is one or more indication values, said indication values correspond to the associated first sending ports

17. The method according to claim 11 or 12, wherein the indication information is an indication value.

18. The method of claim 17, wherein the indication value corresponds to

19. An apparatus for receiving an indication, comprising:

a communication unit, configured to receive indication information from a network device, where the indication information is used to indicate one or more first sending ports of a downlink reference signal, where the first sending ports are sending ports where subcarriers meeting a predetermined condition exist in subcarriers occupied by the sending ports of the downlink reference signal, the indication information is also used to indicate one or more subcarriers meeting the predetermined condition corresponding to each of the first sending ports, and the indication information is obtained by the network device according to uplink channel information;

and the processing unit is used for determining the one or more first sending ports and one or more subcarriers which meet the preset conditions and correspond to each first sending port according to the indication information.

20. The apparatus of claim 19, wherein the predetermined condition comprises:

The transmit power of the subcarriers is zero.

21. The apparatus of claim 19, wherein the processing unit is further configured to perform subcarrier accumulation for each of the first transmitting ports according to a preset rule according to the indication information.

22. The apparatus of claim 21, wherein the preset rules comprise:

23. The apparatus according to any of claims 19-22, wherein the indication information comprises first indication information and second indication information, the first indication information is used to indicate the one or more first transmission ports, and the second indication information is used to indicate one or more subcarriers satisfying a predetermined condition corresponding to each of the first transmission ports.

24. The apparatus according to claim 23, wherein said first indication information is carried in a bitmap; the second indication information is carried in L bitmaps, and L is equal to the number of the first sending ports indicated by the first indication information.

25. The apparatus of claim 23, wherein the first indication information is carried in a bitmap, and the second indication information is one or more indication values; or

26. The apparatus of claim 25, wherein when the first indication information is carried in a bitmap and the second indication information is one or more indication values, the indication values correspond to respective indication valuesAssociated with the first sending port

27. The apparatus according to any of claims 19-22, wherein the indication information is an indication value.

28. The apparatus of claim 27, wherein the indication value corresponds to

The number of one of the cases; n is a positive integer greater than or equal to 1, is the total number of downlink reference signal transmitting ports scheduled for the terminal by the network equipment, and N is less than or equal to N and is the number of the first transmitting ports which can be indicated at most; k is a positive integer larger than or equal to 1 and is the total number of subcarriers occupied by each first sending port, and K is smaller than or equal to K and is the number of subcarriers which can be indicated by each first sending port at most and meet the preset condition.

29. An apparatus for transmitting an indication, comprising:

a processing unit, configured to generate indication information, where the indication information is used to indicate one or more first sending ports of a downlink reference signal, where the first sending port is a sending port where a subcarrier meeting a predetermined condition exists in subcarriers occupied by the sending port of the downlink reference signal, and the indication information is also used to indicate one or more subcarriers meeting the predetermined condition corresponding to each first sending port, where the indication information is obtained by a network device according to uplink channel information;

and the communication unit is used for sending the indication information to the terminal.

30. The apparatus of claim 29, wherein the predetermined condition comprises:

The transmit power of the subcarriers is zero.

31. The apparatus according to claim 29 or 30, wherein the indication information includes first indication information and second indication information, the first indication information is used to indicate the one or more first transmission ports, and the second indication information is used to indicate one or more subcarriers satisfying a predetermined condition corresponding to each of the first transmission ports.

32. The apparatus according to claim 31, wherein said first indication information is carried in a bitmap; the second indication information is carried in L bitmaps, and L is equal to the number of the first sending ports indicated by the first indication information.

33. The apparatus of claim 31, wherein the first indication information is carried in a bitmap, and the second indication information is one or more indication values; or

34. The apparatus of claim 33, wherein when the first indication information is carried in a bitmap, and the second indication information is one or more indication values, the indication values correspond to the indication values associated with the first sending ports

35. The apparatus according to claim 29 or 30, wherein the indication information is an indication value.

36. The apparatus of claim 35, wherein the indication value corresponds to

The number of one of the cases; n is a positive integer greater than or equal to 1, and is the total number of downlink reference signal transmission ports scheduled for the terminal by the network device, and N is less than or equal to N, and is the number of the first transmission ports which can be indicated at most; k is positive of 1 or moreAnd an integer which is the total number of the sub-carriers occupied by each first sending port, wherein K is less than or equal to K, and is the number of the sub-carriers which can be indicated by each first sending port at most and meet the preset condition.

37. A processing apparatus comprising a processor and a communication interface through which the processor communicates with the outside, the processor being configured to execute a computer program such that the processing apparatus implements the method of any of claims 1 to 18.

38. A computer-readable medium, comprising a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 18.