Communication method and related apparatus

Abstract

Embodiments of the present application provide a communication method. In the method, upon receipt of first data carried on a physical downlink shared channel (PDSCH), a terminal device feeds back, to a network device, first feedback information obtained by measuring a reference signal related to the PDSCH, so that the network device can adjust, in a timely manner, on the basis of the first feedback information reported by the terminal device, a parameter to be used in subsequent scheduling of the PDSCH, so as to improve transmission efficiency. Compared with solutions in the prior art in which network devices can only obtain reports on the basis of periods of channel state information reference signals (CSI-RSs), the method provided in the present application can implement feedback in a PDSCH transmission process, so that the network device can adjust, in a timely manner, the parameter to be used in data scheduling.

Description

A communication method and related apparatus

[0001] This application claims priority from the Chinese patent application No. 202411093208.2 filed on August 8, 2024, and entitled "A communication method and related apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, in particular to a communication method and related apparatus. BACKGROUND

[0003] Wireless communication can be transmission communication between two or more communication nodes without propagation through a conductor or cable or propagation through an air interface. For example, the communication nodes include network devices and terminal devices. Generally, a terminal device can access a network device and receive scheduling and indication information of the network device to implement wireless communication.

[0004] Currently, a network device configures a channel state information reference signal (CSI-RS) resource for a terminal device, the terminal device performs measurement using the resource, and reports a channel quality indicator (CQI). Thus, the network device adjusts a modulation and coding scheme (MCS) of a physical downlink shared channel (PDSCH) according to the CQI reported by the terminal device, thereby realizing scheduling of downlink data.

[0005] However, the period of the CSI-RS is generally long, the interference of the terminal device at different times is different, and the channel of the terminal device also changes with time, which can cause the CQI obtained based on the CSI-RS measurement to be inaccurate for PDSCH scheduling in the future. SUMMARY

[0006] Embodiments of the present application provide a communication method and related apparatus. After a terminal device receives first data carried by a PDSCH, the terminal device feeds back first feedback information obtained by measuring a reference signal related to the PDSCH to a network device, so that the network device can adjust parameters used for subsequent scheduling in a timely manner to improve transmission efficiency. Compared with the scheme in the prior art in which the network device can only report through the period of the CSI-RS, the method provided in the present application can also feed back during PDSCH transmission, which can enable the network device to adjust parameters used for scheduling data more timely.

[0007] The first aspect of the present application provides a communication method, which is executed by a terminal device, or executed by part components (such as processors, chips or chip systems, etc.) in the terminal device, or can also be implemented by a logic module or software which can realize all or part of the functions of the terminal device. In the first aspect and its possible implementation manners, the method is described by taking the example of being executed by the terminal device. The terminal device receives first data carried on a PDSCH, and the PDSCH is associated with a reference signal, and then sends first feedback information of the reference signal to a network device. The first feedback information includes at least one of the following: a first parameter, and a difference between the first parameter and a second parameter; the first parameter is a parameter obtained by measuring the reference signal, and the second parameter is a parameter used by the PDSCH.

[0008] Based on the above technical solution, after receiving the first data carried on the PDSCH, the terminal device feeds back the first feedback information obtained by measuring the reference signal associated with the PDSCH to the network device, so that the network device can timely adjust the parameter used for subsequent scheduling according to the first feedback information reported by the terminal device to improve the transmission efficiency. Compared with the scheme in the prior art in which the network device can only report through the period of CSI-RS, the method provided in the present application can also feed back in the PDSCH transmission process, which can make the network device more timely adjust the parameter used for scheduling data.

[0009] Optionally, in a possible implementation manner of the first aspect, the first parameter and / or the second parameter includes at least one of the following: reference signal receiving power (RSRP), reference signal receiving quality (RSRP), signal to interference plus noise ratio (SINR), modulation and coding scheme (MCS), channel quality indicator (CQI), etc.

[0010] In this possible implementation manner, various types of parameters are introduced, so that the first feedback information can be flexibly measured.

[0011] Optionally, in a possible implementation manner of the first aspect, the first feedback information is used by the network device to adjust the parameter used for the terminal device to transmit the first data on the PDSCH.

[0012] In this possible implementation, the first feedback information can be used by the network device to adjust the parameters used for transmitting the first data of the PDSCH, so as to improve the transmission efficiency of the subsequent PDSCH.

[0013] Optionally, in a possible implementation of the first aspect, the first feedback information is further used to indicate whether the first data is correctly received. Alternatively, it is understood that the parameter or the parameter difference can be located in an acknowledgment (ACK) or a negative acknowledgment (NACK).

[0014] In this possible implementation, the first feedback information can not only indicate the parameter or the parameter difference, but also indicate whether the first data is correctly received, so that the existing ACK / NACK can be multiplexed.

[0015] Optionally, in a possible implementation of the first aspect, the method further includes: the terminal device sending second feedback information of the first data, the second feedback information being used to indicate whether the first data is correctly received. Alternatively, it is understood that the parameter or the parameter difference can be other feedback information different from the ACK / NACK.

[0016] In this possible implementation, the parameter or the parameter difference is reported through the first feedback information, and the ACK / NACK is reported through the second feedback information, so that the network device can determine the parameters used for transmitting the data of the subsequent PDSCH according to the first feedback information and the second feedback information, and timely optimize the transmission efficiency.

[0017] Optionally, in a possible implementation of the first aspect, the method further includes: the terminal device receiving second data, the parameters used for a PDSCH channel where the second data is located being the same as or different from the parameters used for a PDSCH channel where the first data is located.

[0018] In this possible implementation, after the terminal device reports the first feedback information, the terminal device can further receive the second data. The second data carried by the PDSCH can be data optimized by the network device according to the first feedback information on the parameters of the PDSCH.

[0019] Optionally, in a possible implementation of the first aspect, in a case where the terminal device does not correctly receive the first data, the parameters used for the PDSCH channel where the second data is located are smaller than the parameters used for the PDSCH channel where the first data is located.

[0020] In this possible implementation, the parameters used by the PDSCH to schedule the first data can cause the terminal device to fail to correctly receive the first data, and therefore, the parameters can be appropriately reduced when the second data is scheduled by the PDSCH subsequently, so as to reduce the probability that the terminal device fails to correctly receive the second data.

[0021] Optionally, in a possible implementation of the first aspect, in the case where the terminal device correctly receives the first data, the parameters used by the PDSCH channel in which the second data is located are greater than the parameters used by the PDSCH channel in which the first data is located.

[0022] In this possible implementation, the parameters used by the PDSCH to schedule the first data do not affect the terminal device to receive the first data, and therefore, the parameters can be appropriately increased when the second data is scheduled by the PDSCH subsequently, so as to improve the transmission efficiency.

[0023] Optionally, in a possible implementation of the first aspect, the reference signal includes at least one of the following: a demodulation reference signal (DMRS), a phase-tracking reference signal (PT-RS), and the like.

[0024] In this possible implementation, the first feedback information can be reported by measuring the DMRS, so that the network device can be triggered to update the parameters used to schedule the PDSCH subsequently in a timely manner.

[0025] The second aspect of the present application provides a communication method, which is executed by a network device, or executed by part of components (for example, a processor, a chip, or a chip system, etc.) in the network device, or the method can also be implemented by a logic module or software that can realize all or part of the functions of the network device. In the second aspect and possible implementation manners thereof, the method is described by taking the example of being executed by the network device. The network device transmits first data on a PDSCH, and the PDSCH is associated with a reference signal. Then, a first feedback information of a first parameter is received. The first feedback information includes at least one of the following: the first parameter, and a difference between the first parameter and a second parameter. The first parameter is a parameter obtained by measuring the reference signal, and the second parameter is a parameter used by the PDSCH.

[0026] Based on the above scheme, after the network device transmits the first data carried by the PDSCH to the terminal device, the network device can receive the first feedback information of the reference signal related to the PDSCH reported by the terminal device, so that the network device can adjust the parameters used for subsequent scheduling in time according to the first feedback information reported by the terminal device to improve the transmission efficiency. Compared with the scheme in the prior art in which the network device can only report through the period of the CSI-RS, the method provided in the present application can also feed back during the PDSCH transmission process, so that the network device can adjust the parameters used for scheduling data more timely.

[0027] Optionally, in a possible implementation manner of the second aspect, the first parameter and / or the second parameter include at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRP), signal to interference plus noise ratio (SINR), modulation and coding strategy (MCS), and channel quality indication (CQI).

[0028] In this possible implementation manner, multiple types of parameters are introduced, so that the first feedback information can be flexibly measured.

[0029] Optionally, in a possible implementation manner of the second aspect, the first feedback information is used by the network device to adjust the parameters used for transmitting the first data of the PDSCH.

[0030] In this possible implementation manner, the first feedback information can be used by the network device to adjust the parameters used for transmitting the first data of the PDSCH, so as to improve the transmission efficiency of the subsequent scheduling of the PDSCH.

[0031] Optionally, in a possible implementation manner of the second aspect, the first feedback information is also used to indicate whether the first data is correctly received. Alternatively, it can be understood that the parameter or the parameter difference can be located in ACK or NACK.

[0032] In this possible implementation manner, the first feedback information can not only indicate the parameter or the parameter difference, but also indicate whether the first data is correctly received, so that the existing ACK / NACK can be multiplexed.

[0033] Optionally, in a possible implementation manner of the second aspect, the method further includes: receiving, by the network device, second feedback information of the first data, the second feedback information being used to indicate whether the first data is correctly received. Alternatively, it can be understood that the parameter or the parameter difference can be other feedback information different from ACK / NACK.

[0034] In the possible implementation, the first feedback information reports the parameters or the parameter difference, and the second feedback information reports the ACK / NACK, so that the network device can determine the parameters of the subsequent PDSCH transmission data according to the first feedback information and the second feedback information, and optimize the transmission efficiency in time.

[0035] Optionally, in a possible implementation of the second aspect, the method further includes: the network device sending second data, the PDSCH channel where the second data is located using the same or different parameters from the PDSCH channel where the first data is located.

[0036] In the possible implementation, after the terminal device reports the first feedback information, the network device can further send second data to the terminal device. The second data carried by the PDSCH can be data optimized by the network device according to the first feedback information on the parameters of the PDSCH.

[0037] Optionally, in a possible implementation of the second aspect, in the case where the terminal device does not correctly receive the first data, the PDSCH channel where the second data is located uses smaller parameters than the PDSCH channel where the first data is located.

[0038] In the possible implementation, the parameters used by the PDSCH to schedule the first data can cause the terminal device to fail to correctly receive the first data, and therefore, the parameters can be appropriately reduced when the second data is subsequently scheduled by the PDSCH, so as to reduce the probability that the terminal device fails to correctly receive the second data.

[0039] Optionally, in a possible implementation of the second aspect, in the case where the terminal device correctly receives the first data, the PDSCH channel where the second data is located uses larger parameters than the PDSCH channel where the first data is located.

[0040] In the possible implementation, the parameters used by the PDSCH to schedule the first data do not affect the terminal device to receive the first data, and therefore, the parameters can be appropriately increased when the second data is subsequently scheduled by the PDSCH, so as to improve the transmission efficiency.

