CN118282451A

CN118282451A - Channel measurement method and device

Info

Publication number: CN118282451A
Application number: CN202211709408.7A
Authority: CN
Inventors: 袁一凌; 叶宸成; 金黄平; 韩玮
Original assignee: Huawei Technologies Co Ltd; Peng Cheng Laboratory
Current assignee: Huawei Technologies Co Ltd; Peng Cheng Laboratory
Filing date: 2022-12-29
Publication date: 2024-07-02

Abstract

The embodiment of the application provides a channel measurement method and a device capable of avoiding random phase influence, wherein the method comprises the following steps: the terminal equipment receives the reference signals of the network equipment at the first moment and the second moment, and the third moment and the fourth moment receive the reference signals of the network equipment at the fixed port of the network equipment, wherein the terminal equipment does not switch between uplink and downlink between the first moment and the third moment, the terminal equipment does not switch between uplink and downlink between the second moment and the fourth moment, and based on the scheme, the terminal equipment can perform phase compensation on channels measured by the reference signals received at the first moment and the second moment according to the reference signals received at the third moment and the fourth moment, so that the influence of random phase of the terminal equipment side is avoided.

Description

Channel measurement method and device

Technical Field

The embodiment of the application relates to the field of wireless communication, in particular to a method and a device for measuring a channel.

Background

Currently, the fifth generation (5th Generation,5G) communication system has higher requirements on the aspects of system capacity, spectrum efficiency and the like. In a 5G communication system, a large-scale multiple-input multiple-output (MassiveMIMO) technology plays a critical role in the spectral efficiency of the system. When the MIMO technology is adopted, modulation coding and signal precoding are required when the network device transmits data to the terminal device. How the network device performs modulation coding and signal precoding requires the dependence of channel state information (channelstateinformation, CSI) fed back by the terminal device to the network device. For example, for a frequency division duplex (frequency division duplex, FDD) system or a time division duplex (time division duplex, TDD) system, the network device needs to rely on CSI fed back by the terminal device to calculate the precoding.

Under the current protocol, considering the constraint of resources, the number of ports that can be measured by a reference signal (REFERENCE SIGNAL, RS) (for example, a channel state information reference signal (CHANNEL STATE information REFERENCE SIGNAL, CSI-RS)) is limited, and when the antenna specification is large, multiple sets of reference signals need to be configured. If the terminal equipment is switched between uplink and downlink between the sending moments of the two sets of CSI-RS, a random phase is introduced at the terminal equipment side, so that the channel state information fed back by the terminal equipment is inaccurate. How to obtain more accurate channel state information is a problem to be solved.

Disclosure of Invention

The application provides a channel measurement method, which is used for avoiding the influence of random phase introduced by uplink and downlink switching at a terminal device side by determining and compensating a phase difference.

In a first aspect, a channel measurement method is provided. The method may be performed by the terminal device or may be performed by a component (e.g., a chip or a circuit) of the terminal device, which is not limited thereto, and for convenience of description, the following description will be given by taking the embodiment performed by the terminal device.

The method may include: the terminal device receives a first reference signal from the network device at a first time and a second reference signal from the network device at a second time, the first reference signal being used to measure a first channel and the second reference signal being used to measure a second channel. The terminal device receives a third reference signal from the network device at a third time and a fourth reference signal from the network device at a fourth time, where the third reference signal corresponds to at least one first antenna port of the network device and the fourth reference signal corresponds to the at least one first antenna port of the network device. The terminal device does not switch between uplink and downlink in a first period and a second period, wherein the first period is a period between the first time and the third time, and the second period is a period between the second time and the fourth time. The terminal device determines a first phase difference between the first channel and the second channel according to the third reference signal and the fourth reference signal.

Specifically, the at least one first antenna port of the network device may be indicated to the terminal device by the network device, or may be defined by a protocol, which is not limited by the present application.

Based on the scheme, the terminal equipment can estimate the phase difference between the first channel measured by the first reference signal and the second channel measured by the second reference signal by receiving the third reference signal and the fourth reference signal sent by the fixed port of the network equipment, and avoid the influence of random phase on the terminal equipment side by carrying out phase compensation on the measurement result of the channels.

With reference to the first aspect, in certain implementation manners of the first aspect, the third reference signal is used to measure a third channel, the fourth reference signal is used to measure a fourth channel, and the method further includes: the terminal device performs phase compensation for the first channel and the second channel according to the first phase difference, and the first phase difference is a phase difference between the third channel and the fourth channel.

Based on the above scheme, the terminal device can estimate the phase difference between the third channel measured by the third reference signal and the fourth channel measured by the fourth reference signal by receiving the third reference signal and the fourth reference signal sent by the fixed port of the network device, and further estimate the phase difference between the first channel measured by the first reference signal and the second channel measured by the second reference signal, and avoid the influence of the random phase of the terminal device side on the channel measurement by performing phase compensation on the measurement result of the channels.

With reference to the first aspect, in certain implementation manners of the first aspect, the method further includes: the terminal device receives first indication information of the network device, where the first indication information is used to indicate configuration information of the third reference signal and/or configuration information of the fourth reference signal.

Specifically, the configuration information of the third reference signal may include at least one of the following information:

The transmission time of the third reference signal transmitted by the at least one first antenna port of the network device, the transmission period of the third reference signal transmitted by the at least one first antenna port of the network device, the frequency domain bandwidth of the third reference signal transmitted by the at least one first antenna port of the network device, and the like.

Specifically, the configuration information of the fourth reference signal may include at least one of the following information:

The transmission time of the fourth reference signal transmitted by the at least one first antenna port of the network device, the transmission period of the fourth reference signal transmitted by the at least one first antenna port of the network device, the frequency domain bandwidth of the fourth reference signal transmitted by the at least one first antenna port of the network device, and the like.

With reference to the first aspect, in some implementations of the first aspect, the first time and the third time are the same time, and/or the second time and the fourth time are the same time.

With reference to the first aspect, in certain implementation manners of the first aspect, the method further includes: the terminal device receives a fifth reference signal from the network device at a fifth time, where the fifth reference signal is used to measure a fifth channel. The terminal device does not have uplink and downlink switching in a third period, and the third period is a period between the third time and the fifth time. And the terminal equipment performs phase compensation on the fifth channel and the second channel according to the first phase difference.

Based on the above scheme, the terminal device can estimate the phase difference between the third channel measured by the third reference signal and the fourth channel measured by the fourth reference signal by receiving the third reference signal and the fourth reference signal sent by the fixed port of the network device, and further estimate the phase difference between the fifth channel measured by the fifth reference signal and the second channel measured by the second reference signal, and avoid the influence of the random phase of the terminal device side on the channel measurement by performing phase compensation on the measurement result of the channels.

With reference to the first aspect, in certain implementation manners of the first aspect, the first indication information is further used to indicate that the third reference signal is associated with the first reference signal and/or the fifth reference signal.

Specifically, the indication information for indicating that the third reference signal is associated with the first reference signal and/or the fifth reference signal is not limited to the first indication information, but may be carried in other information, for example, the second indication information, which is not limited in the present application.

Specifically, the "the third reference signal is associated with the first reference signal and/or the fifth reference signal" may be that a configuration resource of the third reference signal is associated with a configuration resource of the first reference signal and/or a configuration resource of the fifth reference signal.