[0041] Optionally, in a possible implementation of the second aspect, the reference signal includes at least one of the following: a demodulation reference signal (DMRS) and a phase tracking reference signal (PT-RS).

[0042] In the possible implementation, the first feedback information can be reported by measuring the DMRS, so that the network device can be triggered to update the parameters of the subsequently scheduled PDSCH in time.

[0043] The third aspect of the present application provides a communication apparatus, which is a terminal device, or a part of the terminal device (for example, a processor, a chip or a chip system, etc.), or a logic module or software capable of realizing all or part of the functions of the terminal device. The communication apparatus comprises a transceiver.

[0044] The transceiver is configured to receive first data, the first data being carried on a physical downlink shared channel (PDSCH), and the PDSCH being associated with a reference signal.

[0045] The transceiver is further configured to send first feedback information of the reference signal, the first feedback information comprising at least one of the following: a first parameter and a difference between the first parameter and a second parameter, the first parameter being a parameter obtained by measuring the reference signal, and the second parameter being a parameter used by the PDSCH.

[0046] Optionally, in a possible implementation manner of the third aspect, the first parameter and / or the second parameter comprises at least one of the following: a reference signal received power (RSRP), a reference signal received quality (RSRP), a signal to interference plus noise ratio (SINR), a modulation and coding strategy (MCS), and a channel quality indicator (CQI).

[0047] Optionally, in a possible implementation manner of the third aspect, the first feedback information is used by the network device to adjust the parameter used by the PDSCH to transmit the first data.

[0048] Optionally, in a possible implementation manner of the third aspect, the first feedback information is further used to indicate whether the first data is correctly received.

[0049] Optionally, in a possible implementation manner of the third aspect, the transceiver is further configured to send second feedback information of the first data, the second feedback information being used to indicate whether the first data is correctly received.

[0050] Optionally, in a possible implementation manner of the third aspect, the transceiver is further configured to receive second data, a PDSCH channel on which the second data is located using the same or different parameter as a PDSCH channel on which the first data is located.

[0051] Optionally, in a possible implementation manner of the third aspect, in a case where the terminal device does not correctly receive the first data, the PDSCH channel on which the second data is located uses a smaller parameter than the PDSCH channel on which the first data is located.

[0052] Optionally, in a possible implementation manner of the third aspect, in a case where the terminal device correctly receives the first data, the PDSCH channel on which the second data is located uses a larger parameter than the PDSCH channel on which the first data is located.

[0053] Optionally, in a possible implementation manner of the third aspect, the reference signal includes at least one of the following: a demodulation reference signal (DMRS) and a phase tracking reference signal (PT-RS).

[0054] The fourth aspect of the present application provides a communication apparatus, which is a network device, or a part of the network device (for example, a processor, a chip or a chip system, etc.), or a logic module or software capable of realizing all or part of the network device functions. The communication apparatus includes a transceiver unit.

[0055] The transceiver unit is configured to send first data, the first data being carried on a physical downlink shared channel (PDSCH), and the PDSCH being associated with a reference signal;

[0056] The transceiver unit is further configured to receive first feedback information of the reference signal, the first feedback information including at least one of the following: a first parameter and a difference between the first parameter and a second parameter, the first parameter being a parameter obtained by measuring the reference signal, and the second parameter being a parameter used by the PDSCH.

[0057] Optionally, in a possible implementation manner of the fourth aspect, the first parameter and / or the second parameter include at least one of the following: a reference signal received power (RSRP), a reference signal received quality (RSRP), a signal to interference plus noise ratio (SINR), a modulation and coding strategy (MCS), and a channel quality indicator (CQI).

[0058] Optionally, in a possible implementation manner of the fourth aspect, the first feedback information is used by the network device to adjust a parameter used by the PDSCH to transmit the first data.

[0059] Optionally, in a possible implementation manner of the fourth aspect, the first feedback information is further used to indicate whether the first data is correctly received.

[0060] Optionally, in a possible implementation manner of the fourth aspect, the transceiver unit is further configured to receive second feedback information of the first data, the second feedback information being used to indicate whether the first data is correctly received.

[0061] Optionally, in a possible implementation manner of the fourth aspect, the transceiver unit is further configured to send second data, a parameter used by a PDSCH channel on which the second data is located being the same as or different from a parameter used by a PDSCH channel on which the first data is located.

[0062] Optionally, in a possible implementation manner of the fourth aspect, in a case where the terminal device does not correctly receive the first data, the parameter used by the PDSCH channel on which the second data is located is smaller than the parameter used by the PDSCH channel on which the first data is located.

[0063] Optionally, in a possible implementation manner of the fourth aspect, the parameter used by the PDSCH channel where the second data is located is greater than the parameter used by the PDSCH channel where the first data is located, in a case where the terminal device correctly receives the first data.

[0064] Optionally, in a possible implementation manner of the fourth aspect, the reference signal includes at least one of the following: a demodulation reference signal (DMRS) and a phase tracking reference signal (PT-RS).

[0065] The fifth aspect of the present application provides a communication apparatus, including at least one processor, the at least one processor being coupled with a memory; the memory being configured to store programs or instructions; and the at least one processor being configured to execute the programs or instructions to enable the apparatus to implement the method in any possible implementation manner of the first aspect.

[0066] The sixth aspect of the present application provides a communication apparatus, including at least one processor, the at least one processor being coupled with a memory; the memory being configured to store programs or instructions; and the at least one processor being configured to execute the programs or instructions to enable the apparatus to implement the method in any possible implementation manner of the second aspect.

[0067] The seventh aspect of the present application provides a communication apparatus, including at least one logic circuit and an input / output interface; the logic circuit being configured to execute the method in any possible implementation manner of the first aspect.

[0068] The eighth aspect of the present application provides a communication apparatus, including at least one logic circuit and an input / output interface; the logic circuit being configured to execute the method in any possible implementation manner of the second aspect.

[0069] The ninth aspect of the present application provides a communication system, including the terminal device in any possible implementation manner of the fifth aspect and the network device in any possible implementation manner of the sixth aspect, or including the terminal device in any possible implementation manner of the seventh aspect and the network device in any possible implementation manner of the eighth aspect.

[0070] The tenth aspect of the present application provides a computer readable storage medium, the storage medium being configured to store one or more computer execution instructions, when the computer execution instructions are executed by a processor, the processor executes the method in any possible implementation manner of any aspect of the first aspect or the second aspect.

[0071] The eleventh aspect of the present application provides a computer program product (or computer program), when a computer program in the computer program product is executed by the processor, the processor executes the method of any possible implementation manner of any one of the first aspect or the second aspect.

[0072] The twelfth aspect of the present application provides a chip system, comprising at least one processor, used for supporting a communication device to implement the method of any possible implementation manner of any one of the first aspect or the second aspect.

[0073] In a possible design, the chip system can further comprise a memory, used for storing necessary program instructions and data of the communication device. The chip system can be composed of a chip, or can comprise the chip and other discrete devices. Optionally, the chip system further comprises an interface circuit, which provides program instructions and / or data for the at least one processor.

[0074] The technical effects brought by any design manner of the third aspect to the twelfth aspect can refer to the technical effects brought by different design manners of the first aspect and the second aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0075] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only belong to the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0076] FIG. 1A is a schematic diagram of a communication system related to the present application;

[0077] FIG. 1B is another schematic diagram of a communication system related to the present application;

[0078] FIG. 1C is another schematic diagram of a communication system related to the present application;

[0079] FIG. 2 is another schematic diagram of a communication system related to the present application;

[0080] FIG. 3 is another schematic diagram of a communication system related to the present application;

[0081] FIG. 4 is a schematic diagram of an access network device related to the present application;

[0082] FIG. 5 is a flow schematic diagram of a communication method related to the present application;

[0083] FIG. 6 is another flow schematic diagram of a communication method related to the present application;

[0084] FIGS. 7-10 are several schematic diagrams of the communication apparatus provided in the present application. DETAILED DESCRIPTION

[0085] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0086] First, some terms in the embodiments of the present application are explained to facilitate the understanding of those skilled in the art.

[0087] 1. Terminal device

[0088] The terminal device can be a wireless terminal device capable of receiving network device scheduling and indication information, and the wireless terminal device can be a device providing voice and / or data connectivity to a user, or a handheld device with wireless connection function, or other processing devices connected to a wireless modem.

[0089] A terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN), and the terminal device can be a mobile terminal device, such as a mobile phone (or called "cellular" phone, mobile phone), a computer, and a data card, for example, which can be a portable, pocket, handheld, computer built-in, or vehicle mounted mobile device that exchanges voice and / or data with a radio access network. For example, a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a Pad, a computer with wireless transceiver function, and the like. The wireless terminal device can also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station (MS), a remote station, an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, a subscriber station (SS), a customer premises equipment (CPE), a terminal, a user equipment (UE), a mobile terminal (MT), and the like. The terminal device can also be a wearable device and a terminal device in a next generation communication system, such as a 5G communication network and a future communication network, or a terminal device in a future evolved public land mobile network (PLMN), and the like.

[0090] 2. Network device

[0091] The network device can be a device in a wireless network, for example, the network device can be a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network, which can also be referred to as a base station. Currently, some examples of RAN devices are: a new generation Node B (gNodeB) in a 5G communication system, a transmission reception point (TRP), an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (for example, a home evolved Node B, or a home Node B, HNB), a baseband unit (BBU), or a wireless fidelity (Wi-Fi) access point (AP), etc. In addition, in one network structure, the network device can include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node.

[0092] In the above, the network device can send configuration information (for example, carried in a scheduling message and / or an indication message) to the terminal device, and the terminal device further performs network configuration according to the configuration information, so that the network configuration between the network device and the terminal device is aligned; or, the network configuration preset in the network device and the network configuration preset in the terminal device are used to align the network configuration between the network device and the terminal device. Specifically, "alignment" means that when there is an interaction message between the network device and the terminal device, the two devices are consistent in understanding the carrier frequency of the interaction message transmission and reception, the type of the interaction message, the meaning of the field information carried in the interaction message, or other configurations of the interaction message.

[0093] In addition, in other possible cases, the network device can be other devices that provide wireless communication functions for the terminal device. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. For the convenience of description, the embodiments of the present application do not limit.

[0094] The network device can also include a core network device, for example, including an access and mobility management function (AMF), a user plane function (UPF), or a session management function (SMF), etc.

[0095] In the embodiments of the present application, the device for implementing the function of the network device can be the network device, or a device capable of supporting the network device to implement the function, such as a chip system, which can be installed in the network device. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the network device is taken as an example to describe the technical solutions provided in the embodiments of the present application.

[0096] 3. Configuration and pre-configuration

[0097] In the present application, both configuration and pre-configuration will be used. Among them, the configuration refers to that the network device / server sends some parameter configuration information or parameter values to the terminal device through a message or signaling, so that the terminal device determines the communication parameters or the resource in the transmission according to the values or information. The pre-configuration is similar to the configuration, which can be the parameter information or parameter values agreed by the network device / server and the terminal device in advance, or the parameter information or parameter values adopted by the base station / network device or the terminal device according to the standard protocol, or the parameter information or parameter values pre-stored in the base station / server or the terminal device. The present application does not limit this.