Alternatively, the association of the third reference signal with the first reference signal may be that the phase of the third channel measured by the third reference signal is the same as the phase of the first channel measured by the first reference signal.

Alternatively, the association of the third reference signal with the first reference signal may be that there is no uplink and downlink switching between the transmission time of the third reference signal and the transmission time of the first reference signal.

Based on the above scheme, the third reference signal may be associated with at least one reference signal, reducing resource overhead of the third reference signal.

With reference to the first aspect, in certain implementation manners of the first aspect, the first indication information is further used to indicate that the fourth reference signal is associated with the second reference signal.

Specifically, the indication information for indicating that the fourth reference signal is associated with the second reference signal is not limited to the first indication information, but may be carried in other information, such as the third indication information, which is not limited in the present application.

Specifically, the "the fourth reference signal is associated with the second reference signal" may be that a configuration resource of the fourth reference signal is associated with a configuration resource of the second reference signal.

Alternatively, the fourth reference signal and the second reference signal may be associated such that a phase of a fourth channel measured by the fourth reference signal is identical to a phase of a second channel measured by the second reference signal.

Alternatively, the fourth reference signal and the second reference signal may be associated with no uplink or downlink switching between the transmission time of the fourth reference signal and the transmission time of the second reference signal.

Based on the scheme, the downlink and downlink switching of the terminal equipment between the second time and the fourth time is not limited, and the configuration difficulty of the reference signal is reduced.

With reference to the first aspect, in certain implementations of the first aspect, a bandwidth of the third reference signal is smaller than a bandwidth of the first reference signal, and/or a bandwidth of the fourth reference signal is smaller than a bandwidth of the second reference signal.

Based on the above scheme, resource overhead of the third reference signal and the fourth reference signal can be reduced.

In a second aspect, a channel measurement method is provided. The method may be performed by the network device or may be performed by a component (e.g., a chip or a circuit) of the network device, which is not limited thereto, and is described below as being performed by the network device for convenience of description.

The method comprises the following steps: the network device transmits a first reference signal to the terminal device at a first time and a second reference signal to the terminal device at a second time. The network device sends a third reference signal to the terminal device at a third time and sends a fourth reference signal to the terminal device at a fourth time, wherein the third reference signal corresponds to at least one first antenna port of the network device, the fourth reference signal corresponds to the at least one first antenna port of the network device, the terminal device does not have uplink and downlink switching between the first time and the third time, and the terminal device does not have uplink and downlink switching between the second time and the fourth time. The network device receives a channel measurement report from the terminal device.

Based on the above scheme, the network device sends the third reference signal and the fourth reference signal to the terminal device at the fixed port, so that the terminal device can estimate the phase difference between the third channel measured by the third reference signal and the fourth channel measured by the fourth reference signal, further estimate the phase difference between the first channel measured by the first reference signal and the second channel measured by the second reference signal, and avoid the influence of the random phase of the terminal device side on the channel measurement by performing phase compensation on the measurement result of the channels.

With reference to the second aspect, in certain implementation manners of the second aspect, the method further includes: the network device sends first indication information to the terminal device, where the first indication information is used to indicate configuration information of the third reference signal and/or configuration information of the fourth reference signal.

With reference to the second aspect, in some implementations of the second aspect, the first time and the third time are the same time, and/or the second time and the fourth time are the same time.

With reference to the second aspect, in certain implementation manners of the second aspect, the method further includes: the network device sends a fifth reference signal to the terminal device at a fifth time, where the fifth reference signal is used to measure a fifth channel, and the terminal device does not switch between uplink and downlink between the third time and the fifth time.

Based on the above scheme, the network device sends the third reference signal and the fourth reference signal to the terminal device at the fixed port, so that the terminal device can estimate the phase difference between the third channel measured by the third reference signal and the fourth channel measured by the fourth reference signal, further estimate the phase difference between the fifth channel measured by the fifth reference signal and the second channel measured by the second reference signal, and avoid the influence of the random phase of the terminal device side on the channel measurement by performing phase compensation on the measurement result of the channels.

With reference to the second aspect, in certain implementations of the second aspect, the first indication information is further used to indicate that the third reference signal is associated with the first reference signal and/or the fifth reference signal.

With reference to the second aspect, in some implementations of the second aspect, the first indication information is further used to indicate that the fourth reference signal is associated with the second reference signal.

With reference to the second aspect, in certain implementations of the second aspect, a bandwidth of the third reference signal is smaller than a bandwidth of the first reference signal, and/or a bandwidth of the fourth reference signal is smaller than a bandwidth of the second reference signal.

In a third aspect, there is provided a channel measurement apparatus comprising means for performing the method of the first aspect described above, the apparatus for channel measurement being either a terminal device or a chip or circuit provided in the terminal device.

The channel measurement apparatus includes:

A transceiver unit for receiving a first reference signal from the network device at a first time instant and for receiving a second reference signal from the network device at a second time instant, the first reference signal being used for measuring a first channel and the second reference signal being used for measuring a second channel. The transceiver unit is further configured to receive a third reference signal from the network device at a third time, and to receive a fourth reference signal from the network device at a fourth time, where the third reference signal corresponds to at least one first antenna port of the network device, and the fourth reference signal corresponds to the at least one first antenna port of the network device.

And the processing unit is used for not switching uplink and downlink in a first period and a second period, wherein the first period is a period between the first moment and the third moment, and the second period is a period between the second moment and the fourth moment. The processing unit is further configured to determine a first phase difference between the first channel and the second channel according to the third reference signal and the fourth reference signal.

With reference to the third aspect, in some implementations of the third aspect, the third reference signal is used to measure a third channel, the fourth reference signal is used to measure a fourth channel, and the processing unit is further configured to perform phase compensation for the first channel and the second channel according to the first phase difference, where the first phase difference is a phase difference between the third channel and the fourth channel.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to receive first indication information of the network device, where the first indication information is used to indicate configuration information of the third reference signal and/or configuration information of the fourth reference signal.

With reference to the third aspect, in some implementations of the third aspect, the first time and the third time are the same time, and/or the second time and the fourth time are the same time.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to receive a fifth reference signal from the network device at a fifth time, where the fifth reference signal is used to measure a fifth channel. The processing unit is further configured to not switch between uplink and downlink in a third period, where the third period is a period between the third time and the fifth time. The processing unit is further configured to perform phase compensation on the fifth channel and the second channel according to the first phase difference.

With reference to the third aspect, in some implementations of the third aspect, the first indication information is further used to indicate that the third reference signal is associated with the first reference signal and/or the fifth reference signal.

With reference to the third aspect, in some implementations of the third aspect, the first indication information is further used to indicate that the fourth reference signal is associated with the second reference signal.

With reference to the third aspect, in certain implementations of the third aspect, a bandwidth of the third reference signal is smaller than a bandwidth of the first reference signal, and/or a bandwidth of the fourth reference signal is smaller than a bandwidth of the second reference signal.

The explanation and beneficial effects of the content related to the channel measurement device provided in the third aspect can refer to the method shown in the first aspect, which is not described herein.

In a fourth aspect, a channel measurement apparatus is provided, which includes a unit for performing the method shown in the second aspect, where the apparatus may be a network device, or may be implemented by a chip or a circuit disposed in the network device, and the application is not limited to this.