[0098] Further, these values and parameters can be changed or updated.

[0099] 4. Channel state information (CSI)

[0100] The CSI is used to evaluate or describe the characteristics of the communication channel, which can include, for example: channel gain, phase information, multipath fading information, interference information, etc.

[0101] The CSI reporting mode can include periodic CSI reporting (P-CSI), semi-persistent CSI reporting (SP-CSI), and aperiodic CSI reporting (AP-CSI).

[0102] (1) Periodic CSI reporting process includes: the network device configures the terminal device to perform periodic CSI reporting through high layer signaling (such as RRC signaling), the terminal device performs channel measurement and interference measurement based on periodic channel state information reference signal (CSI-RS) resources, and reports CSI on the physical uplink control channel (PUCCH) at fixed time intervals. In periodic CSI reporting, the channel measurement resource (CMR) and the interference measurement resource (IMR) used for measurement are periodic, and specific parameters such as period and resource mapping can be configured by the network device to the terminal device through RRC signaling. In addition, the period of CSI reporting and the PUCCH resource used for reporting are also configured by the network device to the terminal device through RRC signaling.

[0103] (2) The process of semi-persistent CSI reporting includes: when the terminal device is configured to use semi-persistent CSI reporting, the terminal device starts CSI reporting only when it receives a downlink signaling sent by the network to indicate that it starts to perform CSI reporting, and ends CSI reporting only when it receives a downlink signaling to indicate that it stops CSI reporting. Between the two downlink signaling issuing time points, the terminal device performs periodic CSI measurement and reporting. The CMR and IMR used for semi-persistent CSI reporting can be periodic or semi-persistent. When the terminal device uses semi-persistent CSI reporting, it can report on PUCCH resources, and the network device can activate and deactivate semi-persistent CSI reporting through downlink high layer signaling (such as MAC CE signaling); when the terminal device uses semi-persistent CSI reporting, it can also report on physical uplink shared channel (PUSCH) resources, and the network device can activate and deactivate semi-persistent CSI reporting through physical layer downlink control signaling (DCI). Whether the SP CSI measurement using PUCCH or the SP CSI measurement using PUSCH, the measurement parameters such as measurement quantity and measurement bandwidth can be configured by the network device to the terminal device through RRC signaling.

[0104] (3) The process of non-periodic CSI reporting and measurement includes:

[0105] The network device first semi-statically configures the terminal device with multiple CSI reporting configuration parameters through downlink RRC signaling. For example, the network device triggers one or more CSI reporting configuration parameters to the terminal device through DCI, the terminal device performs CSI measurement according to the CSI reporting configuration parameters, and reports the CSI measurement result using PUSCH resources. It should be noted that although the aperiodic CSI reporting and the semi-persistent CSI reporting both need to be triggered by the network device, the aperiodic CSI reporting does not need to be deactivated after being activated through DCI, and only one measurement and reporting are performed. The CMR and IMR used by the aperiodic CSI reporting can be periodic or semi-persistent or aperiodic.

[0106] It should be noted that in the above three CSI reporting schemes, the configuration parameters required in the CSI reporting process can be configured by the network device to the terminal device through RRC signaling, for example, the configuration parameters can include one or more of reporting quantity, reporting bandwidth, etc. The reporting quantity can include one or more of rank indicator (RI), channel quality indicator (CQI), or precoding matrix indicator (PMI), reference signal receiving power (RSRP), CSI-RS resource indication (CRI), etc. In the NR system, the network device can complete different measurement requirements through the configuration parameters of the CSI measurement.

[0107] The network device can configure the resource configuration parameters of the CSI to the terminal device through high-layer signaling, such as RRC signaling, to indicate the resources used for measurement and reporting to the terminal device. For example, the resources used for measurement and reporting can be configured to the terminal device through the field csi-resourceConfig in the RRC signaling. The resource configuration parameters of the CSI can include 1-3 CSI-RS resource configurations (CSI-RS resource settings).

[0108] In an example, when the resource configuration parameters of the CSI include 1 CSI-RS resource setting, the CSI-RS resource setting is used to implement beam measurement, that is, to calculate the Layer 1 Reference Signal Received Power (L1-RSRP).

[0109] In another example, when the resource configuration parameter of the CSI includes 2 CSI-RS resource settings, one CSI-RS resource setting contains a set of non-zero power channel state information-reference signal resource sets (NZP CSI-RS resource sets). The NZP CSI-RS resource set can be configured by the network device to the terminal device through a high-level parameter NZP-CSI-RS-ResourceSet. The network device can indicate to the terminal device an NZP CSI-RS resource set in the set of NZP CSI-RS resource sets for channel measurement, so that the terminal device performs channel measurement based on the NZP CSI-RS resource set indicated by the network device. The other CSI-RS resource setting contains one NZP CSI-RS resource set or one CSI interference measurement (CSI-IM) resource set, and further, the terminal device performs interference measurement on the NZP CSI-RS resource set or the CSI-IM resource set. The CSI-IM resource set can be configured by the network device to the terminal device through a high-level parameter CSI-IM-ResourceSet.

[0110] It should be noted that: in the above-mentioned one NZP CSI-RS resource set for channel measurement indicated by the network device in the CSI-RS resource setting, n NZP CSI-RS resources can be contained, when the interference measurement is based on NZP CSI-RS, n = 1; and when the interference measurement is based on CSI-IM, n ≥ 1 and n is an integer. When n ≥ 1, the CSI-IM resource set also contains the same number of CSI-IM resources, and corresponds to the n NZP CSI-RS resources in the NZP CSI-RS resource set one by one. The terminal device selects one NZP CSI-RS resource, such as the Xth NZP CSI-RS resource, from the n NZP CSI-RS resources, and measures and reports the CSI measurement result on this NZP CSI-RS resource and the corresponding CSI-IM resource. The content of the CSI measurement result includes the reporting quantity indicated by the network device through the high layer signaling (reportQuantity, contained in the CSI reporting configuration parameter CSI-ReportConfig). When the terminal device reports the CSI measurement result, the indication (CSI-RS resource indicator, CRI) of the NZP CSI-RS resource corresponding to the CSI measurement result will be reported, that is, used to indicate X.

[0111] In yet another example, when the resource configuration parameter of the CSI includes 3 CSI-RS resource settings, the first CSI-RS resource setting includes a set of NZP CSI-RS resource sets. The network device can indicate to the terminal device a NZP CSI-RS resource set in the set of NZP CSI-RS resource sets for channel measurement, so that the terminal device performs channel measurement based on the NZP CSI-RS resource set indicated by the network device. The second CSI-RS resource setting includes a set of NZP CSI-RS resource sets; the third CSI-RS resource setting includes a CSI-IM resource set. The terminal device performs interference measurement based on the second and third resources, the difference being that the terminal device performs inter-user interference measurement based on the NZP CSI-RS resource set included in the second CSI-RS resource setting, and performs inter-cell interference measurement based on the CSI-IM resource set included in the third CSI-RS resource setting.

[0112] 5. CSI-RS configuration

[0113] In the NR system, channel measurement is performed on NZP CSI-RS resource setting. The time-domain transmission behavior of NZP CSI-RS can be periodic (Periodic CSI-RS, P-CSI-RS), semi-persistent (Semi-persistent CSI-RS, SP-CSI-RS), or aperiodic (Aperiodic CSI-RS, AP-CSI-RS). For each CSI reporting, one CSI-RS resource setting can be configured for channel measurement, and the CSI-RS resource setting is configured with a type (P / SP / AP-CSI-RS) indicating the time-domain transmission behavior. Each CSI-RS resource setting can contain m CSI-RS resource sets, m = 1 when the type of the CSI-RS resource setting is P / SP-CSI-RS, and m ≥ 1 when the type of the CSI-RS resource setting is AP-CSI-RS. When m ≥ 1, for a specific CSI measurement reporting, the network device selects one CSI-RS resource set from the m ≥ 1 CSI-RS resource sets to associate with the specific CSI measurement and reporting.

[0114] 6、The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following cases: A exists alone, B exists alone, A and B exist together, wherein A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, "at least one of A, B, and (or) C" can represent the following cases: A exists alone, B exists alone, C exists alone, A and B exist together, A and C exist together, B and C exist together, A, B, and C exist together. In addition, unless otherwise specified, the ordinal numbers "first", "second", etc. mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, time sequence, priority or importance of the multiple objects.

[0115] 7、In the embodiments of the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, and also can include indirect receiving from YY through the air interface by other units or modules. "Sending" can also be understood as "output" of the chip interface, and "receiving" can also be understood as "input" of the chip interface. For another example, "sending" can also be understood as that the baseband part of the device outputs information to the radio frequency part, and "receiving" can also be understood as that the radio frequency part of the device receives the output information of the baseband part.

[0116] In other words, sending and receiving can be performed between devices, for example, between network devices and terminal devices, or can be performed within a device, for example, between components, modules, chips, software modules or hardware modules in the device through a bus, wire or interface.

[0117] It can be understood that the information can be processed as necessary between the source and the destination of the information transmission, such as encoding, modulation, etc., but the destination can understand the valid information from the source. Similar expressions in the present application can be similarly understood, and will not be repeated here.

[0118] In the embodiments of the present application, transmission includes sending and / or receiving. That is, transmission can be sending, can be receiving, or can include sending and receiving, which is not limited here.

[0119] In addition, receiving can also be understood as detecting, listening, etc., which is not limited here. For example, for receiving DCI, it usually means listening to DCI.

[0120] 8、In the present application, "for indicating" can include for directly indicating and for indirectly indicating. When describing that certain indication information is for indicating A, it can be understood as that the indication information carries A, directly indicates A or indirectly indicates A.

[0121] In the present application, the information indicated by the indication information is referred to as to-be-indicated information. In the implementation process, there are many ways to indicate the to-be-indicated information, for example, the to-be-indicated information can be indicated directly, such as by the to-be-indicated information itself or the index of the to-be-indicated information. The to-be-indicated information can also be indicated indirectly by indicating other information, where the to-be-indicated information and the other information have an association relationship. The to-be-indicated information can also be indicated only by a part of the to-be-indicated information, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, the protocol stipulates), thereby reducing the indication overhead to a certain extent.

[0122] The to-be-indicated information can be sent as a whole, or can be sent separately into multiple sub-information, and the sending period and / or sending occasion of the sub-information can be the same or different. The specific sending method is not limited in the present application. The sending period and / or sending occasion of the sub-information can be predefined, for example, predefined according to the protocol, or configured by the transmitting end device by sending configuration information to the receiving end device. The configuration information may, for example, but not limited to, include one or a combination of at least two of RRC signaling, medium access control (MAC) layer signaling and physical layer signaling. The MAC layer signaling may, for example, include MAC CE; the physical layer signaling may, for example, include downlink control information (DCI).