The device comprises:

And the receiving and transmitting unit is used for transmitting the first reference signal to the terminal equipment at the first moment and transmitting the second reference signal to the terminal equipment at the second moment. The transceiver unit is further configured to send a third reference signal to the terminal device at a third time, and send a fourth reference signal to the terminal device at a fourth time, where the third reference signal corresponds to at least one first antenna port of the network device, the fourth reference signal corresponds to the at least one first antenna port of the network device, the terminal device does not switch between uplink and downlink between the first time and the third time, and the terminal device does not switch between uplink and downlink between the second time and the fourth time. The transceiver unit is further configured to receive a channel measurement report from the terminal device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to send first indication information to the terminal device, where the first indication information is used to indicate configuration information of the third reference signal and/or configuration information of the fourth reference signal.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first time and the third time are the same time, and/or the second time and the fourth time are the same time.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to send a fifth reference signal to the terminal device at a fifth time, where the fifth reference signal is used to measure a fifth channel, and the terminal device does not perform uplink and downlink switching between the third time and the fifth time.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first indication information is further used to indicate that the third reference signal is associated with the first reference signal and/or the fifth reference signal.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first indication information is further used to indicate that the fourth reference signal is associated with the second reference signal.

With reference to the fourth aspect, in some implementations of the fourth aspect, a bandwidth of the third reference signal is smaller than a bandwidth of the first reference signal, and/or a bandwidth of the fourth reference signal is smaller than a bandwidth of the second reference signal.

The explanation and advantageous effects of the device related content of the channel measurement provided in the fourth aspect may refer to the method shown in the second aspect, which is not described herein.

In a fifth aspect, there is provided a communication apparatus comprising: a memory for storing a program; at least one processor configured to execute a computer program or instructions stored in a memory to perform a method as possible in the first or second aspect.

In one implementation, the apparatus is a terminal device.

In another implementation, the apparatus is a chip, a system-on-chip, or a circuit for use in a terminal device.

In a sixth aspect, the present application provides a processor configured to perform the method provided in the above aspects.

The operations such as transmitting and acquiring/receiving, etc. related to the processor may be understood as operations such as outputting and receiving, inputting, etc. by the processor, and may be understood as operations such as transmitting and receiving by the radio frequency circuit and the antenna, if not specifically stated, or if not contradicted by actual function or inherent logic in the related description, which is not limited by the present application.

In a seventh aspect, a computer readable storage medium is provided, the computer readable storage medium storing program code for execution by a device, the program code comprising means for performing a possible implementation of the first or second aspect described above.

In an eighth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the possible implementation of the first or second aspect described above.

In a ninth aspect, a chip is provided, the chip includes a processor and a communication interface, the processor reads instructions stored on a memory through the communication interface, and the method of the possible implementation manner of the first aspect or the second aspect is performed.

Optionally, as an implementation manner, the chip further includes a memory, where a computer program or an instruction is stored in the memory, and the processor is configured to execute the computer program or the instruction stored in the memory, where the processor is configured to execute the method of the possible implementation manner of the first aspect or the second aspect when the computer program or the instruction is executed.

In a tenth aspect, a communication system is provided comprising one or more of the above terminal devices and network devices.

Drawings

Fig. 1 shows a schematic diagram of a communication system 100 suitable for use in the present application.

Fig. 2 shows a schematic diagram of a random phase generation provided by the present application.

Fig. 3 is a schematic diagram of a method for avoiding influence of random phase on channel measurement according to the present application.

Fig. 4 shows a schematic diagram of a pilot signal configuration provided by the present application.

Fig. 5 is a schematic diagram of another method for avoiding influence of random phase on channel measurement.

Fig. 6 shows a schematic diagram of another pilot signal configuration provided by the present application.

Fig. 7 shows a schematic block diagram of a communication device 700 provided by the present application.

Fig. 8 shows a schematic block diagram of another communication device 800 provided by the present application.

Fig. 9 shows a schematic diagram of a chip system 900 provided by the present application.

Detailed Description

The technical scheme of the 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, such as: long term evolution (Long TermEvolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunicationsystem, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) telecommunications system, fifth generation (5th Generation,5G) mobile telecommunications system, or new radio access technology (newradio Access Technology, NR). The 5G mobile communication system may include a non-independent networking (non-standalone, NSA) and/or an independent networking (standalone, SA), among others.

The technical scheme provided by the application can be also applied to machine type communication (MACHINE TYPE communication, MTC), inter-machine communication long term evolution (Long Term Evolution-machine, LTE-M), device-to-device (D2D) network, machine-to-machine (machine to machine, M2M) network, internet of things (internet of things, ioT) network or other networks. The IoT network may include, for example, an internet of vehicles. The communication modes in the internet of vehicles system are generally called as vehicle to other devices (V2X, X may represent anything), for example, the V2X may include: vehicle-to-vehicle (vehicle to vehicle, V2V) communication, vehicle-to-infrastructure (vehicle to infrastructure, V2I) communication, vehicle-to-pedestrian communication (vehicle to pedestrian, V2P) or vehicle-to-network (vehicle to network, V2N) communication, etc.

The technical scheme provided by the application can also be applied to future communication systems, such as a sixth generation mobile communication system and the like. The application is not limited in this regard.

In the embodiment of the application, the network device can be any device with a wireless receiving and transmitting function. The apparatus includes, but is not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home NodeB, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WIRELESS FIDELITY, wiFi) system, a wireless relay Node, a wireless backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP), etc., may also be 5G, e.g., NR, a gNB in a system, or a transmission point (TRP or TP), one or a group of base stations (including multiple antenna panels) antenna panels in a 5G system, or may also be a network Node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a centralized unit (centralized unit, CU) and DUs. The gNB may also include an active antenna unit (ACTIVE ANTENNA units, AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB, e.g. the CU is responsible for handling non-real time protocols and services, implementing radio resource control (radio resourcecontrol, RRC), packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) layer functions. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC) layer, medium access control (medium access control, MAC) layer, and Physical (PHY) layer. The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may be eventually changed into or converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. It is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which the present application is not limited to.

The network device provides services for the cell, and the terminal device communicates with the cell through transmission resources (e.g., frequency domain resources, or spectrum resources) allocated by the network device, where the cell may belong to a macro base station (e.g., macro eNB or macro gNB, etc.), or may belong to a base station corresponding to a small cell (SMALL CELL), where the small cell may include: urban cells (metrocell), micro cells (pico cells), pico cells (femto cells), femto cells (femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

In the embodiment of the present application, the terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment.

The terminal device may be a device providing voice/data connectivity to a user, e.g., a handheld device with wireless connectivity, an in-vehicle device, etc. Currently, some examples of terminals may be: a mobile phone (mobile phone), a tablet (pad), a computer with wireless transceiver function (such as a notebook, a palm computer, etc.), a mobile internet device (mobile INTERNET DEVICE, MID), a Virtual Reality (VR) device, an augmented reality (augmentedreality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in telemedicine (remote media), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a session initiation protocol (sessioninitiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal DIGITAL ASSISTANT, PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in smart city (SMART CITY), or a future evolution network (public network public land mobile network, etc.).

The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wearing and developing wearable devices by applying a wearable technology, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

The terminal device may also be a terminal device in an internet of things (internet of things, ioT) system. IoT is an important component of future information technology development, and its main technical feature is to connect an item with a network through a communication technology, so as to implement man-machine interconnection and an intelligent network for object interconnection. IoT technology can enable massive connectivity, deep coverage, and terminal power saving through, for example, narrowband NB technology.