[0123] In the present application, the same or similar parts of each embodiment can be mutually referenced unless otherwise specified. In the present application, the terms and / or descriptions of different embodiments and different embodiments in each embodiment are consistent and can be mutually referenced unless otherwise specified and logically conflicted. The technical features of different embodiments and different embodiments in each embodiment can be combined to form new embodiments, embodiments, methods or implementation methods according to their inherent logical relationship. The following embodiments of the present application do not constitute a limitation on the protection scope of the present application.

[0124] In order to facilitate the understanding of the method provided by the embodiments of the present application, the system architecture of the method provided by the embodiments of the present application will be described below. It can be understood that the system architecture described in the embodiments of the present application is used to more clearly illustrate the scheme of the embodiments of the present application, and does not constitute a limitation on the scheme provided by the embodiments of the present application.

[0125] Referring to FIG. 1A, an architecture diagram of a communication system 1000 to which embodiments of the present application are applied is shown. As shown in FIG. 1A, the communication system includes a radio access network (RAN) 100 and a core network 200. Optionally, the communication system 1000 can further include the Internet 300. The RAN 100 includes at least one RAN node (e.g., 110a and 110b in FIG. 1A, collectively referred to as 110) and at least one terminal device (e.g., 120a-120j in FIG. 1A, collectively referred to as 120). The RAN 100 can further include other RAN nodes, such as a wireless relay device and / or a wireless backhaul device (not shown in FIG. 1A). The terminal devices 120 are connected to the RAN nodes 110 in a wireless manner, and the RAN nodes 110 are connected to the core network 200 in a wireless or wired manner. The core network devices in the core network 200 and the RAN nodes 110 in the RAN 100 can be independent and different physical devices, or can be the same physical device integrated with the logical functions of the core network devices and the logical functions of the RAN nodes. The terminal devices and the terminal devices, and the RAN nodes and the RAN nodes can be connected to each other in a wired or wireless manner.

[0126] The RAN 100 can be an evolved universal terrestrial radio access (E-UTRA) system, an NR system, or a future wireless access system defined by 3GPP. The RAN 100 can also include two or more different wireless access systems described above. The RAN 100 can also be an open RAN (O-RAN).

[0127] The RAN node, also referred to as a radio access network device, a RAN entity, or an access node, is used to help the terminal device access the communication system in a wireless manner. In an application scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5th generation (5G) mobile communication system, a next generation NodeB in a 6th generation (6G) mobile communication system, or a base station in a future mobile communication system. The RAN node can be a macro base station (e.g., 110a in FIG. 1A), a micro base station or an indoor station (e.g., 110b in FIG. 1A), a relay node, or a donor node.

[0128] In another application scenario, a terminal device can access a network through cooperation of a plurality of RAN nodes, and different RAN nodes implement part of functions of a base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). The CU here implements functions of a radio resource control protocol and a packet data convergence protocol (PDCP) of the base station, and can also implement a function of a service data adaptation protocol (SDAP); the DU implements functions of a radio link control layer and a medium access control (MAC) layer of the base station, and can also implement part of a physical layer or all of a physical layer; and specific descriptions about the protocol layers can be referred to related technical specifications of the 3GPP. The RU can be used to implement functions of transceiving a radio frequency signal. The CU and the DU can be two independent RAN nodes, or can be integrated in a same RAN node, for example, integrated in a baseband unit (BBU). The RU can be included in a radio frequency device, for example, included in a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes, a CU-control plane and a CU-user plane.

[0129] In different systems, a RAN node can have different names. For example, in an O-RAN system, a CU can be referred to as an open CU (O-CU), a DU can be referred to as an open DU (O-DU), and an RU can be referred to as an open RU (O-RU). The RAN node in the embodiments of the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. For example, the RAN node can be a server loaded with a corresponding software module. The embodiments of the present application do not limit specific technologies and specific device forms adopted by the RAN node.

[0130] In addition, the RAN node can also be referred to as a network device, which is a device deployed in a wireless access network to provide wireless communication functions for terminal devices. The network device can include various forms of macro base stations, micro base stations (also known as small stations), relay stations, access points, etc. In systems using different wireless access technologies, the names of network devices can be different, such as eNB or eNodeB (Evolutional NodeB) in Long Term Evolution (LTE). The network device can also be a wireless controller in a cloud radio access network (CRAN) scenario. The network device can also be a base station device in a future 5G network or a network device in a future evolved PLMN network. The network device can also be a wearable device or a vehicle-mounted device. The network device can also be a transmission and reception point (TRP). In addition, in a network structure, the network device can include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node. For ease of description, a base station is described as an example of a RAN node below.

[0131] A terminal device is a device with wireless transceiver function, which can transmit signals to a base station or receive signals from a base station. The terminal device can also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal device, etc. The terminal device can be widely applied in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal device can be a mobile phone, tablet computer, computer with wireless transceiver function, wearable device, vehicle, airplane, ship, robot, mechanical arm, smart home device, etc. Embodiments of the present application do not limit the specific technology and specific device form of the terminal device.

[0132] The base stations and the terminal devices can be fixed in position or mobile. The base stations and the terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water; can also be deployed on airplanes, balloons, and artificial satellites. Embodiments of the present application do not limit the application scenarios of the base stations and the terminal devices.

[0133] The roles of the base stations and the terminal devices can be relative, for example, the helicopter or the unmanned aerial vehicle 120i in FIG. 1A can be configured as a mobile base station, and for those terminal devices 120j that access the wireless access network 100 through 120i, the terminal device 120i is a base station; but for the base station 110a, 120i is a terminal device, that is, 110a communicates with 120i through a wireless air interface protocol. Of course, 110a and 120i can also communicate through a base station-to-base station interface protocol, and in this case, 120i is also a base station relative to 110a. Therefore, the base stations and the terminal devices can be collectively referred to as communication devices, 110a and 110b in FIG. 1A can be referred to as communication devices with base station functions, and 120a-120j in FIG. 1A can be referred to as communication devices with terminal device functions.

[0134] The base stations and the terminal devices, the base stations and the base stations, and the terminal devices and the terminal devices can communicate through licensed frequency spectrum, can communicate through unlicensed frequency spectrum, or can simultaneously communicate through licensed frequency spectrum and unlicensed frequency spectrum; can communicate through frequency spectrum below 6 gigahertz (GHz), can communicate through frequency spectrum above 6 GHz, or can simultaneously use frequency spectrum below 6 GHz and frequency spectrum above 6 GHz. Embodiments of the present application do not limit the frequency spectrum resources used for wireless communication.

[0135] In embodiments of the present application, the functions of the base station can also be performed by a module (such as a chip) in the base station, or by a control subsystem containing base station functions. The control subsystem containing base station functions herein can be a control center in the above-mentioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. The functions of the terminal device can also be performed by a module (such as a chip or a modem) in the terminal device, or by a device containing terminal device functions.

[0136] It can be understood that the RAN 100 has been described above to include at least one RAN node (such as 110a and 110b in FIG. 1A, collectively referred to as 110) and at least one terminal device (such as 120a-120j in FIG. 1A, collectively referred to as 120).

[0137] In one possible implementation, the communication system shown in FIG. 1A can also be shown as in FIG. 1B, i.e., including one RAN node 110 and multiple terminal devices (e.g., 120A and 120B in FIG. 1B). In this case, a single RAN node can transmit data or control signaling to a single or multiple terminal devices.

[0138] In another possible implementation, the communication system shown in FIG. 1A can also be shown as in FIG. 1C, i.e., including multiple RAN nodes (e.g., 110A, 110B and 110C in FIG. 1C) 110 and one terminal device 120. In this case, multiple RAN nodes can also transmit data or control signaling to a single terminal device at the same time.

[0139] The communication between each network device and each terminal device in the communication system shown in FIG. 1A to FIG. 1C can also be represented in another form, as shown in FIG. 2, the terminal device 10 includes a processor 101, a memory 102 and a transceiver 103, the transceiver 103 includes a transmitter 1031, a receiver 1032 and an antenna 1033. The network device 20 includes a processor 201, a memory 202 and a transceiver 203, the transceiver 203 includes a transmitter 2031, a receiver 2032 and an antenna 2033. The receiver 1032 can be used to receive transmission control information through the antenna 1033, and the transmitter 1031 can be used to send transmission feedback information to the network device 20 through the antenna 1033. The transmitter 2031 can be used to send transmission control information to the terminal device 10 through the antenna 2033, and the receiver 2032 can be used to receive transmission feedback information sent by the terminal device 10 through the antenna 2033.

[0140] Optionally, FIG. 3 shows an example diagram of the RAN 100 being an O-RAN system, which can include other components than those shown in the figure. As shown in FIG. 3, the network device is also called an access network device. The access network device (RAN, which can be an eNB or a gNB or a next generation access network device) communicates with the core network (CN) through a backhaul link and communicates with the user equipment (UE) through an air interface.

[0141] Specifically, the baseband unit (BBU) in the access network device communicates with the core network (CN) through a backhaul link, and the radio unit (RU) in the access network device communicates with at least one UE through an air interface. The BBU communicates with at least one RU through a front-haul link, and the BBU and the RU can be co-located or not.

[0142] The BBU includes at least one central unit (CU) and at least one distributed unit (DU), which can communicate through at least one midhaul link.

[0143] Further, FIG. 4 shows an example of a network element function split and protocol layer structure of an O-RAN device.

[0144] In some examples, the CU is a logical node that carries the Radio Resource Control (RRC) layer, the Service Data Adaptation Protocol (SDAP) layer, the Packet Data Convergence Protocol (PDCP) layer, and other control functions of the access network device. The CU is connected to network nodes such as a core network through some interfaces, which can be E2 interface or the like. Optionally, the CU can have part of the functions of the core network. The CU (e.g., the PDCP layer and higher layers) is connected to the DU (e.g., the RLC layer and lower layers) through some interfaces, which can be F1 interface or the like. In some examples, these interfaces (e.g., the F1 interface) can provide control plane (C-Plane) and user plane (U-Plane) functions (e.g., interface management, system information management, UE context management, RRC message transmission, etc.). The F1AP is an application protocol of the F1 interface, which defines the signaling procedures of the F1 in some examples. The F1 interface supports the control plane F1-C and the user plane F1-U.

[0145] In some examples, the CU can be split into a CU-CP (Control Unit-Control Plane) and a CU-UP (Control Unit-User Plane), where the CU-CP is a logical node carrying the RRC layer and the PDCP-C (Control plane part of PDCP) layer, used to implement the control plane function of the CU. The CU-CP can interact with a network element in the core network used to implement the control plane function. The network element in the core network used to implement the control plane function can be an access and mobility function network element, such as an Access and Mobility Management Function (AMF) in a 5G system. The AMF network element is used to be responsible for mobility management in a mobile network, such as location updating of a terminal device, registration of the terminal device to a network, handover of the terminal device, and the like. The CU-UP is a logical node carrying the SDAP layer and the PDCP-U (User plane part of PDCP) layer, used to implement the user plane function of the CU. The CU-UP can interact with a network element in the core network used to implement the user plane function. The network element in the core network used to implement the user plane function, for example, a User Plane Function (UPF) in a 5G system, is used to be responsible for forwarding and receiving data in a terminal device. The above configuration of the CU and the DU is merely an example, and the CU and the DU can be configured to have functions as needed. For example, the CU or the DU can be configured to have functions of more protocol layers, or the CU or the DU can be configured to have partial processing functions of the protocol layers. For example, partial functions of the RLC layer and functions of protocol layers above the RLC layer are arranged in the CU, and the remaining functions of the RLC layer and functions of protocol layers below the RLC layer are arranged in the DU. For another example, the functions of the CU or the DU can be divided according to a service type or other system requirements, for example, according to a delay requirement. Functions that need to meet a relatively low delay requirement in processing time are arranged in the DU, and functions that do not need to meet the delay requirement are arranged in the CU.

[0146] In some examples, a DU is a logical node that hosts Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, Higher Physical Layer (Higher PHY) layer, and other functions. In some examples, a DU can control at least one RU. The DU is connected to the RUs through some interfaces, which can be a fronthaul interface. In some examples, the Higher PHY layer includes parts of PHY layer processing, such as Forward Error Correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.

[0147] In some examples, an RU is a logical node that hosts Lower Physical Layer (Lower PHY) and Radio Frequency (RF) processing. In some examples, an RU can be a 3GPP Transmission Reception Point (TRP) or a Remote Radio Head (RRH) or other similar functional entity. In some examples, the Low-PHY includes parts of PHY processing, such as fast Fourier transform (FFT), inverse fast Fourier transformation (IFFT), digital beamforming and filtering, etc. An RU communicates with one or more UEs over a wireless link.

[0148] The DU and the RU can be co-located or not. The DU and the RU exchange control plane information and user plane information via a Lower-Layer Split CUS-Plane (LLS-CUS) interface over a fronthaul link. The LLS-CUS can include a LLS-C interface and a LLS-U interface that provide a control plane (C-Plane) and a user plane (U-Plane), respectively. In some examples, the control plane (C-Plane) refers to real-time control between the DU and the RU. The DU and the RU exchange management information via a LLS-M interface of the fronthaul link, and the management plane (M-Plane) refers to non-real-time management operations between the DU and the RU.

[0149] The DU and the RU can cooperate to jointly implement the functions of the PHY layer. One DU can be connected with one or more RUs. The functions of the DU and the RU can be configured in various manners according to design. For example, the DU is configured to implement baseband functions, and the RU is configured to implement radio frequency functions. For another example, the DU is configured to implement high-layer functions in the PHY layer, and the RU is configured to implement low-layer functions in the PHY layer or implement the low-layer functions and radio frequency functions. The high-layer functions in the PHY layer can include a part of functions of the PHY layer that are closer to the MAC layer, and the low-layer functions in the PHY layer can include another part of functions of the PHY layer that are closer to the radio frequency side.

[0150] In different systems, the CU (or CU-CP and CU-UP), the DU, or the RU can also have different names, but those skilled in the art can understand their meanings. For example, in an ORAN system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. For the convenience of description, the CU, the CU-CP, the CU-UP, the DU, and the RU are taken as examples for description in this application.

[0151] Currently, a network device configures a CSI-RS resource for a terminal device, the terminal device performs measurement using the resource, and reports a CQI. Thus, the network device adjusts the MCS of a PDSCH according to the CQI reported by the terminal device, so as to implement scheduling of downlink data.

[0152] However, the period of the CSI-RS is generally long, the interference of the terminal device is different at different times, and the channel of the terminal device also changes with time, which can cause the CQI obtained based on the CSI-RS measurement to be inaccurate for PDSCH scheduling in the future.

[0153] For example, the terminal device reports a CQI=10 based on CSI-RS measurement, and the network device can first use CQI=10 for data transmission when scheduling PDSCH transmission. Since the interference at the terminal device side is different at different times, the SINR received by the terminal device can support PDSCH transmission with CQI=12 (but the actual network device uses CQI=10 for data transmission. The larger the CQI value, the higher the transmission efficiency, and the same resource can transmit more data). The difference between CQI12 and CQI10 is 2 orders of CQI, and assuming that each order of CQI corresponds to 2 dB, the network device needs to continuously transmit 40 data packets to make the CQI of the network device climb to CQI12 (40*0.1=4 dB). The above adjustment process is slow and time-consuming.

[0154] To solve the above technical problems, the embodiment of the present application provides a communication method and related device, after receiving the first data carried by the PDSCH, the terminal device feeds back the first feedback information obtained by measuring the reference signal related to the PDSCH to the network device, so that the network device can adjust the parameters used for subsequent scheduling in time according to the first feedback information reported by the terminal device to improve the transmission efficiency. Compared with the scheme in the prior art in which the network device can only report through the period of CSI-RS, the method provided by the present application can also feed back during the PDSCH transmission process, which can make the network device adjust the parameters used for scheduling data more timely.

[0155] For example, the network device uses CQI=10 to schedule the PDSCH transmission for the transmission of the first data, and the terminal device knows that the actual parameters supported by the current PDSCH can be CQI=12 based on the demodulation of the PDSCH. Therefore, the terminal device indicates that the actual value of CQI of the current PDSCH is 12 through the first feedback information, so that the network device can adjust the link adaptation accordingly, or challenge the CQI of the next PDSCH scheduling.

[0156] Please refer to FIG. 5, the embodiment of the present application provides a flowchart of a communication method, which includes steps 501 to 503. Steps 501 to 503 can be executed by a communication device. The communication device can refer to the communication device itself (for example, the terminal device and / or the network device), a component in the communication device (for example, a processor, a chip, or a chip system, etc.), or a logic module or software capable of realizing all or part of the functions of the communication device. The communication device can be the terminal device or the network device in the communication system shown in FIGS. 1A to 4. The following is described by taking the execution of the communication device as an example. The processes executed by a single execution subject in steps 501 to 503 can also be divided into processes executed by multiple execution subjects, which can be logically and / or physically separated. For example, in the case of the communication device being the network device, the processes executed by the communication device can be divided into processes executed by at least one of the CU, the DU, and the RU.

[0157] Step 501, the network device sends first data to the terminal device.

[0158] The network device sends the first data to the terminal device. Correspondingly, the terminal device receives the first data sent by the network device. The first data is carried on the PDSCH. And the PDSCH is associated with a reference signal.

[0159] The MCS used by the PDSCH to schedule the first data is a second MCS index value. Or it can be understood that the network device uses the second MCS index value to schedule the first data of the PDSCH.

[0160] Optionally, the reference signal associated with the PDSCH can include at least one of the following: a demodulation reference signal (DMRS), a phase-tracking reference signal (PT-RS), and the like, which are not limited herein.

[0161] At step 502, the terminal device sends first feedback information to the network device.

[0162] After the terminal device receives the first data, the terminal device sends first feedback information of the reference signal to the network device. Alternatively, it is understood that the first feedback information is used to indicate feedback information or measurement information of the PDSCH-related reference signal.

[0163] The first feedback information in the embodiments of the present application includes at least one of the following: a first parameter, a difference between the first parameter and a second parameter; the first parameter is a parameter obtained by measuring the reference signal, and the second parameter is a parameter used by the PDSCH.

[0164] The first parameter described above can be understood as a parameter obtained by measuring the PDSCH-related reference signal or the first data, or can be understood as a parameter actually reached by the PDSCH. Correspondingly, the second parameter can be understood as a parameter used by the network device to schedule the PDSCH to transmit the first data. In addition, the second parameter described above can be a parameter determined by the network device according to the CSI-RS result measured by the terminal device, or can be a parameter used by the last PDSCH scheduling, and the like, which are not limited herein.

[0165] The first parameter and / or the second parameter include at least one of the following: a reference signal receiving power (RSRP), a reference signal receiving quality (RSRP), a signal to interference plus noise ratio (SINR), a modulation and coding scheme (MCS), a channel quality indicator (CQI), and the like.

[0166] Alternatively, the first feedback information includes at least one of the following: a measurement value obtained by measuring the PDSCH-related reference signal, a difference between the measurement value and a parameter value used by the PDSCH to schedule the first data, and the like.

[0167] For example, the first feedback information includes at least one of the following: a measured first SINR (or a PDSCH actually supported SINR), a measured first MCS (or a PDSCH actually supported MCS), a measured first CQI (or a PDSCH actually supported CQI), a first difference between the measured first MCS and a second MCS used for the first data (or a PDSCH scheduling the first data), a second difference between the measured first SINR and a second SINR related to the second MCS used for the first data (or a PDSCH scheduling the first data), a third difference between the measured first CQI and a second CQI related to the second MCS used for the first data (or a PDSCH scheduling the first data), and the like.

[0168] It can be understood that the above-mentioned MCS, SINR and CQI are only examples, and in actual application, RSRP or RSRQ or the like can also be used, and the specific type is not limited here.

[0169] In a possible implementation manner, the first parameter and the second parameter are of the same type, and the terminal device can directly measure the first parameter, or directly measure and calculate the difference between the first parameter and the second parameter.

[0170] In another possible implementation manner, the first parameter and the second parameter are of different types, and the terminal device can first measure, and then convert to the case of the same type of parameters according to a mapping relationship to calculate the difference between the first parameter and the second parameter.

[0171] The mapping relationship can be various (i.e., the above-mentioned various parameter types can have an association relationship), for example, the SINR can have an association relationship with the MCS, the SINR can have an association relationship with the CQI, the CQI can have an association relationship with the MCS, and the like. The above-mentioned association relationship can be configured or pre-configured, i.e., the above-mentioned association relationship can be an association relationship pre-agreed by the network device and the terminal device, or an association relationship adopted by the network device or the terminal device according to a standard protocol, or an association relationship pre-stored in the network device or the terminal device, and the specific type is not limited here.

[0172] For example, assuming that the network device schedules the first data of the PDSCH with MCS=10 (corresponding to an SINR of 15 decibels), after the terminal device receives the first data of the PDSCH, the terminal device measures the SINR of the DMRS associated with the PDSCH to be 17 decibels (db), and 17 db can support MCS=11 (i.e., the measured MCS index value can support 11). Then the terminal device can report the following at least one to the network device: the latest MCS=11, the latest SINR=17, the difference 1 between the latest MCS and the MCS used to schedule the first data of the PDSCH (i.e., 1=11-10), the difference 2 between the latest SINR and the SINR corresponding to the MCS used to schedule the first data of the PDSCH (i.e., 2=17-15), and the like.

[0173] It can be understood that the above is only an example description taking SINR and MCS as examples, and in actual application, CQI, RSRP, RSRQ, and the like can also be used, which are not limited here.

[0174] For example, an example of the association between the index value of the CQI and other parameters (such as modulation mode, code rate, efficiency, and the like) is shown in Table 1.

[0175] Table 1

[0176] The modulation mode includes Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (16QAM), 64 Quadrature Amplitude Modulation (64QAM), and the like. It can be understood that the values in Table 1 are only an example of the relationship between the CQI index value and other parameters, and in actual application, other parameters or other values can also be included.

[0177] Optionally, the terminal device can feed back any one CQI value in Table 1 with 4 bits. In addition, the terminal device can also feed back the absolute value of the CQI according to the wideband or sub-band granularity.

[0178] Optionally, after receiving the first data of the PDSCH, the terminal device measures the reference signal associated with the PDSCH to obtain the first feedback information.