In addition, the terminal device may further include sensors such as an intelligent printer, a train detector, and a gas station, and the main functions include collecting data (part of the terminal device), receiving control information and downlink data of the network device, and transmitting electromagnetic waves to transmit uplink data to the network device.

To facilitate understanding of the embodiments of the present application, a communication system suitable for the method provided in the embodiment of the present application will be described in detail with reference to fig. 1. Fig. 1 shows a schematic diagram of a communication system 100 suitable for use in the method provided by an embodiment of the application. As shown, the communication system 100 may include at least one network device, such as network device 101 in the 5G system shown in fig. 1. The communication system 100 may also comprise at least one terminal device, such as the terminal devices 102 to 107 shown in fig. 1. Wherein the terminal devices 102 to 107 may be mobile or stationary. One or more of network device 101 and terminal devices 102-107 may each communicate over a wireless link. Each network device may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area. For example, the network device may send configuration information to the terminal device, and the terminal device may send uplink data to the network device based on the configuration information; as another example, the network device may send downstream data to the terminal device. Thus, the network device 101 and the terminal devices 102 to 107 in fig. 1 constitute one communication system.

Alternatively, the terminal devices may communicate directly with each other. Direct communication between the terminal devices may be achieved, for example, using D2D technology or the like. As shown in the figure, communication may be directly performed between the terminal devices 105 and 106 and between the terminal devices 105 and 107 using D2D technology. Terminal device 106 and terminal device 107 may communicate with terminal device 105 separately or simultaneously.

Terminal devices 105 to 107 may also communicate with network device 101, respectively. For example, may communicate directly with network device 101, as terminal devices 105 and 106 in the figures may communicate directly with network device 101; or indirectly with the network device 101, as in the figure the terminal device 107 communicates with the network device 101 via the terminal device 106.

It should be appreciated that fig. 1 illustrates schematically one network device and a plurality of terminal devices, as well as communication links between the communication devices. Alternatively, the communication system 100 may include a plurality of network devices, and the coverage area of each network device may include other numbers of terminal devices, such as more or fewer terminal devices. The application is not limited in this regard.

Each of the above-described communication apparatuses, such as the network apparatus 101 and the terminal apparatuses 102 to 107 in fig. 1, may be configured with a plurality of antennas. The plurality of antennas may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. In addition, each communication device may additionally include a transmitter chain and a receiver chain, each of which may include a plurality of components (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.) associated with the transmission and reception of signals, as will be appreciated by one skilled in the art. Thus, communication between the network device and the terminal device may be via multiple antenna technology.

Optionally, the wireless communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited thereto according to the embodiments of the present application.

In order to facilitate understanding of the embodiments of the present application, the following description will be given for the terms involved in the embodiments of the present application.

1. Precoding technology: the network device can process the signal to be transmitted by means of the precoding matrix matched with the channel resource under the condition that the channel state is known, so that the precoded signal to be transmitted is matched with the channel, and the complexity of eliminating the influence among the channels by the terminal device is reduced. Thus, by precoding the signal to be transmitted, the received signal quality (e.g., signal-to-interference plus noise ratio (signal to interference plus noise ratio, SINR), etc.) is improved. Thus, with precoding techniques, it is possible to achieve transmission of a transmitting device (e.g., a network device) and multiple receiving devices (e.g., terminal devices) on the same time-frequency resource, i.e., achieve multi-user multiple-input multiple-output (multiple user multiple input multiple output, MU-MIMO). It should be noted that the description of the precoding technology is merely exemplary for easy understanding, and is not intended to limit the protection scope of the embodiments of the present application. In a specific implementation, the transmitting device may also perform precoding in other manners. For example, when channel information (such as, but not limited to, a channel matrix) cannot be known, precoding is performed using a pre-set precoding matrix or a weighting method. For brevity, the details thereof are not described in detail herein.

2. Channel state information report (CHANNEL STATE information report, CSI report):

in a wireless communication system, information describing channel properties of a communication link is reported by a receiving end (e.g., a terminal device) to a transmitting end (e.g., a network device). CSIreport may include, for example, but are not limited to: precoding matrix indication (precoding matrix indicator, PMI), rank Indication (RI), channel quality indication (channel quality indicator, CQI), channel state information reference signal (CHANNEL STATE informationreference signal, CSI-RS) resource indication (CSI-RS resource indicator, CRI), layer indication (layerindicator, LI), and so on. It should be understood that the above listed details of CSI are merely exemplary and should not be construed as limiting the present application in any way. The CSI may include one or more of the items listed above, and may also include other information for characterizing CSI in addition to the above list, as the application is not limited in this respect.

3. Channel reciprocity:

In time division duplex (time division duplexing, TDD) mode, the uplink and downlink channels transmit signals on different time domain resources on the same frequency domain resource. The channel fading experienced by the signals on the uplink and downlink channels can be considered the same within 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 the reciprocity of the uplink and downlink channels, the network device may measure the uplink channel based on an uplink reference signal, such as a sounding reference signal (soundingreference signal, SRS), and may estimate the downlink channel based on the uplink channel, so that a precoding matrix for downlink transmission may be determined.

The uplink and downlink channels in the frequency division duplex (frequency division duplexing, FDD) mode have partial reciprocity, for example, angle reciprocity and delay reciprocity, in other words, delay and angle uplink and downlink channels in the FDD mode have reciprocity. Thus, the angle and the time delay may also be referred to as reciprocity parameters.

Since signals may travel multiple paths from the transmit antenna to the receive antenna as they travel through the wireless channel. Multipath delays cause frequency selective fading, i.e., variations in the frequency domain channel. The time delay is the transmission time of the wireless signal on different transmission paths, and is determined by the distance and the speed, and has no relation with the frequency domain of the wireless signal. When signals are transmitted on different transmission paths, different transmission delays exist due to different distances. Thus, the uplink and downlink channels with delay in FDD mode may be considered the same, or reciprocal.

4. Reference signal (REFERENCE SIGNAL, RS):

The reference signal may also be referred to as a pilot (pilot) signal, a reference sequence, etc. 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 (CHANNEL STATE information REFERENCE SIGNAL, CSI-RS) for downlink channel measurement, or may be a Sounding REFERENCE SIGNAL (SRS) for uplink channel measurement. It should be understood that the above listed reference signals are merely examples and should not be construed as limiting the application in any way. The application does not exclude the possibility of defining other reference signals in future protocols to achieve the same or similar functionality.

The precoded reference signal may be a reference signal obtained by precoding the reference signal. The precoding may specifically include beamforming (beamforming) and/or phase rotation. The beamforming may be implemented, for example, by precoding the downlink reference signal based on one or more angle vectors, and the phase rotation may be implemented, for example, by precoding the downlink reference signal with one or more delay vectors.

In the embodiment of the present application, the reference signal may be, for example, CSI-RS.

The CSI-RS may be classified into the following three CSI-RS according to their transmission behavior in the time domain:

(1) Periodic CSI-RS:

For periodic CSI-RS, the network device may configure it with one transmission period, e.g., CSI-RS may repeat every minimum of 4 slots, and a maximum of 640 slots.

(2) Semi-static CSI-RS:

for semi-static CSI-RS, the network device will also configure a transmission period, but the specific transmission depends on the explicit activation of the MAC control element, which upon activation will continue to periodically transmit until an explicit deactivation command is received to stop transmitting.