[0179] Optionally, the terminal device can send the first feedback information to the network device according to the wideband or sub-band granularity.

[0180] The number of bits occupied by the first feedback information in the embodiments of the present application can be set according to actual needs, and the specific number of bits is not limited herein. For example, the first feedback information can occupy 1 bit, 2 bits, or the like.

[0181] Optionally, the first feedback information can also be related to an adjustment amount of the network device, and the adjustment amount is used by the network device to optimize parameters of a subsequent PDSCH. The subsequent optimization of the PDSCH will be described in detail in step 503, and is not described herein.

[0182] Further, the first feedback information is used by the network device to adjust parameters of a subsequent PDSCH. That is, after receiving the first feedback information, the network device can determine an upper limit of parameters that can be actually reached by the PDSCH according to the first feedback information, and optimize transmission of the subsequent PDSCH according to the upper limit of the parameters. The process will be described in detail in step 503, and is not described herein.

[0183] The first feedback information in the embodiments of the present application can be located in uplink control information (UCI). According to different relationships between the first feedback information and fields in the UCI, the first feedback information can be divided into multiple cases, which are described as follows.

[0184] First, the first feedback information is a newly added bit in original bits in the UCI.

[0185] This case can also be understood as follows: In addition to the content of the first feedback information described above, the first feedback information can also be used to indicate any one of the following: a scheduling request (SR), an acknowledgment (ACK), or a negative acknowledgment (NACK), or the like. That is, this case increases the bit of the SR / ACK / NACK in the UCI.

[0186] For example, the first feedback information is also used to indicate whether the first data is correctly received. This example can also be understood as follows: The first feedback information is used not only to report parameter information (that is, the first parameter, the second parameter, a difference of the first parameter, or a difference of the second parameter, or the like), but also to report an ACK / NACK.

[0187] For example, multiple bits are newly added in the ACK / NACK of the UCI to indicate the parameter information described above.

[0188] Second, the first feedback information is a newly added bit in the UCI.

[0189] This case can also be understood as follows: The first feedback information is an independent bit in the UCI except for the SR / ACK / NACK. That is, the bit of the UCI is increased.

[0190] In this case, the first feedback information can be fed back together with the SR / ACK / NACK or not.

[0191] For example, the terminal device sends the second feedback information to the network device, and the second feedback information is used to indicate whether the first data is correctly received.

[0192] It can be understood that the above two cases are only examples of the relationship between the first feedback information and the UCI, and in actual application, there can be no relationship (i.e., independent uplink information) or other relationships, which are not limited here.

[0193] In step 503, the network device sends the second data to the terminal device. This step is optional.

[0194] Optionally, after receiving the first feedback information, the network device can adjust the parameters of the PDSCH through the first feedback information, and then send the second data to the terminal device through the adjusted PDSCH parameters. Correspondingly, the terminal device receives the second data sent by the network device.

[0195] Further, the parameters used by the PDSCH channel where the second data is located are the same as or different from the parameters used by the PDSCH channel where the first data is located.

[0196] For example, continuing the above example, assuming that the network device schedules the first data of the PDSCH with MCS = 10 (corresponding to SINR = 15 db), after the terminal device receives the first data of the PDSCH, the terminal device measures the SINR of the PDSCH-related reference signal to be 17 decibels (db), and 17 db can support MCS = 11 (i.e., the measured MCS index value can support 11). Then the terminal device can report the following at least one to the network device: the latest MCS = 11, the latest SINR = 17, the difference 1 between the latest MCS and the MCS used to schedule the first data of the PDSCH (i.e., 1 = 11-10), the difference 2 between the latest SINR and the SINR corresponding to the MCS used to schedule the first data of the PDSCH (i.e., 2 = 17-15), and the like. For example, the first feedback information received by the network device includes the latest MCS = 11, and the network device can schedule the second data of the PDSCH with MCS = 11. For another example, the first feedback information received by the network device includes the latest SINR = 17, and the network device determines the latest MCS = 11 through the mapping relationship between SINR and MCS, and can schedule the second data of the PDSCH with MCS = 11. For another example, the first feedback information received by the network device includes the difference of 1 in MCS, and the network device can adjust the MCS index value of 1 (i.e., the first MCS + 1 or the first MCS - 1) based on the first MCS used to schedule the first data of the PDSCH, and schedule the second data of the PDSCH with the adjusted MCS index value (i.e., the third MCS index value).

[0197] It can be understood that the above is only an example description taking SINR and MCS as examples, and in actual application, CQI, RSRP, RSRQ, and the like can also be used, which is not limited here.

[0198] Optionally, the first feedback information described in the foregoing step 502 can also be related to an adjustment amount of the network device, and the adjustment amount is used by the network device to optimize the parameters of the subsequent PDSCH. For example, the value of the first feedback information can correspond to different adjustment amounts, and the network device can refer to the corresponding adjustment amount when determining the parameters of the subsequent PDSCH.

[0199] For example, taking the first feedback information as an MCS difference (which can also be a SINR difference or a CQI difference, and the like) as an example, the relationship between the MCS difference and the adjustment amount can be as shown in Table 2:

[0200] Table 2

[0201] Wherein, n is a positive integer greater than 2, m is a positive integer greater than 2, n and m can be the same or different. The adjustment amount of 0 means that the MCS index value is not adjusted, the adjustment amount of 1 means that the MCS index value is adjusted by 1, the adjustment amount of 2 means that the MCS index value is adjusted by 2, and the adjustment amount of n means that the MCS index value is adjusted by m. The meaning of the change amount is to increase or decrease, and the change amount specifically refers to increase or decrease, which can be determined according to the actual needs, such as ACK / NACK of the first data (which will be described later), and is not limited here.

[0202] It can be understood that the first few rows in Table 2 are only described by taking the same MCS difference and adjustment amount as an example. In actual application, the MCS difference and the adjustment amount can be the same or different, and the MCS difference has an effect on the adjustment amount, which is not limited here.

[0203] In addition, the parameters used by the second data of the above-mentioned scheduled PDSCH can also be related to the ACK / NACK of the first data.

[0204] Further, the network device can also receive the ACK / NACK corresponding to the first data (which can be in the same message as the first feedback information, or not in the same message as the first feedback information).

[0205] In one possible implementation manner, in the case that the network device receives the NACK of the first data, the parameters used by the PDSCH channel where the second data is located are smaller than the parameters used by the PDSCH channel where the first data is located. For example, the third MCS index value used by the second data of the scheduled PDSCH is smaller than the second MCS index value. Or it can be understood that the second MCS index value used by the first data of the scheduled PDSCH can cause the terminal device to fail to correctly receive the first data, so that the MCS index value can be reduced when the second data is sent subsequently, so as to reduce the probability that the terminal device fails to correctly receive the second data. Or it can be understood that the terminal device does not expect the parameters used by the PDSCH channel where the second data is located to be higher than the parameters used by the PDSCH channel where the first data is located, or expects the parameters used by the PDSCH channel where the second data is located to be lower than the parameters used by the PDSCH channel where the first data is located. For example, the terminal device does not expect the third MCS index value to be higher than the second MCS index value, or expects the third MCS index value to be lower than the second MCS index value.

[0206] In another possible implementation manner, in a case where the network device receives the ACK of the first data, a parameter used by a PDSCH channel where the second data is located is greater than a parameter used by a PDSCH channel where the first data is located. For example, the third MCS index value is greater than the second MCS index value. Alternatively, it is understood that the second MCS index value used by the first data does not affect the terminal device to receive the first data, and therefore, when the second data is subsequently transmitted, the MCS index value can be increased to improve transmission efficiency. Alternatively, it is understood that the terminal device does not expect the parameter used by the PDSCH channel where the second data is located to be lower than the parameter used by the PDSCH channel where the first data is located, or expects the second MCS index value to be lower than the third MCS index value. For example, the terminal device does not expect the third MCS index value to be lower than the second MCS index value, or expects the second MCS index value to be lower than the third MCS index value.

[0207] Based on the foregoing scheme, after receiving the first data carried by the PDSCH, the terminal device feeds back, to the network device, first feedback information obtained by measuring a reference signal related to the PDSCH, so that the network device can timely adjust a parameter used for subsequent scheduling according to the first feedback information reported by the terminal device to improve transmission efficiency. Compared with the prior art in which the network device can only report the parameter through the periodic CSI-RS, the method provided in this application can also feed back during the PDSCH transmission, so that the network device can more timely adjust the parameter used for scheduling data.

[0208] In addition, before the embodiment shown in FIG. 5, the network device and the terminal device can also perform measurement and feedback of the CSI-RS, that is, the embodiment shown in FIG. 6 can be understood as a case where the parameter used for the first data is obtained according to the CSI-RS measurement. Specifically, another flowchart of the communication method provided in the embodiment of the application can be as shown in FIG. 6. The method includes steps 601 to 605. Steps 601 to 605 can be performed by a communication apparatus. The "communication apparatus" can refer to the communication apparatus itself (for example, the terminal device and / or the network device), a component (for example, a processor, a chip, or a chip system) in the communication apparatus, or a logic module or software capable of realizing all or part of the functions of the communication apparatus. The communication apparatus can be the terminal device or the network device in the communication system shown in FIGS. 1A to 4. The following is described by taking the communication apparatus as an example. The processing performed by a single execution subject in steps 601 to 605 can also be divided into processing performed by multiple execution subjects, which can be logically and / or physically separated. For example, in a case where the communication apparatus is the network device, the processing performed by the communication apparatus can be divided into processing performed by at least one of the CU, the DU, and the RU.

[0209] In step 601, the network device sends a first reference signal to the terminal device.

[0210] The network device sends the first reference signal to the terminal device. Correspondingly, the terminal device receives the first reference signal sent by the network device.

[0211] The first reference signal and the description of the resource used by the first reference signal can refer to the related description of CSI-RS in the foregoing term explanation, which will not be described here again.

[0212] In step 602, the terminal device sends the measurement result of the first reference signal to the network device.

[0213] After receiving the first reference signal, the terminal device measures the first reference signal and sends the measurement result of the first reference signal to the network device. Correspondingly, the network device receives the measurement result of the first reference signal sent by the terminal device.

[0214] The reporting period and measurement process of the measurement result of the first reference signal can refer to the related description of CSI in the foregoing term explanation, which will not be described here again.

[0215] Optionally, the measurement result is related to the parameter used by the first data. That is, after receiving the measurement result, the network device determines the parameter used by the first data on the PDSCH according to the measurement result. For example, the network device determines to schedule the first data on the PDSCH using a second MCS index value according to the measurement result.

[0216] In step 603, the network device sends the first data to the terminal device.

[0217] In step 604, the terminal device sends the first feedback information to the network device.

[0218] In step 605, the network device sends the second data to the terminal device. This step is optional.

[0219] The step 603 and the step 605 in the embodiment can refer to the description of the step 501 to the step 503 in the embodiment shown in FIG. 5, which will not be described here again. In order to distinguish the parameter in the embodiment shown in FIG. 5 from the parameter in the step 601, the reference signal related to the PDSCH carried by the first data can also be called the second reference signal.