(3) Aperiodic CSI-RS:

For aperiodic CSI-RS, the network device does not configure a transmission period for it, but explicitly signals each CSI-RS transmission.

5. Port (port):

The ports may be referred to as antenna ports. It is understood as a transmitting antenna identified by the receiving device or a transmitting antenna that is spatially distinguishable. One antenna port may be preconfigured for each virtual antenna, each virtual antenna may be a weighted combination of multiple physical antennas, each antenna port may correspond to one reference signal, and thus each antenna port may be referred to as a port of one reference signal, e.g., CSI-RS port, SRS port, etc. In the embodiment of the present application, the ports may refer to a reference signal transmitting port and a transmitting antenna port, for example, the reference signal of each port may be a reference signal that is not precoded, or may be a precoded reference signal obtained by precoding a reference signal based on at least one delay vector; the ports may also refer to reference signal ports after beamforming, for example, a reference signal corresponding to each port may be a precoded reference signal obtained by precoding a reference signal based on an angle vector, or may be a precoded reference signal obtained by precoding a reference signal based on an angle vector and a delay vector. The signal for each port may be transmitted through one or more Resource Blocks (RBs).

The transmit antenna port may be referred to as an actual independent transmit unit (TRANSCEIVER UNIT, txRU). It will be appreciated that if the reference signal is spatially precoded, the number of ports may refer to the number of reference signal ports, which may be less than the number of transmit antenna ports.

In the embodiments shown below, when reference is made to transmit antenna ports, it may refer to the number of ports that are not spatially precoded. I.e. the actual number of independent transmission units. Where ports are referred to, in different embodiments, they may be referred to as transmit antenna ports or reference signal ports. The particular meaning expressed by a port may be determined according to particular embodiments.

6. Frequency domain unit: the units of frequency domain resources may represent different granularity of frequency domain resources. The frequency domain unit may include, for example, but not limited to, one subband (subband), one Resource Block (RB), one subcarrier, one resource block group (resource block group, RBG), or one precoding resource block group (precoding resource blockgroup, PRG), etc. In addition, the frequency domain length of one frequency domain unit can be Y times of the CQI subband, Y < = 1, and the value of Y can be 1 or 1/2.

It will be appreciated that the term "and/or" is merely one association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The terms related to the present application are briefly described above, and will not be repeated in the following examples. The communication method provided by the embodiment of the application will be described in detail below with reference to the accompanying drawings. The embodiment provided by the application can be applied to the network architecture shown in fig. 1, and is not limited.

In addition, ordinal terms such as "first," "second," and the like in the embodiments of the present application are used for distinguishing a plurality of objects, and are not used to limit the size, content, order, timing, priority, importance, and the like of the plurality of objects. For example, the first threshold value and the second threshold value may be the same threshold value or different threshold values, and the names do not indicate the difference in the values of the two threshold values, the corresponding parameters, the priorities, the importance, or the like.

In the embodiments of the present application, the number of nouns, unless otherwise indicated, means "a singular noun or a plural noun", i.e. "one or more". "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. For example, A/B, means: a or B. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c, represents: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b, c may be single or plural.

Currently, the fifth generation (5th Generation,5G) communication system has higher requirements on the aspects of system capacity, spectrum efficiency and the like. In a 5G communication system, a large-scale multiple-input multiple-output (MassiveMIMO) technology plays a critical role in the spectral efficiency of the system. When the MIMO technology is adopted, modulation coding and signal precoding are required when the network device transmits data to the terminal device. How the network device performs modulation coding and signal precoding requires the dependence of channel state information (channelstateinformation, CSI) fed back by the terminal device to the network device. For example, for a frequency division duplex (frequency division duplex, FDD) system, since the uplink channel and the downlink channel do not have channel reciprocity, the precoding needs to be calculated depending on CSI fed back by the terminal device; for a time division duplex (time division duplex, TDD) system, although the network device can use reciprocity of an uplink channel and a downlink channel to obtain channel information of the downlink channel, for a far-point user, the signal-to-noise ratio of an uplink reference signal is low, the channel estimation is poor, and the network device also needs to rely on CSI fed back by a terminal device to calculate precoding.

As the antenna scale increases, there are more and more antenna ports that need to be measured. The number of ports that a reference signal (REFERENCE SIGNAL, RS), e.g., a channel state information reference signal (CHANNEL STATE information referencesignal, CSI-RS), may measure is limited in view of constraints of time-frequency resources. When the antenna size is large, multiple sets of reference signals need to be configured to measure all antenna ports. If the terminal equipment has uplink transmission between the sending moments of the two sets of CSI-RS, different random phases can be introduced at the terminal equipment side due to the fact that the terminal equipment needs to switch the radio frequency circuit, so that the random phase difference exists between channels obtained by measuring the two sets of CSI-RS by the terminal equipment, and further the fed back channel state information is inaccurate.

Next, a process of generating a random phase by the terminal device is described as shown in fig. 2.

In a certain frequency domain unit, the channel obtained by transmitting the CSI-RS measurement through the antenna port for the first time is recorded as The channel obtained by transmitting the CSI-RS measurement through the antenna port for the second time is recorded asWherein N _rx represents the port number of the terminal equipment side for receiving the CSI-RS, N _port1 represents the port number of the network equipment for transmitting the CSI-RS for the first time, N _port2 represents the port number of the network equipment for transmitting the CSI-RS for the second time,The random phase difference caused by the random phase introduced by the uplink transmission of the terminal equipment between two CSI-RS transmissions is represented, phi is a diagonal matrix, and the ith diagonal element represents the random phase difference caused by the random phase corresponding to the ith port for receiving the CSI-RS at the terminal equipment side.

If the first measured channel is spliced with the second measured channel, H _cat＝[H₁,ΦH₂ can be obtained, and at this time, a random phase difference phi appears in the channel spliced by the first measurement and the second measurement.

Illustratively, if consider a covariance matrix that can be used for network device precoding, then the covariance matrix isThe covariance matrix also comprises a random phase difference phi, so that the subsequent precoding process of the network equipment is affected, and the precoding calculation of the network equipment is inaccurate.

Currently, in order to avoid a random phase difference between channels measured by two CSI-RS, it is required that no uplink transmission exists between the time points of the two CSI-RS transmissions. However, as the antenna size increases, there are more antenna ports to be measured and more CSI-RS to be transmitted. If no uplink transmission exists between the CSI-RSs, the configuration requirement on the CSI-RS resources is high, and even the configuration of the CSI-RS resources can not be realized, so that the flexibility is poor.

The present application provides a method for avoiding the influence of random phase on channel measurement, as shown in fig. 3.

Optionally, in step S310, the network device sends first indication information to the terminal device, where the first indication information is used to indicate pilot resource configurations of X reference ports of the terminal device.

Or the X reference ports may be specified according to a protocol.

In step S312, at the first moment, the network device transmits CSI-RS to the terminal device at M antenna ports and pilot signal #1 at X reference ports.

Specifically, the X reference ports may be referred to as reference ports, which are ports fixed by the network device, and none of the X reference ports is changed when the network device transmits CSI-RS at different times.

Specifically, the pilot signal #1 may be a CSI-RS or other reference signals, which is not limited in the present application.

In step S314, at the second moment, the terminal device performs uplink transmission.

In step S316, at the third moment, the network device transmits CSI-RS to the terminal device at N antenna ports, and transmits pilot signal #2 at the above X reference ports.

Specifically, the pilot signal #2 may be the same as or different from the pilot signal #1, which is not limited in the present application.

Specifically, the pilot signals #1 and #2 may be referred to as reference port pilot signals.

The M antenna ports and the N antenna ports may be antenna ports for joint measurement. Illustratively, the network device is an antenna port of 64Tx64Rx, and is limited by resource constraints, CSI-RS transmitted at a first time is used to measure 32 antenna ports, and CSI-RS transmitted at a third time is used to measure another 32 antenna ports. The specific values of M and N may be configured according to actual needs, which is not limited in the present application.

Specifically, M and N may be equal to each other, for example, 32. If M is 32, the X antenna ports may be configured as a part of the 32 ports or may be a part of the ports other than the 32 ports, which is not limited in the present application.

Between two CSI-RSs for joint measurement, the terminal device performs uplink transmission, so the terminal device needs to switch radio frequency circuits, and introduces a random phase difference Φ.

Specifically, the schematic diagrams of the M antenna ports and the N antenna ports, and the X antenna ports may be shown in fig. 4.

In step S318, the terminal device measures channel #1 corresponding to the X antenna ports transmitting pilot signal #1 at the first time, and measures channel #2 corresponding to the X antenna ports transmitting pilot signal #2 at the third time, and calculates random phase difference #1 between the channel #1 and the channel # 2.

Illustratively, the first time is t _k and the third time is t _k+1. Channel #1 isChannel #2 isWherein N _rx represents the port number of the CSI-RS received by the terminal device at time t _k, and N _ref represents the port number X of the CSI-RS transmitted by the network device. Then, on the current frequency domain unit, the random phase difference #i introduced by the i-th receiving port of the terminal device between the time t _k and the time t _k+1 can be expressed as the following formula 1:

The phase difference #1 introduced by all the receiving ports on the terminal device side between the time t _k and the time t _k+1 can be obtained by the above formula 1. Wherein H (i: in the above formula 1) represents the ith row of the H matrix, |H (i: i) represents the modulus of the ith row vector of the H matrix.

If the random phase differences on the different frequency domain units are the same, the random phase differences generated by the different frequency domain units can be averaged to obtain a final random phase difference estimate, as shown in the following formula 2:

Wherein N _f in the above formula 2 represents the number of frequency domain units, Φ _ii (f) represents the random phase difference #i calculated by the above formula 1 on the frequency domain unit f.

Or the channel estimation corresponding to different frequency domain units can be spliced to obtain a matrix H with a dimension of N _rx×N_refN_f, and then the calculated random phase difference #1 can be used for phase compensation during channel splicing according to the formula 1.

In step S320, the terminal device measures channel #3 corresponding to the M antenna ports for transmitting CSI-RS at the first moment, measures channel #3 corresponding to the N antenna ports for transmitting CSI-RS at the third moment, and compensates the random phase of channel #3 and channel #4 according to the random phase difference # 1.

Specifically, since the pilot signal #1 transmitted at the first time and the CSI-RS transmitted at the first time have the same random phase and the pilot signal #2 transmitted at the third time and the CSI-RS transmitted at the third time have the same random phase, it is possible to estimate the random phase difference of the channel #3 corresponding to the CSI-RS transmitted at the first time and the channel #4 corresponding to the CSI-RS transmitted at the third time from the random phase difference #1 of the channel #1 corresponding to the pilot signal #1 and the channel #2 corresponding to the pilot signal #2 and compensate the random phase of the channel #3 and the channel # 4.

In step S322, the terminal device sends a channel state information report to the network device, and feeds back the channel state information.

According to the method, a part of antenna ports of the network equipment are used as fixed reference ports, pilot signals of the reference ports and the CSI-RS are transmitted simultaneously, and the phase difference of the corresponding channels of the CSI-RS is estimated through the phase difference of the corresponding channels of the pilot signals of the reference ports, so that phase compensation is carried out on the channels for joint measurement, and the accuracy of precoding of the network equipment is improved.

In the above embodiment, the network device transmits the reference port pilot signal every time the CSI-RS are transmitted, and if there is no uplink transmission of the terminal device between the time points of the multiple CSI-RS transmissions, the random phases of the multiple reference port pilot signal transmissions corresponding to the multiple CSI-RS transmissions are the same, so it is unnecessary to configure the reference port pilot signal for each CSI-RS transmission in the multiple CSI-RS transmissions, which may result in waste of reference port pilot signal resources.

The application provides a method capable of avoiding influence of random phase on channel measurement and reducing pilot frequency resource waste, as shown in fig. 5.

Optionally, in step S510, the network device sends first indication information to the terminal device, where the first indication information is used to indicate a pilot resource configuration of X reference ports of the terminal device, a plurality of reference signal resources or resource configurations associated with the pilot resources or resource configurations of the X reference ports, and a pilot resource or resource configuration associated with each reference signal resource or resource configuration.

Specifically, the pilot resource configuration of the X reference ports includes at least one of the following information:

The transmission time of the pilot signal, the transmission period of the pilot signal, and the like.

Specifically, the reference signal resource configuration includes at least one of the following information:

The transmission time of the reference signal, the transmission period of the reference signal, etc., which may be the CSI-RS.

Or the X reference ports may be specified according to a protocol.

In step S512, at the fourth moment, the network device sends CSI-RS to the terminal device at M antenna ports.

In step S514, at the fifth moment, the network device transmits pilot signal #1 at the X reference ports.

In step S516, at the sixth moment, the network device sends CSI-RS to the terminal device at N antenna ports.

In step S518, at the seventh moment, the terminal device performs uplink transmission.

Specifically, the pilot signal #1 has an association relationship with CSI-RS transmitted at the fourth time and the sixth time. It is also considered that the random phase of the CSI-RS transmitted at the fourth time and the sixth time is identical to the random phase of the pilot signal #1 transmitted at the fifth time.

Additionally, there is no uplink transmission between the time when the pilot signal #1 is transmitted and the time when the fourth time CSI-RS is transmitted, and there is no uplink transmission between the time when the pilot signal #1 is transmitted and the time when the sixth time CSI-RS is transmitted.

In step S520, at the eighth moment, the network device sends CSI-RS to the terminal device at the P antenna ports.

In step S522, at the ninth time, the network device transmits the pilot signal #2 through the X antenna ports.

Specifically, the pilot signal #2 has an association relationship with the CSI-RS transmitted at the eighth time. The random phase of the CSI-RS transmitted at the eighth time may be the same as the random phase of the pilot signal #2 transmitted at the ninth time.

Additionally, there is no uplink transmission between the time when the pilot signal #2 is transmitted and the time when the eighth time CSI-RS is transmitted.

Specifically, schematic diagrams of the M antenna ports, the N antenna ports, the P antenna ports, and the X antenna ports may be as shown in fig. 6.

In step S524, the terminal device measures channel #5 corresponding to the X antenna ports transmitting pilot signal #1 at the fifth time, and measures channel #6 corresponding to the X antenna ports transmitting pilot signal #2 at the ninth time, and calculates random phase difference #2 between the channel #5 and the channel #6 according to the above formula 1.