[0220] Based on the above scheme, after the network device determines the parameter used by the PDSCH through the measurement report, the network device schedules the first data on the PDSCH through the parameter, and after the terminal device receives the first data carried by the PDSCH, the terminal device feeds back the first feedback information obtained by measuring the reference signal related to the PDSCH to the network device, so that the network device can adjust the parameter used for subsequent scheduling in time according to the first feedback information reported by the terminal device to improve the transmission efficiency. Compared with the scheme in the prior art in which the network device can only report through the period of the CSI-RS, the method provided in the present application can also feed back during the PDSCH transmission process, so that the network device can adjust the parameter used for scheduling data more timely.

[0221] The communication method in the embodiments of the present application is described above, and the communication device in the embodiments of the present application is described below. Referring to FIG. 7, one embodiment of the communication device 700 in the embodiments of the present application can implement the functions of the terminal device in the above method embodiments, and thus can also implement the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the communication device 700 can be a communication device, or an integrated circuit or element inside the communication device, such as a chip. The communication device 700 includes a transceiver unit 701. Alternatively, the communication device 700 includes the transceiver unit 701 and a processing unit 702.

[0222] In a possible implementation manner, the communication device 700 is the terminal device in the embodiments shown in FIGS. 1A to 6, and in this case, the functions of each unit are as follows.

[0223] The transceiver unit 701 is configured to receive first data, the first data being carried on a physical layer downlink shared channel (PDSCH), and the PDSCH being associated with a reference signal.

[0224] The transceiver unit 701 is further configured to send first feedback information of the reference signal, the first feedback information including at least one of the following: a first parameter and a difference between the first parameter and a second parameter, the first parameter being a parameter obtained by measuring the reference signal, and the second parameter being a parameter used by the PDSCH.

[0225] Optionally, the first parameter and / or the second parameter include at least one of the following: a reference signal received power (RSRP), a reference signal received quality (RSRP), a signal to interference plus noise ratio (SINR), a modulation and coding strategy (MCS), and a channel quality indicator (CQI).

[0226] Optionally, the first feedback information is used by the network device to adjust the parameter used by the PDSCH to transmit the first data.

[0227] Optionally, the first feedback information is further used to indicate whether the first data is correctly received.

[0228] Optionally, the transceiver 701 is further configured to send second feedback information of the first data, the second feedback information being used to indicate whether the first data is correctly received.

[0229] Optionally, the transceiver 701 is further configured to receive second data, a parameter used by a PDSCH channel where the second data is located being the same as or different from a parameter used by a PDSCH channel where the first data is located.

[0230] Optionally, in a case where the terminal device does not correctly receive the first data, the parameter used by the PDSCH channel where the second data is located is smaller than the parameter used by the PDSCH channel where the first data is located.

[0231] Optionally, in a case where the terminal device correctly receives the first data, the parameter used by the PDSCH channel where the second data is located is larger than the parameter used by the PDSCH channel where the first data is located.

[0232] Optionally, the reference signal includes at least one of the following: a DMRS, a PT-RS, and the like.

[0233] In the embodiment, the operations performed by the units in the communication apparatus are similar to the description of the terminal device in the foregoing embodiments shown in FIGS. 1A-6, and thus are not described herein again.

[0234] In the embodiment, after receiving the first data carried by the PDSCH, the transceiver 701 feeds back, to the network device, first feedback information obtained by measuring the reference signal related to the PDSCH, so that the network device can timely adjust the parameter used for subsequent scheduling to improve transmission efficiency according to the first feedback information reported by the terminal device. Compared with the prior art in which the network device can only report through the period of the CSI-RS, the method provided in the application can also feed back during the PDSCH transmission process, which can enable the network device to more timely adjust the parameter used for scheduling data.

[0235] In another possible implementation manner, the communication apparatus 700 is the network device in the foregoing embodiments shown in FIGS. 1A-6, and the functions of the units are as follows:

[0236] The transceiver 701 is configured to send first data, the first data being carried by a physical layer downlink shared channel (PDSCH), and the PDSCH being associated with a reference signal.

[0237] The transceiver 701 is further configured to receive first feedback information of the reference signal, the first feedback information including at least one of the following: a first parameter, and a difference between the first parameter and a second parameter; the first parameter is a parameter obtained by measuring the reference signal, and the second parameter is a parameter used by the PDSCH.

[0238] Optionally, the first parameter and / or the second parameter comprises at least one of: a reference signal received power (RSRP), a reference signal received quality (RSRP), a signal to interference plus noise ratio (SINR), a modulation and coding strategy (MCS), a channel quality indicator (CQI).

[0239] Optionally, the first feedback information is used for the network device to adjust a parameter used for PDSCH transmission of the first data.

[0240] Optionally, the first feedback information is further used to indicate whether the first data is correctly received.

[0241] Optionally, the transceiver 701 is further configured to receive second feedback information of the first data, the second feedback information being used to indicate whether the first data is correctly received.

[0242] Optionally, the transceiver 701 is further configured to transmit second data, a PDSCH channel used for the second data being the same as or different from a PDSCH channel used for the first data.

[0243] Optionally, in a case where the terminal device does not correctly receive the first data, a PDSCH channel used for the second data is smaller than a PDSCH channel used for the first data.

[0244] Optionally, in a case where the terminal device correctly receives the first data, a PDSCH channel used for the second data is larger than a PDSCH channel used for the first data.

[0245] Optionally, the reference signal comprises at least one of: a DMRS, a PT-RS, etc.

[0246] In the embodiment, the operations performed by the units in the communication device are similar to the description of the network device in the foregoing embodiments shown in FIGS. 1A-6, and thus are not described herein.

[0247] In the embodiment, after the transceiver 701 transmits the first data carried by the PDSCH to the terminal device, the transceiver 701 can receive first feedback information of a PDSCH-related reference signal reported by the terminal device, so that the network device can timely adjust a parameter used for subsequent scheduling according to the first feedback information reported by the terminal device to improve transmission efficiency. Compared with the prior art in which the network device can only report through a periodic CSI-RS, the method provided in the present application can also provide feedback during PDSCH transmission, so that the network device can more timely adjust a parameter used for scheduling data.

[0248] Please refer to FIG. 8, which is another schematic structural diagram of a communication apparatus 800 provided in the present application, the communication apparatus 800 includes a logic circuit 801 and an input / output interface 802. The communication apparatus 800 can be a chip or an integrated circuit.

[0249] The transceiver unit 701 shown in FIG. 7 can be a communication interface, which can be the input / output interface 802 shown in FIG. 8. The input / output interface 802 can include an input interface and an output interface. Alternatively, the communication interface can be a transceiver circuit, which can include an input interface circuit and an output interface circuit. The processing unit 702 shown in FIG. 7 can be the logic circuit 801 shown in FIG. 8.

[0250] Optionally, in the case where the communication apparatus is the terminal device in the foregoing embodiments, the logic circuit 801 is configured to measure the first data. The input / output interface 802 is configured to perform at least one of the following: receiving the first data, sending the feedback information (e.g., the first feedback information, the second feedback information), and receiving the second data.

[0251] Optionally, in the case where the communication apparatus is the network device in the foregoing embodiments, the logic circuit 801 is configured to adjust the parameter used by the PDSCH according to the first feedback information. The input / output interface 802 is configured to perform at least one of the following: sending the first data, receiving the feedback information (e.g., the first feedback information, the second feedback information), and sending the second data.

[0252] The logic circuit 801 and the input / output interface 802 can also perform other steps and achieve corresponding beneficial effects performed by the terminal device or the network device in any of the embodiments, which will not be described here.

[0253] Optionally, the logic circuit 801 can be a processing apparatus, and the functions of the processing apparatus can be partially or entirely implemented through software.

[0254] Optionally, the processing apparatus can include a memory and a processor. The memory is configured to store a computer program, and the processor is configured to read and execute the computer program stored in the memory to perform the corresponding processing and / or steps in any of the method embodiments.

[0255] Optionally, the processing apparatus can include only the processor. The memory for storing the computer program is located outside the processing apparatus, and the processor is connected with the memory through a circuit / wire to read and execute the computer program stored in the memory. The memory and the processor can be integrated together or can be physically independent of each other.

[0256] Optionally, the processing device can be one or more chips, or one or more integrated circuits. For example, the processing device can be one or more field-programmable gate arrays (FPGA), application specific integrated circuits (ASIC), system on chips (SoC), central processor units (CPU), network processors (NP), digital signal processors (DSP), micro controller units (MCU), programmable logic devices (PLD) or other integrated circuits, or any combination of the above chips or processors.

[0257] Referring to FIG. 9, a communication device 900 involved in the above embodiments provided by the embodiments of the present application is specifically a communication device as a terminal device in the above embodiments.

[0258] A possible logical structure diagram of the communication device 900 is shown in FIG. 9, which can include but is not limited to at least one processor 901 and a communication port 902.

[0259] The transceiver unit 701 shown in FIG. 7 can be a communication interface, which can be the communication port 902 in FIG. 9, and the communication port 902 can include an input interface and an output interface. Alternatively, the communication port 902 can also be a transceiver circuit, which can include an input interface circuit and an output interface circuit.

[0260] Further optionally, the device can further include at least one of a memory 903 and a bus, and in the embodiments of the present application, the at least one processor 901 is configured to control and process the actions of the communication device 900.

[0261] Further, the processor 901 can be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic device, transistor logic, hardware component, or any combination thereof. It can implement or execute various example logical blocks, modules, and circuits described in connection with the disclosure. The processor can also be a combination of computing functionality, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. For the sake of brevity and conciseness, the specific processes performed by the system, apparatus, and units described above can be referred to the corresponding processes in the method embodiments described above, and will not be described herein again.

[0262] It should be noted that the communication apparatus 900 shown in FIG. 9 can be specifically used to implement the steps implemented by the terminal device in the foregoing method embodiments, and achieve the corresponding technical effects of the terminal device. The specific implementation of the communication apparatus shown in FIG. 9 can be referred to the description in the foregoing method embodiments, and will not be described herein again.

[0263] Referring to FIG. 10, FIG. 10 is a structural schematic diagram of a communication apparatus 1100 provided by an embodiment of the present application, which can be the communication apparatus as the network device in the foregoing embodiments. The structure of the communication apparatus can be referred to the structure shown in FIG. 10.

[0264] The communication apparatus 1100 includes at least one processor 1011 and at least one network interface 1014. Further optionally, the communication apparatus further includes at least one memory 1012, at least one transceiver 1013, and one or more antennas 1015. The processor 1011, the memory 1012, the transceiver 1013, and the network interface 1014 are connected, for example, through a bus. In the embodiments of the present application, the connection can include various interfaces, transmission lines, or buses, etc., and the embodiments of the present application do not limit the same. The antenna 1015 is connected to the transceiver 1013. The network interface 1014 is configured to enable the communication apparatus to communicate with other communication devices through a communication link. For example, the network interface 1014 can include a network interface between the communication apparatus and a core network device, such as an S1 interface. The network interface can include a network interface between the communication apparatus and other communication apparatuses (such as other network devices or core network devices), such as an X2 or Xn interface.