In step S526, the terminal device measures channel #7 corresponding to the M antenna ports transmitting CSI-RS at the fourth time, measures channel #8 corresponding to the P antenna ports transmitting CSI-RS at the eighth time, and compensates for the random phases of channel #7 and channel #8 according to the random phase difference #2.

Or the terminal equipment measures the channel #9 corresponding to the N antenna ports for transmitting the CSI-RS at the sixth moment, measures the channel #8 corresponding to the P antenna ports for transmitting the CSI-RS at the eighth moment, and compensates the random phases of the channel #9 and the channel #8 according to the random phase difference # 2.

In step S528, the terminal device sends a channel state information report to the network device, and feeds back the channel state information.

According to the method, a part of antenna ports of the network equipment are used as fixed reference ports, and the phase difference of the channel corresponding to the CSI-RS is estimated through the phase difference of the channel corresponding to the pilot signal of the reference ports, so that the phase compensation is carried out on the channel for joint measurement, and the accuracy of precoding of the network equipment is improved. In addition, no association relation is established between the reference port pilot signals switched between the uplink and the downlink and the plurality of CSI-RSs, so that the resource cost for configuring one reference port pilot signal for each CSI-RS is reduced.

In general, the random phase differences generated by different frequency domain units are the same, so that the bandwidth of the pilot signal of the reference port can be smaller than the bandwidth of at least one reference signal resource associated with the pilot, and the overhead of the pilot can be further reduced.

It will be appreciated that the examples of fig. 3-6 in the embodiments of the present application are merely for convenience of those skilled in the art to understand the embodiments of the present application, and are not intended to limit the embodiments of the present application to the specific scenarios illustrated. It will be apparent to those skilled in the art from the examples of fig. 3-6 that various equivalent modifications or variations can be made, and such modifications or variations are intended to be within the scope of the embodiments of the present application.

It will also be appreciated that some optional features of the various embodiments of the application may, in some circumstances, be independent of other features or may, in some circumstances, be combined with other features, without limitation.

It is also to be understood that the aspects of the embodiments of the application may be used in any reasonable combination, and that the explanation or illustration of the various terms presented in the embodiments may be referred to or explained in the various embodiments without limitation.

It should be further understood that the magnitude of the various numerical numbers in the embodiments of the present application does not mean the order of execution, but merely serves to distinguish between the convenience of description and the implementation of the embodiments of the present application, and should not constitute any limitation.

It should be further understood that, in the embodiments of the present application, some message names, such as first indication information, etc., are referred to, and it should be understood that the naming thereof does not limit the protection scope of the embodiments of the present application.

It should also be understood that, in the foregoing embodiments of the methods and operations implemented by the terminal device, the methods and operations may also be implemented by component parts (e.g., chips or circuits) of the terminal device; furthermore, the methods and operations implemented by the network device may also be implemented by, but not limited to, constituent components (e.g., chips or circuits) of the network device. Corresponding to the methods given by the above method embodiments, the embodiments of the present application also provide corresponding apparatuses, where the apparatuses include corresponding modules for executing the above method embodiments. The module may be software, hardware, or a combination of software and hardware. It will be appreciated that the technical features described in the method embodiments described above are equally applicable to the device embodiments described below.

It should be understood that the network device or the terminal device may perform some or all of the steps in the above embodiments, which are only examples, and that the embodiments of the present application may also perform other operations or variations of the various operations. Furthermore, the various steps may be performed in a different order presented in the above embodiments, and it is possible that not all of the operations in the above embodiments are performed.

The method of communication provided by the embodiment of the present application is described in detail above with reference to fig. 3 to 6, and the communication device provided by the embodiment of the present application is described in detail below with reference to fig. 7 to 9. It should be understood that the descriptions of the apparatus embodiments and the descriptions of the method embodiments correspond to each other, and thus, descriptions of details not shown may be referred to the above method embodiments, and for the sake of brevity, some parts of the descriptions are omitted.

Fig. 7 is a schematic block diagram of a communication device provided by an embodiment of the present application. The apparatus 700 comprises a transceiver unit 710, the transceiver unit 710 being operable to implement corresponding communication functions. The transceiver unit 710 may also be referred to as a communication interface or a communication unit.

Optionally, the apparatus 700 may further comprise a processing unit 720, and the processing unit 720 may be configured to perform data processing.

Optionally, the apparatus 700 further includes a storage unit, where the storage unit may be configured to store instructions and/or data, and the processing unit 720 may read the instructions and/or data in the storage unit, so that the apparatus implements actions of different terminal devices in the foregoing method embodiments, for example, actions of a network device or a terminal device.

The apparatus 700 may be configured to perform the actions performed by the network device or the terminal device in the above method embodiments, where the apparatus 700 may be the network device or the terminal device, or a component of the network device or the terminal device, the transceiver unit 710 is configured to perform operations related to the transceiver of the network device or the terminal device in the above method embodiments, and the processing unit 720 is configured to perform operations related to the processing of the network device or the terminal device in the above method embodiments.

It should also be appreciated that the apparatus 700 herein is embodied in the form of functional units. The term "unit" herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it will be understood by those skilled in the art that the apparatus 700 may be specifically configured to be a network device or a terminal device in the foregoing embodiments of the method, and may be used to perform each flow and/or step corresponding to the network device or the terminal device in the foregoing embodiments of the method, or the apparatus 600 may be specifically configured to be a network device or a terminal device in the foregoing embodiments of the method, and may be used to perform each flow and/or step corresponding to the network device or the terminal device in the foregoing embodiments of the method, which are not repeated herein to avoid repetition.

The apparatus 700 of each of the above aspects has a function of implementing the corresponding step performed by the network device or the terminal device in the above method, or the apparatus 700 of each of the above aspects has a function of implementing the corresponding step performed by the network device or the terminal device in the above method. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions; for example, the transceiver unit may be replaced by a transceiver (e.g., a transmitting unit in the transceiver unit may be replaced by a transmitter, a receiving unit in the transceiver unit may be replaced by a receiver), and other units, such as a processing unit, etc., may be replaced by a processor, to perform the transceiver operations and related processing operations in the various method embodiments, respectively.

The transceiver unit 710 may be a transceiver circuit (e.g., may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.

It should be noted that the apparatus in fig. 7 may be the device in the foregoing embodiment, or may be a chip or a chip system, for example: system on chip (SoC). The receiving and transmitting unit can be an input and output circuit and a communication interface; the processing unit is an integrated processor or microprocessor or integrated circuit on the chip. And are not limited herein.

As shown in fig. 8, an embodiment of the present application provides another communication device 800. The apparatus 800 comprises a processor 810, the processor 810 being coupled to a memory 820, the memory 820 being for storing computer programs or instructions and/or data, the processor 810 being for executing the computer programs or instructions stored by the memory 820 or for reading data stored by the memory 820 for performing the methods in the method embodiments above.

Optionally, the processor 810 is one or more.

Optionally, the memory 820 is one or more.

Alternatively, the memory 820 may be integrated with the processor 810 or provided separately.

Optionally, as shown in fig. 8, the apparatus 800 further comprises a transceiver 830, the transceiver 830 being used for receiving and/or transmitting signals. For example, the processor 810 is configured to control the transceiver 830 to receive and/or transmit signals.

As an aspect, the apparatus 800 is configured to implement the operations performed by the network device or the terminal device in the above method embodiments.

For example, the processor 810 is configured to execute computer programs or instructions stored in the memory 820 to implement the relevant operations of the terminal device in the above respective method embodiments. For example, the terminal device in any of the embodiments shown in fig. 3 to 6, or the method of the terminal device in any of the embodiments shown in fig. 3 to 6.

It should be appreciated that the processor referred to in the embodiments of the present application may be a central processing unit (central processing unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL processors, DSPs), application Specific Integrated Circuits (ASICs), off-the-shelf programmable gate arrays (fieldprogrammable GATE ARRAY, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory referred to in embodiments of the present application may be volatile memory and/or nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an erasable programmable ROM (erasable PROM), an electrically erasable programmable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM). For example, RAM may be used as an external cache. By way of example, and not limitation, RAM includes the following forms: static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (double DATA RATESDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, the memory (storage module) may be integrated into the processor.

It should also be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Referring to fig. 9, an embodiment of the present application provides a chip system 900. The system-on-chip 900 (or may also be referred to as a processing system) includes logic 910 and input/output interface 920.

Logic 910 may be a processing circuit in system on a chip 900. Logic 910 may be coupled to a memory unit to invoke instructions in the memory unit so that system-on-chip 900 can implement the methods and functions of embodiments of the present application. The input/output interface 920 may be an input/output circuit in the chip system 900, outputting information processed by the chip system 900, or inputting data or signaling information to be processed into the chip system 900 for processing.

As an aspect, the chip system 900 is configured to implement the operations performed by the network device or the terminal device in the above method embodiments.

For example, the logic 910 is configured to implement the operations related to processing by the terminal device in the above method embodiment, such as the operations related to processing by the terminal device in the embodiment shown in any one of fig. 3 to 6; the input/output interface 920 is used to implement the operations related to transmission and/or reception by the terminal device in the above method embodiment, such as the operations related to transmission and/or reception performed by the terminal device in the embodiment shown in any one of fig. 3 to 6.

The embodiments of the present application also provide a computer readable storage medium having stored thereon computer instructions for implementing the method performed by the network device or the terminal device in the above method embodiments.

For example, the computer program when executed by a computer, enables the computer to implement the method performed by the network device or the terminal device in the embodiments of the method described above.

The embodiment of the application also provides a computer program product, which contains instructions, and the instructions are executed by a computer to realize the method executed by the network device or the terminal device in the above method embodiments.

The explanation and beneficial effects of the related content in any of the above-mentioned devices can refer to the corresponding method embodiments provided above, and are not repeated here.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Furthermore, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.

In the above embodiments, it may be implemented in whole or in part 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, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. For example, the computer may be a personal computer, a server, or a network device, etc. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. For example, the aforementioned usable medium may include, but is not limited to, a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk or an optical disk, etc. various media that can store program codes.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within 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 channel measurement, the method comprising:

The terminal equipment receives a first reference signal from the network equipment at a first moment and receives a second reference signal from the network equipment at a second moment, wherein the first reference signal is used for measuring a first channel, and the second reference signal is used for measuring a second channel;

The terminal device receives a third reference signal from the network device at a third time and a fourth reference signal from the network device at a fourth time, the third reference signal corresponding to at least one first antenna port of the network device, the fourth reference signal corresponding to the at least one first antenna port of the network device;

The terminal equipment does not switch between uplink and downlink in a first period and a second period, wherein the first period is a period between the first moment and the third moment, and the second period is a period between the second moment and the fourth moment;

And the terminal equipment determines a first phase difference between the first channel and the second channel according to the third reference signal and the fourth reference signal.

2. The method of claim 1, wherein the third reference signal is used to measure a third channel and the fourth reference signal is used to measure a fourth channel, the method further comprising:

and the terminal equipment performs phase compensation on the first channel and the second channel according to the first phase difference, wherein the first phase difference is the phase difference between the third channel and the fourth channel.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

The terminal device receives first indication information of the network device, where the first indication information is used to indicate configuration information of the third reference signal and/or configuration information of the fourth reference signal.

4. A method according to any one of claims 1 to 3, characterized in that the first moment in time is the same moment in time as the third moment in time and/or the second moment in time is the same moment in time as the fourth moment in time.

5. The method according to any one of claims 1 to 4, further comprising:

the terminal equipment receives a fifth reference signal from the network equipment at a fifth moment, wherein the fifth reference signal is used for measuring a fifth channel;

The terminal equipment does not switch between uplink and downlink in a third period, wherein the third period is a period between the third moment and the fifth moment;

and the terminal equipment performs phase compensation on the fifth channel and the second channel according to the first phase difference.

6. The method according to any of claims 2 to 5, wherein the first indication information is further used to indicate that the third reference signal is associated with the first reference signal and/or the fifth reference signal.

7. The method according to any of claims 2 to 6, wherein the first indication information is further used to indicate that the fourth reference signal is associated with the second reference signal.

8. The method according to any of claims 1 to 7, wherein the bandwidth of the third reference signal is smaller than the bandwidth of the first reference signal and/or the bandwidth of the third reference signal is smaller than the bandwidth of the fifth reference signal.

9. A method of channel measurement, the method comprising:

the network equipment sends a first reference signal to the terminal equipment at a first moment and sends a second reference signal to the terminal equipment at a second moment;

The network device sends a third reference signal to the terminal device at a third moment and sends a fourth reference signal to the terminal device at a fourth moment, wherein the third reference signal corresponds to at least one first antenna port of the network device, the fourth reference signal corresponds to the at least one first antenna port of the network device, the terminal device does not switch between uplink and downlink between the first moment and the third moment, and the terminal device does not switch between uplink and downlink between the second moment and the fourth moment;

The network device receives a channel measurement report from the terminal device.

10. The method according to claim 9, wherein the method further comprises:

The network device sends first indication information to the terminal device, wherein the first indication information is used for indicating configuration information of the third reference signal and/or configuration information of the fourth reference signal.

11. The method according to claim 9 or 10, wherein the first time instant and the third time instant are the same time instant and/or the second time instant and the fourth time instant are the same time instant.

12. The method according to any one of claims 9 to 11, further comprising:

and the network equipment sends a fifth reference signal to the terminal equipment at a fifth moment, wherein the fifth reference signal is used for measuring a fifth channel, and the terminal equipment does not switch between uplink and downlink between the third moment and the fifth moment.

13. The method according to any of claims 9 to 12, wherein the first indication information is further used to indicate that the third reference signal is associated with the first reference signal and/or the fifth reference signal.

14. The method according to any of claims 9 to 13, wherein the first indication information is further used to indicate that the fourth reference signal is associated with the second reference signal.

15. The method according to any of claims 9 to 14, wherein the bandwidth of the third reference signal is smaller than the bandwidth of the first reference signal and/or the bandwidth of the third reference signal is smaller than the bandwidth of the fifth reference signal.

16. A communication device, comprising:

A processor for executing a computer program stored in a memory to cause the communication device to perform the method of any one of claims 1 to 15.

17. A computer-readable storage medium, having stored thereon a computer program or instructions, which, when executed by a processor, cause the method according to any of claims 1 to 15 to be performed.

18. A computer program product comprising instructions which, when run on a computer, cause the method of any one of claims 1 to 15 to be performed.

19. A chip system, comprising: processor for calling and running a computer program or instructions from a memory, causing a communication device in which the chip system is installed to implement the method according to any of claims 1 to 15.