[0265] The transceiver unit 701 shown in FIG. 7 can be a communication interface, which can be the network interface 1014 in FIG. 10. The network interface 1014 can include an input interface and an output interface. Alternatively, the network interface 1014 can be a transceiver circuit, which can include an input interface circuit and an output interface circuit.

[0266] The processor 1011 is mainly used for processing communication protocols and communication data, controlling the whole communication device, executing software programs, processing data of the software programs, such as for supporting the communication device to perform actions described in the embodiments. The communication device can include a baseband processor mainly used for processing communication protocols and communication data, and a central processor mainly used for controlling the whole communication device, executing software programs, and processing data of the software programs. The processor 1011 in FIG. 10 can integrate the functions of the baseband processor and the central processor, and those skilled in the art can understand that the baseband processor and the central processor can also be independent processors interconnected by a bus or the like. Those skilled in the art can understand that the communication device can include multiple baseband processors to adapt to different network modes, and the communication device can include multiple central processors to enhance the processing capability, and various components of the communication device can be connected by various buses. The baseband processor can also be referred to as a baseband processing circuit or a baseband processing chip. The central processor can also be referred to as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built in the processor, or stored in the memory in the form of software programs, and the baseband processing function is realized by the processor executing the software programs.

[0267] The memory is mainly used for storing software programs and data. The memory 1012 can exist independently and be connected with the processor 1011. Alternatively, the memory 1012 can be integrated with the processor 1011, for example, integrated in a chip. The memory 1012 can store program codes for executing the technical solutions of the embodiments of the present application, and the processor 1011 controls the execution. Various computer programs executed can also be regarded as a driver of the processor 1011.

[0268] FIG. 10 only shows one memory and one processor. In an actual communication device, multiple processors and multiple memories can exist. The memory can also be referred to as a storage medium or a storage device, etc. The memory can be a storage element on the same chip as the processor, that is, an on-chip storage element, or an independent storage element, and the embodiments of the present application do not limit this.

[0269] The transceiver 1013 can be configured to support the receiving or transmitting of radio frequency signals between the communication device and a terminal. The transceiver 1013 can be connected to the antenna 1015. The transceiver 1013 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1015 can receive radio frequency signals, the receiver Rx of the transceiver 1013 is configured to receive the radio frequency signals from the antenna and convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and provide the digital baseband signals or digital intermediate frequency signals to the processor 1011 for further processing, such as demodulation processing and decoding processing, by the processor 1011. In addition, the transmitter Tx in the transceiver 1013 is also configured to receive modulated digital baseband signals or digital intermediate frequency signals from the processor 1011, and convert the modulated digital baseband signals or digital intermediate frequency signals into radio frequency signals, and transmit the radio frequency signals through one or more antennas 1015. Specifically, the receiver Rx can selectively perform one or more levels of down-mixing and analog-to-digital conversion to obtain digital baseband signals or digital intermediate frequency signals, and the order of the down-mixing and analog-to-digital conversion can be adjustable. The transmitter Tx can selectively perform one or more levels of up-mixing and digital-to-analog conversion to obtain radio frequency signals, and the order of the up-mixing and digital-to-analog conversion can be adjustable. The digital baseband signals and the digital intermediate frequency signals can be collectively referred to as digital signals.

[0270] The transceiver 1013 can also be referred to as a transceiving unit, a transceiver, a transceiving device, etc. Optionally, the devices in the transceiving unit for implementing the receiving function can be regarded as a receiving unit, and the devices in the transceiving unit for implementing the transmitting function can be regarded as a transmitting unit, that is, the transceiving unit includes the receiving unit and the transmitting unit, the receiving unit can also be referred to as a receiver, an input port, a receiving circuit, etc., and the transmitting unit can be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0271] It should be noted that the communication device 1100 shown in FIG. 10 can be specifically configured to implement the steps implemented by the network device in the foregoing method embodiments, and achieve the corresponding technical effects of the network device. The specific implementation mode of the communication device 1100 shown in FIG. 10 can be referred to the description in the foregoing method embodiments, which will not be described here one by one.

[0272] The embodiments of the present application also provide a computer readable storage medium for storing one or more computer execution instructions, when the computer execution instructions are executed by a processor, the processor executes the method described in the possible implementation mode of the terminal device or the network device in the foregoing embodiments.

[0273] The embodiment of the present application further provides a computer program product (or computer program), when the computer program product is executed by the processor, the processor executes the method of the possible implementation manners of the terminal device or the network device.

[0274] The embodiment of the present application further provides a chip system, which comprises at least one processor, and is used for supporting the communication device to realize the functions involved in the possible implementation manners of the communication device. Optionally, the chip system further comprises an interface circuit, which provides program instructions and / or data for the at least one processor. In a possible design, the chip system can further comprise a memory, which is used for storing necessary program instructions and data of the communication device. The chip system can be composed of a chip, or can comprise the chip and other discrete devices, and the communication device can be the terminal device or the network device in the foregoing method embodiments.

[0275] The embodiment of the present application further provides a communication system, which comprises the terminal device and the network device in any of the foregoing embodiments.

[0276] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented by other means. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0277] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0278] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0279] When the communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the method embodiments. The terminal chip receives information from the base station, which can be understood as the information being received by other modules (such as a radio frequency module or an antenna) in the terminal first, and then being sent to the terminal chip by the modules. The terminal chip sends information to the base station, which can be understood as the information being sent to other modules (such as a radio frequency module or an antenna) in the terminal first, and then being sent to the base station by the modules.

[0280] When the communication device is a chip applied to a base station, the base station chip implements the functions of the base station in the method embodiments. The base station chip receives information from the terminal, which can be understood as the information being received by other modules (such as a radio frequency module or an antenna) in the base station first, and then being sent to the base station chip by the modules. The base station chip sends information to the terminal, which can be understood as the information being sent to other modules (such as a radio frequency module or an antenna) in the base station first, and then being sent to the terminal by the modules.

[0281] It can be understood that the processor in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0282] The method steps in the embodiments of the present application can be implemented in hardware, or in software instructions executable by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a mobile hard disk, a CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. The processor and the storage medium can also exist as discrete components in the base station or the terminal.

[0283] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are performed. The computer can be a general purpose computer, a special purpose computer, a computer network, a network device, a user equipment or other programmable apparatus. The computer programs or instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer programs or instructions can be transferred from one website site, computer, server or data center to another website site, computer, server or data center through wired or wireless manner. The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center and the like integrated with one or more available media. The available media can be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; an optical medium, such as a digital video disc; a semiconductor medium, such as a solid state disk. The computer readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile storage media.

[0284] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0285] It can be understood that various numerical numbers involved in the embodiments of the present application are only for convenient differentiation, and are not used to limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the execution order, and the execution order of the processes should be determined according to its function and inherent logic.

Claims

1. A communication method characterized by comprising: The method comprises: receiving first data, the first data being carried on a physical layer downlink shared channel (PDSCH), the PDSCH being associated with a reference signal; sending first feedback information of the reference signal, the first feedback information comprising at least one of: a first parameter, a difference between the first parameter and a second parameter; the first parameter being a parameter obtained by measuring the reference signal, and the second parameter being a parameter used by the PDSCH.

2. The method of claim 1, wherein, The first parameter and / or the second parameter comprises at least one of: reference signal received power (RSRP), reference signal received quality (RSRP), signal to interference plus noise ratio (SINR), modulation and coding strategy (MCS), and channel quality indication (CQI).

3. The method according to claim 1 or 2, characterized in that, The first feedback information is used for a network device to adjust a parameter used by the PDSCH to transmit the first data.

4. The method according to any one of claims 1 to 3, characterized in that, The first feedback information is also used to indicate whether the first data is correctly received.

5. The method according to any one of claims 1 to 3, characterized in that, The method further comprises: sending second feedback information of the first data, the second feedback information being used to indicate whether the first data is correctly received.

6. The method according to any one of claims 1 to 5, characterized in that, The method further comprises: receiving second data, a parameter used by a PDSCH channel of the second data being the same as or different from a parameter used by a PDSCH channel of the first data.

7. The method of claim 6, wherein, In a case where the terminal device does not correctly receive the first data, the parameter used by the PDSCH channel of the second data is smaller than the parameter used by the PDSCH channel of the first data.

8. The method according to claim 6 or 7, characterized in that, In a case where the terminal device correctly receives the first data, the parameter used by the PDSCH channel of the second data is larger than the parameter used by the PDSCH channel of the first data.

9. The method according to any one of claims 1 to 8, characterized in that, The reference signal comprises at least one of: a demodulation reference signal (DMRS) or a phase tracking reference signal (PT-RS).

10. A communication method characterized by comprising: The method comprises: sending first data, the first data being carried on a physical layer downlink shared channel (PDSCH), the PDSCH being associated with a reference signal; receiving first feedback information of the reference signal, the first feedback information comprising at least one of: a first parameter, a difference between the first parameter and a second parameter; the first parameter being a parameter obtained by measuring the reference signal, and the second parameter being a parameter used by the PDSCH.

11. The method of claim 10, wherein, The first parameter and / or the second parameter comprises at least one of: reference signal received power (RSRP), reference signal received quality (RSRP), signal to interference plus noise ratio (SINR), modulation and coding strategy (MCS), and channel quality indication (CQI).

12. The method according to claim 10 or 11, characterized in that, The first feedback information is used for a network device to adjust a parameter used by the PDSCH to transmit the first data.

13. The method according to any one of claims 10 to 12, characterized in that, The first feedback information is also used to indicate whether the first data is correctly received.

14. The method according to any one of claims 10 to 12, characterized in that, The method further comprises: receiving second feedback information of the first data, the second feedback information being used to indicate whether the first data is correctly received.

15. The method according to any one of claims 10 to 14, characterized in that, The method further comprises: sending second data, a parameter used by a PDSCH channel of the second data being the same as or different from a parameter used by a PDSCH channel of the first data.

16. The method of claim 15, wherein, In case the terminal device does not correctly receive the first data, the parameters used for the PDSCH channel where the second data is located are smaller than the parameters used for the PDSCH channel where the first data is located.

17. The method according to claim 15 or 16, characterized in that, In case the terminal device correctly receives the first data, the parameters used for the PDSCH channel where the second data is located are larger than the parameters used for the PDSCH channel where the first data is located.

18. The method according to any one of claims 10 to 17, characterized in that, The reference signal comprises at least one of: a demodulation reference signal, DMRS, or a phase tracking reference signal, PT-RS.

19. A communications device, characterized by The apparatus comprises means or units for performing the method according to any one of claims 1 to 18.

20. A communications device, characterized by The apparatus comprises at least one processor configured to perform the method according to any one of claims 1 to 18.

21. The communication apparatus according to claim 20, wherein, The communication device is a chip or a chip system.

22. A computer-readable storage medium, characterized in that, The computer readable storage medium has stored computer programs or instructions which, when executed by a communication device, implement the method according to any one of claims 1 to 18.

23. A computer program product, characterised in that, The computer readable storage medium has stored computer programs or instructions which, when executed by a communication device, implement the method according to any one of claims 1 to 18.

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